Metallurgical apparatus – Means for treating ores or for extracting metals – By means applying heat to work – e.g. – furnace
Patent
1993-06-09
1995-08-29
Andrews, Melvyn
Metallurgical apparatus
Means for treating ores or for extracting metals
By means applying heat to work, e.g., furnace
266195, 266198, F27B 318, F27B 319
Patent
active
054453631
ABSTRACT:
In method and apparatus for producing iron and steel from iron cores largely composed of iron oxides, wherein a direct reduction process is used to produce a solid particulate intermediate product, generally known as sponge Iron or Direct Reduced Iron (DRI); pneumatically conveying large iron-bearing particles, such as pelletized iron ore or particularly DRI, in a closed transport pipe, eg. from the reduction reactor of the direct reduction process to the metallurgical furnaces where liquid iron or steel are produced, for example electric arc furnaces, induction furnaces, basic oxygen furnaces, etc. or to a briquetting press to form DRI briquettes, or simply to a silo or storage bin, or in general to a subsequent processing step for said DRI. When the carrier gas is recirculated for reuse, surprisingly air can be a preferred source of such gas, especially for reactive hot DRI. This method has a superior efficiency and productivity and reduces the overall energy consumption relative to currently used DRI steelmaking plants.
By using pneumatic conveyors, elements of the plant may be arranged side by side rather than one on top of the other, whereby the overall height of the plant may be reduced.
REFERENCES:
patent: 2103088 (1937-12-01), Mullen
patent: 2892698 (1959-06-01), Patterson
patent: 4437796 (1984-03-01), Ulveling et al.
patent: 5296015 (1994-03-01), Becerra-Novoa et al.
Becerra-Novoa Jorge O.
Flores-Verdugo Marco A.
Garza-Ondarza Jose J.
Viramontes-Brown Ricardo
Andrews Melvyn
Hylsa S.A. de C.V.
S. Safford A. Thomas
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