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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.
Large road-portable plants can crush concrete and asphalt rubble at 600 tons per hour. These systems normally include a side discharge conveyor, a screening plant, and a return conveyor from the screen back to the crusher for re-crushing large chunks. Compact, self-contained crushers can crush up to 150 tons per hour and fit into tighter areas.
The drive belt: used to transfer power from the engine's flywheel. Here shown driving a threshing machine.. Apart from threshing work, portable engines were used to drive corn-mills, centrifugal pumps, stone-crushers, dynamos, chaff-cutters, hay-balers and saw benches.
The crushed stone materials are conveyed to crushing plant by belt conveyor for secondary crushing before they are sent to vibrating screen to be separated. After separating, qualified materials will be taken away as final products, while unqualified materials will be carried back to the stone crushing equipment for recrushing.
Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from naturally occurring gravel , which is produced by natural processes of weathering and erosion and typically has a more rounded shape.
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These mills use toothed cylinders made of stone or metal to grind the apples into pomace. [9] Such mills are portable, and produce a pomace that is finer than that of the large horse-mills. [8] [9] It was first introduced to England in 1689 by agriculturalist John Worlidge, who adapted it from the sugar-cane crushers used in the West Indies. [12]
The past two decades have witnessed increasing innovation in alternative protein sources in the search for a more sustainable food system to support a rapidly growing global population.
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