Kaolinite refractory materials substituted for silica sand/powder can improve dimensional stability and strength of solica sol sodium solicate compound mold shell.

• 对于硅溶胶水玻璃复合型壳,采用高岭石耐火材料代替石英砂、粉,可以提高型壳尺寸稳定性和型壳强度;