Selective reduction of heavy metals

Details Selective reduction of heavy metals Selective reduction of heavy metals

1983-09-14

1984-12-11

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 11, C22B 400

Patent

active

044876289

ABSTRACT:
The present invention relates to selective reduction of heavy metals out of finely grained, substantially oxidic material by blowing the oxidic material into a furnace together with an amount of reducing agent required for obtaining desired selectivity while simultaneously heat energy is supplied by a gas heated in a plasma generator, the temperature being adjusted to such a level as to correspond to the oxygen potential at which the desired metals are transformed into a particular, isolatable phase as metal melt, metal vapor, speiss or matte and at which the remaining metals enter into a slag phase and can be isolated as slag melt.

REFERENCES:
patent: 3989512 (1976-11-01), Sayce
patent: 4061492 (1977-12-01), Fey
patent: 4072504 (1978-02-01), Perdahl
patent: 4310350 (1982-01-01), Santen

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