重庆某高磷鲕状赤铁矿石提铁降磷试验研究

Experimental Study on Iron Increase and Phosphorus Reduction of a High Phosphorus Oolitic Hematite Ore in Chongqing

重庆巫山桃花高磷鲕状赤铁矿石铁品位较高,赤褐铁占总铁的97.71%,矿石有害成分磷含量较高。为了确定该矿石的开发利用工艺,进行了选矿试验研究。结果表明,矿石在磨矿细度为-0.075 mm占85%、SSS—I—500型双频双立环脉动高梯度磁选机2次粗选背景磁感应强度分别为0.77和0.80 T,脉动冲次均为60 Hz,2次常温反浮选粗选、粗选尾矿1粗1精2扫流程常温反浮选扫选情况下进行全流程试验,获得了铁品位为54.39%、磷含量为0.25%、铁回收率为74.96%的精矿。研究结果说明,针对高磷鲕状赤铁矿,采用强磁选—反浮选工艺能较好地降低磷含量,提高铁品位。

The iron grade of Taohua high phosphorus oolitic hematite ore in Wushan Chongqing,is rel-atively high.The hematite and limonite account for 97.71%of the total iron,and the harmful component phosphorus content of the ore is relatively high.In order to determine the development and utilization pro-cess of the ore,the beneficiation test was carried out.The results showed that when the grinding fineness was 85%of-0.075 mm,the background magnetic induction intensity of SSS-I-500 type double frequency double vertical ring pulsating high gradient magnetic separator of two times roughing was 0.77 and 0.80 T re-spectively,the pulsation frequency was 60 Hz,the process was two times room temperature reverse flotation roughing,roughing tailings one roughing one cleaning two scavenging process room temperature reverse flo-tation scavenging,the whole process test was carried out.The concentrate with iron grade of 54.39%,phos-phorus content of 0.25%and iron recovery of 74.96%was obtained.The results show that the high intensity magnetic separation-reverse flotation process for high phosphorus oolitic hematite can better reduce the phosphorus content and improve the iron grade.