青海低品位磷灰石型磷矿浮选试验研究  

Experimental Study on Flotation of Phosphorite Ore from a Low-grade Apatite Deposit in Qinghai

作　　者：刘长淼[1,2] 卫敏[1,2] 吴东印[1,2] 吕子虎[1,2] 赵登魁[1,2] 方霖[1,2] 郭珍旭[1,2] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]国土资源部多金属矿评价与综合利用重点实验室,河南郑州450006

出　　处：《矿冶工程》2014年第3期29-32,共4页Mining and Metallurgical Engineering

基　　金：国土资源部地质矿产评价专项项目(12120113088200);国家自然科学基金项目(U1304519);中国地质调查局百名青年地质英才培养计划资助

摘　　要：对青海某低品位磷灰石型磷矿进行了浮选试验研究。原矿经粗磨后,可抛除约20%的粗粒黑云母和透辉石。抛尾后试样经再磨后,采用氧化石蜡皂和2#药作为捕收剂,在无碱条件下,开路试验获得的磷精矿P2O5品位为35.41%、P2O5作业回收率为87.24%。闭路流程试验获得了磷精矿P2O532.01%、P2O5作业回收率达97%的良好结果。采用可溶性淀粉可有效抑制磷精矿中的含镁矿物,从而获取合格的磷精矿。Flotation test of a low-grade phosphorite ore from Qinghai was carried out. Around 20% of the primary grinding product, containing mainly coarse black mica and diopside, could be discarded. Then after regrinding process, with wax soap and 2#reagent as collectors and no alkaline for regulating the pulp, a phosphorus concentrate with P2 05 grade and operation recovery of 35.41% and 87.24%, respectively, was obtained from the open-circuit test, while a phosphorus concentrate with P205 grade and the operation recovery of 32.01% and 97%, respectively, obtained from the closed-circuit test. The study shows that, the magnesium-bearing minerals can be effectively depressed by soluble starches, which can ensure the quality of phosphorus concentrate.

关 键 词：磷灰石 粗粒抛尾 浮选 降镁 磷矿 

分 类 号：TD923[矿业工程—选矿]