四川可尔因选锂尾矿锂辉石再选实验研究

Re-election of Spodumene from Lithium Processing Tailings in Keeryin,Sichuan

这是一篇矿物加工工程领域的论文。为综合评价四川可尔因选锂尾矿锂辉石再选可行性,开展了选锂尾矿矿石工艺矿物学研究及选矿全流程实验研究。通过MLA/AMICS矿物自动分析、LA-ICP-MS激光剥蚀原位分析等技术手段,查明了该尾矿样品中的矿物成分、样品中锂的赋存状态等;在一系列探索实验的基础上,确定了“磨矿-脱泥-浮锂-强磁除杂”的选锂工艺流程。针对Li_(2)O品位0.51%的选锂尾矿,采用自主研发的高效锂辉石捕收剂EM-PN10,经一粗一扫四精浮选闭路流程,获得了Li_(2)O品位4.32%,Li_(2)O回收率60.23%的浮选锂精矿,浮选锂精矿经强磁除铁后,最终获得了Li_(2)O品位5.07%,回收率(相对于原矿)59.21%的锂精矿产品。实验确定的锂辉石再选回收利用研究成果可为该类选锂尾矿资源利用提供一定技术支撑。

This is an essay in the field of mineral processing engineering.In order to comprehensively evaluate the feasibility of spodumene beneficiation of certain lithium tailings in Sichuan,the mineralogy study of the lithium tailings beneficiation process and the test study of the whole beneficiation process were carried out.Through MLA/AMICS automatic mineral analysis,LA-ICP-MS laser ablation in-situ analysis and other technical means,the mineral composition of the tailings sample and the occurrence state of lithium in the sample were found;On the basis of a series of exploratory tests,the lithium separation process of"grinding-desliming-floating"was determined.For the lithium tailings with a Li_(2O) grade of 0.51%,the high-efficient spodumene collector EM-PN10 is used to obtain a flotation spodumene concentrate with a Li_(2O) grade of 4.32% and a Li_(2O) recovery of 60.23% through a closed flotation process of one roughing,one sweeping and four finishing.After the flotation lithium concentrate is subjected to high-intensity magnetic separation,a spodumene concentrate with a Li_(2O) grade of 5.07% and a recovery of 59.21%(relative to the raw ore) is finally obtained.The recovery and utilization index of spodumene determined by the test can provide certain technical support for the utilization of this kind of spodumene tailings.