| 摘要 |
<p>PURPOSE:To recover gold efficiently, safely and economically by dissolving gold from an article contg. gold by recovery liquid contg. KI or NaI and I2 and performing both recovery of gold and regeneration of the recovery liquid in an electrolytic cell having a diaphragm. CONSTITUTION:Gold is dissolved and removed from an object such as the gold- plated parts and gold ore by recovery liquid contg. KI or NaI and I2 in a recovery tank 10. This recovery liquid in which gold is dissolved and mixed is introduced into an electrolytic cell 12. The recovery liquid is electrolyzed in the negative electrode chamber of the electrolytic cell 12 having a diaphragm 18 and gold is electrodeposited and recovered on the negative electrode. The recovery liquid electrolyzed thereby is introduced into a positive electrode chamber 14 via the diaphragm 18. Therein the recovery liquid is electrolytically regenerated and returned to the recovery tank 10 and reutilized. Furthermore, the object from which gold is dissolved and removed is washed with water in the water washing tanks 24, 26 and thereafter recovered. This water washing liquid is treated in a concentrator and the obtained recovery liquid and water washing water are reutilized, respectively.</p> |
