Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil

Abstract To improve the recovery of copper, the viscosity of copper molten slag is decreased by the reduction of magnetic iron, which, in turn, accelerates the settling and separation of copper droplets from the slag. A new technology is proposed in which waste cooking oil is used as a reductant to...

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Autores principales:	Bo Li, Xubin Wang, Hua Wang, Yonggang Wei, Jianhang Hu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ef124b16d50048f78b05fe04fd8ad4ce
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spelling	oai:doaj.org-article:ef124b16d50048f78b05fe04fd8ad4ce2021-12-02T12:32:28ZSmelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil10.1038/s41598-017-02696-y2045-2322https://doaj.org/article/ef124b16d50048f78b05fe04fd8ad4ce2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02696-yhttps://doaj.org/toc/2045-2322Abstract To improve the recovery of copper, the viscosity of copper molten slag is decreased by the reduction of magnetic iron, which, in turn, accelerates the settling and separation of copper droplets from the slag. A new technology is proposed in which waste cooking oil is used as a reductant to reduce magnetic iron in the copper smelting slag and consequently reduce carbon emissions in the copper smelting process. A kinetic model of the reduction of magnetic iron in copper slag by waste cooking oil was built using experimental data, and the accuracy of the model was verified. The results indicated that the magnetic iron content in the copper slag decreased with increasing reduction time and an increase in temperature more efficiently reduced magnetic iron in the copper slag. The magnetic iron in the copper slag gradually transformed to fayalite, and the viscosity of the copper molten slag decreased as the magnetic iron content decreased during the reduction process. The reduction of magnetic iron in the copper molten slag using waste cooking oil was a first-order reaction, and the rate-limiting step was the mass transfer of Fe3O4 through the liquid boundary layer.Bo LiXubin WangHua WangYonggang WeiJianhang HuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bo Li Xubin Wang Hua Wang Yonggang Wei Jianhang Hu Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil
description	Abstract To improve the recovery of copper, the viscosity of copper molten slag is decreased by the reduction of magnetic iron, which, in turn, accelerates the settling and separation of copper droplets from the slag. A new technology is proposed in which waste cooking oil is used as a reductant to reduce magnetic iron in the copper smelting slag and consequently reduce carbon emissions in the copper smelting process. A kinetic model of the reduction of magnetic iron in copper slag by waste cooking oil was built using experimental data, and the accuracy of the model was verified. The results indicated that the magnetic iron content in the copper slag decreased with increasing reduction time and an increase in temperature more efficiently reduced magnetic iron in the copper slag. The magnetic iron in the copper slag gradually transformed to fayalite, and the viscosity of the copper molten slag decreased as the magnetic iron content decreased during the reduction process. The reduction of magnetic iron in the copper molten slag using waste cooking oil was a first-order reaction, and the rate-limiting step was the mass transfer of Fe3O4 through the liquid boundary layer.
format	article
author	Bo Li Xubin Wang Hua Wang Yonggang Wei Jianhang Hu
author_facet	Bo Li Xubin Wang Hua Wang Yonggang Wei Jianhang Hu
author_sort	Bo Li
title	Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil
title_short	Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil
title_full	Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil
title_fullStr	Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil
title_full_unstemmed	Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil
title_sort	smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/ef124b16d50048f78b05fe04fd8ad4ce
work_keys_str_mv	AT boli smeltingreductionandkineticsanalysisofmagneticironincopperslagusingwastecookingoil AT xubinwang smeltingreductionandkineticsanalysisofmagneticironincopperslagusingwastecookingoil AT huawang smeltingreductionandkineticsanalysisofmagneticironincopperslagusingwastecookingoil AT yonggangwei smeltingreductionandkineticsanalysisofmagneticironincopperslagusingwastecookingoil AT jianhanghu smeltingreductionandkineticsanalysisofmagneticironincopperslagusingwastecookingoil
_version_	1718394071779639296

Smelting reduction and kinetics analysis of magnetic iron in copper slag using waste cooking oil

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