Exergy cost of mineral resources
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.9/388 |
Resumo: | Mineral deposits are considered as natural capital whose value can be assessed in exergy terms. Historical industry experience provides evidence that exploitation of mineral deposits and the beneficiation of ores are essentially energy intensive. The persisting decline of the grade of the developed deposits demands increasing exergy replacement and processing costs. The results demonstrate how far processed ores and concentrates are from ideal behaviour, and technologies from reversibility conditions. The exploitation of mineral resources of declining quality for mineral commodities imply a long time trend of increasing mass and exergy inputs spent per unit product output, in line with a law of ‘diminishing returns’ on invested exergy. |
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Exergy cost of mineral resourcesExergy entropyEntropyMineral resourcesOre gradeRecovery ratioConcentrationMineral deposits are considered as natural capital whose value can be assessed in exergy terms. Historical industry experience provides evidence that exploitation of mineral deposits and the beneficiation of ores are essentially energy intensive. The persisting decline of the grade of the developed deposits demands increasing exergy replacement and processing costs. The results demonstrate how far processed ores and concentrates are from ideal behaviour, and technologies from reversibility conditions. The exploitation of mineral resources of declining quality for mineral commodities imply a long time trend of increasing mass and exergy inputs spent per unit product output, in line with a law of ‘diminishing returns’ on invested exergy.Repositório do LNEGRosa, Rui NamoradoRosa, Diogo R. N.2009-11-13T17:38:12Z2008-01-01T00:00:00Z2008-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/388engRosa, Rui Namorado; Rosa, Diogo R. N. Exergy cost of mineral resources. In: International Journal of Exergy, Vol. 5, nºs 5-6, 2008, p.535-555.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T12:24:33Zoai:repositorio.lneg.pt:10400.9/388Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:33:20.995275Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Exergy cost of mineral resources |
title |
Exergy cost of mineral resources |
spellingShingle |
Exergy cost of mineral resources Rosa, Rui Namorado Exergy entropy Entropy Mineral resources Ore grade Recovery ratio Concentration |
title_short |
Exergy cost of mineral resources |
title_full |
Exergy cost of mineral resources |
title_fullStr |
Exergy cost of mineral resources |
title_full_unstemmed |
Exergy cost of mineral resources |
title_sort |
Exergy cost of mineral resources |
author |
Rosa, Rui Namorado |
author_facet |
Rosa, Rui Namorado Rosa, Diogo R. N. |
author_role |
author |
author2 |
Rosa, Diogo R. N. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Rosa, Rui Namorado Rosa, Diogo R. N. |
dc.subject.por.fl_str_mv |
Exergy entropy Entropy Mineral resources Ore grade Recovery ratio Concentration |
topic |
Exergy entropy Entropy Mineral resources Ore grade Recovery ratio Concentration |
description |
Mineral deposits are considered as natural capital whose value can be assessed in exergy terms. Historical industry experience provides evidence that exploitation of mineral deposits and the beneficiation of ores are essentially energy intensive. The persisting decline of the grade of the developed deposits demands increasing exergy replacement and processing costs. The results demonstrate how far processed ores and concentrates are from ideal behaviour, and technologies from reversibility conditions. The exploitation of mineral resources of declining quality for mineral commodities imply a long time trend of increasing mass and exergy inputs spent per unit product output, in line with a law of ‘diminishing returns’ on invested exergy. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-01-01T00:00:00Z 2008-01-01T00:00:00Z 2009-11-13T17:38:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.9/388 |
url |
http://hdl.handle.net/10400.9/388 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Rosa, Rui Namorado; Rosa, Diogo R. N. Exergy cost of mineral resources. In: International Journal of Exergy, Vol. 5, nºs 5-6, 2008, p.535-555. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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