高硫高砷难浸金精矿工艺矿物学研究.doc.doc

高硫高砷难浸金精矿工艺矿物学研究高国龙 1,2 ,李登新 2 (1 .清华大学环境科学与工程系,北京 100084 ;2 .东华大学环境科学与工程学院,上海 201620) 摘要: 为了给高硫高砷难浸金精矿提金工艺选择提供理论依据,分别从化学成分分析、 X 射线衍射分析、矿物解离度分析、扫描电镜- 能谱分析等不同程度开展了工艺矿物学研究。发现: ①金精矿中金含量 47. 5g·t -1、 Ag8. 46g ·t -1、S 13. 91%( 质量分数)、 As7. 54 %( 质量分数), 是典型的高硫高砷难浸复杂金矿;②金精矿中的主要金属矿物为毒砂、黄铁矿, 脉石矿物主要有石英、白云母, 多种矿物互相包裹。金精矿中有害组分主要为砷, 含砷矿物以毒砂形式出现。金以不可见金的形式赋存于载金矿物中。这些发现, 对高硫高砷难浸金精矿的提金工艺具有指导意义。关键词: 高硫高砷;金精矿;工艺矿物学;赋存状态;物相 Process mineralogy of high - sulphur and high - arsenic refractory gold concentrate GAO Guo - long 1,2, LI Deng - xin 2 (1. Department of Environmental Science and Engineering , Tsinghua University , Beijing 100084 , China ;2. College of Environmental Science and Engineering , Donghua University , Shanghai 201620 , China) Abstract : In order to provide a theoretical basis for gold extraction process of high - sulfur and high - arsenic refractory gold concentrate , process mineralogy was studied from position analysis , XRD , MLA , and SEM - EDS . It was found that(1)the gold concentrate gold isa typical high - sulfur and high - arsenic refractory gold concentrate , containing gold 47. 5g·t -1, Ag8. 46g ·t -1,S 13. 91 % (mass fraction)and As7. 54% (mass fraction) ; (2)Main metal minerals are arsenopyrite and pyrite . Gangue minerals are mainly quartz , muscovite . ponent in gold concentrate mainly is arsenic and arsenic mineral is in the arsenopyrite form . Gold occurs in the inv