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Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study

Jarosite precipitation process (JPP) is the most frequently used procedure for iron removal in the hydrometallurgical zinc extraction process. However, there is a gap in the knowledge of the relationship between operational parameters and the low contaminant JPP on the industrial scale. This study w...

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Autores principales: Asimi, Ali, Gharibi, Khodakaram, Abkhoshk, Emad, Moosakazemi, Farhad, Chelgani, Saeed Chehreh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7589472/
https://www.ncbi.nlm.nih.gov/pubmed/33086695
http://dx.doi.org/10.3390/ma13204662
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author Asimi, Ali
Gharibi, Khodakaram
Abkhoshk, Emad
Moosakazemi, Farhad
Chelgani, Saeed Chehreh
author_facet Asimi, Ali
Gharibi, Khodakaram
Abkhoshk, Emad
Moosakazemi, Farhad
Chelgani, Saeed Chehreh
author_sort Asimi, Ali
collection PubMed
description Jarosite precipitation process (JPP) is the most frequently used procedure for iron removal in the hydrometallurgical zinc extraction process. However, there is a gap in the knowledge of the relationship between operational parameters and the low contaminant JPP on the industrial scale. This study will address these issues by investigating the behavior of zinc calcine (ZC) as a neutralizing agent, exploring the source of zinc and iron through leaching experiments, and simulating the Jarosite process of the Bafgh Zinc Smelting Company (BZSC). The results showed that the zinc dissolution efficiency was 90.3% at 90 °C, and 73% of the iron present in the calcine can be solubilized. The main outcome was the iron removal of about 85% by alkaline ions present in ZC without the addition of any precipitating agent. The second target was to evaluate the effect of operational parameters on jarosite precipitation. Results revealed that increasing the temperature to 90 °C and the stirring rate to 500 RPM as well as adjusting the ZC’s pH during the jarosite precipitation remarkably improved iron removal. Considering all these factors in the plant could improve Fe precipitation to around 80% on average.
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spelling pubmed-75894722020-10-29 Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study Asimi, Ali Gharibi, Khodakaram Abkhoshk, Emad Moosakazemi, Farhad Chelgani, Saeed Chehreh Materials (Basel) Article Jarosite precipitation process (JPP) is the most frequently used procedure for iron removal in the hydrometallurgical zinc extraction process. However, there is a gap in the knowledge of the relationship between operational parameters and the low contaminant JPP on the industrial scale. This study will address these issues by investigating the behavior of zinc calcine (ZC) as a neutralizing agent, exploring the source of zinc and iron through leaching experiments, and simulating the Jarosite process of the Bafgh Zinc Smelting Company (BZSC). The results showed that the zinc dissolution efficiency was 90.3% at 90 °C, and 73% of the iron present in the calcine can be solubilized. The main outcome was the iron removal of about 85% by alkaline ions present in ZC without the addition of any precipitating agent. The second target was to evaluate the effect of operational parameters on jarosite precipitation. Results revealed that increasing the temperature to 90 °C and the stirring rate to 500 RPM as well as adjusting the ZC’s pH during the jarosite precipitation remarkably improved iron removal. Considering all these factors in the plant could improve Fe precipitation to around 80% on average. MDPI 2020-10-19 /pmc/articles/PMC7589472/ /pubmed/33086695 http://dx.doi.org/10.3390/ma13204662 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Asimi, Ali
Gharibi, Khodakaram
Abkhoshk, Emad
Moosakazemi, Farhad
Chelgani, Saeed Chehreh
Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study
title Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study
title_full Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study
title_fullStr Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study
title_full_unstemmed Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study
title_short Effects of Operational Parameters on the Low Contaminant Jarosite Precipitation Process-an Industrial Scale Study
title_sort effects of operational parameters on the low contaminant jarosite precipitation process-an industrial scale study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7589472/
https://www.ncbi.nlm.nih.gov/pubmed/33086695
http://dx.doi.org/10.3390/ma13204662
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