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高灰难选煤泥抑制剂降灰提质试验研究

发表时间:2012-03-31  浏览量:1246  下载量:465
全部作者: 李吉辉,马力强,桂夏辉,程敢,王强
作者单位: 中国矿业大学(北京)化学与环境工程学院;中国矿业大学化工学院
摘 要: 分析高灰难选煤泥精煤灰分高的原因,并介绍抑制剂在煤泥浮选中降灰的机理及作用。在相同的实验室条件下,分别利用水玻璃、六偏磷酸钠和苛性淀粉3种抑制剂进行对比试验,结果表明:在浮选高灰难选煤泥时,六偏磷酸钠的抑制效果优于水玻璃和淀粉。当浮选入料灰分为22.87%,六偏磷酸钠用量为1 500 g/t时,与不加抑制剂的常规浮选相比精煤灰分下降了1.05%,同时精煤产率上升5.52%.
关 键 词: 选矿技术;高灰难选煤泥;浮选;抑制剂;降灰提质
Title: Studies on the ash declining and quality improving of depressant in flotationof difficult preparation of high ash coal slime
Author: LI Jihui, MA Liqiang, GUI Xiahui, CHENG Gan, WANG Qiang
Organization: School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing); School of Chemical Engineering and Technology, China University of Mining and Technology
Abstract: This paper discusses the causes that give rises to the high ash content in the high ash and difficult prepared slime floatation, and introduces the mechanism and effect of depressant in the coal slime floatation. A series balance experiments are performed under the same condition with water glass, sodium haxametaphosphate and caustic amylum as various depressants. The results show that sodium haxametaphosphate has the best depressant effect in them. Under the conditions that the ash of the feed is 22.87%, the does of sodium haxametaphosphate is 1 500 g/t, the ash of cleaning coal falls by 1.05 percentage points, and its recovery rate rises by 5.52 percentage points than the common floatation without depressants.
Key words: mineral separation technology; difficult preparation of high ash coal slime; flotation; depressant; ash declining and quality improving
发表期数: 2012年3月第6期
引用格式: 李吉辉,马力强,桂夏辉,等. 高灰难选煤泥抑制剂降灰提质试验研究[J]. 中国科技论文在线精品论文,2012,5(6):502-506.
 
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