基于某铜尾矿矿物学特征回收其中明矾石的前景分析  

Prospect Analysis of Recovering Alumina from a Copper TailingsBased on Its Mineralogical Characteristics

作　　者：邓莉莉[1] DENG Lili(Zijin Mining Group Co.,Ltd.,Shanghang 364200,China)

机构地区：[1]紫金矿业集团股份有限公司,福建上杭364200

出　　处：《有色金属工程》2023年第12期109-120,共12页Nonferrous Metals Engineering

摘　　要：为实现从铜尾矿中综合回收明矾石,并降低明矾石尾矿中硫酐含量,不影响微粉制备,以福建某铜尾矿为研究对象,利用化学分析、矿物自动分析仪(BPMA)等手段对铜尾矿样品进行了工艺矿物学研究,重点查明了铜尾矿中石英、明矾石、地开石、绢云母和硫酐的主要物相组成、嵌布特征及粒级分布。结果表明,铜尾矿中SO_(3)占比5.04%,TS含量占比1.91%,明矾石常见与石英、地开石、绢云母呈浸染状互为连生,部分可见包含细粒黄铁矿连生。硫酐主要赋存于明矾石中,部分硫酐分散于地开石、石英和绢云母中,从铜尾矿样品中回收明矾石,精矿中硫酐的理论品位为38.22%,理论回收率为94%左右。在工艺矿物学研究基础上,提出采用“脱泥-脱硫-明矾石浮选”流程,流程结构为“一粗一扫二精”的浮选流程,得到了SO_(3)品位20.14%、SO_(3)回收率53.36%的明矾石精矿,且尾矿中硫酐含量满足制备微粉要求。In order to realize the comprehensive recovery of alunite from copper tailings and reduce the content of sulfuric anhydride in alunite tailings so that it does not affect the preparation of micropowder,this paper takes a copper tailings in Fujian as the research object,and carries out a process mineralogical study on copper tailings samples by means of chemical analysis,mineral auto analyzer(BPMA),etc.,and focuses on the identification of the main phase composition,embedding characteristics and particle size distribution of quartz,alunite,geode,sericite and sulfuric anhydride in the tailings.The results show that SO_(3)in copper tailings accounts for 5.04%,TS content accounts for 1.91%,alunite is commonly associated with quartz,diorite and sericite in the form of leaching,and some of them can be seen to contain fine-grained pyrite and its association.Sulfuric anhydride is mainly in alunite,and part of sulfuric anhydride is dispersed in diorite,quartz and sericite.Recovering alunite from copper tailings samples,the theoretical grade of sulfuric anhydride in the concentrate is 38.22%,and the theoretical recovery rate is about 94%.On the basis of process mineralogical research,we propose to adopt the process of"desliming-desulfurization-alumina flotation",the process structure is"one coarse,one sweep,two fine"flotation flow,and get the alumina with SO_(3)grade of 20.14%and SO_(3)recovery of 53.36%.Concentrate,and the content of sulfur anhydride in the tailings meets the requirements for the preparation of micropowder.

关 键 词：铜尾矿 明矾石 硫酐 工艺矿物学 选矿工艺 

分 类 号：TD912[矿业工程—选矿]