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Review on coal-based reduction and magnetic separation for refractory iron-bearing resources

International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2087-2105页

作者： Qiang Zhang Yongsheng Sun Yuexin Han Yanjun Li Peng Gao School of resources and Civil Engineering Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China National-local Joint Engineering Research Center of High-efficient exploitation technology for refractory iron Ore resources Shenyang 110819China

The application of coal-based reduction in the efficient recovery of iron from refractory iron-bearing resources is comprehensively ***,the development and beneficiation of refractory iron-bearing resources have attracted increasing ***,the effect of iron recovery by traditional beneficiation methods is ***-based reduction followed by magnetic separation is proposed,which adopts coal as the reductant to reduce iron oxides to metallic iron below the melting *** metallic iron particles aggregate and grow,and the particle size continuously increases to be suitable for magnetic *** optimization and application of coal-based reduction have been abundantly researched.A detailed literature study on coal-based reduction is performed from the perspectives of thermodynamics,reduction kinetics,growth of metallic iron particles,additives,and *** coal-based reduction industrial equipment can be developed based on the existing pyrometallurgical equipments,rotary hearth furnace and rotary kiln,which are introduced ***,coal-based reduction currently mainly adopts coal as a reductant and fuel,which may result in high levels of carbon dioxide emissions,energy consumption,and *** innovation aiming at decreasing carbon dioxide emissions is a new trend of green and sustainable development of the steel ***,the substitution of coal with clean energy(hydrogen,biomass,etc.)for iron oxide reduction shows promise in the future.

关键词： refractory iron-bearing resources coal-based reduction iron recovery equipment carbon dioxide emissions

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