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

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 and large waste of water resources, and achieve the effects of favorable screening, sufficient recycling, and uniform media

Inactive Publication Date: 2020-12-01
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, which is not sufficient for the separation of clean coal, and the original Washing with water, resulting in a large waste of water resources

Method used

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

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Effect test

Embodiment 1

[0042] 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.

[0043] 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] Such as figure 2 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 .

Embodiment 3

[0054] Such as image 3 As shown, the flotation device 14 includes a flotation feeding bucket 141 and a flotation machine 142. The underscreen water of the curved screen 13 first enters the flotation feeding bucket 141, and the overflow of the first hydrocyclone 9 can also enter Flotation into the material barrel 141, add foaming agent and collector to the flotation into the material barrel 141 and stir evenly, then the liquid in the flotation into the material barrel enters the flotation machine 142 for flotation, and the flotation machine can be connected with Multiple, enhance the flotation effect. The collector acts on the hydrophobic surface of the coal to increase the hydrophobicity of the coal, and it is easy to contact with the air bubbles, and then the air bubbles can easily drive the coal to suspend on the surface; adding a foaming agent will break up the large air bubbles into small air bubbles during flotation on the one hand, On the other hand, these bubbles have...

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Abstract

The invention relates to a cleaning utilization process for middling coal and gangue in a coal washing process. The process comprises the following steps that products which are mixed with coal washing medium are selected through a three-product dense medium hydrocyclones; middling coal mixed with the coal washing medium and gangue mixed with the coal washing medium enter a sculping screen for removing the medium respectively; and then the diluted medium liquid obtained after washing at the tail part of the sculping screen enters the magnetic separator; a nonmagnetic material liquid enters themiddle gangue magnetic tail cylinder; the liquid in the middle gangue magnetic tail cylinder is introduced into a first hydrocyclone, and the overflow of the first hydrocyclone enters flotation equipment to separate the flotation concentrate, the flotation concentrate enters a third dewatering device, the bottom flow of the first hydrocyclone enters a second screening device to be screened out ofwater containing middling coal, the screening water of the second screening device returns to the middle gangue magnetic tail cylinder; and the clean coal is obtained through the third dewatering device of the flotation concentrate. According to the process, the effect that water resources can be well utilized in the washing process of the coal washing medium is achieved.

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): B03B7/00B03C1/30B08B3/02C02F9/02B03D1/02B03C1/10B03D103/08
Inventor 王威任福仪
Owner 乌拉特中旗毅腾矿业有限责任公司
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