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. 24, 2016
Filed:
Feb. 27, 2004
Applicants:
Stephen M. Potter, Rio de Janeiro, BR;
Pedro Gutemberg Quariguasi Netto, Rio de Janeiro, BR;
Inventors:
Stephen M. Potter, Rio de Janeiro, BR;
Pedro Gutemberg Quariguasi Netto, Rio de Janeiro, BR;
Assignee:
VALE S.A., Rio de Janeiro, BR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21B 13/02 (2006.01); C21B 13/14 (2006.01); C22B 1/00 (2006.01); C22B 5/12 (2006.01);
U.S. Cl.
CPC ...
C21B 13/14 (2013.01); C21B 13/02 (2013.01); C22B 1/00 (2013.01); C22B 5/12 (2013.01); C21B 2100/02 (2013.01); C21B 2100/04 (2013.01); Y02P 10/136 (2015.11); Y02P 10/265 (2015.11); Y02P 10/283 (2015.11);
Abstract
An improved method and apparatus for pretreatment of solid lump feed material for gas and pellet/lump-based direct reduction processes, by initially storing the lump feed in stockpiles for stress release, followed by pre-drying the feed material prior to charging into the reduction furnace and finally increasing the average temperature of the reduction furnace, in order to reduce the amount of reduction at low temperatures, thereby minimizing the formation of fines within the furnace.