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Recovery of Pig Iron from Copper Smelting Slag by Reduction Smelting

U. Erdenebold H.-M. Choi J.-P. Wang
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 4 | 1793-1798 | DOI: 10.24425/amm.2018.125106
Keywords copper slag reduction pig iron fayalite recovery
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Abstract

Copper slag is a by-product obtained during smelting and refining of copper. Copper smelting slag typically contains about 1 wt.% copper and 40 wt.% iron depending upon the initial ore quality and the furnace type. Main components of copper slag are iron oxide and silica. These exist in copper slag mainly in the form of fayalite (2FeO ·SiO2). This study was intended to recover pig iron from the copper smelting slag by reduction smelting method. At the reaction temperature of below 1400°С the whole copper smelting slag was not smelted, and some agglomerated, showing a mass in a sponge form. The recovery behavior of pig iron from copper smelting slag increases with increasing smelting temperature and duration. The recovery rate of pig iron varied greatly depending on the reaction temperature.

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Authors and Affiliations

U. Erdenebold
H.-M. Choi
J.-P. Wang

Manufacture of Low Sulphur Pig Iron from Copper Slag

Urtnasan Erdenebold Choi Moo Sung Jei-Pil Wang
Archives of Metallurgy and Materials | 2020 | vol. 65 | No 1 | 349-355 | DOI: 10.24425/amm.2020.131737
Keywords copper slag desulphurization roasting sulphur basicity
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Abstract

Copper slag differs by chemical composition and structure, depending on the type of processing. Copper slag typically contains about 1 wt.% copper and 40 wt.% iron depending upon the initial ore quality and type of furnace used. The aim is to produce a typical foundry pig iron with the chemical composition of C > 3.40 wt.%, Si 1.40 to 1.80 wt.%, Mn 0.30 to 0.90 wt.%, P < 0.03 wt.% and S < 0.03 wt.% from copper slag. But foundry pig iron manufactured from copper slag contains a high sulphur content. Therefore, this study examines how to conduct desulphurization. Desulphurization roasting and reduction smelting with desulphurization additives used to remove sulphur from the copper slag. The results showed that desulphurization effect of desulphurization roasting is poor but when combined with reduction smelting with CaO addition is possible to manufacture low sulphur pig iron from copper smelting slag.

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Authors and Affiliations

Urtnasan Erdenebold
ORCID: ORCID
Choi Moo Sung
Jei-Pil Wang

The Use of Coffee Waste in the Reduction of Metallurgical Slags

T. Matuła Ł. Kortyka Ł. Myćka J. Łabaj T. Wojtal
Archives of Foundry Engineering | 2023 | vol. 23 | No 1 | 103-109 | DOI: 10.24425/afe.2023.144285
Keywords Solid coffee grounds reduction Copper slag Calorimeter
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Abstract

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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Authors and Affiliations

T. Matuła
1
ORCID: ORCID
Ł. Kortyka
Ł. Myćka
2
J. Łabaj
1 2
ORCID: ORCID
T. Wojtal
1
  1. Silesian University of Technology, Faculty of Materials Engineering, Krasińskiego 8, 40-019 Katowice, Poland
  2. Łukasiewicz Research Network - Institute of Non-Ferrous Metals, Sowińskiego 5, 44-100 Gliwice, Poland

Chemical and Mineralogical Analysis of Reformed Slag during Iron Recovery from Copper Slag in the Reduction Smelting

Urtnasan Erdenebold Jei-Pil Wang Wang
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 3 | 809-818 | DOI: 10.24425/amm.2021.136385
Keywords Copper slag fayalite pig iron reformed slag
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Abstract

Copper slag is usually a mixture of iron oxide and silicon dioxide, which exist in the form of fayalite (2FeO·SiO2), and contains ceramic components as the SiO2, Al2O3 and CaO depending on the initial ore quality and the furnace type. Our present study was focused on manufacture of foundry pig iron with Cu content from copper slag using high-temperature reduction smelting and investigate utilization of by-products as a reformed slag, which is giving additional value to the recycling in a replacement of raw material of Portland cement. Changes of the chemical and mineralogical composition of the reformed slag are highly dependent on the CaO concentration in the slag. The chemical and mineralogical properties and microstructural analysis of the reformed slag samples were determined through X-ray Fluorescence spectroscopy, X-Ray diffractometer and Scanning Electron Microscopy connected to the dispersive spectrometer studies.
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Authors and Affiliations

Urtnasan Erdenebold
1
ORCID: ORCID
Jei-Pil Wang Wang
1
ORCID: ORCID
  1. Pukyong National University, Department of Metallurgical Engineering, Busan, Republic of Korea

RECOVERY OF IRON FROM COPPER SLAG BY CARBOTHERMIC REDUCTION AND MAGNETIC SEPARATION IN THE PRESENCE OF CaO

T. Chun G. Mu Z. Di H. Long C. Ning D. Li
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 1 | DOI: 10.24425/118941
Keywords copper slag recovery of iron carbothermic reduction magnetic separation
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Authors and Affiliations

T. Chun
G. Mu
Z. Di
H. Long
C. Ning
D. Li

Thermal and mechanical properties of lightweight concrete with waste copper slag as fine aggregate

Roman Jaskulski Piotr Dolny Yaroslav Yakymechko
Archives of Civil Engineering | 2021 | vol. 67 | No 3 | 299-318 | DOI: 10.24425/ace.2021.138057
Keywords lightweight concrete waste copper slag thermal properties sustainable building materials
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Abstract

The article presents the results of investigation of mechanical and thermal properties of lightweight concrete with waste copper slag as fine aggregate. The obtained results were compared with the results of concrete of the same composition in which natural fine aggregate (river sand) was used. The thermal properties tests carried out with the ISOMET 2114 device included determination of the following values: thermal conductivity coefficient, thermal volume capacity and thermal diffusivity. After determining the material density, the specific heat values were also calculated. The thermal parameters were determined in two states of water saturation: on fully saturated material and dried to constant mass at 65°C. Compressive strength, open porosity and bulk density are given as supplementary values. The results of the conducted research indicate that replacing sand with waste copper slag allows to obtain concrete of higher ecological values, with similar mechanical parameters and allowing to obtain significant energy savings in functioning of cubature structures made of it, due to a significantly lower value of thermal conductivity coefficient.
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Authors and Affiliations

Roman Jaskulski
1
ORCID: ORCID
Piotr Dolny
1
ORCID: ORCID
Yaroslav Yakymechko
1
ORCID: ORCID
  1. Warsaw University of Technology, Faculty of Civil Engineering, Mechanics and Petrochemistry, ul. Łukasiewicza 17, 09-400 Płock, Poland

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