What is High Alumina Castable Refractory - Refractory ...
2020-9-17 · Silica powder is added to the refractory castable to supplement the tiny pores. Through the precise particle gradation of ultra-fine powder, the strong performance of the castable is improved. The strength of refractory castable comes from high alumina cement, and the CaO in high alumina cement reaches 5% to 8%. It will reduce the medium temperature strength of refractory castables.
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