Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1989-12-22
1991-11-12
Straub, Gary P.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
423651, 75490, 75451, C21B 1302, C21B 1314
Patent
active
050644670
ABSTRACT:
A process for the direct reduction of iron-containing metal oxides to obtain iron is disclosed in which a reformed reduction gas rich in H.sub.2 and CO and having an oxidation degree in the range of from about 0.30 to about 0.35 is formed and reduction is carried out simultaneously in a single reaction zone of a reduction reactor. The reformed reduction gas is formed using a highly endothermic reaction during which a mixture of heated natural gas, recycled top gas and air, preferably oxygen enriched air, is placed into contact with heated surfaces of DRI metallized iron in the reaction zone. The resulting reformed reducing gas consists essentially of from about 45% to about 48% hydrogen, from about 32% to about 34% carbon monoxide, from about 2% to about 4% carbon dioxide, from about 1% to about 3% methane, from about 14% to about 16% nitrogen and from about 1% to about 3% water vapor.
REFERENCES:
patent: Re32247 (1986-09-01), Stephens, Jr.
patent: 3210180 (1965-10-01), Jukkola
patent: 3303017 (1967-02-01), Mayer et al.
patent: 3364011 (1968-01-01), Porter et al.
patent: 3375098 (1968-03-01), Marshall
patent: 3562780 (1971-02-01), Eisenberg
patent: 3635456 (1972-01-01), Anthes et al.
patent: 3936296 (1976-02-01), Campbell
patent: 3985547 (1976-10-01), Iacotti et al.
patent: 4045214 (1977-08-01), Wetzel et al.
patent: 4046557 (1977-09-01), Beggs
patent: 4253867 (1981-03-01), Price-Falcon et al.
patent: 4261734 (1981-04-01), Price-Falcon et al.
patent: 4425159 (1984-01-01), Nixon
patent: 4528030 (1985-07-01), Vera et al.
patent: 4566904 (1986-01-01), Von Bogdandy et al.
patent: 4668284 (1987-05-01), Vera et al.
patent: 4880458 (1989-11-01), Martinez-Vera et al.
patent: 4940488 (1990-07-01), Maeda et al.
patent: 4946498 (1990-08-01), Weber
Bueno C. Henry R.
Dam G. Oscar G.
C.V.G. Siderurgica Del Orinoco, C.A.
Straub Gary P.
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