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首页> 外文会议>Iron ore 2011 >Dephosphorisation of Limonitic Concentrate by Roasting, Acid Leaching and Magnetic Separation
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Dephosphorisation of Limonitic Concentrate by Roasting, Acid Leaching and Magnetic Separation

机译：焙烧，酸浸和磁选法对褐铁精矿进行脱磷

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摘要

The oolitic iron ore reserves in Lisakovsky, North Kazakhstan represent quite a challengingrndeposit both from a technological and from a resource point of view. The diffi culties in processingrnsuch types of ore are connected with the extremely fi ne dissemination of phosphorus and ganguernminerals inside the oolitic formations. The goethite crystals are cemented in their structure byrnaluminosilicates with quartz and other gangue minerals and dissemination is so fi ne that they arernnot separable by physical methods. The laboratory tests performed for dephosphorisation showrnthat the combination of alkaline roasting followed by low intensity magnetic separation and acidrnleaching enables the obtaining of high grade iron concentrate. The magnetic separation performedrnahead of leaching is effi cient as a means of buffering the high pH by washing out the soluble saltsrnand the excess of base and after leaching facilitates the removal of secondary liberated ganguernminerals in the non-magnetic fraction. As a consequence, phosphorous content is dropped torna more acceptable level for the ferrous metallurgy and iron grade and recovery reach 61.6 andrn80.8 per cent respectively.
机译：从技术和资源的角度来看，哈萨克斯坦北部利萨科夫斯基的鲕状铁矿储量都具有很大的挑战性。这类矿石的加工困难与在橄榄岩地层中磷和矿物质的极细微分布有关。针铁矿晶体的结构是由铝硅酸盐与石英和其他脉石矿物胶结而成的，其扩散是如此之细，以致于无法通过物理方法分离。对脱磷进行的实验室测试表明，碱性焙烧然后进行低强度磁选和酸浸相结合，可以得到高品位的铁精矿。通过淋洗的磁选方法可有效地通过洗净可溶性盐和过量的碱来缓冲高pH值，并且在淋洗后有助于去除非磁性级分中的次级游离矿物质。结果，磷含量下降到铁冶金和铁品位更可接受的水平，回收率分别达到61.6％和80.8％。

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  • 来源
    《Iron ore 2011》|2011年|p.445-452|共8页
  • 会议地点 Perth(AU)
  • 作者

    K Ionkov; S Gaydardzhiev; A Correa de Araujo; H Kokal; A Pirson; D Bastin;

  • 作者单位

    GeMME, University of Liege, B52, Sart Tilman, Liege 4000, Belgium. Email: kionkov@ulg.ac.be;

    GeMME, University of Liege, B 52, Sart Tilman, Liege 4000, Belgium. Email: s.gaydardzhiev@ulg.ac.be;

    Research and Development, Voie Romaine, BP 30320, F-57283 Maizières-lès-Metz Cedex, France. Email: armando.correa@arcelormittal.com;

    Global RD – East Chicago, ArcelorMittal USA, 3001 East Columbus Drive, East Chicago, IN 46312-2939, USA. Email: arold.kokal@arcelormittal.com;

    ArcelorMittal Global Research and Development, Maizières Mining and Mineral Processing, Voie Romaine, BP 30320, F-57283 Maizières-lès-Metz Cedex France.Email: arnaud.pirson@arcelormittal.com;

    Mineral Processing and Recycling – GeMME, University of Liege, B 52, Sart Tilman, Liege 4000, Belgium. Email: david.bastin@ulg.ac.be;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 铁矿石;
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