Lingshou the Yijia minerals processing plant type of mica muscovite, phlogopite, biotite, sericite, dehydrated mica, mica. Processing methods are divided into the dry mica and wet mica. 
 The main specifications are: 20 mesh, 40 mesh, 60 mesh, 80 mesh, 100 mesh, 200 mesh, 325 mesh, 400 mesh, 500 mesh, 600 mesh, 800 mesh, 1000 mesh, 1250 mesh, 2500 mesh. 

 Mica main crystallization monoclinic system, the crystal was a thin sheet of fake six-party Flake, tabular, and sometimes showed a false hexagonal columnar. Hardness of 2 to 3, the proportion of .70 to 3.20. The refractive index of the mica with increased iron content increased accordingly by the protrusions are to Chiang Kai-shek protrusions. Iron-free variant of sheet colorless, iron the higher the deeper the color, pleochroism and absorption enhancement. 
 Lingshou territory, the rocks contain abundant mineral of the mica, according to the geological department exploration, crushed mica reserves of 1.7 million tons, ore grade, good quality, is only broken mica origin. 
 Physical characteristics: Mica is a layered silicate minerals containing water, many different types of mica with acid, alkali, chemical stability, but also has good insulation and heat resistance, incombustible, and corrosion resistance. 

 Mica purposes: the most used in industry muscovite, followed by phlogopite. Widely used building materials industry, the fire industry, fire extinguishing agent, welding, plastic, electrical insulation, paper, asphalt paper, rubber, pearlescent pigments and other chemical industries. 

 Chemical composition: 
 Composition of SiO2 MgO Al2O3 Cao, of Fe2O3 of K2O of Na2O Loss on ignition 
 Content of 44.3% 0.62 31.21 0.75 5.74 10.58 1.17 4.97