PAM对煤油乳化及煤泥浮选的影响

Influence of PAM on oil emulsified and slurry floatation

为研究阴离子聚丙烯酰胺(PAM)对煤油乳化液稳定性及煤泥浮选效果的影响,采用机械搅拌方式,选择不同体积分数的PAM进行煤油乳化实验,并以煤油、煤油+PAM、煤油乳化液、煤油乳化液+PAM为捕收剂进行单元浮选对比实验。结果表明:在煤油乳化液制备过程中加入少量PAM水溶液可提高煤油乳化速度,增强乳化液的稳定性;当油水比为1∶1,乳化剂用量为1%时,PAM体积分数为21%的乳化液的稳定性最好;随着PAM体积分数的增加,浮选效果逐步改善,当PAM过量时,浮选效果降低;与纯煤油浮选结果相比,煤油+PAM、煤油乳化液和煤油乳化液+PAM的浮选指标有不同程度的改善,且后两者的煤油消耗量降低50%。

In order to study the impact of PAM on the kerosene emulsion stability and the coal slurry flotation effects, this paper discusses the kerosene emulsification experiment carried out, choosing different volume contents in a mechanical rabble way and the unit flotation contrast experiment carried out, using kerosene, kerosene ＋ PAM, kerosene emulsion and kerosene emulsion ＋ PAM as collector. The result shows that addition of a small amount of PAM aqueous solution to the process of kerosene emulsion preparation leads to an improvement in the speed of kerosene emulsification and an increase in the stability of emulsion; when the oil-water ratio is 1：1 and the emulsifier is 1%, the emulsion （with the PAM content of 21% ） shows the best stability; the increase in volume of PAM, gives gradually improved flotation effect, and the decrease occurs in flotation effect , when the PAM volume is excessive. Compared with the pure kerosene flotation results, the flotation indexes of kerosene ＋ PAM, kerosene emulsion and kerosene emulsion ＋ PAM show improvement to varying degrees and 50% decrease in the kerosene consumption.