Enhancing the effectiveness of copper and cyanide recovery in gold cyanidation: A new integrated membrane process

Estay, Humberto; Ruby‒Figueroa, René; Quilaqueo, Michelle; Seriche, Gabriel; Cortés, Ignacio; Gim-Krumm, Minghai; Barros, Lorena

doi:10.1016/j.hydromet.2021.105606

Cited by 9 publications

(22 citation statements)

References 17 publications

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“…Our research group has published different studies related to the application of Equation ( 8) in cyanide solutions for recovering copper and zinc [49,50] or just copper [51][52][53][54]. The successful application of the SART process at an industrial scale is an excellent referent for the scaling-up of the metal sulfide precipitation process for other matrices or applications.…”

Section: Leachates Solutions From Ores and Tailingsmentioning

confidence: 99%

“…Recent applications of membrane filtration processes, specifically microfiltration (MF), to clarify copper sulfide precipitates produced in cyanide media [53] and AMD [20] have been reported (Figure 9). Furthermore, a mix of copper and zinc sulfide from a real cyanide solution of a gold mine was processed by MF [50]. Using feed pressure of slurries slower than 2 bar, flux values of 0.1 to 1.4 L/m 2 s were reached for copper sulfide and Cu/Zn sulfides in cyanide media [50,53] and 0.1 L/m 2 s for copper sulfide in AMD [20].…”

Section: Latest Breakthroughs In Solid-liquid Separationmentioning

confidence: 99%

“…Furthermore, a mix of copper and zinc sulfide from a real cyanide solution of a gold mine was processed by MF [50]. Using feed pressure of slurries slower than 2 bar, flux values of 0.1 to 1.4 L/m 2 s were reached for copper sulfide and Cu/Zn sulfides in cyanide media [50,53] and 0.1 L/m 2 s for copper sulfide in AMD [20]. The lowest flux for cyanide media was reached for a low copper concentration (200 mg/L) or under the presence of Zn, a fact that in both cases can be explained by the small particle size generated in the reactor.…”

Section: Latest Breakthroughs In Solid-liquid Separationmentioning

confidence: 99%

“…These flux results meant a reduction in the residence time from 60-90 min to less than 5 s with respect to conventional gravitational clarifiers [53]. Consequently, there was also a reduction of 90% of equipment volume and around 30% of capex compared to conventional processes [50]. In the case of cyanide solutions, the use of membrane filtration processes also minimizes the emanations of HCN to the environment.…”

Section: Latest Breakthroughs In Solid-liquid Separationmentioning

confidence: 99%

“…have been reported (Figure 9). Furthermore, a mix of copper and zinc sulfide from a real cyanide solution of a gold mine was processed by MF [50]. Using feed pressure of slurries slower than 2 bar, flux values of 0.1 to 1.4 L/m 2 s were reached for copper sulfide and Cu/Zn sulfides in cyanide media [50,53] and 0.1 L/m 2 s for copper sulfide in AMD [20].…”

Section: Latest Breakthroughs In Solid-liquid Separationmentioning

confidence: 99%

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Metal Sulfide Precipitation: Recent Breakthroughs and Future Outlooks

2021

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The interest in metal sulfide precipitation has recently increased given its capacity to efficiently recover several metals and metalloids from different aqueous sources, including wastewaters and hydrometallurgical solutions. This article reviews recent studies about metal sulfide precipitation, considering that the most relevant review article on the topic was published in 2010. Thus, our review emphasizes and focuses on the overall process and its main unit operations. This study follows the flow diagram definition, discussing the recent progress in the application of this process on different aqueous matrices to recover/remove diverse metals/metalloids from them, in addition to kinetic reaction and reactor types, different sulfide sources, precipitate behavior, improvements in solid–liquid separation, and future perspectives. The features included in this review are: operational conditions in terms of pH and Eh to perform a selective recovery of different metals contained in an aqueous source, the aggregation/colloidal behavior of precipitates, new materials for controlling sulfide release, and novel solid–liquid separation processes based on membrane filtration. It is therefore relevant that the direct production of nanoparticles (Nps) from this method could potentially become a future research approach with important implications on unit operations, which could possibly expand to several applications.

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