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Method for improving raw coal sorting effect

A raw coal and sorting technology, applied in the direction of solid separation, can solve the problem that the sorting effect of the washing process cannot meet the production requirements, etc., and achieve the effect of improving the difficulty of coal slurry water treatment, improving the sorting effect, and reducing the jumping teeth.

Inactive Publication Date: 2020-02-18
DATONG COAL MINE GRP
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Problems solved by technology

[0003] In order to solve the technical problem that the sorting effect of the existing washing process cannot meet the production requirements, the present invention provides a method for improving the raw coal sorting effect

Method used

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  • Method for improving raw coal sorting effect
  • Method for improving raw coal sorting effect
  • Method for improving raw coal sorting effect

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Embodiment

[0025] This embodiment takes Dongzhouyao Coal Preparation Plant of Datong Coal Mine Group Co., Ltd. as an example:

[0026] Dongzhouyao Coal Preparation Plant is a mine-type steam coal preparation plant, designed to process 10 million tons of raw coal per year, with an hourly processing capacity of 1,894 tons per hour. The coal preparation process adopts graded full-dense medium separation, 50-200mm lump coal is separated by dense medium shallow tank separator; 50-1.5mm fine coal is separated by dense medium two-product cyclone; 1.5-0.15mm coarse coal Slime is sorted by screw separator; 0.15-0mm fine coal slime is recovered by pressure filter and plate and frame filter press.

[0027] In the actual production process, through the analysis of the coal quality, it is found that it is far from the initial stage of design, as shown in the following table:

[0028] 1. Natural grade sieving test report form

[0029]

[0030] 2. Comprehensive table of +50mm particle size coal fl...

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Abstract

The invention relates to the technical field of beneficiation, in particular to a method for improving a raw coal sorting effect. The method comprises the following steps that a, a large-block ganguescreening grate is additionally arranged at a discharging end of a raw coal grading sieve; b, in a shallow groove workshop, equipment parameters and connection modes of main vulnerable components of heavy-dielectric shallow groove sorter are optimized and improved ; c, a main washing system is paved and inlaid with the wear-resistant material; d, a medium recovery system is modified, so that the effective recovery of the medium is guaranteed; e, a flocculating agent dosing system is upgraded, so that the medicament is fully dissolved; and f, a coal slime system is additionally provided with aplate frame filter press and a coal slime discharging belt according to the production requirements. According to the method, the raw coal sorting effect is greatly improved, the clean coal moisture reaches the requirement, the clean coal yield and the clean coal quality are improved, the dielectric consumption reaches normal requirements, the labor intensity of workers is reduced, the productioncost is relatively reduced, and the economic benefit is improved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for improving the separation effect of raw coal. Background technique [0002] The coal preparation process of the coal preparation plant adopts grading full-dense medium separation, 50-200mm lump coal is separated by dense-medium shallow groove separator; 50-1.5mm fine coal is separated by dense-medium two-product cyclone; 1.5-0.15 Coarse slime of 0.15 mm is separated by a spiral separator; fine slime of 0.15-0 mm is recovered by a pressure filter and a plate and frame filter press. The key equipment of the coal preparation plant is generally imported from abroad and installed in a modular combination to realize automatic control and information management. However, in the actual production process, through the analysis of the coal quality, it is found that the separation effect of the existing washing process cannot meet the production requirements. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00
CPCB03B9/005
Inventor 郝耀伟杨国兴李剑陈占权夏明陈杰
Owner DATONG COAL MINE GRP
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