Gold recovery from refractory gold concentrates by pressure oxidation pre-treatment and thiosulfate leaching

• Autorzy: Yu Li , Li Shimei , Liu Quanjun , Deng Jiushuai , Luo Bin , Liang Yuanqin , Zhao Liuchuang , Lai Hao

Identyfikatory

DOI

10.5277/ppmp18166

• Języki publikacji: EN

Abstrakty

EN

Naturally, refractory gold is enclosed by sulfide minerals such as pyrite and arsenopyrite and a higher content of organic carbon, which results in difficulty in the recovery of gold. In this study, the flotation gold concentrate before and after pressure oxidation (POX) was analyzed. The analysis of the Eh-pH diagram revealed that pyrite/arsenopyrite would be dissolved in higher oxidation potential. Results of SEM-EDS showed that the surface of minerals became very rough and structure of some particles was destroyed after POX. The XRD measurement showed that pyrite was oxidized to jarosite, and gangue minerals such as quartz and organic carbon were hardly changed. The process of thiosulfate leaching of gold was designed and optimized according to Miscellaneous implemented by Response Surface Methodology (RSM). Based on the results of ANOVA, leaching model was significant. In leaching, [S2O32-] played an important role and the interactions between [S2O32-] and [Cu2+] were significant. The effect of [HA] was relatively weak. Optimum process parameters of the initial reagent concentration were 505.00 mM for [S2O32-], 34.77 mM for [Cu2+], and 0.50 mM for [HA]. Under these conditions, the Au extraction value was about 86.21%, which was significantly higher than that obtained with leaching directly.

Słowa kluczowe

EN

gold; pressure oxidation; thiosulfate; leaching; RSM

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 2
• Strony: 537--551
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Yu Li

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

autor

Li Shimei

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

autor

Liu Quanjun

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

autor

Deng Jiushuai

• School of Chemical Engineering and Technology, China University of Mining & Technology (Beijing), Beijing 100083, China
• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

autor

Luo Bin

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

autor

Liang Yuanqin

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

autor

Zhao Liuchuang

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

autor

Lai Hao

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China

Bibliografia

• AAZAMI, M.; LAPIDUS, G.T.; AZADEH, A. 2014. The effect of solution parameters on the thiosulfate leaching of Zarshouran refractory gold ore. International Journal of Mineral Processing, 131: 43-50.
• AZIZI, A.; PETRE, C.F.; OLSEN, C.; LARACHI, F. 2010. Electrochemical behavior of gold cyanidation in the presence of a sulfide-rich industrial ore versus its major constitutive sulfide minerals. Hydrometallurgy, 1013-4: 108-119.
• CAMELINO, S.; RAO, J.; PADILLA, R.L.; LUCCI, R. 2015. Initial studies about gold leaching from printed circuit boards PCB's, of waste cell phones. Proc Mat Sci, 9: 105-112.
• CHAN, T., M. COLLINS, J. DENNETT, J. STIKSMA, J. JI, R. KALANCHEY, AND R. BEREZOWSKY. 2015. Pilot plant pressure oxidation of refractory gold-silver concentrate from Eldorado Gold Corporation's Certej Project in Romania. Can Metall Quart, 54: 252-260.
• CHEN, A.R.; WANG, S.X.; ZHANG, L.B.; PENG, J.H. 2015. Optimization of the microwave roasting extraction of palladium and rhodium from spent automobile catalysts using response surface analysis. International Journal of Mineral Processing, 143: 18-24.
• DONG, Z.; HAN, Y.; GAO, P. 2015, Research Status on Chemical Pre- oxidation for Carlin- type Gold Ore. METAL MINE, 12,: 92-97.
• ELORZA-RODRIGUEZ, E.; NAVA-ALONSO, F.; JARA, J.; LARA-VALENZUELA, C. 2006. Treatment of pyritic matrix gold-silver refractory ores by ozonization-cyanidation. Minerals Engineering, 191: 56-61.
• HA, V.H.; LEE, J.C.; HUYNH, T.H.; JEONG, J.; PANDEY, B.D. 2014. Optimizing the thiosulfate leaching of gold from printed circuit boards of discarded mobile phone. Hydrometallurgy, 149: 118-126.
• KARAMANEV, D.; MARGARITIS, A.; CHONG, N. 2001. The application of ore immobilization to the bioleaching of refractory gold concentrate. International Journal of Mineral Processing, 621-4: 231-241.
• KE, Y.; SHEN, C.; MIN, X.B.; SHI, M.Q.; CHAI, L.Y. 2017. Separation of Cu and As in Cu-As-containing filter cakes by Cu2+-assisted acid leaching. Hydrometallurgy, 172: 45-50.
• KHOSRAVI, R.; AZIZI, A.; GHAEDRAHMATI, R.; GUPTA, V.K.; AGARWAL, S. 2017. Adsorption of gold from cyanide leaching solution onto activated carbon originating from coconut shell-Optimization, kinetics and equilibrium studies. J Ind Eng Chem, 54: 464-471.
• LAMPINEN, M.; LAARI, A.; TURUNEN, I. 2015. Ammoniacal thiosulfate leaching of pressure oxidized sulfide gold concentrate with low reagent consumption. Hydrometallurgy, 151: 1-9.
• LEHMANN, M.N.; O'LEARY, S.; DUNN, J.G. 2000. An evaluation of pretreatments to increase gold recovery from a refractory ore containing arsenopyrite and pyrrhotite. Minerals Engineering, 131: 1-18.
• LINDSTROM, E.B.; SANDSTROM, A.; SUNDKVIST, J.E. 2003. A sequential two-step process using moderately and extremely thermophilic cultures for biooxidation of refractory gold concentrates. Hydrometallurgy, 711-2: 21-30.
• LUO, X.; LI, J.; ZHOU, W.; FENG, J.; MA, R. 2015. Research on the Dosage of Sodium Cyanide Used for Leaching Refractory Gold Ore after Pressure Oxidation Procedur. Precious Metals, 04: 51-55+62.
• LI, F.; DING, D.X.; HU, N.; PENG, Z.C.; CHEN, W. 2014. Roasting oxidation−thiosulfate leaching of gold from refractory gold-bearing sulfur concentrates. The Chinese Journal of Nonferrous Metals, 24,: 831-837.
• LI, J.; DABROWSKI, B.; MILLER, J.D.; ACAR, S.; DIETRICH, M.; LEVIER, K.M.; WAN, R.Y. 2006. The influence of pyrite pre-oxidation on gold recovery by cyanidation. Minerals Engineering, 199: 883-895.
• LI, Q.C.; LI, D.X.; QIAN, F.J. 2009. Pre-oxidation of high-sulfur and high-arsenic refractory gold concentrate by ozone and ferric ions in acidic media. Hydrometallurgy, 971-2: 61-66.
• LI, Y.L.; LI, D.X.; LI, J.B.; WANG, J.; HUSSAIN, A.; JI, H.; ZHAI, Y.J. 2015. Pretreatment of cyanided tailings by catalytic zonation with Mn2+/O-3. J Environ Sci-China, 28: 14-21.
• MOHAMMADI, E., POURABDOLI, M., GHOBEITI-HASAB, M., AND HEIDARPOUR, A. 2017. Ammoniacal thiosulfate leaching of refractory oxide gold ore. International Journal of Mineral Processing 164, 6-10.
• NUNAN, T.O.; VIANA, I.L.; PERXOTO, G.C.; ERNESTO, H.; VERSTER, D.M.; PEREIRA, J.H.; BONFATTI, J.M.; TEIXEIRA, L.A.C. 2017. Improvements in gold ore cyanidation by pre-oxidation with hydrogen peroxide. Minerals Engineering, 108: 67-70.
• SHEN, Z.H; ZHANG, Q.; MAO, S.; YE J.J. 2013. Leaching of micro-disseminated gold ore deposit in guizhou by thiosulfate. Mining And Metallurgical Engineering, 33-5,: 85-90.
• XU, B.; YANG, Y.B.; JIANG, T.; LI, Q.; ZHANG, X.; WANG, D. 2015. Improved thiosulfate leaching of a refractory gold concentrate calcine with additives. Hydrometallurgy, 152: 214-222.
• YAZICI, E.Y.; DEVECI, H. 2014. Ferric sulphate leaching of metals from waste printed circuit boards. International Journal of Mineral Processing, 133: 39-45.
• ZHU, P.; ZHANG, X.J.; LI, K.F.; QIAN, G.R.; ZHOU, M. 2012. Kinetics of leaching refractory gold ores by ultrasonic-assisted electro-chlorination. Int J Min Met Mater, 196,: 473-477.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).