摘要
气化渣是煤化工行业主要固体废弃物,借助选矿手段可以有效将气化渣中的未燃碳与硅酸盐相分离,增加其工业利用价值。分析了气化渣重选精矿(富碳气化渣)的比表面积、红外光谱仪和X射线光电子能谱,研究了气化渣的可浮性行为。试验结果表明,富碳气化渣比表面积为286.32m^(2)/g,平均孔径为3.30nm,其表面含有大量含氧官能团,碳原子与氧原子含量别为52.32%和42.42%,表面亲水性较高。采用月桂酸甲酯和煤油复配捕收剂+十二烷基苯磺酸钠+二步浮选法浮选效果最好,精矿灰分为27.47%,精矿产率为8.23%。
Gasification slag is the main solid waste in the coal chemical industry,and with the help of beneficiation means,the unburned carbon and silicate phases in gasification slag can be effectively separated to increase its industrial utilization value.The specific surface area,infrared spectroscopy and X-ray photoelectron spectroscopy of gasification slag reelected concentrate(carbon-rich gasification slag)were analyzed,and the floatable behavior of gasification slag was studied.The test results showed that the specific surface area of the carbon-rich gasification slag was 286.32 m^(2)/g,the average pore size was 3.30 nm,and its surface contained a large number of oxygen-containing functional groups,with the contents of carbon atoms and oxygen atoms of 52.32%and 42.42%,respectively,and the surface hydrophilicity was high.The best flotation effect was achieved by using methyl laurate and kerosene compound collector+sodium dodecylbenzene sulfonate+twostep flotation method,with a concentrate ash content of 27.47%and a concentrate yield of 8.23%.
作者
孙小乐
睢月婷
南凯
史培阳
SUN Xiaole;SUI Yueting;NAN Kai;SHI Peiyang(Mining Research Institute of Baotou Steel(Group)Corp,Baotou 014000,China;Key Laboratory for Ecological Metallurgy of Multimetallic Ores Ministry of Education,Northeastern University,Shenyang 110819,China)
出处
《中国资源综合利用》
2024年第8期103-106,共4页
China Resources Comprehensive Utilization
关键词
气化渣
比表面积
亲水性
浮选
gasification slag
specific surface area
hydrophilicity
flotation
