日本金属学会誌

J. Japan Inst. Metals, Vol. 35, No. 5 (1971),
pp. 527-533

Effects of Iron, Silicon, Nickel and Copper on the Reaction of Aluminum Subchloride Process (Study of Extractive Metallurgy of Aluminum (III))

Takeaki Kikuchi1

1National Research Institute for Metals, Tokyo. Present address: Department of Metallurgical Engineering, Niihama Technical College, Niihama

Abstract:

The effects of iron,silicon,nickel and copper on the reaction of aluminum subchloride process were investigated by the flow method of aluminum trichloride at reduced pressure and in the temperature range of 900°∼1100°C.
In all cases, the extraction rate of aluminum decreased with the increase in the contents of alloying elements, and increased with increasing temperature and supplying rate of aluminum trichloride. The extraction rate of aluminum could be expressed by the following equation including activity of aluminum and partial pressure of aluminum trichloride.

V = 1.28aAl2 · PAlCl34/3 · e-11800/RT    (Al g/cm2 · min)

The contents of silicon and iron in the deposited aluminum were about 0.2% and 0.05% respectively, and little amounts of copper and nickel transferred to the products. In addition, the experimental results were discussed using the thermodynamic calculation.


(Received 1971/2/12)

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