2017年8月21日星期一

Solutions to improve service life of ladle slide gate plate

slide gate plate
slide gate plate
Slide gate plate is the most important part among the slide gate nozzle system, which directly control the flow of the molten steel. Due to long time contact with high temperature molten steel and frequently strong heat impact, it easily got spoiled. Following are some solutions that could promote slide gate plate service life.

1.Types of slide gate plate
It is better to use the alumina- carbon based slide gate plate, which has a good erosion and strong thermal shock resistance. Bonded with carbon material, this type of slide gate characterized with high thermal conductivity and low thermal expansion coefficient.

2.Installation of slide gate plate
Make sure the fire mortar has a suitable proportion, mixed well and suitable proportion and no impurities. Never use the dried and lumpy mortar. It is also not acceptable to mix the new mortar with the used one. Make sure the upper nozzle is clean, no any residue in refractory company slide gate frame and sliding mechanism. Before installation, make sure the slide gate are not deformed or cracked. Keep the slide gate steady and smooth during the installation, and check whether there is any bump and swing after installation.

3.Using of slide gate plate
It is better to adapt auto cast program when casting steel, do not frequently and drastically open or close the slide gate. Once in need of burn oxygen, the slide gate plate must be fully opened and discharge the slide gate sand as much as possible.

Changxing Refractory material not only provides qualified slide gate plate, but also can dispatch technician for site service. Shall be any interest, please contact us.

Article source:
Solutions to improve service life of ladle slide gate plate

E-mail:sales8@chinaelong.com

The notes for using slide gate plate

slide gate plate
slide gate plate
1.Hot mechanical damage, hot chemical erosion and misoperation are the main three reasons for the damage of slide gate plate;

2.Use alumina zirconium carbon slide gate plate, ensure slide gate plate has good erosion resistance and thermal shock resistance; use slide gate and mechanism with reasonable design and even stress distribution, the service life of slide gate plate can be effectively improved;

3.Follow the standard operation procedure during the tapping of molten steel; right and good maintenance of refractory material slide gate plate can also improve the service life of slide gate plate.

Article source:
The notes for using slide gate plate
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2017年8月14日星期一

How to Choose Refractory Bricks Used for Different Parts of Blast Furnace


Refractory Brick
Refractory Brick
How to choose refractory brick used for different parts of blast furnace?
When choosing refractory brick used for different lining parts of blast furnace, we should follow some principles. The refractory lining of every part should fit the parts thermal current intensity, so that the lining can maintain previous vertebral shape and stability under the impact of strong heat flux.

Here are some methods of selecting refractory brick for every part of furnace lining.

(1) Furnace throat. It mainly needs to withstand impact and abrasion of burden, so generally we use steel brick or water cooling steel brick for the furnace throat.

(2) The upper shaft. Plus the burden descent and ascending gas flow of scour and wear. Therefore, we should choose resistance to chemical erosion and abrasion resistance of refractory material, the most appropriate is high relative density brick, high density, high aluminum brick or phosphoric acid impregnated clay brick.

(3) The middle and lower part of furnace and furnace bosh. The main mechanism of damage is thermal shock, high temperature gas scouring, and impact of alkali metals, zinc and carbon deposition, as well as chemical erosion of the initial slag. For those three parts, we should choose refractory materials with properties of thermal shock resistance, slag erosion resistance and erosion prevention. For blast furnace whose volume is smaller than 1000m3, we can use aluminum carbon refractory bricks used in blast furnace.

(4) Furnace bosh. Hot gas erosion and iron slag erosion are the main reasons for furnace bosh damage, this part of the heat flux intensity, refractory material life not long (as long as 1 to 2 months, as short as 2 to 3 weeks), generally used in refractory degree is high, load softening temperature is high and the volume density of refractory material, such as the high aluminum brick, alumina carbon brick.

(5) Hearth tuber. This site is only in blast furnace of oxidation reaction area, high temperature from 1900 to 2400 DEG C, lining by damage caused by high temperature thermal stress. Composite brick masonry hearth tuyere zone is adopted by the modern blast furnace, material for high alumina, corundum Mo mullite; corundum and silicon nitride combined silicon carbide, useful also hot pressed carbon block.

(6) The lower part and bottom of hearth. For those two parts, we use hot pressing small carbon brick, micro porous carbon brick, and hot semi graphite carbon brick with high thermal conductivity, good resistance to penetration, good resistance to chemical erosion, low porosity and micro aperture, as well as brown corundum or gray corundum brick used for ceramic cup.


Article source:
How to Choose Refractory Bricks Used for Different Parts of Blast Furnace

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Basic properties of refractory material for steel making

refractory material
refractory material
As we all know that refractory material is of various kinds and is widely used and also of great importance in steel industry. The following are some refractories commonly used in steel industry summarized by Changxing Refractory engineers.

(1) Refractories for converter
Magnesia carbon brick is used for furnace cap, tapping converter mouth, before and after the surface, weld pool and bottom; high strength magnesia carbon brick is used for trunnion and slag line. Usually the MgO content in magnesia carbon brick is 70 ~ 75%, graphite is 16 ~ 20%, bulk density is 2.8 ~ 2.9 g/cm3, compressive strength is 25 ~ 30 MPa. The elements of high strength magnesia carbon brick are the same elements as magnesia carbon brick, but its compressive strength should be 30 ~ 42 MPa.

(2) Refractories for electric furnace
Furnace hearth, furnace slope and molten pool are overall rammed with magnesia clinker, or constructed with magnesia brick which is made of magnesia carbon brick and tar asphalt; high-quality magnesia carbon brick is used for hot and slag line area; magnesia brick and magnetite chrome brick are used for tapping hole and the two sides of furnace door; high alumina bricks or high alumina uncalcined brick are used for furnace cover.

(3) Refractories for UHP EAF
For permanent lining of ultra high power EAF, using magnesium stone; for furnace doorjamb, using magnesia chrome brick; for slag line, eccentric bottom and molten pool, using magnesia brick; for hot spots, furnace wall and tapping hole, using magnesia carbon brick; for furnace cover, using high alumina brick; for tapping hole filler, using high ankerite filling material.

According to the working conditions of various steel furnaces, it can be proved that the refractory material for steel making working circumstance is very bad. Therefore, whatever refractories are used, it must possess the following properties.
(1) High temperature resistant and high refractoriness.
(2) Erosion and erosion resistance to high temperature molten steel and slag.
(3) The steelmaking furnace works discontinuously, thus requires refractory materials for furnace with good thermal shock resistance and spalling resistance.
(4) High mechanical strength, can withstand impact of furnace tilting and furnace charge loading with no damage.

Article source:
Basic properties of refractory material for steel making

E-mail:sales8@chinaelong.com

2017年8月4日星期五

What are the refractory materials used in induction furnace

Induction furnace is more commonly used in a melting metal furnace, the current mainly used to melt molten iron, molten steel, copper, aluminum, according to the different melting products, the use of different Medium frequency induction furnace refractory lining materials.
General melting molten iron, the use of quartz sand dry vibration refractory material;
Melting molten steel, using magnesia or alumina material;
Aluminum is made of alumina or clay.
Specific to the furnace, also divided into: coil mud, mouth, mica and insulation layer, dry vibration material layer. General mouth with plastic.

More refractory material:
What are the refractory materials used in induction furnace

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What is refractory castable

refractory castable
refractory castable
Refractory castable is premixed combinations of refractory aggregates, matrix components or modifiers, bonding agents, and admixtures. It is classified in several ways. It is based on chemistries which separates the refractory castable based on alumina and alumino-silicate aggregates such as magnesite and dolomite.

Refractory aggregates constitute the basic skeleton of castable materials , and it is accounted for the largest amount of the formulation. Aggregates size can range from 10 mm to 300 mm. Aggregates are sized and proportioned for getting desired packing and particle distribution. Varieties of refractory material aggregates is workable. Castable is formulated based on one or combined aggregates to realize the desired chemistry, mineralogy, and physical properties.

The bonding agents used for insulating castable refractory  are varieties, including alumino-silicate castable. Calcium aluminium cement is still the main bonding agent for castable. Specialized castables have been developed for more than 20 years, by using non cement bonds such like hydratable alumina, clay, silica and alumina gels, and chemical bonds such like mono aluminum phosphate, phosphoric acid and alkali silicates. Basic castables rely on chemical or organic bonds, the most common types are alkali silicates, sodium phosphates, mineral or organic acids, and resins etc.

Article source:
What is refractory castable

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2017年7月28日星期五

Refractories for electric furnace roof

Refractories for electric furnace
Refractories for electric furnace
Electric furnace roof prefabricated with special high-alumina materials, fused corundum, chromium oxide and a variety of additives as the main refractory raw material, the prefabricated, dry and other processes from the production. With high temperature strength, anti-peeling performance and slag erosion performance, easy assembly, long service life. It is suitable for use in the top triangular area of the furnace and the working area of LF furnace.

Electric furnace cover with refractory brick require good thermal shock resistance, high temperature splash on the erosion resistance, as well as good integrity, solid structure is not crack and so on.

Electric furnace lid with refractory material development trend is: brick - prefabricated block - the overall pouring, the specific conditions of different countries, the use of materials are not the same.

For alkaline firebrick cover, electric tile with magnets. In order to ensure the stability of the furnace cover structure and reduce the deformation and peeling of magnesia, the use of iron plaster or masonry insert iron. As the metal induced current (especially high power electric furnace refractories cover), the formation of local overheating to non-magnetic steel brick, on the other hand pure magnesia brick linear expansion coefficient is too large, the amount of small.

In addition, the whole pouring the lid. The use of the overall casting furnace lid to promote the life of the furnace to further improve. After the water is cooled, the electrode is also water-cooled around the electrode, and the high-alumina ultra-low cement castable containing 3% Cr2O3 is added from the material and the stainless steel fiber is added. The furnace cover is used in the case of slightly repaired 594 furnace and service life is 4 times than before.

Article source:
Refractories for electric furnace roof

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Continuous smelting and repair of induction furnace

refractory material for induction furnace
refractory material for induction furnace
1.Continuous furnace
To reduce the repeated heat that caused by quenching furnace lining cracking, continuous smelting is very induction furnace refractory lining materials important for the extension of lining service life, it has caused attention of many users. If can not continuous use, intermediate frequency furnace in after a single use, want to join metals in furnace burden, and cover induction furnace lining material the furnace cover, it can not only give metal furnace material preheating, also can prevent the lining cracks caused by rapid cooling.

2.The Repair
(1) The intermediate frequency furnace Refractory company reach to 20 heats then need to tear down all of my throat opening, purpose is to check whether the furnace lining is drill iron, also check the dry lining loosening clearance. To repair the oven, it is best to use high metal front ring, and pay special attention to the old and new interface cleaned up. During the refractory brick next furnace operation, it should open first time below the fettling interface.
(2) The furnace mouth and throat opening is often slagging, impact erosion and burden, it need constant maintenance and repair, to ensure the normal dimensions of intermediate frequency furnace.

Article source:
Continuous smelting and repair of induction furnace

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2017年7月21日星期五

The Best Refractories for Induction Furnace -- 25+ Heats Silica Ramming Mass

Medium Frequency Induction Furnace Drying Tamp Mass
Neutral ramming mass is used for induction furnace lining with longer service life.

In recent years, silica ramming mass is widely used in induction furnace. Compared with traditional refractory lining materials, this product is of lower cost, shorter sintering time and better working condition.

To offer clients better refractory products, we have successfully developed our 25+ heats silica ramming mass. As per actual working, we summed up the refractory for sale material consumption as following. 1. First heat: 10-15mm 2. Rest heat: 3-5mm

As per our experience, we should leave 70mm as save level. So if the lining thickness is 180/300/450mm, we could promise the least service life of our refractory material to be 25 heats. If the working condition is convenient, 30-40 heats is no problem.

Furthermore, our refractory castable silica ramming mass can also be applied in tundish and ladle. Service life can namely be 48-60 hours/ 200+ heats.

Because of the great advantages as above, our silica ramming mass is very welcomed by our clients all over the world say Bangladesh, Ghana, South Africa, and Indonesia, etc. If more interests, please feel free to make us informed, our professional teams are ready to give you our reliable service. For new clients, we would offer more preferential as following. 1. Lower price trial order 2. Professional refractory technicians overseas service.

Therefore, what are you waiting for? Talk your phone and call us!

Article source:
The Best Refractories for Induction Furnace -- 25+ Heats Silica Ramming Mass

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Factors that affect the service life of induction furnace lining

Intermediate Frequency Induction Furnace Lining Material
This is acidic silica ramming mass premixed with H3BO3, widely used for the lining of Medium Frequency Induction Furnace of iron, steel, copper-aluminum and alloy industry, etc.
1.Lining thickness. As the thickness of lining goes up, the service life will be longer.
2.Tightness of lining. Normally we use puematic tamper for lining, some customers do lining manually, tightness of lining is not so good, so the service life is shorter.
3.Tapping temperature. High tapping temperature leads to short service life.
4.The sintering by the first heat is also critical for a good lining.
5.Scrape quality. If the quality of scrape is bad, it will cause more slag, which is bad for lining.
6.Scrape feeding method. Rough feeding will hurt the lining.
7.Melting time. Normally the melting time is around 1.5 hours, if longer, the service life will be shorter.
8.Try not to use iron scale for decarborization, it is very harmful for the furnace lining material.
9.Remaining thickness and ending frequency. Some customers has certain limits on this two factors, our recommendation is to listen to experienced workers.
10.Lining thickness at slag zone. Different steel plant has different working condition, so the slag zone is not the same, it is better to adjust the thickness at slag zone to increase the service life.
11.Melting better be continuous. If it is not, lining could be break by the force of thermal shock.

Article source:

Factors that affect the service life of induction furnace lining

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2017年7月11日星期二

Refractory materials for different parts of electric ARC furnace(2)

Magnesia Carbon Brick
In order to make balance the damage of the furnace wall and prolong the service life, furnace wall is also used inlaid water cooling box or water cooling measures. The inner surface of the furnace is sprayed with a layer of fire-resistant coating to make the dross form a protective layer, which can reduce the unit consumption of the refractory material. effectively. But the energy consumption is relatively increased.

(3) Refractories for bottom of electric ARC furnace
Knotted lining use good sintered magnesia or fused magnesia, there is working lining and permanent lining under the ramming layer.The working lining use tar pitch bonded magnesium refractory brick magnesia brick, and permanent lining is generally use magnesia brick. The slag line parts upper the dike slag line parts,as slag erosion is serious,now more use the lining brick what same or similar the furnace wall hot spots,such as casting magnesia-chrome brick or re-combination magnesia-chrome brick. The effect is better when use of magnesia carbon brick, the service life can be as high as 100 to 200 furnace times.

The anode end of the direct current electric arc furnace is connected with the contact piece of the furnace bottom, the bottom of furnace use thermal conductivity refractory material or metal components to solve the problem of conduction, the main requirements of the conductive refractory is low resistance (10-4 ~ 10-2 Omega . m) and the resistance must be stable, usually using combination asphalt with resin ,magnesia carbon bricks having a carbon content of preferably 10% to 18% are used as the conductive refractory, and include permanent lining, working lining and a protective coating. Working lining use magnesia ramming compound.

(4) Refractories for taphole
In 1980s, the advantages of tapping port are: The tilting electromechanical equipment has been canceled, the area of the water-cooling wall has been expanded, the damage of lining has been eased, the temperature of tapping steel can be reduced and the time of tapping can be reduced, thus reducing investment and saving electric energy. people use resin-bonded magnesia-carbon brick as taphole bricks, magnesia carbon refractory brick for sale as tube brick, and people use magnesia carbon brick or Al2O3-C-SiC brick as end brick. In order to make the melton steel flow out more successfully, usually people use olivine-based coarse sand as drainage material.

Article source:
Refractory materials for different parts of electric ARC furnace(2)

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Refractory materials for different parts of electric ARC furnace(1)

Refractory materials for electric ARC furnace
Refractory materials for different parts of electric ARC furnace
(1) Refractories for ARC furnace roof
Electric Arc Furnace life refers to the life of furnace roof. After the 1980s, with the expansion of steel-making electric arc furnace capacity and the increase of unit power, the working conditions of the furnace roof become more demanding, the refractories used for electric Arc furnace also changed.

The roof of arc furnace commonly use high alumina brick to masonry, Al2O3 content of between 75% to 85%. Compared with silica brick, the characterized of high alumina brick is high refractoriness, thermal shock resistance, good slag resistance, high compressive strength. Because of its high thermal shock resistance and structural integrity, it is not necessary to produce shaped bricks. There ie a rich bauxite resources in China, high alumina insulating brick has become the main refractory material on Arc Furnace roof, its life is 2 to 3 times of silica brick roof . With the development of large-scale ultra-high-power electric furnace, the service life of high-alumina brick is reduced, Leading to the further use of calcined or not burning magnesia brick and magnesia-chrome brick and other alkaline brick.

(2) Refractories for ARC furnace wall
The furnace wall is divided into general furnace wall, slag line area and hot spot that near the arc . The main furnace wall mainly uses the magnesia brick, the tar pitch combination and the asphalt impregnation burns the dolomite brick and the magnesite refractory brick masonry, also has uses does not burn the magnesia alkaline brick and the asphalt union magnesia and the dolomite ramming material, That all have longer service life. ARC furnace wall which Ultra-high power or smelting special steel used the magnesia-chrome brick and high-quality magnesia brick to masonry.

Slag line area and the hot spot of furnace wall is weak link. As the furnace wall life depends mainly on the degree of damage of hot spot, so the parts of lining should be special attention. the 20th century 70 years ago, the masonry of the site commonly used cast magnesium chrome bricks, combined with or re-combination of magnesia- chrome brick, the service life is 100 to 250 furnace times. Into the 80's, in these parts widely used magnesia carbon bricks
 to masonry, showing that in addition to high temperature and slag resistance performance,service life be significantly improved , the high-power electric arc furnace to more than 300 times in China.

Article source:
http://www.yilongrefractory.com/news/Refractory%20materials%20for%20different%20parts%20of%20electric%20ARC%20furnace(1).html
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2017年6月28日星期三

Development of continues casting & tundish

Refractory Castable
Refractory Castable
CCM first appear in 1950s, it is characterized by fast casting and focus investment. CCM technology was developing in a very fast speed. In Year 1970, CCM only took 5.6% all over the world, refractory brick while the data reached 62.4% in Year 1990, and in some developed countries, it was even 95%. In recent years, many steel plants adapted CCM instead of mould casting. Until Year 1994, in total 24 countries are of full CCM now.

Compared with traditional mould refractory castable casting, CCM can improve metal recycle rate and low down power consumption. CCM can make the melting work simple and short the melting time, in which way the production efficiency can improve in a large degree. Tundish is a middle progress of steel making, and it is the kep point which can decide continues casting or not. Furthermore, tundish would have a big effect on melten refractory material steel quantity and quality. Its functions are as following:

1. Diversion. For multi-strand CCM machine, the melten steel would be divided from tundish.

2. Continues casting. When refractory firebrick multi-furnace continuous casting, tundish can be a holder when changing ladle.

3. Lowing down presure.

4. Protecting melten steel quality. Through using covering agent, long nozzle and other protecting device, tundish can help to protect the melten steel quality.

Article source:
Development of continues casting & tundish

E-mail:sales8@chinaelong.com

2017年6月19日星期一

Basic properties of refractory material for steel making

As we all know that China refractory is of various kinds and is widely used and also of great importance in steel industry. The following are some refractories commonly used in steel industry summarized by Changxing Refractory engineers.

(1) Refractories for converter
Magnesia carbon refractory brickis used for furnace cap, tapping converter mouth, before and after the surface, weld pool and bottom; high strength magnesia carbon brick is used for trunnion and slag line. Usually the MgO content in magnesia carbon brick is 70 ~ 75%, graphite is 16 ~ 20%, bulk density is 2.8 ~ 2.9 g/cm3, compressive strength is 25 ~ 30 MPa. The elements of high strength magnesia carbon brick are the same elements as magnesia carbon fire brick, but its compressive strength should be 30 ~ 42 MPa.

(2) Refractories for electric furnace
Furnace hearth, furnace slope and molten pool are overall rammed with magnesia clinker, or constructed with magnesia brick which is made of magnesia carbon brick and tar asphalt; high-quality MgO-C bricks is used for hot and slag line area; magnesia brick and magnetite chrome brick are used for tapping hole and the two sides of furnace door; high alumina bricks or high alumina brick clay brick are used for furnace cover.

(3) Refractories for UHP EAF
For permanent lining of ultra high power EAF, using magnesium stone; for furnace doorjamb, using magnesia chrome brick; for slag line, eccentric bottom and molten pool, using magnesia refractory firebrick; for hot spots, furnace wall and tapping hole, using magnesite carbon brick; for furnace cover, using high alumina brick; for tapping hole filler, using high ankerite filling material.

According to the working conditions of various steel furnaces, it can be proved that the refractory materials for furnace working circumstance is very bad. Therefore, whatever refractory for smelting are used, it must possess the following properties.
(1) High temperature resistant and high refractoriness.
(2) Erosion and erosion resistance to high temperature molten steel and slag.
(3) The steelmaking furnace works discontinuously, thus requires refractory material with good thermal shock resistance and spalling resistance.
(4) High mechanical strength, can withstand impact of furnace tilting and furnace charge loading with no damage.

Article source:
Basic properties of refractory material for steel making
E-mail:sales8@chinaelong.com

2017年5月24日星期三

Converter magnesia carbon brick

Converter magnesia carbon brick
Changxing Refractory magnesia carbon brick factory is located in the magnesium capital of China, and products with high bulk density and low porosity.
Magnesia carbon brick for converter
Magnesite and graphite as the main refractory raw material for the converter lining made of magnesium carbon refractory material products.
Performance converter magnesia carbon brick with high temperature, slag resistance, good thermal shock resistance, high temperature strength and so on. But its disadvantage is easy to oxidize in use, can be improved by adding antioxidants. Its physical and chemical properties see table.
The main raw material for the production process is fused magnesia or high purity sintered magnesite and high purity graphite. Generally, MgO is larger than or equal to 95%, and the c content in graphite is more than or equal to 94%. With phenolic resin or asphalt as a binder, according to the use of conditions to select the appropriate additives, by ingredients, kneading, molding, heat treatment made after the finished product. (See magnesia carbon brick) used in the smelting process, due to the use of various parts of the converter conditions and damage are different. In order to achieve a balanced corrosion, for different conditions of use of the converter parts, the choice of MgO-C bricks grades and quality are also different.
Furnace mouth, furnace cap parts of the temperature changes drastically, by the slag corrosion is more serious, should use good thermal shock resistance, slag resistance of magnesia carbon brick. Trunnions on both sides in addition to the role of damage when blowing, the surface without covered with slag layer, easy to repair, easy to oxidize the brick. Should be masonry good slag resistance, good oxidation resistance of high quality magnesia carbon refractory brick. Slag line parts and slag long-term contact, by slag corrosion serious, to be masonry and into the direct impact of scrap and molten iron and erosion. Should be used with a strong anti-slag, high temperature strength, good thermal shock resistance of magnesia carbon brick. Hearth, the bottom of the furnace compared with other parts of the erosion of light, the choice of ordinary magnesia carbon brick, when the top and bottom composite blowing technology, especially at the end of CO2, O2 and other gases, the damage is more serious. Should use good oxidation resistance, good thermal shock resistance, high temperature strength, high slag resistance of high-grade magnesia carbon brick. According to the different parts of the converter, the corresponding performance of magnesia carbon brick is to improve the technical indicators of the converter and effective method.

Application of magnesia carbon brick in Converter Lining

magnesia carbon brick
Changxing Refractory is able to manufacture magnesia carbon brick for every ladle, EAF, and BOF. We will design you a well-balanced lining, providing optimal performance at the lowest possible cost. Our magnesia-carbon brick is made from more than 98% electrically fused magnesite, high purity graphite and metallic antioxidants as needed. Size and specification can be tailored according to furnace type. 
In the smelting process, the use of various parts of the converter conditions, damage is different, for different conditions of use of the various parts of the converter, the masonry refractories are not the same.
(1) furnace mouth: As the furnace temperature changes drastically, slag and high temperature exhaust scouring more powerful, and in the removal of scrap and feeding, the furnace was hit, so the furnace for the refractory material must have a high resistance Thermal shock resistance and slag resistance, to resistance to slag and high temperature exhaust scour, and not easy to hang steel and easy to clean.
(2) furnace cap: the furnace cap is the more serious parts of the slag corrosion, but also by the temperature changes, as well as the oxidation of carbon and dust, such as the role of scouring, so the need for strong slag resistance and thermal shock resistance magnesia carbon brick.
(3) Filling side: The splashing of slag and molten steel is easy to cause chemical erosion, abrasion, erosion, and charging on the charging side. It is also affected by the direct impact and erosion of scrap and molten iron Serious mechanical damage, so the requirements of MgO-C bricks in addition to a high slag resistance and a high high temperature strength, but also must have a very good thermal shock resistance, usually by adding antioxidant high-strength magnesia carbon brick.
(4) the steel side: the steel side of the basic damage from the mechanical damage when the thermal shock is also smaller, but by the tapping of molten steel when the thermal shock and erosion, damage faster than the loading side of the small When the same material as the charging side is used, in order to maintain the equilibrium life of the converter charge, we use masonry with a thickness in the form of a thin side.
(5) slag line parts: slag line is the long-term contact with the slag and slag corrosion serious parts, in the tapping side, with the slag position with the tapping time changes, and more obvious. In the slag side, due to the strong impact of the slag erosion and the other effects of the abdomen caused by the abdomen in the process of blowing, the damage is serious, so we need to masonry with good slag resistance of magnesia carbon refractory brick.
(6) trunnion on both sides: both sides of the trunnion in addition to the role of damage when blowing, the surface of the protective layer of the cover, not easy to repair, so the charge material in the carbon easily oxidized, and thus damaged, Excellent slag resistance, high oxidation resistance of high-grade magnesia carbon brick.
(7) hearth and bottom: these parts in the blowing by the severe scouring of molten steel, but compared with other parts of the damage to a more tired, the choice of low carbon content of magnesia carbon brick can also be used tar dolomite brick The When the high-speed blowing and the pool is too shallow, the bottom of the furnace site damage may be serious. In addition, when the use of bottom blowing, these parts of the damage may increase, should be used and the furnace side of the same material.

2017年5月16日星期二

Magnesium Carbon Brick Product Consumption Knowledge

magnesia carbon brick
Changxing Refractory magnesia carbon brick factory is located in the magnesium capital of China, and products with high bulk density and low porosity.
Magnesia carbon brick is a kind of important refractory used in steelmaking converter, steel making electric furnace, steel refining furnace and its ladle as lining (lining). As the erosion resistance, not easy to slag, so the use of magnesia brick can significantly improve the life of steel-making furnace (bag).
MgO-C bricks is the use of high-quality fused magnesia, high purity flake graphite, metal additives and other raw materials, phenolic resin as a binder by high-pressure molding, about 200 ℃ heat treatment made of a refractory products. High quality magnesium carbon brick to ensure the service life and safety, the use of poor quality magnesium carbon brick masonry furnace easy to burn, the occurrence of running steel, leakage of steel, casualties and other vicious accidents, so the procurement must be good Quality off.
The appearance of the black and white carbon brick products, the appearance of oil black shiny, cross-section neat; poor magnesia carbon brick product appearance rough white point, cross-section has a layer, resulting in particle segregation, and particles continue.
magnesite carbon bricks physical and chemical indicators with the naked eye is difficult to judge, the user can randomly send the authority to send the department for quality inspection. GB / T 22589-2008 "magnesium carbon brick" requirements of the physical and chemical indicators are as follows: MgO content, C content, significantly porosity, bulk density, room temperature compressive strength, high temperature bending strength.
Magnesium carbon brick is easy to hydrate, so the MGO brick manufacturers must be kept in the rain, moisture-proof warehouse. Packaging and transportation should also take measures to prevent rain and moisture, the product once the damp, product quality will decline, serious will lead to magnesium carbon brick products scrapped.

What are the processes for the preparation of magnesium carbon brick

magnesia carbon brick
Changxing Refractory is able to manufacture magnesia carbon brick for every ladle, EAF, and BOF. We will design you a well-balanced lining, providing optimal performance at the lowest possible cost. Our magnesia-carbon brick is made from more than 98% electrically fused magnesite, high purity graphite and metallic antioxidants as needed. Size and specification can be tailored according to furnace type.


Magnesium carbon brick is a high melting point of basic oxide oxide (melting point 2800 ℃) and difficult to be slag invasion of high melting point carbon material as raw material, add a variety of non-oxide additives. With carbonaceous binder combination of non-burning carbon composite refractory.

The traditional magnesia carbon brick produced by the synthetic tar binder in the cold mixing process is hardened during the process of tar damage and the necessary strength is obtained, thus forming isotropic glassy carbon. The carbon does not exhibit thermoplasticity, and the thermoplastic properties are eliminated in a large amount of stress during lining or during operation. The bituminous carbon brick produced by the asphalt binder has a high high temperature plasticity due to the formation of anisotropic graphitized coke during the asphalt carbonization process.

Therefore, the use of asphalt combined with the brick crack resistance is higher than the asphalt bonded brick. However, one of the disadvantages of bitumen-bonded bricks is the need for thermal mixing during the production and the provision of a brick mold preheating device. In this paper, the method of making MgO-C bricks  by cold mixing process is described. The resulting bricks have a lower modulus of elasticity so that they act to eliminate stress during operation. Ordinary coal tar pitch is harmful to environmental protection because of the presence of benzophen. The choice of benzene and low content of the special meet the environmental requirements of the binding agent.

In order to improve its oxidation resistance, can be added in the ingredients such as Si powder, Al powder, SiC powder or ferrosilicon powder additives, resin as a binder, high pressure molding, after 200 ~ 300 ℃ treatment can be used without Calcined. Mainly used for large-scale converter and ultra-high power furnace steel lining and furnace refining furnace lining and so on.

With the increase of carbon content, the bulk density and compressive strength of the magnesia-carbon brick are reduced. When the carbon content is between 6% and 8%, the high temperature flexural strength, thermal shock resistance, slag resistance and oxidation resistance of the magnesium carbon brick are good The carbon content is low and the slag resistance of the magnesia carbon bricks manufacturers is reduced. When the carbon content is 14%, the oxidation resistance of the magnesium carbon brick is the worst.

2017年5月10日星期三

Application and formulation of ladle castable

Ladle Castables

Ladle refractory castable is used for the ladle of a refractory castable by adding a certain amount of binder made of amorphous bulk refractory. Ladle is used in steel mills, foundries in the open furnace, electric furnace or converter to undertake molten steel before the casting operation. Ladle refractory castable to magnesia or high alumina spinel-based. Refractory aggregate for the pure magnesia or special bauxite clinker, refractory powder for the magnesium aluminum spinel powder; binding agent for the composite binder, while adding admixtures. This kind of refractory castable has good slag resistance, anti-peeling and thermal shock resistance, compared with the magnesium-aluminum spinel refractory castable, the performance is slightly inferior, the cost is significantly reduced, suitable for national conditions, easy to promote; and Ordinary aluminum and magnesium refractory castable materials , due to the addition of spinel, rather than in the course of the gradual formation of the use, so the performance significantly improved, the cost of the user can accept the extension of life, it is more promising.

Ladle refractory castable selection of high quality bauxite, corundum and high quality magnesia as the main material, the use of composite powder and add some additives from the preparation of a kind of unshaped refractory. Ladle refractory castable its main features are: explosion-proof performance, high temperature strength, resistance to erosion and erosion erosion ability. According to different conditions of use of the preparation of different types of ladle castable points: the general aluminum and Refractory company magnesium castable, slag and Baoshen composite aluminum magnesium castable, high-grade aluminum and magnesium castable, aluminum and magnesium spinel castables and other varieties.

With the requirements of the steelmaking plant production process, the development of continuous casting and furnace refining, so that the molten steel in the ladle residence time is relatively extended, thus accelerating the damage to the lining of the molten steel, resulting in ladle low life, So the need for high-grade high-strength refractory castable. Ladle refractory castable material to high-purity fused steel jade-based materials, the matrix mixed with high purity spinel, and add the right amount of binder, admixture (dispersant, water reducing agent) made. Has a good anti-slag and anti-striatability, high volume stability, strength, sintering time is short. Effectively improve the package age and service life, can be more than eight hundred traditional furnace increased to one hundred and thirty-four furnace.

Ladle refractory castable features:
1. Strong resistance to hot metal and slag erosion;
2. Good thermal shock resistance, small change in burn volume;
3. Strong antioxidant capacity;
4. Easy construction, quick baking without burst, easy to repair and dismantle;
5. When used, do not produce harmful gases, non-stick residue, long life.

we are ladle castable manufacturer in China. our ladle castable price is best. If you need please contact us via E-mail:sales8@chinaelong.com

What are the precautions for ladle castables when they are used and operated

Ladle Castables
Based on low-cement castable and superfine powder technologies, our company developed the series of castables for ladles to meet the operation conditions of various ladles. The castables are made by setting up scientific optimization of ingredients and accurate distributing of grain size as well as adding of high-quality binding agents and high-efficiency external reactants.
1, Refractory material construction with a forced mixer mixing, mixing may not be mixed with bags, rope and other debris, affecting the pouring effect and performance.

2, stir depending on the refractory castable site unpacking, mixing the amount according to the capacity of the mixer, castable should be accurately measured, into the mixer.

3, the first dry mixed with wet mixing process, the castable added to the mixer, dry mixing 2 minutes, add water about 5.2 to 5.5%, while stirring with water, first add 80% of the total, and then depending on the consistency of the situation as appropriate Add (and pay attention to the mixing water must be clean tap water, not sewage), wet mixing 4 minutes, one-time mixing shall not be less than 6 minutes until the insulating castable uniform, the surface of the slurry after the material, in general, When slightly dry, slightly thin wall (the above water for the reference value).

4, stirring to strictly control the amount of water and mixing time, to ensure the consistency required for construction. Castable materials  too thin will seriously affect the quality of material properties. Each time the amount of mixing, mixing time, add water uniform, If you find the mixing material consistency does not meet the requirements, should return to the mixer appropriate water or dry material mixing, is strictly prohibited in the pouring temporary use of water.

we are ladle castable exporter in China. our ladle castable price is best. If you need please contact us via E-mail:sales8@chinaelong.com

2017年5月9日星期二

Ladle Castable, ladle castables, Refractory Castable - Changxing Refractory

Ladle Castables

Ladle Castable, ladle castables, Refractory Castable - Changxing Refractory
Ladle Castable, ladle castables, Refractory Castable - Changxing Refractory
Introduction:
Based on low-cement castable and superfine powder technologies, our company developed the series of castables for ladles to meet the operation conditions of various ladles. The castables are made by setting up scientific optimization of ingredients and accurate distributing of grain size as well as adding of high-quality binding agents and high-efficiency external reactants.

Advantages:
1. Ladle castables show the features of high strength 2. Excellent thermal shock resistance 3. Corrosion resistance 4. High abrasion resistance and refractoriness 5. Stable volume

Application:
The products can be applied for ordinary ladles, refining ladles and ladles of EAF.

Contect source:
http://www.yilongrefractory.com/AllProductOneServlet?id1=2&id=24
E-mail:sales8@chinaelong.com

coil grout, red coil grout, induction furnace refractories, furnace coil grout - Changxing Refractories

Coil Grout

coil grout, red coil grout, induction furnace refractories, furnace coil grout - Changxing Refractories
Introduction and Advantages:
This coil grout is a grouting compound to coat coils in induction furnaces. Coil grout is required to be mixed with water and then applied by trowelling. Coil grout will provide a smooth surface to the slip plane medium, in order to allow uninhibited expansion and contraction of the working lining.

Application:
Coil grout is used as a grouting compound to coat coils in induction furnace.

Contect source:
http://www.yilongrefractory.com/AllProductOneServlet?id1=2&id=23
E-mail:sales8@chinaelong.com

2017年4月25日星期二

Analysis of low cement castables for cement kilns has a strong shock resistance



Not the same product, will bring a different effect, low cement castable cement kiln to bring what effect. Low cement castables mainly bauxite as raw material, high-performance calcium aluminate cement dosage is only 2 to 6%. The main production of ingredients than: brown steel jade 15-24, silicon carbide 6-15, coke 20, white mud 12-16, tar 18-20. Calcium oxide content is low, can reduce the formation of eutectic phase, improve the refractoriness, high temperature strength and slag resistance, for the cement kiln plays a very important role.

The raw materials were dried for 24 hours and then dried at 110 ℃ for 24 hours, respectively, and heat treated at 300 ℃, 500 ℃, 700 ℃, 900 ℃, 1100 ℃, 1300 ℃ and 1500 ℃ for 3h. (PM), linear change rate (PLC), room temperature flexural strength (MOR), room temperature compressive strength (CCS), room temperature wear resistance and thermal expansion coefficient and heat resistance of the samples were measured. Seismic performance. The results show that with the increase of heat treatment temperature, the volume density of low cement refractory castable in cement kiln decreases first and then increases again. The change rate of line decreases first and then decreases The strength of the room temperature and the compressive strength at room temperature increased first and then increased. Cement kiln with low cement castable after 1500 ℃ heat treatment after the wear less than 1300 ℃ heat treatment after the wear and tear.

So that the use of low cement castables in cement kilns has a strong shock resistance. Cement kiln construction qualified rate increased by 2%, punctuality rate also increased by about 6%, it is important that the cement kiln safety factor and service life has been improved greatly, and fully reduce the cost of secondary construction of cement kiln.

What is the role of refractory cement in refractory castables

Refractory castable is made of refractory cement (10% to 15% by weight) and refractory aggregate. Therefore, refractory cement is also an indispensable part, but it also causes a series of properties of refractory castables The decline.
The main reasons for the following reasons:
1, in order to complete the hydration of cement, stirring too much water (10% to 15%) caused by ceramic refractory castable significantly higher porosity, density decreased.
2, calcium aluminate hydrate in the middle temperature stage has a strong dehydration and recrystallization effect, destroying the hard material in the castable structure, so that refractory castable in the temperature stage of the sharp decline in strength.
3, cement binder will be more calcium into the castable, resulting in ceramic refractory castable load softening temperature drop, thermal shock stability performance deterioration. In view of the problem of poor performance of ordinary refractory castable, low cement refractory castable effectively avoids the regret of high temperature performance. The so-called low-cement refractory castables, which contain less than 8% of the cement content, and less than 4% is called ultra-low cement refractory castable. In contrast, the general Refractory company castable above mentioned deficiencies are converted into low cement refractory castable advantage. Its structure is dense. Low porosity, high refractoriness, high softening temperature, high temperature strength, good thermal shock stability. But because of its low cement content, resulting in a long time of condensation, early strength in the winter and low temperature conditions, construction is particularly unfavorable. So in the masonry, to give full attention.

The difference between refractory castable and refractory cement


Refractory Castable

Refractory castable.
A kind of granular and powdered material made of adding a certain amount of binder by refractory material.It has high fluidity and is suitable for forming  refractory material.
Compared with other unshaped refractories, the binder and moisture content are higher, so the flow is better. Their wide range of applications, according to the conditions of use of the materials used and binder to be selected. Can directly cast into a lining Use, and can be made by pouring or stray method made of prefabricated block.
cement
Cement, powdered hydraulic inorganic cementitious material. After mixing with water into the slurry, can be hardened in the air or better hardening in the water, and sand, stone and other materials can be firmly cemented together. Cement is an important building Materials, made of cement mortar or concrete, durable and durable, widely used in civil engineering, water conservancy, defense and other projects.
In the insulating refractory cement plant, the use of castable material is very wide, preheater, kiln tail, three ducts, grate cooler, etc., have to use, according to working conditions, the use of different types of models, There are high aluminum anti-alkali, anti-crust, wear-resistant, and spray pipe dedicated, many kinds.

2017年4月17日星期一

The function and application of casting powder

Since the beginning of the 60s 20th century, the first time using submerged nozzle and casting powder, casting powder technology has been highly developed. Different casting powder adapted to different slab section, steel and casting process was developed. The surface quality of the billet is greatly improved and the surface of the slab is gradually improved. The basic functions of mold powder are: to protect the mold meniscus molten steel from the secondary oxidation of air; has good spread performance and thermal insulation properties, to prevent the molten steel surface solidification or crust; can absorb the float to Meniscus non-metallic inclusions;   .........................

If you want to know more about casting powder, please click :
http://www.yilongrefractory.com/news/The%20function%20and%20application%20of%20casting%20powder.html
E-mail:sales8@chinaelong.com

2017年4月5日星期三

Analysis of Refractory Sintering Process of Core Furnace

Industrial furnace iron liquid treatment, sensor removal and docking of this work for the sensor replacement of the core part of its quality and progress related to the success of the entire construction. The temperature of the furnace refractory lining can not be reduced to below 80 ℃ during the quick change process, otherwise the lining will be cracked to affect the life of the entire lining. Therefore, in ensuring the quality of construction under the premise of the progress must be. In addition, the throat cleaning is particularly important, the electric furnace throat should be as far as possible to remove the original size; docking surface of the slag must be clean, to ensure that the opposite paste Yan, or easy to lead to the interface of leakage of molten iron. To empty all the molten iron from the throat, you should protect all the hose in the pit to prevent being burned.
When the resumption of transmission for the sensor refractory material sintering, melting solid iron mold temperature reaches the left and right, that is, iron began to melt, should be injected into the furnace iron injection, or there may be broken. So the melting of the 5 - 8t molten iron in addition to the normal process by the cupola to provide, but also should be emergency prepared. If the furnace temperature measurement of the thermocouple accidental damage, should be based on changes in the coil current to determine when the liquid into the liquid, because the melting mold temperature exceeds the magnetic transition point 70 ℃ (Curie point), the cast iron organization Of the ferrite that becomes non-magnetic, the magnetoresistance increase map, according to the transformer principle, will lead to coil current surge, this time can be injected into the molten iron. The site should be prepared enough of the trough, in the new sensor for leakage of molten iron or broken trench accident, the electric furnace filled with molten iron (for 30t with a core furnace, the furnace will be up to 45t molten iron) To save the furnace refractory lining and equipment to prevent accidents to expand and reduce losses.

2017年3月14日星期二

Mechanical Analysis of Ceramic Thermal Insulation Board in Boiler Insulation

In order to solve the boiler and coal load and load adaptability, according to the boiler required by the minimum stable load and coal characteristics, based on the two or three insulation products board laminated structure adjustable adjustable combustion zone.

Each group of adjustable fuselage device mainly consists of inner, middle and outer three layers of insulation board, each insulation layer by the microporous ceramic insulation board using embedded method and heat-resistant steel structure of the integrated structure of the insulation board The

Ceramic insulation refractory fiber board ceramic fiber paper directly exposed to the flame, the steel structure from the heat-resistant flat steel or angle welded together, from the flame directly. The heat-resistant side of the ceramic insulation board is processed into a smooth plane, and the back-fire side is a microporous structure layer, and its pore density can be controlled between 0.5 and 2.0 mm by the foaming manufacturing process.

Due to the use of embedded structure, under normal circumstances, ceramic insulation board from external force, and therefore its strength is not high. The friction of the entire insulating castables layer and the friction in the movement of friction by the steel structure of the insulating castable refractory layer, therefore, the entire adjustable combustion belt design requirements to ensure that: in the furnace conditions, each activity of the insulation layer of steel The actual operating temperature does not exceed its permissible long term operating temperature limit and requires sufficient strength margin.

2017年2月5日星期日

Why do refractory castables with mobility

Castable is a very wide range of refractory material, for its extensive use mainly because of its performance advantages, and significant features, we may be able to understand, it has a certain liquidity, it is because of the What, where Xiaobian to tell why the castable materials with liquidity.


The refractory castable is a kind of granular and powdered material made of refractory material, which is composed of a certain amount of binder and water.It has high fluidity, suitable for construction by pouring method and can be hardened without heating. It is made up of refractory aggregate, powder, binder, admixture, water or other liquid materials.It is usually cast in the field by casting, vibration or tamping, and can also be used as preform.

2017年2月4日星期六

How to extend the service life of medium frequency induction furnace

To extend the life of induction furnace is the only pursuit of each casting, but there are also the significance of the enterprise. The main factors affecting the service life of the intermediate frequency furnace include refractory lining and furnaces in the paving process, the furnace construction process, the baking process and the use process. The following highlights the introduction of two aspects.

Furnace lining lining refractories refractory material quality and performance of the refractory furnace has a vital impact on the life of the furnace. Therefore, they must meet the following requirements.

1. First, the furnace refractory must have good performance. First of all, refractories need to have a relatively high refractoriness to resist heat loads at high temperatures and will not be softened and melted. Second, at the same time, in order to resist the high temperature heat load, they must have high capacity stability. It must therefore be realized that its volume will not shrink, even if inflation is only allowed to exist. Third, they must have relatively high atmospheric temperature strength and high temperature thermal strength and high enough load, for this purpose this force is still in the high temperature of the heat load and heavy load which does not interact with creep and folding. Fourth, it is required to have good thermal shock resistance to resist severe temperature changes and cracks or not appear. In addition, a good slag resistance is also required.

2. Refractory content. Impurities Refractory company products will form refractory compounds with low refractory refractory properties when the temperature is high. The impurity content in the refractory material increases, and the service life of the furnace is shortened. Therefore, it is necessary to ensure that the quartz content and impurity content in the furnace sand must be strictly controlled.

3. Particle size of the refractory fraction. Reasonable particle size fractions make the Hall of Fame postpone high-density coatings very easily during furnace construction in the form. Therefore, the defect is not easy to appear in the course of using. Paving the quality of the furnace furnace life and the importance of safe intermediate frequency electric furnace. First of all, check whether there is damage to the coil paving, heat treatment furnace front. If it does not exist, repair it by painting the damaged portion of the varnish. Stir the refractory clay with water glass, equivalent to the furnace wall, and then clean the furnace wall and floor. Third, has spread the pre-sheared mica plate, alarm stainless steel mesh and asbestos cloth. Fourth, the stainless steel wire mesh with copper core and pierce it from the furnace coil. Next, use three piston rings to tighten the bottom, middle and top asbestos cloths laid on the furnace wall. Finally, cover the furnace after paving to prevent debris fall into it.

2017年1月12日星期四

Analysis on Product Characteristics and Classification of Mullite Insulating Bricks


Mullite insulation brick is mullite (3Al2O3 · 2SiO2) as the main phase of the high-alumina refractories. General alumina content of 65% to 75%. Mineral composition In addition to mullite, which contains the lower alumina also contains a small amount of glass phase and cristobalite; containing higher alumina also contains a small amount of corundum. Mullite insulation brick can be directly used for high temperature furnace lining, has been widely used in shuttle kiln, roller kiln, glass and petrochemical furnace lining.

First, the mullite insulation brick product features:
1, low thermal conductivity, with good insulation effect;
2, mullite insulation brick low melting, due to low thermal conductivity, mullite series of lightweight insulation brick accumulation of little heat energy, intermittent operation in the energy-saving effect is obvious; 3, impurity content is very low, Metal and other oxide content, therefore, high refractoriness; higher aluminum content in the reducing atmosphere to maintain good performance;
4, mullite thermal insulation brick high pressure strength;
5, the appearance of accurate size, speed up the masonry speed, reducing the use of refractory material mud to ensure the strength and stability of masonry, lining to extend the life;
6, mullite insulation brick can be processed into a special shape. To reduce the number of brickwork and joints.
Second, the mullite insulation brick classification: mullite insulation brick according to the density of different light and heavy mullite bricks, according to the use of different temperature is divided into: 1350 mullite insulation brick, 1450 mullah Stone insulation brick, 1550 mullite bricks and so on. Mullite insulation brick performance and its application: high refractoriness, up to 1790 ℃ or more. The softening start temperature of the load is 1600 to 1700 ° C. Room temperature compressive strength of 70 ~ 260MPa. Thermal shock resistance is good. There are sintered mullite bricks and fused mullite bricks. Sintered mullite brick to bauxite clinker as the main raw material, adding a small amount of clay or bauxite as binder, by molding, firing and made. Fused mullite bricks to high bauxite, industrial alumina and fireclay refractories as raw materials, by adding charcoal or coke fine particles as a reducing agent, forming after the use of reduced melting method to manufacture. The fused mullite is more crystalline than the sintered mullite and has better thermal shock resistance than the sintered product. Their high temperature properties depend mainly on the alumina content and the homogeneity of the mullite phase with the glass distribution. Mainly used for hot stove top, blast furnace and the bottom of the furnace, glass furnace regenerator, ceramic sintering kiln, oil cracking system, such as dead angle lining.

2017年1月11日星期三

Analysis on firing method of mullite refractory brick

Mullite bricks are sintered mullite bricks and fused mullite bricks.
Mullite Insulating Firebrick refractoriness higher, up to 1790 ℃ or more. The softening start temperature of the load is 1600 to 1700 ° C. Room temperature compressive strength of 70 ~ 260MPa. Thermal shock resistance is good.

Mullite bricks are sintered mullite refractory brick and fused mullite bricks. Sintered mullite brick to bauxite clinker as the main raw material, adding a small amount of clay or bauxite as binder, by molding, firing and made. Fused mullite bricks to high bauxite, industrial alumina and refractory clay as raw materials, by adding charcoal or coke fine particles as reducing agent, forming after the use of reduced melting method to manufacture. The fused mullite is more crystalline than the sintered mullite and has a better thermal shock resistance than the sintered product. Their high temperature properties depend mainly on the alumina content and the homogeneity of the mullite phase with the glass distribution. Mainly used for hot stove top, blast furnace and the bottom of the furnace, glass furnace regenerator, ceramic sintering kiln, oil cracking system, such as dead angle lining.

Solutions to improve service life of ladle slide gate plate

slide gate plate Slide gate plate  is the most important part among the slide gate nozzle system, which directly control the flow of the...