东鞍山含碳酸盐难选铁矿石分步浮选工艺研究

介绍了东鞍山烧结厂含碳酸盐难选铁矿石的工艺矿物学及浮选分离特性，提出了处理难选碳酸盐铁矿的浮选新工艺--分步浮选，即第一步在中性条件下采用正浮选分选菱铁矿；第二步在高pH值下采用反浮选分选赤铁矿。实验室闭路浮选试验结果表明，在浮选给矿品位为52.30% 时，采用分步浮选工艺可以获得铁品位 66.34%、回收率71.60%的铁精矿。

Investigation on Stepped-Flotation Process for Donganshan Carbonate-Containing Refractory Iron Ore

The paper describes the technological mineralogy and flotation-separation characteristics of Donganshan carbonate-containing refractory iron ore and puts forward a new process for treating this kind of ore, stepped flotation. It consists of first separating the siderite by direct flotation in neutral medium and then separating hematite by indirect flotation. The closed-circuit laboratory test results show that an iron concentrate grading 66.34% iron with an iron recovery of 71.6% can be obtained from a flotation feed grading 52.3% by stepped flotation process.