Separation and recovery of Cu and As from copper electrolyte through electrowinning and SO2 reduction

Zheng, Yuanyi; Peng, Yating; Lang, Ke; Wen-mi, Chen

doi:10.1016/s1003-6326(13)62713-2

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…In the smelting of copper or lead-zinc ore, larger amounts of acidic wastewater are discharged when gaseous emission containing SO 2 , As, Cu, Pb, Zn and other impurities are washed with diluted acid [ 7 ]. Moreover, wasted electrolyte with a high concentration of arsenic is produced abundantly in copper and lead-zinc electrolyte processes [ 8 , 9 ]. At present, there are many treatment methods for arsenic-containing wastewater, such as precipitation, adsorption, and biological methods [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Treatment of Arsenic Sulfide Residues from Arsenic-Bearing Acid Wastewater

Yao

Min

et al. 2018

IJERPH

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Arsenic sulfide residue (ASR), a by-product from the treatment of arsenic-bearing acidic wastewater, is abundantly generated but not properly disposed of in China. The utilization of such high-content arsenic waste residue is limited by the market. The traditional methods of stabilization/solidification (S/S) by lime cement or iron salt have a large mass/volume addition, high dumping cost and secondary pollution risk. In this paper, hydrothermal technology was used to treat three kinds of ASRs obtained from different smelters to minimize waste. The leaching toxicity and chemical speciation of the generated products was also evaluated by TCLP and BCR analyses. It was found that the hydrothermal treatment could greatly reduce the volume and moisture content of the ASRs. TCLP tests showed that the leachability of arsenic and heavy metals significantly decreased after the treatment. According to the BCR analysis, most of the unstable As, Cd and Cr transformed into a residual fraction. Finally, XRD, SEM, Raman and XPS techniques were carried out to reveal the mechanism. As a result, hydrothermal treatment can efficiently achieve the dehydration, volume reduction and stabilization/solidification of ASRs.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal Treatment of Arsenic Sulfide Residues from Arsenic-Bearing Acid Wastewater

Yao

Min

et al. 2018

IJERPH

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“…The pH was adjusted to a certain value using sulfuric acid. SO 2 was introduced into the solution to reduce As( v ) to As( iii ), as shown in eqn (1)–(3) , 38 and prevent As( iii ) from forming Cu(AsO 2 ) 2 precipitates with Cu 2+ . The flow rate of SO 2 was adjusted using a switch valve.…”

Section: Methodsmentioning

confidence: 99%

Separation and recovery of arsenic from As, Cu, and Zn rich leaching liquor using a reduction-crystallization approach

et al. 2021

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“…Arsenic from anode copper can accumulate in the electrolyte during copper electrorefining. Deposit of the arsenic on the cathode copper significantly affects its quality and production rate during the copper electrorefining [14]. Removal of arsenic before the electrorefining process is important to produce high-quality cathode copper.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Control of Arsenic during Copper Converting and Refining

Tan

Liao

et al. 2022

Metals

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Arsenic content in copper concentrates is continuously increasing worldwide. It is desirable to remove arsenic from copper in the earlier stages of copper making due to the deposition of arsenic to cathode copper during the electrorefining process. Effects of temperature, flux, and oxygen on the distribution of arsenic during copper converting and fire refining processes were studied using FactSage 8.2. The results showed that arsenic can be effectively removed by proper selection of converting and refining slags. The decrease in Fe/SiO2 or Fe/CaO ratio in the converting slag is favorable for arsenic distributed to slag. CaO is more effective than SiO2 in decreasing the liquidus temperature of the slag and arsenic content in the blister copper during the converting process. Na2O or CaO as a flux is effective to remove arsenic in the fire refining process.

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Separation and recovery of Cu and As from copper electrolyte through electrowinning and SO2 reduction

Cited by 14 publications

References 18 publications

Hydrothermal Treatment of Arsenic Sulfide Residues from Arsenic-Bearing Acid Wastewater

Hydrothermal Treatment of Arsenic Sulfide Residues from Arsenic-Bearing Acid Wastewater

Separation and recovery of arsenic from As, Cu, and Zn rich leaching liquor using a reduction-crystallization approach

Distribution and Control of Arsenic during Copper Converting and Refining

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