Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment

The content of zinc in copper smelter slags obtained from pyrometallurgical copper production is comparable to the content of this metal in zinc ores. Therefore, these slags are considered a valuable secondary resource for zinc recovery. At the same time, the features of the mineralogical compositi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Mehmet Deniz Turan, Galymzhan A. Karamyrzayev, Rashid K. Nadirov
Formato:	article
Lenguaje:	EN KK RU
Publicado:	al-Farabi Kazakh National University 2021
Materias:	copper smelter slag leaching zinc recovery isopropanol n-pentanol Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/5a09d733f26e419f9b44e1d18a2c859f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:5a09d733f26e419f9b44e1d18a2c859f
record_format	dspace
spelling	oai:doaj.org-article:5a09d733f26e419f9b44e1d18a2c859f2021-11-30T10:30:24ZRecovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment10.15328/cb12441563-03312312-7554https://doaj.org/article/5a09d733f26e419f9b44e1d18a2c859f2021-10-01T00:00:00Zhttps://bulletin.chemistry.kz/index.php/kaznu/article/view/1244https://doaj.org/toc/1563-0331https://doaj.org/toc/2312-7554 The content of zinc in copper smelter slags obtained from pyrometallurgical copper production is comparable to the content of this metal in zinc ores. Therefore, these slags are considered a valuable secondary resource for zinc recovery. At the same time, the features of the mineralogical composition of the slag make the extraction of zinc from it very problematic. Most of the zinc is concentrated in the refractory zinc ferrite (ZnFe2O4). To avoid the formation of a viscous pulp when leaching copper smelter slag with an aqueous solution of sulfuric acid, in this work, the slag was leached with sulfuric acid also in isopropanol and n-pentanol, under the following conditions: 0.5 M H2SO4, pulp density 50 g/L, magnetic stirrer rotation speed 600 rpm. The influence of the duration and temperature of leaching milled (≤100 μm) copper smelter slag of the Balkhash copper smelter on the extraction of zinc into solution was investigated. It was found that the maximum zinc recovery into an aqueous solution was 75 ± 2% at 363 K and 210 min. Replacing water with isopropanol or n-pentanol led to an increase in zinc recovery to 82 ± 2% at 210 min and a lower temperature (353 K) than in an aqueous environment. An increase in temperature to 383 K during leaching in n-pentanol made it possible to extract 92 ± 2% of zinc. A shrinking core model was used to describe the kinetics of the zinc leaching process. It was found that the limiting stage of the process under all investigated conditions is the chemical leaching reaction. Some kinetic characteristics of the leaching process were calculated, in particular, the apparent reaction rate constants, as well as the activation energy. Mehmet Deniz TuranGalymzhan A. KaramyrzayevRashid K. Nadiroval-Farabi Kazakh National Universityarticlecopper smelter slagleachingzinc recoveryisopropanoln-pentanolChemistryQD1-999ENKKRUChemical Bulletin of Kazakh National University, Vol 103, Iss 4 (2021)
institution	DOAJ
collection	DOAJ
language	EN KK RU
topic	copper smelter slag leaching zinc recovery isopropanol n-pentanol Chemistry QD1-999
spellingShingle	copper smelter slag leaching zinc recovery isopropanol n-pentanol Chemistry QD1-999 Mehmet Deniz Turan Galymzhan A. Karamyrzayev Rashid K. Nadirov Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment
description	The content of zinc in copper smelter slags obtained from pyrometallurgical copper production is comparable to the content of this metal in zinc ores. Therefore, these slags are considered a valuable secondary resource for zinc recovery. At the same time, the features of the mineralogical composition of the slag make the extraction of zinc from it very problematic. Most of the zinc is concentrated in the refractory zinc ferrite (ZnFe2O4). To avoid the formation of a viscous pulp when leaching copper smelter slag with an aqueous solution of sulfuric acid, in this work, the slag was leached with sulfuric acid also in isopropanol and n-pentanol, under the following conditions: 0.5 M H2SO4, pulp density 50 g/L, magnetic stirrer rotation speed 600 rpm. The influence of the duration and temperature of leaching milled (≤100 μm) copper smelter slag of the Balkhash copper smelter on the extraction of zinc into solution was investigated. It was found that the maximum zinc recovery into an aqueous solution was 75 ± 2% at 363 K and 210 min. Replacing water with isopropanol or n-pentanol led to an increase in zinc recovery to 82 ± 2% at 210 min and a lower temperature (353 K) than in an aqueous environment. An increase in temperature to 383 K during leaching in n-pentanol made it possible to extract 92 ± 2% of zinc. A shrinking core model was used to describe the kinetics of the zinc leaching process. It was found that the limiting stage of the process under all investigated conditions is the chemical leaching reaction. Some kinetic characteristics of the leaching process were calculated, in particular, the apparent reaction rate constants, as well as the activation energy.
format	article
author	Mehmet Deniz Turan Galymzhan A. Karamyrzayev Rashid K. Nadirov
author_facet	Mehmet Deniz Turan Galymzhan A. Karamyrzayev Rashid K. Nadirov
author_sort	Mehmet Deniz Turan
title	Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment
title_short	Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment
title_full	Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment
title_fullStr	Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment
title_full_unstemmed	Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment
title_sort	recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment
publisher	al-Farabi Kazakh National University
publishDate	2021
url	https://doaj.org/article/5a09d733f26e419f9b44e1d18a2c859f
work_keys_str_mv	AT mehmetdenizturan recoveryofzincfromcoppersmelterslagbysulfuricacidleachinginanaqueousandalcoholicenvironment AT galymzhanakaramyrzayev recoveryofzincfromcoppersmelterslagbysulfuricacidleachinginanaqueousandalcoholicenvironment AT rashidknadirov recoveryofzincfromcoppersmelterslagbysulfuricacidleachinginanaqueousandalcoholicenvironment
_version_	1718406684306571264

Recovery of zinc from copper smelter slag by sulfuric acid leaching in an aqueous and alcoholic environment

Ejemplares similares