青海拉陵高里河下游某难选铜锌矿石工艺矿物学研究  

Process Mineralogy of a Refractory Copper-zinc Ore in the Lower Reaches of Gaoli River,Laling,Qinghai

作　　者：张慧婷 赖春华[1,2,4] 冯媛媛 王朝 谢兰馨 翁存建 ZHANG Huiting;LAI Chunhua;FENG Yuanyuan;WANG Zhao;XIE Lanxin;WENG Cunjian(Technology Development of Western Mining Group Co.,Ltd.,Xining 810006,China;Qinghai Province Key Laboratory of Plateau Mineral Processing Engineering and Comprehensive Utilization,Xining 810006,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Research Center of Nonferrous Mineral Resources of Engineering and Technology in Qinghai Province,Xining 810006,China;School of Materials Science and Engineering,Xi′an University of Architecture and Technology,Xi′an 710000,China)

机构地区：[1]西部矿业集团科技发展有限公司,青海西宁810006 [2]青海省高原矿物加工工程与综合利用重点实验室,青海西宁810006 [3]江西理工大学资源与环境工程学院,江西赣州341000 [4]青海省有色矿产资源工程技术中心,青海西宁810006 [5]西安建筑科技大学材料科学与工程学院,陕西西安710000

出　　处：《金属矿山》2023年第4期138-145,共8页Metal Mine

基　　金：青海省基础研究计划项目(编号:2021-0302-ZJC-0182);青海省科技计划项目(编号:2022-ZJ-Y09)。

摘　　要：对青海拉陵高里河下游某难选铜锌矿矿石进行了系统的工艺矿物学研究,查明了矿石的化学组成、矿物组成及其含量、主要矿物的嵌布特征、嵌布粒度以及解离情况。结果表明:矿石铜、锌品位分别为0.40%、1.60%,铜、锌氧化率分别为37.14%、62.12%,属低品位氧化铜锌矿;矿石中铜矿物主要以砷钙铜矿、黄铜矿形式存在,锌矿物主要以砷钙锌矿、铁闪锌矿、砷锌矿形式存在;砷钙铜矿中的锌以及砷钙锌矿和砷锌矿中的铜是以类质同象形式存在,这部分铜锌通过常规物理选矿难以分离,影响铜、锌的回收。黄铜矿、铁闪锌矿主要呈不规则状、星点状与Cu-Zn砷酸盐矿物、绿帘石、云母紧密共生;Cu-Zn砷酸盐矿物主要呈纤维状、板状、不规则状、浸染状与脉石矿物紧密共生,因此适当地提高磨矿细度有利于提高精矿质量与回收率。根据工艺矿物学研究结果,建议采用“铜锌硫化矿混合浮选—铜锌分离—分离尾矿再选铜锌氧化矿”的选矿工艺流程。In order to provide reliable theoretical support for the selection of beneficiation process of a refractory copper zinc ore in the lower reaches of Lalinggaoli River,Qinghai Province,systematic process mineralogy research was carried out on the ore,and the chemical composition,mineral composition and content,distribution characteristics,distribution size and dissociation of the main minerals were found out.The research results show that the ore belongs to low grade copper oxide zinc ore,the copper and zinc grades of the ore are 0.40%and 1.60%,and the copper and zinc oxidation rates are 37.14%and 62.12%,respectively.The copper minerals mainly exist in the form of conichalcite and chalcopyrite,while the zinc minerals mainly exist in the form of brickerite,marmatite and reinerite.The zinc in conichalcite and the copper in brickerite and reinerite exist in the form of isomorphism,which is difficult to separate through conventional physical beneficiation and affects the recovery of copper and zinc.Chalcopyrite and marmatite are mainly irregular and stellate,closely associated with Cu-Zn arsenate minerals,epidote and mica.Cu-Zn arsenate minerals are mainly fibrous,clintheriform,irregular,disseminated and closely associated with gangue minerals.Therefore,proper improvement of grinding fineness is beneficial to improve concentrate quality and recovery.According to the results of process mineralogy research,the beneficiation process of"mixed flotation of copper zinc sulfide ore-copper zinc separation-separation of tailings and then separation of copper zinc oxide ore"is suggested.

关 键 词：难选铜锌矿石 工艺矿物学 嵌布特征 砷酸盐矿物 

分 类 号：TD912[矿业工程—选矿]