Raw coal initial cleaning treatment process

Abstract

The invention discloses a raw coal initial cleaning treatment process, and relates to the field of raw coal processing. The raw coal initial cleaning treatment process comprises the following steps of1, feeding raw coal; 2, primary screening of raw coal; 3, primary grading of raw coal; 4, primary rough separation of the gangue, uniformly conveying the coarse oversize products of the step 3 on conveying equipment, in the conveying process, and a control pushing device is used for pushing the gangue in the coarse oversize product to a buffer area; 5, primarily crushing; 6, performing magnetic screening and grading again; and 7, crushing again. The raw coal initial cleaning treatment process has the advantages that when raw coal is fed, meanwhile, the uniform feeding is guaranteed, the heating and drying and unfreezing are carried out, the water in the raw coal is removed, the raw coal caking blocks are scattered, and the screening of the subsequent raw coal is facilitated; the process is more labor-saving and convenient during rough separation of the gangue, the labor intensity of workers is reduced, the whole process realizes two-time iron removal for the raw coal, so that the quality of the finally crushed raw coal can be improved.

Description

technical field [0001] The invention relates to the field of raw coal processing, in particular to a raw coal initial cleaning process. Background technique [0002] Raw coal refers to the raw coal excavated from the ground or underground after screening and processing to remove gangue, pyrite, etc., including natural coke and low-quality coal, excluding low calorific value coal (such as stone coal, peat, oil shale, etc.) Raw coal can be divided into three categories according to its origin: humic coal, sapropel peat and humic peat; according to its degree of carbonization, it can be divided into peat, lignite, bituminous coal, and anthracite. [0003] Raw coal usually contains gangue and other impurities, and these impurities such as gangue usually need to be sorted out in the raw coal treatment process. The current treatment basically uses manual operations to pick up gangue impurities from the conveyor belt, but because some gangue The volume is large, the quality is lar...

AI Technical Summary

Problems solved by technology

[0003] Raw coal usually contains gangue and other impurities, and these impurities such as gangue usually need to be sorted out in the raw coal treatment process. The current treatment basically uses manual operations to pick up gangue impurities from the conveyor belt, but because some gangue The volume is large, the quality is large, and the conveyor belt is wide. This processing method is labor-intensive for workers.

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