谦比希铜矿中铜矿物的解离特性及其可浮性研究

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英文篇名：Study on Mineral Liberation Characteristics of a Copper Ore from Chambishi and Its Floatability 作者：苏敏 ; 窦培谦 ; 张瑞洋 ; 孙春宝 ; 寇珏 ; 刘子源 英文作者：Su Min;Dou Peiqian;Zhang Ruiyang;Sun Chunbao;Kou Jue;Liu Ziyuan;Non-ferrous Corporation Africa Mining Public Limited Company;Department of Safety Engineering,China University of Labor Relations;School of Civil and Resource Engineering,University of Science and Technology Beijing; 关键词：硫化铜矿 ; MLA ; 嵌布粒度 ; 矿物解离特性 ; 可浮性 英文关键词：Copper sulfide ore;;MLA;;Dissemination particle sizes;;Mineral liberation degree;;Floatability 中文刊名：JSKS 英文刊名：Metal Mine 机构：中国有色矿业集团非洲矿业有限公司;中国劳动关系学院安全工程系;北京科技大学土木与资源工程学院; 出版日期：2019-04-15 出版单位：金属矿山 年：2019 期：No.514 语种：中文; 页：JSKS201904022 页数：6 CN：04 ISSN：34-1055/TD 分类号：111-116

摘要

矿物的单体解离是浮选分离的前提,查明矿石细度、目的矿物单体解离度和矿石可浮性三者之间的内在联系,可为浮选前物料的准备提供指导。为此,以赞比亚谦比希西矿体矿石为例,借助矿物解离分析系统(MLA),初步探讨了不同细度下有用矿物的解离特性与可浮性的关系。研究结果表明:谦比希铜矿中的主要铜矿物为黄铜矿,含量为5.32%,脉石矿物主要有正长石、石英和云母;原矿中黄铜矿属于以微细粒为主的不等粒嵌布,黄铜矿颗粒介于10～500μm,且多数与长石和石英毗邻,部分细颗粒被包裹在粗颗粒的长石和云母中,仅有少量单体解离颗粒存在;将原矿磨至-74μm占70%,黄铜矿的自由表面由60.88%升高至78.14%,单体解离颗粒含量由28.90%增加至54.24%,但连生体中铜矿物的分布规律没有改变;试验矿石浮选过程最有效的选别粒度为18～100μm,粗颗粒中铜的损失是由于铜矿物单体解离度低,过细物料的损失则是因为物料可选性差。
        The desired mineral liberation is the prerequisite for flotation. Finding out the inner relations among the ore fineness,the desired mineral liberation degree and its floatability,can provide guidance for the ore pretreatment before flotation. Thus taken copper ores of west ore body in Chambishi as a case,briefly discusses the relation between the mineral liberation degree and its floatability under different dissemination particle sizes,using mineral liberation analysis(MLA). The results show that the main copper mineral is chalcopyrite(5.32%),and the main gangue minerals are orthoclase,quartz and mica in Chambishi copper ore. In the ore,the copper mineral dissemination particle size is fine and uneven(10～500 μm),and most of which are contiguous to quartz and feldspars,other fine particles are wrapped in coarse gangues,and there are a small number of sufficiently liberated chalcopyrite. When the ore is ground to 70% passing 74μm,the free surface percentage of chalcopyrite raises from 60.88% to 78.14%,and the number of sufficiently liberated chalcopyrite significantly increases from 28.90% to 54.24%,while the distribution of chalcopyrite in coexistence does not change. In the flotation process,the optimum particle size is 18～100 μm,and the copper loss in the coarse particles is due to low liberation degree of copper minerals,but the loss in the fine particles is due to poor floatability.

引文

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