超细粒级含锂矿泥浮选回收锂试验研究  

Experimental Study on Flotation Recovery of Lithium from a Ultra-fine Lithium-containing Ore Mud

作　　者：康金星 刘志国[1,2,3] 姜志学 王亚运 王鑫 KANG Jinxing;LIU Zhiguo;JIANG Zhixue;WANG Yayun;WANG Xin

机构地区：[1]中国恩菲工程技术有限公司,北京100038 [2]中国冶金科工集团有限公司,北京100028 [3]中国五矿集团公司,北京100027

出　　处：《中国矿山工程》2025年第1期63-68,共6页China Mine Engineering

摘　　要：本研究针对新疆某低品位锂辉石矿水力旋流器脱泥的含锂矿泥,研究了粒度特征、浮选剂及工艺流程对锂回收的影响。结果表明,该细泥中Li_(2)O含量为0.69%,含锂矿物主要为锂辉石,矿物颗粒粒度微小(D_(97)=9.18μm),是一种超细粒难选低品位矿物细泥。以Na_(2)CO_(3)-NaOH-CaCl_(2)复合调整剂进行调浆,以EF1116为锂矿物捕收剂,在实验室闭路条件下,采用快速调浆-一粗一扫二精一精扫-中矿分步分离浮选工艺分选时,相对于细泥给矿获得了Li_(2)O品位为3.89%、回收率为52.95%的锂精矿,锂矿物分选的相对富集比达5.6,其比一粗一扫二精-中矿顺序返回工艺回收率Li_(2)O高出11.5个百分点。本研究为从脱泥产出的矿物细泥再回收锂提供技术和数据参考。The lithium containing ore slurry obtained from a low-grade spodumene mine in Xinjiang through hydraulic cyclone desilting was used in this work.The influences of particle size distribution,flotation reagents,and separation process on the lithium recovery were investigated.The results showed that the Li_2O content in the mud sample was 0.69%,and the mainly lithium-bearing minerals was spodumene.The mineral particle size was very small(D_(97)=9.18μm),suggesting that it an ultra fine and difficult to separation low-grade mineral fine mud.Under the laboratory closed circuit conditions,with the usage of the Na_(2)CO_(3)-NaOH-CaCl_(2)composite modifier as slurry adjustment and EF1116 as lithium minerals collector,a lithium concentrate with a Li_(2)O grade of 3.89%and a recovery rate of 52.95%was obtained relative to the feeding mud when it was used a rapidly slurry adjusting-the one rough flotation—one sweep flotation-two cleaner flotation-one selected-sweep flotation of intermediates stepwise separation process.The relative enrichment ratio of lithium mineral separation reached 5.6,which is 11.5 percentage points of Li_(2)O recovery ratio higher than that of the one rough selection-one sweep flotation-two cleaner flotation of intermediates sequential regurgitation process.This study provides technical and data references for the recovery of lithium from the abandoned mineral fines produced by hydraulic cyclone desliming.

关 键 词：超细粒浮选 矿物细泥 中矿分步分离工艺 中矿顺序返回工艺 相对富集比 

分 类 号：TD952[矿业工程—选矿]