Factors influencing the rate of dissolution of gold in ammoniacal solutions

International Journal of Mineral Processing

Volumn 58, Issue 1-4, 2000, Pages 369-381

  Han, K N ^a   Fuerstenau, M C ^b  

^a SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY   (United States)

^b UNIVERSITY OF NEVADA   (United States)

Author keywords

Ammoniacal solutions; Dissolution; Gold

Indexed keywords

AMMONIA; AMMONIUM COMPOUNDS; COMPOSITION EFFECTS; DISSOLUTION; ELECTROCHEMISTRY; EXTRACTION; OXIDATION; REACTION KINETICS; SALTS; THERMAL EFFECTS;

OXIDANTS;

GOLD ORE TREATMENT;

AMMONIA; ELECTROCHEMISTRY; EXTRACTION; GOLD; LEACHING;

EID: 0034008982     PISSN: 03017516     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0301-7516(99)00046-0     Document Type: Article

References (24)

1. Bhuntumkomol K., Han K.N. Kinetics of leaching metallic nickel powder in ammoniacal solutions. Trans. Inst. Min. Met., Sec. C. 91:1982;C1-C4.
2. Dasgupta R., Guan Y., Han K.N. The dissolution behavior of gold in ammoniacal solutions at 75°C. Met. Trans. B. 28 B:1996;5-12.
3. Grybos R., Samotus A. The dissolution of silver in oxygenated aqueous ammonia solution, I: Effect of oxygen and ammonia concentration. J. Less-Common Met. 84:1982;307-315.
4. Guan Y., Han K.N. The dissolution behavior of metals from silver/copper alloys in ammoniacal solutions. Miner. Metall. Process. 11:1994;12-19.
5. Guan Y., Han K.N. The electrochemical study on the dissolution behavior of gold in ammoniacal solutions at temperatures above 100°C. J. Electrochem. Soc. 143(6):1996;1875-1880.
6. Halpern J. Kinetics of the dissolution of copper in aqueous ammonia. J. Electrochem. Soc. 100(10):1953;421-428.
7. Han, K.N., 1999. Effective dissolution of gold, silver and pt-group metals using ammonia and halogen salts at low temperatures. US Patent (pending).
8. Han, K.N., Fuerstenau, M.C., 1997. Ammonia leaching of gold and gold-bearing ores. Proceedings of the XX International Mineral Processing Congress, pp. 367-379.
9. Han, K.N., Meng, X., 1992. Ammonia extraction of gold and silver from ores and other materials, US Patents, 5,114,687 May 19.
10. Han, K.N., Meng, X., 1994. Ammonia extraction of gold and silver from ores and other materials, US Patents, 5,308,381 May 3.
11. Haque K.E. Gold leaching from refractory ores. Literature survey. Min. Proc. Ext. Met. Rev. 2:1987;235-253.
12. Lichty, L., Ramadorai, G., Bhappu, R., Roman, R., 1990. In: Fuerstenau, M.C., Hendrix, J.I. (Eds.), Treatment of Refractory Ores and Concentrates - A Simplified Process. SME/AIME, p. 295.
13. Mason, P.G., 1990. Energy requirements for the pressure oxidation of gold bearing sulfides. J. Metals, Sept., 15-18, 1990.
14. Meng, X., 1991. The Leaching Behavior of Gold in Ammoniacal Solutions and its Practical Applications. Ph.D Dissertation, SDSM&T, Rapid City, SD, p. 228.
15. Meng, X., Han, K.N., 1993. The dissolution behavior of gold in ammoniacal solutions. In: Hiskey, J.B., Warren, G.W. (Eds.), Hydrometallurgy - Fundamentals, Technology and Innovation. SME, Littleton, CO, Printed by Cushing-Malloy, Ann Arbor, MI, pp. 205-221.
16. Meng, X., Han, K.N., 1994. Oxidation and extraction of refractory gold ores in ammoniacal solutions. Proceedings, Black Hills Fifth Western Regional Conference on Precious Metals, Coal and the Environment, pp. 71-82.
17. Palmer D.A., Lietzke M.H. The equilibria and kinetics of iodine hydrolysis. Radiochim. Acta. 31:1982;37-44.
18. Palmer D.A., Ramette R.W., Mesmer R.E. Triiodide ion formation equilibrium and activity coefficients in aqueous solutions. J. Solution Chem. 13:1984;673-683.
19. Peri, K., Guan, Y., Han, K.N., 1999. Dissolution behavior of gold in ammoniacal solutions with iodine as an oxidant, 128 SME/AIME Annual Meeting, Denver, CO, March 1-3, preprint 99-117.
20. Skibsted L.H., Bjerrum J., Gold complexes I. Robustness, stability, and acid dissociation of the tetramminegold (III) ion. Acta Chemica Scandinavica A. 28(7):1974;740-746.
21. Skibsted L.H., Bjerrum J. Gold complexes II. Equilibrium between gold(I) and Gold(III) in the ammonia system and the standard potentials of the couples involving gold, diamminegold(I), and tetramminegold(III). Acta Chemica Scandinavica A. 28(7):1974;764-770.
22. Skibsted, L.H., Bjerrum, J., 1974c. Studies on gold ammine formation stability and reactivity in aqueous solution. Proceedings of Int. Conf. Coord. Chem. 16th. R74, 2pp.
23. von Michaelis, H., 1989. Present and future of gold and silver metallurgy. In: Sastry, K.V.S., Fuerstenau, M.C. (Eds.), Challenges in Mineral Processing, SME/AIME, p. 767.
24. Vu C., Han K.N. Leaching behavior of cobalt in ammonia solutions. Trans. Inst. Min. Met., Sec. C. 86:1977;C119-C125.