Materials Transactions Online

Transactions of the Japan Institute of Metals, Vol. 14 No. 4 (1973) pp.261-266
© 1973 The Japan Institute of Metals

Electromotive Force of an Oxygen Concentration Cell and Magnetite Measurements in connection with the Vacuum Treatment of Molten Matte and White Metal*

Chikabumi Yamauchi** and Hiroshi Kametani**

The EMF of an oxygen concentration cell in sulfide melts (matte and white metal) has been measured under a reduced pressure of around 0.5 mmHg at 1200°C by means of a solid-electrolyte cell and the results are presented as a function of the calculated partial pressure of oxygen, together with the EMF of molten slag, blister copper, and the Cu-O system. Zinc in matte affects the EMF to a great extent.
The magnetite contents in matte, white metal, and slag are semi-quantitatively determined by a magnetic method. The amount of SO2 gas liberated during the vacuum treatment is discussed in relation to the difference of magnetite contents before and after the vacuum treatment.

(Received September 5, 1972)

* This paper was presented at the 1972 Spring Meeting of the Japan Institute of Metals.

** National Research Institute for Metals, Meguro-ku, Tokyo, Japan.

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