Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By means introducing treating material
Reexamination Certificate
2007-09-04
2007-09-04
Kastler, Scott (Department: 1742)
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
By means introducing treating material
C266S234000
Reexamination Certificate
active
10333222
ABSTRACT:
A process and a device serve for decreasing the oxygen content of a copper melt. One or more flushing plugs, from which a scavenging gas emerges, are arranged in the perpendicular direction in the lower region of the copper melt. The scavenging gas ascends into the copper melt, and the copper melt itself is electrically stirred. The copper is initially melted in a shaft furnace, and then it is led to a treatment furnace via a transportation channel. As a result of flowing out of the flushing plugs, the scavenging gas ascends into the copper melt both in the region of the transportation channel and also in the region of the treatment furnace. The scavenging gas flows out of at least one of the flushing plugs with a composition corresponding to 30% to 70% reducing gas and 70% to 30% inert gas.
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Khoury Alexander
Schliefer Heinrich
Schneider Stefan
Harness Dickey & Pierce
Kastler Scott
Norddeutsche Affinerie Aktiengesellschaft
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