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Metal Mine ›› 2019, Vol. 48 ›› Issue (02): 2-9.

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Recent Progress in Magnetic Reduction Roasting of Refractory Iron Ore via Fluidized Bed

Li Yanjun1,2, Yu Jianwen1,2, Han Yuexin1,2, Gao Peng1,2   

  1. 1. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819, China;2. National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology,Shenyang 110819,China
  • Online:2019-02-25 Published:2019-04-08

Abstract: There is a large amount of refractory iron ore resources that cannot be exploited by conventional ore dressing methods in China. Fluidized magnetization roasting is the most effective method for treating this iron ore,and has become a research hotspot in recent years. In the present review,the magnetization roasting mechanismof iron ore is introduced, and the development history and technical status of fluidized magnetization roasting are summarized, with the emphasis on introducing the technical equipment features and application demonstration of various fluidized magnetization roastingtechnologies, including boiling furnace, flash magnetization roaster, fluidized bed, and suspended magnetization roaster. The application prospect of thefluidized magnetization roasting technology is also analyzed for low-grade refractory siderite, limonite, hematite, and iron-containing tailings.

Key words: Refractory iron ore, Fluidization, Magnetization roasting, Technical equipment, Development prospect