METHOD OF PROCESSING CARBIDE WASTE ORIGINATED FROM SOLID ALLOYS Russian patent published in 1998 - IPC

Abstract RU 2110590 C1

FIELD: alloy technology. SUBSTANCE: method consists in selective electrochemical dissolution of waste in acidic media to transfer tungsten into insoluble precipitate and cobalt into solution. Electrolysis is carried out at 20-25 C using reversible alternate industrial-frequency current. As electrolyte, 5-6 M nitric acid is utilized. Using reversible current enables performing virtually complete oxidation of tungsten carbide into tungstic acid and eliminates negative effects associated with anode polarization and electrode passivation. In addition, electrolysis procedure is considerably simplified. EFFECT: enhanced process efficiency. 4 tbl

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RU 2 110 590 C1

Authors

Palant A.A.

Levin A.M.

Brjukvin V.A.

Dates

1998-05-10—Published

1996-07-11—Filed