Kyanite is a refractory material, belongs to high alumina minerals, strong chemical corrosion resistance, thermal shock mechanical strength, heat expansion irreversible, etc., is the production of amorphous materials and electric furnace top bricks, phosphate non-burning bricks, mullite bricks, low creep bricks the main raw materials, is also a metamorphic mineral, mainly produced in regional metamorphic crystalline schist, its metamorphic phase from the green schist to the horned amphibolite phase. It is also commonly used as a gemstone ring, bracelet, necklace.
Due to the characteristics of kyanite minerals, it is used to manufacture refractory materials, refractory mortar, cement and casting refractory products, as well as plastic pounding mixtures, technical ceramics, spark plugs for automobile engines, insulators, ball mill spheres, test vessels, shock-resistant articles, etc., and can be used to make silicon aluminum alloys by electrothermal method, which are applied to aircraft, automobiles, trains, and ships. With the development of the steel industry, such mines manufacture hot blast furnaces, hot air towers, reheat furnaces, homogenizer furnaces, etc. in the form of refractory bricks, profiles, etc., manufacture kiln facilities, and can also be used for various auxiliary pouring and operating equipment. They can be used to produce spray films, to make crystalline fluite and supersonic aircraft leading edges, metal attachments for spacecraft, and some as gemstones. In addition, it can be used as an abrasive, as a glaze component and as a non-slip flooring material.
Since China began to survey the kyanite minerals in the 1940s, especially in the late 1970s and early 1980s, it has done census and exploration work and found more than 20 kyanite mines, distributed in more than a dozen provinces and regions. The main deposits are: Hanshan, Shuyang County, Jiangsu Province; Yinshan, Henan; Xingtai, Hebei; Inner Mongolia Dianbusi Temple; Buragai, Xinjiang; Fanzhi, Shanxi; Yuexi, Huoshan, Anhui; Liaoning Dahuanggou; Wenchuan, Sichuan; Yunnan Hot Water Pond; Jilin Rock; Shaanxi Yang County Danghekou and so on.
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