utilização do subproduto da recuperação metálica de escórias de aços inoxidáveis na síntese de pigmentos cerâmicos; caracterização da matéria-prima by-product utilization of metallic recovering of stainless steel slags in the ceramic pigments synthesis; raw material characterization

Clicks: 271
ID: 205394
2005
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Abstract
O processo de recuperação metálica em escórias de aciaria - resíduo gerado em grande quantidade no processo de refino do ferro-gusa para obtenção do aço - que visa a recuperação de metais nobres, gera uma massa de óxidos que pode ser utilizada como fonte precursora na síntese do pigmento cerâmico verde vitória. Verde vitória é o nome dado ao pigmento cerâmico à base de cálcio, cromo e silício (Ca3Cr2Si3O12 ) que a elevadas temperaturas desenvolve a estrutura cristalina uvarovita responsável pela estabilização da cor verde característica. Este subproduto apresenta características constitucionais favoráveis à obtenção deste pigmento mediante o ajuste da composição química através da adição de óxidos puros. A combinação de técnicas de análise microestrutural, térmica e química foi utilizada nesta caracterização inicial.
The metallic recovering process of steel industry slags - waste produced in a big amount by the process of pig iron refining for steel obtainment, which aims the recovering of noble metals, produces a oxide mass that can be used as a precursor source for the synthesis of the Victory Green ceramic pigment. Victory Green is the name of the ceramic pigment based on calcium, chromium and silicon (Ca3Cr2Si3O12 ), and that develops the uvarovite crystalline structure in high temperatures, responsible for the stabilization of characteristic green color. This by-product presents favorable constitutional characteristics to the obtainment of this pigment by adjusting the chemical composition through additions of pure oxides. The combination of techniques of microstructural, thermal and chemical analysis was used in this initial characterization.
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Authors V. P. Della, J. A. Junkes, I. Kuhn, H. G. Hiella, D. Hotza
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Journal Zootaxa
Year 2005
DOI
10.1590/S0366-69132005000200007
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132005000200007
Keywords
civil engineering (general)

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