OPTIMIZED PRECIPITATION CONDITIONS FOR SELENIUM FROM SAR-CHESHMEH COPPER ANODE SLIMES LEACHING SOLUTION

The precipitation process of selenium from Sar-Cheshmeh copper anode slimes leaching solution has been investigated here. The copper anode slimes are made up of those components of the anodes, which are not soluble in the electrolyte. They contain varying quantities of precious metals like gold, silver, selenium and tellurium. In this paper, some parameters affecting the precipitation conditions of selenium from anode slimes leaching solution by Na2SO3 were studied. The optimum conditions determined were T= 25-30 0C, acidity= 2 M, time= 15 minutes and the amount of Na2SO3= 6 times of selenium content in the solution. Under these conditions 99 % of selenium was precipitated and the purity of selenium was found 98.85%.

کلیدواژه ها:

copper anode slimes ، hydrometallurgy ، selenium