When the feeding particle size, i.e. the grinding particle size, is small, the grinding fineness is easy to achieve. However, the fineness and productivity are contradictory.
Under the condition of the same feed particle size, the production capacity of the ultrafine vertical mill decreases with the increase of the fineness of grinding products. The finer the grinding product requirements, the more the productivity decreases.
However, for the coarse grinding process, the influence of the fineness change of grinding products on the mill productivity is not as obvious as that of fine grinding.
To sum up, in actual production, each concentrator should find out the suitable feeding particle size of the mill according to the scale of the concentrator and ore properties.