炼焦中煤柱浮选试验研究  

Experimental study on flotation of coking coal middlings using flotation column

作　　者：孙凤杰[1,2] 陶秀祥 

机构地区：[1]中国矿业大学化工学院,江苏徐州221008 [2]中国矿业大学煤炭加工与高效洁净利用教育部重点实验室,江苏徐州221116

出　　处：《选煤技术》2017年第6期1-4,共4页Coal Preparation Technology

基　　金：国家自然科学基金项目(51574235)

摘　　要：以山西新裕选煤厂重介中煤为研究对象,通过破碎、细磨释放中煤有机组分,利用旋流和无旋流两种进气结构的浮选柱进行了浮选对比试验,研究结果表明:旋流进气结构的浮选柱在大充气量时,中煤可燃体回收率可达66.67%;无旋流进气结构的浮选柱在较小的充气量时,中煤浮选产品灰分可降至10.31%。在此基础上,针对中煤特点提出了"重选+粗选+精选"的中煤再选工艺。The middlings product of the heavy-medium separation system of Xinyu Coal Preparation Plant, Shanxi Province, is used as the object of study. Comparative test is carrried out using 2 kinds of flotation columns which differ in air inlet structure--one swirl type and one non-swirl type, with the middlings as the feed after liberation of organic matters through first crushing and then fine grinding. Test result indicates that： when the swirl-type column works：with a larger aeration quantity, the recovery rate of combustible matter is up to 66.67% ; and when the non-swirl version works with a smaller aeration volume, the ash of the flotation concentrate can be reduced to 10.31%. Based on the test result and in the light of the characteristics of the coking coal middlings, it is proposed to treat the middlings with heavy- medium separation ＋ rougher

关 键 词：中煤再选 柱浮选 充气量 可燃体回收率 

分 类 号：TD943[矿业工程—选矿]