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Research Progress of Impurity Removal from Metallurgical Slag and Strengthening Metallurgical Process by External Electric Field

Received: 15 February 2021     Published: 16 April 2021
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Abstract

Based on the demand of the development of circular economy, the utilization of metallurgical solid waste has attracted more and more attention, one of the main ways of comprehensive utilization of metallurgical slag is internal recycling in steel plant to replace limestone as smelting flux, so it need to removal of phosphorus and sulfur from molten slag to decrease the burden of dephosphorization and desulfurization in the steelmaking process. In this paper, the current recycling situation of phosphorus-containing steel slag and sulfur-containing waste refining slag is briefly summarized, these relevant researches show that, the methods of dephosphorization of steel slag include reduction method (such as carbon reduction method or silicon reduction method) and gasification method, the dephosphorization ratio with reduction method reached 95.5%, and the greatest dephosphorization rate with gasification method can reach 81.23%, these treatment methods need a long time and treatment temperature is too high. Two main methods to remove sulfur from refining slag, oxidation method and hydrothermal method, oxidative roasting desulfurization and the sulfur removal rate was about 95%. And the latest research progress of using electric field to strengthen slag-metal reaction and component migration in metallurgical melt is also summarized. Electric field treatment of metallurgical melts can affect the physicochemical properties, such as viscosity, solidification structure, grain refinement, material properties, partition coefficient of component and the activity of solute, etc. It can enhances mass transfer reaction in metallurgical process and make oxygen transfer between molten iron and molten copper increase 2~3 times. It also can enhanced the migration ability of components between molten slag and metal, it is a great significance for electric field strengthening slag desulfurization because of enough sulfur ions in slag. There is a non-equilibrium phosphorus capacity different from conventional thermodynamic properties under the action of electric field, the lower non-equilibrium phosphorus capacity improves the phosphorus removal efficiency of phosphorus-containing steel slag.

Published in Journal of Energy and Natural Resources (Volume 10, Issue 2)
DOI 10.11648/j.jenr.20211002.11
Page(s) 39-45
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Metallurgical Melt, Component Migration, Slag-Metal Reaction, Electric Field

References
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Cite This Article
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    Wang Haichuan, Liao Zhiyou, Wang Bowen, Wu Ting, Lv Ningning, et al. (2021). Research Progress of Impurity Removal from Metallurgical Slag and Strengthening Metallurgical Process by External Electric Field. Journal of Energy and Natural Resources, 10(2), 39-45. https://doi.org/10.11648/j.jenr.20211002.11

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    ACS Style

    Wang Haichuan; Liao Zhiyou; Wang Bowen; Wu Ting; Lv Ningning, et al. Research Progress of Impurity Removal from Metallurgical Slag and Strengthening Metallurgical Process by External Electric Field. J. Energy Nat. Resour. 2021, 10(2), 39-45. doi: 10.11648/j.jenr.20211002.11

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    AMA Style

    Wang Haichuan, Liao Zhiyou, Wang Bowen, Wu Ting, Lv Ningning, et al. Research Progress of Impurity Removal from Metallurgical Slag and Strengthening Metallurgical Process by External Electric Field. J Energy Nat Resour. 2021;10(2):39-45. doi: 10.11648/j.jenr.20211002.11

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  • @article{10.11648/j.jenr.20211002.11,
      author = {Wang Haichuan and Liao Zhiyou and Wang Bowen and Wu Ting and Lv Ningning and Deng Aijun and Wu Liushun},
      title = {Research Progress of Impurity Removal from Metallurgical Slag and Strengthening Metallurgical Process by External Electric Field},
      journal = {Journal of Energy and Natural Resources},
      volume = {10},
      number = {2},
      pages = {39-45},
      doi = {10.11648/j.jenr.20211002.11},
      url = {https://doi.org/10.11648/j.jenr.20211002.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jenr.20211002.11},
      abstract = {Based on the demand of the development of circular economy, the utilization of metallurgical solid waste has attracted more and more attention, one of the main ways of comprehensive utilization of metallurgical slag is internal recycling in steel plant to replace limestone as smelting flux, so it need to removal of phosphorus and sulfur from molten slag to decrease the burden of dephosphorization and desulfurization in the steelmaking process. In this paper, the current recycling situation of phosphorus-containing steel slag and sulfur-containing waste refining slag is briefly summarized, these relevant researches show that, the methods of dephosphorization of steel slag include reduction method (such as carbon reduction method or silicon reduction method) and gasification method, the dephosphorization ratio with reduction method reached 95.5%, and the greatest dephosphorization rate with gasification method can reach 81.23%, these treatment methods need a long time and treatment temperature is too high. Two main methods to remove sulfur from refining slag, oxidation method and hydrothermal method, oxidative roasting desulfurization and the sulfur removal rate was about 95%. And the latest research progress of using electric field to strengthen slag-metal reaction and component migration in metallurgical melt is also summarized. Electric field treatment of metallurgical melts can affect the physicochemical properties, such as viscosity, solidification structure, grain refinement, material properties, partition coefficient of component and the activity of solute, etc. It can enhances mass transfer reaction in metallurgical process and make oxygen transfer between molten iron and molten copper increase 2~3 times. It also can enhanced the migration ability of components between molten slag and metal, it is a great significance for electric field strengthening slag desulfurization because of enough sulfur ions in slag. There is a non-equilibrium phosphorus capacity different from conventional thermodynamic properties under the action of electric field, the lower non-equilibrium phosphorus capacity improves the phosphorus removal efficiency of phosphorus-containing steel slag.},
     year = {2021}
    }
    

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  • TY  - JOUR
    T1  - Research Progress of Impurity Removal from Metallurgical Slag and Strengthening Metallurgical Process by External Electric Field
    AU  - Wang Haichuan
    AU  - Liao Zhiyou
    AU  - Wang Bowen
    AU  - Wu Ting
    AU  - Lv Ningning
    AU  - Deng Aijun
    AU  - Wu Liushun
    Y1  - 2021/04/16
    PY  - 2021
    N1  - https://doi.org/10.11648/j.jenr.20211002.11
    DO  - 10.11648/j.jenr.20211002.11
    T2  - Journal of Energy and Natural Resources
    JF  - Journal of Energy and Natural Resources
    JO  - Journal of Energy and Natural Resources
    SP  - 39
    EP  - 45
    PB  - Science Publishing Group
    SN  - 2330-7404
    UR  - https://doi.org/10.11648/j.jenr.20211002.11
    AB  - Based on the demand of the development of circular economy, the utilization of metallurgical solid waste has attracted more and more attention, one of the main ways of comprehensive utilization of metallurgical slag is internal recycling in steel plant to replace limestone as smelting flux, so it need to removal of phosphorus and sulfur from molten slag to decrease the burden of dephosphorization and desulfurization in the steelmaking process. In this paper, the current recycling situation of phosphorus-containing steel slag and sulfur-containing waste refining slag is briefly summarized, these relevant researches show that, the methods of dephosphorization of steel slag include reduction method (such as carbon reduction method or silicon reduction method) and gasification method, the dephosphorization ratio with reduction method reached 95.5%, and the greatest dephosphorization rate with gasification method can reach 81.23%, these treatment methods need a long time and treatment temperature is too high. Two main methods to remove sulfur from refining slag, oxidation method and hydrothermal method, oxidative roasting desulfurization and the sulfur removal rate was about 95%. And the latest research progress of using electric field to strengthen slag-metal reaction and component migration in metallurgical melt is also summarized. Electric field treatment of metallurgical melts can affect the physicochemical properties, such as viscosity, solidification structure, grain refinement, material properties, partition coefficient of component and the activity of solute, etc. It can enhances mass transfer reaction in metallurgical process and make oxygen transfer between molten iron and molten copper increase 2~3 times. It also can enhanced the migration ability of components between molten slag and metal, it is a great significance for electric field strengthening slag desulfurization because of enough sulfur ions in slag. There is a non-equilibrium phosphorus capacity different from conventional thermodynamic properties under the action of electric field, the lower non-equilibrium phosphorus capacity improves the phosphorus removal efficiency of phosphorus-containing steel slag.
    VL  - 10
    IS  - 2
    ER  - 

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Author Information
  • School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China

  • School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China

  • School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China

  • School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China

  • School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China

  • School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China

  • School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China

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