A mill is a device that breaks solid materials into smaller pieces by grinding crushing or cutting. Such comminution is an important unit operation in many are many different types of mills and many types of materials processed in them.
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A pulverizer or grinder is a mechanical device for the grinding of many different types of materials. For example a pulverizer mill is used to pulverize coal for combustion in the steamgenerating furnaces of fossil fuel power plants
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