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What are the uses of kaolin?

Pure kaolin is white, fine, and soft, with good physical and chemical properties such as plasticity and fire resistance. Its mineral composition is mainly composed of kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar, and other minerals. Kaolin is widely used, mainly in papermaking, ceramic,s, and refractory materials, followed by coatings, rubber fillers, enamel glaze, es and white cement raw materials, and a small amount in plastics, paints, pigments, grinding wheels, pencils, daily cosmetics, soaps, textiles, petroleum, chemicals, building materials, national defense,e, and other industrial sectors. Kaolin has become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, and national defense. The ceramic industry is an industry that uses a large amount of kaolin. Improving its chemical stability and sintering strength, kaolin decomposes during firing to form the main framework for the strength of the green body, which can prevent the deformation of the product, widen the firing temperature, and also make the green body have a certain degree of whiteness. At the same time, kaolin has certain plasticity, adhesion, suspension, and bonding abilities, which gives porcelain mud and porcelain glaze good formability, making ceramic mud easy to turn and grout, and easy to shape. If used in wires, it can increase insulation and reduce its dielectric loss. Ceramics not only have strict requirements on the plasticity, bonding drying shrinkage, drying strength, sintering shrinkage, sintering properties, refractoriness, and whiteness after firing of kaolin, but also involve chemical properties, especially the presence of coloring elements such as iron, and titanium, copper, chromium, and manganese, which reduce the whiteness after firing and produce spots.

 

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