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Coal gangue resource utilization treatment method

A treatment method and resource utilization technology, applied in the field of high-sulfur coal gangue utilization, can solve the problems of low utilization rate of high-sulfur coal gangue and small value-added space, and achieve the effect of realizing resource utilization, increasing value-added space, and strong practicability

Active Publication Date: 2019-03-26
绵阳耀邦环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the utilization rate of existing high-sulfur coal gangue is low, and the value-added space is small. Coal powder and coal slime, coal slime can be used to make bricks or pottery, and the processing technology is simple, which reduces the cost of product sorting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention provides a coal gangue resource utilization treatment method, and the treatment steps are as follows:

[0025] Step 1, ore grinding: first crush and grind high-sulfur coal gangue to obtain coal gangue particles, and the particle size of the coal gangue particles is 170 mesh;

[0026] Step 2, mixing slurry: adding water to the gangue particles to prepare a primary slurry, the mass concentration of the primary slurry is 25%, and adding water to the gangue particles and stirring for 10 to 15 minutes;

[0027] Step 3, cyclone separation: the ore slurry is separated through a cyclone separator. Specifically, a hydrocyclone is used, the cone angle of the hydrocyclone is 18°, the cone ratio is 0.50, the cyclone separation pressure is 0.16 MPa, and the cyclone separation time is 3 to 5 minutes;

[0028] Step 4, primary concentration treatment: the upper light material obtained by the cyclone separation is placed in the first stirring tank, and water is added to p...

Embodiment 2

[0034] Step 1, ore grinding: first crush and grind high-sulfur coal gangue to obtain coal gangue particles, and the particle size of the coal gangue particles is 200 mesh;

[0035] Step 2, mixing slurry: adding water to the gangue particles to prepare a primary slurry, the mass concentration of the primary slurry is 20%, and adding water to the gangue particles and stirring for 10 to 15 minutes;

[0036] Step 3, cyclone separation: the ore slurry is separated through a cyclone separator. Specifically, a hydrocyclone is used, the cone angle of the hydrocyclone is 18°, the cone ratio is 0.50, the cyclone separation pressure is 0.16 MPa, and the cyclone separation time is 3 to 5 minutes;

[0037] Step 4, primary concentration treatment: the upper light material obtained by the cyclone separation is placed in the first stirring tank, and water is added to prepare a secondary pulp, the mass concentration of the secondary pulp is 50%; then, it is treated by stirring and centrifugal ...

Embodiment 3

[0043] Step 1, ore grinding: first crush and grind high-sulfur coal gangue to obtain coal gangue particles, and the particle size of the coal gangue particles is 230 mesh;

[0044] Step 2, mixing slurry: adding water to the gangue particles to prepare a primary slurry, the mass concentration of the primary slurry is 15%, and adding water to the coal gangue particles and stirring for 10-15 minutes;

[0045] Step 3, cyclone separation: the ore slurry is separated through a cyclone separator. Specifically, a hydrocyclone is used, the cone angle of the hydrocyclone is 16°, the cone ratio is 0.50, the cyclone separation pressure is 0.16 MPa, and the cyclone separation time is 3 to 5 minutes;

[0046] Step 4, primary concentration treatment: the upper light material obtained by the cyclone separation is placed in the first stirring tank, and water is added to prepare a secondary pulp, the mass concentration of the secondary pulp is 40%; then, it is treated by stirring and centrifugi...

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Abstract

The invention discloses a resource utilization treatment method for coal gangue. The resource utilization treatment method includes the steps that high-sulfur coal gangue is smashed and ground to obtain coal gangue particles, and water is added to the coal gangue particles to prepare primary pulp; the obtained pulp is separated through a cyclone separator; upper-layer light materials obtained through cyclone separation are put into a first stirring tank, and water is added to prepare secondary pulp; then stirring centrifugal separation treatment is conducted, and then upper-layer supernatant liquid and lower-layer concentration materials are obtained; a beneficiation shaking table is used for conducting screening treatment on the lower-layer concentration materials; sewage generated in the fifth step is put into a second stirring tank, and water is added to prepare third-time pulp; then stirring centrifugation separation treatment is conducted, and upper-layer supernatant liquid and lower-layer concentration materials are obtained; and the lower-layer concentration materials are filtered through a belt filter press to prepare coal slime. Pyrite concentrates, pulverized coal and coal slime with high utilization value are separated out from the high-sulfur coal gangue, and the coal slime can be used for preparing bricks or ceramics.

Description

technical field [0001] The invention relates to a method for utilizing high-sulfur coal gangue, in particular to a resource utilization treatment method for coal gangue. Background technique [0002] With the rapid development of the national economy, my country's coal production is also increasing year by year. It is estimated that the amount of coal in 2011 will exceed 3.2 billion tons, of which coal gangue accounts for about 15% of the output, which is accompanied by the problem of gangue accumulation and its associated environmental pollution. Such as: occupation of cultivated land, air pollution by toxic and harmful gases produced by spontaneous combustion, wind erosion dust and leaching water pollution, etc. Therefore, rational utilization of coal gangue can not only protect the environment but also utilize its rich valuable energy and resources. Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/00
CPCB03B9/005
Inventor 谢秩勇
Owner 绵阳耀邦环保科技有限公司
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