中文摘要：

以贵州西部汪家寨选煤厂入浮煤泥为研究对象,进行了粒度分析、小浮沉试验、分步释放试验和药剂制度探索等试验。结果发现,该厂煤泥中-0.045mm粒级的占43.30%,灰分达47.97%,此外,由小浮沉试验结果绘制的可选性曲线看出,灰分曲线较为陡峭,可以判断该厂煤泥为高灰细粒难选煤泥。通过对捕收剂（柴油、正十二烷）、起泡剂（二号油、仲辛醇、MIBC）种类和用量的探索发现,当矿浆浓度选择110g/L,捕收剂选择正十二烷（270g/t）,起泡剂选择MIBC（6g/t）时,精煤产率为38.91%,灰分为11.14%,尾煤灰分为45.53%。

英文摘要：

High ash fine coal slime in western Guizhou was taken as study object in this paper. Size analysis,small float-sink test and flotation reagent system exploration were operated subsequently. Results show that,the fine coal slime with size range lower than 0. 045 mm accounts for 43. 30%,with ash content up to 47. 97%,along with washability curves based on small float-sink test（ ash curves is very steep）,a conclusion can be obtained that this coal slime is high ashdifficult to flotation-fine coal slime. Different collectors（ diesel oil and n-dodecane）,foaming agent（ terpenic oil,DL-2-Octanol and MIBC） were compared as well. Results show when slurry concentration is 110 g / L,collector chosen n-dodecane with concentration of 270 g / t,foaming agent chosen MIBC with concentration of 6g / t,yield of flotation clean coal is 38. 91%,with ash content of 11. 14%,while that of tailing coal is 45. 53%.