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Thermodynamic Investigations of New Cobalt Smelting for Cobalt Rich Crust

Research Project

Project/Area Number 18560709
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionIwate University

Principal Investigator

YAMAGUCHI Katsunori  Iwate University, Faculty of Engineering, Professor (70220259)

Co-Investigator(Kenkyū-buntansha) OKURA Takahiko  Akita University, Venture Business Laboratory, Professor (00400523)
UEDA Shigeru  Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Assistant Professor (80359497)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,840,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsCobalt / Smelting Process / Manganese / Phosphorus / Phase Diagram / スラグ / コバルトリッチクラスト / 不純物分配
Research Abstract

The fundamental investigations for a phase diagram and thermodynamic properties of the MnO-SiO2-CaO and FeO-SiO2-CaO slag systems with iron saturation were carried out in an aim to develop new cobalt smelting for a cobalt rich crust.
The phase diagram of the MnO-SiO2-CaO system was determined at 1573K with iron saturation. The liquidus lines and phase equilibrium relations are agreement with the previous data by Glasser et al.
Distribution ratios of cobalt and phosphorus between the MnO-SiO2-CaO or FeO-SiO2-CaO slags and liquid iron were measured at 1823K. the values of cobalt between the MnO-SiO2-CaO or FeO-SiO2-CaO slags and iron showed the around 0.001-0.01, and the cobalt is enriched to liquid iron. The ratios of phosphorus between the MnO-SiO2-CaO or FeO-SiO2-CaO slags and liquid iron increased with increasing of CaO concentration in the slag. CaO rich slags are available for the elimination of phosphorus from Co-Fe alloys.
Based on the distribution ratios, the activity coefficients of CoO and PO2.5 in the MnO-SiO2-CaO and FeO-SiO2-CaO slags were derived at 1823K. The values for CoO in the MnO-SiO2-CaO slag system were form 1 to 2, and these values for FeO-SiO2-CaO slags were around 0.2-0.4. On the other hand, the activity coefficients of PO2.5 in the MnO-SiO2-CaO and FeO-SiO2-CaO slags showed very small values as γ=10^<-8>-10^<-4>.

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (5 results)

All 2007

All Journal Article (3 results) (of which Peer Reviewed: 1 results) Presentation (2 results)

  • [Journal Article] 1823Kにおける溶鉄とSiO2-CaO-FeOx系スラグ間のコバルトの分配2007

    • Author(s)
      伊藤亮、山口勉功
    • Journal Title

      資源・素材2007 2

      Pages: 239-240

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Distribution rations of cobalt between the FeO-SiO2-CaO slags and liquid iron at 1823K2007

    • Author(s)
      Ryo Ito and Katsunori Yamaguchi
    • Journal Title

      Shigen to Sozai 2007 Vol. 2

      Pages: 239-240

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] MnO-CaO-SiO_2系スラグと溶鉄間のリンとコバルトの分配挙動2007

    • Author(s)
      伊藤 亮
    • Journal Title

      資源・素材学会春季大会講演集 (II) 素材編

      Pages: 79-80

    • Related Report
      2006 Annual Research Report
  • [Presentation] コバルトリッチクラストを原料とした新コバルト製錬に関する熱力学的研究2007

    • Author(s)
      伊藤亮、山口勉功
    • Organizer
      日本金属学会東北支部研究発表大会
    • Place of Presentation
      弘前大学
    • Year and Date
      2007-11-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Thermodynamic Investigations of New Cobalt Smelting for Cobalt Rich Crust2007

    • Author(s)
      Ryo Ito and Katsunori Yamaguchi
    • Organizer
      Annual meeting of Tohoku branch of The Japan Institute of Metals
    • Place of Presentation
      Hirosaki University
    • Year and Date
      2007-11-22
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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