四川某稀土矿分选技术研究  

Research on the Separation Technology for a Rare-earth Minerals in Sichuan

作　　者：王鑫 康金星 刘志国[1] 王亚运 WANG Xin;KANG Jinxing;LIU Zhiguo;WANG Yayun

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《中国矿山工程》2023年第3期80-84,共5页China Mine Engineering

摘　　要：针对四川某稀土矿选矿工艺存在的稀土回收率低的问题,采用“混合浮选-强磁选”工艺,开展了选矿试验研究。浮选试验结果表明,在矿浆浓度为30%,粗选NaOH用量为300 g/t,水玻璃用量为400 g/t,捕收剂H205+LD用量为300+300 g/t,起泡剂用量为50 g/t条件下,采用一次粗选、四次精选、两次扫选,中矿顺序返回的选矿流程,可获得REO品位为13.82%,浮选作业回收率为84.19%的稀土浮选混合精矿。稀土浮选混合精矿经强磁选抛除重晶石和萤石,可获得稀土稀土精矿的品位为46.63%,作业回收率为89.22%,对原矿的回收率为75.11%。Experimental study is investigated in the rare-earth minerals in Sichuan,in view of the low recovery.And the"Bulk Flotation-High intensity magnetic separation"process was process was adopted.The flotation results indicated that,under conditions of the pulp concentration of 30%,NaOH dosage of 300 g/t,silicate sodium dosage of 400 g/t,H205+LD dosage of 300+300 g/t,frother dosage of 50 g/t,the rare earth concentrate was obtained by using of one roughing,four cleaning,two scavenging,and middles back to the flowsheet in turn.The rare earth flotation mixed concentrate was obtained with REO grade and operating recovery of 13.82%and 84.19%,respectively.The high intensity magnetic separation was used to removing barite and fluorite from the rare earth flotation mixed concentrate.The final concentrate REO grade,operating recovery and total recovery was 46.63%,89.22%and 75.11%respectively.

关 键 词：稀土 浮选工艺 磁选工艺 回收 

分 类 号：TD955[矿业工程—选矿]