A potential industrial waste–waste co-treatment process of utilizing waste SO2 gas and residue heat to recover Co, Ni, and Cu from copper smelting slag

Wan, Xingbang; Taskinen, Pekka; Shi, Junjie; Jokilaakso, Ari

doi:10.1016/j.jhazmat.2021.125541

Cited by 32 publications

(7 citation statements)

References 46 publications

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“…Rare and precious metals have a wide range of applications in modern industry, such as in special steels, high temperature-resistant alloys, and electrical, ceramic, and rocket technology. − In particular, silver has decent applications in catalysts and the electronic electroplating industries, and gold has an irreplaceable role in the fields of electronic communications, medical treatment, and aerospace. Due to their good stability, platinum group metals and their alloys can be used as catalysts in the industry because of their corrosion-resistance characteristics .…”

Section: Introductionmentioning

confidence: 99%

Green Capture of Silver by Bismuth from Decoppered Anode Slime with Low Energy Consumption

Zeng

Liu

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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As a consequence of lead pollution, low efficiency, and high energy consumption in the current pyrometallurgical processing of copper anode slime, a novel metallurgical recycling technology for processing copper anode slime was developed in this research. The new process uses bismuth instead of lead to realize high-efficiency enrichment of silver with lower energy consumption and higher capture efficiency. In this study, to determine the mechanism of silver capture by bismuth and confirm the possibility of low-temperature silver capture, the effects of coke powder, Na 2 CO 3 , SiO 2 , Bi 2 O 3 , and temperature on the silver content in slag during bismuth capture of precious metals were investigated. The results show that the silver content remaining in slag is only 0.157% with a Bi 2 O 3 addition of 25% and a Na 2 O/SiO 2 ratio of 0.417 at 950 °C for 8 h. The silver content in slag obtained from the proposed process was significantly lower than the allowable residue standard of China (silver content in slag <1%). The obtained bismuth−silver alloy can facilitate the recycling of bismuth through the blowing process. Considering that bismuth is a green metal, the pollution of lead in the silver recovery process is avoided, and the capture temperature of silver is only 950 °C, which is significantly lower than that of lead capture (1100−1200 °C). The energy consumption is significantly reduced, so the proposed process can accomplish the clean recovery of rare and precious metals in copper anode slime and promote the green development of the copper metallurgy industry.

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Section: Introductionmentioning

confidence: 99%

Green Capture of Silver by Bismuth from Decoppered Anode Slime with Low Energy Consumption

Zeng

Liu

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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“…Due to valuable metals from copper slag, the incremental investigations have focused on recovery of valuable metal elements such as Cu, Fe, Au, Ag etc. In recent years, various physical and chemical methods have been developed to recover valuable metals including dilution, 8 wet leaching, 9 flotation, 10 magnetic separation, 11 and wet leaching 12,13 . According to previous literatures, the recovery of iron as ironmaking raw material showed a feasible method and attracts more attentions.…”

Section: Introductionmentioning

confidence: 99%

Utilization of copper slag in the fabrication of silica refractory: Characteristics and performance evaluation

Lv,

Gu,

Zhang

et al. 2023

Int J Applied Ceramic Tech

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It is urgently necessary for environmental resource utilization of copper slag with incremental quantities of stacked copper slag. In this paper, copper slag has been used as mineralizer and raw material to prepare silica refractory. The effect of copper slag on phase composition, microstructure, mechanical and load deformation performance has been investigated. The results indicate that the components of copper slag as mineralizer promote the formation of tridymite. Simultaneously, copper slag promotes the densification of silica refractory and glass phase increases due to the mineralizer and impurities in copper slag. The increased glass phase promotes the cold crushing strength and cold modulus of rupture for silica refractory. While the hot modulus of rupture slightly decreases by 1.5 MPa with 6 wt% copper slag. The load softening temperature and high‐temperature creep attains 1632.6°C and ‐5.5%, respectively. It is estimated that the potential application of silica refractory with copper slag on upper part of copper stove (low‐temperature and low‐load region) is acceptable in consideration of environmental utilization of solid waste.This article is protected by copyright. All rights reserved

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“…Due to the huge amounts produced every year, WEEE is considered as a valuable urban resource. Various methods, such as physical separation, electrostatic separation, pyrometallurgical, and hydrometallurgical processes have been investigated with the focus of recycling the valuable metals from these secondary resources [5,6].…”

Section: Introductionmentioning

confidence: 99%

On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process

Wan

Kleemola

Klemettinen

et al. 2021

J. Sustain. Metall.

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The recycling and recovery of precious metals from secondary materials, such as waste-printed circuit boards, are an important area of circular economy research due to the limited existing resources and increasing amount of e-waste produced by the rapid development of technology. In this study, the kinetic behavior of precious metals Au, Ag, Pt, and Pd between copper matte and iron-silicate slag was investigated at a typical flash smelting temperature of 1300 °C in both air and argon atmospheres. SEM–EDS, EPMA, and LA-ICP-MS-advanced analysis methods were used for sample characterization. The results indicate that precious metals favor the matte phase over slag, and the deportment to matte occurred swiftly within a short time after the system had reached the experimental temperature. With increasing contact times, the precious metals were distributed increasingly into the sulfide matte. The distribution coefficients, based on experimentally measured element concentrations, followed the order of palladium > platinum > gold > silver in both air and argon, and the matte acted as an efficient collector of these precious metals. The obtained results can be applied to industrial copper matte smelting processes, and they also help in upgrading CFD models to simulate the flash smelting process more precisely. Graphical Abstract

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A potential industrial waste–waste co-treatment process of utilizing waste SO2 gas and residue heat to recover Co, Ni, and Cu from copper smelting slag

Cited by 32 publications

References 46 publications

Green Capture of Silver by Bismuth from Decoppered Anode Slime with Low Energy Consumption

Green Capture of Silver by Bismuth from Decoppered Anode Slime with Low Energy Consumption

Utilization of copper slag in the fabrication of silica refractory: Characteristics and performance evaluation

On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process

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