煤与高岭石的浮选分离试验研究  

Experimental study of flotation separationof coal and Kaolinite

作　　者：陆芳琴[1] 侯宝宏[1] 张明旭[1] 刘令云[1] LU Fangqin;HOU Baohong;ZHANG Mingxu;LIU Lingyun(School of Materials Science and Engineering,Anhui University of Science&Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学材料科学与工程学院,安徽淮南232001

出　　处：《选煤技术》2020年第1期18-21,25,共5页Coal Preparation Technology

基　　金：国家自然科学基金资助项目(51874011)。

摘　　要：为了探索煤泥水中的高岭石与煤浮选分离规律,通过单矿物浮选试验、人工混合矿物浮选试验以及接触角试验分析,研究了正十二烷药剂浓度对煤、高岭石浮选特性规律以及不同混合比例下煤与高岭石的浮选分离特性规律。试验结果表明:正十二烷药剂浓度在800 g/t时,煤与高岭石的单矿物浮选产率差值最大,二者分别为92.12%、42.34%;人工混合矿物浮选分离试验中,不同配比混合矿物都有较好的分离效率,浮选分离效率均大于75%,且当混合比例为1∶1时,浮选分离效率最高,为80.23%;通过接触角的变化可知,相较于高岭石,煤对正十二烷的吸附性更强。In order to explore the law governing the separation of coal and kaolinite in coal slurry water in flotation process,test on flotation of coal and kaolinite in a separate and artificially mixed manner and the test on contact angle of coal and kaolinite is conducted so as to analyze the effect of concentration of collector n-dodecane on flotation characteristics of coal and kaolinite as well as the separation characteristics of the two minerals at different mixing ratios.Test result shows that:in the case of making separate flotation of coal and kaolinite using n-dodecane at a dosage of 800 g/t,a widest difference in recovery rate can be observed between the two,with the former being 92.12%and the latter 42.34%;for flotation of coal and kaolinite in a mixed manner at varying mixing ratios,a fairly good separation result can be expected with a separation efficiency all greater than 75%which can go up to 80.23%at a mixing ratio of 1∶1;and it is noted from the variation of contact angles,in comparison with kaolinite,coal exhibits a higher n-dodecane adsorptivity.

关 键 词：浮选分离 煤 高岭石 正十二烷 人工混合矿物 浮选分离效率 接触角 

分 类 号：TD943[矿业工程—选矿]