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首页> 外文学位 >Mineralogical characteristics which affect mineral processing of Faro and Vangorda ores, Yukon, Canada.
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Mineralogical characteristics which affect mineral processing of Faro and Vangorda ores, Yukon, Canada.

机译：矿物学特征影响加拿大育空地区法鲁和凡戈达矿石的选矿。

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摘要

A study of the Faro and Vangorda Zn-Pb-Ag ores and concentrator products was made by image analysis to evaluate the influence their mineralogical characteristics have on grade and recovery of lead, zinc, silver and gold. Drill-core and concentrator samples were characterized by mineral identification and modal analysis, and by determining ore mineral grain size distributions, precious metal content of the ore minerals, and ore mineral liberations and associations. The detailed behaviour in the concentrator of sphalerite and galena from each deposit was calculated by materials balance.;A technique for measuring ore mineral associations by the proportion of perimeter adjacent to other minerals was developed and tested. The technique allows the determination of mineral associations, preferred mineral associations, preferred mineral associations by grain size, preferred breakage and relative bond strengths between minerals. Sphalerite and galena are preferentially associated with pyrite in pyritic ores, with quartz in quartzose ores, and with barite in baritic ores. In quartzose ores a significant proportion of sphalerite and galena is disseminated as fine grains in the quartz matrix. In pyritic and baritic ores coarse-grained sphalerite and galena have a higher association with each other than their fine-grained counterparts. In those same ores fine-grained galena is more closely associated with pyrite than coarse-grained galena. In baritic Vangorda ore, an association of fine-grained sphalerite and galena with siderite is detected. These textures have implications for mineral beneficiation. There is strong evidence that preferred breakage takes place during grinding. Coarse-grained pyrite and barite break preferentially from sphalerite and galena, whereas sphalerite and galena have a slight tendency not to detach from each other. Medium-grained siderite detaches poorly from sphalerite and galena. It is interpreted that preferential breakage is due to differences in bond strength between sphalerite, galena and the other major minerals. A sequence for increasing bond strength between sphalerite and the other minerals is: Barite ;The major factors which reduce concentrate grades and metal recoveries due are presence of trace amounts of secondary minerals (covellite, digenite, chalcocite, bornite, goethite, secondary galena), as well as marcasite and pyrrhotite, the presence of a large amount of fine-grained galena, the associations of sphalerite and galena with siderite and each other and the mineralogical distribution of much of the silver in acanthite and the gold in gold-silver-alloy.
机译：通过图像分析对Faro和Vangorda Zn-Pb-Ag矿石和选矿产品进行了研究，以评估其矿物学特征对铅，锌，银和金的品位和回收率的影响。钻芯和选矿厂样品的特征在于矿物鉴定和模态分析，以及确定矿石矿物粒度分布，矿石矿物中的贵金属含量以及矿石矿物的游离和缔合。通过物料平​​衡计算了每个矿床中闪锌矿和方铅矿选矿厂的详细行为。；开发并测试了一种通过与其他矿物相邻的周长比例来测量矿石矿物缔合的技术。该技术可以确定矿物缔合，优选的矿物缔合，通过粒度的优选的矿物缔合，优选的断裂和矿物之间的相对结合强度。闪锌矿和方铅矿优先与黄铁矿中的黄铁矿，石英糖矿中的石英和重晶石中的重晶石相关。在石英矿石中，很大一部分的闪锌矿和方铅矿以细小颗粒的形式散布在石英基质中。在黄铁矿和重晶石矿中，粗粒闪锌矿和方铅矿彼此之间的关联性高于细粒闪锌矿和方铅矿。在那些相同的矿石中，与粗粒方铅矿相比，细粒方铅矿与黄铁矿的联系更为紧密。在重晶Vangorda矿石中，检测到细粒闪锌矿和方铅矿与菱铁矿的关联。这些质地对矿物的选矿有影响。有充分的证据表明，在研磨过程中会发生优选的断裂。粗粒状的黄铁矿和重晶石优先从闪锌矿和方铅矿中破碎，而闪锌矿和方铅矿则有轻微的不分离的趋势。中粒菱铁矿与闪锌矿和方铅矿的剥离差。据解释，优先破坏是由于闪锌矿，方铅矿和其他主要矿物之间的结合强度不同。闪锌矿与其他矿物之间的结合强度增加的顺序是：重晶石；降低精矿品位和金属回收率的主要因素是存在微量的次要矿物（铜镍矿，方铁矿，方铅矿，针铁矿，针铁矿，方铅矿），以及菱铁矿和黄铁矿，大量细粉方铅矿，闪锌矿和方铅矿与菱铁矿的相互结合以及铅锌矿中许多银的矿物学分布以及金银合金中的金的矿物学分布。

著录项

  • 作者

    Wilson, John Murray Duff.;

  • 作者单位

    Carleton University (Canada).;

  • 授予单位 Carleton University (Canada).;
  • 学科 Mineralogy.
  • 学位 Ph.D.
  • 年度 1995
  • 页码 276 p.
  • 总页数 276
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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