PROCESS FOR PURIFYING RAW MATERIAL OF COPPER OR ITS ALLOY

Title:

PROCESS FOR PURIFYING RAW MATERIAL OF COPPER OR ITS ALLOY

Document Type and Number:

WIPO Patent Application WO/1993/002219

Kind Code:

A1

Abstract:

A process for purifying the raw material of copper or its alloy containing at least one element selected among Pb, Ni, Sb, S, Bi and As, and further, under certain circumstances, at least one element selected among Sn, Fe and Zn as impurity metal elements, said process comprising: step 1 wherein the raw material of copper or its alloy is melted; step 2a (conducted when at least one of Sn, Fe and Zn is contained as the impurity element in the raw material) wherein the concentration of oxygen contained in the melt is increased to oxidize the Sn, Fe and/or Zn contained in the melt into slag; step 2b wherein at least one member selected from the group consisting of Fe, its oxide, Mn and its oxide is added to the melt to convert Pb, Ni, Sb, S, Bi and/or As contained in the melt into composite oxide(s) of Fe and/or Mn as slag; step 3 wherein the formed slags are removed; and step 4 wherein the resultant melt is reduced.

More Like This:

JPS5757843	SMELTING METHOD
WO/1989/001530	METALLURGICAL CONTROLLING METHOD

Inventors:

NAKAMURA TAKASHI (JP)
OSUMI KENJI (JP)
OGA KIYOMASA (JP)
ARAI MOTOHIRO (JP)
IKEDA RYUKICHI (JP)

Application Number:

PCT/JP1992/000358

Publication Date:

February 04, 1993

Filing Date:

March 25, 1992

Export Citation:

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Assignee:

KOBE STEEL LTD (JP)

International Classes:

C22B15/00; C22B15/14; (IPC1-7): C22B15/14

Foreign References:

JPS60162737A	1985-08-24
JPS61217538A	1986-09-27

Other References: