Long powder main ingredients for SiO 2, Al 2 O 3, K 2 O, Na 2 O, CaO, mainly used in the manufacture of ceramics and ceramic and glass materials, such as abrasive Abrasives. Feldspar hardness fluctuations in 6-6.5, the proportion of fluctuations in the 2-2.5, of the crisp, high compressive strength, the stronger the acid chemical stability. K-feldspar color mostly red meat, also gray and white brown. Albite as white, gray and pale yellow, anorthite is white or light gray. K-feldspar is a rich potassium silicate minerals. It has a low melting point, melting interval length, high melt viscosity of the mobility of the small advantages. Blank widely used in ceramics, pottery glaze, Abrasives abrasive, electrical porcelain, welding electrodes, and other