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Continuous Reduction Process of Titanium Chloride by Magnesium

Research Project

Project/Area Number 10355031
Research Category

Grant-in-Aid for Scientific Research (A).

Allocation TypeSingle-year Grants
Section展開研究
Research Field Metal making engineering
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

ONO Katsutoshi  Dept. energy sci. & tech., KYOTO UNIVERSITY Prof., エネルギー科学研究科, 教授 (10026049)

Co-Investigator(Kenkyū-buntansha) SUZUKI Ryosuke  Dept. energy sci. & tech., KYOTO UNIVERSITY Assoc. Prof., エネルギー科学研究科, 助教授 (80179275)
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥29,900,000 (Direct Cost: ¥29,900,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1998: ¥26,600,000 (Direct Cost: ¥26,600,000)
Keywordstitanium chloride / Magnesium / Reduction / Fine Powder / Niobium chloride / Tantalum chloride / Molten Salt / Magnesium Chloride / チタン製造 / 製錬 / 還元反応 / 凝集
Research Abstract

A process to produce titanium metal in the molten salt was developed for continuous reduction. Titanium chloride and magnesium, which are used as raw materials for the conventional process, are separated into the two molten layers because of density difference. Titanium chloride gas is blown into the lower molten salt, and reduced by the upper magnesium. Titanium settled in the salt piles up on the vessel bottom, and it is extracted from the molten salt.
The salt composition was chosen from KCI, NaCl and LiCl, to separate the molten salt and the reductant. The dense MgO was suitable for the crucible material. The obtained powder was about 1/10 finer than the titanium particle by the Kroll method. The main mechanism of reduction was the reduction by magnesium dissolved in the molten salt, and the reduction in the magnesium layer was additive. Considering this mechanism clarified here, a new technique that titanium chloride is blown without any direct contact with metallic magnesium was proposed. The yield was over 80%.
On the other hand, the obtained particles were so small and well isolated that the separation from the salt became difficult. First solution was to adapt the condensification process such as liquid cyclone. The excess reductant adhered to titanium particles and enhanced the corsening. The second solution was to take a two-stepwise reduction. In the first step, the lower titanium chlorides are formed in the molten salt by resolving a part of formed titanium powder. In the second step, these highly concentrated chlorides are reduced by magnesium. This proposal are easily operated continuously, and the coarser particles were recovered easily.
Similarly niobium and tantalum chlorides were reduced and their pure metallic powders were obtained. Their fine grain size was suitable for compact large capacity condensers.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] 出浦哲史: "チタン製錬技術の歩みと展望"金属. vol.47 No.9. 757-762 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] R.O.Suzuki: "Titanium Powder Preparation by Magnesiothermic Reduction of Ti^<2+> in the Molten Salt"Metall.Mater.Trans.B. 30B,No.6. 403-410 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.N.Deura.: "Titanium Powder Production by TiCl_4 Gas Injection into Magnesium through Molten Salts"Metall.& Mater.Trans.B. 29B,No.12. 1167-1174 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 出浦哲史: "溶融塩中でのチタン塩化物の還元による粉末チタンの製造"溶融塩および高温化学. vol.41 No.1. 7-16 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 小野勝敏: "チタン"チタン精錬反応の物理化学的評価. vol.48 No.1. 13-15 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] R.O.Suzuki: "TITANIUM POWDER PREPARATION FROM TiCl_4 IN THE MOLTEN SALT"Proc.of 2000 Powder and Powder Metallurgy World Congress, Kyoto,Japan. Vol.1. 401-404 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Nishiyama.: "NEEDLE-LIKE POWDER PREPARATION OF Ta AND Nb IN THE MOLTEN SALT"Proc.of 2000 Powder and Powder Metallurgy World Congress, Kyoto, Japan. Vol.1. 532-535 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.N.Deura: "Development of Titanium Refining"Kinzoku. vol.47 No.9. 757-762 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] R.O.Suzuki: "Titanium Powder Preparation by Magnesiothermic Reduction of Ti^<2+> in the Molten Salt"Metall.Mater.Trans.B. 30B[6]. 403-410 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.N.Deura: "Titanium Powder Production by TiCl_4 Gas Injection into Magnesium through Molten Salts"Metall. & Mater.Trans.B. 29B[12]. 1167-74 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.N.Deura: "Titanium Powder Production by Titanium Chloride Reduction Molten Salts"Molten Salt Chemistry. vol.41, No.1. 7-16 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] R.O.Suzuki: "TITANIUM POWDER PREPARATION BY Mg REDUCTION OF TITANIUM CHL0RIDES IN THE MOLTEN SALT"Proc.of 6th Intern.Conf.on Molten Slags, Fluxes and Salts, Stockholm, Sweden and Helsinki, Finland. 362. 1-24 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Ono: "Physical Chemistry Evaluation of Titanium Refining"Titanium. vol.48 No.1. 13-15 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] R.O.Suzuki: "TITANIUM POWDER PREPARATION FROM TiCl_4 IN THE MOLTEN SALT"Proc.of 2000 Powder and Powder Metallurgy World Congress, Kyoto, Japan. vol.1. 401-404 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Nishiyama: "NEEDLE-LIKE POWDER PREPARATION OF Ta AND Nb IN THE MOLTEN SALT"Proc.of 2000 Powder and Powder Metallurgy World Congress, Kyoto, Japan. vol.1. 532-535 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] R.O,Suzuki: "Ca-decxidation of Nb and Ti in Ca-Saturated CaCl_2 Molten Salt"Proc.of 6th Intern.Conf.on Molten Slags, Fluxes and Salts. 22.1-22.16 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] R.O,Suzuki: "Titanium Powder Preparation by Mg Reduction of Titanium Chlorides in the Molten Salt"Proc.of 6th Intern.Conf.on Molten Slags, Fluxes and Salts. 24.1-24.18 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Ono: "A Process for Continuous Titanium Production from Titanium Oxide"EPD Congress 2001. 79-87 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] R.O.Suzuki,T.H.Harada,T.Matsunaga,T.N.Dewa,K.Ono: "Titanium Powder Preparation by Magnesio thermic Reduction of Ti^<2+> in the Molten Salt"Metallurgy and Material Transactions. 30B・6号. 403-410 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] R.O.Suzuki,M.Aizawa,K.Ono: "Calcium-deoxidation of Niobium and Titanium in Ca-saturated CaCl2 Molten Salt"Journal of Alloys and Compounds. 288・1. 173-182 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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