Recovery of Copper from the Slag of Khatoonabad Flash Smelting Furnace by Flotation Method

Karimi, Nader; Vaghar, R.; Mohammadi, Mohammad Reza Tavakoli; Hashemi, Sattar

doi:10.1007/s40033-013-0015-3

Cited by 16 publications

(4 citation statements)

References 6 publications

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“…The authors have proceeded by further precipitation of the metals under controlled pH conditions. Flotation is extensively used to recover copper and other metals from smelter slags [ 35 , 36 ]. Flotation with xanthate collectors enhanced by chemical and mechanical activation is applied to recover copper from slags with high efficiency above 90% [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Mineralogical Characterization of Historic Copper Slag to Guide the Recovery of Valuable Metals: A Namibian Case Study

Dzinomwa,

Mapani,

Nghipulile

et al. 2023

Materials

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The depletion of the ore reserves in the world necessitates the search for secondary sources such as waste products (tailings and slag). The treatment and cleaning up of such secondary sources also has a positive impact on the environment. A smelter in Namibia we examined had historic slag which accumulated over decades of its operating life, thus posing the challenge of how best to collect representative samples to evaluate and propose viable methods of recovering contained metals. In this study, analytical and mineralogical characterization of the slag was performed using X-ray fluorescence (XRF) analysis, atomic absorption spectrometer (AAS), ICP-OES, scanning electron microscopy energy dispersive spectroscopy (SEM-EDS) analysis, and optical microscopy analysis. The chemical analyses showed that the metal values contained in the slag were mainly copper, lead, and zinc whose average contents were approximately 0.35% Cu, 3% Pb, and 5.5% Zn. About 10.5% Fe was also contained in the slag. Germanium was detected by scanning electron microscopy, but was however below detection limits of the chemical analysis equipment used. Based on the results, approximate conditions under which the different slag phases were formed were estimated and the recovery routes for the various metals were proposed. Analysis by both optical and scanning electron microscopy revealed that Zn and Fe occurred mainly in association with O as oxides, while Cu and Pb were mainly associated with S as sulphides. The slag consisted of three different phases, namely the silicate phase (slag), metallic phase and the sulphide phases. The phases in the slag were mainly silicate phases as well as metallic and sulphide phases. It was observed that the metallic and sulphide phases were dominant in the finer size fractions (−75 µm) whereas the sulphide phase was also present in the coarser size fractions (+300 µm). An important finding from the microscopy examination was that the sulphide phases were interstitial and could be liberated from the slag. This finding meant that liberation and subsequent concentration of the sulphide phases was feasible using conventional processing techniques.

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Section: Introductionmentioning

confidence: 99%

Mineralogical Characterization of Historic Copper Slag to Guide the Recovery of Valuable Metals: A Namibian Case Study

Dzinomwa,

Mapani,

Nghipulile

et al. 2023

Materials

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“…Copper and other precious metals could be effectively recovered during copper slag cleaning process [6,7]. In industry, cleaning in an electric furnace [8][9][10][11][12] and flotation method [13][14][15][16] are mainly used to recovery copper. Flotation involves treating the slag with chemicals that bind to the metal and cause hydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

Matte separated behavior from slag during the cleaning process by using waste cooking oil as carbon neutral reductant

Wang

Wei

Zhou

et al. 2021

J min metall B Metall

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As a waste resource, waste cooking oil (WCO) has not been widely used. Based on the characteristics of WCO cracking, this study proposed to replace fossil-based reductant with WCO for copper slag cleaning, to solve the problem of carbon neutralization in this process. Copper slag cleaning experiments were carried out in a lab-scale electric furnace. The matte separated behavior from slag and the distribution of matte in slag were studied. The results showed that the Fe3O4 content decreases from 12.9 to 3.5 wt.% by injecting 2.2 mL of WCO into 300 g copper slag at 1250?C. The distribution of copper content in slag is gradient along the vertical direction. In the reduction stage, the excessive Fe3O4 is reduced and the fluidity of slag is improved. When the precipitation time above 60 minutes, the copper content in the middle and upper slag is reduced to 0.57 wt.%, which realizes the copper slag cleaning by using WCO.

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“…In order to recover metals from slag, the most commonly used technology is flotation. [1][2][3] The average total amount of CSFT adds up to tens of millions of tons per each DOI: 10.1002/clen.202000419 copper processing facility. [4] According to literature data, the copper production in 2016 only from primary sources, i.e., copper ores, was approximately 20 million tons and was almost doubled in the early 2000s.…”

Section: Introductionmentioning

confidence: 99%

Application of Copper Mining Waste in Radionuclide and Heavy Metal Immobilization

Dimović

Jelić

Šljivić-Ivanović

et al. 2021

CLEAN Soil Air Water

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Copper slag flotation tailings (CSFT), as the end waste from copper mining, are evaluated for radionuclide and heavy metal immobilization. Characterization of CSFT based on grain size and mineral composition, surface functional groups, pH and electrical conductivity in aqueous media, thermogravimetric analysis (TGA), determination of characteristic temperatures in sample melting process, leachability, and toxicity tests is conducted. The screening sorption of Mn(II), Co(II), Ni(II), Zn(II), Cd(II), and Pb(II) inactive isotopes from single-component solutions is performed. The Cd(II) ions show better sorption potential than other ions, with a sorption capacity of 0.08 mmol g −1 at the highest initial concentration. Sorption decreases in the sequence Cd(II) > Pb(II) > Zn(II) > Mn(II) > Ni(II) > Co(II) at all initial concentrations. Although CSFT shows lower sorption capability than synthetic sorbents based on fayalite and magnetite, its inexpensiveness and substantial accessible amount represent great advantages in wider utilization.

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Recovery of Copper from the Slag of Khatoonabad Flash Smelting Furnace by Flotation Method

Cited by 16 publications

References 6 publications

Mineralogical Characterization of Historic Copper Slag to Guide the Recovery of Valuable Metals: A Namibian Case Study

Mineralogical Characterization of Historic Copper Slag to Guide the Recovery of Valuable Metals: A Namibian Case Study

Matte separated behavior from slag during the cleaning process by using waste cooking oil as carbon neutral reductant

Application of Copper Mining Waste in Radionuclide and Heavy Metal Immobilization

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