Anti-peeling high-alumina brick and the difference between ordinary high-alumina brick

Refractories are widely used in metallurgy, building materials, chemicals, petrochemicals and machinery manufacturing and other industrial areas, play an active role in the national economy. However, the application of refractory in high-temperature furnace evaluation, in addition to improving the service life, lower kiln energy consumption, it should also contain refractories in the production process of their own energy-saving, that is selected in the production of low-temperature firing, the product has the appropriate Of the high-temperature characteristics and low thermal conductivity.
In this case,
Compared with the traditional high alumina brick, the thermal shock resistance is high, the strength is high, the chemical resistance is low, the coefficient of thermal expansion is low, the thermal conductivity is low, the firing temperature is low, and the material function is greatly improved. Consumption.
In this case,
From the following aspects to clarify the problem.
In this case,
First, the lower firing temperature 150 ~ C. Because of high temperature firing and insulation, especially in greater than.

Development of Ladle Lining Refractory Materials

20th Century 50--70 years, China's steel plants mainly used aluminosilicate refractory materials, including clay, alumina brick and so on. Since the 1980s, China has successively developed the aluminum-magnesium carbon, coal quality calcium and magnesium and other several series of new steel package refractories. Wherein the aluminum-magnesium carbon refractory materials are of varieties, all specifications, is China's major ladlerefractories.
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Article source:
http://www.yilongrefractory.com/news/Development%20of%20ladle%20lining%20refractory%20materials.html

Influence of LF Refining Slag Adjustment on Ladle Refractories and Refining Effect

In order to take with the problem of serious erosion of ladle lining during the desulfrization of LF refining, LFrefining slag was adjusted and calcium aluminate system substituted fluorine free refining slag with fluorine. After the adjustment of the slag, the erosion conditions on ladle were improved greatly and refining number, refining ratio and remaining lining thickness after demolishing all increased substantially. 
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http://www.yilongrefractory.com/news/Influence%20of%20LF%20refining%20slag%20adjustment%20on%20ladle%20refractories%20and%20refining%20effect.html

Molding methods of refractories and widely used refractories

There are many refractory material molding methods, such as common molding method, vibration extrusion method, extrusion method, pounding method and so on.

At present, when it comes to the production of refractory materials, the most frequent way of molding refractory material is machine pressure molding method which is a way using brick molding machine and mold to compress the clay material into body. because the clay contains 5% water it is called semi-dry molding method. Machine molding is with compact structure, high strength, narrow drying and firing way, and size is also easy to control. It can be divided into the single side pressure, and double sides pressure which can reduce the phenomenon of layer density.

The common refractory material are AZS brick, corundum brick, magnesite chrome brick, directly silica carbide, silicon carborundum brick, nitrides, silicides, sulfide, boride, carbide and other non oxide refractories materials; Calcium oxide, chromium oxide, aluminum oxide, magnesium oxide and so on.

http://www.yilongrefractory.com/news/Molding%20methods%20of%20refractories%20and%20widely%20used%20refractories.html

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

1. Good corrosion/erosion resistance 2. High temperature performance 3. Longer service life 4. Stable structure 5. Thermal shock resistance

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 selectingrefractory brick for sale 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 nozzle refractory 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 brick. 

(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 refractory fiber felt 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.

Bottom Frame & Skid Platform Brick for Heating Furnace

 Bottom Frame & Skid Platform Brick for Heating Furnace

Introduction:

Skid and platform brick are with brown corundum and high grade bauxite as raw materials, using low cement technology and additive. Casting moulding and baking at low temperature, or casting on-site are both available. Characterized by high strength, water and corrosion resistance, they are used for isothermal bed and furnace doorframe of continuous heating furnace and have good effect.

Specific Application: Used for isothermal bed and furnace doorframe of continuous heating furnace.

Service Life: 24 months MIN.

Payment Terms: L/C, T/T

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