Copper precipitation during leaching of various copper sulfide concentrates with cupric chloride in acidic solutions

Lundström, Mari; Liipo, Jussi; Taskinen, Pekka; Aromaa, Jari

doi:10.1016/j.hydromet.2016.10.017

Cited by 32 publications

(10 citation statements)

References 21 publications

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“…This reaction was first described for the Nikkelverk process [35,37], which aimed at the separation of copper and nickel ions. Later it was described in the work of Lundström et al [36].…”

Section: Introductionmentioning

confidence: 97%

“…In the works of Ke et al, and Lundström et al [35,36] a method was proposed for the selective leaching of As from copper-arsenic intermediates in the presence of Cu(II) ions, based on their exchange reaction with As ions. This reaction was first described for the Nikkelverk process [35,37], which aimed at the separation of copper and nickel ions.…”

Section: Introductionmentioning

confidence: 99%

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Leaching Kinetics of Arsenic Sulfide-Containing Materials by Copper Sulfate Solution

Karimov

Rogozhnikov

Shoppert

2019

Metals

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The overall decrease in the quality of mineral raw materials, combined with the use of arsenic-containing ores, results in large amounts of various intermediate products containing this highly toxic element. The use of hydrometallurgical technologies for these materials is complicated by the formation of multicomponent solutions and the difficulty of separating copper from arsenic. Previously, for the selective separation of As from copper–arsenic intermediates a leaching method in the presence of Cu(II) ions was proposed. This paper describes the investigation of the kinetics of arsenic sulfide-containing materials leaching by copper sulfate solution. The cakes after leaching of arsenic trisulfide with a solution of copper sulfate were described using methods such as X-ray diffraction spectrometry (XRD), X-ray fluorescence spectrometry (XRF), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy analysis (EDS). The effect of temperature (70–90 °C), the initial concentration of CuSO4 (0.23–0.28 M) and the time on the As recovery into the solution was studied. The process temperature has the greatest effect on the kinetics, while an increase in copper concentration from 0.23 to 0.28 M effects an increase in As transfer into solution from 93.2% to 97.8% for 120 min of leaching. However, the shrinking core model that best fits the kinetic data suggests that the process occurs by the intra-diffusion mode with the average activation energy of 44.9 kJ/mol. Using the time-to-a-given-fraction kinetics analysis, it was determined that the leaching mechanism does not change during the reaction. The semi-empirical expression describing the reaction rate under the studied conditions can be written as follows: 1/3ln(1 − X) + [(1 − X) − 1/3 − 1] = 4560000Cu3.61e−44900/RT t.

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“…This reaction was first described for the Nikkelverk process [35,37], which aimed at the separation of copper and nickel ions. Later it was described in the work of Lundström et al [36].…”

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Leaching Kinetics of Arsenic Sulfide-Containing Materials by Copper Sulfate Solution

Karimov

Rogozhnikov

Shoppert

2019

Metals

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“…It is associated with the derivation due to alteration from other minerals, such as chalcocite, chalcopyrite, bornite, and enargite [1]. Covellite appears in attractive proportion in the oxidized minerals; it is an intermediate product for the conversion of chalcopyrite [2] and participates in transforming digenite to covellite in oxygenated media [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Investigations such as those of Cheng and Lawson [23] and Miki et al [24] feature examples of synthetic covellite experiments (see Table 1). Meanwhile, other copper sulfide leaching investigations have been carried out with concentrates high in chalcopyrite, enargite, digenite, and chalcocite, among others, such as for example the investigations by Lundstrom [2], Ruiz [34], and Padilla [35]. The amount of associated impurities within the concentrate, such as clay elements, pyrite, and silicas, among other compounds, can affect the overall analysis of the tests, which makes the experiment very unique based on its conditions.…”

Section: Introductionmentioning

confidence: 99%

Statistical Study for Leaching of Covellite in a Chloride Media

Pérez

Toro

Saldaña

et al. 2020

Metals

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Covellite is a secondary copper sulfide, and it is not abundant. There are few investigations on this mineral in spite of it being formed during the leaching of chalcocite or digenite; the other investigations on covellite are with the use of mineraloids, copper concentrates, and synthetic covellite. The present investigation applied the surface optimization methodology using a central composite face design to evaluate the effect of leaching time, chloride concentration, and sulfuric acid concentration on the level of copper extraction from covellite (84.3% of purity). Copper is dissolved from a sample of pure covellite without the application of temperature or pressure; the importance of its purity is that the behavior of the parameters is analyzed, isolating the impurities that affect leaching. The chloride came from NaCl, and it was effectuated in a size range from –150 to +106 μm. An ANOVA indicated that the leaching time and chloride concentration have the most significant influence, while the copper extraction was independent of sulfuric acid concentration. The experimental data were described by a highly representative quadratic model obtained by linear regression (R2 = 0.99).

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“…The removal of metals including cobalt and copper ions from aqueous solutions, is performed using such methods as: precipitation (Lundström et al, 2016), electrochemical processes (Jack et al, 2014;Li et al, 2017) The choice of a water and wastewater treatment methods always depends on a number of parameters, including: the type and composition of wastewater, as well as the form and concentration of removed pollutants. The effectiveness of the selected method and economic considerations are also important.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Copper and Cobalt Ions Sorption from Aqueous Solutions on Selected Sorbents

Bożęcka¹,

Orlof-Naturalna²,

Korpalski³

2020

J. Ecol. Eng.

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In this paper, the sorption capacity of Norit SX2 activated carbon, ground rice husks and C-160 ion exchange resin in relation to the Cu 2+ and Co 2+ ions was compared. The studied sorption processes were described using the Langmuir adsorption model. The C-160 ion exchange resin was characterized by the highest affinity for both Cu 2+ and Co 2+ ions. It was shown that rice husk and active carbon are efficient sorbents in diluted solutions. The copper recovery for activated carbon, ion exchanger and rice husk was high. The efficiency of this process was 98.1%; 92.3% and 88.9%, respectively. Reducing the volume of acid used for regeneration allowed the solution to be concentrated and facilitated element recovery. Regeneration for cobalt occurred to a lesser extent.

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Copper precipitation during leaching of various copper sulfide concentrates with cupric chloride in acidic solutions

Cited by 32 publications

References 21 publications

Leaching Kinetics of Arsenic Sulfide-Containing Materials by Copper Sulfate Solution

Leaching Kinetics of Arsenic Sulfide-Containing Materials by Copper Sulfate Solution

Statistical Study for Leaching of Covellite in a Chloride Media

Comparison of Copper and Cobalt Ions Sorption from Aqueous Solutions on Selected Sorbents

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