Method and apparatus for making metallic iron

Details Method and apparatus for making metallic iron Method and apparatus for making metallic iron

2011-05-10

2011-05-10

Wyszomierski, George (Department: 1733)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C075S771000

Reexamination Certificate

active

07938883

ABSTRACT:
A method of making metallic iron in which a compact, containing iron oxide such as iron ore or the like and a carbonaceous reductant such as coal or the like, is used as material, and the iron oxide is reduced through the application of heat, thereby making metallic iron. In the course of this reduction, a shell composed of metallic iron is generated and grown on the surface of the compact, and slag aggregates inside the shell. This reduction continues until substantially no iron oxide is present within the metallic iron shell. Subsequently, heating is further performed to melt the metallic iron and slag. Molten metallic iron and molten slag are separated one from the other, thereby obtaining metallic iron with a relatively high metallization ratio. Through the employment of an apparatus for making metallic iron of the present invention, the above-described method is efficiently carried out, and metallic iron having a high iron purity can be made continuously as well as productively not only from iron oxide having a high iron content but also from iron oxide having a relatively low iron content.

REFERENCES:
patent: 3033673 (1962-05-01), Coilin et al.
patent: 3443931 (1969-05-01), Ahrendt et al.
patent: 3607224 (1971-09-01), Blaskowski
patent: 3617256 (1971-11-01), Joseph et al.
patent: 3628947 (1971-12-01), DeVaney
patent: 3725032 (1973-04-01), Kihlstedt
patent: 3751241 (1973-08-01), Sloughfy et al.
patent: 3802865 (1974-04-01), Ohkubo et al.
patent: 3807986 (1974-04-01), Funk et al.
patent: 3814404 (1974-06-01), Claflin
patent: 3912501 (1975-10-01), De Castejon
patent: 3947621 (1976-03-01), Collin et al.
patent: 3953196 (1976-04-01), Obenchain
patent: 4254167 (1981-03-01), Sulzbacher et al.
patent: 4372779 (1983-02-01), Sugiyama et al.
patent: 4601752 (1986-07-01), Santen et al.
patent: 4701214 (1987-10-01), Kaneko et al.
patent: 5730775 (1998-03-01), Meissner et al.
patent: 5738694 (1998-04-01), Ford et al.
patent: 5810905 (1998-09-01), Shultz
patent: 6036744 (2000-03-01), Negami et al.
patent: 6063156 (2000-05-01), Negami et al.
patent: 6149709 (2000-11-01), Uragami et al.
patent: 6210462 (2001-04-01), Kikuchi et al.
patent: 6284018 (2001-09-01), Uragami et al.
patent: 6413295 (2002-07-01), Meissner et al.
patent: 6432533 (2002-08-01), Negami et al.
patent: 6506231 (2003-01-01), Negami et al.
patent: 6569223 (2003-05-01), Tanigaki et al.
patent: 6602320 (2003-08-01), Fuji et al.
patent: 6749664 (2004-06-01), Hoffman et al.
patent: 2002/0005089 (2002-01-01), Nagata et al.
patent: 1049266 (1979-02-01), None
patent: 1099516 (1981-04-01), None
patent: 25 14 325 (1975-10-01), None
patent: 1307112 (1963-02-01), None
patent: 1307575 (1963-02-01), None
patent: 1490774 (1967-11-01), None
patent: 196632 (1988-12-01), None
patent: 53 058 416 (1978-05-01), None
patent: 396368 (1974-01-01), None
United States Steel (U.S.S.). The Making, Shaping and Treating of Steel, 10th Edition, 1985, Association of Iron and Steel Engineers, pp. 400 and 510-511.
Narcin et al., Reduction of iron ore pellets with domestic lignite coal in a rotary tube fumace, int. J. Miner. Process. 43 (1995) 49-59.
U.S. Appl. No. 12/094,607, filed May 22, 2008, Uragami et al.
U.S. Appl. No. 09/478,410, filed date Jan. 6, 2000, Inaba et al.

Affiliated with

Also associated with

Rating

Method and apparatus for making metallic 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 Method and apparatus for making metallic iron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for making metallic iron will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2627567