Leaching of chalcopyrite with acidified ferric chloride and carbon tetrachloride addition Minerals Engineering, Vol. 8, No. 10, pp. 1125 1134, 1995 Pergamon 0892 68759500077 1 LEACHING OF CHALCOPYRITE WITH ACIDIFIED FERRIC AND CARBON T
Mechanical activation was employed during the leaching mechanochemical leaching of chalcopyrite concentrates in a sulfuric acid medium at room temperature and atmospheric pressure.
of high temperature pressure oxidation to process chalcopyrite concentrates. Secondary copper sulphide minerals such as chalcocite Cu. 2. S or covellite CuS, although not as abundant as chalcopyrite, represent a non negligible source of copper. The enrichment zone of porphyry copper deposits e.g. Morenci, or the sulphidic zones of Central
Abstract While bioleaching of pyrite concentrates has been successfully used in industry to liberate gold from the sulfide matrix for subsequent cyanidation, the same technology cannot bemended for leaching chalcopyrite concentrates for copper recovery. It will be shown to be uneconomical andpete with pressure leaching technology.
The treatment of chalcopyrite concentrates with nitrogen species catalyzed oxidative pressure leaching. Corby G. Anderson The Center for Advanced Mineral and
Chalcopyrite Concentrate Pressure Leaching Options Chalcopyrite Concentrate Leaching Electro Winning Flotation Primary Crushing Stockpile Leaching Oxide Chalcocite Sec/Tert Crushing Customers Electro Winning Potential to provide additional full cost benefits of up to $0.05/lb copper over high temperature process i.e. $0.10 0.15/lb total benefit 28 October 25th, 2004 Concentrate
Chalcopyrite leaching rate in atmospheric pressure and in sulfate media with ferric ion is low because of passive layer formation around chalcopyrite particles. In this investigation pyrite is used as a catalyst of chalcopyrite leaching. Because of galvanic interaction between chalcopyrite and pyrite, the chalcopyrite leaching rate is increased.
At high temperature pressure leaching conditions, the formation of sulphuric acid from sulphides in the ore is favoured, however at medium and low temperature conditions 150165oC and 140oC, respectively elemental sulphur formation occurs. At these temperatures, the elemental sulphur is molten and causes issues in further leaching. A high yield of elemental sulphur reduces the oxygen
The process is jointly owned by MIMand Highlands Pacific, and was originally developed for the Frieda River Project in PNG. It uses fine grinding to reduce the feed size to about 16 18 microns, then ferric sulphate leaching at about 80C and atmospheric pressure, with oxygen or air sparging. Copper recovery is by conventional SX/EW.
Optimisation of Circuits for Pressure Leaching of Sulfide Ores and Concentrates Fadeela SaloojeeandFrank K. Crundwell CM Solutions, Johannesburg, South Africa Corresponding author: [email protected] Pressure leaching is an option for copper recovery from chalcopyrite. Leaching takes place at high temperatures and pressures in the presence of an oxidising agent. This
Alternative hydrometal lurgical routes to treating chalcopyrite are therefore required. One option is pressure leaching, which is the focus of this work. In the pressure leaching process, sulphide ores and concentrates are leached in autoclaves at temperatures of 200 to 220°C and a pressure of about 3000 kPa Schlesinger et al., 2011.
To be successful in leaching chalcopyrite atT <119oC requires avoidance of passivationof chalcopyrite by copper polysulfide To be successful in leaching of chalcopyrite at150oCin presence of elemental sulfur requires process conditions thatprevent liquid sulfur occlusionof unreacted sulfides and avoidance of passivation due to presence of copper polysulfide layer.
15/05/2018· The results of chalcopyrite concentrate processing using low temperature and high temperature sulfuric acid pressure leaching are presented. A material of theposition was used, 21.5 Cu, 0.1 Zn, 0.05 Pb, 0.04 Ni, 26.59 S, 24.52 Fe, 16.28 SiO 2 in wt. . The influence of technological parameters on the degree of copper and iron extraction into the leach
According to previous studies , such concentrates can be effectively treated using pressure oxidative leaching POX. At temperature of 190200 °C, partial oxygen pressure 46 bar and = 1530 g / L during 100 120 min about 98 Cu was extracted.
Journal of Biomimetics, Biomaterials and Biomedical Engineering Materials Science. Defect and Diffusion Forum
LEACHING OF COPPER CONCENTRATES by ROBERT FRANCIS SHANTZ A Thesis Submitted to the Faculty of the DEPARTMENT OF METALLURGICAL ENGINEERING In Partial Fulfillment of the Requirements For the Degree of MASTER OF SCIENCE WITH A MAJOR IN METALLURGY In the Graduate College THE UNIVERSITY OF ARIZONA 19 7 2. STATEMENT BY AUTHOR This thesis
The direct leaching of chalcopyrite flotation con centrates and the subsequent solvent extraction electrowinning processes of copper cannotpete with the smelt ing of the same concentrates for concentrates that meet smelter quality specifications and where existing smelting capacity is available.
Autoclave oxidative leaching is one of the most promising hydrometallurgical approaches for copper suplhide materials processing. In previous studies , the possibility of an efficient autoclave treatment of chalcopyrite concentrate was confirmed.
Electrochemical studies on the leaching of chalcopyrite in mixed sulfatechloride media by Lu et al. indicated that the presence of chloride enhanced chalcopyrite oxidation. Redox potential is a key variable due to the existence of a potential range where the chalcopyrite is not passive.
Barta, L.A., Buban, K.R., Stiksma, J., and Collins, M.J., 1999, Pressure leaching of chalcopyrite concentrates by Dynatec, Proceedings of COPPER 99 COBRE 99 International Conference, Volume IV Hydrometallurgy of Copper, S.K. Young, D.B. Dreising, R.P. Hackl and D.G. Dixon, eds., The Minerals, Metals and Materials Society, pp. 167180.
Leaching of Copper concentrates Pressure Leaching of Chalcopyrite Concentrates by Dynatec The treatment of Arsenical Materials in the Pressure Leaching of Copper Concentrates at Dynatec Pilot Plant Pressure Oxidation of Codelco Copper Concentrate
Chalcopyrite Concentrate Pressure Leaching Options Chalcopyrite Concentrate Leaching Electro Winning Flotation Primary Crushing Stockpile Leaching Oxide Chalcocite Sec/Tert Crushing Customers Electro Winning Potential to provide additional full cost benefits of up to $0.05/lb copper over high temperature process i.e. $0.10 0.15/lb total benefit 28 October 25th, 2004 Concentrate
Developments are primarily related to leaching of high grade chalcocite pyrite ores and leaching of chalcopyrite concentrates Leaching of chalcopyriteplicated by passivation of chalcopyrite under mild conditions Most chalcopyrite leaching technologies try toe this passivation by one or more techniques This is the critical feature of the overall process
Manufacturing of nickel by hydrometallurgical technology at Harjavalta plant Finland had been caring out since 1960 by Outokumpu. Later on, the technology was modernized and currently Harjavalta plant belongs to PJSC MMC Nornickel. The plant is specializing on processing of copper nickel mattes, converter mattes and by products, originated from ldquoKola
Thermophilic Bioheap Leaching of Chalcopyrite Concentrates T.J. Harvey1*, N. Holder2, T. Stanek2 1 GeoBiotics, LLC, 12211 W. Alameda Pkwy, Suite 101, Lakewood, CO, 80228, USA 2 Lakefield Research Africa Pty Ltd, 58 Melvill Street, Booysens, Gauteng, 2091, South Africa Received 13 June 2002 accepted 15 October 2002 ABSTRACT
The Dynatec zinc pressure leach process was selected in 1989 for integration with the existing circuit for a refinery expansion, 5 and the zinc pressure leach plant was constructed and operated in the early 1990s. 6 Since all of the iron present in the zinc concentrates was to be converted to hematite, a high acid zinc pressure leach was . Pressure leaching las cruces copper ore SpringerLink
Mechanisms and rate limiting steps in bioleaching of sphalerite, chalcopyrite and pyrite with thiobacillus ferrooxidans, 2000. Pressure acid leaching of zinc and copper concentrates by Dynatec, Recent Experience with Zinc Pressure Leachinginco, 1987. Recovery of Zinc from Leach Residues Problems and Developments, 1999. Stoichemometric and
According to previous studies , such concentrates can be effectively treated using pressure oxidative leaching POX. At temperature of 190200 °C, partial oxygen pressure 46 bar and = 1530 g / L during 100 120 min about 98 Cu was extracted.
01/01/2012· The dynatec process involves oxidative leaching of chalcopyrite concentrate at 150 o C using coal at a modest dosage 25 kg/t of concentrate as an effective anti agglomerant Collins and Kofluk, 1998. Sulfide oxidation chemistry is similar to the CESL process. A high extraction of copper 98 is achieved by either recycling the unleached sulfide to the leach
FeS2+ H2O + 3.5O2 FeSO4+ H2SO4 Since all zinc concentrates contain iron, and the iron minerals are leached during pressure leaching, the behavior of iron is controlled by the acid content of the pressure leach solution. The pressure leach of zinc concentrate is normally designated
Pressure Leaching Of Chalcopyrite Concentrates By Dynatec. Countercurrent two stage pressure leachinghe first two stage zinc pressure leach plantmissioned in flin flon in the summer of 1993 this plant, employing dynatec zinc pressure leach technology, is operated by hudson bay mining andpany, ltd.
Chloride assisted pressure sulphate leaching of chalcopyrite Dynatec Process Pilot plant 150 1012 37 Pressure leaching of chalcopyrite using low grade coal as additive Mt. Gordonmercial 90 8 100 Pressure leaching of chalcocite/pyrite ore in FeIII solution Platsol Process Pilot plant 220230 3040 15
Abstract: This article presents a copper leaching process from chalcopyrite concentrates using a lowpressure reactor. The experiments were carried out in a 30 L batch reactor at an oxygen pressure of 1 kg/cm2 and solid concentration of 100 g/L.
Cu recoveries of 90 could be achieved during POX leaching of this chalcopyrite/chalcocite concentrate at 200oC and 0.7 MPa initial oxygen pressure within 2 h in a pressure reactor lined with titanium, which were 18 28 higher than for the same leaching using the teflon liner.
To be successful in leaching chalcopyrite atT <119oC requires avoidance of passivationof chalcopyrite by copper polysulfide To be successful in leaching of chalcopyrite at150oCin presence of elemental sulfur requires process conditions thatprevent liquid sulfur occlusionof unreacted sulfides and avoidance of passivation due to presence of copper polysulfide layer.
Thermophilic Bioheap Leaching of Chalcopyrite Concentrates T.J. Harvey1*, N. Holder2, T. Stanek2 1 GeoBiotics, LLC, 12211 W. Alameda Pkwy, Suite 101, Lakewood, CO, 80228, USA 2 Lakefield Research Africa Pty Ltd, 58 Melvill Street, Booysens, Gauteng, 2091, South Africa Received 13 June 2002 accepted 15 October 2002 ABSTRACT
:1 M at a moderate temperature 80120 °C. A high level of copper recovery 98 from bulk chalcopyrite concentrate was obtained under a total pressure of 6 atm at 120°C within 2 h when using small amounts of nitrite species due to their autocatalytic behavior in acidic solutions.
The race for success in the leaching of chalcopyrite concentrates, will continue to be a major focus this year. Pressure oxidation is making a strong move up the field, with Phelps Dodge continuing to run their successful demonstration plant in Arizona and looking atmercial applications at Cerro Verde in Peru and El Abra in Chile. Not to be outdone,inco have signed up
The rate of dissolution of a chalcopyrite concentrate was measured in ammoniacal solutions under oxygen pressure for conditions when chemical reaction rate controlled. Temperatures from 50䔟°C, oxygen pressures to 689 kPa and ammonia concentrations from 2.5 to 7.0 mol/ l
Significant advances have taken place in the treatment of refractory gold ores and concentrates during the past decade. In sulfide ores, pyrite is themon host mineral for gold. Studies by Gasparrini 1983 showed that gold occurs in pyrite as native gold or electrum in all sizes and forms. Arsenopyrite is probably the secondmon host for gold and forms similar associations