Two-stage fluid bed reduction of manganese nodules

Details Two-stage fluid bed reduction of manganese nodules Two-stage fluid bed reduction of manganese nodules

1974-08-26

1977-08-23

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 49, 423150, 423DIG4, 75 21, 75 26, 75 72, 75 80, 75 82, 75103, 75117, 75119, C01G 314, C01G 5312, C22B 518

Patent

active

040440940

ABSTRACT:
Process in which manganese nodules are treated to enable metal values to be recovered. Manganese ore nodules are treated in a two-stage fluid bed process to produce a leachable product. In the first stage, dried nodules are calcined using direct fuel injection under a neutral or slightly oxidizing atmosphere to remove about one-half of the oxygen content. Subsequently, in the second stage, the calcined nodules are reduced with synthesis gas to render the metal values leachable. The metal values such as copper and nickel are leached from the reduced nodules with an ammonia-ammonium carbonate leach solution.

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patent: 3753686 (1973-08-01), Wilder et al.
patent: 3860689 (1975-01-01), Sefton

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