Maximization of the use of casting sand residue in the production of fired ceramic bricks

• Autor(a) principal: Paludo, Henrique Luis
• Data de Publicação: 2020
• Outros Autores: Braganca, Saulo Roca
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/242088
• topic: Areia de fundição; Reaproveitamento de resíduos; Cerâmica vermelha : Produção; Foundry; Red clay; Casting sand; Residue

In this study, a red ceramic was developed with the addition of sand residue from deburring and finishing processing of cast iron molds, replacing a variable fraction of the clay. The formulated masses were shaped by pressing and firing at different temperatures (850, 900 and 1000 oC) at a heating rate of 180 oC/h and 2-hour level. The bodies were characterized for their density prior to firing, and after firing, for mechanical strength, linear retraction, water absorption and porosity. From these results, tests were carried out with the purpose of evaluating the possible release of pollutants from the ceramic pieces produced by leaching tests according to Brazilian standards. The use of smelting sand residue, a low plasticity component, has been shown to be feasible with a few adjustments in the processing parameters and environmentally safe, as demonstrated by the experimental results.