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Reborn of steelmaking slag as multi-functional fertilizer by the control of mineralogical structure.

Research Project

Project/Area Number 15K14189
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Metal making/Resorce production engineering
Research InstitutionTohoku University

Principal Investigator

KITAMURA SHINYA  東北大学, 多元物質科学研究所, 教授 (80400422)

Co-Investigator(Kenkyū-buntansha) 高 旭  東北大学, 多元物質科学研究所, 助教 (80707670)
Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords製鋼スラグ / 肥料 / 溶出 / 鉄イオン / ガラス / 含鉄資材 / 水田
Outline of Final Research Achievements

The supplement of Fe iron is imperative to suppress the “Aki-ochi” which means the sudden deteriorate of paddy growth in the early autumn. Steelmaking slag contains much Fe oxide and Fe ion mostly supplied from the glassy phase. In this research, dissolution behavior of Fe ion from glassy phase which synthesized by quenching of slags with various composition was investigated and clarified the condition to improve the dissolution efficiency. The basic condition of experiment was set as pH=5 and oxidation condition which simulated the early period after irrigation of paddy field and pH, oxidation-reduction potential (ORP) and acid to control pH were changed. The results showed that to improve the efficiency of Fe supply, the basicity (CaO/SiO2) should be controlled between 0.67 to 0.84, Fe oxide content should be larger than 30 mass% and the valence of Fe should be 2+ in CaO-FeOx-SiO2 glassy phase. In addition, the lower pH and lower ORP promoted the dissolution of Fe.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (6 results)

All 2017 2016

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Dissolution Behavior of Fe from Glassy Oxide Phase in Steelmaking Slag2017

    • Author(s)
      Shohei Koizumi, Xu Gao, Shigeru Ueda and Shin-ya Kitamura
    • Journal Title

      Proceedings of the 8th International Symposium on High Temperature Metallurgical Processing

      Volume: 1

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Application of Fertilizer Made of Steelmaking Slag in the Recovery of Paddy Fields Damaged by the Tsunami of 20112016

    • Author(s)
      Xu Gao, Toyoaki Ito, Hisashi Nasukawa and Shin-ya Kitamura
    • Journal Title

      ISIJ Inter.

      Volume: 56 Issue: 6 Pages: 1103-1110

    • DOI

      10.2355/isijinternational.isijint-2015-640

    • NAID

      130005164529

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] CaO-SiO2-FeOx系非結晶相からのFe溶出に対するpH、ORP、及び酸の種類の影響2017

    • Author(s)
      小泉匠平, 高旭, 植田滋, 北村信也
    • Organizer
      日本鉄鋼協会第173回春季講演大会
    • Place of Presentation
      首都大学東京(東京都八王子市)
    • Year and Date
      2017-03-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Dissolution Behavior of Fe from Glassy Oxide Phase in Steelmaking Slag2017

    • Author(s)
      Shohei Koizumi, Xu Gao, Shigeru Ueda and Shin-ya Kitamura
    • Organizer
      TMS2017
    • Place of Presentation
      San Diego, USA
    • Year and Date
      2017-02-27
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CaO-SiO2-FeOx系非結晶相からの Fe の溶出に対する組成の影響2016

    • Author(s)
      小泉匠平, 高旭, 植田滋, 北村信也
    • Organizer
      日本鉄鋼協会第172回秋季講演大会
    • Place of Presentation
      大阪大学(大阪府豊中市)
    • Year and Date
      2016-09-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] CaO-SiO2-FeOx系非結晶相の水溶性に対する組成の影響2016

    • Author(s)
      小泉匠平
    • Organizer
      日本鉄鋼協会学生ポスターセッション
    • Place of Presentation
      東京理科大学(東京都)
    • Year and Date
      2016-03-23
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2018-03-22  

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