Recycling of iron foundry sand and glass waste as raw material for production                 of whiteware

Bragança, Saulo Roca; Vicenzi, Juliane; Guerino, Kareline; Bergmann, Carlos Pérez

doi:10.1177/0734242x06061155

Cited by 39 publications

(30 citation statements)

References 3 publications

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“…To date, SFSs have been successfully been used as aggregate replacement in asphalt [9,10], highway subbases [11], ceramic materials [12,13], manufactured soils [8,14], retaining walls [15], concrete [16,17], highway embankments [18], controlled low-strength materials [19,20], and flowable slurry [21,22].…”

Section: Introductionmentioning

confidence: 99%

Use of an integrated approach to characterize the physicochemical properties of foundry green sands

Carnin¹,

Folgueras

Luvizão

et al. 2012

Thermochimica Acta

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a b s t r a c tA fresh green sand, spent green sand, and a weathered spent green sand (wSGS) from a foundry landfill were analyzed using diffractometry, electron microscopy, fluorometry, granulometry, spectrometry, and thermogravimetry (TG). Our objective was to understand how the physicochemical properties of the foundry green sands change from their original form after being subjected to the casting process, then after weathering at the landfill. A quantitative phase composition model was also postulated for each material based on the TG results and it was found to be the most reliable and informative quantitative data for this type of residue. The weathered sample, that remained in a landfill for two years, was found to be composed of almost pure sand. Because of the weathering process, it may be possible to use the wSGS as a virgin sand replacement in the regeneration system or in geotechnical applications where bentonite would affect the properties of the final product.Published by Elsevier B.V.

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Section: Introductionmentioning

confidence: 99%

Use of an integrated approach to characterize the physicochemical properties of foundry green sands

Carnin¹,

Folgueras

Luvizão

et al. 2012

Thermochimica Acta

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“…Atualmente em virtude das legislações mais exigentes a cerca das questões ambientais e da demanda de mercado por produtos ecologicamente corretos, os fabricantes estão a cada dia mais interessados em desenvolver pesquisas visando reduzir os impactos ambientais da geração de resíduos através de sua reutilização [3]. Por outro lado, o custo crescente com as matérias-primas, motivados pela elevada demanda globais, os danos ambientais provados por sua extração e a escassez de recursos naturais de boa qualidade, vêm motivando também a reciclagem de resíduos industriais como matérias-primas alternativas.…”

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Uso de técnicas estatísticas para modelar a resistência à flexão de corpos cerâmicos contendo resíduo de granito

et al. 2012

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A reciclagem do resíduo da serragem do granito como matéria-prima alternativa em formulações cerâmicas vem sendo muito estudada nos últimos anos. Por outro lado, o uso de ferramentas matemáticas para otimizar o comportamento mecânico de corpos cerâmicos contendo resíduos também vem sendo muito aplicado. Deste modo, o presente trabalho tem como objetivo utilizar técnicas estatísticas aliadas à metodologia de delineamento de mistura para analisar a resistência à flexão de corpos cerâmicos contendo resíduo de granito. Foram estabelecidas composições utilizando um planejamento em rede simplex e foram conformados corpos-de-prova por prensagem uniaxial a 25MPa. Em seguida os corpos de prova foram queimados a 1.000, 1.100 e 1.150 o C. Foi determinado o módulo de ruptura à flexão dos corpos de prova em ensaio de três pontos. Com base nos resultados pode-se concluir que a metodologia de planejamento experimental associada à superfície de resposta é uma ferramenta que possibilita analisar o módulo de ruptura dos corpos cerâmicos frente a adição de resíduo de granito e por conseguinte desenvolver composições com elevados teores de resíduos sem perdas no seu módulo de ruptura.Palavras-chave: Delineamento de mistura, reciclagem, resíduo de granito, resistência mecânica. Use of statistical techniques to model the flexural strength of ceramic bodies containing granite waste ABSTRACTGranite sawing waste recycling as alternative raw material for ceramic formulations has been very much studied in the last years, however it was not observed the use of mathematical tools to understand the mechanical behavior of the ceramic bodies containing waste. Thus, this work used statistical tools associated with the mixture design methodology to model the flexural strength of the ceramic bodies containing granite waste. Compositions were developed using a simplex-lattice design and test samples were obtained by uniaxial pressing. The test samples were fired at 1.000, 1.100 and 1.150 o C and their modulus of rupture was determined in a three point bend test. The results indicated that the statistical design of mixture experiments associated with the response surface is a tool that permits to model the modulus of rupture of the ceramic bodies in relation to the amount of incorporated waste and, consequently, to develop formulations containing high amounts of wastes without the decrease of the modulus of rupture.Keywords: Mixture design, recycling, granite waste, mechanical strength. INTRODUÇÃOO elevado crescimento demográfico e da industrialização, combinados com a falta de planejamento ambiental para um desenvolvimento sustentável, têm gerado milhões de toneladas de resíduos por ano em todo o mundo. Em geral, os processos indústrias geram elevadas quantidades de resíduos que poderiam ser reciclados ou reutilizados, tanto por sua incorporação no processo produtivo original como pela sua utilização como uma matéria-prima alternativa em outros processos industriais [1,2].

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“…There are a lot of examples in literature, such as the recycling of iron foundry sand, waste glass, waste from mineral processing, and so on [1][2][3][4] . By recycling one can reduce the environmental impact of traditional materials exploration, the environmental damages caused by incorrect administration of the tailings, and the risk of environmental accidents whenever residues are stored improperly.…”

Section: Introductionmentioning

confidence: 99%

Investigation of spodumene-bearing rock as a flux for bone china production

Carús

Bragança

2013

Mat. Res.

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The use of a waste from mineral processing, a spodumene-bearing rock, was investigated as a flux for bone china composition, partially replacing feldspar. The effect of lithium oxide in bone china body was favorable for reducing firing temperature. The presence of Li 2 O reacting with other oxides and silicates formed a liquid phase of lower viscosity, which was favorable for densification through viscous flow sintering, and to a higher mechanical strength. It was obtained a large plateau for firing, without deformation on firing (pyroplastic deformation) of parts; which is not an easy task to be achieved in bone china processing. Rheological and casting properties were also investigated. Microstructures of the fired bodies were discussed. They correlated well with the final properties of the parts.

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Recycling of iron foundry sand and glass waste as raw material for production of whiteware

Cited by 39 publications

References 3 publications

Use of an integrated approach to characterize the physicochemical properties of foundry green sands

Use of an integrated approach to characterize the physicochemical properties of foundry green sands

Uso de técnicas estatísticas para modelar a resistência à flexão de corpos cerâmicos contendo resíduo de granito

Investigation of spodumene-bearing rock as a flux for bone china production

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