川西伟晶岩型锂辉石矿选择性磨矿—强化浮选试验研究  

Experimental Study on the Selective Grinding-Strengthening Flotation of the Western Sichuan Pegmatite Spodumene Ore

作　　者：徐龙华[1,2,3] 田佳[1] 巫侯琴[1] 邓伟[4] 王进明[1] 王振[1] 

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]中南大学资源加工与生物工程学院,长沙410083 [3]矿物加工科学与技术国家重点实验室,北京102628 [4]中国地质科学院矿产综合利用研究所,成都610041

出　　处：《有色金属（选矿部分）》2017年第4期52-57,共6页Nonferrous Metals（Mineral Processing Section）

基　　金：国家自然科学基金资助(51674207;51304162);矿物加工科学与技术国家重点实验室开放研究基金专项(BGRIMM-KJSKL-2016-03);中国地调局基础性公益性地质矿产调查项目(DD20160074-6);西南科技大学实验技术研究项目(16syjs11)

摘　　要：川西伟晶岩型锂辉石矿中锂辉石普遍结晶较大、易于解离且在碎磨过程中容易细化,而入选锂辉石矿样的粒度对浮选结果具有很大的影响,采用选择性磨矿—强化浮选的工艺来加强对锂辉石的回收。试验确立了最佳的磨矿条件:钢球球径配比制度为35 mm∶30 mm∶25 mm∶15 mm=2∶5∶3∶7,钢球充填率为30%,磨矿时间为8 min,磨矿浓度为65%。在这一最佳的磨矿条件下可以生产最大量的有利于锂辉石浮选分离的中粒级-74+38μm产品。磨浮选工艺闭路试验可获得Li2O品位5.81%、回收率79.52%的锂精矿。The spodumenen in the Western Sichuan pegmatite spodumene ore generally has large crystal and can be easily crushed and dissociated. What＇ s more, spodumene can be easily refined during crushing and grinding process. However the size of spodumene has an important influence on the flotation result. In this article, we would like to use the technology of ＂Selective Grinding-Strengthened Flotation＂ to strengthen the recovery of spodumene. The optimum grinding conditions were established in the study. Under this optimum grinding conditions, most of the medium size products （-74 ＋ 38μm） which can be used for the separation of spodumene are produced. The ball diameter ratio is selected as： 35 ram： 30 mm： 25 mm： 15 mm =2： 5： 3： 7; the filling rate of steel ball is selected as 30% ; the grinding time is selected as 8min;the grinding concentration is selected as 65%. The study also shows that the Li2O grade of 5.81% and lithium concentrate of 79.52% can be achieved in the closed circuit test of grinding flotation process.

关 键 词：伟晶岩 锂辉石 选择性磨矿 强化浮选 

分 类 号：TD955[矿业工程—选矿] TD923