Apparatus for the continuous measurement of the oxygen content o

Details Apparatus for the continuous measurement of the oxygen content o Apparatus for the continuous measurement of the oxygen content o

1975-07-21

1977-01-18

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

324 30R, G01N 2746

Patent

active

040038149

ABSTRACT:
An apparatus for the continuous measurement of the oxygen content of molten copper and alloys thereof is disclosed. The apparatus comprises an austenitic stainless steel tube possessing a large heat capacity and capable of withstanding the operative conditions of molten copper and alloys thereof, a closed end tube of solid electrolyte inserted inside the stainless steel tube and projecting from the end of the stainless steel tube a distance at least equal to the diameter of the solid electrolyte tube, a relatively thick layer of fine grained alumina cement inserted between the stainless steel tube and the solid electrolyte tube for cementing the stainless steel tube to the solid electrolyte tube, and threads on the inside of the stainless steel tube for permitting the alumina cement to stick to the stainless steel tube. A first electrical connection is provided with the inside of the solid electrolyte tube at the bottom thereof wherein a predetermined reference oxygen potential is maintained, and a melt contact is immersed in the molten copper or alloy thereof for providing a second electrical connection with the outside of the solid electrolyte so as to measure the difference of potential between the two faces of the solid electrolyte as an indication of the oxygen content of the molten copper or alloy thereof.

REFERENCES:
patent: 3642599 (1972-02-01), Franz
patent: 3661749 (1972-05-01), Richardson
patent: 3784459 (1974-01-01), Jackson
patent: 3864232 (1975-02-01), Handman et al.
Kinzel et al., "The Alloys of Iron and Chromium", 1940, p. 369.

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