The grinding equipment commonly used on the domestic market: Raymond mill, ball mill, vibration mill, impact mill, ring roller mill. The principle of Raymond mill is grinding rollers under the effect of centrifugal force pressed grinding ring leaving out material crushing, grinding out powder fineness not, generally less than 400 mesh grind out the powder iron content high. Mill Working principle: the driven cylinder body of the cylinder circumferential movement of the steel balls (medium) and the material together with a circular motion along the cylinder wall, under the action of gravity when the medium to a certain height and material running parabolic movement, the medium hit on the material leaving the material crushed. Ball mill ultrafine powder Disadvantages: energy consumption, grinding out the powder off the whiteness, high iron content. Vibration mill works: material and grinding media into the spring-loaded barrel by the eccentric block vibration absorption device driver mill shell in a circular motion, through the medium of high frequency vibration on the role of material impact, friction, shear and crushed. Energy consumption vibrating mill, grinding out the powder off the whiteness, high iron content. Impact mill works: fierce impact around the hammer on the horizontal or vertical axis high-speed rotation of the rotor of the materials, and produce the strong impact of the high-frequency it between the liner and the materials and materials, shear The role of the material crushed. The device drawback is not suitable for the material of the high hardness of the abrasive, easy to heat. With this equipment is not suitable for heat-sensitive substances smash. Due to a gap between the roller and the grinding ring (3-5mm), iron and iron is not in direct contact, but indirectly through the layer of material grinding, so grinding out the powder quality good: a low iron content, can not afford white degrees, the first advantage of the powder crystal structure does not occur a large change. The device less wearing parts, low maintenance costs, the ring spin ultrafine mill is the best energy-saving ideal equipment in many ultra-fine powder equipment. For more information: company website http://www.yhzg.org http://www.mfsbw.net