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China 3.2X4.5m Wet Grinding Ball Mill for Copper Ore - China , Characteristics of Ball mill: It is an efficient tool for grinding many materials into the power. 2 The ball mill is used to grind many kinds of mine and other materials, or to select the mine 3 Ball mill is widely used in building material, and chemical indurstry. 4 There are two ways to grind: The dry way and the wet way