regarding to the situations in Guandi coal preparation plant like low flotation efficiency and high ash content,the new reagents like ZFC emulsified oil,Jihua GF oil,2-Octanol and Nalco were used to do the flotation test,how the different dosages affected the flotation effect and the optimization selection test were discussed,the combustible material recovery rate of flotation clean coal and flotation improvement index were adopted to evaluate the floatability of coal slime.The results showed that,along with the increase of flotation dosage,the flotation effect is getting better and better,but an excess of reagents will result in the increase of ash content of clean coal,the flotation effect will become bad;when the dosage of foaming agent was 60g/t,combustible body recovery rate of 2-Octanol reagent reached 78.12%,the flotation improvement index reached 42.47%,combustible body recovery rate of GF oil reagent reached 75.92%,the flotation improvement index reached 38.92%;when the dosage of collector was 400 g/t,the clean coal yields of ZFC emulsified oil and Nalco reached 64.12% and 63.93% respectively;Jihua GF oil and 2-octanol have good foaming effect,ZFC emulsified oil and Nalco have good collecting effect,the test results of coal slime flotation in Guandi coal preparation plant could be improved and the clean coal yield could be increased.%针对目前官地选煤厂煤泥浮选效率低、灰分较高等现状,采用ZFC乳化油、吉化GF油、仲辛醇及纳尔科等新型药剂进行浮选试验,探讨不同药剂用量对浮选效果及其优化选择试验,并采取浮选精煤可燃物回收率和浮选完善指标以评价煤泥的可浮性.试验结果表明:随着浮选药剂剂量的增加,其浮选效果逐渐变好,但过量的药剂会导致精煤灰分增加,浮选效果变差;当起泡剂用量60 g/t时,仲辛醇药剂可燃物回收率达到78.12%,浮选完善指标达42.47%,吉化GF油药剂可燃物回收率达到75.92%,浮选完善指标达38.92%;当捕收剂用量400 g/t时,ZFC乳化油和纳尔科的浮选精煤产率分别可达64.12%、63.93%;吉化GF油和仲辛醇具有良好的起泡效果,ZFC乳化油和纳尔科具有良好的捕收效果,可改善官地选煤厂煤泥浮选试验结果及提高精煤产率.
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