某尾矿回收低品位磷矿物的选矿试验研究

Experimental Study on Mineral Processing of Recycling Low-grade Phosphorus Minerals for a Tailing

内蒙古某尾矿中磷灰石矿物的分布率为9.25%,P_(2)O_(5)含量仅为3.73%,属于低品位磷矿物。针对磷灰石入选品位低、含钙的脉石矿物种类多、可浮性相近的难点问题,采用碳酸钠为pH调整剂、水玻璃和HSL为抑制剂、改性脂肪酸TQHY为捕收剂,在条件试验的基础上,进行了一次粗选、二次精选的开路试验,获得了P_(2)O_(5)品位33.02%、回收率78.67%的磷精矿,取得了较好的选别指标。

The distribution law of apatite mineral in a tailing of Inner Mongolia is 9.25%and content of P_(2)O_(5) is only 3.73%so that it is low-grade phosphorus mineral.Based on the condition experiment,the open circuit test of primary rougher flotation and secondary concentration is carried out with sodium carbonate as the pH adjusting agent,water glass and HSL as the depressor as well as modified fatty acid TQHY as the collecting agent aiming at the difficult problems of low grade of apatite,many types of gangue mineral containing calcium and similar floatability.Finally,the phosphate concentrate with the grade of P_(2)O_(5) of 33.02%and recovery rate of 78.67%is obtained as well as good separating indexes are obtained.