Method of continuous metallurgical processing of copper-lead matte

US4614541A · kind A · utility

Assignee

• Norddeutsche Affinerie Aktiengesellschaft

Inventors

• Gerhard Berndt · Seevetal, DE
• Werner Marnette · Tostedt, DE

Key dates

• Filing date: Aug 16, 1985
• Grant date: Sep 30, 1986
• Expiry date: Aug 16, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22B15/0041
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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.degree. 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.degree. 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…