GuangYi-Mill is a new hi-tech patent production of Hunan GuangYi-Mill Science and Technology limited Company. It adopts unique principle and structure and absorbs many merits of new grinding equipment made in home and abroad. After many years of long-term experiments, it was manufactured successfully. It is a new kind of patent production with high efficiency, power saving, no dust and free from pollution. There are Mill, flour mill, coal mill, vertical mill, high pressure roller mill, classification machine, bucher hoister, auxiliary power plant equipment( grinding coal, desulfuration, limestone preparetion system) in our company. It can be widely applied to chemical engineering, manufacture of building material, metallurgy, mine, source of energy, fire resisting material and it can be used in all kinds of materials'grinding that the mohs hardness is under 8 and the require of finish fineness is not higher than 400 mesh. Such as cement (unripe clinker), limestone, lime, calcium magnesium powder, gypsum, glass, sandstone, coal, coke, shale, gangue, serpentine, slag, blast furnace slag, talc, calcite, dolomite, marble, fluorite, granite, wollastonite, celestite, pyrophyllite, mullite, medical stone, the ferroalloy (electric, ferromanganese, ferrochrome), kaolin, attapulgite, batium, ferric oxide red, alum, potassium, iron oxide red barite, iron ore, copper, manganese mine, manganese metal, sulphur, feldspar, quartz, calcium carbide, the sinter, bauxite, phosphate rock, calcium magnesium phosphate, ammonium phosphate, urea, sodium metasilicate, phosphorous gesso, desulfurization gypsum and all kinds of materials.