Recovery of Copper from Copper Smelting Slag Using a Green Reductant

Qu, Guorui; Wei, Yonggang; Li, Bo; Wang, Hua; Yang, Yindong; McLean, Alexander

doi:10.1007/978-3-030-36540-0_37

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…The gaseous reducing agents used in the processes of copper recovery from slags are usually hydrogen, methane, carbon monoxide or natural gas [ 45 , 46 , 47 ]. It should also be mentioned that there are also studies aimed at replacing the solid carbon reducing agents with biomass and waste oils [ 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

et al. 2023

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The article presents the results of a study on metallurgical sludge reduction using electronic waste such as Printed Circuit Boards (PCBs). Two aspects were taken into account when selecting such a reducer, namely the environmental aspect and the technological aspect. The research was an attempt to use waste metal-bearing material of which the effective management causes many problems from an environmental point of view. In the technological aspect, the specific chemical composition of this waste was taken into account. Its gasification yields significant amounts of hydrocarbons, which are excellent reducing agents in such process. The separation of these compounds may additionally cause the mixing of the molten slag, which should result in faster separation of the formed metal droplets and the molten slag. In the case of the fragmented PCB (Printed Circuit Board) reducer used in this study, a significant degree of copper removal was achieved, as much as 92%. As the reduction-process time increased, the degree of copper removal also increased. For the 1 h process, the average value of copper removal was 60%, and for the 4.5 h process it was over 70%. The case was the same with the addition of reductant: as the amount of reductant added to the process increased, an increase in copper removal was observed. With the addition of 30 g of the reducing agent (per 65 g of slag), the degree of copper removal was over 90%.

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Section: Introductionmentioning

confidence: 99%

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

et al. 2023

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“…In the case of slags derived from the technologies of copper production, this chemical element may appear as Cu+ cations or copper oxide. Considering the copper extraction from this type of material, the process is based on the course of a reduction reaction where a solid carboniferous reducer is mainly used [3,4]. It is assumed that the secondary slag generated in the analysed reduction process should contain less than 0.5 wt% Cu to be a safe material that can be stored or utilised in other branches.…”

Section: Introductionmentioning

confidence: 99%

Application of Sunflower Husk Pellet as a Reducer in Metallurgical Processes

Matula,

Labaj,

Vadasz

et al. 2023

Materials

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In relation to the climate policy being introduced, the search for a replacement for solid fossil fuels with renewable raw materials is ongoing. In this study, a potential biomass (sunflower husk pellet) application in the process of copper slag reduction was assessed. For the purpose of raw material characterisation, thermogravimetric tests were carried out and characteristic temperature points were determined with the use of a high-temperature microscope. The slag reduction tests led to the recovery of 97% of copper and a decrease in this metal content in the slag to less than 0.5% Cu, which enables safe storage or use in other industrial branches.

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“…The two carbon-bearing materials, as well as graphite and anthracite, are the basic carbon-bearing materials used in pyrometallurgical processes of copper recovery from slags [13][14][15][16]. It should be mentioned that there are also studies on the use of fine-grained coal fractions in these processes, generated in coal enrichment or processing [16][17][18], as well as waste oils and biomass [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

The Use of Coffee Waste in the Reduction of Metallurgical Slags

Matuła,

Kortyka,

Myćka

et al. 2022

Archives of Foundry Engineering

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Coffee is grown in over 50 countries around the world, and its sale is the largest in the world trade after crude oil. In the case of coffee beans, after consumption remains a solid waste in the form of a waste plant extract. At present, coffee waste is not fully managed, which means that it is often deposited in landfills. Taking into account their availability on the market and the content of significant amounts of carbon in them, it was proposed to use them as a reducing agent in the processing of copper slags. The use of Solid Coffee Grounds (SCG) as an alternative reducing agent for coke and coke breeze can be beneficial in two aspects. The first is the reduction of carbon dioxide emissions in the process, and the second is due to the possible release of hydrocarbons from these wastes at high temperatures, which, apart from participating in the reduction process itself, causes also mixing of the bath in the melting unit, which facilitates the process of copper sedimentation in the slag. The experiments carried out on a laboratory scale showed the possibility of reducing the copper content in the slag after the reduction process from 10.3 to 0.41 % by mass. The obtained values of the relative degree of copper splashing for all experiments ranged from 88.4 to 96.0 %. The presented solution is an innovative approach to the use of SCG in the processing of copper slags.

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Recovery of Copper from Copper Smelting Slag Using a Green Reductant

Cited by 7 publications

References 19 publications

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

Application of Sunflower Husk Pellet as a Reducer in Metallurgical Processes

The Use of Coffee Waste in the Reduction of Metallurgical Slags

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