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.

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

In recent years, silica ramming mass is widely used in induction furnace. Compared with traditional refractory lining material, 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 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 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? Take your phone and call us!

Intermediate Frequency Induction Furnace Lining Material

Intermediate frequency furnace ramming material

Intermediate frequency furnace ramming material has many names, including dry ramming material vibration of intermediate frequency furnace, medium frequency furnace lining materials, intermediate frequency furnace refractory material, and intermediate frequency furnace dry vibration material. All those names are saying the same refractory product, and the properties and usage of all of them are the same. Intermediate frequency furnace ramming material refers to a kind of unshaped refractory products which are applied in the method of ramming (by human or machine), and then becomes hard in heating.

According to chemical properties, ramming material can be divided into acidic, neutral and alkaline ramming material. Acid intermediate frequency furnace ramming material is mainly made from high purity quartz and fused silica. During composite period, sintering agent uses composite additive as main material. Neutral intermediate frequency furnace ramming material uses alumina, high alumina material as main raw materials, it also uses composite additive as sintering agent. What makes alkaline ramming material different from the above two kinds of ramming materials is that its main raw materials are high purity fused corundum, high purity fused magnesia and high purity spinel. And also it uses composite additive as sintering agent. The above three kinds of ramming materials which are acidic, neutral and alkaline intermediate frequency furnace ramming materials are widely used for coreless intermediate frequency furnace and cored induction furnace.

Intermediate frequency furnace ramming material is used for melting of cast iron, ductile iron, forging cast iron, vermicular cast iron and cast iron alloy, carbon steel, alloy steel, high manganese steel, tool steel, heat-resistant steel, stainless steel, aluminum and its alloy, copper, brass, copper nickel alloy and bronze copper alloy, etc.