Selective crushing type gangue separator

Abstract

A separating machine for selective crushing and separating of coal and gangue comprises: a spiral screen plate formed by combining a plurality of screw rod assemblies disposed on one end of an underframe; gears in mutual transmission which are arranged between a plurality of screw rod assemblies. A power installation for rotating the plurality of screw rod is connected with the spiral screen plate by a coupler. A plurality of impact impellers fixed on a transmission shaft along the direction of the screw rod is provided above the spiral screen plate. The transmission shaft of each impact impeller is supported in a bearing seat of a housing and connected with an explosion proof motor disposed on the other end of the underframe by the coupler. The separating machine can separate the coal and the gangue underground, make bulk gangue directly fill a gob area without being discharged from mine, which not only save the costs for transport, ground land occupation, preventing surface subsidence, environmental treatment and the like, but also can reduce environmental pollution and save transport capacity of the gangue both in surface and underground. The invention has advantages of simple and compact equipment, convenience for assembling and disassembling, good separation effect, and extensive practicality.

Description

technical field [0001] The invention relates to a selective crushing coal gangue separator, which is especially suitable for the separation of bulk coal and coal gangue in underground mines. Background technique [0002] For the separation of coal and gangue, the common separation methods include artificial hand separation, water separation, winnowing, and gamma ray separation. [0003] 1) Manual hand selection: mainly to use human eyes to pick out large pieces of gangue from the mixed coal on the belt conveyor by hand. Its working conditions are very difficult, the efficiency is low, it is easy to cause wrong selection, missed selection, and great potential safety hazards. [0004] 2) Water separation: use the different proportions of coal and gangue to separate coal and gangue by the buoyancy of water, and the separation effect is better. However, its equipment is expensive, the process is complicated, and the required site is large, and a lar...

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Problems solved by technology

Its system is complex, the sorting capacity is small, and there are hidden dangers of radioactive sources. There is often water or slime in the raw coal on site, so that the surface of coal and gangue is covered by slime, causing difficulties in identification.

[0007] With the increasing degree of mechanization of coal mining, the amount of large pieces of gangue mixed into coal is gradually increasing. The above coal preparation methods are all carried out on the ground. environment, high cost, not suitable for downhole

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