I believe we are very familiar with the vertical mill, vertical mill's main role is to chunks of coal ore material sufficient milling, the coal mine ground into small particles and then burn them, which helps coal the combustion and exhaust emissions of sulfur removal work. Generally vertical mill in power plants and other large-scale coal enterprises can be widely applied. Because of different kinds of coal and boiler, is somewhat different size requirements for coal, generally 200 mesh or so can be achieved. Usually vertical mill can achieve this fineness. Since long-term storage is easy to damp coal, coal generally contains more than 15% of water, lignite and even as high as 45%, so the grinding equipment must be suitable for high water, and preferably at the same time for drying materials in grinding, vertical absolutely do not need to set up a separate coal mill drying device, you can achieve ultra-fine grinding of the ore. Since coal and other minerals are different, coal itself is flammable, the grinding process can easily cause the grinding compartment fire occurs, it must have a flame-proof measures when grinding.