What is the 3-4 t/h gypsum roller mill?

Ball mill , Raymond roller mill and vertical roller mill are three kinds of classic grinding mills for sale in modern construction and mining industry. Comparing with Raymond mill and vertical mill , ball mill is much larger grinding capacity per hour. However Raymond mill and vertical mill can produce fine powder from 80 meshes to 400 meshes, vertical mill can reach fineness of 1250 meshes, which is equal to 10 μm .