甘肃某低品位磷矿选矿试验研究  

Experimental study on a low grade phosphate ore in Gansu

作　　者：刘长淼[1,2] 吕子虎[1,2] 马驰[1,2] 卫敏[1,2] 吴东印[1,2] 赵登魁[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：《化工矿物与加工》2014年第3期1-4,8,共5页Industrial Minerals & Processing

基　　金：国土资源部地质矿产评价专项项目(No.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：基于工艺矿物学研究,查明甘肃罗家峡磷矿属低品位磷灰石型磷矿,氟磷灰石的矿物质量分数为7.02%。磨矿对比试验结果表明,两段磨矿的浮选指标优于一段磨矿。浮选条件试验结果表明,以氧化石蜡皂为捕收剂,碳酸钠和水玻璃为调整剂,可以有效富集原矿中的磷灰石。采用一粗二扫四精、中矿顺序返回的闭路流程,得到了产率7.78%,含P2O529.04%、含MgO 1.89%,回收率76.56%的磷灰石精矿,采用腐植酸钠降镁后,可获得合格磷灰石精矿。Mineralogical researches show that the phosphate ore from Lujiaxia Phosphate Mine in Gansu is of apatite type and the content of fluorapatite is 7.02%. The comparative tests of grind- ing indicate that two-stage grinding test is superior to one-stage grinding test in flotation indexes. The results of experiments on flotation conditions show that apatite in the crude ore can he con- centrated effectively with oxidized paraffin soap as collector and sodium carbonate and sodium silicate as regulator. The apatite concentrate can be produced in a closed-circuit of once roughing , twice scavenging, four cleanings and middling orderly return with productivity of 7.78%, PzO5 29.04%, content of MgO 1.89% and recovery 76.56%. The desirable apatite concentrate can be obtained by using sodium humate to reduce the content of MgO.

关 键 词：磷灰石 两段磨矿 浮选 降镁 

分 类 号：TD971[矿业工程—选矿]