A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, 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.
Dowd Supply - Specializing in concrete construction products and supplies, light construction equipment and compaction equipment. Dowd Supply Company has been serving the concrete construction industry since 1981, and we continue to provide our customers with quality
Abutment — In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.
Superior Industries' patent-pending Liberty® Jaw Crusher processes aggregates in stone, concrete, asphalt, and ore applications. Functioning as a primary crusher in mining and aggregate applications, the unit compresses material as it travels down the increasingly narrow angle between the crusher jaws.
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