共查询到17条相似文献,搜索用时 828 毫秒
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采用矿物自动分析仪(MLA)、扫描电镜(SEM)、X射线衍射(XRD)研究了紫金山金铜矿入选矿石中有价元素铜、金、银的赋存状态以及分选过程中的金属走向。结果表明,铜矿物主要有蓝辉铜矿、铜蓝、硫砷铜矿,金银以游离矿物和硫化物包裹体为主。铜矿物常见沿明矾石溶蚀孔洞或碎裂缝隙充填,与黄铁矿密切连生,从原矿中分选铜矿物,理论品位为Cu 69.70%,理论回收率93.55%。中粒金嵌布于铜矿物和黄铁矿矿物粒间或裂隙,可随着铜和硫的回收进入铜、硫精矿,金的理论回收率分别为57.19%和27.27%;微细金粒包裹于明矾石和石英中,随脉石损失于尾矿中。银以显微银为主,多见呈微细粒包裹于硫化矿物中,铜精矿和硫精矿中银的理论回收率分别为56.96%和26.71%。 相似文献
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在对小铁山矿床矿石物质组成研究的基础上,着重论述了矿床中金的赋存状态有春工艺矿物学特征,探明了以银金矿主的金矿物大多呈裂隙金、粒间金产出于黄铜矿、黄铁矿等矿物裂隙或粒间、具有较好的解离性;统计分析了金矿物的粒度、成色、表面特性等及其金在矿体中的变化趋势,金在选矿产品的走向。指出了进一步提高金回收率的可能性。 相似文献
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湾阳河铜铅锌多金属矿床主金属品位高,伴生金、银、碲、铋造次我咎有益元素,综合利用程度较好主要金属粒度均以细、生细粒嵌布为主,彼此紧密连生,较为复杂。银主要以独立的角矿物存在,与方铅内铜矿、闪锌矿、锑黝铜矿、斑铜矿、钠铁矿、稀矿等关系十分密切,大多 呈包裹体赋丰于金属矿化物,碲化物中,少量产出于矿物粒间或裂隙中。银矿物以碲银矿、银锑黝铜矿为主,其次有含银自然金、银金矿、碲金银矿、自然银、螺状硫银矿、 相似文献
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以东昆仑某难处理金矿石为研究对象,用先进的矿物分析系统(MLA)与传统工艺矿物学研究方法相结合,查明该矿石的物质组成以及金的矿物种类、金的粒度特征及嵌布状态、主要载金矿物的嵌布粒度、金在矿石中的赋存状态等;在此基础上,采用MLA诊断分析各选冶流程中影响该金矿石选冶的工艺矿物学因素。结果表明,该矿石中具有高砷低硫,易泥化的特点;金矿物种类多,可浮性差别大;金矿物的嵌布粒度微细;载金矿物种类多,嵌布粒度细,属于极难选冶金矿石。针对这些特点,提出适合矿石性质的脱泥-细磨浮选-水冶的优化方案。 相似文献
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新疆某金矿历年来生产的氰化浸出尾矿,组成较为复杂,金、银、硫集中分布在-0.045 mm粒级中,通过对该金矿氰渣的实验室试验和扩大连续浮选试验研究,取得了金精矿品位19.50 g/t,回收率66.50%的工艺指标,有效地回收了该矿石中的微细粒金和包裹金。 相似文献
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基于矿物自动分析(MLA)技术,结合多种手段,对某硫化镍铜矿磨矿沉砂的进行了工艺矿物学研究。结果表明,沉砂主要由30%金属矿物和70%硅酸盐脉石矿物组成,其中目的元素镍、铜、钴、金、银、铂、钯含量分别为0.82%、1.10%、0.04%、0.75 g/t、10.50 g/t、0.23 g/t、0.13 g/t。独立的金矿物主要为合金相,独立的铂钯矿物包括合金相、砷化物和铋碲化物。金及铂钯矿物虽粒度细小,但部分已单体解离,且载体矿物大多为金属硫化物;银多以碲银矿形式赋存,碲银矿粒度细小,且银矿物大多呈包裹体分布于金属硫化物中。 相似文献
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Gold leaching was influenced in association with silver and polymetal sulphide minerals. A packed bed was adopted to single out the galvanic and passivation effects with four sets of minerals: pyrite–silica, chalcopyrite–silica, sphalerite–silica and stibnite–silica. Pyrargyrite enhanced Au recovery to 77.3% and 51.2% under galvanic and passivation effects from pyrite (vs 74.6% and 15.8%). Pyrargyrite in association with sphalerite also enhanced Au recovery to 6.6% and 51.9% (vs 1.6% and 15.6%) under galvanic and passivation effects from sphalerite. Pyrargyrite associated with chalcopyrite retarded gold recovery to 38.0% and 12.1% (vs 57% and 14.1%) under galvanic and passivation effects. Accumulative silver minerals enhanced Au recovery to 90.6% and 81.1% (vs 74.6% and 15.8%) under galvanic and passivation impacts from pyrite. Silver minerals with sphalerite under galvanic and passivation effects enhanced Au recovery to 71.1% and 80.5% (vs 1.6% and 15.6%). Silver minerals associated with chalcopyrite retarded Au recovery to 10.2% and 4.5% under galvanic and passivation impacts (vs 57% and 14.1%). Stibnite retarded Au dissolution with pyrargyrite and accumulative silver minerals. Pyrargyrite and accumulative silver enhanced gold dissolution for free gold and gold associated with pyrite and sphalerite. Gold dissolution was retarded for gold and silver minerals associated with chalcopyrite and stibnite. 相似文献
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为实现铅银渣中金银的综合回收,对铅银渣物理化学性质、有价金属含量、赋存状态、铅银渣中金银的回收方法、研究进展及其应用情况进行综述。铅银渣粒度细、酸度强、可溶物含量高,渣中矿物经历过相体转化由硫化物转变成氧化物,以再造矿物形式存在,选矿难度大;铅银渣有价金属铜、铅、锌、金、银含量较高,经济价值可观。目前,从铅银渣中回收金银的主要方法为浮选法、湿法、火法、湿法-火法联合、选冶联合等。通过分析各种方法优缺点,指出单一的浮选法流程简单、成本低,但金银回收率低;湿法、火法或湿法-火法工业应用良好,但是存在工艺复杂、成本高;选冶联合方法金属回收率高、流程适应性强,便于连续操作,具有较好的发展应用前景。 相似文献
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In their eutectic compositions, Au–Si alloys have a melting point of 369°C, and a colour similar to that of high-grade gold. Results of the manufacture of gold alloys with 2.5%, 2.8% and 3.0% silicon, by means of melting in a plasma furnace with an inert argon atmosphere, are presented in this study. Chemical composition characterisation was carried out by energy dispersion spectroscopy and wave dispersion spectrometry, and metallographic and microstructural analysis by optical microscopy, SEM and DRX, Vickers hardness and mircohardness testing, melting point evaluation by DSC and determination of the SCIELab colorimetric coordinates. The results of the hardness and micro-hardness testing gave values around 110HV, presenting an important increase in the mechanical properties with respect to the traditional high purity gold alloys. The melting temperature for the alloys was around 374°C as well as being a heat very close to the values of pure gold. 相似文献