李家沟伟晶岩型锂辉石矿床是中国四川松潘-甘孜褶皱带中部可尔因矿田中的典型矿床之一.经过最新的勘探评估工作,李家沟矿床已被确定为超大型锂辉石矿床,备受国内外学者关注,且李家沟矿床矿石工艺特征随高程而变化,急需正确评价李家沟矿床矿石的工业价值.本文在详细的镜下以及手标本观察的基础上,通过X射线粉晶衍射(XRD)、电子探针(EPMA)、激光剥蚀等离子体质谱仪(LA-ICP-MS)、化学全元素分析、化学物相分析、矿物参数自动分析系统(MLA)等方法和技术,查清矿石组成,确定有益、有害元素种类与赋存状态,查明矿石工艺性质,为该区稀有金属资源的综合利用提供理论和技术支持.锂矿石平均品位0.94％,约84.7％的Li来自锂辉石,矿石中Rb2O平均品位0.13％,达到了综合回收伴生元素工业品位要求.锂辉石粒度范围较宽,属于极不均匀矿石,需多段磨矿.根据矿石解离度特征,在进入最终浮选工艺前,建议将物料磨至-0.075 mm.
Study on process mineralogy of spodumene in Lijiagou deposit,Ke'eryin ore field,western Sichuan
The Lijiagou pegmatite-type lithium spodumene deposit is one of the typical deposits in the Ke'eryin ore field,located in the central part of the Songpan-Ganzi fold belt in Sichuan Province,China.Through recent explo-ration and assessment,the Lijiagou deposit has been identified as a super-large spodumene deposit,drawing signifi-cant attention from domestic and international scholars.The mineral processing characteristics of the Lijiagou depos-it vary with elevation,necessitating an accurate evaluation of the industrial value of the ore.Based on detailed mi-croscopic and hand specimen observations,this study employs various methods and techniques,including X-ray powder diffraction(XRD),electron probe microanalysis(EPMA),laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS),chemical element analysis,chemical phase analysis,and the mineral liberation analy-zer system(MLA).These methods and techniques are used to determine the composition of the ore,identify the types and occurrence states of beneficial and harmful elements,and clarify the ore's processing properties.The re-sults will provide theoretical and technical support for the comprehensive utilization of rare metal resources in the re-gion.The average grade of lithium ore is 0.94％,with approximately 84.7％of Li derived from spodumene.The average grade of Rb2O is 0.13％,meeting the industrial-grade requirements for comprehensive recovery of associat-ed elements.The spodumene exhibits a wide range of grain sizes and is highly heterogeneous,requiring multiple stages of grinding.Based on the liberation characteristics,it is recommended to grind the material to-0.075 mm before entering the final flotation process.
万方数据
维普
