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A Flotation Clean Coal Recovery Uniform Mixing Process

A flotation and clean coal technology, applied in the direction of solid separation, etc., can solve the problems of dehydration effect and clean coal filter press, etc., and achieve the effect of reducing ash content, enhancing the degree of dispersion, and enhancing the recovery rate

Inactive Publication Date: 2017-03-22
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All kinds of dehydration equipment can handle flotation foam. Although other dehydration equipment will not cause the problem of clean coal agglomeration compared with clean coal filter presses, they are far inferior to clean coal filter presses in terms of dehydration effect.

Method used

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  • A Flotation Clean Coal Recovery Uniform Mixing Process
  • A Flotation Clean Coal Recovery Uniform Mixing Process
  • A Flotation Clean Coal Recovery Uniform Mixing Process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to figure 1 , a flotation clean coal recovery uniform mixing process, comprising the steps of:

[0037] S1, sending the coal to be processed into the flotation machine for flotation coal preparation to obtain flotation foam;

[0038] S2, sending the obtained flotation foam into the filter equipment for dehydration treatment to obtain flotation clean coal;

[0039] S3, transfer the obtained flotation clean coal to the disc feeder through the conveyor, and then transport it to the first mixer through the chute for preliminary dispersion;

[0040] S4, transporting the material obtained in S3 to the crusher for crushing;

[0041] S5, transporting the material obtained in S4 to the second mixer for re-dispersion;

[0042] S6. Transport the material obtained in S5 and the clean coal of gravity coal separation to the third mixer for dispersion and mixing to obtain clean coal.

Embodiment 2

[0044] A flotation clean coal recovery uniform mixing process, in S2, the flotation foam is sent to a clean coal filter press and / or pressure filter for dehydration treatment, to obtain flotation clean coal.

[0045] Other steps are with embodiment 1.

Embodiment 3

[0047] A flotation clean coal recovery uniform mixing process, in S2, 30wt% flotation foam is sent to the clean coal filter press for dehydration treatment, to obtain the first filter cake and the first filtrate, the water content of the first filter cake is 24.5 %, the solid content of the first filtrate is 0.011g / L, and the 70wt% flotation foam is sent into the pressure filter for dehydration treatment to obtain the second filter cake and the second filtrate, and the water content of the second filter cake is 19.3%. The solid content of the second filtrate is 6.5g / L, and the first filter cake and the second filter cake are combined to obtain flotation clean coal. The first filtrate is sent to the circulating water tank for recycling as circulating water, and the second filtrate is sent to the thickener by the coal slime water system. deal with.

[0048] Other steps are with embodiment 1.

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Abstract

The invention discloses a flotation clean coal efficient recycling even material mixing technology which comprises the following steps that coal to be processed is sent into a flotation machine for coal flotation processing, and flotation froth is obtained; the obtained flotation froth is sent into filtering equipment for dehydration, and flotation clean coal is obtained; the obtained flotation clean coal is transferred to a disk feeder through a conveyor, and then the flotation clean coal is conveyed to a first material mixer through a chute for preliminary dispersing; obtained materials are conveyed to a crusher for crushing; the obtained materials are conveyed to a second material mixer for dispersing again; and the obtained materials and the clean coal obtained by gravity coal dressing are conveyed to a third material mixer for dispersing mixing, and clean coal is obtained. The obtained clean coal is low in moisture content and high in ash content dispersity, and ash content is lower than 10%.

Description

technical field [0001] The invention relates to the technical field of coal flotation, in particular to a flotation clean coal recovery uniform mixing process. Background technique [0002] Energy is an indispensable material basis for the national economy and human existence, and coal is the main energy source in my country, and its production and consumption ranks first in my country's energy list. my country is a big country of coal production and consumption, but a large amount of coal mining and utilization will have a great impact on the environment and climate. Therefore, my country strongly supports clean coal technology. As the basis of clean coal technology, coal preparation is an indispensable part. [0003] According to the analysis of the coal sales market, buyers have high requirements on the ash content of clean coal products. Generally, it is required that the ash content of clean coal products blended with flotation clean coal should be less than 10%. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/00
Inventor 吕凯夏玲燕周伟费之奎吴超白雪杰
Owner ANHUI UNIV OF SCI & TECH
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