Kaolin is a kind of non-metallic mineral, which is clay and clay rock dominated by kaolinite clay minerals.The pure kaolin is white, fine and soft, with good plasticity, fire resistance and other physical and chemical properties.Its mineral composition is mainly composed of kaolinite, eloise, hydromica, illite, montmorillonite, quartz, feldspar and other minerals.Kaolin is widely used in papermaking, ceramics and refractory materials, followed by coating, rubber filler, enamel glaze and white cement raw materials, a small amount of plastic, paint, pigment, grinding wheel, pencil, daily cosmetics, soap, textile, petroleum, chemical industry, building materials, national defense and other industrial departments.Mineral raw materials necessary for papermaking, ceramics, rubber, chemicals, coatings and national defense industries.Calcined kaolin for paper making is made from high-quality coal-series kaolin through ore dressing, ultra-fine grinding and calcining.It has complete hexagonal structure, good porosity, reasonable particle size distribution and excellent light scattering.At the same time.Due to its high whiteness, low wear value and good oil absorption, it is a kind of excellent paint pigment, which is mainly used in the surface coating of paper making industry.It has the characteristics of reducing production cost, improving paper properties, increasing humor absorption, good compatibility with other components and high viscosity.Physical and chemical properties: more lackluster, pure when yan bai is exquisite, such as when containing impurities can be with gray, yellow, brown and other colors.The appearance may be loose soil and compact rock according to different genesis.Density of 2.54 2.60 g/cm3.Melting point of about 1785 ℃.Plastic, wet soil can be molded into a variety of shapes without breaking, and can remain unchanged for a long time.