An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content

Mining extraction operations generate a large number of tailings that contain different mineral phases such as quartz (principally), complex silicates, metallic elements, etc. Tailings impose a serious concern as it is possible to have acid mine drainage potential, leaching, and percolation events o...

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Autores principales:	Cristian Salazar, Lina Uribe
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	tailings flotation ceramic foams sintering time circular economy Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/cb7e5b9a79604f6eb10faa7bb256bb6f
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spelling	oai:doaj.org-article:cb7e5b9a79604f6eb10faa7bb256bb6f2021-11-25T18:50:12ZAn Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content10.3390/pr91118972227-9717https://doaj.org/article/cb7e5b9a79604f6eb10faa7bb256bb6f2021-10-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1897https://doaj.org/toc/2227-9717Mining extraction operations generate a large number of tailings that contain different mineral phases such as quartz (principally), complex silicates, metallic elements, etc. Tailings impose a serious concern as it is possible to have acid mine drainage potential, leaching, and percolation events of heavy metals into the environment under certain conditions. The objective of this work was to evaluate the technical feasibility of producing ceramic foams from gold and silver tailings with high sulfide gangue through a previous flotation process to eliminate impurities associated to this gangue, as it can produce SO<sub>2</sub> in the foaming process, and to analyze the effect of the sintering time and the temperature on the characteristics of foams obtained with this type of waste. The results showed that the inverse flotation reduced the presence of impurities associated to sulfides. In addition, it was possible to observe that in the absence of a foaming agent, it was possible to obtain ceramic foams with an apparent density and a mechanical strength near to 1.0 g/cm<sup>3</sup> and 0.5 MPa, respectively, when a higher sintering temperature and time were used. On the other hand, the presence of the foaming agent reduced the apparent density to 0.5 g/cm<sup>3</sup> without decreasing to a great extent the mechanical strength of ceramic foams at lower sintering temperatures.Cristian SalazarLina UribeMDPI AGarticletailingsflotationceramic foamssintering timecircular economyChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1897, p 1897 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	tailings flotation ceramic foams sintering time circular economy Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	tailings flotation ceramic foams sintering time circular economy Chemical technology TP1-1185 Chemistry QD1-999 Cristian Salazar Lina Uribe An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content
description	Mining extraction operations generate a large number of tailings that contain different mineral phases such as quartz (principally), complex silicates, metallic elements, etc. Tailings impose a serious concern as it is possible to have acid mine drainage potential, leaching, and percolation events of heavy metals into the environment under certain conditions. The objective of this work was to evaluate the technical feasibility of producing ceramic foams from gold and silver tailings with high sulfide gangue through a previous flotation process to eliminate impurities associated to this gangue, as it can produce SO<sub>2</sub> in the foaming process, and to analyze the effect of the sintering time and the temperature on the characteristics of foams obtained with this type of waste. The results showed that the inverse flotation reduced the presence of impurities associated to sulfides. In addition, it was possible to observe that in the absence of a foaming agent, it was possible to obtain ceramic foams with an apparent density and a mechanical strength near to 1.0 g/cm<sup>3</sup> and 0.5 MPa, respectively, when a higher sintering temperature and time were used. On the other hand, the presence of the foaming agent reduced the apparent density to 0.5 g/cm<sup>3</sup> without decreasing to a great extent the mechanical strength of ceramic foams at lower sintering temperatures.
format	article
author	Cristian Salazar Lina Uribe
author_facet	Cristian Salazar Lina Uribe
author_sort	Cristian Salazar
title	An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content
title_short	An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content
title_full	An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content
title_fullStr	An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content
title_full_unstemmed	An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content
title_sort	alternative method for the obtention of ceramic foams from gold and silver tailings with high pyrite content
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/cb7e5b9a79604f6eb10faa7bb256bb6f
work_keys_str_mv	AT cristiansalazar analternativemethodfortheobtentionofceramicfoamsfromgoldandsilvertailingswithhighpyritecontent AT linauribe analternativemethodfortheobtentionofceramicfoamsfromgoldandsilvertailingswithhighpyritecontent AT cristiansalazar alternativemethodfortheobtentionofceramicfoamsfromgoldandsilvertailingswithhighpyritecontent AT linauribe alternativemethodfortheobtentionofceramicfoamsfromgoldandsilvertailingswithhighpyritecontent
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An Alternative Method for the Obtention of Ceramic Foams from Gold and Silver Tailings with High Pyrite Content

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