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金属矿山 ›› 2015, Vol. 44 ›› Issue (08): 91-95.

• 矿物工程 • 上一篇    下一篇

河南某鲕状赤铁矿石工艺矿物学研究

乔江晖1,杜晓冉2,宋翔宇2,朱春华3,4   

  1. 1.中国国土资源经济研究院,北京 101149;2.河南省岩石矿物测试中心,河南 郑州 450012;3.中国地质大学(北京)地球科学与资源学院,北京 100083;4.中国地质调查局,北京100037
  • 出版日期:2015-08-15 发布日期:2015-11-19

Process Mineralogy Research on a High Phosphorus Oolitic Hematite in Henan

Qiao Jianghui1,Du Xiaoran2,Song Xiangyu2,Zhu Chunhua3,4   

  1. 1.Chinese Academy of Land and Resource Economic,Beijing 101149,China;2.Henan Provincial Testing Center for Rocks and Minerals,Zhengzhou 450012,China;3.School of Earth Science and Resources,China University of Geosciences,Beijing 100083,China;4.China Geological Survey,Beijing 100037,China
  • Online:2015-08-15 Published:2015-11-19

摘要: 河南某鲕状赤铁矿石铁品位为52.50%,铁主要以赤铁矿形式存在,分布率为75.37%。矿石中主要矿物为赤铁矿、伊利石及菱磷铝锶矾。为给矿石合理开发利用提供参考,对其进行了工艺矿物学研究。结果表明:赤铁矿常呈椭圆形鲕粒,细粒或隐晶状赤铁矿集合体与脉石矿物呈椭圆状的包复颗粒由核心和同心状外壳聚集而成,鲕粒中各成分相互混杂,局部赤铁矿聚集;部分赤铁矿呈他形粒状单体或集合体不均匀分布;偶见赤铁矿呈隐晶状胶结物分布于砂屑粒间;赤铁矿嵌布粒度微细,0.037~0.003 mm粒级占87.17%。采用传统选矿方法处理该矿石难以取得理想的指标。推荐采用深度(直接)还原工艺将微细粒弱磁性铁矿物转变为可通过弱磁选分离的磁铁矿或金属铁,再通过磁选分离。

关键词: 鲕状赤铁矿, 结构构造, 胶结物, 菱磷铝锶矾

Abstract: There is 52.50% iron in an oolitic hematite from Henan,iron mainly exists in the form of hematite,with distribution rate of 75.37%.Main minerals are hematite,illite and svanbergite.In order to provide reference for the rational development and utilization of the ore,process mineralogy was conducted.Results indicated that hematite usually exists in form of oval ooid,fine or aphanitic aggregate coated with gangue minerals like oval shape,coupled by the core and a concentric shell,some of which assembled with each other;part of the hematite show xenomorphic granular uneven distribution of monomers or aggregates,few of hematite distributed between sand grains in form of cryptocrystalline cements;hematite was micro-fine distributed,0.037~0.003 mm accounted for 87.17%.It is difficult to obtain the ideal index by the conventional mineral processing methods.Deep(direct) reduction process is recommended for which can transform the low intensity magnetic iron minerals into high intensity magnetite or metallic iron and be separated by low intensity magnetic separation.

Key words: Oolitic hematite ore, Structure, Cements, Svanbergite