Dense medium continuous coal washing process and raw coal continuous crushing method

Abstract

The invention provides a dense medium continuous coal washing process and a raw coal continuous crushing method. The dense medium continuous coal washing process comprises the following steps that (1) dense medium suspension liquid is configured in a medium storage tank for standby application; (2) raw coal is conveyed into a raw coal crusher in circulating coal crushing equipment to be crushed and enters a classifier; (3) the raw coal crushed in the step 2 is picked out through the classifier; (4) raw coal materials stored in a raw material storage tank are conveyed into a three-product dense medium hydrocyclone; (5) coal washing media in the step four are recycled through medium removing equipment to obtain water contained clean coal, water contained middling coal and water contained gangue with the media removed; (6) dehydration treatment is carried out on the water contained clean coal, the water contained middling coal and the water contained gangue with the media removed in the step 5 through dehydration equipment, and the finished products of the clean coal, the middling coal and the gangue are respectively obtained. The coal can be washed continuously, the coal does not need to be manually transferred between all the equipment in the coal washing process, the dense medium continuous coal washing process and the raw coal continuous crushing method are suitable for being popularized and applied in a large range in coal industries, and the overall raw coal washing rate of the coal industries is improved.

Description

technical field [0001] The invention relates to a coal washing process, in particular to a dense medium continuous coal washing process and a raw coal continuous crushing method. Background technique [0002] Coal washing is an important process in the deep processing of coal. After the raw coal is washed, the impurity content carried by it is greatly reduced, and the pollutants and ash produced after combustion are greatly reduced, realizing the clean utilization of coal. However, due to the lack of connection between various equipment such as crushers and screening machines used in the current coal washing process, the raw coal needs to be manually transferred to the next process after crushing and screening. The existing coal washing operation is more cumbersome and continuous production cannot be formed, and the coal washing operation needs to consume a lot of labor costs and transportation equipment costs. Considering that the coal washing step is omitted, the raw coa...

AI Technical Summary

Problems solved by technology

When coal-fired enterprises use unwashed raw coal as fuel, the pollutants emitted will increase significantly compared with burning clean coal, and the combustion efficiency is very low. The ash content in raw coal is high, and it is difficult to clean up the residue after combustion. In addition, since most of my country's coal-producing areas are far away from economically developed areas with large coal consumption, the coal transportation volume is large and the transportation distance is long. The average coal transportation distance is about 600 kilometers. a lot of capacity

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