Statistical design for recycling kaolin processing waste in the manufacturing of mullite-based ceramics

• Autor(a) principal: Menezes,Romualdo Rodrigues
• Data de Publicação: 2009
• Outros Autores: Brasileiro,Maria Isabel, Gonçalves,Wherllyson Patricio, Santana,Lisiane Navarro de Lima, Neves,Gelmires Araújo, Ferreira,Heber Sivini, Ferreira,Heber Carlos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Materials research (São Carlos. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392009000200015
• topic: recycling; waste materials; design of mixture experiments; mullite

Mineral extraction and processing industries have been cited as sources of environmental contamination and pollution. However, waste recycling represents an alternative recovery option, which is interesting from an environmental and economic standpoint. In this work, recycling of kaolin processing waste in the manufacture of mullite-based ceramics was investigated based on the statistical design of mixture experiments methodology. Ten formulations using kaolin processing waste, alumina and ball clay were used in the experiment design. Test specimens were fired and characterized to determine their water absorption and modulus of rupture. Regression models were calculated, relating the properties with the composition. The significance and validity of the models were confirmed through statistical analysis and verification experiments. The regression models were used to analyze the influence of waste content on the properties of the fired bodies. The results indicated that the statistical design of mixture experiments methodology can be successfully used to optimize formulations containing large amount of wastes.