An eco-friendly and efficient process of low potential thiosulfate leaching-resin adsorption recovery for extracting gold from a roasted gold concentrate

Dong, Zhonglin; Jiang, Tao; Xu, Bin; Yang, Yongbin; Li, Qian

doi:10.1016/j.jclepro.2019.05.033

Cited by 78 publications

(28 citation statements)

References 37 publications

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“…However, the rate of repeated elution and reactivation reduces the activity of activated carbon, leading to the decreasing of the recovery of gold. 15 Resin 16,17 is also utilized as high-effective adsorbent to recover many metals. Although the resins present the merit of high loading capacity, fast adsorption rate, and low transparency of the solution, the selectivity for recycling Au is really low.…”

Section: Introductionmentioning

confidence: 99%

Highly selective enrichment of Au using enaminone covalent organic polymers (COP)

Zheng

Yang

et al. 2021

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Highly selective enrichment of Au using enaminone covalent organic polymers (COP)

Zheng

Yang

et al. 2021

RSC Adv.

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“…Zinc is currently the fourth most widely consumed metal in the world after iron, aluminum, and copper, and it has been widely used in automobile, machinery, battery, alloy, construction, shipping, and other industries [1,2]. Sphalerite (zinc sulfide, ZnS) is the primary mineral from which most of the world's zinc is produced [3].…”

Section: Introductionmentioning

confidence: 99%

Selective Flotation of Elemental Sulfur from Pressure Acid Leaching Residue of Zinc Sulfide

Liu

Jiang

Zhang³

et al. 2021

Minerals

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An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate. The process mineralogy analysis showed that the sulfur content reached 46.21%, and 81.97% of the sulfur existed as elemental sulfur which was the major mineral in the residue and primarily existed as pellet aggregate and biconical euhedral crystal. An elemental sulfur concentrate product with 99.9% of recovery and 83.46% of purity was obtained using the flotation process of one-time blank rougher, two-time agent-added roughers, and two-time cleaners with Z-200 as collector and Na2S + ZnSO4 + Na2SO3 as depressant. The flotation experiment using return water indicated that the cycle use of return water had no adverse effect on the flotation performance of elemental sulfur. The process mineralogy analysis manifested that main minerals in the residue directionally went into the flotation products. Most of elemental sulfur entered the concentrate while other minerals almost completely went into the tailing. Main valuable elements lead, zinc, and silver entered the tailing with sulfides and could be recovered by lead smelting. The proposed process can realize the comprehensive recovery of valuable components in the high-sulfur residue and thus it has wide industrial application prospect.

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“…The hydrometallurgy is a main method of gold extraction. The leaching process as an important part of hydrometallurgy can be classified into three species depending on the different leaching conditions: under acid phase (pH < 3) with chlorine, thiourea [1], ferric chloride, and thiocyanate [2]; under neutral phase (pH within 5-9) with halogens [3] and thiosulfate [4]; and under the alkaline phase (pH > 10) with cyanide [5], sodium sulfide, ammonia [6], ammonia-cyanide, nitriles, and sulfur. Among them, thiosulfate leaching is the most potential method of gold leaching due to the low toxicity and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Gold from Ore with Potassium Ferrocyanide Solution under UV Light

et al. 2021

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In this study, potassium ferrocyanide, a nontoxic cyanide precursor in dark and diffuse reflection environment, was applied as reagent for the leaching of gold. The free cyanide ions could gradually release from potassium ferrocyanide solution under the ultraviolet light. Orthogonal leaching experiments were performed in gold ore to analyze the effect of solution pH, potassium ferrocyanide dosage, and temperature in a potassium ferrocyanide solution system under UV light. Response surface methodology (RSM) was applied to explore the role of potassium ferrocyanide in gold leaching; optimized results showed that the gold recovery reached 67.74% in a high-alkaline environment at a 12.6 pH, 3.8 kg/t potassium ferrocyanide dosage, 62 °C, and irradiance of 10 mW·cm−2. The gold leaching kinetics were monitored by quartz crystal microbalance with dissipation (QCM-D) of potassium ferrocyanide solution. The results indicate that the gold extraction process could be divided into two stages: adsorption and leaching, and a rigid adsorption layer formed on the reaction surface. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis of the gold sensor surface after leaching reaction showed that –C≡N appears on the gold sensor surface, and the gold is oxidized to form AuCN complexes.

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An eco-friendly and efficient process of low potential thiosulfate leaching-resin adsorption recovery for extracting gold from a roasted gold concentrate

Cited by 78 publications

References 37 publications

Highly selective enrichment of Au using enaminone covalent organic polymers (COP)

Highly selective enrichment of Au using enaminone covalent organic polymers (COP)

Selective Flotation of Elemental Sulfur from Pressure Acid Leaching Residue of Zinc Sulfide

Recovery of Gold from Ore with Potassium Ferrocyanide Solution under UV Light

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