| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electrolytic refining method for bismuth with which, although high concentration of silver is contained as impurities in electrodeposited bismuth when bismuth is subjected to electrolytic refining in a chloride bath, high-purity bismuth is obtainable by suppressing an amount of contamination of the silver.SOLUTION: An electrolytic method for bismuth capable of obtaining high-purity bismuth includes adjusting hydrochloric acid concentration in an electrolyte to 75-100 g/L(b), and carrying out electrolytic refining at solution temperature of 20-25°C, a bath voltage of 0.2-0.4 V, and current density of 80-90 A/min the process in which bismuth anode having a relatively high silver content of 40-50000 wtPPM is subjected to electrolytic refining in a chloride bath.</p> |
