Aim of the Operation: Leaching of Raw Slime to produce de-copperiszed (leached) Slime containing less than 0.5% copper by oxidation process. 30% Cu (Raw slime) + Oxygen + Sulphuric Acid = CuSO4 (Leached electrolyte ) + 0.5%Cu( leached slime) Raw Slime: Slime generated during Copper electrorefining process having Copper 25-35%.