Leaching behavior of gold in ammoniacal solutions in the presence of bromine as an oxidant

Proceedings of the Jan D. Miller Symposium - Innovations in Natural Resource Processing

Volumn 2005, Issue , 2005, Pages 261-280

  Kim, Peter Nam Soo ^a   Han, Kenneth N ^a  

^a South Dakota School of Mines and Technology   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GOLD POWDERS; OXIDANTS; RATE EXPRESSION;

AMMONIA; BROMINE; ELECTROCHEMISTRY; EXTRACTION; LEACHING; PH EFFECTS; POWDERS;

GOLD;

EID: 33745007711     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (26)

1. Aylmore, M.G. and Muir, D.M., 2001, Thermodynamic analysis of gold leaching by ammoniacal thiosulfate using Eh/pH and speciation diagrams," Min. and Metal. Proc. Vol. 18, pp. 221-227.
2. Breuer, P.L. and Jeffrey, M.I., 2004, The reduction of copper(II) and the oxidation of thiosulfate and oxysulfur anions in gold leaching solutions" Hydrometallugy, Vol. 70, pp. 163-173.
3. Bhuntumkomol, K., Han, K.N. and Lawson, F., 1980, Leaching behavior of metallic nickel in ammonia solutions, Trans. Inst. Min. Metall. Sect. C, pp. 7-13.
4. Chimenos, J.M., Segarra, M., Guzman, L., Karagueorguieva, A., and Espiell, F., 1996, Kinetics of the reacton of gold cyanidation in the presence of a thallium salt, Hydrometallurgy, Vol. 44, pp. 269-286.
5. Dasgupta, R., Guan, Y.C., and Han, K.N., 1997, "The electrochemical behavior of gold in ammoniacal solution at 75°C," Metall. Mater. Trans. B, Vol. 28, pp. 5-12.
6. Deschenes, G. and Ghali, E., 1988, "Leaching of gold from a chalcopyrite concentrate by thiourea," Hydrometallurgy, Vol. 20, pp. 179-202.
7. Grybos R. and Samotus A., 1984, Potential-pH diagram for the silver-water-ammonia-sulfuric acid system at elevated temarature," J. Less-Common Met. Vol. 98, No. 1, pp. 131-140.
8. Guan, Y. and Han, K.N., 1994, The dissolution behavior of silver in ammoniacal solutions with cupric ammine," J. of the Electrochemical Soc., Vol. 141, pp. 91-96.
9. Guan, Y.C. and Han, K.N., 1995, "An electrochemical study on the dissolution of copper and silver from silver copper alloys," J. Electrochem. Soc. Vol. 142, No. 6, pp. 1819-1824.
10. Guan, Y. and Han, K.N., 1996, "The electrochemical study on the dissolution behavior of gold in ammoniacal solutions at temperatures above 100°C" J. Electrochemical Soc., Vol. 141, No.6, pp. 1875-1880.
11. Halpern, J., Milants, H. and Wiles, D.R., 1959, "Kinetics of the solution of copper in oxygencontaining solutions of various chelating agents," J. Electrochem. Soc. Vol. 106, pp. 647-650.
12. Han, K.N., 2003, The interdisciplinary nature of hydrometallurgy," Met. Trans. B, Vol. 34, pp. 757-767.
13. Han, K.N. and Meng, X., 1992, "Extraction of Gold/silver from refractory ores using ammoniacal solutions," in proceedings of Randol gold Forum, Randol Intern., pp. 213-218.
14. Han, K.N. and Meng, X., 1992, 1994, "Ammonia extraction of gold and silver from ores and other materials," U. S. Patent No.5, 114,687, U.S. Patent No.5,308, 381.
15. Kirk, D.W., Foulkes, F.R., and Graydon, W. F., 1978, A study of anodic dissolution of gold in aqueous alkaline cyanide," J. Electrochemical Soc., Vol. 123, No. 9, pp. 1436-1443.
16. McArthur, J.W. and Forrest, R.W., 1889, "Process of obtaining gold and silver from ores," US Patents 403,202 and 418, 137.
17. McGrew, K.J. and Murphy, J.W., 1985, "Iodine leach for the dissolution of gold," US patent 4, 557, 759.
18. Meng, X. and Han, K.N., 1994, Pub. 1995, " Adsorption of gold from iodide solution by activated carbon," Trans. Soc. Min. Metall. Explor. Vol. 296, pp. 31-36.
19. Meng, X. and Han, K.N., 1997, The dissolution kinetics of gold in moderate aqueous potassium iodide solutions with oxygen under pressure," Miner. Metall. Proc., Vol. 14, pp. 1-9.
20. Morioka, S., Sawada, Y., Shimakage, K. and Tsui, C.K., 1967, "Ammonia pressure leaching of metallic copper and nickel powder," Tohoku Daigaku Senko Seiren Kenkyusho Iho, Vol. 23, No. 2, pp. 155-166.
21. Pourbaix, M., 1974,-Atlas of Electochemical Equilibria in Aqueous Solution, NACE, pp. 644.
22. Qi, P.H. and Hiskey, J.B., 1991, "Dissolution kinetics of gold in iodide solutions," Hydrometallurgy, Vol. 27, pp. 47-62.
23. Skibsted, L.H. and Bjerrum, J., 1974, "Gold complexes. I. Robustness, stability, and acid dissociation of the tetramminegold(III) ion," Acta Chem. Scand. Ser. A, Vol. 28, No. 7, pp. 740-746.
24. Skibsted, L.H. and Bjerrum, 1974, Gold complexes. II. Equilibrium between gold(I) and gold (III) in the ammonia system and the standard potentials of the couples involving gold, diammine gold(I) and tetramminegold(III)," Acta Chem. Scand. Ser. A, Vol. 28, No. 7, pp. 764-770.
25. Vu, C. and Han, K.N., 1977, Leaching behavior of cobalt in ammonia solutions," Trans. Instn. Min. Metall., Vol. 86, pp. 119-125.
26. Zipperian, D., Raghavan, S.,and Wilson, J.P., 1988, Gold and silver extraction by ammoniacal thiosulfate leaching from a rhyolite ore," Hydrometallurgy, Vol. 19, pp. 361-375.