Method for direct recovery of metal from metal-bearing ores

Details Method for direct recovery of metal from metal-bearing ores Method for direct recovery of metal from metal-bearing ores

1977-12-07

1979-12-18

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 26, 75 38, C22B 512, C21B 1302

Patent

active

041792840

ABSTRACT:
Iron, for example, is directly recovered from relatively fine-grained (having a grain particle size range of less than 250 microns), iron-bearing ore whereby carbon-containing materials and oxygen-containing materials are fed through a molten metal bath and converted into a CO/H.sub.2 -rich reduction gas which is sequentially passed upwardly at gas speeds of at least 1.5 m/sec. through downwardly moving ore particles within a reduction apparatus comprised of a sequence of interconnected cyclones so that ore particles in each cyclone are in a state of suspension and in intimate contact with the reduction gas and each other whereby extensive reduction of the ore particles occurs at each cyclone so that after a last cyclone the so-reduced ore particles are directly fed into a smelting means, from which liquid iron is recovered.

REFERENCES:
patent: 2973260 (1961-02-01), Nogiwa
patent: 3936296 (1976-02-01), Campbell
patent: 4008074 (1977-02-01), Rossner et al.

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