Determination of optimum silver leaching conditions of Sar-cheshmeh copper anode slimes by Taguchi method
|Location||21th symposium on geosciences|
|Holding Date||24 May 2008|
The copper anode slimes are made up of those components of the anode, which aren’t soluble in the electrolyte. They contain varying quantities of precious metals speciously silver (3.35%). They are being extracted as a by-product using hydrometallurgical method. The copper anode slimes were first leached with nitric acid at a various concentrations and temperature in which silver; selenium and tellurium were dissolved whereas gold and other impurities remain in the residue. The purpose of the research was to determine the effect of all parameters affecting the leaching and optimum conditions. Minimizing the number of experiments through the use of Taguchi method was obtained and optimum conditions were as follows:
Temperature: 100ْ C, Acid concentration: 4M, Time: 60 min. Under these conditions more than 98% of silver was recovered.
Keywords: Taguchi method-Silver- Copper anode slimes- leaching