METHOD FOR VACUUM-REFINING CRUDE COPPER

METHOD FOR VACUUM-REFINING CRUDE COPPER

PURPOSE:To remove efficiently impurities from crude copper by melting the crude copper in a vacuum furnace and bringing the molten crude copper into contact with a gas contg. oxygen. CONSTITUTION:Crude copper is melted by heating to about 1,200-1,350 deg.C in a vacuum furnace kept at about 0.05-100T...

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Hauptverfasser: YABE TOORU, KATOU MASANORI, HINO JIYUNZOU
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator YABE TOORU
KATOU MASANORI
HINO JIYUNZOU
description PURPOSE:To remove efficiently impurities from crude copper by melting the crude copper in a vacuum furnace and bringing the molten crude copper into contact with a gas contg. oxygen. CONSTITUTION:Crude copper is melted by heating to about 1,200-1,350 deg.C in a vacuum furnace kept at about 0.05-100Torr degree of vacuum. A gas contg. oxygen such as air is introduced into the furnace from a hole pierced in the furnace, and the gas is brought into contact with the molten crude copper. Impurities, especially Sb, Bi and As are efficiently removed from the crude copper.
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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title METHOD FOR VACUUM-REFINING CRUDE COPPER
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