Refractory Materials Used In Steel Mills

Refractory materials used in steel mills are key materials to ensure the stable operation of smelting equipment such as blast furnaces and converters under harsh environments such as high temperature, chemical erosion, and mechanical wear. These materials usually have high-temperature stability, good slag resistance, thermal shock resistance, and certain mechanical strength. The following is a brief introduction to commonly used refractories in steel mills:

Main types

1. Siliceous refractories: With silicon oxide as the main component, it has high refractoriness and good resistance to acidic slag erosion, and is often used in the bottom and hearth of blast furnaces.

2. Alumina silicate refractories: such as high-alumina bricks, which have excellent refractoriness and slag resistance due to their high alumina content, and are widely used in the lining of blast furnaces, hot blast furnaces, and converters.

3. Magnesia refractories: including magnesia bricks, magnesia carbon bricks, etc., have extremely high refractoriness and good resistance to alkaline slag erosion and are one of the main materials for converter linings.

4. Carbon refractory materials: such as graphite products, due to their extremely high refractoriness and good thermal conductivity, are important in high-temperature areas such as the bottom and hearth of blast furnaces. However, attention should be paid to their weakness of being easily oxidized, and protective measures should be taken.

5. Amorphous refractory materials: such as castables, ramming materials, etc., have the advantages of convenient construction, good integrity, and strong thermal shock resistance. They are widely used in the repair and new lining of blast furnaces and converters.

Application Characteristics

High-temperature stability: Refractory materials need to be able to maintain structural stability in the high-temperature environment of steel smelting, without softening or melting.
Slag resistance: It needs to have good resistance to slag erosion to extend the service life of the lining.

Thermal shock resistance: When the temperature changes sharply, it can maintain the integrity of the structure without cracking or peeling.
Mechanical strength: It needs to have a certain mechanical strength to withstand the wear of furnace charge and gas movement.

Selection Principles When selecting refractory materials for steel mills, it is necessary to comprehensively consider factors such as the smelting process, equipment structure, furnace lining location, and working environment, and select appropriate material types and specifications. At the same time, it is also necessary to pay attention to the quality stability and production cost of the materials to ensure the smooth progress of smelting production and maximize economic benefits.

In summary, there are many types of refractory materials used in steel mills, each with its characteristics, and the selection needs to be comprehensively considered according to the specific situation.