Optimization of water leaching of chlorides from aluminum salt slag
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/249713 |
Resumo: | Aluminum recycling generates large amounts of hazardous wastes, known as salt slags, consisting mainly of oxides, metallic aluminum, and salt fluxes. Water leaching is a common technique used for salt removal, being a decisive operation due to water usage and the need to achieve sufficient salt recovery. In this study, water leaching tests under varied operational conditions (water type, slag particle size, solid content, and leaching time) were carried out in salt slag samples obtained from a Brazilian aluminum scrap melting company. Leaching efficiency was assessed by the % chlorine leached. The optimal leaching condition, defined as the one that resulted in the highest chloride removal from the slag together with appropriate operational conditions (larger viable slag size, lower leaching time, etc.), was identified for a slag size below 2.8 mm, 30 wt% of solids in pulp, and a leaching time of 90 min. The results showed that it was possible to recover more than 92% of the salts initially contained in the raw slag, resulting in a leached material with less than 2.5% salts. The recovered salt characteristics showed potential for recycling and could be re-mixed to the salt flux used for aluminum melting. The possibility of achieving higher efficiencies and lower water consumption during leaching was also discussed, as was a preliminary flowsheet for salt slag treatment. |
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Teixeira, Artur BressanelliAmbrós, Weslei MonteiroSampaio, Carlos HoffmannRaposo, Fortunato Lucas QuemboBrum, Irineu Antônio Schadach deOliva Moncunill, Josep2022-10-04T05:02:06Z20222075-163Xhttp://hdl.handle.net/10183/249713001150050Aluminum recycling generates large amounts of hazardous wastes, known as salt slags, consisting mainly of oxides, metallic aluminum, and salt fluxes. Water leaching is a common technique used for salt removal, being a decisive operation due to water usage and the need to achieve sufficient salt recovery. In this study, water leaching tests under varied operational conditions (water type, slag particle size, solid content, and leaching time) were carried out in salt slag samples obtained from a Brazilian aluminum scrap melting company. Leaching efficiency was assessed by the % chlorine leached. The optimal leaching condition, defined as the one that resulted in the highest chloride removal from the slag together with appropriate operational conditions (larger viable slag size, lower leaching time, etc.), was identified for a slag size below 2.8 mm, 30 wt% of solids in pulp, and a leaching time of 90 min. The results showed that it was possible to recover more than 92% of the salts initially contained in the raw slag, resulting in a leached material with less than 2.5% salts. The recovered salt characteristics showed potential for recycling and could be re-mixed to the salt flux used for aluminum melting. The possibility of achieving higher efficiencies and lower water consumption during leaching was also discussed, as was a preliminary flowsheet for salt slag treatment.application/pdfengMinerals [recurso eletrônico]. Basel, SZ. Vol. 12, no. 9 (2022), art. 1141, 15 p.Alumínio : TratamentoLixiviaçãoResíduos perigososSalt slagLeachingAluminumRecyclingHazardous wastesOptimization of water leaching of chlorides from aluminum salt slagEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001150050.pdf.txt001150050.pdf.txtExtracted Texttext/plain59769http://www.lume.ufrgs.br/bitstream/10183/249713/2/001150050.pdf.txtd101c79a762ca4739126edabef38ec9fMD52ORIGINAL001150050.pdfTexto completo (inglês)application/pdf5220611http://www.lume.ufrgs.br/bitstream/10183/249713/1/001150050.pdf286bb88469b9ea5c9210fa27204daa12MD5110183/2497132022-10-05 04:52:17.218659oai:www.lume.ufrgs.br:10183/249713Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-10-05T07:52:17Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Optimization of water leaching of chlorides from aluminum salt slag |
title |
Optimization of water leaching of chlorides from aluminum salt slag |
spellingShingle |
Optimization of water leaching of chlorides from aluminum salt slag Teixeira, Artur Bressanelli Alumínio : Tratamento Lixiviação Resíduos perigosos Salt slag Leaching Aluminum Recycling Hazardous wastes |
title_short |
Optimization of water leaching of chlorides from aluminum salt slag |
title_full |
Optimization of water leaching of chlorides from aluminum salt slag |
title_fullStr |
Optimization of water leaching of chlorides from aluminum salt slag |
title_full_unstemmed |
Optimization of water leaching of chlorides from aluminum salt slag |
title_sort |
Optimization of water leaching of chlorides from aluminum salt slag |
author |
Teixeira, Artur Bressanelli |
author_facet |
Teixeira, Artur Bressanelli Ambrós, Weslei Monteiro Sampaio, Carlos Hoffmann Raposo, Fortunato Lucas Quembo Brum, Irineu Antônio Schadach de Oliva Moncunill, Josep |
author_role |
author |
author2 |
Ambrós, Weslei Monteiro Sampaio, Carlos Hoffmann Raposo, Fortunato Lucas Quembo Brum, Irineu Antônio Schadach de Oliva Moncunill, Josep |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Teixeira, Artur Bressanelli Ambrós, Weslei Monteiro Sampaio, Carlos Hoffmann Raposo, Fortunato Lucas Quembo Brum, Irineu Antônio Schadach de Oliva Moncunill, Josep |
dc.subject.por.fl_str_mv |
Alumínio : Tratamento Lixiviação Resíduos perigosos |
topic |
Alumínio : Tratamento Lixiviação Resíduos perigosos Salt slag Leaching Aluminum Recycling Hazardous wastes |
dc.subject.eng.fl_str_mv |
Salt slag Leaching Aluminum Recycling Hazardous wastes |
description |
Aluminum recycling generates large amounts of hazardous wastes, known as salt slags, consisting mainly of oxides, metallic aluminum, and salt fluxes. Water leaching is a common technique used for salt removal, being a decisive operation due to water usage and the need to achieve sufficient salt recovery. In this study, water leaching tests under varied operational conditions (water type, slag particle size, solid content, and leaching time) were carried out in salt slag samples obtained from a Brazilian aluminum scrap melting company. Leaching efficiency was assessed by the % chlorine leached. The optimal leaching condition, defined as the one that resulted in the highest chloride removal from the slag together with appropriate operational conditions (larger viable slag size, lower leaching time, etc.), was identified for a slag size below 2.8 mm, 30 wt% of solids in pulp, and a leaching time of 90 min. The results showed that it was possible to recover more than 92% of the salts initially contained in the raw slag, resulting in a leached material with less than 2.5% salts. The recovered salt characteristics showed potential for recycling and could be re-mixed to the salt flux used for aluminum melting. The possibility of achieving higher efficiencies and lower water consumption during leaching was also discussed, as was a preliminary flowsheet for salt slag treatment. |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-10-04T05:02:06Z |
dc.date.issued.fl_str_mv |
2022 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/249713 |
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2075-163X |
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001150050 |
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http://hdl.handle.net/10183/249713 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Minerals [recurso eletrônico]. Basel, SZ. Vol. 12, no. 9 (2022), art. 1141, 15 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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