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有色金属(选矿部分):2024,(4):33-39
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贵州某卡林型金矿工艺矿物学研究
(1.贵州大学 矿业学院;2.贵州省地质矿产中心试验室)
中图分类号:TD912 ????? 文献标识码:A
Zhu Zhi-xiong1, Nie Guanghua2, Deng Qiang3, Yang Yong1, TANG Yun1
(1.Guizhou University;2.GuiZhou University;3.Geological and Mineral Plant Central Laboratory of Guizhou Province)
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投稿时间:2023-03-23    修订日期:2023-04-03
中文摘要: 运用工艺矿物学参数自动分析系统(BPMA)、X 射线衍射(XRD)、X 射线荧光光谱仪(XRF)等多种测试手段,对矿石的化学成分、矿物组成、金的赋存状态及载金矿物与脉石矿物的嵌布特征、元素赋存状态进行了详细研究。研究表明: 1、卡林型金矿中Au含量为 4.75 g/t,是最主要的有价元素,59.36% 的金以包裹金的形式存在,其中硫化矿中包裹金最高,为42.95%。次以碳质含金的形式存在,微量以裸露金的形式存在。包裹金含量较多,即使在细磨条件下也很难实现单体解离或裸露,不利于提高金矿的回收率。主要的载金硫化矿物为黄铁矿和毒砂。脉石矿物主要有白云石、石英、方解石、粘土矿物等;2、黄铁矿主要集中在0.015~0.02mm粒级,毒砂主要集中在0~0.005mm粒级,白云石主要集中在0.104~0.147mm粒级,方解石主要集中在0.104~0.147mm粒级,石英主要集中在0.104~0.147mm粒级,5种矿物当中,毒砂的细颗粒最多,黄铁矿其次,方解石、白云石和石英的粗颗粒较多。随着物料粒度的降低,矿石中黄铁矿品位会随着升高;3、黄铁矿作为最主要的载金矿物,颗粒较细,且主要嵌布在绢云母、石英、白云石等矿物中,也有部分单体存在。为了使黄铁矿能够充分单体解离,建议在磨矿阶段提高磨矿时长或是采用多段磨矿的工艺流程。
中文关键词: 卡林型金矿  工艺矿物学  低品位
Abstract:The chemical composition, mineral composition, occurrence of gold, distribution characteristics of gold-bearing minerals and gangue minerals, and occurrence of elements of the ore were studied in detail by means of automatic process mineralogical parameter analysis system (BPMA), X-ray diffraction (XRD), X-ray fluorescence spectrometer (XRF) and other testing methods. The results show that: 1. The content of Au in Carlin-type gold deposits is 4.75 g/t, which is the most important valuable element, 59.36% of the gold exists in the form of coated gold, and the highest coated gold is 42.95% in sulfide ore. Secondary exists in the form of carbonaceous gold, and trace exists in the form of bare gold. Due to the high content of coated gold, it is difficult to achieve monomer dissociation or exposure even under fine grinding conditions, which is not conducive to improving the recovery of gold ore. The main gold-bearing sulfide minerals are pyrite and arsenopyrite. Gangue minerals are mainly dolomite, quartz, calcite, clay minerals, etc. 2, pyrite mainly concentrated in 0.015~0.02mm size, arsenopyrite mainly concentrated in 0~0.005mm size, dolomite mainly concentrated in 0.104~0.147mm size, calcite mainly concentrated in 0.104~0.147mm size, quartz mainly concentrated in 0.104~0.147mm size, quartz mainly concentrated in 0.104~0.147mm size. Among the five minerals, arsenopyrite has the largest fine particles, followed by pyrite, and calcite, dolomite and quartz have more coarse particles. With the decrease of material size, the grade of pyrite in ore will increase. 3. As the main gold-bearing substance, pyrite has fine particles and is mainly embedded in sericite, quartz, dolomite and other minerals, and some monomers also exist. In order to fully dissociate pyrite monomer, it is suggested to increase grinding time in grinding stage or adopt multi-stage grinding process.
文章编号:     中图分类号:    文献标志码:
基金项目:贵州省科学技术基金资助项目;
引用文本:
朱志雄,聂光华,邓强,杨勇,唐云.贵州某卡林型金矿工艺矿物学研究[J].有色金属(选矿部分),2024(4):33-39.
Zhu Zhi-xiong,Nie Guanghua,Deng Qiang,Yang Yong,TANG Yun.中图分类号:TD912 ????? 文献标识码:A[J].Nonferrous Metals(Mineral Processing Section),2024(4):33-39.

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