Recovery of Silver and Gold from Copper Anode Slimes

Chen, Ailiang; Peng, Zhiwei; Hwang, Jiann Yang; Ma, Yuehui; Liu, Xuheng; Chen, Xingyu

doi:10.1007/s11837-014-1114-9

Cited by 42 publications

(13 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After pyrolysis, the gold of spent slag with initial enrichment should be enriched and recovered further. At present, the recovery of gold from electronic scraps can be done in two main approaches: pyro-metallurgical processing and hydrometallurgical processing. , Hydrometallurgical is the mainstream method because of the following positive effects: no dust or low dust generation; low energy consumption; high recovery rate; and easy working conditions. Cyganowski et al have studied a method of recovering gold from the aqua regia leachate of electronic parts using a core–shell-type anion exchange resin and found that the investigated resins revealed great selectivity toward gold.…”

Section: Introductionmentioning

confidence: 99%

Valuable Resource Recovery from Waste Tuning Fork Crystal Resonators via an Integrated and Environmentally Friendly Technique: Pyrolysis of Organics and Chlorination Leaching–Extraction–Reduction of Gold

Lü

2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Waste tuning fork crystal resonators (WTFCRs), as essential components of electronic products, are resource-rich but hazardous, demanding to be safely recycled and disposed to promote sustainable utilization of the resources and environmental protection. However, the recycling technology for WTFCTs has not attracted enough attention and has been poorly developed up to now. According to the structure characteristics of metal and nonmetal distribution in WTFCRs, this study presents an efficient and promising technology, including mechanical separation, vacuum pyrolysis, selective chlorination leaching, extraction, and reduction for recovering Au and disposing organics from WTFCRs. First, mechanical separation is done to expose organics and gold, recycling metals of 91.16% Fe and 98.75% Al simultaneously. Next, vacuum pyrolysis is proposed to destroy the organics structure so as to enrich the gold, and 84.63% organics are converted into oil as potential resource. Next, selective chlorination leaching, extraction, and reduction are employed to recover gold. The results show that sponge gold is obtained with a recovery rate of 88.61% and a purity of 98.54% via the optimal condition. This study has proposed an efficient and sustainable approach for recycling WTFCRs. It has not only alleviated the pressure of environmental pollution, but also promoted the reuse of effective energy. What is more, it lays a foundation for the sustainable utilization of electronic components and provides a reference for further research and potential applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Valuable Resource Recovery from Waste Tuning Fork Crystal Resonators via an Integrated and Environmentally Friendly Technique: Pyrolysis of Organics and Chlorination Leaching–Extraction–Reduction of Gold

Lü

2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Since the nature of the slimes can vary from one refinery to another, CAS as a secondary source may have a complex chemical composition and physical morphology. Therefore, the applied method to recover the precious metals can be changed, depending on their chemical and morphological structures in the sources [10].…”

Section: Introductionmentioning

confidence: 99%

“…According to recent reviews [10,11] on the recovery of gold from secondary sources and conventional CAS, gold recovery from primary or secondary sources is mainly based on a cyanide process, which is very dangerous for the environment due to the high toxicity levels. In view of the environmental effects to substitute the cyanide for gold recovery, alternative leach chemicals have been sought for a long time.…”

Section: Introductionmentioning

confidence: 99%

Optimization of gold recovery from copper anode slime by acidic ionic liquid

Rüşen

Topçu

2017

Korean J. Chem. Eng.

View full text Add to dashboard Cite

Hydrometallurgical gold recovery from primary or secondary sources is mainly based on a cyanide process, which is very dangerous for the environment due to the high toxicity levels. In view of the environmental effect, the present study proposes a new green solvent called 1-ethyl-3-methyl-imidazolium hydrogen sulfate (EmimHSO 4) ionic liquid (IL) to recover gold from copper anode slime (CAS). The optimum leaching conditions for maximizing gold recovery were determined by orthogonal array (OA) of Taguchi' s experimental design method. OA L 16 (4 4) including four parameters with four levels each, was used to examine the effects of IL concentration (20%, 40%, 60%, 80% v/v), temperature (25, 50, 75, 95 o C), time (½, 1, 2, 4 h) and solid/liquid ratio (1/10, 1/15, 1/20, 1/25 g/mL) on leaching efficiency of the gold recovery. Statistical analysis of variance (ANOVA) was used to determine the relevance between experimental conditions and gold recovery. The selective leaching tests results showed that gold recovery up to 89.07% was attained on laboratory scale under the optimum leach conditions: 80% IL concentration, 75 o C, 4 h and 1/25 g/mL solid/liquid ratio. According to these results, EmimHSO 4 IL provides a very good ambiance for the oxidative leaching of gold and can be offered as an alternative leaching agent instead of harmful cyanide-based solvents.

show abstract

“…A number of studies have been specifically devoted to the recovery of gold from copper anode slimes using halide-based hydrometallurgical processes. Anode slime is produced during the electrorefining of impure copper anodes to produce pure copper cathodes. , The insoluble impurities of the copper anodes are collected at the bottom of the electrolysis cell as a slime. Depending on the production process of the copper anodes, the slime contains copper, nickel, tin, antimony, selenium, tellurium, gold, silver, platinum group metals, lead, iron, and barium.…”

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Gold(III) with Diethyl Carbonate

Raiguel

Gijsemans

Bossche

et al. 2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Diethyl carbonate (DEC) was evaluated as a green, renewable alternative to methyl isobutyl ketone and dibutyl carbitol for the recovery of gold from copper-rich sources, such as anode slimes, by solvent extraction from chloride solutions. DEC is a powerful extractant at high chloride concentrations and can be used to sequester and concentrate gold from large volumes of dilute aqueous solutions containing high concentrations of copper. Stripping can be performed using pure water. Different variables were investigated: DEC concentration, chloride concentration, chloride source, phase volume ratio, and equilibration time. The selectivity and phase disengagement times were studied, and possible mechanisms of extraction are discussed and evaluated. In addition, the stability of DEC against hydrolysis was measured.

show abstract

Recovery of Silver and Gold from Copper Anode Slimes

Cited by 42 publications

References 32 publications

Valuable Resource Recovery from Waste Tuning Fork Crystal Resonators via an Integrated and Environmentally Friendly Technique: Pyrolysis of Organics and Chlorination Leaching–Extraction–Reduction of Gold

Valuable Resource Recovery from Waste Tuning Fork Crystal Resonators via an Integrated and Environmentally Friendly Technique: Pyrolysis of Organics and Chlorination Leaching–Extraction–Reduction of Gold

Optimization of gold recovery from copper anode slime by acidic ionic liquid

Solvent Extraction of Gold(III) with Diethyl Carbonate

Contact Info

Product

Resources

About