Sorting process suitable for treating fine-grain refractory coking coal with high coal content

Abstract

The invention provides a separation process suitable for treating fine-grain coking coal with high coal content and difficult to separate, and belongs to the technical field of fine-grain coking coal separation. The separation process suitable for treating the fine-grain refractory coking coal with the high middling coal content comprises the following separation steps that S1, medium gangue magnetic tailings achieve separation treatment on the coking coal through a grading cyclone; s2, inputting the clean coal into a grading cyclone through clean coal magnetic tail to realize separation treatment on the coking coal; s3, a flotation roughing system adopts a one-roughing and one-sweeping procedure; according to the process, a two-section three-product flotation process is adopted, so that useful components are fully recycled while the quality of flotation clean coal and tailings is ensured; the medium gangue magnetic tailing fine fraction is subjected to flotation and scavenging links, so that full recovery of middling coal is guaranteed, and pollution of clean coal products is avoided; the method can well adapt to coal quality fluctuation of a separation plant, that is, TBS underflow coal leakage products are finally fed into middling coal products, and maximum recovery is achieved.

Description

technical field [0001] The present application relates to the technical field of fine-grained coking coal separation, in particular, to a separation process for fine-grained refractory coking coal with high coal content. Background technique [0002] With the large-scale transportation of mechanized mining and the large-scale application of dense medium coal preparation technology, the phenomenon of high fine-grained slime content in the selected raw coal has been brought about. At the same time, the phenomenon that coking coal is often accompanied by high content of medium coal brings the problem that the content of medium coal in fine-grained slime is generally high for the coal preparation process of coking coal, resulting in an increasing proportion of fine-grained refractory coking coal. . As the reserves of high-quality coking coal (such as gas coal and fat coal) are increasingly scarce due to the large-scale mining of coal resources, there is an urgent requirement fo...

AI Technical Summary

Problems solved by technology

In the two processes, in order to ensure the quality requirements of flotation clean coal, the ash content of tailing coal slime products is often low, the recovery of coal products in coking coal is insufficient, and the high ash fine mud in medium coal products often leads to flotation Clean coal pollution, thereby reducing product quality

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