What is the use of kaolin?
Kaolin is a kind of fine grained clay with kaolinite or multi water kaolinite as its main component. It was first discovered in kaolin village near Jingdezhen, china. According to historical records, the village area of the Jingdezhen kaolin clay mining heyday in the early Qing Dynasty, to Guangxu was gradually fading to white and delicate famous open world, as an indispensable raw material for billet. So when the town was used in the name of the village "porcelain industry Gaoling" named for him, producing clay from premises. After the extension of the same, and kaolin kaolin produced by the same place and the purpose of use, are called kaolin, such as stars, kaolin, Fuzhou kaolin, etc..
Containing impurities, yellow, gray, green, rose and other colors. The ore was dense block or loose soil, soft, soapy, hardness less than nails. Specific gravity 2. 4~2. 6. The tongue is moist after drying. High refractoriness, up to 1770~1790 degrees centigrade. Medium and low plasticity, with good insulation and chemical stability. High degree of calcination, ranging from 60~90%. Mainly used for making daily ceramics, industrial ceramics, building sanitary ceramics and refractory materials. It is also used as filling or white pigment for paper, rubber and plastic, paint, textile, etc..
Kaolin English read as "Kaoling", after the German scholar Richthofen (Richthofen) by transliteration into "Kao-lin", introduced in Europe and America mineralogy circles, after more than one hundred years of widely adopted, and then became the world's generic name. In general the impurity kaolin ore containing a small amount of montmorillonite, illite, allophane, quartz, mica, calcite, pyrite and organic matter etc.. After manual or refined processing, kaolin can reach the theoretical composition of kaolinite. Its theoretical composition is: SiO246.54%, Al2O339.5%, H2O13.96%. The appearance of pure kaolin is white or light grey.
