... and so on. Calcined flint clay is mainly used for manufacturing high-quality refractory products, refractory castable, sagger, kiln furniture ... , crucibles, ceramic fiber, precision casting sand, ceramics products, etc.Size:Size of calcined flint ... 18-30mesh,30-60mesh,60-80mesh.Size of calcined flint clay flour: 200mesh,270mesh,325meshTechnical Specification Item ...