日本金属学会誌

J. Japan Inst. Metals, Vol. 28, No. 12 (1964),
pp. 862-866

Fundamental Reactions in the Copper Smelting Process Based on the Diagram of the Cu-S-O System (A Study of Fundamental Reactions in Smelting Process under the Consideration of Phase Rule, Report 2)

Mitugu Kitano1

1The Faculty of Education, Kanazawa University,

Abstract:

In a previous report, the equilibrium diagram of Cu-S-O system at 760 mmHg has been determined by the author.
Using the Cu-S-O diagram, some considerations have been given to the fundamental reactions of copper smelting and the solidification of blister copper.

(1) The reactions of Cu2S with O2 at 760 mmHg are as follows.
[Cu2S] + O2 → [Cu2O] +SO2     at  650°C
[Cu2S] + O2 → [Cu] +SO2     at  900°C
(Cu2S  soln) + O2 → (Cu  soln) +SO2 } at  1150°C
(Cu  soln) + O2 → [Cu2O] +SO2

(2) The solidification process of blister copper may occur in the following order: (a), (b), (c) and (d).
(a) (Cu  soln) → SO2
(b) (Cu  soln) → [Cu] +SO2
(c) (Cu  soln) → [Cu] + [Cu2S] +SO2 or (L) → [Cu] + [Cu2O] +SO2
(d) [Cu] +SO2 → [Cu2S] + [Cu2O]


(Received 1964/7/1)

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