敖包山晶质石墨矿工艺矿物学及选矿实验研究  

Study on Process Mineralogy and Purification of Aobao Mountain Graphite Ore from Jiuquan,Gansu Province

作　　者：胡小春 周立波 吕良[2] 申瑞 周定飞 陈飞 HU Xiaochun;ZHOU Libo;LV Liang;SHEN Rui;ZHOU Dingfei;CHEN Fei(Fourth Geological and Mineral Exploration Institute of Gansu Province Bureau of Geological and Mineral Exploration,Jiuquan 735000,Gansu,China;Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,Chinese Academy of Geological Sciences,Zhengzhou 450006,Henan,China)

机构地区：[1]甘肃省地质矿产勘查局第四地质矿产勘查院,甘肃酒泉735000 [2]中国地质科学院郑州矿产综合利用研究所,河南郑州450006

出　　处：《矿产保护与利用》2024年第5期107-114,共8页Conservation and Utilization of Mineral Resources

基　　金：中国地质调查局地质调查项目(DD20243357,DD20230353);甘肃省科技计划项目(22JR5RA819);甘肃省重点人才项目(2023RCXM04);胡小春劳模创新工作室资助。

摘　　要：针对甘肃省酒泉敖包山超大型晶质石墨矿开展了工艺矿物学及选矿实验研究。结果表明,该石墨矿为细鳞片晶质石墨,原矿固定碳含量6.49%,含碳矿物在石墨中的分布率为85.58%,矿石中主要脉石矿物为石英,含量为45.98%,其次为钾长石和斜长石,主要金属矿物为黄铁矿和磁黄铁矿;样品中石墨矿物嵌布粒度主要分布在38~147μm之间,工艺厚度较大,主要在10~20μm。在粗选磨矿细度为−0.074 mm占60%、捕收剂煤油用量90 g/t、起泡剂松醇油用量60 g/t、水玻璃用量500 g/t的条件下,采用“一段粗磨一次粗选、二次扫选、粗精矿六段剥片再磨七次精选,中矿顺序返回”的浮选闭路工艺流程,可获得固定碳品位98.01%、回收率99.22%的精矿产品,产品指标达到高碳石墨标准,可作为膨胀石墨等高性能材料的原料。本研究为此石墨资源的高值化利用提供了技术支撑。An experimental study on process mineralogy,beneficiation and purification of ultra−large crystalline graphite ore from Aobao Mountain in Jiuquan,Gansu Province was carried out.The results showed that the graphite ore was fine flake crystalline graphite,the fixed carbon in the raw ore was 6.49%,the distribution rate of carbon−containing minerals in the graphite was 85.58%,the main gangue mineral was quartz,the content was 45.98%,followed by potassium feldspar and plagioclase,and the main metal minerals were pyrite and pyrrhotite.The distribution size of graphite mineral in the sample was mainly between 38~147μm,and the process thickness was large,mainly 10~20μm.Under the condition that the fineness of rough grinding was 60%−0.074 mm,the amount of rough collector kerosene was 90 g/t,the amount of foaming agent pine oil was 60 g/t,and the amount of water glass was 500 g/t,the closed−circuit flotation process of"one rough grinding,one rougher,two scavenging,six cleanings and seven re−grinding,and the middle ore is returned in sequence"was adopted.The concentrate product with fixed carbon grade of 98.01%and recovery rate of 99.22%could be obtained,and the product index reached the high carbon graphite standard,which could be used as the raw material of high performance materials such as expanded graphite.This study provided technical support for the high value utilization of graphite resources.

关 键 词：敖包山 晶质石墨矿 鳞片石墨 工艺矿物学 浮选 剥片磨矿 

分 类 号：TD975.2[矿业工程—选矿]