The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1982
Filed:
Sep. 11, 1979
Applicant:
Inventors:
Assignee:
Norddeutsche Affinerie, Hamburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 23 ; 75 74 ; 75 92 ;
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.