Flowing current separation process coal mine underground gangue dumping system

Abstract

The invention relates to a flowing current separation process coal mine underground gangue dumping system. The technical scheme includes that a run-of-mine coal conveyor is mounted on one side of a feeding end of a roller screen, two ends of an on-screen selected raw material coal conveyor are connected with a front-screen chute of the roller screen and a feeding port of a flowing current separation machine respectively, a block coal of the flowing current separation machine is connected with a dewatering screen, an oversize material discharging end of the dewatering screen is sequentially connected with a block coal conveyor, a block coal transferring conveyor and a pulverized coal conveyor, a high frequency screen is mounted in the middle of the block coal conveyor, under-screen water of the dewatering screen is connected with a concentration tank through a pipeline, the concentration tank is connected with the high frequency screen, a gangue outlet of the flowing current separation machine is connected with a bucket elevator, a discharging end of the bucket elevator is sequentially connected with a gangue conveyor, a gangue transferring conveyor and a gangue warehousing conveyor, under-screen water of the high frequency screen and overflow of the concentration tank are connected with a circulating water tank through pipelines respectively, and the circulating water tank is connected with a water inlet of the flowing current separation machine through a circulating water pump and a pipeline. The flowing current separation process coal mine underground gangue dumping system is simple in process, good in separation effect, low in power consumption and low in operating cost.

Description

technical field [0001] The invention relates to an underground gangue discharge process system in the coal mining (coal preparation) industry, in particular to a system for sorting raw coal into clean coal and gangue in coal mines. Background technique [0002] There is a large amount of visible gangue in the raw coal (coal that has not undergone any processing) mined in coal mines. Generally, the raw coal is directly transported to the ground by mine skips or belt conveyors without treatment for gangue discharge. First of all, a large amount of waste rock is piled up on the ground to form a "dump of waste rock". According to relevant information: there are currently more than 1,900 large and medium-sized coal mine gangue dumps in the country, and about 10% of the gangue dumps are spontaneously combusting. The spontaneously combusted gangue dumps not only release a large amount of SO 2 ,CO,H 2 S and other toxic and harmful gases will destroy the ecological environment, cau...

AI Technical Summary

Problems solved by technology

Third, the transportation of gangue in the underground coal flow system is an ineffective transportation, and this part of the ineffective transportation will greatly reduce the actual production capacity of the mine

Due to the complex process of the dense-medium shallow groove gangue removal system, the jig machine gangue removal system has many supporting equipment, the size of the sorter is large and the power consumption is large, etc., which are limited in use.

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