Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1990-05-18
1994-03-22
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75433, 75488, 406197, C21B 1300, C21B 1312
Patent
active
052960153
ABSTRACT:
In a method of producing iron and steel, from iron ores 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 the DRI in a closed pipe 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 is preferred as the 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. This is also applicable to pneumatic delivery of cold (or hot) ore to the reduction reactor.
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Becerra-Novoa Jorge O.
Flores-Verdugo Marco A.
Garza-Ondarza Jose J.
Viramontes-Brown Ricardo
Andrews Melvyn J.
Hylsa S.A. de C.V.
S. Safford A. Thomas
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