Dissociation and recleaning technology for coking fine grain middling coal

A fine-grained and dissociated technology, used in flotation, solid separation, wet separation, etc., can solve the problem that resources cannot be recycled and reused, and achieve the effect of ensuring flotation selectivity, simple process flow, and reducing pollution.

Active Publication Date: 2017-05-17
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a dissociation and reselection process for coking fine-grained medium coal, in order to overcome the deficiencies of the traditional technology of reclaiming low-ash clean coal from medium coal, and fundamentally solve the existing scarcity Coking coal resources cannot be recycled and reused

Method used

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  • Dissociation and recleaning technology for coking fine grain middling coal
  • Dissociation and recleaning technology for coking fine grain middling coal

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Such as figure 2 Shown, the concrete reselection technological process of the present invention is as follows

[0055] S1. Feed the fine-grained medium coal 1 (raw material) with a particle size below 3mm into the mixing tank A through a feed pump (not shown in the figure) for slurry mixing, and produce fine-grained medium coal slurry 2 after slurry adjustment.

[0056] S2. Feed the fine-grained medium coal slurry 2 into the spiral separator B for spiral tailing operation, and produce high-ash gangue particles as the sorted tailing coal 3, and simultaneously produce and retain the sorted coarse and clean coal 4; The ash content of the sorted tailing coal 3 can reach about 70%, which is treated as gangue.

[0057] S3. Put the sorted coarse and clean coal 4 into the vibrating curved screen C for grading operation. The sieve hole size of the vibrating curved screen is 0.5mm, and the grading particle size is about 0.25-1mm. Clean coal 5, and the undersieve is fine-graine...

Embodiment 2

[0064] Such as figure 2 Shown, the concrete reselection technological process of the present invention is as follows

[0065] S1. Feed the fine-grained medium coal 1 (raw material) with a particle size below 3mm into the mixing tank A through a feed pump (not shown in the figure) for slurry mixing, and produce fine-grained medium coal slurry 2 after slurry adjustment.

[0066] S2. Feed the fine-grained medium coal slurry 2 into the spiral separator B for spiral tailing operation, and produce high-ash gangue particles as the sorted tailing coal 3, and simultaneously produce and retain the sorted coarse and clean coal 4; Sorted tailing coal 3 is treated as gangue.

[0067] S3. Put the sorted coarse and clean coal 4 into the vibrating curved screen C for grading operation. The sieve hole size of the vibrating curved screen is 0.7mm, and the grading particle size is about 0.25-1mm. Clean coal 5, and the undersieve is fine-grained coarse clean coal 7.

[0068] S41. Feed the coa...

Embodiment 3

[0074] Such as figure 2 Shown, the concrete reselection technological process of the present invention is as follows

[0075] S1. Feed the fine-grained medium coal 1 (raw material) with a particle size below 3mm into the mixing tank A through a feed pump (not shown in the figure) for slurry mixing, and produce fine-grained medium coal slurry 2 after slurry adjustment.

[0076] S2. Feed the fine-grained medium coal slurry 2 into the spiral separator B for spiral tailing operation, and produce high-ash gangue particles as the sorted tailing coal 3, and simultaneously produce and retain the sorted coarse and clean coal 4; Sorted tailing coal 3 is treated as gangue.

[0077] S3. Put the sorted coarse and clean coal 4 into the vibrating curved screen C for grading operation. The sieve hole size of the vibrating curved screen is 1mm, and the grading particle size is about 0.25-1mm. Coal 5, and the undersieve is fine-grained coarse coal 7.

[0078] S41. Feed the coarse-grained co...

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Abstract

The invention relates to a dissociation and recleaning technology for coking fine grain middling coal. The technology comprises the processes that the size mixing operation is conducted on the fine grain middling coal; the operation of pretreating ore to remove tailings is conducted through coarse slime separation equipment; classification is conducted through classification equipment, and fine grain coarse clean coal and coarse grain coarse clean coal are produced; dissociation is conducted on the coarse grain coarse clean coal through coal grinding equipment; the flotation operation is conducted on fine grain coarse clean coal through size mixing equipment; after size mixing is conducted on the fine grain coarse clean goal through rough separation equipment, rough separation clean coal is produced; and concentrate is conducted on the rough separation clean coal through cleaning equipment, and the clean coal is produced. The dissociation and recleaning technology has the beneficial effects that the process is simple, the technology is mature, the investment is small, the operating cost is low, and the economic benefits are remarkable; the ash content of the tailings is guaranteed, and meanwhile the materials with the medium ash content and the low ash content are fully dissociated; and it is avoided that gangue enters a grinding machine, the load of the grinding machine is reduced greatly, the energy consumption is lowered, and the recovery rate of the tailings and the clean coal is increased.

Description

technical field [0001] The invention relates to the technical field of coal re-selection technology, in particular to a dissociation and re-selection technology of coking fine-grained coal. Background technique [0002] The invention is based on the practical technology of crushing and reselecting coking fine-grained coal, and its main purpose is to recover scarce coking coal resources. [0003] my country is rich in coal resources and has a complete range of coal types, but the reserves of various coal types vary greatly, and the reserves of coking coal resources account for less than one-third of the total reserves. The average yield of coking medium coal produced by coking coal preparation plants in my country is above 30% every year. This part of coking medium coal cannot meet the requirements of coking and is often used as steam coal. The irrational use of resources has led to great waste. Therefore, it is of great significance to study coal dissociation and reselection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03B5/52B03D1/14B07B1/28B02C21/00B02C23/14B03D1/012B03D101/04B03D101/02
CPCB02C21/00B02C23/14B03B5/52B03B9/005B03D1/012B03D1/14B03D2201/02B03D2201/04B07B1/28
Inventor 桂夏辉曹亦俊邢耀文李臣威杨自立王东岳
Owner CHINA UNIV OF MINING & TECH
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