Grading production system for open coal breaking and sieving

Abstract

The invention discloses a grading production system for open coal breaking and sieving. The grading production system comprises a mine car, a receiver bin, a heavy plate feeder, a feeder material returning hopper, a feeder head hopper, a tooth roller cracker, a main belt conveying machine, a three-way chute, a transshipment belt machine, a first-time vibrating screen, a hopper under a screen, a turning plate chute, a chute in front of the screen, a belt machine under the screen, a material returning belt machine, a finished product belt machine, a second-time vibrating screen, a winnowing buffer cabin, a winnowing gate, a winnowing feeder, a winnowing belt machine, a winnowing three-way chute, a winnowing coal washer, a clean coal belt machine, a loaded material breaking dust remover, a vibrating screen dust remover, a dust remover scraper, a middling coal belt machine, a gangue belt machine, a coal dust belt machine, a three-time vibrating screen, a middling coal stock bin, a gangue stock bin and a coal dust stock bin, wherein two adjacent devices are communicated through a material conveying pipeline. According to the grading production system disclosed by the invention, the first-time vibrating screen, the second-time vibrating screen, the winnowing coal washer, the three-time vibrating screen and the tooth roller cracker are arranged singly or arranged in parallel accordingto practical requirements.

Description

technical field [0001] The invention relates to a coal crushing, screening and grading production system of an open-pit coal mine, which can produce coal with various particle sizes. Background technique [0002] The existing open-pit coal mine production system generally uses the raw coal to be sent from the feeder to the first-stage toothed roller crusher for primary crushing through the feeder, and the coal after the primary crushing is sent to the secondary toothed roller crusher by the belt conveyor for further processing. Secondary secondary crushing, the coal after secondary secondary crushing is sent to the vibrating screen by the belt conveyor for screening, and several coals of different specifications are screened out, and the finished coal is sent to the finished product stockpile by the finished product belt conveyor. Generally, the particle size of finished coal is 200-300 mm and 160-200 mm for large lump coal, 100-160 mm and 80-100 mm for medium-speed coal, 50...

AI Technical Summary

Problems solved by technology

The production system of the existing technology can only satisfy the production of mixed coal of 0 to 50 mm, small coal of 50 to 80 mm, and medium coal of 80 to 160 mm, and the coal particle size produced by the existing technology is not uniform

When it is necessary to produce large coals of 160-300 mm and coals of other particle sizes, it is often necessary to build an additional production system, resulting in a large footprint, and most of them are produced in the open air, which does not meet environmental protection requirements

At the same time, the equipment is repeatedly invested, the existing equipment cannot be effectively used, and the production capacity of a single production line is generally small

The lump coal produced by the existing technology has a large powder content

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