Patent · US Expired

Method of treating sulfur-containing metallurgical materials

US4329170A · kind A · utility

1Cited by

6References

8Claims

0Family size

Assignee

Norddeutsche Affinerie Aktiengesellschaft

Inventors

Anton Schummer · Hamburg, DE
Uwe Hansen
Michael Kopke · Hamburg, DE

Key dates

Filing date	Sep 11, 1979
Grant date	May 11, 1982
Priority date	—
Expiry date	Sep 11, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22B1/02
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

In the processing of sulfur-containing metallurgical intermediates, sulfide ores or ore concentrates at a flame temperature of at least 1500.degree. C. in which sulfur dioxide and a melt are formed, acid sludge from the acid treatment of petroleum and mineral oils is substituted for at least a portion of the fuel. The acid sludge contains at most 85% by weight of inorganic components and is preferably introduced through a lance together with the combustion-sustaining gas and any additional fuel, usually in the form of oil.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.