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| THE KINETICS OF REACTION OF MOLTEN CUPROUS SULPHIDE WITH HYDROGEN |
| Liu Chun-peng Guo You-gen Ai Yong-heng (Kunming College of Engineering) |
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Cite this article:
Liu Chun-peng Guo You-gen Ai Yong-heng (Kunming College of Engineering). THE KINETICS OF REACTION OF MOLTEN CUPROUS SULPHIDE WITH HYDROGEN. Acta Metall Sin, 1978, 14(4): 373-382.
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Abstract The kinetics of reaction of molten cuprous sulphide with hydrogen has been investigated at 1150, 1200 and 1250℃ respectively. The kinetics equations obtained are: for single phase, u_S％=d(S％)/dτ=k_S(S％-a)~2p_(H_2)~(1/2) for two phases coexisted, u_S％=d(S％)/dτ=AP_(H_2)~(1/2) The rates of these reactions were constant when certain phase transformation occurred or two phases coexisted. The plots of these reation-rates against concentration of sulphur according following equations: showed a turning-point for each temperature. At the turning point of reaction rate, its sulphur content in cuprous sulphide melts at the beginning to form two phases are 19.805, 19.73 or 19.61 wt.％ at 1150, 1200 or 1250℃ respectively.The reaction rate constant and its activation energy have been found to be:k_(1150·C)=3.27×10~(-2), k_(1200·C)=3.76×10~(-2)and k_(1250·C)=4.12×10~(-2) min~(-1), S％~(-1), atm~(-1/2) and E=11000 cal./mol of Cu_2S. Thus the effect of temperature on the reaction rate appears to be not remarkable.Discussion has been given on relation between the phase diagram of the Cu-S system vs their reaction rates.
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Received: 18 April 1978
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[6] 柳喬哲夫,日本鉱業会誌,78(1962) ,№ 883(1) ,43． |
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