|About this Abstract
||Part C-2: Gordon Ritcey Symposium: Advances in Hydrometallurgical Solution Purification Separations
||Unique Hydrometallurgical Process for Copper-Anode Slime Treatment
at Saganoseki Smelter and Refinery
||Takahiro Furuzono, Atsushi Fujimoto, Tomohisa Takeuchi, Kazuaki Takebayashi
|On-Site Speaker (Planned)
Saganoseki Smelter and Refinery of Pan Pacific Copper Co., Ltd. started treating copper-anode slimes using a unique hydrometallurgical process in 1997.
Precious metals and rare metals in the copper-anode slimes are dissolved into an aqueous solution of hydrochloric acid by oxidation leaching, which is termed wet-chlorination. Gold is extracted efficiently from the chlorination liquor by dibutyl carbitol in the solvent-extraction stage. Gold is reduced by oxalic acid from gold-loaded dibutyl carbitol, and recovered as gold powder. The gold powder is cast directly into granules or ingots of more than 99.99% purity without electro-refining.
The plant was designed to process 132 tons of copper-anode slimes per month and has a current capacity of 200 tons per month as a result of several enhancements. Compared with a conventional process, the hydrometallurgical process provides some advantages, in particular, a higher product quality, a shorter gold-retention time, and a reduction in environmental load.
||Planned: At-meeting proceedings