The main component of mullite is kaolinite, which is light gray, gray or gray in appearance, with conch section and a slightly smooth surface. The clinker after calcination is white, nearly white or mixed with light yellow. Chemical composition :Al2O330% ~ 50%, SiO240% ~ 60%. Al2o338% before calcination and Al2O344% after calcination are typical coking gems with stable chemical properties. Due to the sedimentary deposit of coke gem ore system, the composition is stable, the structure is very dense, without bedding, the particles are very fine, the plasticity index is less than 1.0, and it is easy to be weathered and broken into fragments.

      Coking gems are a mixture of various aluminosilicates. The main chemical composition is Al2O3 and SiO2 oxides, impurities are mainly alkali, alkaline earth and iron, titanium oxides, as well as some organic matter. All kinds of oxides can help melting and reduce the refractoriness of raw materials. Therefore, the lower the impurity content, especially Na2O+K2O content, the higher the refractoriness. The closer the al2o3/3sio2 ratio is to the theoretical value (A/S=0.85), the higher the purity is. The larger the A/S, the higher the refractoriness of the burnt gem, the wider the sintering melting range. High quality coking stone refractoriness can reach more than 1750℃.

      High quality coking stone raw materials full of mullite, mullite powder quality and performance, the factory main 16-30 mesh, 30-60 mesh, 200 mesh, 80-120 mesh, 40-70 mesh quality mullite and mullite powder, and can be produced according to customer requirements of the required specifications mesh, Products are widely used in military, steel mills, boiler plants, precision casting, ceramic fiber and other silicon sol technology of stainless steel precision casting industry. The company has advanced precision casting sand production and processing equipment and technology, perfect management and service system, lean production, quality assurance, welcome new and old customers inquiry.