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:
Apr. 26, 1988
Filed:
May. 27, 1986
Applicant:
Inventors:
Frans H Tuovinen, Ulvila, FI;
Seppo O Heimala, Pori, FI;
Stig-Erik Hultholm, Pori, FI;
Risto J Honkala, Vanha-Ulvila, FI;
Helge J Krogerus, Pori, FI;
Matti E Honkaniemi, Tornio, FI;
Assignee:
Outokumpu Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ; C22B / ; C21B / ;
U.S. Cl.
CPC ...
75 21 ; 75 40 ; 75 82 ; 75 84 ;
Abstract
A process for the exploitation of low-grade oxidic and iron-bearing complex ores or concentrates, whereby the initial materials are reduced in a rotary kiln at a temperature of 1000.degree.-1500.degree. C. in such a manner that the products are a magnetic fraction primarily consisting of iron, and a non-magnetic oxide fraction, the materials present in this fraction being further exploitable by conventional methods.