温度70から110℃における硫酸第二鉄溶液の加水分解によるゲーサイト沈殿

  • 佐々木 金一
    正会員 工博 秋田大学助教授 鉱山学部物質工学科
  • 大塚 健治
    正会員 エヌ·デー·ケー加工センター(株)
  • 渡部 充
    工博 元 秋田大学教授 鉱山学部物質工学科
  • 戸沢 一光
    正会員 工博 元 東北大学教授 選鉱製錬研究所

書誌事項

タイトル別名
  • Precipitation of Goethite by Hydrolysis Reaction in Ferric Sulphate Solutions between 70.DEG.C. and 110.DEG.C..
  • オンド 70 カラ 110ドC ニ オケル リュウサン ダイ2テツ ヨウエキ

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抄録

A hydrolysis reaction was carried out by adding a certain amount of zinc oxide into the sulphuric acid acidified ferric sulphate solutions with various concentrations at 70 °C, 80 °C, 90 °C, 100 °C and 110 °C respectively for more than 168 hours. The composition of solutions and the precipitation of goethite, which were balanced with solutions at an equilibrium state when the hydrolysis reaction proceeded to completion, were examined. It was found that the precipitation of goethite occurred from the region where ferric ion concentration increased slightly with an increase of the sulphuric acid concentration to the region where ferric ion concentration increased suddenly. In the region where goethite was precipitated, the sulphuric acid concentration in the solution increased with raising temperature, e. g. the precipitation of goethite occurred in the solution with the sulphuric acid concentration up to 8.4 g/l at 70 °C, 11.8 g/l at 80 °C, 15.5 g/l at 90 °C, 16.5 g/l at 100 °C, and 21.0 g/l at 110 °C respectively. The ferric ion concentration increased with an increase of the sulphuric acid concentration at the same temperature, and decreased with raising temperature at the same sulphuric acid concentration. A plot of logarithmic value of sulphuric acid concentration against logarithmic value of ferric ion concentration showed a linear relationship which can be expressed by empirical formulas at the individual temperature.

収録刊行物

  • 資源と素材

    資源と素材 114 (1), 47-56, 1998

    一般社団法人 資源・素材学会

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