Metal extraction from various chalcogenide minerals through...

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes

Reexamination Certificate

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C075S010670

Reexamination Certificate

active

07850759

ABSTRACT:
Multimode and single mode microwave energy is used to improve the extraction of metals from chalcogenide minerals. In one process microwave energy is used to comminute the mineral after which the mineral is reacted with acid in the presence of microwave energy. Following treatment the mineral is removed and the extracted metal is recovered from the acid. In another process chalcogenide minerals are exposed to the magnetic field maximum or the electrical field maximum of a single mode electromagnetic energy. This treatment causes a phase separation between metals and silicates within the mineral leaving metal rich regions from which the metal can be readily recovered by traditional methods.

REFERENCES:
patent: 5393320 (1995-02-01), Gomez
patent: 6350420 (2002-02-01), Duyvesteyn et al.
patent: 6365885 (2002-04-01), Roy et al.
patent: 2003/0029944 (2003-02-01), Flinn et al.
patent: 2004/0187643 (2004-09-01), Beckmann
patent: 2004/0258591 (2004-12-01), Birken
patent: WO-03/031664 (2003-04-01), None
patent: WO-03/046231 (2003-06-01), None

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