改善高浓度煤泥水浮选效果的组合柱浮选工艺  

Enhanced separation of high concentration coal slurry by a two stages process with different flotation columns

作　　者：谢广元[1,2] 倪超[1] 张明[3] 刘博[1] 代立琪 王学霞[1] 彭耀丽[1,2] 沙杰[1,2] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116 [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 [3]昆士兰大学化工学院

出　　处：《煤炭学报》2014年第5期947-953,共7页Journal of China Coal Society

基　　金：高等学校博士学科点专项科研基金资助项目(20110095120021);中央高校基本科研业务费专项资金资助项目(2010QNB08);江苏省2013年度普通高校研究生科研创新计划资助项目(CXLX13_953)

摘　　要：为改善高浓度煤泥水的浮选效果,结合喷射式浮选柱（JFC）与旋流微泡浮选柱（FCMC）的分选优势,构建了JFC与FCMC组合工艺试验系统（JFC＆FCMC系统）,对比分析了FCMC及JFC＆FCMC系统处理高浓度煤泥水的分选指标。结果表明：精煤灰分相当的前提下,与FCMC相比,入料浓度为100,120,140,160 g/L时,JFC＆FCMC系统的精煤产率分别提高2.85%,1.82%,0.93%,1.20%,平均提高1.70%;浮选完善指标分别提高1.17%,0.56%,1.48%,1.59%,平均提高1.20%;0.50~0.25 mm煤泥的浮选完善指标分别提高8.22%,6.15%,8.83%,9.51%,平均提高8.18%。JFC＆FCMC系统能充分发挥JFC与FCMC的优势,实现高浓度煤泥水的全粒级高效分选,与FCMC相比,显著改善整体分选效果,且浓度越高,分选优势越明显。In order to improve effect separation of high concentration coal slurry, a jet flotation column （ JFC ） and a cyclonic microbubble flotation column （FCMC） was adopted to comprise a two stage flotation system （JFC＆FCMC） combining advantages of the two flotation columns. A favorable performance was obtained in treating high concentration coal slurry with the JFC＆FCMC flotation system when compared with that of the single stage FCMC system. The com parison of results at the same clean coal ash level indicate that, when feed concentrations are set at 100,120, 140,160 g/L,clean coal yields of JFC＆FCMC system are 2. 85% , 1.82% ,0. 93% , 1.20% higher （1.70% on aver age） respectively than that of single stage FCMC,flotation perfect indexes of all size fractions are 1.17% ,0.56% , 1.48% , 1.59% higher （1.20% on average） respectively ,while a more significant increase is obtained at the 0.50 -0. 25 mm coal slime,whose flotation perfect index are 8.22% ,6. 15% ,8.83% ,9.51% higher （8. 18% on average）in each concentration. So it can be concluded that JFC＆FCMC system can combine the advantages of JFC and FCMC whereby separating whole fraction of high concentration coal slurry effectively. Its superiority over FCMC in treating high concentration coal slurry rises with the coal slurry concentration.

关 键 词：高浓度 煤泥水 浮选柱 组合工艺 

分 类 号：TD94[矿业工程—选矿]