THERMODYNAMIC AND STRUCTURAL CHEMISTRY DISCUSSIONS FOR OXIDATIVE LEACHING OF Cu－Ni SULPHIDE ORE UNDER ATMOSPHERIC PRESSURE
(1.Department of Materials and Applied Chemistry; National University of Defense Technology; Changsha 410073;
2.Instilute of Metallurgical Physico-chemistry; Central South University of Technology; Changsha)
2.Instilute of Metallurgical Physico-chemistry; Central South University of Technology; Changsha)
Abstract: HNO3 was calculated to have much more larger thermodynamical tendency to oxidate copper, nickel and iron sulphides than FeCI3. The frontline orbits theory also confirmed that NO3￣- reacted with nickel and iron sulphides more easily than Fes3+ . The results of leaching Cu-Ni sulphide ore with FeCI3 and HNO3 were theoretically interpreted.
Key words: Cu-Ni sulphide ore; leach; ferric chloride; nitric acid