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| FLUIDIZED CEMENTATION OF COPPER FROM ITS DILUTE AQUEOUS SOLUTION |
| LIU HSI-HUAN; CHNG CHIEN-SHNG; MOOSON KWAUK(Institute of Chemical Metallurgy; Academia Sinica) |
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Cite this article:
LIU HSI-HUAN; CHNG CHIEN-SHNG; MOOSON KWAUK(Institute of Chemical Metallurgy; Academia Sinica). FLUIDIZED CEMENTATION OF COPPER FROM ITS DILUTE AQUEOUS SOLUTION. Acta Metall Sin, 1966, 9(1): 25-117.
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Abstract On the basis of a proposed reaction mechanism for cementation of copper from its aqueous solution by means of metallic iron, the authors suggested a method employing fluidized iron pellets for recovering copper on an industrial scale.During the initial stage of the reaction, the rate of cementation conforms to a firstorder reaction controlled mainly by the concentration of copper ion at the iron-copper boundary. As cementation proceeds, however, metallic copper collects as a porous layer on the iron, and diffusion of copper ion through this layer becomes the rate-controlling step of the process.Experiments on cementation of copper in a conical bed of fluidized iron pellets indicate that the copper layer formed peels off continuously as a result of the turbulent motion of the stream and mutual collision of the iron pellets, and is thus carried away by the flowing liquid from the reaction zone. The adoption of the conical bed insures complete fluidization of all the iron pellets having a wide particle-size range which results from their different residence time in the cementation reactor. The operation of a fluidized cementator is simple and is particularly adaptable to automation. When cast iron beads are used, 90% of the copper contained in a 0.1% Cu~(2+) solution is recovered at an operating temperature of 75℃ during an average solution residence time of 20 seconds.
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Received: 18 January 1966
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[1] 著,胡为柏译:铜镍冶金学,(高等教育出版社,1955年),397页.
[2] Newton, J.: Extractive Metallurgy, (Wiley, 1959) , p. 423．
[3] 谭庆麟、王永祿:金属学报,1964,7,136．
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[5] 中国科学院化工冶金研究所流态化组:在液体流态化床内用铁置换铜,1959年4月(未发表). |
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