Removal of phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super-gravity field

Jin-tao Gao, Lei Guo, Yi-wei Zhong, Hong-ru Ren, Zhan-cheng Guo

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    Jin-tao Gao, Lei Guo, Yi-wei Zhong, Hong-ru Ren, and Zhan-cheng Guo, Removal of phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super-gravity field, Int. J. Miner. Metall. Mater., 23(2016), No. 7, pp.743-750. https://dx.doi.org/10.1007/s12613-016-1288-y
    Jin-tao Gao, Lei Guo, Yi-wei Zhong, Hong-ru Ren, and Zhan-cheng Guo, Removal of phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super-gravity field, Int. J. Miner. Metall. Mater., 23(2016), No. 7, pp.743-750. https://dx.doi.org/10.1007/s12613-016-1288-y
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    Removal of phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super-gravity field

    • State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    基金项目: 

    This work was financially supported by the National Natural Science Foundations of China (Nos. 51404025 and 51234001) and the Fundamental Research Funds for the Central Universities of China (FRF-TP-15-009A2).

      通信作者:

      Zhan-cheng Guo E-mail: zcguo@ustb.edu.cn

    中文摘要

    A new approach of removing the phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super- gravity field was investigated. The iron-slag separation by super-gravity resulted in phosphorus being effectively removed from the iron-rich phase and concentrated as a phosphorus-rich phase at a temperature below the melting point of iron. The samples obtained by super-gravity exhibited obvious layered structures. All the iron grains concentrated at the bottom of the sample along the super-gravity direction, whereas the molten slag concentrated in the upper part of the sample along the opposite direction. Meanwhile, fine apatite crystals collided and grew into larger crystals and concentrated at the slag–iron interface. Consequently, in the case of centrifugation with a gravity coefficient of G = 900, the mass fractions of the slag phase and iron-rich phase were similar to their respective theoretical values. The mass fraction of MFe in the iron-rich phase was as high as 97.77wt% and that of P was decreased to 0.092wt%.

     

    Removal of phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super-gravity field

    Author Affilications

      • State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    • Funds: 

      This work was financially supported by the National Natural Science Foundations of China (Nos. 51404025 and 51234001) and the Fundamental Research Funds for the Central Universities of China (FRF-TP-15-009A2).

    • Received: 24 December 2015; Revised: 03 March 2016; Accepted: 06 March 2016;
    A new approach of removing the phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super- gravity field was investigated. The iron-slag separation by super-gravity resulted in phosphorus being effectively removed from the iron-rich phase and concentrated as a phosphorus-rich phase at a temperature below the melting point of iron. The samples obtained by super-gravity exhibited obvious layered structures. All the iron grains concentrated at the bottom of the sample along the super-gravity direction, whereas the molten slag concentrated in the upper part of the sample along the opposite direction. Meanwhile, fine apatite crystals collided and grew into larger crystals and concentrated at the slag–iron interface. Consequently, in the case of centrifugation with a gravity coefficient of G = 900, the mass fractions of the slag phase and iron-rich phase were similar to their respective theoretical values. The mass fraction of MFe in the iron-rich phase was as high as 97.77wt% and that of P was decreased to 0.092wt%.

     

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