Iron carbide process

Details Iron carbide process Iron carbide process

1995-03-29

1997-11-25

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Process control responsive to sensed condition

75385, 75444, 75450, 423439, C22B 514

Patent

active

056907176

ABSTRACT:
A process for producing iron carbide in a fluid bed reactor in which the pressure may be maintained in excess of the pressure at which the mole fraction of hydrogen in the process gas begins to decrease. The hydrogen concentration is increased above the equilibrium concentration for hydrogen at the temperature and pressure in the reactor. Further improvements are gained by preheating a iron ore reactor feed in which the iron oxide is primarily in the form of hematite under a reducing atmosphere, and using at least two fluid bed reactors in series.

REFERENCES:
patent: Re32247 (1986-09-01), Stephens, Jr.
patent: 1775713 (1930-09-01), Bailey
patent: 1786386 (1930-12-01), Ashcroft
patent: 2535042 (1950-12-01), Cohn et al.
patent: 2538201 (1951-01-01), Kalbach et al.
patent: 2598393 (1952-05-01), Kulling et al.
patent: 2653088 (1953-09-01), Pike
patent: 2752234 (1956-06-01), Shipley
patent: 2780537 (1957-02-01), Stelling et al.
patent: 2806779 (1957-09-01), Case
patent: 2864688 (1958-12-01), Reed
patent: 2894831 (1959-07-01), Old et al.
patent: 2900246 (1959-08-01), Keith et al.
patent: 2921848 (1960-01-01), Agarwal
patent: 2978318 (1961-04-01), Kalling et al.
patent: 3021208 (1962-02-01), Feinman
patent: 3135598 (1964-06-01), Mizushima
patent: 3136624 (1964-06-01), Mader et al.
patent: 3140168 (1964-07-01), Halley et al.
patent: 3160498 (1964-12-01), Olt et al.
patent: 3288590 (1966-11-01), Keith et al.
patent: 3356488 (1967-12-01), Walsh
patent: 3364009 (1968-01-01), Kemmetmuller
patent: 3364010 (1968-01-01), Mayer et al.
patent: 3364011 (1968-01-01), Porter, Jr. et al.
patent: 3499755 (1970-03-01), Morris
patent: 3502461 (1970-03-01), Guttler et al.
patent: 3637368 (1972-01-01), Bessant
patent: 3719811 (1973-03-01), Munson
patent: 3761244 (1973-09-01), Hoffert
patent: 3765872 (1973-10-01), Celada et al.
patent: 3885023 (1975-05-01), Gray et al.
patent: 3928021 (1975-12-01), Matsubara et al.
patent: 4042376 (1977-08-01), Collin
patent: 4045214 (1977-08-01), Wetzel et al.
patent: 4053301 (1977-10-01), Stephens, Jr.
patent: 4073642 (1978-02-01), Collin et al.
patent: 4134907 (1979-01-01), Stephens, Jr.
patent: 4202534 (1980-05-01), Davis, Jr.
patent: 4224056 (1980-09-01), Tomizawa et al.
patent: 4257781 (1981-03-01), Sephens, Jr.
patent: 4360378 (1982-11-01), Lindstrom
patent: 4372755 (1983-02-01), Tolman et al.
patent: 4398945 (1983-08-01), Stephens, Jr.
patent: 4420332 (1983-12-01), Mori et al.
patent: 4539188 (1985-09-01), Hirsch et al.
patent: 4676824 (1987-06-01), Daradimos et al.
patent: 4688521 (1987-08-01), Korenberg
patent: 4781358 (1988-11-01), Langan
patent: 4806158 (1989-02-01), Hirsch et al.
patent: 4841884 (1989-06-01), Engstrom et al.
patent: 4946498 (1990-08-01), Weber
patent: 5073194 (1991-12-01), Stephens et al.
patent: 5082251 (1992-01-01), Whipp
patent: 5118479 (1992-06-01), Stephens, Jr. et al.
patent: 5137566 (1992-08-01), Stephens, Jr .et al.
patent: 5167932 (1992-12-01), Ruottu
patent: 5192486 (1993-03-01), Whipp
patent: 5366897 (1994-11-01), Hager et al.
patent: 5370727 (1994-12-01), Whipp
patent: 5382277 (1995-01-01), Rose
patent: 5386974 (1995-02-01), Hardie et al.
patent: 5387274 (1995-02-01), Dam G. et al.
patent: 5401295 (1995-03-01), Brotzmann
patent: 5431711 (1995-07-01), Meissner
patent: 5435831 (1995-07-01), Meissner
patent: 5445667 (1995-08-01), Malstrom
patent: 5527379 (1996-06-01), Hirsch et al.
Stelling, Oho, Carbon Monoxide Reduction of Iron ORE, Journal of Metals pp. 290-295 (1958).
Stephanopoulos, G., "Synthesis of Alternative Control Configurations for Multiple Input, Multiple Output Processed . . . ," Prentice Hall, Ing 1984, pp. 461-482.
Handa A et al. "Layer by Layer Analysis of the Chemical State of Iron In Carburized Steel Surfaces by Conversion . . ." pp. 1999-2002, 1981.
Ochlberg, R.J. et al. FIOR Process for Direct Reduction of Iron Ore pp. 58-60, 1974, Iron and Steel Engineer, vol. 51, No. 4. Apr.
Werther, J. et al. "MeBtechniken fur Gas/Feststoff-Wirbelschichtreaktoren" pp. 605-612, 1990, Chemie Ingenieur Technik vol. 62, No. 8, Aug. 2.

Affiliated with

Also associated with

Rating

Iron carbide process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Iron carbide process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iron carbide process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2103005