Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace

Detalhes bibliográficos
Autor(a) principal: Gomes, Maria de Lourdes Ilha
Data de Publicação: 2006
Outros Autores: Osorio, Eduardo, Vilela, Antonio Cezar Faria
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/20330
Resumo: Pulverized Coal Injection (PCI) is an important standard technology replacing coke partially by pulverized coal into the blast furnace that allows a significant reduction of hot metal costs and environmental impact, contributing to a decrease of coke requirements for ironmaking. Coals typically used in this process in Brazil are, at current time, exclusively imported from many countries, although economic important coal-measures occur in the southern part of the country. The Brazilian coals have a low rank, higher contents of inert components, proportioning nocoking properties and an expected high reactivity. Due to these caractheristics, these coals could be used for injection in the blast furnaces in order to decrease the dependency on high cost imported coals. The efficiency in the combustion and the coal reactivity are considered important parameters in the blast furnace, since a larger amount of char (unburned coal) causes severe problems to the furnace operation. The aim of the present work is to compare the reactivity of a south Brazilian coal, obtained from Faxinal mine, with two imported coals and the blends of the Brazilian coal with the imported ones. The reactivity of these coals and their blends were evaluated in a thermogravimetric analyzer. In the experiments, various mass ratios of Faxinal coal and the imported coals were used to compose the blends. The gasification reaction with pure CO2 was conducted under isothermal conditions at 1050 °C and atmospheric pressure. The experimental results show the greater reactivity of the Faxinal coal. The additive behavior was confirmed. The blends with a composition of up to 50% Faxinal coal have parameters according to the usual limits used for PCI.
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spelling Gomes, Maria de Lourdes IlhaOsorio, EduardoVilela, Antonio Cezar Faria2010-04-16T09:14:08Z20061516-1439http://hdl.handle.net/10183/20330000592670Pulverized Coal Injection (PCI) is an important standard technology replacing coke partially by pulverized coal into the blast furnace that allows a significant reduction of hot metal costs and environmental impact, contributing to a decrease of coke requirements for ironmaking. Coals typically used in this process in Brazil are, at current time, exclusively imported from many countries, although economic important coal-measures occur in the southern part of the country. The Brazilian coals have a low rank, higher contents of inert components, proportioning nocoking properties and an expected high reactivity. Due to these caractheristics, these coals could be used for injection in the blast furnaces in order to decrease the dependency on high cost imported coals. The efficiency in the combustion and the coal reactivity are considered important parameters in the blast furnace, since a larger amount of char (unburned coal) causes severe problems to the furnace operation. The aim of the present work is to compare the reactivity of a south Brazilian coal, obtained from Faxinal mine, with two imported coals and the blends of the Brazilian coal with the imported ones. The reactivity of these coals and their blends were evaluated in a thermogravimetric analyzer. In the experiments, various mass ratios of Faxinal coal and the imported coals were used to compose the blends. The gasification reaction with pure CO2 was conducted under isothermal conditions at 1050 °C and atmospheric pressure. The experimental results show the greater reactivity of the Faxinal coal. The additive behavior was confirmed. The blends with a composition of up to 50% Faxinal coal have parameters according to the usual limits used for PCI.application/pdfengMaterials research : ibero-american journal of materials. São Carlos, SP. vol. 9, no. 1 (jan./mar. 2006), p. 91-95CarvãoAlto-fornoReatividade do carvãoPulverized coal injectionCoal blendsReactivity and thermobalanceThermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnaceinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000592670.pdf000592670.pdfTexto completo (inglês)application/pdf255816http://www.lume.ufrgs.br/bitstream/10183/20330/1/000592670.pdf820badc558e45654f121fb161eac49d4MD51TEXT000592670.pdf.txt000592670.pdf.txtExtracted Texttext/plain25746http://www.lume.ufrgs.br/bitstream/10183/20330/2/000592670.pdf.txt75d53c80c958d20512503a0ca4a27cf0MD52THUMBNAIL000592670.pdf.jpg000592670.pdf.jpgGenerated Thumbnailimage/jpeg1788http://www.lume.ufrgs.br/bitstream/10183/20330/3/000592670.pdf.jpg69616dc9387df342edcf7020d2dcc5f0MD5310183/203302022-04-20 04:55:31.358556oai:www.lume.ufrgs.br:10183/20330Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-04-20T07:55:31Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
title Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
spellingShingle Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
Gomes, Maria de Lourdes Ilha
Carvão
Alto-forno
Reatividade do carvão
Pulverized coal injection
Coal blends
Reactivity and thermobalance
title_short Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
title_full Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
title_fullStr Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
title_full_unstemmed Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
title_sort Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
author Gomes, Maria de Lourdes Ilha
author_facet Gomes, Maria de Lourdes Ilha
Osorio, Eduardo
Vilela, Antonio Cezar Faria
author_role author
author2 Osorio, Eduardo
Vilela, Antonio Cezar Faria
author2_role author
author
dc.contributor.author.fl_str_mv Gomes, Maria de Lourdes Ilha
Osorio, Eduardo
Vilela, Antonio Cezar Faria
dc.subject.por.fl_str_mv Carvão
Alto-forno
Reatividade do carvão
topic Carvão
Alto-forno
Reatividade do carvão
Pulverized coal injection
Coal blends
Reactivity and thermobalance
dc.subject.eng.fl_str_mv Pulverized coal injection
Coal blends
Reactivity and thermobalance
description Pulverized Coal Injection (PCI) is an important standard technology replacing coke partially by pulverized coal into the blast furnace that allows a significant reduction of hot metal costs and environmental impact, contributing to a decrease of coke requirements for ironmaking. Coals typically used in this process in Brazil are, at current time, exclusively imported from many countries, although economic important coal-measures occur in the southern part of the country. The Brazilian coals have a low rank, higher contents of inert components, proportioning nocoking properties and an expected high reactivity. Due to these caractheristics, these coals could be used for injection in the blast furnaces in order to decrease the dependency on high cost imported coals. The efficiency in the combustion and the coal reactivity are considered important parameters in the blast furnace, since a larger amount of char (unburned coal) causes severe problems to the furnace operation. The aim of the present work is to compare the reactivity of a south Brazilian coal, obtained from Faxinal mine, with two imported coals and the blends of the Brazilian coal with the imported ones. The reactivity of these coals and their blends were evaluated in a thermogravimetric analyzer. In the experiments, various mass ratios of Faxinal coal and the imported coals were used to compose the blends. The gasification reaction with pure CO2 was conducted under isothermal conditions at 1050 °C and atmospheric pressure. The experimental results show the greater reactivity of the Faxinal coal. The additive behavior was confirmed. The blends with a composition of up to 50% Faxinal coal have parameters according to the usual limits used for PCI.
publishDate 2006
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dc.relation.ispartof.pt_BR.fl_str_mv Materials research : ibero-american journal of materials. São Carlos, SP. vol. 9, no. 1 (jan./mar. 2006), p. 91-95
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