Multi-stage dissociation-machine and column combined recleaning technology for middling coal intergrowth body of coking fat coal

A technology of conjoined and fat coal, applied in solid separation, flotation, wet separation, etc., can solve the problem that the scarce coking fat coal resources cannot be recycled and reused, and achieve the improvement of equipment sorting efficiency, simple process flow and economical Significant effect

Inactive Publication Date: 2019-05-14
CHINA UNIV OF MINING & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned technologies, it provides a multi-stage solution for medium-coal conjoined body of coke-fat coal with simple steps and high ...

Method used

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  • Multi-stage dissociation-machine and column combined recleaning technology for middling coal intergrowth body of coking fat coal
  • Multi-stage dissociation-machine and column combined recleaning technology for middling coal intergrowth body of coking fat coal

Examples

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Effect test

Embodiment 1

[0031] The coal in the coking fertilizer coal is fed to a fast coarse grinding device; the fast rough grinding device is a self-grinding machine or a rod mill. The product obtained after coarse grinding is fed to the screening equipment for one screening to obtain the product on the sieve and the product under the sieve. The screening equipment is a high-frequency sieve with a sieve aperture of 0.5 mm or a hydraulic sieve with a diameter of 100 mm. The cyclone returns the product on the primary screen to the fast coarse grinding equipment, and feeds the product under the primary screen to the sorting equipment for a sorting. The first sorting equipment is the flotation machine I, and the first sorting tail is obtained. Coal and primary separation clean coal; the primary separation clean coal is fed to the fine grinding equipment, which is a stirring mill or a ball mill; the product obtained after the fine grinding is fed into the screening equipment for secondary screening, so ...

Embodiment 2

[0033] Such as figure 2 As shown, the coal in the coking fertilizer coal is fed into a self-mill or rod mill for coarse grinding, and the product after coarse grinding is fed into a high-frequency sieve with a sieve aperture of 0.5 mm or a hydrocyclone model with a diameter of 100 mm. Once sieved, the sieved product on the sieve is returned to the rapid coarse grinding equipment for re-coarse grinding, and the product under the sieve is sent to the flotation machine Ⅰ as the separation equipment for a separation and flotation. After the flotation, a separation is obtained. Tail coal separation and primary separation clean coal; the primary separation clean coal is fed into a stirring mill or ball mill for fine grinding; the product after fine grinding is fed into a high-frequency sieve with a pore size of 0.25mm or a 75mm diameter The hydrocyclone performs secondary screening. After the secondary screening, the secondary screening product and the secondary screening product ar...

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Abstract

The invention provides a multi-stage dissociation-machine and column combined recleaning technology for a middling coal intergrowth body of coking fat coal, and belongs to a coal separation method. The multi-stage dissociation-machine and column combined recleaning technology comprises the following steps that middling coal of the coking fat coal is fed into quick rough grinding equipment; a product obtained after rough grinding is fed into sieving equipment; a first-time oversize product is returned to be fed into the quick rough grinding equipment, a first-time undersize product is fed intoseparation equipment, and first-time sorted clean coal is fed into fine grinding equipment; a product obtained after fine grinding is fed into the sieving equipment to be subjected to second-time sieving, a second-time oversize product is returned to be fed into the fine grinding equipment, and the second-time oversize product is fed into the sieving equipment to be subjected to third-time sieving; the oversize product is fed into second-time separation equipment to be subjected to separation, and an undersize product is fed into the series separation equipment to be subjected to separation. Dissociation of the middling coal intergrowth body with the fine disseminated grain size is achieved, the recovery rate of coarse particles is effectively increased through stage flotation, the selectivity of fine particles is effectively improved through stage flotation, the recovery rate of the clean coal and the ash content of the clean coal are ensured, the multi-stage dissociation-machine andcolumn combined recleaning technology is simple and reliable in procedure, and the clean coal in the middling coal of the coking fat coal is recovered to the maximum extent.

Description

Technical field [0001] The present invention designs a multi-stage dissociation-mechanical column combined re-selection process of medium-coal conjoined bodies of fat coal, and is especially suitable for a multi-stage dissociation of coking-fat coal contiguous bodies used in the field of coking and fat coal dissociation and reconcentration. Separation-machine column combined reselection process. Background technique [0002] Coking fat coal is a scarce coal in my country and a national strategic material, but its reserves account for less than one-third of the total coal reserves. Due to the common characteristics of poor coal quality and high content of impurities in coking coal, the sorting produces 20%-30% of medium coal. With the deterioration of resource conditions, the sorting of coking coal shows a deteriorating trend. Its outstanding performance is that the coking fat coal has a large contiguous body content, and the inorganic minerals and organic coal rock components ar...

Claims

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Application Information

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IPC IPC(8): B03B7/00B07B1/28B03D1/00B04C9/00
CPCB03B7/00B03D1/00B04C9/00B07B1/28
Inventor 桂夏辉杨自立邢耀文夏阳超徐梦迪曹亦俊刘炯天夏灵勇程宏志魏昌杰
Owner CHINA UNIV OF MINING & TECH
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