A jaw 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),Based on principle of crushing without rubbing Minimum dust Oil lubrication, Law wear parts Gap adjustment and overload protection High capacity, High operational eliability Long service and life time Easy replacement of wear and spare part Wide range of application Capacity up to 450 mm Feeding size up to 1260 mm aprox Final grain size <20 mm depending on feed and material size Reduction ratio 1:8
so that pieces of different composition can be differentiated. Crushing is the process of transferring a force amplified by mechanical advantage through a material made of molecules that bond together more strongly, and resist deformation more, than those in the material being crushed do. Crushing devices hold material between two parallel or tangent solid surfaces, and apply sufficient force to bring the surfaces together to generate enough energy within the material being crushed so that its molecules separate from (fracturing), or change alignment in relation to (deformation), each other. The earliest crushers were hand-held stones, where the weight of the stone provided a boost to muscle power, used against a stone anvil. Querns and mortars are types of these crushing devices.Retrieved from "http://starcraft2wiki.net/sc2wiki/index.php?titleView the Original article
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