Details

Autor(en) / Beteiligte

• Kuznetsova, O. G.
• Levin, A. M.
• Konushkin, S. V.
• Tsybin, O. I.
• Bol’shikh, A. O.

Titel

Electrochemical Processing of the Wastes of Heavy Tungsten Alloys in Ammonium Carbonate Solutions

Ist Teil von

• Russian metallurgy Metally, 2023, Vol.2023 (1), p.7-12

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2023

Quelle

2022 ECC(Springer)

Beschreibungen/Notizen

• The electrochemical behavior of tungsten and a VNZhK alloy (wt %: 90 W, 7.2 Ni, 1.8 Fe, 1 Co) in 0.5–1.5 M solutions of ammonium carbonate is studied by linear voltammetry in the potentiodynamic mode. An increase in the maximum anodic current density for the oxidation of tungsten and VNZhK alloy with the ammonium carbonate concentration is revealed. The electrochemical dissolution of the VNZhK alloy wastes in a 1.0 M solution of ammonium carbonate is studied by galvanostatic electrolysis and electrolysis using sinusoidal industrial-frequency alternating current. The advantage of a step-by-step application of direct and alternating currents is substantiated. For the processing of the VNZhK alloy wastes under the step-by-step action of direct and alternating currents, the transition of tungsten from the alloy to an ammonium carbonate solution is accompanied by concentrating the iron-group metals in a microdispersed electrolysis slime. A principal technological scheme is proposed for tungsten recovery from the wastes of heavy tungsten alloys to form ammonium paratungstate as the final product.