Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse

Detalhes bibliográficos
Autor(a) principal: Trampus,Bruna Camara
Data de Publicação: 2019
Outros Autores: França,Silvia Cristina Alves
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=S2448-167X2019000300301
Resumo: Abstract Mining activities worldwide are subject to serious geotechnical accidents involving tailings dams. Therefore, many studies have focused on tailings dewatering before their deposition. This article studies the rheological properties of flocculated and thickened nickel tailings in order to determine the effect of the initial solid concentration and type of rheology modifying agents (two anionic polymeric flocculants) on their stability for disposal in dams. The sediment was submitted to rheological tests, with the vane technique, and slump tests, to obtain information about static and dynamic yield stress and slump height, respectively. The results showed a strong influence of the initial solid concentration and the polymeric flocculant on the particle aggregation. Both particle cohesion and yield stress of the sediment increased, reaching static yield stress of around 1,400 Pa. Both flocculants were efficient in thickening by batch sedimentation, allowing water recycling in the range of 70-90% with turbidity less than 100 NTU and the production of sediment with static yield stress much higher than specified for mineral paste.
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spelling Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuserheologyyield stressmineral pastewater recyclingnickel tailingsAbstract Mining activities worldwide are subject to serious geotechnical accidents involving tailings dams. Therefore, many studies have focused on tailings dewatering before their deposition. This article studies the rheological properties of flocculated and thickened nickel tailings in order to determine the effect of the initial solid concentration and type of rheology modifying agents (two anionic polymeric flocculants) on their stability for disposal in dams. The sediment was submitted to rheological tests, with the vane technique, and slump tests, to obtain information about static and dynamic yield stress and slump height, respectively. The results showed a strong influence of the initial solid concentration and the polymeric flocculant on the particle aggregation. Both particle cohesion and yield stress of the sediment increased, reaching static yield stress of around 1,400 Pa. Both flocculants were efficient in thickening by batch sedimentation, allowing water recycling in the range of 70-90% with turbidity less than 100 NTU and the production of sediment with static yield stress much higher than specified for mineral paste.Fundação Gorceix2019-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2019000300301REM - International Engineering Journal v.72 n.2 2019reponame:REM - International Engineering Journalinstname:Fundação Gorceix (FG)instacron:FG10.1590/0370-44672018720117info:eu-repo/semantics/openAccessTrampus,Bruna CamaraFrança,Silvia Cristina Alveseng2019-03-19T00:00:00Zoai:scielo:S2448-167X2019000300301Revistahttps://www.rem.com.br/?lang=pt-brPRIhttps://old.scielo.br/oai/scielo-oai.php||editor@rem.com.br2448-167X2448-167Xopendoar:2019-03-19T00:00REM - International Engineering Journal - Fundação Gorceix (FG)false
dc.title.none.fl_str_mv Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
title Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
spellingShingle Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
Trampus,Bruna Camara
rheology
yield stress
mineral paste
water recycling
nickel tailings
title_short Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
title_full Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
title_fullStr Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
title_full_unstemmed Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
title_sort Rheology applied to the environmental management of mineral tailings: focus on safer disposal and water reuse
author Trampus,Bruna Camara
author_facet Trampus,Bruna Camara
França,Silvia Cristina Alves
author_role author
author2 França,Silvia Cristina Alves
author2_role author
dc.contributor.author.fl_str_mv Trampus,Bruna Camara
França,Silvia Cristina Alves
dc.subject.por.fl_str_mv rheology
yield stress
mineral paste
water recycling
nickel tailings
topic rheology
yield stress
mineral paste
water recycling
nickel tailings
description Abstract Mining activities worldwide are subject to serious geotechnical accidents involving tailings dams. Therefore, many studies have focused on tailings dewatering before their deposition. This article studies the rheological properties of flocculated and thickened nickel tailings in order to determine the effect of the initial solid concentration and type of rheology modifying agents (two anionic polymeric flocculants) on their stability for disposal in dams. The sediment was submitted to rheological tests, with the vane technique, and slump tests, to obtain information about static and dynamic yield stress and slump height, respectively. The results showed a strong influence of the initial solid concentration and the polymeric flocculant on the particle aggregation. Both particle cohesion and yield stress of the sediment increased, reaching static yield stress of around 1,400 Pa. Both flocculants were efficient in thickening by batch sedimentation, allowing water recycling in the range of 70-90% with turbidity less than 100 NTU and the production of sediment with static yield stress much higher than specified for mineral paste.
publishDate 2019
dc.date.none.fl_str_mv 2019-06-01
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=S2448-167X2019000300301
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2019000300301
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0370-44672018720117
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.72 n.2 2019
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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