Recycling Effects of Residual Slag after Magnetic Separation for Phosphorus Recovery from Hot Metal Dephosphorization Slag

被引:45
|
作者
Matsubae-Yokoyama, Kazuyo [1 ]
Kubo, Hironari [1 ]
Nagasaka, Tetsuya [1 ]
机构
[1] Tohoku Univ, Grad Sch Environm Studies, Sendai, Miyagi 9808579, Japan
基金
日本科学技术振兴机构;
关键词
multi-phase flux; hot metal pretreatment; dephosphorization; slag recycling; waste input-output analysis;
D O I
10.2355/isijinternational.50.65
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
In a previous study, the authors found that phosphorus exhibits remarkable segregations in industrial hot metal pretreatment slag where it exists as a Ca(3)P(2)O(8)-Ca(2)SiO(4) solid solution together with a FeO-CaO-SiO(2)-MnO-MgO matrix. Since the magnetic property of each phase is significantly different, it is possible to separate the phases with the aid of a superconducting strong magnetic field. By applying a strong magnetic field of 0.5 to 2.5 T to the crushed slag, more than 60% of the concentrated phosphorus phase in the slag was recovered. If most of the phosphorus can be removed from the slag, the residual slag will comprise FeO-CaO-SiO(2)-MnO-MgO with less P(2)O(5), and thus may be recycled to iron- and steel-making processes, such as sintering, hot-metal desiliconization, and hot-metal dephosphorization processes. In the present work, the recycling effect of subjecting the residual slag to the dephosphorization process was simulated based on a mass balance calculation. A significant reduction in total slag generation and CaO input was demonstrated by the mathematical model considering phosphorus recovery and recycling of residual slag as a dephosphorization agent. Using the waste input-output model, it was shown that phosphorus recovery from dephosphorization slag and the recycling of residual slag in a hot-metal dephosphorization process have potentially great environmental and economic benefits.
引用
收藏
页码:65 / 70
页数:6
相关论文
共 50 条
  • [1] Recycling Effect of Residual Slag after Magnetic Separation for Phosphorus Recovery from Hot Metal Dephosphorization Slag
    Matsubae-Yokoyama, Kazuyo
    Kubo, Hironari
    Nagasaka, Tetsuya
    [J]. TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 2009, 95 (03): : A306 - A312
  • [2] ENRICHMENT, SEPARATION, AND RECOVERY OF PHOSPHORUS FROM DEPHOSPHORIZATION SLAG
    Yan-Ling, Z.
    Ming, G.
    Feng-Shan, L.
    Kan, Y.
    [J]. ARCHIVES OF METALLURGY AND MATERIALS, 2018, 63 (04) : 1769 - 1783
  • [3] Recovery of Phosphorus from Dephosphorization Slag Produced by Duplex High Phosphorus Hot Metal Refining
    Diao, Jiang
    Xie, Bing
    Wang, Yonghong
    Guo, Xu
    [J]. ISIJ INTERNATIONAL, 2012, 52 (06) : 955 - 959
  • [4] Magnetic Separation of Phosphorus Enriched Phase from Multiphase Dephosphorization Slag
    Kubo, Hironari
    Matsubae-Yokoyama, Kazuyo
    Nagasaka, Tetsuya
    [J]. ISIJ INTERNATIONAL, 2010, 50 (01) : 59 - 64
  • [5] Magnetic Separation of Phosphorus Enriched Phase from Multiphase Dephosphorization Slag
    Kubo, Hironari
    Matsubae-Yokoyama, Kazuyo
    Nagasaka, Tetsuya
    [J]. TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 2009, 95 (03): : A300 - A305
  • [6] Reduction behaviors of hot metal dephosphorization slag in a slag regenerator
    Ishikawa, M
    [J]. ISIJ INTERNATIONAL, 2006, 46 (04) : 530 - 538
  • [7] Complete Hot-recycling Technique of Dephosphorization Slag for Hot Metal Pretreatment with Convertor
    Negishi, Hidemitsu
    Uchida, Yu-Ichi
    Kawabata, Ryo
    [J]. Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 2024, 110 (13): : 999 - 1009
  • [8] RATE OF DEPHOSPHORIZATION OF HOT METAL BY MOLTEN SLAG
    MORI, K
    [J]. TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1986, 72 (12): : S944 - S944
  • [9] SODA SLAG SYSTEM FOR HOT METAL DEPHOSPHORIZATION
    PAK, JJ
    FRUEHAN, RJ
    [J]. METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1986, 17 (04): : 797 - 804
  • [10] EFFECTS OF VARIOUS SLAG SYSTEMS ON METAL/SLAG SEPARATION OF CCA AND SLAG COMPOSITION ON DESULFURIZATION AND DEPHOSPHORIZATION OF IRON NUGGET
    Park, Ji-Ook
    Jung, Sung-Mo
    [J]. ADVANCES IN MOLTEN SLAGS, FLUXES, AND SALTS, 2016, : 1025 - 1030