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<p>In ball mill grinding process, ore particle size effects on ball mill productivity exists, the operator must pay attention to in the actual production, when the requirements of grinding minerals is coarse, primary jaw creusher, ceramic ball millproductivity is more obvious with the changes of the ore particle size, and the requirements of grinding minerals is fine, ball mill productivity with changes in feed size is less prominent. At high temperature, oil viscosity is easy to become very low, and cannot form the lubrication film; when temperature is low, viscosity is easy to become high, vsi sand maker, and it is difficult to start and operate. In this case, china dryer, we’ll examine the temperature of the working conditions first, and according to the different rational temperature t