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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

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ORCID:

Choi Moo Sung

Jei-Pil Wang

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

e-mail:

ORCID:

Jei-Pil Wang Wang

e-mail:

ORCID:

Pukyong National University, Department of Metallurgical Engineering, Busan, Republic of Korea

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Manufacture of Low Sulphur Pig Iron from Copper Slag

Abstract

Authors and Affiliations

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

Abstract

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Authors and Affiliations