Dephosphorization of Solid High-carbon Ferromanganese by NaOH-NaCl

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  • KANEKO Kyojiro
    Faculty of Engineering, The Unrversity of Tokyo, Now Ibaraki Lad. Go., Ltd.
  • SANO Nobuo
    Faculty of Engineering, The University of Tokyo

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Other Title
  • NaOH-NaClによる固体高炭素フェロマンガン粒の脱りん
  • NaOH-NaClによる固体高炭素フェロマンガン粒の脱りん(寄書)
  • NaOH NaCl ニヨル コタイ コウ タンソ フェロマンガンリュウ ノ ダ

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Abstract

Solid ferromanganese particles ranging from 0.59 to 2.38 mm in diameter were dephosphorized using NaOH-NaCl melts at temperatures of 900 to 1000°C. Thermodynamically, the oxidation of phosphorus from ferromanganese without oxidation loss of manganese is very difficult, and hence sodium hydroxide was chosen from the consideration that sodium has strong tendency to form the phosphate. The dephosphorization of 60 to 70% was attained at best with lOg of ferromanganese and 1 gNaOH-2gNaCl mixture at 950°C by 2 hours treatment. Dephosphorization did ont proceed when sodium chloride was not added to sodium hydroxide, in which case only manganese was oxidized.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 69 (3), 480-482, 1983

    The Iron and Steel Institute of Japan

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