What material is used for the lining of the intermediate frequency furnace?

The intermediate frequency furnace lining is also called the intermediate frequency furnace charge, the intermediate frequency furnace dry vibrating material, the intermediate frequency furnace dry ramming material, etc. It is divided into acid, neutral and basic furnace linings. , the composite additive is the sintering agent. The neutral furnace lining is made of alumina and high-alumina materials as the main raw materials, and the composite additive is used as the sintering agent. The basic furnace lining is made of high-purity fused corundum, high-purity fused magnesia and high-purity tip The spar is the main raw material, and the composite additive is used as the sintering agent.

Refractory materials for intermediate frequency furnaces are divided into three types: acid, neutral and alkaline according to their properties. They are divided into dry ramming materials, wet ramming materials, castable materials and smear materials according to the construction method. The main raw materials of common furnace lining materials are: When the carcass and furnace lining are mainly made of quartz sand. The raw material is of high purity, the raw material ratio is reasonable, the corrosion resistance of molten iron is strong, the cold and heat resistance is strong, the softness is high, the impact resistance is strong, the load softening temperature is high, and the high temperature compression resistance High strength, high high temperature flexural strength, good slag resistance, especially suitable for batch operation of large medium frequency induction furnace.

But it does not mean that all intermediate frequency furnace lining materials can successfully complete the task under the action of high temperature, which requires strict requirements on materials from various aspects to ensure that there will be no problems in the process. In the process of reproduction In order to save costs, many manufacturers will prepare their own raw materials, so that there will be problems such as wear through the furnace and low furnace age during use, resulting in insufficient output and serious damage to the electric furnace. This is not desirable.

So, what kind of lining material is qualified and excellent?

Alkaline furnace lining: mainly used for melting high alloy steel, carbon steel, high manganese steel, high chromium steel, tool steel, stainless steel and other alloy steels.

Acid lining: The working lining of a coreless induction furnace, mainly used for melting and holding cast iron.

Acidic, neutral and basic furnace linings are widely used in coreless intermediate frequency furnaces and induction furnaces. As a lining material for intermediate frequency furnaces, they are used to smelt gray cast iron, ductile iron and cast iron alloys, carbon steel, alloy steel, high manganese steel, tools Steel, heat-resistant steel and stainless steel, aluminum and its alloys, copper alloys such as red copper, brass, cupronickel and bronze, etc.