Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/6048
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Type: Artigo de Periódico
Issue Date: Dec-2013
Authors: HILDEBRANDO, Edemarino Araujo
SOUZA, José Antônio da Silva
ANGÉLICA, Rômulo Simões
NEVES, Roberto de Freitas
Title: Application of bauxite waste from amazon region in the heavy clay industry
Citation: HILDEBRANDO, Edemarino Araujo et al. Application of bauxite waste from amazon region in the heavy clay industry. Materials Research, São Carlos, v. 16, n. 6, p. 1418-1422, dez. 2013. Disponível em: <http://www.scielo.br/pdf/mr/v16n6/aop_160112.pdf>. Acesso em: 30 jul. 2014. <http://dx.doi.org/10.1590/S1516-14392013005000145>.
Abstract: In this work, a method was developed for the application of red mud, an alkaline leaching waste, from a bauxite processing plant located in northern Brazil (Amazon region) as starting material for heavy clay products. Samples were prepared by pressing blends of red mud and clay, which were then fired at temperatures from 900 ºC to 1190 ºC. Characterization was carried out by chemical analysis, differential thermal analysis (DTA) and X-ray diffraction (XRD), and the following ceramic properties were evaluated: water absorption, linear shrinkage and flexural strength. In order to evaluate the Na+ stability in the dense ceramic, leaching tests were also carried out on the specimens after sintering process. Results indicated that samples with 50 and 70 wt% of red mud are proper for being used in the production of ceramic bodies, due to its excellent properties, mainly high mechanical resistance and low water absorption, showing thus, an option to minimizing the environmental impacts caused by the aluminum industry.
Keywords: Síntese
Bauxita
Resíduo de bauxita
Lama vermelha
Cerâmica
Pará - Estado
Amazônia Brasileira
ISSN: 1516-1439
Appears in Collections:Artigos Científicos - FAGEO/IG
Artigos Científicos - FEQ/ITEC

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