Abstract
The factors affecting the anodic processes in the electrowinning of chromium were investigated by carrying out electrolysis experiments with a chromium ammonium sulfate solution in a laboratory-scale cell of approximately 90 ml equipped with a diaphragm. The current density (838-1077 A m-2), temperature (50-70°C), and rate of electrolyte flow (5-18 ml/h) from catholyte to anolyte were varied to determine their effects on the anodic oxidation of Cr(III) to Cr(VI). There was no attempt to optimize the cathodic deposition process. The behavior of the traditional lead - silver anode with an effective surface area of 10 cm2 was compared with that of two commercially available dimensionally stable anodes. The current efficiency for the anodic oxidation of the chromic ion varied from about 75 to 100% with the lead - silver anode while it was only about 10 to 20% with the dimensionally stable anodes. The other variables had a much less significant effect.
| Original language | English |
|---|---|
| Pages (from-to) | 337-348 |
| Number of pages | 12 |
| Journal | Hydrometallurgy |
| Volume | 46 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Oct 1997 |
Funding
One of the authors (CA.) is grateful to the Ministry of National Education of Turkish Government for its financial support. This research has been supported by the Department of Interior’s Mineral Institutes Program administered by the Bureau of Mines under allotment grant number G1175 149-362 1.
| Funders | Funder number |
|---|---|
| Bureau of Mines | G1175 149-362 1 |
| Ministry of National Education of Turkish Government | |
| U.S. Department of the Interior |