Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1998-10-02
2000-10-17
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75451, 75488, 75505, 266172, C21B 1302
Patent
active
061324892
ABSTRACT:
The present invention describes a method and apparatus for the reduction into metallic iron of iron-oxides-containing particles having a broad range of sizes. Particles, preferably within a broad range of sizes smaller than about 3.2 mm, are reduced by contact with a hot reducing gas, preferably mainly composed of hydrogen and within a temperature range of 700 to 750.degree. C. The reducing gas flows through a descending moving bed of coarser particles and forms an ascending fluidized bed of fines, all in a single reduction reactor, where the particles charged to the reactor are fed into the lower portion of the fluidized bed and the reduced fines are withdrawn from the reactor from the upper portion of the fluidized bed.
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Andrews Melvyn
Hylsa, S.A. De C.V.
S. Safford A. Thomas
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