FIELD: heavy metal hydrometallurgy, in particular nickel electrorefining.
SUBSTANCE: invention relates to method for compensation of nickel deficiency in electrolyte. Method includes anode dissolution of nickel anodes and anode residues in sulfuric acid-based electrolyte in electrolysis bath with anodes and anode nickel cathodes under reversible current, in electrolyte with origin sulfuric acid concentration of 80-200 g/l at temperature of 25-800C, wherein direct current density is 0.5-2.0 kA/m2, ratio of direct/reverse current density is 1.0-2.0; ratio of direct/reverse current passage time is 4-12; and reverse current passage time is ≤1 s.
EFFECT: improved bath capacity; decreased energy consumption; increased current density.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| TECHNOLOGY PROCESSING WASTE OF HARD ALLOYS | 2001 |
|
RU2189402C1 |
| METHOD OF ELECTROLYTIC REFINING OF COPPER | 2003 |
|
RU2233913C1 |
| METHOD OF PRODUCTION OF ELECTROLYTIC NICKEL | 2005 |
|
RU2303086C2 |
| PROCEDURE FOR PROCESSING SULPHIDE COPPER-NICKEL ALLOYS | 2010 |
|
RU2434065C1 |
| METHOD FOR ELECTROLYTIC REFINING OF COPPER AND NICKEL FROM COPPER/NICKEL ALLOYS | 2003 |
|
RU2237750C1 |
| METHOD OF ELECTROLYTIC REFINING OF COPPER IN BLOCK-SERIES OF BATHS OF BOX TYPE | 2006 |
|
RU2366763C2 |
| METHOD FOR PREPARING ELECTROLYTE FOR ELECTROLYTIC REFINING OF COPPER | 2004 |
|
RU2280106C2 |
| COPPER ELECTROLYTIC REFINING METHOD | 2017 |
|
RU2693576C2 |
| EXTRACTION METHOD OF NOBLE METALS FROM WASTES OF RADIO-ELECTRONIC INDUSTRY | 2007 |
|
RU2357012C1 |
| METHOD FOR PREPARING SOLUTION FOR ELECTROLYTIC REFINING OF NICKEL | 0 |
|
SU1121322A1 |
