Refractory materials used in iron and steel plants are the key materials to ensure the stable operation of furnace, converter and other smelting equipment under the harsh environment such as high temperature, chemical erosion and mechanical wear. These materials usually have high temperature stability, good slag resistance, thermal shock resistance and a certain mechanical strength. The following is a brief introduction to refractory materials commonly used in steel plants:

I. Main types

1. Silica refractory: with silicon oxide as the main component, it has high refractoriness and good acid slag erosion resistance, and is often used in the bottom of the blast furnace, the furnace cylinder and other parts.

2. Aluminum silicate refractory materials: such as high aluminum bricks, because of its high alumina composition and excellent fire resistance and slag resistance, widely used in blast furnaces, hot blast furnaces and converter lining.

3. Magnesia refractory materials: including magnesia brick, magnesia carbon brick, etc., with extremely high refractoriness and good resistance to alkaline slag erosion, is one of the main materials of converter lining.

4. Carbon refractories: such as graphite products, because of its extremely high refractoriness and good thermal conductivity, it has important applications in high temperature areas such as blast furnace bottom and furnace cylinder. However, it is necessary to pay attention to its vulnerability to oxidation and take protective measures.

5. Amorphous refractory materials: such as castable, ramming materials, etc., with the advantages of convenient construction, good integrity, strong thermal shock resistance, etc., widely used in blast furnace, converter repair and new furnace lining.

Second, application characteristics

High temperature stability: refractory materials need to be able to maintain structural stability in the high temperature environment of iron and steel smelting, without softening and melting.

Slag resistance: It is necessary to have good resistance to slag erosion to extend the service life of the lining.

Thermal shock resistance: when the temperature changes rapidly, it can keep the structure intact without cracking or peeling.

Mechanical strength: It is necessary to have a certain mechanical strength to withstand the wear of the charge and gas movement.

When selecting refractory materials for iron and steel plants, it is necessary to comprehensively consider the smelting process, equipment structure, furnace lining parts and working environment and other factors, and select the appropriate material type and specifications. At the same time, it is also necessary to pay attention to the quality stability of materials and production costs to ensure the smooth progress of smelting production and maximize economic benefits.

To sum up, there are many kinds of refractory materials used in steel plants, each with its own characteristics, and the selection needs to be comprehensively considered according to the specific situation.