Alternative Lixiviant for Copper Leaching from …

This study investigated leaching kinetics by alternative lixiviants for copper leaching from chalcopyrite (CuFeS2), the most abundant copper resource in the world. As a refractory sulfide mineral, chalcopyrite shows low copper extraction due to passivation on chalcopyrite surface. Also, decrease of copper grade with high portion chalcopyrite requires the alternative leaching …

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Recovery of copper from a surface altered chalcopyrite …

2014-2-25 · chalcopyrite under natural environmental conditions using percola-tion columns using bacterial film oxidation (BACFOX) bioreactor technology [4]. In addition, the optimal conditions for solvent extrac-tion (SX) and electrowinning (EW) of copper have also been estab-lished to recover pure cathode copper from the Cu-loaded bacterial lixiviant.

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GLYCINE AS A LIXIVIANT FOR THE LEACHING OF LOW …

2017-9-27 · have been reported to selectively leach copper over gold from a copper flotation concentrate, the leaching behaviour of individual copper minerals in alkaline glycine solutions has not been studied. Also, there are no publications on the leaching kinetics of any copper minerals in the alkaline glycine system. Low grade coppergold ores have not –

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Producing Copper Nature''s Way: Bioleaching

2022-5-3 · Nutrients are added. Copper concentrate is added to the reactor in an amount so as to provide a pregnant liquor containing 30-40 grams per liter (which is reduced to 20-25 grams per liter after washing the leach residue), for feed …

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Solvometallurgical process for extraction of copper from …

mental problems. Hydrometallurgy is an alternative method for copper extraction from chalcopyrite, which can be applied to low grade copper ores due to the lower operating costs.2 Many works have been reported for hydrometallurgical leaching of chalcopyrite. The most often used lixiviants are acidic chloride media, acidic sulfate media and basic

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Solvometallurgical process for extraction of copper from …

Leaching of chalcopyrite Leaching of copper from chalcopyrite was first studied with different solvents and oxidizing agents at 60 °C. The following organic solvents were used for chalcopyrite leaching: ethanol (EtOH), propylene glycol (PG) and ethylene glycol (EG) ().The solvent has a significant effect on the leaching efficiency of iron and copper, when the same concentration of …

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copper crushers in bioleaching

The reactions involved in the bioleaching of chalcopyrite and other copper sulphide minerals have been given by many workers including Barrett 1993 but are given here to emphasise the importance of acid demand in the initial phase of leaching chalcopyrite together with the potential for acid production or formation of elemental sulphur as ...

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Ore Sulphide Extraction

2022-7-28 · Specially treating copper sulfide ore by pressure leaching to get elemental S instead of H2SO4 acid Blizzard Ddos Attack June 28 Prior to the extraction of the metal from the ore, it is necessary to separate, the ore from the Activators and Depressants: Minerals similar in chemical composition, such as sulphides of copper 254, 9/73 company info ...

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Copper leaching from chalcopyrite concentrate by …

2019-9-26 · the leaching degree of copper was measured. Obtained data fit into the SOP model, proving that this mathematical model can be applied for theoretical modelling of copper leaching from the chalcopyrite concentrate. Such models can significantly accelerate the development of industrial scale leaching technologies.

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Selective precious metals leaching from a chalcopyrite …

2000-12-15 · An alternative non-cyanide lixiviant, namely sodium hypochlorite, has been used for the selective extraction of gold and silver from a copper concentrate. ... Sodium hypochlorite leaching of the as-received chalcopyrite concentrate was conducted at 25, 50 and 75 mL/L of NaOCl in a background of 25 g/L NaCl and 0.35 M HCl using 100 g of the ...

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Copper Leaching From Low Grade Copper Ores Using …

2019-1-1 · Copper Leaching From Low Grade Copper Ores Using Alternative Leaching Systems Export Citation × Citation (Style = APA) Wu, Jiajia ; Ahn, Junmo ; Lee, Jaeheon (2019). ... Glycine is a weaker lixiviant for both samples, the copper extractions were 36% and 4% respectively. INTRODUCTION Chalcopyrite is the most abundant copper sulfide mineral on ...

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Precious Metal recovery from waste printed circuit boards …

Birloaga et al. (2014) referred Few other leaching studies such as Cu(II)–NH3–(NH4)2SO4 to two chemical leaching systems for the base and precious metals (Koyama et al., 2006), KI/I2 and NaCl/hypochloride (Shibata and extraction from waste printed circuit boards (WPCBs); sulphuric Matsumoto, 1999) were carried out by several other ...

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Alternative Lixiviant for Copper Leaching from …

2018-8-19 · Therefore, several alternative lixiviants such as sulfurous acid and methanesulfonic acid (MSA, CH 3 SO 3 H) were studied for both chalcopyrite concentrate and low grade ore to investigate the leaching kinetics of these lixiviants. Sulfurous acid, which has low chemical potential below 500 mV versus Ag/AgCl, can be one of alternative lixiviants ...

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An Alternative Process for Leaching Chalcopyrite …

An alternative copper concentrate leaching process using sodium nitrate and sulfuric acid diluted in seawater followed by gas scrubbing to recover the sodium nitrate has been evaluated. The work involved leaching test carried out under various condition by varying temperature, leaching time, particle size, and concentrations of NaNO3 and H2SO4. The amount of copper extracted …

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Gold and copper leaching from gold-copper ores and …

Leaching Gold-copper ores and concentrates 1. Introduction To extract precious metals from gold-copper ores and concentrates, thepresence of copper minerals has detrimentaleffects ongold extrac-tion unless high cyanide should be added to keep CN:Cu molar ratio above 4. For every 1% of reactive copper present about 30 kg/t NaCN

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pper ore acid leaching plant cheap cameroon

Copper Ore Acid Leaching Plant Cheap Cameroon2021-8-20 Copper Ore Acid Leaching Plant Cheap Cameroon. ... This method is used to recover many different precious metals like copper lead zinc gold silver and nickel. ... This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly ...

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Kinetics of Chalcopyrite Leaching in Novel and Exotic …

2019-1-1 · The use of ionic liquids as a leaching agent for chalcopyrite has been extensively investigated in recent years. This system is based primarily on the use of the imidazolium molecule (C3H5N2), which is a planar 5-member ring structure. This lixiviant has been applied to the leaching of chalcopyrite in the form of pure mineral, concentrates, and ...

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leaching gold ore in lebanon

4.4 the effect of copper cyanide on gold leaching from oxide and sulphide ores 110 4.5 summary 114 chapters pregrobbing phenomena in the cyanidation of gold ores 116 5.1 objectives of this chapter 116 5.2 background information 116 5.3 pregrobbing behaviour by the ores at

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Copper leaching from chalcopyrite concentrates

2005-7-1 · Chalcopyrite (CuFeS2) is one of the most abundant copper-bearing minerals, which accounts for approximately 70 percent of the world''s known copper reserves. For more than 30 years, a significant number of processes have been developed to leach copper from chalcopyrite concentrates. These processes recover copper via hydrometallurgical leaching of the copper …

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Sustainable Use of Copper Resources:

My Research and Language Selection Sign into My Research Create My Research Account English; Help and support. Support Center Find answers to questions about products, access, use, setup, and administration.; Contact Us Have a …

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Chalcopyrite leaching in novel lixiviants

2022-2-1 · Effect of temperature on the extraction of copper from a chalcopyrite concentrate using 20% bmimHSO 4 in acid ferric sulfate (Whitehead et al., 2007). ... Alternative lixiviant for copper leaching from chalcopyrite concentrate. Proceed. Extract., 2018 (2018), pp. 1257-1265, 10.1007/978-3-319-95022-8_102.

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Gold leaching from copper concentrate using alternative …

Copper concentrate from an active mine was received for direct gold leaching study. The main copper sulphide mineral was mainly chalcopyrite and small amount of chalcocite. The particle size of the concentrate was analysed to be P80 30 m by particle size analyser. Gold recovery from cyanidation was 18%, 32%, and 32% using 1000 ppm, 3000 ppm, and 5000 ppm NaCN, …

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Process for the recovery of value metals from base metal ...

2004-9-28 · Process for the recovery of value metals from base metal sulfide ores,Process for the recovery of value metals from base metal sulfide ores,, ...

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LEACHING OF COPPER CONCENTRATES

2020-4-2 · copper oxides have been in common use for some time. Prior to the development of the Sherritt-Gordon process for nickel and cobalt in which copper is recovered as high grade copper sulfide, copper sulfides were economically recovered in a hydrometallurgical process only during the leaching of waste dumps. . Need for Hydrometallurgical Processes

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COPPER LEACHING FROM CHALCOPYRITE WITH AN …

2022-6-11 · 7 Abstract For this study Methanesulfonic acid (MSA) and hydrogen peroxide (H 2O2) were used to leach chalcopyrite. Tests were conducted at …

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Investigating the Leaching Behavior of Copper from …

Also, the higher dissolution rates of copper from chalcopyrite can be because of the formation of copper-chloro complexes (Cu+, Cu2+ complexes Keywords:Copper leaching, Chalcopyrite concentrate, HydroCopper® process, Cupric chloride, D-optimal design (DOD). solid ratio of 6.8 mL/g, CuCl 2 concentration of 21.79 g/L and leaching time of ~8 h.

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Hydrometallurgical production of copper from flotation …

le document Hydrometallurgical production of copper from flotation concentrates de J. R. Cobble de type Livres imprimés Hydrometallurgical production of …

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A Comparative Kinetic Study of Chalcopyrite Leaching …

Two alternative oxidants, dichromate and nitrate, were studied for the copper dissolution from chalcopyrite, a refractory copper sulfide mineral. During chalcopyrite leaching tests, both oxidants achieved the copper extraction above 90% in 30 g/L methanesulfonic acid at 75 o C. The activation energies in dichromate and nitrate leaching systems ...

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Alternative Lixiviant for Copper Leaching from …

2018-1-1 · Alternative Lixiviant for Copper Leaching from Chalcopyrite Concentrate: Proceedings of the First Global Conference on Extractive Metallurgy January 2018 DOI: 10.1007/978-3 …

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(PDF) THE KINETICS OF THE DISSOLUTION OF …

THE KINETICS OF THE DISSOLUTION OF CHALCOPYRITE IN CHLORIDE MEDIA Lilian De Lourdes Velásquez Yévenes Metallurgical Engineer. Gustavo Quezada. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 37 Full PDFs related to this paper.

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Effect of Ultrasound on the Oxidative Copper Leaching …

2020-6-10 · The objective of this study is to compare the reaction kinetics of copper leaching from chalcopyrite in acidic ferric sulfate media with (UAL) and without (non-UAL) ultrasound assistance. Four leaching parameters were evaluated and optimized. The parameter with the strongest effect was temperature, followed by ultrasonic power, the solid-to-liquid ratio (S/L), and acid …

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Alternative Lixiviant for Copper Leaching from …

This study investigated leaching kinetics by alternative lixiviants for copper leaching from chalcopyrite (CuFeS2), the most abundant copper resource in the world. As a refractory sulfide mineral, chalcopyrite shows low copper extraction due to passivation on...

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Alkaline Glycine Systems as Alternatives Reagents for …

2020-12-11 · Use of glycine for Cu leaching in alkaline region Copper mineral in the concentrate before and after leaching in glycine solutions Copper extractions from Cu-Au concentrate after two-stages leaching : Stage 2 starts at zero time after stage 1. (Leaching conditions: two-stages, 0.3 M glycine, 1% peroxide, ambient, pH 11, 48 hours)

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Kinetic characteristics and mechanism of copper leaching …

2  · Assessing alternative pre-treatment methods to promote metal recovery in the leaching of printed circuit boards. Resour., Conserv. Recycl., 152 ... Kinetic study of copper leaching from chalcopyrite concentrate in alkaline glycine solution. Hydrometallurgy., 183 (2019), pp. 71-78.

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A Conceptual Process for Copper Extraction from …

2020-12-11 · extraction. The extraction of copper from ''''as-received" chalcopyrite flotation concentrate, at a particle size of 45 lm, in solutions containing 0.4 M glycine at 60 C with 25 ppm DO, was 40.1% after 24 h. If the chalcopyrite concentrate underwent an ultrafine grind to 10 lm with prior alkaline

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Full article: The Direct Leaching of Nickel Sulfide Flotation ...

2022-7-11 · The earliest published investigation into oxidative ammonia leaching of nickel concentrates after the development of the Sherritt–Gordon Process in 1955 was carried out by Totlani and Balachandra who studied ammonia pressure leaching of a copper-nickel concentrate containing 6.8% Ni and 4.5% Cu, copper being present as chalcopyrite (CuFeS 2 ...

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Kinetic study of copper leaching from chalcopyrite …

2019-1-1 · Chalcopyrite flotation concentrate was received from an operating copper mine in Southern Arizona. The elemental composition of the concentrate was analyzed using acid digestion followed by solution analysis for different metals using inductively coupled plasma optical emission spectrometry (ICP-OES) ().X-ray diffraction showed that the concentrate …

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Kinetic study of copper leaching from chalcopyrite ...

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(PDF) An Alternative Process for Leaching …

2020-4-17 · The amount of copper extracted from the chalcopyrite concentrate leached with seawater, 0.5 M of H2SO4 and 0.5 M of NaNO3 increased from 78% at room temperature to 91% at 45 °C in 96 h and 46 h ...

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Chalcopyrite Leaching

2017-5-5 · Leaching Chalcopyrite is the holy grail for hydrometallurgists (Leachers), difficult to leach as the sulfur forms a layer over the mineral and makes the leaching slow. Having said that, it is not not leachable, not …

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