Pressure leaching of sulfidized chalcopyrite in sulfuric acid–oxygen media

Padilla, R.; Vega, Dany Fernández; Ruiz, M.C.

doi:10.1016/j.hydromet.2006.10.006

Cited by 75 publications

(11 citation statements)

References 6 publications

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“…Oxidizing agents like oxygen [23], chlorine [24], ferric [25], cupric [26], nitrate [27], and others are required to dissolve chalcopyrite. Some researchers have tested nitric acid [28,29], and nitrite [30] to leach chalcopyrite, with good results in terms of copper extraction.…”

Section: Introductionmentioning

confidence: 99%

Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment

et al. 2019

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This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted to evaluate different variables, namely the addition of nitrate as NaNO 3 (11.7 and 23.3 kg/ton), chloride as NaCl (2.1 and 19.8 kg/ton), curing time (20 and 30 days) and repose temperature (25 and 45 • C). The optimum copper extraction of 58.6% was achieved with the addition of 23.3 kg of NaNO 3 /ton, 19.8 kg of NaCl/ton, and after 30 days of curing at 45 • C. Under these pretreatment conditions, three samples of ore were leached in mini-columns. The studied parameters were temperature (25 and 45 • C) and chloride concentration (20 and 40 g/L). The optimum copper extraction of 63.9% was obtained in the mini-column leaching test at 25 • C, with the use of 20 g/L of chloride. A higher temperature (45 • C) and a higher chloride concentration (40 g/L) negatively affected the extraction. The pretreatment stage had favorable effects, in terms of accelerating copper dissolution and improving leaching of copper sulfide ore in acid-nitrate-chloride media. Waste salts from caliche industry and waste brine from reverse osmosis can be used for providing the nitrate and chloride media.

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Section: Introductionmentioning

confidence: 99%

Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment

et al. 2019

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“…At first, the lead in the primary form of sulfate in the residue was leached with sodium chloride in the medium of hydrochloric acid. As shown in the reaction (12), the lead was transferred into lixivium in the form of lead dichloride during the leaching, and the lead dichloride solid product was obtained by condensation and crystallization from the lixivium. The silver in the primary form of sulfide in the lead leach residue was again leached with thiourea, and equation (13) shows the leaching chemical reaction.…”

Section: Reclaiming Of Pb and Ag From Residuementioning

confidence: 99%

Oxygen pressure acid leaching of Gacun complex Cu concentrates

Zhong

Jiang

2012

J. Cent. South Univ. Technol.

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The treatment of the Gacun complex Cu concentrate with high contents of Pb, Zn, Ag, etc by oxygen pressure acid leaching was studied. It is unusual that tetrahedrite, whose treatment was rarely studied, is the primary copper mineral of the concentrates. Most of silver also occurs in the mineral. The optimum operating parameters of oxygen pressure acid leaching were established by conditional tests. Pilot scale test was carried out under the parameters, and the leaching rates of copper and zinc are as high as 97.10% and 89.83% while lead and silver are transformed into sulfate and sulfide respectively and stay in leaching residue. The copper and zinc in lixivium were reclaimed by extraction-electrowinning and purification-electrowinning, respectively, and the lead and silver in the residue were reclaimed separately by chloride leaching and thiourea leaching. The extraction rate of copper achieves 96%, and the leaching rates of lead and silver reach 90% and 95%, respectively.

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“…Desulfurization methods for high sulfur-containing bauxite have been intensively investigated over several decades, the proposed methods including flotation, roasting, and wet desulfurization, etc. [4][5][6]. In these methods, flotation desulfurization has been shown to be an effective method for the separation of sulfide minerals, which is widely used for the removal of pyrite [4].…”

Section: Introductionmentioning

confidence: 99%

An Insight into Flotation Chemistry of Pyrite with Isomeric Xanthates: A Combined Experimental and Computational Study

Han

Huang

et al. 2018

Minerals

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The flotation chemistry between pyrite and isomeric xanthates (butyl xanthate and isobutyl xanthate) was investigated by means of adsorption experiments, surface tension tests, and molecular dynamic simulations in this work. The flotation chemical results were confirmed and further interpreted by quantum chemical calculations. The experiment results demonstrated that the isobutyl xanthate exhibited superior adsorption capacity and surface activity than those of butyl xanthate in flotation chemistry. In addition, molecular dynamic simulations were simultaneously performed in constant number, constant volume and temperature (NVT), and constant number, constant volume, and pressure (NPT) ensemble, indicating that the NPT ensemble was more suitable to the flotation system and the isobutyl xanthate was easier to be adsorbed on pyrite surface compared with butyl xanthate during an appropriate range of concentrations. Furthermore, the quantum chemical calculations elucidated that the isobutyl xanthate presented higher reactivity than that of the corresponding butyl xanthate based on the frontier molecular orbital theory of chemical reactivity, which was consistent with experimental and simulation results obtained. This work can provide theoretical guidance for an in-depth study of the flotation chemistry of pyrite with isomeric xanthates.

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Pressure leaching of sulfidized chalcopyrite in sulfuric acid–oxygen media

Cited by 75 publications

References 6 publications

Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment

Accelerating Copper Leaching from Sulfide Ores in Acid-Nitrate-Chloride Media Using Agglomeration and Curing as Pretreatment

Oxygen pressure acid leaching of Gacun complex Cu concentrates

An Insight into Flotation Chemistry of Pyrite with Isomeric Xanthates: A Combined Experimental and Computational Study

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