Blast furnace ironmaking is a traditional iron and steel manufacturing process that takes place at high temperatures and in harsh environments. Therefore, the selection of suitable refractory materials is crucial to the smooth running of blast furnace ironmaking. Fireramo will introduce refractory materials for blast furnace ironmaking and their characteristics.

Clay bricks

Clay brick is one of the most common blast furnace refractories, which has good thermal stability and chemical erosion resistance. Clay brick is made of clay as raw material, after mixing, pressing, drying and firing. It has the advantages of low cost and easy production, and is suitable for various blast furnace ironmaking processes. However, the strength and erosion resistance of clay bricks are relatively poor and require frequent maintenance and replacement.

High Alumina Brick

High alumina brick is a kind of refractory material with alumina as the main component, which has high temperature strength and good erosion resistance. The advantages of high alumina bricks are that they have high refractoriness and good erosion resistance, and they are suitable for areas such as the high-temperature zone of blast furnaces and furnace cylinders. However, the cost of high alumina bricks is higher and the production process is more complicated.

Silicon Carbide Brick

Silicon carbide brick is a kind of refractory material with silicon carbide as the main component, which has high-temperature strength, oxidation resistance and wear resistance. The advantage of silicon carbide brick is that it has excellent resistance to high temperature and chemical erosion, and it is suitable for high-temperature areas such as the head and roof of the blast furnace. However, the cost of silicon carbide bricks is higher and the production process is more complicated.

Corundum Brick

Corundum brick is a kind of refractory material with alumina as the main component, which has high-temperature strength, erosion resistance and abrasion resistance. The advantage of corundum brick is that it has high refractoriness and good erosion resistance, and it is suitable for areas such as the belly and cylinder of blast furnace. However, corundum bricks are more costly and the production process is more complicated.

Magnesium refractory

Magnesium refractory is a kind of refractory material with magnesium oxide as the main component, which has high temperature strength, erosion resistance and abrasion resistance. The advantage of magnesium refractories is that they have excellent resistance to high temperature and good resistance to chemical erosion, and they are suitable for areas such as the cylinder and bottom of the blast furnace. However, magnesium refractories are easy to absorb water, and need to strictly control the production and use of the environment.

There are various choices of refractories commonly used in blast furnace ironmaking, which need to be selected according to the specific working conditions and requirements of the blast furnace. Clay bricks, high alumina bricks, silicon carbide bricks, corundum bricks and magnesium refractories all have their own advantages and scope of application. When selecting refractory materials, it is necessary to consider their performance indexes such as high-temperature strength, erosion resistance and abrasion resistance to ensure the smooth running of the blast furnace ironmaking process.