Hydrometallurgical extraction of Al and Si from kaolinitic clays

Detalhes bibliográficos
Autor(a) principal: Pinna,Eliana G.
Data de Publicação: 2017
Outros Autores: Suarez,Daniela S., Rosales,Gustavo D., Rodriguez,Mario Humberto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: REM - International Engineering Journal
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2017000400451
Resumo: Abstract Herein is presented the results of a study on the hydrometallurgic extraction and recovery of aluminum and silicon by leaching of kaolinitic clays with HF. The studied extraction parameters were: temperature, reaction time, solid/liquid ratio, concentration, and precipitating agent mass. In the leaching process, mineral dissolutions near 100% were obtained when working at 348 K, solid/liquid ratio 2% w/v, HF 12% v/v, for 120 minutes. The HF leach liquor generated from the dissolution of kaolinitic clays contains H2SiF6and H3AlF6. Studies were conducted to recover the two valuable fluorides as K2SiF6and Na3AlF6by precipitation with alkaline salts from the leach liquor. Phases of precipitated fluorides were identified by XRD and surface morphology by SEM. The purity of the K2SiF6precipitate was 98.8%, whereas for Na3AlF6, it was 89.3%. Also, both synthesized solids are of high commercial value due to their industrial applications.
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spelling Hydrometallurgical extraction of Al and Si from kaolinitic claysextractionkaolinitic claysaluminumsynthesiscryolite.Abstract Herein is presented the results of a study on the hydrometallurgic extraction and recovery of aluminum and silicon by leaching of kaolinitic clays with HF. The studied extraction parameters were: temperature, reaction time, solid/liquid ratio, concentration, and precipitating agent mass. In the leaching process, mineral dissolutions near 100% were obtained when working at 348 K, solid/liquid ratio 2% w/v, HF 12% v/v, for 120 minutes. The HF leach liquor generated from the dissolution of kaolinitic clays contains H2SiF6and H3AlF6. Studies were conducted to recover the two valuable fluorides as K2SiF6and Na3AlF6by precipitation with alkaline salts from the leach liquor. Phases of precipitated fluorides were identified by XRD and surface morphology by SEM. The purity of the K2SiF6precipitate was 98.8%, whereas for Na3AlF6, it was 89.3%. Also, both synthesized solids are of high commercial value due to their industrial applications.Fundação Gorceix2017-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2017000400451REM - International Engineering Journal v.70 n.4 2017reponame:REM - International Engineering Journalinstname:Fundação Gorceix (FG)instacron:FG10.1590/0370-44672017700006info:eu-repo/semantics/openAccessPinna,Eliana G.Suarez,Daniela S.Rosales,Gustavo D.Rodriguez,Mario Humbertoeng2017-09-26T00:00:00Zoai:scielo:S2448-167X2017000400451Revistahttps://www.rem.com.br/?lang=pt-brPRIhttps://old.scielo.br/oai/scielo-oai.php||editor@rem.com.br2448-167X2448-167Xopendoar:2017-09-26T00:00REM - International Engineering Journal - Fundação Gorceix (FG)false
dc.title.none.fl_str_mv Hydrometallurgical extraction of Al and Si from kaolinitic clays
title Hydrometallurgical extraction of Al and Si from kaolinitic clays
spellingShingle Hydrometallurgical extraction of Al and Si from kaolinitic clays
Pinna,Eliana G.
extraction
kaolinitic clays
aluminum
synthesis
cryolite.
title_short Hydrometallurgical extraction of Al and Si from kaolinitic clays
title_full Hydrometallurgical extraction of Al and Si from kaolinitic clays
title_fullStr Hydrometallurgical extraction of Al and Si from kaolinitic clays
title_full_unstemmed Hydrometallurgical extraction of Al and Si from kaolinitic clays
title_sort Hydrometallurgical extraction of Al and Si from kaolinitic clays
author Pinna,Eliana G.
author_facet Pinna,Eliana G.
Suarez,Daniela S.
Rosales,Gustavo D.
Rodriguez,Mario Humberto
author_role author
author2 Suarez,Daniela S.
Rosales,Gustavo D.
Rodriguez,Mario Humberto
author2_role author
author
author
dc.contributor.author.fl_str_mv Pinna,Eliana G.
Suarez,Daniela S.
Rosales,Gustavo D.
Rodriguez,Mario Humberto
dc.subject.por.fl_str_mv extraction
kaolinitic clays
aluminum
synthesis
cryolite.
topic extraction
kaolinitic clays
aluminum
synthesis
cryolite.
description Abstract Herein is presented the results of a study on the hydrometallurgic extraction and recovery of aluminum and silicon by leaching of kaolinitic clays with HF. The studied extraction parameters were: temperature, reaction time, solid/liquid ratio, concentration, and precipitating agent mass. In the leaching process, mineral dissolutions near 100% were obtained when working at 348 K, solid/liquid ratio 2% w/v, HF 12% v/v, for 120 minutes. The HF leach liquor generated from the dissolution of kaolinitic clays contains H2SiF6and H3AlF6. Studies were conducted to recover the two valuable fluorides as K2SiF6and Na3AlF6by precipitation with alkaline salts from the leach liquor. Phases of precipitated fluorides were identified by XRD and surface morphology by SEM. The purity of the K2SiF6precipitate was 98.8%, whereas for Na3AlF6, it was 89.3%. Also, both synthesized solids are of high commercial value due to their industrial applications.
publishDate 2017
dc.date.none.fl_str_mv 2017-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2017000400451
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2017000400451
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0370-44672017700006
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Fundação Gorceix
publisher.none.fl_str_mv Fundação Gorceix
dc.source.none.fl_str_mv REM - International Engineering Journal v.70 n.4 2017
reponame:REM - International Engineering Journal
instname:Fundação Gorceix (FG)
instacron:FG
instname_str Fundação Gorceix (FG)
instacron_str FG
institution FG
reponame_str REM - International Engineering Journal
collection REM - International Engineering Journal
repository.name.fl_str_mv REM - International Engineering Journal - Fundação Gorceix (FG)
repository.mail.fl_str_mv ||editor@rem.com.br
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