Recycling of an electric arc furnace flue dust to obtain high grade ZnO

The production of steel in electric arc furnace (EAF) generates a by-product called EAF dusts. These steelmaking flue dusts are classified in most industrialized countries as hazardous residues because the heavy metals contained in them, tend to leach under slightly acidic rainfall conditions. Howev...

ver descrição completa

Detalhes bibliográficos
Autores: Ruíz, Oscar, Clemente, Carmen, Alonso Gámez, Manuel, Alguacil, Francisco José
Tipo de documento: artigo
Data de publicação:2007
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/36443
Acesso em linha:http://hdl.handle.net/10261/36443
Access Level:Acceso aberto
Palavra-chave:Electric arc furnace dust
Zinc oxide
Ammonium carbonate leaching
Recycling
id ES_cc98d71227064de856db014b4c7f8d12
oai_identifier_str oai:digital.csic.es:10261/36443
network_acronym_str ES
network_name_str España
repository_id_str
spelling Recycling of an electric arc furnace flue dust to obtain high grade ZnORuíz, OscarClemente, CarmenAlonso Gámez, ManuelAlguacil, Francisco JoséElectric arc furnace dustZinc oxideAmmonium carbonate leachingRecyclingThe production of steel in electric arc furnace (EAF) generates a by-product called EAF dusts. These steelmaking flue dusts are classified in most industrialized countries as hazardous residues because the heavy metals contained in them, tend to leach under slightly acidic rainfall conditions. However, and at the same time they contain zinc species which can be used as a source to obtain valuable by-products. The present investigation shows results on the processing of an EAF flue dust using ammonium carbonate solutions. Once zinc is dissolved: ZnO + 4NH3 +H2O → Zn(NH3)4 2+ +2OH− with other impurities (i.e. cadmium and copper), these are eliminated from the zinc solution via cementation with metallic zinc. The purified zinc solution was evaporated (distilled) until precipitation of a zinc carbonate species, which then was calcined to yield a zinc oxide of a high grade. For the unattacked dust residue from the leaching operation, mainly composed of zinc ferrite, several options can be considered: back-recycling to the furnace, further treatment by sodium hydroxide processing or a more safely dumping due to its relatively inertness.Authors thank to CAM (Comunidad de Madrid, Spain) for Project 07/0065/2002. Also to Mr. Bascones and Mr. L´opez for technical assistance.Peer reviewedElsevier201120112007info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/36443reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.jhazmat.2006.06.079info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/364432026-05-22T06:33:51Z
dc.title.none.fl_str_mv Recycling of an electric arc furnace flue dust to obtain high grade ZnO
title Recycling of an electric arc furnace flue dust to obtain high grade ZnO
spellingShingle Recycling of an electric arc furnace flue dust to obtain high grade ZnO
Ruíz, Oscar
Electric arc furnace dust
Zinc oxide
Ammonium carbonate leaching
Recycling
title_short Recycling of an electric arc furnace flue dust to obtain high grade ZnO
title_full Recycling of an electric arc furnace flue dust to obtain high grade ZnO
title_fullStr Recycling of an electric arc furnace flue dust to obtain high grade ZnO
title_full_unstemmed Recycling of an electric arc furnace flue dust to obtain high grade ZnO
title_sort Recycling of an electric arc furnace flue dust to obtain high grade ZnO
dc.creator.none.fl_str_mv Ruíz, Oscar
Clemente, Carmen
Alonso Gámez, Manuel
Alguacil, Francisco José
author Ruíz, Oscar
author_facet Ruíz, Oscar
Clemente, Carmen
Alonso Gámez, Manuel
Alguacil, Francisco José
author_role author
author2 Clemente, Carmen
Alonso Gámez, Manuel
Alguacil, Francisco José
author2_role author
author
author
dc.subject.none.fl_str_mv Electric arc furnace dust
Zinc oxide
Ammonium carbonate leaching
Recycling
topic Electric arc furnace dust
Zinc oxide
Ammonium carbonate leaching
Recycling
description The production of steel in electric arc furnace (EAF) generates a by-product called EAF dusts. These steelmaking flue dusts are classified in most industrialized countries as hazardous residues because the heavy metals contained in them, tend to leach under slightly acidic rainfall conditions. However, and at the same time they contain zinc species which can be used as a source to obtain valuable by-products. The present investigation shows results on the processing of an EAF flue dust using ammonium carbonate solutions. Once zinc is dissolved: ZnO + 4NH3 +H2O → Zn(NH3)4 2+ +2OH− with other impurities (i.e. cadmium and copper), these are eliminated from the zinc solution via cementation with metallic zinc. The purified zinc solution was evaporated (distilled) until precipitation of a zinc carbonate species, which then was calcined to yield a zinc oxide of a high grade. For the unattacked dust residue from the leaching operation, mainly composed of zinc ferrite, several options can be considered: back-recycling to the furnace, further treatment by sodium hydroxide processing or a more safely dumping due to its relatively inertness.
publishDate 2007
dc.date.none.fl_str_mv 2007
2011
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/36443
url http://hdl.handle.net/10261/36443
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.jhazmat.2006.06.079
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869419734317924352
score 15,812429

Registros relacionados