The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning

Settling time, system temperature and reductant amount play an important role in the recovery of matte from copper slag. This study investigated the settling behavior of matte particles in copper slag and the effects of the settling time, system temperature, and reductant amount on the macrostructur...

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Autores principales:	Haipei Zhang, Bo Li, Yonggang Wei, Hua Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Copper slag cleaning Settling separation Matte Fe3O4 Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/bd58ecf045594a8fb22d0105a040e306
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spelling	oai:doaj.org-article:bd58ecf045594a8fb22d0105a040e3062021-11-30T04:16:17ZThe settling behavior of matte particles in copper slag and the new technology of copper slag cleaning2238-785410.1016/j.jmrt.2021.11.061https://doaj.org/article/bd58ecf045594a8fb22d0105a040e3062021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421013405https://doaj.org/toc/2238-7854Settling time, system temperature and reductant amount play an important role in the recovery of matte from copper slag. This study investigated the settling behavior of matte particles in copper slag and the effects of the settling time, system temperature, and reductant amount on the macrostructure of slag, microstructure of matte particles, and copper loss. The results showed that the settling behavior of matte particles in slag at the experimental temperature was a process of aggregation and growth. With an increase in settling time and temperature, as well as the addition of an appropriate amount of anthracite, the foaming slag layer of the slowly cooled slag gradually disappeared, while the recovery of matte increased. However, when the amount of anthracite was too high, Fe–Cu alloy formed at the experimental temperature, which resulted in worsened fluidity of the matte in the molten slag and copper loss increased. At the experimental temperature, the settling environment of matte particles in the liquid phase layer was superior to that of the foaming slag layer. The novel idea of using rubber seed oil instead of a traditional fossil reductant to clean the copper slag was put forward. At the temperature of 1250 °C, 4 mL of rubber seed oil was injected, resulting in a settling time of ≥90 min, after which the copper content in the upper part of the slowly cooled slag was less than 0.57 wt.%, reaching the acceptable level of discardable slag in industry.Haipei ZhangBo LiYonggang WeiHua WangElsevierarticleCopper slag cleaningSettling separationMatteFe3O4Mining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 6216-6230 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Copper slag cleaning Settling separation Matte Fe3O4 Mining engineering. Metallurgy TN1-997
spellingShingle	Copper slag cleaning Settling separation Matte Fe3O4 Mining engineering. Metallurgy TN1-997 Haipei Zhang Bo Li Yonggang Wei Hua Wang The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning
description	Settling time, system temperature and reductant amount play an important role in the recovery of matte from copper slag. This study investigated the settling behavior of matte particles in copper slag and the effects of the settling time, system temperature, and reductant amount on the macrostructure of slag, microstructure of matte particles, and copper loss. The results showed that the settling behavior of matte particles in slag at the experimental temperature was a process of aggregation and growth. With an increase in settling time and temperature, as well as the addition of an appropriate amount of anthracite, the foaming slag layer of the slowly cooled slag gradually disappeared, while the recovery of matte increased. However, when the amount of anthracite was too high, Fe–Cu alloy formed at the experimental temperature, which resulted in worsened fluidity of the matte in the molten slag and copper loss increased. At the experimental temperature, the settling environment of matte particles in the liquid phase layer was superior to that of the foaming slag layer. The novel idea of using rubber seed oil instead of a traditional fossil reductant to clean the copper slag was put forward. At the temperature of 1250 °C, 4 mL of rubber seed oil was injected, resulting in a settling time of ≥90 min, after which the copper content in the upper part of the slowly cooled slag was less than 0.57 wt.%, reaching the acceptable level of discardable slag in industry.
format	article
author	Haipei Zhang Bo Li Yonggang Wei Hua Wang
author_facet	Haipei Zhang Bo Li Yonggang Wei Hua Wang
author_sort	Haipei Zhang
title	The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning
title_short	The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning
title_full	The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning
title_fullStr	The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning
title_full_unstemmed	The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning
title_sort	settling behavior of matte particles in copper slag and the new technology of copper slag cleaning
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/bd58ecf045594a8fb22d0105a040e306
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The settling behavior of matte particles in copper slag and the new technology of copper slag cleaning

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