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| THE KINETICS OF SULPHURIC ACID LEACHING OF SYNTHETIC γ-NiS UNDER OXYGEN PRESSURE |
| FANG Zhaoheng; XIA Guangxiang; CHEN Jiayong(CHEN Chiayung)(Institute of Chemical Metallurgy; Academia Sinica; Beijing)(Manuscript received 21 November; 1982; revised manuscript 4 May; 1983) |
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Cite this article:
FANG Zhaoheng; XIA Guangxiang; CHEN Jiayong(CHEN Chiayung)(Institute of Chemical Metallurgy; Academia Sinica; Beijing)(Manuscript received 21 November; 1982; revised manuscript 4 May; 1983). THE KINETICS OF SULPHURIC ACID LEACHING OF SYNTHETIC γ-NiS UNDER OXYGEN PRESSURE. Acta Metall Sin, 1984, 20(1): 123-130.
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Abstract The kinetics of oxygen leaching of synthetic γ-Nis, or milerite, in dilute H_2SO_4 solution under oxygen pressure, below 4900 kPa, at the temperature range from 110 to 160℃ was studied. The leaching rate can be described by an unreacted shrinking core with no solid product formed on the surface. The rate of reaction can be reflected by the following equation: 1-(1-α)~(1/3)=(k/ρr_0)t=Kt The rate Constant K in the above equation can be expressed as: K=1.45×10~5(4.55+1/(?)_0)P_(O_2)~(1/2)[H~+]~(?)e~(-11720/T) The reaction rate will be retarded by tbe Cu and Ag ions in solution.
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Received: 18 January 1984
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