Refractory Materials Used in Steel Rolling Heating Furnaces and Precautions

Steel rolling heating furnaces usually use high refractory materials to withstand high temperature and thermal cycle environments to ensure that the heating process in the furnace is stable and continuous. The following are some common refractory materials used in steel rolling heating furnaces and related precautions:

Refractory bricks: Refractory bricks such as high alumina bricks, quartz bricks, and silicon carbide bricks are often used inside rolling steel heating furnaces because they have good high-temperature resistance and chemical stability. Take care to select refractory bricks that are suitable for specific operating conditions, as different furnace temperatures and thermal cycle requirements may vary.

Refractory insulation: Refractory ceramic fibers or graphite fibers are often used as linings or insulation to reduce heat loss and improve energy efficiency. These fibrous materials can maintain their insulating properties at high temperatures but require careful handling to prevent the fibers from fraying and drifting.

Refractory coatings: Some refractory coatings can be used to protect furnace walls and bottoms to increase the life and performance of the refractory materials. These coatings can increase the wear and corrosion resistance of the surface.

Precautions:

a. Temperature control: Ensure that the temperature and heating process in the furnace are well controlled to avoid exceeding the tolerance range of the refractory material, thereby extending the service life of the refractory material.

b. Thermal cycles: There are high temperatures and rapid thermal cycles in steel rolling heating furnaces, which may cause thermal stress. When selecting refractory materials, consider their thermal expansion properties and thermal stress resistance.

c. Maintenance and inspection: Regularly check the condition of the refractory materials and replace damaged or worn parts in time to ensure the safety and efficiency of the furnace.

d. Chemical environment: Understand the chemical corrosion factors that may exist during the heating process, and select refractory materials that can resist these corrosions.

In short, it is crucial to select appropriate refractory materials and correct maintenance measures in steel rolling heating furnaces to ensure that the high-temperature heating process in the furnace can be carried out stably and reliably while extending the life of the equipment.