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  2. Crusher - Wikipedia

    en.wikipedia.org/wiki/Crusher

    A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, sand or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.

  3. Grinding machine - Wikipedia

    en.wikipedia.org/wiki/Grinding_machine

    Pedal-powered grinding machine, Russia, 1902. A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding. It is a type of material removal using an abrasive wheel as the cutting tool. [1] Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.

  4. Mano (stone) - Wikipedia

    en.wikipedia.org/wiki/Mano_(stone)

    Metate, and mano. A Mano, a smooth hand-held stone, is used against a metate, typically a large stone with a depression or bowl.The movement of the Mano against the metate consists of a circular, rocking or chopping grinding motion using one or both hands.

  5. Mill (grinding) - Wikipedia

    en.wikipedia.org/wiki/Mill_(grinding)

    A mill is a device, often a structure, machine or kitchen appliance, that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes.

  6. Mineral processing - Wikipedia

    en.wikipedia.org/wiki/Mineral_processing

    The primarily used equipment in crushing are jaw crushers, gyratory crushers and cone crushers whereas rod mills and ball mills, usually closed circuited with a classifier unit, are generally employed for grinding purposes in a mineral processing plant. Crushing is a dry process whereas grinding is generally performed wet and hence is more ...

  7. Arrastra - Wikipedia

    en.wikipedia.org/wiki/Arrastra

    An arrastra (or arastra) is a primitive mill for grinding and pulverizing (typically) gold or silver ore. Its simplest form is two or more flat-bottomed drag stones placed in a circular pit paved with flat stones, and connected to a center post by a long arm.

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