陕西汉中某石英砂提纯试验研究  

Experimental Study on the Purification of Quartz Sand from Hanzhong,Shaanxi Province

作　　者：李育彪[1,2] 魏桢伦 李诗浩 曹书琴 宋银博 LI Yubiao;WEI Zhenlun;LI Shihao;CAO Shuqin;SONG Yinbo(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,Hubei,China;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,Hubei,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070

出　　处：《矿产保护与利用》2022年第5期70-74,共5页Conservation and Utilization of Mineral Resources

基　　金：湖北省重点研发计划项目(2021BCA127);中央高校基本科研业务费专项资金资助(WUT:2021CG006,2022CG032);国家大学生创新创业训练计划项目(S202210497334)。

摘　　要：随着光伏产业的迅猛发展,光伏用石英砂的需求急剧增加。为了充分利用我国储量丰富的低品质石英资源制备光伏用石英砂,对陕西汉中某SiO_(2)含量为97.228%、Fe_(2)O_(3)含量为1331.69μg/g的石英砂矿进行系统的工艺矿物学研究,探究其杂质赋存状态,发现Fe元素赋存状态复杂,主要存在于赤褐铁矿、含铁金红石、铁染云母和电气石中。通过磁选—擦洗—浮选—酸浸的联合工艺去除杂质,最终得到SiO_(2)含量为99.949%、Fe_(2)O_(3)含量为62.41μg/g的优质光伏用石英砂。整体而言,Fe_(2)O_(3)的去除率为95.31%,其中磁选作业的去除率为43.87%,擦洗、浮选和酸浸作业的贡献分别为3.73%、21.18%和26.53%。本研究开发的技术路线的进一步推广,可助推我国光伏产业的快速发展,取得较好的社会经济效益,为双碳政策的顺利实施提供技术保障。The demand of photovoltaic quartz sand increases sharply with the rapid development of photovoltaic industry.In order to fully use abundant low-quality quartz in our country to prepare photovoltaic quartz sand,the systematic process mineralogy of quartz sand(SiO_(2)and Fe_(2)O_(3)were 97.228%and 1331.69μg/g,respectively)from Hanzhong,Shaanxi Province,was studied to investigate the occurrence of iron-containing impurities.The results showed that the occurrence state of Fe was complex,mainly existing in hematite,iron-bearing rutile,iron-stained mica and tourmaline.These impurities were removed through a combined process of magnetic separation-scrubbing-flotation-acid leaching,finally the high-quality photovoltaic quartz sand was obtained with SiO_(2)and Fe_(2)O_(3)being of 99.949%and 62.41μg/g,respectively.Overall,the removal of Fe_(2)O_(3)was 95.31%,with the contribution from magnetic,scrubbing,flotation and acid leaching separation being of 43.87%,3.73%,21.18%and 26.53%,respectively.Therefore,the application of the purification technology developed in this study can promote the development of photovoltaic industry in China,achieving better social and economic benefits and providing technical supports for the two-carbon policy.

关 键 词：石英砂 工艺矿物学 提纯 浮选 酸浸 

分 类 号：TD973.3[矿业工程—选矿]