A coal washing medium powder and coal washing process

Abstract

The invention provides a coal washing medium powder and a coal washing process. The content of magnetic substances in the coal washing medium powder is greater than 97.8%, the particle content in the coal washing medium powder is 91.3%, and the sulfur content of the coal washing medium powder is less than 0.1%. The coal washing process includes the following Steps: ① Send the above-mentioned coal washing medium powder into the medium storage tank for standby; ② Send the raw coal into the circulating coal crushing equipment and enter the sorter; ③ The sorter will select the raw coal after being crushed in step ②; ④ Put the raw coal in the raw material storage tank The raw coal materials stored in the internal storage are sent to the three-product dense medium cyclone; ⑤The coal washing medium obtained in step ④ is used to recover the coal washing medium obtained in step ④, and the dense medium suspension is reconfigured; Water-containing coal is dehydrated to obtain clean coal, medium coal and gangue products; the invention can stabilize the ash content in the clean coal obtained after raw coal washing at about 0.5%, and can continuously wash coal, which is suitable for large-scale popularization and application in the coal industry .

Description

technical field [0001] The invention relates to a coal washing medium powder, in particular to a coal washing medium powder and a coal washing process. Background technique [0002] Coal washing is an important process in the deep processing of coal. The ash content carried by the raw coal after washing is greatly reduced, and the pollutants and ash produced after combustion are greatly reduced, realizing the clean utilization of coal. At present, the highest standard for the grade of coal washing medium powder used in the coal industry is that the content of magnetic substances is more than 95%, the particle content of -325 mesh particle size in coal washing medium powder is greater than 90%, and the sulfur content of coal washing medium powder is less than 0.1%. The coal washing medium powder can reduce the ash content in the clean coal to about 2% after washing the raw coal. In the actual production process, most batches of coal washing medium powder that meet the above s...

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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