辛基酚聚氧乙烯醚表面活性剂对煤泥浮选的促进作用研究

Promotion effect of octylphenyl ethoxylate surfactant series on coal slime flotation

以辛基酚聚氧乙烯醚(OP)系列表面活性剂与煤油复配作为捕收剂对屯兰煤进行浮选研究,并对不同捕收剂在水中的分散度及浮选精煤的接触角进行测定。结果表明,OP与煤油复配有明显增效作用,其中OP-4与煤油的复配效果较优,相对于等量的煤油,精煤产率提高11.87个百分点,尾煤灰分提高17.85个百分点,可燃体回收率提高12.91个百分点,浮选完善度提高3.12个百分点。OP与煤油复配可提高煤油在水中的分散度,提升浮选精煤的接触角,即增强煤的疏水性,从而起到增效作用。

Octylphenyl ethoxylate（ OP） surfactant series was blended with kerosene to be used as collecting agent for flotation of coal slime from crude coal of Tunlan coal mine. Dispersity of separate collecting agent in water as well as contact angle of the refine coal was measured and determined. Results showed that the blends of OP and kerosene display obvious promotion effects on the flotation of coal slime and the blend of OP- 4 and kerosene displays better effect than others in the series. As comparing with the same dosage of kerosene singly,the yield of refined coal and ash content of tailing coal increases 11. 87 and 17. 85 percentage points respectively; as well as the combustible recovery and flotation perfect index,increases 12. 91 and 3. 12 percentage points respectively. It indicated that the promotion effect is enhanced due to the improvement of diffusion of kerosene in water,and the upgrading of contact angle of the refined coal,which lead to improvement of its hydrophoby.