Improving of copper extraction from chalcopyrite by using NaCl

Abstract

The addition of NaCl in the ammonium persulfate-APS (as an oxidant) leaching was investigated. APS has some advantages compared with conventional oxidants and its standard redox potential (E°) is 2.0 V. Effect of six parameters such as NaCl concentration, APS concentration, temperature, time, liquid–solid ration (L/S), and stirring speed on the leaching behavior was studied. Results showed that metals extraction increased with increasing of NaCl concentration, APS concentration, leaching temperature (up to 333 K), and L/S ratio. During oxidative leaching of sulfide minerals, the occurrence of elemental sulfur layer on particle surface is known as primary problem that causes low metal extraction. According to the results, the passivation effect of sulfur layer and low dissolution problems can be eliminated in the presence of chloride ions. Copper and iron extraction yields were obtained as 75% and 80%, respectively under leaching conditions as follows: APS concentration 250 g/L; NaCl concentration 150 g/L; time 180 min; temperature 333 K; stirring speed 400 r/min; and L/S 250 mL/g.

Keywords

copper / chalcopyrite / oxidation / leaching / dissolution

References

[1] HiroyoshiN, HirotaM, HirajimaT, TsunekawaM. A case of ferrous sulfate addition enhancing chalcopyrite leaching [J]. Hydrometallurgy, 1997, 47: 37-45

[2] ArbiterN, McnultyT. Ammonia leaching of copper sulfide concentrates [C]. Copper 99-Proceedings of the Fourth International Conference Phoenix Arizona, 1999197212

[3] BalazP. Mechanical activation in hydrometallurgy [J]. International Journal of Mineral Processing, 2003, 72: 341-354

[4] AgnewC J, WelhamN J. Oxidation of chalcopyrite by extended milling [J]. International Journal of Mineral Processing, 2005, 77: 208-216

[5] HarahshehM A, KingmanS, HarahshehA A. Ferric chloride leaching of chalcopyrite: Synergetic effect of CuCl2 [J]. Hydrometallurgy, 2008, 91: 89-97

[6] PadİllaR, RodríguezG, RuİzM C. Copper and arsenic dissolution from chalcopyrite–enargite concentrate by sulfidation and pressure leaching in H2SO4–O2 [J]. Hydrometallurgy, 2010, 100: 152-156

[7] BafghİM S H, EmamİA H, ZakerİA. Effect of specific surface area of a mechanically activated chalcopyrite on its rate of leaching in sulfuric acid-ferric sulfate media [J]. Metallurgical and Materials Transaction B, 2013, 44(5): 1166-1172

[8] LuZ Y, JeffreyM I, LawsonF. The effect of chloride ions on the dissolution of chalcopyrite in acidic solutions [J]. Hydrometallurgy, 2000, 56: 189-202

[9] HiroyoshiN, MikiH, HirajimaT, TsunekawaM. Enhancement of chalcopyrite leaching by ferrous ions in acidic ferric sulfate solutions [J]. Hydrometallurgy, 2001, 60: 185-197

[10] DreisingerD, AbedN. A fundamental study of the reductive leaching of chalcopyrite using metallic iron part: kinetic analysis [J]. Hydrometallurgy, 2002, 66: 37-57

[11] HanK N, MengX. Recovery of copper from its sulphides and other sources using halogen reagents and oxidants [J]. Minerals & Metallurgical Processing, 2003, 20: 160-164

[12] HİroyoshİN, KuroİwaS, MİkİH, TsunekawaM, HİrajİmaT. Effects of coexisting metal ions on the redox potential dependence of chalcopyrite leaching in sulfuric acid solutions [J]. Hydrometallurgy, 2007, 87: 1-10

[13] HiroyoshiN, KitagawaH, TsunekawaM. Effect of solution composition on the optimum redox potential for chalcopyrite leaching in sulfuric acid solutions [J]. Hydrometallurgy, 2008, 91: 144-149

[14] SokİćM D, MarkovİćB, ŽİvkovİćD. Kinetics of chalcopyrite leaching by sodium nitrate in sulphuric acid [J]. Hydrometallurgy, 2009, 95: 273-279

[15] BjorlingG, FaldtI, LindgrenE, ToromanovI. A nitric acid route in combination with solvent extraction for hydrometallurgical treatment of chalcopyrite [C]. Extractive Metallurgy of Copper, 19762USA, New York, AIME: 725737

[16] Sarvesware RaoK, RayHS. A new look at characterisation and oxidative ammonia leaching behaviour of multimetal sulphides [J]. Minerals Engineering, 1998, 11: 1011-1024

[17] FengD, VAN DeverterJ S J. Leaching behavior of sulphides in ammoniacal thiosulfate systems [J]. Hydrometallurgy, 2002, 63: 189-200

[18] TkacovaK, BalazP. Reactivity of mechanically activated chalcopyrite [J]. International Journal of Mineral Processing, 1996, 44: 197-208

[19] MauriceD, HawkJ A. Ferric chloride leaching of mechanically activated chalcopyrite [J]. Hydrometallurgy, 1998, 49: 103-123

[20] AchİmovİcovM, BalazP, BrİancİnJ. The influence of mechanical activation of chalcopyrite on the selective leaching of copper by sulphuric acid [J]. Metalurgija, 2006, 45: 9-12

[21] BafghİM S, EmamİA H, ZakerİlA, KhakİJ V. Effect of mechanical activation on the kinetics of leaching of chalcopyrite in the ferric sulfate media [J]. Iranian Journal of Materials Science & Engineering, 2010, 7: 30-35

[22] AkçilA. A preliminary research on acid pressure leaching of pyritic copper ore in Kure copper mine Turkey [J]. Minerals Engineering, 2002, 15: 1193-1197

[23] BrewerR E. Copper concentrate pressure leaching-plant scale-up from continuous laboratory testing [C]. SME Annual Meeting, 200416

[24] DreİsİngerD. Copper leaching from primary sulfides: Options for biological and chemical extraction of copper [J]. Hydrometallurgy, 2006, 83: 10-20

[25] WodkaJ, ChmİelewskİT, ZİolkowskİB. Pressure leaching of shale ore in oxygenated sulphuric acid [J]. Physicochemical Problems of Mineral Processing, 2007, 41: 349-364

[26] TshİlomboK G, BafubİandİA F M. Ammonia/nitric acid leaching of copper-cobalt oxidized ore [C]. International Conference on Mining, Mineral Processing and Metallurgical Engineering, 2013, South Africa, ICMMME'2013: 120122

[27] DaltonR F, DíazG, PrİceR, ZunkelA D. The cuprex metal extraction process recovering copper from sulfide ores: Recovering copper from sulphide ores [J]. JOM, 1991, 43(8): 51-56

[28] BarrG, DefreyneJ, JonesD, MooreRThe CESL process- successful refinery of a low grade copper concentrates [M], 2000

[29] HyvarİnenO, HamalaİnenM, LeİmalaR. Outokumpu hydrocopper process—A novel concept in copper production [C]. Chloride Metallurgy 2002: Practice and Theory of Chloride/metal Interaction, 32nd Annual Hydrometallurgy Meeting. Montreal, Quebec, Canada, Metallurgical Society, CIM, 2002712713

[30] MoyesJ, HoullİsF. Intec base metal processes—releasing the potential of chloride metallurgy technical update and commercialization status [C]. Chloride Metallurgy 2002: Practice and Theory of Chloride/metal Interaction, 32nd Annual Hydrometallurgy Meeting, 2002

[31] LundströmM, AromaJ, ForsenO, HyvarİnenO, BarkerM H. Leaching of chalcopyrite in cupric chloride solution [J]. Hydrometallurgy, 2005, 7: 89-95

[32] SkrobİanM, HavlİkT, UkasİkM. Effect of NaCl concentration and particle size on chalcopyrite leaching in cupric chloride solution [J]. Hydrometallurgy, 2005, 77: 109-114

[33] HerrerosO, VİnalsJ. Leaching of sulfide copper ore in a NaCl-H2SO4-O2 media with acid pre-treatment [J]. Hydrometallurgy, 2007, 89: 260-268

[34] NİcolM, MİkİH, YévenesL V. The dissolution of chalcopyrite in chloride solutions Part 3. Mechanisms [J]. Hydrometallurgy, 2010, 103: 86-95

[35] YévenesL V, NİcolM, MİkİH. The dissolution of chalcopyrite in chloride solutions Part 1. The effect of solution potential [J]. Hydrometallurgy, 2010, 103: 108-113

[36] YévenesL V, MİkİH, NİcolM. The dissolution of chalcopyrite in chloride solutions Part 2: Effect of various parameters on the rate [J]. Hydrometallurgy, 2010, 103: 80-85

[37] GuoZ-h, PanF-k, XiaoX-y, ZhangL, JiangK-qi. Optimization of brine leaching of metals from hydrometallurgical residue [J]. Transaction of Nonferrous Metals Society of China, 2010, 20: 2000-2005

[38] MİkİH, NİcolM. The dissolution of chalcopyrite in chloride solutions. IV. The kinetics of the auto-oxidation of copper(I) [J]. Hydrometallurgy, 2011, 105: 246-250

[39] RuİzM C, MontesK S, PadİllaR. Chalcopyrite leaching in sulfate–chloride media at ambient pressure [J]. Hydrometallurgy, 2011, 109: 37-42

[40] JacksonEHydrometallurgicall extraction and reclamation [M], 1986, New York, Ellis Harwood Ltd, USA

[41] MellorJ WA Comprehensive treatise on inorganic and theoretical chemistry [M], 1960, London, Lowe and Brydone Printers Ltd, Great Britain

[42] BaharNAn investigation on persulphate leaching of chalcopyrite concentrate [D], 2004, Elazığ, Fırat University

[43] TuranM DInvestigation of the pressure leaching of chalcopyrite in the presence of active oxidizing [D], 2010, Elazığ, Fırat University

[44] BabuM N, SahuK K, PandeyB D. Zinc recovery from sphalerite concentrate by direct oxidative leaching with ammonium, sodium and potassium persulfates [J]. Hydrometallurgy, 2002, 64: 119-129

[45] DakuboF, BaygentsJ C, FarrellJ. Peroxidisulfate assisted leaching of chalcopyrite [J]. Hydrometallurgy, 2012, 121: 68-73

[46] VogelA IVogel’s textbook of quantitative chemical analysis [M], 19895London, Great Britain, John Wiley & Sons Inc.

[47] HacklR P, DreisingerD B, PetersE, KingJ A. Passivation of chalcopyrite during oxidative leaching in sulfate media [J]. Hydrometallurgy, 1995, 39: 25-48

[48] KoleiniS M J, AghazadehV, SandströmA. Acidic sulphate leaching of chalcopyrite concentrates in presence of pyrite [J]. Minerals Engineering, 2011, 24: 381-386

[49] BonanM, DemartheJ M, RenonH, BaratİnF. Chalcopyrite leaching by CuCl₂ in strong NaCl solutions [J]. Metall. Trans., 1981, 12B: 269-274