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A clean utilization process of middling coal and gangue in coal washing process

A gangue and coal washing technology, which is applied in the field of medium coal and gangue clean utilization technology, can solve the problems of insufficient separation of clean coal, etc., and achieve the effects of favorable screening, full recovery and uniform medium

Inactive Publication Date: 2021-04-02
乌拉特中旗毅腾矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the medium coal mixed with coal washing medium and the gangue mixed with coal washing medium separated by the dense medium cyclone also contain a certain amount of clean coal, and the separation of clean coal is not sufficient.

Method used

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  • A clean utilization process of middling coal and gangue in coal washing process
  • A clean utilization process of middling coal and gangue in coal washing process
  • A clean utilization process of middling coal and gangue in coal washing process

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Effect test

Embodiment 1

[0043] A clean utilization process of middling coal and gangue in the coal washing process, such as figure 1 As shown, step 1: feed the raw coal into the first screener 1 for screening. The first screener 1 can be a linear vibrating screen. The first screener 1 has a set value for the particle size that can pass through the sieve holes. The set value It can be 50mm, and the raw coal with a particle size greater than 50mm enters the crusher 2 for crushing.

[0044] Step 2: The raw coal crushed by the crusher 2 in step 1 and the raw coal whose particle size is smaller than the set value arrive on a conveyor belt together, and then enter the three-product dense medium cyclone 3 through the transmission belt, and the three-product dense medium cyclone 3 can It is a non-pressurized three-product dense medium cyclone 3. After that, the raw coal is sorted through the three-product dense medium cyclone 3 to separate the clean coal mixed with the coal washing medium, the medium coal m...

Embodiment 2

[0052] In order to improve the clean utilization of the entire coal washing process, the overall coal washing process can refer to figure 2 In step 3, the sieved water of the de-mediation screen 4 is qualified medium, and the qualified medium is recovered to the combined medium cylinder 8, and the medium in the combined medium cylinder 8 is transported to the three-product dense medium cyclone 3 by a delivery pump. As a configuration method of qualified medium, a medium adding device can be added outside the combined medium cylinder 8 to facilitate the replenishment of qualified medium; of course, a sampling valve can be set on the combined medium cylinder 8, and the qualified medium can be taken out from the sampling valve for testing , according to the test results to supplement the qualified medium.

[0053] To screen the raw coal in the three-product dense-medium cyclone 3, it is necessary to input qualified media along the tangential direction. The qualified media can be...

Embodiment 3

[0060] Such as image 3 As shown, in order to remove impurities such as iron in the raw coal, in step 1, the raw coal is magnetically screened using a magnet 20 before entering the first screener 1 . Of course, in order to remove more fully, the raw coal crushed by the crusher 2 in step 2 and the raw coal whose particle size is smaller than the set value can also be magnetically screened by using the magnet 20 before entering the three-product dense medium cyclone 3 .

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Abstract

The invention relates to a clean utilization technology of middling coal and gangue in the coal washing process. The clean utilization technology comprises the following steps that products mixed witha coal washing medium are separated by a three-product heavy medium cyclone; the medium coal mixed with the coal washing medium and the gangue mixed with the coal washing medium respectively enter asculping screen for the medium removing; medium diluting liquid obtained by washing at the tail portion of the sculping screen respectively enters magnetic separators, and nonmagnetic liquid enter a medium gangue magnetic tail cylinder; liquid in the medium gangue magnetic tail cylinder is fed into a first hydrocyclone, the overflow of the liquid enters flotation equipment to separate flotation clean coal; the flotation clean coal enters third dewatering equipment; the bottom flow of the first hydrocyclone enters a second filter to screen out the water-bearing coal; sieve water of the second filter returns to the medium gangue magnetic tail cylinder; and the flotation clean coal is obtained by the third dewatering equipment. The clean utilization technology has the effect of further separating clean coal from the middling coal mixed with the coal washing medium and the gangue mixed with the coal washing medium.

Description

technical field [0001] The invention relates to the technical field of coal washing, in particular to a process for clean utilization of middling coal and gangue in the coal washing process. Background technique [0002] Coal washing is an indispensable process of coal deep processing. The coal directly mined from the mine is called raw coal. Raw coal is mixed with many impurities during the mining process, and the quality of coal is also different. Coal with small internal ash and large internal ash is mixed in Together. Coal washing is an industrial process that removes impurities in raw coal, or classifies high-quality coal and low-quality coal. [0003] The existing coal washing process can refer to the invention patent application number 201310583692.2 or 201310583796.3, which mainly uses a three-product dense medium cyclone to separate clean coal, medium coal and gangue, and then dehydrates and removes medium to form products. The separation of dense medium cyclone i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/005
Inventor 王锴
Owner 乌拉特中旗毅腾矿业有限责任公司
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