Charred gemstone is another name for hard clay clinker. It is made of charred gemstone (hereinafter referred to as charred gemstone) sintered at 1250 ℃ ~ 1350 ℃. It is divided into yns45, yns44, yns43, yns42 and other brands according to the different aluminum content and iron content. The main purpose is to produce clay shaped and amorphous refractories, clay crucibles, daily ceramics, casting sand, building ceramics, aluminum silicate fiber and other main raw materials.
The Al2O3 content of standard pyrogem raw ore is 38%, the Al2O3 content after calcination is about 44%, and Fe2O3 < 2%. It has stable composition, uniform texture, dense structure, shell shaped and white section. It is used to produce high-quality clay refractory. The professional term is class I hard clay clinker, and the main chemical composition is alzo; And SiOz, accompanied by a small amount of fez0 and a small amount of Nazo and kzo. The main mineral is kaolin.
It is used in the production of advanced refractory materials, ceramics, aluminum silicate refractory fiber and military industry.
