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:
Feb. 13, 2007
Filed:
Feb. 27, 2004
Applicants:
Stephen M. Potter, Rio de Janeiro, BR;
John Y. Clark, Brasilia D.F., BR;
Inventors:
Stephen M. Potter, Rio de Janeiro, BR;
John Y. Clark, Brasilia D.F., BR;
Assignee:
Rio Tinto Brasil, , BR;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21B 13/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pretreatment process for solid lump feed material for a gas and pellet/lump-based direct reduction process, comprising preheating feed material to a temperature of from about 200 C to about 500 C, without reduction, in a non-reducing atmosphere prior to charging the feed material to gas-based direct reduction furnace, thereby minimizing the formation of fines within the furnace.