| In the face of the state environmental protection situation more and more serious, the clean coal technology is bound to become a trend of the future development of the coal industry. And coal washing and processing as the source and foundation of clean coal technology, it will surely cause the people’s attention. Especially fine grade coal separation and coal slurry system is good or bad, will be for the future development of coal washing and processing have great influence.Renlou mine Coal preparation plant flotation feeding coal marl is divided into high, fine mud flotation separation the effect of high yields, the serious influence of coal slurry system. Analysis on Renlou coal washery coal slime properties through the paper, draw the slime flotability is extremely difficult floated coal flotation in there, about60%of the high dust slime material, the main mineral group high ash slime is kaolinite, moreover also includes quartz, calcite, muscovite. The mineral composition of existence is the main cause of flotation concentrate is too high. In this paper, through a large number of flotation test proved:removing flotation feeding of high ash slime, will obvious improvement effect of coal slurry flotation. Put forward will be the site of slime concentrator transformed into de mud thickener.The flotation feeding desliming flotation feed thickener has buffer action, through the underflow pump frequency measures, can be based on changes in feeding coal, the online control of water rising average velocity, timely adjustment of desliming index.Renlou coal flotation process system can adapt to the raw coal of different quality, can well solve the problem in coal slime water treatment more and more finer, gangue slime is becoming more and more serious brings, worthy of popularization and application in coal preparation plant of other similar problems, it can bring the considerable economic benefit and the social benefit for the coal preparation business. |
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