Refractory materials used in electric furnace cover

The electric furnace cover (also known as the triangle area of ​​the electric furnace top) is not only subjected to high temperature, but also often subjected to rapid cold and rapid heat, so it not only needs to be resistant to high temperature, but also needs to have a certain degree of thermal shock resistance. Generally speaking, the degree of volume change of a substance due to temperature changes is closely related to the thermal expansion coefficient, thermal conductivity, elastic modulus, and inherent strength of the substance. The smaller the thermal expansion coefficient, the greater the thermal conductivity, and the elastic modulus. The larger and the higher the inherent strength of the material, the better the thermal shock resistance. Choosing the right material to produce the electric furnace cover is not only related to the life of the furnace cover, but also affects the output of the electric furnace production.

(Picture 1 Electric furnace top prefab)

The refractory materials used in electric furnace covers in my country include spinel with low expansion coefficient into the material, zirconia is added to mullite and other materials to make use of its phase change to toughen, and steel fiber is added. In recent years, my country has developed various refractory castables to meet the needs of the development of ultra-high-power electric furnaces, such as corundum spinel castables, corundum mullite castables and so on. The integral cast furnace cover uses refractory prefabricated blocks in the triangle area of ​​the electric furnace cover. The main materials are corundum, chromium corundum, high aluminum, and mullite.

(Picture 2 Electric furnace top)

Luoyang firstfurnace@gmil.com Co., Ltd. specializes in the production of electric furnace top prefabs, prefabricated with high-performance ultra-low cement castables, with high cold and hot strength, good thermal shock stability, long life, steel slag and high temperature airflow resistance Erosion, resistance to high temperature arc radiation, resistance to air abrasion caused by high-speed dust extraction in the furnace, etc. For the electric furnace cover, our company has a complete set of mature solutions, which are fully customizable, suitable for ordinary electric furnaces, ultra-high power electric furnaces, refining furnaces and VD furnaces.