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Metal Mine ›› 2024, Vol. 53 ›› Issue (3): 94-.

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Research on Magnetic Separation Process of Fine-grained Lean Magnetite Ore in Anshan Region

LI Wanxing1,2 WU Junjie1 NING Chenyu2 XU Donglin3 ZHENG Jimin4 GUO Xiaofei1   

  1. 1. School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China; 2. Anshan Iron and Steel Group Mining Design and Research Institute,Anshan 114002,China;3. Anqian Mining Co. ,Ltd. , Anshan Iron and Steel Group,Anshan 114043,China;4. Weihai Haiwang Cyclone Co. ,Ltd,Weihai 264204,China
  • Online:2023-03-15 Published:2024-04-24

Abstract: The iron grade of iron ore in Xudonggou and Yabaleng mining areas in Anshan region is 29. 50%. The main iron minerals is magnetite,and the main gangue mineral is quartz. In order to develop and utilize the ore efficiently,based on the ore properties analysis obtained by X-ray fluorescence analysis,chemical composition analysis,iron phase detection and scanning electron microscope,the selection conditions of wet coarse medium magnetic preconcentration,stage grinding stage weak magnetic separation,elutriation machine cleaning and extended continuous separation test were carried out. The results showed that:① the iron grade and recovery rate of magnetic pre-selected coarse concentrate in the drum magnetic separator of -2. 5 mm high pressure roller grinding products are 40. 20% and 89. 76%;② After two stages of grinding (the fineness of the first and second stages of grinding is -0. 074 mm accounting for 75% and -0. 045 mm accounting for 90%,respectively),three stages of low intensity magnetic separation,and one stage of washing machine selection,the iron concentrate with final yield of 35. 73%,iron grade of 67. 08%,iron recovery of 81. 24% was obtained,and iron grade of tailings is only 8. 61%. The research results can be used as the basis for development and utilization of the ore.