Clean coal recycling method

The invention provides a clean coal recycling method. The clean coal recycling method comprises the following steps: S1, carrying out low-ash flotation treatment on coal; s2, dividing the raw coal into common ash raw coal and low ash raw coal; s3, the low-ash heavy-medium middling coal is transferred again and cleaned in a re-washing mode; and S4, backwashing the product obtained by backwashing the low-ash raw coal. According to the novel washing and selecting pattern, the average ash content of low-ash heavy media is increased by 0.17%, the average ash content of flotation is increased by 0.62%, the ash content of tailings is increased by 9.03%, the increase of the ash content means the increase of the yield, the heat productivity of by-products can be effectively reduced, the heat productivity of the by-products is remarkably reduced compared with that of the traditional washing and selecting condition, and the production cost is reduced. According to the method, the lost clean coal in the middling coal and