Feldspar is an aluminosilicate mineral of alkali metals or alkaline earth metals such as potassium, sodium, and calcium, also known as feldspar group minerals. Potassium feldspar (K2O · Al2O3 · 6SiO2), also known as orthoclase, belongs to the monoclinic crystal system and is usually flesh red, white, or gray in color. The potassium feldspar series mainly includes orthoclase, plagioclase, plagioclase, etc.

       Potassium feldspar belongs to the monoclinic crystal system and usually appears in flesh red, yellow white and other colors. The density is 2.54-2.57g/cm3, the specific gravity is 2.56-2.59, the hardness is 6, and its theoretical composition is SiO2 64.7%, Al2O3 18.4%, K2O 16.9%. It has the characteristics of low melting point (1150 ± 20 ℃), long melting interval time, and high melting viscosity, and is widely used in industrial sectors such as ceramic blanks, ceramic glazes, glass, electric ceramics, grinding materials, and potassium fertilizer production.