Characterization and Recovery of Copper from Converter Copper Slag Via Smelting Separation

Zhou, Shiwei; Wei, Yonggang; Shi, Yu; Li, Bo; Wang, Hua

doi:10.1007/s11663-018-1364-y

Cited by 24 publications

(13 citation statements)

References 35 publications

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“…The content of Fe3O4 in the slag is approximately 9.1 wt.%, and the matte particles in the slag have adhered to the magnetite particles (Figure 8a'). As reported in the literature [38,41], matte particles have good wettability with magnetite, and the sedimentation of matte particles is hindered after they are attached to magnetite particles. From the microstructure, it could be seen that the number of matte particles in the reduced slag is less than that in the original copper slag, and the particle size is smaller.…”

Section: Injection Stagementioning

confidence: 58%

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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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Section: Injection Stagementioning

confidence: 58%

“…The matte particles in the melt are mixed with the slag, part of the matte cannot settle to the bottom of the slag layer. The previous research work [38] shows that the main factor hindering the separation of slag and matte is the content of Fe3O4.…”

Section: Injecting N2mentioning

confidence: 95%

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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“…Uma parte do cobre fica presente na escória como partículas dispersas ou aderida às partículas de outros compostos [126,127]. A perda de cobre na forma de sulfeto, óxidos ou metálica na escória pode ser físico-química ou mecânica [107,112,123,128]. As perdas físico-químicas acontecem com compostos de cobre, como óxidos ou sulfetos, e as perdas mecânicas estão relacionadas ao arrastamento do metal [107,128].…”

Section: Geralmente Os Minériosunclassified

“…Perdas físico-químicas acontecem em sua maioria quando o material possui mais de 70% de cobre [107]. O cobre normalmente permanece na escória como sulfeto, na ausência de oxidante suficiente para oxidar o enxofre, ou como óxido e silicato quando há o excesso de oxidantes [107,123]. O cobre em compostos está em sua forma catiônica, o que o torna quimicamente solúvel [128].…”

Section: Geralmente Os Minériosunclassified

“…O cobre em compostos está em sua forma catiônica, o que o torna quimicamente solúvel [128]. Já as perdas mecânicas ocorrem em sua maioria em materiais com menos de 70% de cobre, devido a fatores físicos, como arrastamento mecânico e aprisionamento influenciado pela viscosidade, ponto de fusão da escória e densidade dos componentes do material [107,112,123,126,128]. Portanto o processo pode ser melhorado com a diminuição da viscosidade da escória [112].…”

Section: Geralmente Os Minériosunclassified

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Recuperação de cobre e zinco de catalisadores exauridos.

Abreu¹

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Metal recovery from spent catalysts minimizes the volume of hazardous waste disposed of in landfills and is an alternative to conventional mining. The objectives of this dissertation are to characterize a spent catalyst residue used in the methanol synthesis process and to determine a route for copper and zinc recovery from this residue. The components that correspond to the active phase, promotor, and support of the spent catalyst were identified as copper, zinc, and aluminum, respectively. Which presented themselves as CuO, Zn3O(SO4)2, and Al2O3. The physical technique of separation through dense media, with the use of bromoform, and the pyrometallurgical techniques of reduction, zinc volatilization, and copper fusion were studied. Before the best techniques investigation, the spent catalyst was pre-treated by calcining and grinding. The parameters studied in the reduction and volatilization step were temperature, holding time, type of reducer, gas flow, and furnace rotation. In the melting step, the parameters studied were the proportion of the oxides Al2O3, CaO, and SiO2 and the amount of the fondant CaF2. The best zinc extraction obtained from the reduction and volatilization tests was 92.9% in a test carried out at 1100°C for 6 hours, with the graphite reducer, without rotation, and inert atmosphere with argon at 100mL/min. The purity of the condensed and recovered zinc in the cold finger was 80.9%. The best copper recovery test was the melt, which separated 72.4% of the metal from the rest of the sample with a purity of 73.3%. The result was achieved with the lowest proportion of silica and the highest proportion of CaF2. The sequence of techniques that presented the best metal recovery results was pre-treatment by calcining and grinding, followed by a step of reduction, zinc volatilization, and copper melting.

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Reduction of Magnetite from Copper Smelting Slag in the Presence of a Graphite Rod

Zhang

Wei

et al. 2020

Metall Mater Trans B

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Characterization and Recovery of Copper from Converter Copper Slag Via Smelting Separation

Cited by 24 publications

References 35 publications

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

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

Recuperação de cobre e zinco de catalisadores exauridos.

Reduction of Magnetite from Copper Smelting Slag in the Presence of a Graphite Rod

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