Title:
CONTINUOUS DRY REFINING METHOD AND APPARATUS OF COPPER/LEAD MAT
Document Type and Number:
Japanese Patent JPS6156258
Kind Code:
A
Abstract:
A method for the continuous pyrometallurgical processing of copper-lead matte having a high lead content relative to copper. In order to ensure an economical and ecologically satisfactory processing, the following steps are performed in a continuous sequence: (a) In one processing stage a suitable atmosphere is provided and temperatures above 1250 DEG C. and a high turbulence are maintained in a molten bath, volatile lead components are incorporated in a fine dust and liquid matte having a decreased lead content and metallic lead included in a copper-containing lead alloy are produced; (b) in another processing stage, gases which contain free oxygen are blown into or onto the liquid matte which has been produced in stage (a) and is at a temperature above 1250 DEG C. whereby a high-oxygen converter slag and a converter copper containing less than 1% by weight lead are produced and volatilizable impurities contained in the matte are incorporated in a fine dust; and (c) in a third processing stage the converter copper, which contains less than 1% by weight Pb and other impurities, such as Ni, As, Sb, is refined in that a gas which contains free oxygen is blown into or onto the molten bath. The impurities are slagged by a selective oxidation, and a prerefined copper is formed.
Inventors:
GERUHARUTO BERUNTO
BERUNAA MARUNETSUTE
BERUNAA MARUNETSUTE
Application Number:
JP17924685A
Publication Date:
March 20, 1986
Filing Date:
August 14, 1985
Export Citation:
Assignee:
NORDDEUTSCHE AFFINERIE
International Classes:
C22B13/02; C22B15/00; C22B15/06; C22B15/14; (IPC1-7): C22B13/02; C22B15/00; C22B15/14
Attorney, Agent or Firm:
Masaru Tsuchiya