含碳酸盐铁矿石一步反浮选中药剂的作用

探索了矿浆pH值、分散剂和辅助捕收剂对含碳酸盐铁矿石一步直接反浮选影响.浮选实验结果表明，矿浆pH值由11.0增加到11.8时铁精矿品位陡增，pH值等于11.8时品位达到最高，此后品位变化不明显.矿浆pH值为12.0时，三聚磷酸钠是有效分散剂，十二烷基磺酸钠是KS-Ⅲ有效辅助捕收剂，两种药剂都可同时提高铁精矿的品位和回收率.理论计算表明，浮选实验结果与菱铁矿的浮选溶液化学行为以及颗粒间的相互作用有关.药剂结构性能计算表明，十二烷基磺酸钠在铁矿石阴离子反浮选中有良好的选择性、乳化性和溶解性.

Effect of flotation reagents on direct reverse flotation of carbonate-containing iron ores

The effects of pulp pH values, dispersants and auxiliary collectors on direct reverse flotation of carbonate-containing iron ores were explored. Floatation experiment results show a sharp increase in iron grade as the pH value raises from 11.0 to 11.8, and the maximum grade can be obtained at pH 11.8, after which the iron grade has almost no change. When the pH value is 12.0, sodium tripolyphosphate is a kind of effective dispersant and sodium dodecyl sulfate is an effective auxiliary collector of KS-Ⅲ, both the iron recovery and grade increase with the action of sodium dodecyl sulfate or sodium tripolyphosphate. Theoretical calculations indicate that the floatation results are related to the solution chemistry of siderite and interactions between particles. Structure-activity calculations of collectors show that sodium dodecyl sulfate has perfect selectivity, emulsion and solubility.