Characteristics of intermediate frequency furnace lining materials

When the intermediate frequency furnace lining is smelting, the high temperature of the molten steel can reach 1700 degrees, and the high temperature of the molten iron can reach more than 1500 degrees. Therefore, it is necessary to select the intermediate frequency furnace lining material that can meet the melting temperature according to the melting temperature of the metal to be smelted.

1. Outstanding chemical stability

Slag corrosion is a common damage form of refractory materials in the use process, such as intermediate frequency furnace lining, ladle working lining, cupola furnace lining damage from the lower part of the furnace body to the hearth, mostly caused by this effect. In actual use, about 59% of the damage is caused by the corrosion of slag. Slag resistance is the ability of a refractory to resist the corrosion and erosion of slag at high temperatures.

When selecting refractory materials, try to choose refractory materials with similar chemical composition to slag to weaken the reaction strength on their interface. For example, when melting high manganese steel, the lining material should choose basic refractory materials, etc.; or try to change the composition of slag to make it Approaching the refractory composition used is also one of the ways to improve the slag resistance of the refractory.

2, the thermal conductivity should be small, and the electrical conductivity should be low

During the smelting process of the intermediate frequency furnace lining, the temperature difference between the inside and outside of the furnace wall is very large, and about 10%-15% of the heat is lost through the furnace wall. The lining material must have low electrical conductivity and cannot contain magnetic induction substances, especially during the knotting process of the furnace lining, metals or substances with strong electrical conductivity are not allowed to be mixed into it.

3, accustomed to environmental protection requirements

The furnace lining material does not release substances that are toxic, harmful and polluting the environment during the use of the furnace lining material, and the waste after use cannot cause harm to the environment.

4, cost-effective

According to the smelted materials and requirements, choose cost-effective materials. It can save costs and use suitable and safe furnace lining materials.

After the above description, I believe that everyone also has a certain understanding of the selection of intermediate frequency furnace lining. A good furnace lining material must have high refractoriness, good chemical stability, and good thermal shock resistance. Changes, do not crack, do not peel; there are also small thermal conductivity, low electrical conductivity, and environmental protection requirements, etc. It can be used as a reference when selecting an intermediate frequency furnace in the future.