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A sorting system and sorting process for coal slime recovery

A coal slime recovery and separation system technology, applied in flotation, solid separation, wet separation, etc., can solve the problem that the continuous separation and recovery of coal slime cannot be satisfied, the separation process is complicated, and the content of product mismatches is high. problems, to achieve the effect of eliminating particle buoyancy limitations, improving clean coal quality, and reducing dilution water

Active Publication Date: 2021-02-19
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a sorting system and a sorting process for coal slime recovery, to solve the problem of complex process flow, small processing capacity and low content of product mismatch in the existing slime sorting process. High and unable to meet the problem of continuous separation and recovery of coal slime

Method used

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  • A sorting system and sorting process for coal slime recovery
  • A sorting system and sorting process for coal slime recovery
  • A sorting system and sorting process for coal slime recovery

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Embodiment 1

[0049] A specific embodiment of the present invention, such as Figure 1 to Figure 2 As shown, a sorting system for coal slime recovery is disclosed, including a coal slime mixing tank 1, a classifying cyclone 3, a first pulp preprocessor 5, a three-product hydraulic flotation machine 6, a second pulp preprocessor Processor 8 and flotation column 9; a first slurry pump 2 is set between the coal slurry mixing tank 1 and the classifying cyclone 3, and a second slurry pump is set between the classifying cyclone 3 and the first pulp preprocessor 5 A slurry pump 4, a third slurry pump 7 is arranged between the classifying cyclone 3 and the second slurry preprocessor 8, the first slurry preprocessor 5 is connected to the three-product hydraulic flotation machine 6, and the second slurry preprocessor Processor 8 is connected with flotation column 9 . Specifically, the discharge port of the coal slime mixing tank 1 is communicated with the feed port of the classifying cyclone 3 throu...

Embodiment 2

[0077] Another specific embodiment of the present invention, such as image 3 As shown, a sorting process for coal slime recovery is disclosed, which is implemented using the sorting system of Implementation 1. The steps include:

[0078] Step 1: Put the selected coal slime A into the coal slime mixing tank 1, add an appropriate amount of water for stirring, to ensure that the coal slime particles are evenly dispersed in the pulp and the concentration of the pulp must meet the minimum feeding requirements of the classifying cyclone 3, and the stirred pulp The first slurry 2 is fed into the bottom feed port of the classifying cyclone 3 along the pipeline at a certain pressure.

[0079] The coal slime particles in the slurry are classified according to the particle size of 0.25mm in the classifying cyclone 3, and the coarse coal slime larger than 0.25mm is discharged from the bottom outlet of the classifying cyclone 3, and sent to the first slurry pretreatment by the second slur...

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Abstract

The invention relates to a sorting system and technology used for coal slime recycling and belongs to the technical field of coal slime sorting and recycling. The problems that an existing coal slimesorting technology is complex in process, low in treating capability and high in product misplaced material content and cannot achieve continuous sorting and recycling of coal slime. The sorting system comprises a coal slime stirring barrel, a classifying cyclone, a first ore pulp preprocessor and a three-product hydraulic flotation machine. The coal slime stirring barrel is connected with the classifying cyclone through a first slurry pump. The classifying cyclone is connected with the first ore pulp processor through a second slurry pump. The first preprocessor is connected with the three-product hydraulic flotation machine. By means of the sorting system and technology used for coal slime recycling, fluidization and sorting are conducted on 2-0.25 mm coarse-particle coal slime in the three-product hydraulic flotation machine, cleaned coal, middling coal and tailings are obtained, reverse flow sorting is conducted on 0.25 mm-0 mm fine-particle coal slime in a flotation column, cleancoal and middling coal are obtained, refining recycling on the coarse and fine coal slime is achieved, gradient utilization on coal resources is also achieved, and economic resource benefits can be maximum.

Description

technical field [0001] The invention relates to the technical field of coal slime separation and recovery, in particular to a sorting system and a sorting process for coal slime recovery. Background technique [0002] As we all know, my country is a country rich in coal, poor in oil, and low in gas. As an important pillar of my country's energy structure, coal will have an unshakable dominant position in the next few decades of development. With the decrease of coal resources and the rapid development of mechanized coal mining and dense medium coal preparation, the problem of difficult separation of coal slime in my country has become more prominent, showing the characteristics of micronization, high ash content, and large content of intergrowth. Traditional coal slime separation has problems such as weak recovery ability, strong scale effect, and non-uniform change of buoyancy, all of which put forward higher requirements for the optimization of coal slime separation proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B5/62B03D1/02B04C9/00
CPCB03B5/623B03B7/00B03D1/025B04C9/00
Inventor 邢耀文丁世豪桂夏辉曹亦俊魏立勇车涛田立新孟凡彩佟顺增
Owner CHINA UNIV OF MINING & TECH
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