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Method for recycling clean coal from high-ash coal slurry tailings

A high-ash coal recycling technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of high-ash coal slime separation and unusability

Inactive Publication Date: 2011-09-14
杨灵奎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that existing coal washing methods cannot use the difference in density and particle size to sort high-ash coal slime; to provide a method for sorting high-ash coal slime using density and particle size differences Method for recovering clean coal from high ash coal slime tailings

Method used

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  • Method for recycling clean coal from high-ash coal slurry tailings
  • Method for recycling clean coal from high-ash coal slurry tailings
  • Method for recycling clean coal from high-ash coal slurry tailings

Examples

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Embodiment 1

[0023] As shown in the accompanying drawings, a method for reclaiming clean coal from high-ash slime tailings in this embodiment includes the following steps: firstly adjust the slime water to a concentration below 30%, and drive it into the mixed coal with a pump. The material barrel flows into the high-frequency linear vibrating screen for screening to realize desliming and coal slime coarse separation. The mesh number of the high-frequency linear vibrating screen is 200 mesh;

[0024] The under-screen material screened and separated by the high-frequency linear vibrating sieve passes through the multi-stage flotation machine in series to recover clean coal. The steps are: the under-screen material under the high-frequency linear vibrating screen is sent to the preprocessor by water pump for drug mixing: drug foaming Collecting agent and collector are added according to the weight ratio of 1:2, and then flow into 2# flotation machine for rough selection, the scraped material ...

Embodiment 2

[0037] The mesh number of the high-frequency linear vibrating screen in this embodiment is 260 mesh, and the drug foaming agent and collector are added in a ratio of 1:8 by weight, and the rest are the same as those in Embodiment 1.

Embodiment 3

[0039] The mesh number of the high-frequency linear vibrating screen in this embodiment is 240 mesh, and the drug foaming agent and collector are added in a ratio of 1:6 by weight, and the rest are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for recycling clean coal from high-ash coal slurry tailings, which belongs to the method for recycling the clean coal from the coal slurry tailings. The method is mainly used for solving the technical problem that the existing coal cleaning method can not perform separation on high-ash coal slurry by utilizing the differences in density and particle size. The technical scheme of the invention is as follows: the method for recycling the clean coal from the high-ash coal slurry tailings comprises the following steps: firstly regulating water in the coal slurry to the concentration which is below 30%, using a pump to pump the coal slurry into a material mixing barrel, and enabling the coal slurry to automatically flow into a high-frequency linear vibrating screen for screening so as to realize desliming and coarse cutting-off and separation of the coal slurry, wherein the mesh size of the high-frequency linear vibrating screen is 200-260 meshes; enabling material below the screen after screening and separation by the high-frequency linear vibrating screen to pass through multiple stages of flotation machines connected in series for recycling the clean coal; and adopting nine stages of cyclones connected in series to recycle the clean coal from the material above the screen after screening and separation by the high-frequency linear vibrating screen.

Description

technical field [0001] The invention relates to a method for recovering clean coal from high-ash coal slime tailings, which belongs to a method for recovering clean coal from coal slime tailings. Background technique [0002] At present, my country's coal washing industry generally uses jigging units or dense medium units for coal preparation, and its tailings (coal slime) generally use flotation machines or flotation columns to recover tailings clean coal. Due to the incomplete technical process and equipment configuration for recovering tailings, for the finer particle size of the material contained in the coal slime, the separation process based on the difference in the physical and chemical properties of the mineral surface has little effect, resulting in a negative impact on the coal. The waste of resources has also brought relatively large economic losses to the coal washing industry. Contents of the invention [0003] The purpose of the present invention is to solv...

Claims

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Application Information

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IPC IPC(8): B03B7/00
Inventor 杨灵奎杨林
Owner 杨灵奎
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