The kinetic study of refractory silver ore in acidified potassium chloride - hypochlorite media

• Autorzy: Canıeren Ömer , Kurama Haldun , Karagüzel Cengiz

Identyfikatory

DOI

10.37190/ppmp/199374

• Języki publikacji: EN

Abstrakty

EN

In this study, the dissolution of refractory silver ore samples obtained from the Kütahya Gümüşköy region in the HCl/NaOCl and KCl system was investigated. Chemical and morphological analyzes of the sample show that the ore consists mainly of quartz, dolomite, barite and clay. Silver is dispersed as free fine particles or locked in barite and quartz minerals. The leaching tests were carried out under ambient conditions with direct contact of the solvent reagent with the sample. Reaction temperature, time, and KCl concentration were examined as leaching parameters to elucidate their effects on silver extraction. The results obtained in leaching tests indicated that the dissolution of silver occurs very quickly, almost linearly, within the first minute of the reaction. After this point, the dissolution rate decreases and reaches equilibrium after 10 minutes. It was found that increasing both temperature and KCl concentrations have a positive effect on extraction. These effects become more evident in the first stage, especially at high salt concentrations (1 M). The experimental results showed that the highest silver extraction of 53.15% was obtained under the following conditions: Temperature of 85oC, leaching time of 10 min, concentrations of 0.5 M and 0.1 M for KCl and NaOCl, respectively, the solid ratio of 30%, and particle size (d80) 15 μm. The kinetics of AgCl dissolution was specificially studied using aforementioned leaching system as well. The reaction rates, kinetic orders and activation energies were calculated. Correspondingly, a general kinetic model describing leaching systems based on shrinking core was proposed as a rate-controlling model for the dissolution mechanism.

Słowa kluczowe

EN

silver extraction; potassium chloride; sodium hypochlorite; dissolution kinetics; reaction order; activation energy

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2024
• Tom: Vol. 60, iss. 6
• Strony: art. no. 199374
• Opis fizyczny: Bibliogr. 32 poz., fot., tab., wykr.

Twórcy

autor

Canıeren Ömer

• Kütahya Dumlupınar University, Engineering Faculty, Mining Engineering Department, Kütahya, Türkiye

autor

Kurama Haldun

• Eskişehir Osmangazi University, Engineering and Architechture Faculty, Mining Engineering Department, Eskişehir, Türkiye

autor

Karagüzel Cengiz

• Kütahya Dumlupınar University, Engineering Faculty, Mining Engineering Department, Kütahya, Türkiye

Bibliografia

• ADAMS, M., D., 2005. Advances in gold ore processing. Elsevier. Edited by Mike D. Adams Editor - Mutis Liber PTY Ltd., Guildford, Western Australia, 15, 1-1027.
• AYLMORE, M.G., 2016. Alternative Lixiviants to Cyanide for Leaching Gold Ores, in Adams, M. (ed), Gold ore processing: Project development and operations. pp. 447-484. Amsterdam: Elsevier. ARIK, F., 2002. Geochemical modeling of the Gumuskoy (Kutahya) silver deposit. Dissertation, Selcuk University.
• BAGHALHA, M., 2007. Leaching of an oxide gold ore with chloride/hypochlorite solutions. Int. J. Miner. Process. 82, 178–186.
• BIGHAM, J. M., JONES, F. S., ÖZKAYA, B., SAHINKAYA, E., PUHAKKA, J. A., & TUOVINEN, O. H., 2010. Characterization of jarosites produced by chemical synthesis over a temperature gradient from 2 to 40 oC. Int. J. Miner. Process. 94(3-4), 121-128.
• BROWN, J.B., 1970. A chemical study of some synthetic potassium-hydronium jarosites. Can. Mineral. 10, 4, 696-703.
• CANIEREN, Ö., KARAGÜZEL, C., 2021. Silver Metal Extraction from Refractory Silver Ore Using Chloride-Hypochlorite and Hydrochloric Acid Media Under High Pressure. Min. Metall. Explor. 38, 1215-1223.
• DINÇER, H., 1997. Beneficiation of Gumuskoy silver plant tailings and increasing the plant recovery. Dissertation, Istanbul Technical University.
• DUOQIANG, L., JIKUN, W., YUNHUA, W., JIBO, J., FAN, W., 2008. Recovery of silver and zinc by acid pressure oxidative leaching of silver-bearing low-grade complex sulfide ores. Int. J. Miner. Process. 89(1-4), 60-64.
• GREAVES, J.N., PALMER, G.R., WHITE III W.W., 1990. The recovery of gold from refractory ores by the use of carbon-in-chlorine leaching. Minerals, 42 (9), 12-14.
• HABASHI, F., 1993. A textbook of hydrometallurgy. Metallurgie Extractive Quebec, Enr. GIX4E7.
• HARJANTO, S., PRATAMA, F.W, LAZUARDIYANI, A., TARIS, M., SALAM, M.Y., 2019. Additional of nacl on chloride leaching of gold ore from indonesian artisanal mining. IOP Conf. Series: Materials Science and Engineering, 515 012032 IOP Publishing.
• HASAB, M.G., RASHCHI, F., RAYGAN, S., 2013. Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate. Physicochem. Probl. Miner. Process. 49, 1, 61−70.
• HILSON, G., MONHEMIUS, A.J., 2006. Alternatives to cyanide in the gold mining industry: what prospects for the future? J. Clean. Prod. 14,1158-1167.
• LAMPINEN, M., SEISKO, S., FORSSTRÖM, O., LAARI, A., AROMAA, J., LUNDSTRÖM, M., KOIRANEN, T., 2017. Mechanism and kinetics of gold leaching by cupric chloride. Hydrometallurgy, 169, 103-111.
• LI, C., LI, H., YANG, X., WANG, S., ZHANG, L., 2016. Gold leaching from a refractory gold concentrate by the method of liquid chlorination. Rare Metal Technology, 71-77.
• LORIMER, W., 2010. Silver is Now Even More Precious Than Gold! Do You Own Any? Last modified May 26, 2010, Accessed January 24, 2024.
• MASILELA, M., NDLOVU, S., 2019. Extraction of Ag and Au from chloride electronic waste leach solutions using ionic liquids. J. Environ. Chem. Eng. 7, 1, 102810.
• MONNIN, C., and GALINIER, C. 1988. The solubility of celestite and barite in electrolyte solutions and natural waters at 25 C. A thermodynamic study. Chemical Geology, 71 ,4, 283-296.
• MURPHY, P. J., LAGRANGE, M.S., 1998. Raman spectroscopy of gold chloro-hydroxy speciation in fluids at ambient temperature and pressure: A re-evaluation of the effects of pH and chloride concentration. Geochim. Cosmochim. Acta. 62, (21-22), 3515–3526.
• NAM, K.S., HI, J.B., AN, J.W., HA, T. J., TRAN, T., KIM, M. J. 2008. Use of chloride-hypochlorite leachants to recover gold from tailing. Int. J. Miner. Process. 86, 131-40.
• OLTEANU, A.F., DOBRE, T., PANTURU, E., RADU, A.D., AKCIL, A. 2014. Experimental process analysis and mathematical modeling for selective gold leaching from slag through wet chlorination. Hydrometallurgy. 144-145, 170-185.
• OWUSU, C., MENSAH, S., ACKAH, K., AMANKWAH, R.K., 2021. Reducing preg-robbing in carbonaceous gold ores using passivative or blanking agents. Miner. Eng. 170, 15, 106990.
• ÖLMEZ, H., and YILMAZ, V.T., 2010. Inorganic chemistry. 5th ed. Türkiye: MKM Yayıncılık.
• PANGUM, L.S., and BROWNER, T.R.E., 1996. Pressure chloride leaching of a refractory gold ore. Miner. Eng. 9, 5, 547-556.
• PUVVADA, G.V.K., MURTHY, D.S.R., 2000. Selective precious metals leaching from a chalcopyrite concentrate using chloride/hypochlorite media. Hydrometallurgy. 58, 3, 185–191.
• RINNE, M., ELOMAA, H., SEISKO, S., LUNDSTROM, M., 2021. Direct cupric chloride leaching of gold from refractory sulfide ore: process simulation and life cycle assessment. Miner. Process. Extr. Metall. Rev. 43, 5, 598-609.
• SHON, H.Y,. WADSWORTH, M.E., 1979. Rate processes of extractive metallurgy. Plenum Press, NY
• SUNG, W., WANG, Q., CHEN, M., 2022. A review of Preg-robbing and the impact of chloride ions in the pressure oxidation of double refractory ores. Miner. Process. Extr. Metall. Rev. 43, 1, 69-96.
• YANTI, I., MARLIANA, T., ANUGRAHWATI, M., WICAKSONO, W.P., WINATA, W.F. 2023. The comparison of gold extraction methods from the rock using thiourea and thiosulfate. Open Chemistry, 21, 20230102.
• VIFIALS, J., NUNEZ, C., HERREROS, 0., 1995. Kinetics of the aqueous chlorination of gold in suspended particles. Hydrometallurgy. 38, 125-147.
• VAUGHAN, J.P., 2004. The process mineralogy of gold: the classification of ore types. Minerals. 56, 46-48.
• ZHEN-WU, B. Y., DIDERIKSEN, K., OLSSON, J., RAAHAUGE, P. J., STIPP, S. L. S., OELKERS, E. H., 2016. Experimental determination of barite dissolution and precipitation rates as a function of temperature and aqueous fluid composition. GCA. 194, 193-210.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).