What is Castable

Castables are mainly divided into castables for ordinary construction and refractory castables for high-temperature kilns. It is an amorphous material. Ordinary castables for building buildings usually refer to materials poured into the construction of building walls. They are usually not It has refractory properties, and refractory castable is a type of castable used in the construction of high-temperature kiln linings. There are many types of castables. Today, the editor will take you to understand what refractory castables are.

Refractory castables are usually composed of refractory aggregates, powders, and binders, but sometimes to improve the fire resistance of refractory castables, we also add various refractory raw materials, such as stainless steel fibers, inorganic fibers, corundum, etc. Special refractory materials are used to improve the refractory properties of the castables to ensure that they can work normally during the operation of high-temperature furnaces.

There are many types of refractory castables. Generally, there are two main types during the use of high-temperature kilns. One is lightweight insulation castables, and the other is heavy refractory castables. Lightweight insulation castables are divided into clay-based and high-aluminum based on raw materials, such as lightweight acid-resistant castables, lightweight alkali-resistant castables, etc. There are many types. We generally look at the aluminum content and density when distinguishing. Heavy refractory castables are divided into clay, high alumina, and corundum based on materials, such as corundum castables, chrome corundum castables, high alumina cement, etc. They are generally used as kiln linings such as blast furnaces hot blast furnaces and heating furnaces. of masonry.

Refractory castables also have good hot spots such as good high-temperature performance, low impurity content, high bonding strength, wear resistance and corrosion resistance, long service life, non-toxic and non-polluting, etc., so their use in high-temperature industries can be said to be very common. , the application range is also very wide, such as the steel industry, cement industry, power generation industry, coal industry, metallurgical industry, chemical industry, and other occasions, and different types of refractory castables are used in different parts of the kiln. We must use them according to the use the location to select.