Castables are the main type of monolithic refractories. Depending on the adhesive used, the cure formation mechanism can be divided into three types: hydraulic, air-hard, and hard. It is also the most widely used refractory material at present. Although it is very convenient in construction, it has high requirements for objective factors, not only the proportion of configuration, the amount of water added, but also the storage environment and kiln. There are also special requirements before the furnace is fired. 1. Hydraulic castables: Castables with cement as binder require water to participate in the chemical reaction in the hardening process to form cement hardening strength, all of which are hydraulic refractory castables . Cement is the main factor determining the strength of castables (especially the strength at room temperature), but its refractoriness is relatively low, so after ensuring the necessary strength at room temperature, the amount of cement should be