Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2002-06-17
2008-12-09
King, Roy (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
Reexamination Certificate
active
07462219
ABSTRACT:
A method producing metallic iron by reducing raw materials including an iron-oxide containing material and a carbonaceous reducing agent under heating, which can minimize re-oxidization of the metallic iron and can efficiently produce metallic iron having a high metallization ratio and high iron purity at high yield. The method produces metallic iron, by heating raw materials including a carbonaceous reducing agent and an iron-oxide containing material in a reduction melting furnace of the moving hearth type, and reducing and melting iron oxides in the raw materials. The reduction melting furnace is partitioned into at least three zones in a hearth moving direction, at least one partitioned zone upstream in the hearth moving direction is a solid-state reducing zone, at least one downstream partitioned zone is a carburization melting zone, and a reduction aging zone is between the solid-state reducing zone and the carburization melting zone.
REFERENCES:
patent: 5989019 (1999-11-01), Nishimura et al.
patent: 6036744 (2000-03-01), Negami et al.
patent: 6630010 (2003-10-01), Ito et al.
patent: 2004/0083853 (2004-05-01), Sugitatsu et al.
patent: 2374700 (2006-10-01), None
patent: 1383453 (2002-12-01), None
patent: 0 969 105 (2000-01-01), None
patent: 1 050 589 (2000-11-01), None
patent: 11-172312 (1999-06-01), None
patent: 2001-20005 (2001-01-01), None
patent: 2001-181719 (2001-07-01), None
patent: WO 00/29628 (2000-05-01), None
patent: WO 01/73137 (2001-10-01), None
patent: WO 01/73137 (2001-10-01), None
Machine translation of JP 11-172312.
Machine translation of JP 2001-181719.
Kikuchi Shoichi
Kobayashi Isao
Tokuda Koji
(Kobe Steel, Ltd.)
King Roy
McGuthry-Banks Tima M
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
LandOfFree
Production method of metal iron does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production method of metal iron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production method of metal iron will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4051290