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:
Mar. 19, 1996
Filed:
Nov. 15, 1994
Applicant:
Inventors:
Heribert Konig, Duisburg, DE;
Heinz Stark, Essen, DE;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27D / ;
U.S. Cl.
CPC ...
373 78 ; 373-9 ; 373 81 ; 75 103 ; 75 104 ;
Abstract
A process and melting furnace unit are provided for extracting valuable substances by reducing oxygen-bound metals which process includes exposing a charge in a first reaction zone of a furnace vessel to heat energy so that a liquid slag floats on a metal melting bath, feeding the metal bath to a second reaction zone of the furnace vessel where the slag comes intimately into contact with a reducing agent, and feeding additional heat energy to the melt in the second reaction zone to prevent hardening.