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A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, sand or rock dust. Crushers are designed to apply high forces to large particles, usually by means of a relatively slow compressive force that produces predominantly cleavage fracture.
Background history of crushers
In industry, crushers are machines which use a metal surface to break or compress materials into small fractional chunks or denser masses. Throughout most of industrial history, the greater part of crushing and mining part of the process occurred under muscle power as the application of force concentrated in the tip of the miners pick or sledge hammer driven drill bit. Before explosives came into widespread use in bulk mining in the mid-nineteenth century, most initial ore crushing and sizing was by hand and hammers at the mine or by water powered trip hammers in the small charcoal fired smithies and iron works typical of the Renaissance through the early-to-middle industrial revolution.
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.
Industrial use of crushers
Mining operations use crushers, commonly classified by the degree to which they fragment the starting material, with primary and secondary crushers handling coarse materials, and tertiary and Quaternary crushers reducing ore particles to finer gradations. Each crusher is designed to work with a certain maximum size of raw material, and often delivers its output to a screening machine which sorts and directs the product for further processing. Typically, crushing stages are followed by milling stages if the materials need to be further reduced. Additionally rock breakers are typically located next to a crusher to reduce oversize material too large for a crusher. Crushers are used to reduce particle size enough so that the material can be processed into finer particles in a grinder. A typical processing line at a mine might consist of a crusher followed by a SAG mill followed by a ball mill. In this context, the SAG mill and ball mill are considered grinders rather than crushers.
In operation, the raw material (of various sizes) is usually delivered to the primary crusher's hopper by dump trucks, excavators or wheeled front-end loaders. A feeder device such as an apron feeder, conveyor or vibrating grid controls the rate at which this material enters the crusher, and often contains a preliminary screening device which allows smaller material to bypass the crusher itself, thus improving efficiency. Primary crushing reduces the large pieces to a size which can be handled by the downstream machinery.
Types of crushers we provide
GE series economical crusher is suitable for on-line recycling of plastic production lines. It has special cutting technology to recover various small hollow materials, including injection mold parts, blow mold parts, profiles, sheets, films and other materials. The recycled flakes are uniform.
GF series crusher is a high output and low energy consumption crusher.
GH heavy-duty crushers are widely used in size reduction of profiles, pipes, film, sheets, large rigid lumps.,etc.
GP crusher is especially designed for small-dia pipes and profiles, suitable for 16-450mm PE, PP, PVC pipes, wide door panels and sheets. For big crushing capacity, can be equipped with feeding conveyor, suction fan, storage bin and dust removal system.
ACERETECH is a creative company, focusing on the technology R&D of Plastics recycling and providing the equipments and solutions for plastics recycling, washing and re-granulation. Thanks to the R&D ability and well-understanding industries′s experience, ACERETECH can provide the customized Plastics recycling solutions to customers. Contact us now!