Behaviour of biofuel addition on metallurgical properties of sinter
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Data
2009-07-01
Autores
Silva, S. N.
Vernilli, F.
Pinatti, D. G.
do Nascimento, V. F.
Saito, E. [UNESP]
Cangani, M. P.
Neves, E. S.
Longo, Elson [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Maney Publishing
Resumo
Blast furnace gas yield is essentially controlled by a gas-solid reaction phenomenon, which strongly influences hot metal manufacturing costs. As a result of rising prices for reducing agents on the international market, Companhia Siderurgica Nacional decided to inject natural gas into its blast furnaces. With more gas inside the furnace, the burden permeability became even more critical. To improve blast furnace gas yield, a new technological approach was adopted; raising the metallic burden reaction surface. To that end, a special sinter was developed with permeability being controlled by adding micropore nucleus forming agents, cellulignin coal, without, however, degrading its mechanical properties. This paper shows the main process parameters and the results from physicochemical characterisation of a sinter with controlled permeability, on a pilot scale, compared to those of conventional sinter. Gas flow laboratory simulations have conclusively corroborated the positive effects of micropore nucleus forming agents on enhancing sinter permeability.
Descrição
Palavras-chave
Sinter, Permeability, Cellulignin
Como citar
Ironmaking & Steelmaking. Leeds: Maney Publishing, v. 36, n. 5, p. 333-340, 2009.