应用化学 ›› 1990, Vol. 0 ›› Issue (6): 43-47.
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金作美, 刘恒
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Jin Zuomei, Liu Heng
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摘要： 本文研究了用Fe2(SO4)3、MnO2、FeCl3、CuCl2等浸出黄铜矿时Ag+的作用。Ag+在氯化物溶液中不起催化作用。但在酸性Fe2(SO4)3及MnO2溶液中可使反应速率常数提高200倍,文中导出了在Ag+催化作用下硫酸高铁浸出黄铜矿的动力学方程。确定了速率控制步骤是离子通过产物硫层的扩散过程,活化能为35.7kJ/mol。探讨了银催化浸出黄铜矿的反应机理。
关键词: 黄铜矿, 硫酸高铁, Ag+催化浸出
Abstract: The effects of silver on the chalcopyrite leaching have been studied. No catalytic effect was found when FeCl3 and CuCl2 were used as oxidizing agent. In the case of Fe2(SO4)3 and MnO2 the reaction rate constants were found to be increased 200 times as compared with that without silver additives. In the acidic Fe2(SO3)2 leaching of chalcopyrite the reaction rate is controlled by ion diffussion through the elemental sulfur layer. The apparent activation energy is 35.7 kJ/mol. The order of reaction is 1.5 with respect to silver ion concentration and first order with respect to ferric ion concentration. The rate Constant of the diffusion controlled reaction is inversely propotional to the square root of the initial radius of chalcopyrite particles. The overall reaction kinetics equation has been derived.
Key words: chalcopyrite, ferricsulfate, silver ion, catalytic leaching
金作美, 刘恒. 银在浸出黄铜矿中的催化作用[J]. 应用化学, 1990, 0(6): 43-47.
Jin Zuomei, Liu Heng. CATALYTIC ACTION OF SILVER IN CHALCOPYRITE LEACHING[J]. Chinese Journal of Applied Chemistry, 1990, 0(6): 43-47.
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