Being as two layer refractory lining on valve plate and valve body,light mullite and phosphate corundum refractory castables are taken as heat isolation and heat resisting layers respectively.

• 阀板、阀体的耐火衬里隔热层采用莫来石轻质耐火浇注料、耐热层采用磷酸刚玉质耐火浇注料,进行两层浇注。