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What Is A Refractory Castable
May 24, 2018

Refractory castable is a mixture consisting of refractory aggregate, binder and admixture, and water (or liquid binder) is blended into usable pouring method. The difference with other amorphous refractories is that the refractory castable has a certain setting and hardening time after construction, so after pouring, it needs to be put into baking after a certain time of curing and then after a proper time of natural maintenance.

The refractory castable is a mixture of refractory aggregate, powder and binder. After adding water or other liquid, it is suitable for pouring, vibrating and prefabricated preforms with specified shape and size. It is used to build the lining of industrial furnace. In order to improve the physical and chemical properties and construction properties of refractory castables, a proper amount of admixtures, such as plasticizer, dispersant, coagulant, retarder, expander, gel - gel and so on, are often added. In addition, the toughness of the refractory castable is greatly increased if a proper amount of stainless steel fiber is added to the refractory castable with strong mechanical force or hot impact. In insulating refractory castables, adding inorganic fibers can enhance toughness and improve insulation performance. Because of the basic material composition of refractory castable (such as aggregate and powder, admixture, binder and admixture), setting hardening process and construction method, it is similar to concrete in civil engineering, so it was once called fire-resistant concrete.

Refractory castable is simple in production process, low in labor and energy saving, high in construction efficiency and good in quality, and can be used to prepare or select materials with excellent performance as required. Therefore, refractory castable is a kind of unshaped refractory material with large dosage and wide application scope.

  


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