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A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting . In materials processing a grinder is a machine for producing fine particle size reduction through attrition and compressive forces at the grain size level.SAG mills are autogenous mills but use grinding balls like a ball mill.
A ball mill is a type of grinder used to grind and blend materials for use in mineral dressingThe ball mill is a key piece of equipment for grinding crushed materials, and it is widely used in production lines for powders such as cement, silicates