ball mill 3D model

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A Ball Mill is a grinding equipment that utilizes a rotating cylinder containing steel balls to pulverize material. The rotation speed ranges from 4-20 RPM based on the mill's diameter; larger diameters require slower speeds to prevent centrifugal force from pushing balls to the mill's edge. Operating at 65%-75% of critical speed is ideal. Ball Mills grind materials as fine as 1/4 inch down to 20-75 microns, but need a closed system with recirculation to optimize efficiency. Various classifiers like screens, spiral classifiers, cyclones, and air classifiers aid in discharge classification.