Mo to sand in a series of high-temperature roasting, crushing, screening, Raymond, in addition to iron, etc. These processes are made by using such a fabrication of mullite sand with a high aluminum content, low iron content, low hardness, low coefficient of thermal expansion characteristics, but also has a certain fire resistance and thermal and chemical properties, and its nature is more excellent. As unshaped refractories and precision sand casting, using its thermal stability, low coefficient of thermal expansion, high temperature strength of a series of advantages, used in precision casting and refractory industries as well as mechanical, aerospace, weapons manufacturing, metallurgy, chemical industry, oil and other industries. Pouring casting prone shelling, deformation does not occur, is not prone to scale phenomena, with a good finish and so on. Uses the use of unique hard clay mineral resources, high temperature roasting, crushing, screening, Raymond, iron and other machining process and made with high aluminum, iron low, high hardness, low coefficient of thermal expansion, high refractoriness stable chemical properties such as excellent thermal mullite series of sand, powder. Modeling materials are mainly used for investment casting, plaster filler V method modeling and vacuum casting, and large, medium and small steel, bronze pieces, refractory lining, is also used in the manufacture of sodium silicate, refractory products, concrete materials etc., are widely used in machinery, aviation, steel, metallurgy, oil, insulation, sintering, construction and other industries. Product specifications mullite sand specifications (mesh): 8-16 mesh, 16-30 mesh, 30-60 mesh, 60-80 mesh, 80-120 mesh. Mullite powder size (mesh): 150--400 mesh packaging forms: 25kg, 50kg plastic woven bags, tons of bags