What are the refractory bricks for blast furnace

Blast furnace is one of the most important equipment in the metallurgical industry, used to produce iron and steel. The internal temperature of the blast furnace is as high as 1500 degrees Celsius, which has high requirements for refractory materials. Therefore, there are many types of refractory bricks used for blast furnaces. Here are some common refractory bricks for blast furnaces.
1. Silicate refractory bricks: mainly made of silicate materials, with good compressive strength and wear resistance, suitable for the upper and middle furnace walls and roofs of blast furnaces.
2. High-alumina refractory bricks: mainly composed of high-purity alumina powder and alumina mortar, with excellent corrosion resistance and high temperature resistance, suitable for the lower part of the blast furnace and surrounding areas, such as furnace walls, furnaces Bottom, slag mouth, etc.
3. Silicon carbide refractory brick: made of silicon carbide, it has good high temperature strength and corrosion resistance, and can withstand high temperatures above 1800 °C. Suitable for furnace hearth, furnace throat and other parts under high temperature.

4. Silicon refractory bricks: high-quality refractory bricks are mainly made of silica and silicon materials, which have excellent high temperature resistance, acid and alkali corrosion resistance and thermal shock resistance.
5. Mullite refractory bricks: Mullite refractory bricks are mainly composed of mullite, feldspar, silica and other raw materials, and have good high temperature resistance, thermal shock resistance, anti-skid and anti-wear properties.
6. Alumina carbon refractory bricks: mainly made of alumina and carbonaceous raw materials, with high temperature resistance, corrosion resistance and oxidation resistance.
7. Unshaped refractory material: It is usually made of cement, mortar and other materials. It has good refractory performance and construction performance, and is suitable for various corners and difficult-to-lay parts of blast furnaces.
These refractory bricks for blast furnaces have their own characteristics and advantages in different application environments. When selecting them, you need to choose according to the actual situation, and pay attention to ensuring the use effect and safety.