Separation of arsenic and extraction of zinc and copper from high-arsenic copper smelting dusts by alkali leaching followed by sulfuric acid leaching

Zhang, Yuhui; Feng, Xiaoyan; Qian, Long; Luan, Jing; Jin, Bingjie

doi:10.1016/j.jece.2021.105997

Cited by 15 publications

(3 citation statements)

References 32 publications

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“…At the contact time of 20 min, 150 rpm, 10% (v/v) D2EHPA, 5% (v/v) Span 80, 1.5 M sulfuric acid in the internal phase, and Vex/ Vem=5:1; the maximum Zn extraction (≈71%) was achieved. The osmotic pressure gradient is the main factor responsible for water which is transported from the external phase into the internal phase and also emulsion swelling in most cases [8].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Zinc from Zinc Sublimber with Sulfuric, Thermal and Extraction Phosphoric Acid

Ramazonova,

Turaev,

Mamurov

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The study was conducted to extract zinc and the results on the extraction of Zn from zinc sublime with the solution of sulfuric, thermal and extraction phosphoric acids are presented depending on Solid: Liquid (S:L), concentration and duration of the leaching process. Sulfuric acid was used with a content of 8% which is a waste product of non-ferrous metallurgy, thermal phosphoric extraction phosphoric acid from phosphorites of the Central Kyzylkum. It has been established that the maximum degree of zinc extraction is noted when using extraction phosphoric acid, which is 96-98%, S:L=1:(10-15), with the temperature of 90°C and washing sulfuric acid, which is 99.8% at S:L=1:10 and above at room temperature. Increasing the duration of the process over 30 minutes has virtually no effect on the extraction percentage of zinc.

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Section: Introductionmentioning

confidence: 99%

Extraction of Zinc from Zinc Sublimber with Sulfuric, Thermal and Extraction Phosphoric Acid

Ramazonova,

Turaev,

Mamurov

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The alkaline extractive processes studied are as follows: leaching → solid-liquid separation → metal recovery stages. However, solid-liquid separation by filtration, especially for strong alkaline, is difficult [25]. Thus, some dissolved Pb and Zn from ZPLRs remain in residues if thorough filtration and the washing of leaching residues are not carried out.…”

Section: Introductionmentioning

confidence: 99%

Alkaline Leaching and Concurrent Cementation of Dissolved Pb and Zn from Zinc Plant Leach Residues

et al. 2022

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Zinc plant leach residues (ZPLRs), particularly those produced using old technologies, have both economic importance as secondary raw materials and have environmental impacts because they contain hazardous heavy metals that pose risks to human health and the environment. Therefore, the extraction and recovery of these metals from ZPLRs has both economic and environmental benefits. In this study, we investigated the removal of lead (Pb) and zinc (Zn) from ZPLRs by alkaline (NaOH) leaching and the concurrent cementation of dissolved Pb and Zn using aluminum (Al) metal powder. The effects of the leaching time, NaOH concentration, solid-to-liquid ratio (S/L), and dosage of Al metal powder on the extraction of Pb and Zn were investigated. Pb and Zn removal efficiencies increased with increasing NaOH concentrations and decreasing S/Ls. The Pb and Zn removal efficiencies were 62.2% and 27.1%, respectively, when 2.5 g/50 mL (S/L) of ZPLRs were leached in a 3 M NaOH solution for 30 min. The extraction of Pb and Zn could be attributed to the partitioning of these metals in relatively more mobile phases—water-soluble, exchangeable, and carbonate phases—in ZPLRs. Around 100% of dissolved Pb and less than 2% of dissolved Zn were cemented in leaching pulp when Al metal powder was added. Minerals in the solid residues, particularly iron oxides minerals, were found to suppress the cementation of extracted Zn in leaching pulp, and when they were removed by filtration, Zn was recovered by Al metal powder via cementation.

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“…Copper soot was usually leached and converted into a leaching solution containing copper and arsenic [14,15]. The method of acid leaching was widely used due to its high efficiency and low cost [16,17]. In order to separate and recover copper and arsenic from acid leaching solution, the most common methods were chemical precipitation, adsorption, extraction and ion exchange [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Selective Separation Recovery of Copper and Arsenic from the Leaching Solution of Copper Soot

Yang

Zhang

Zhou

et al. 2022

Metals

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Through the main chemical reaction of metal ions and S2−, a new type of sulfide precipitant was first prepared and used to realize the selective separation recovery of copper and arsenic from the leaching solution of copper soot. It is proven by experimental results that the prepared sulfide precipitant could realize the efficient separation recovery of copper and arsenic. Indeed, the copper sulfide slag with Cu grade of about 47% and arsenic trisulfide slag with As operation recovery of about 98% could be obtained. The results of chemical reaction energy calculation analysis and SEM images analysis illustrate that the selective separation recovery of copper and arsenic mainly depended on the chemical reactions of sulfide precipitation. The ions of S2− and HS− produced by the prepared sulfide precipitant could react with Cu2+ and arsenic components to form CuS and As2S, respectively, in the copper and arsenic recovery procedure. In addition, the smaller solubility of CuS and the lower rate of S2− engendered by the sulfide precipitant were key to achieving the efficient separation and recovery of copper and arsenic.

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Separation of arsenic and extraction of zinc and copper from high-arsenic copper smelting dusts by alkali leaching followed by sulfuric acid leaching

Cited by 15 publications

References 32 publications

Extraction of Zinc from Zinc Sublimber with Sulfuric, Thermal and Extraction Phosphoric Acid

Extraction of Zinc from Zinc Sublimber with Sulfuric, Thermal and Extraction Phosphoric Acid

Alkaline Leaching and Concurrent Cementation of Dissolved Pb and Zn from Zinc Plant Leach Residues

Selective Separation Recovery of Copper and Arsenic from the Leaching Solution of Copper Soot

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