Leaching of low-grade chalcopyrite ore using Persian Gulf water
Volume Title: 1
University of Tehran
Water supply is becoming an increasingly important aspect of hydrometallurgical operations due to the water deficiency in arid regions. The consumption of fresh water in heap leaching of copper ores can be significantly reduced by adoption of the processes that can incorporate the salt water. In this research, the incorporation of the sulfate-chloride solutions in treatment of low-grade chalcopyrite ores at ambient temperature were investigated. Bottle roll leaching tests were performed to study the adoption of seawater at Sarcheshmeh copper mine. In this regard, the effect of the chloride ions on the dissolution behavior of copper, iron, manganese, and magnesium was studied. Results were shown that increasing the chloride concentrate can increase the dissolution of copper and reduce the acid consumption. Increasing the chloride concentration from 0 to 40 g/L, was shown to improve the recovery of copper from 10 to 20%. The dissolution rate of other impurities was however improved, consequently.