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:
Aug. 15, 1989
Filed:
Dec. 15, 1987
Applicant:
Inventors:
Rolf Hauk, Dusseldorf, DE;
Gero Papst, Kaarst, DE;
Assignee:
Korf Engineering GmbH, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 38 ; 75 40 ; 201 27 ;
Abstract
A novel process for producing molten pig iron or steel raw material is described. The pig iron is initially at least partly reduced to sponge iron by means of a reducing gas and is then melted in a melting gasifier, being optionally finally reduced. Apart from the sponge iron, the melting gasifier is supplied with coal at least partly degassed by a hot gas and oxygen-containing gas. The hot gas used for this purpose is formed from the gas produced during degassing and a supplied, oxygen-containing gas. The latter is preferably constituted by air, which can be preheated by the gas produced during degassing.