incorporação de lama de alto forno em cerâmica vermelha incorporation of blast furnace sludge into red ceramic

Clicks: 273
ID: 136376
2007
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Abstract
Este trabalho tem por objetivo caracterizar um resíduo siderúrgico, a lama de alto forno, e avaliar o efeito da sua incorporação até 20% em peso nas propriedades e na microestrutura de uma massa argilosa. O resíduo foi submetido a ensaios de caracterização mineralógica, química, física e morfológica. Foram preparados corpos de prova por prensagem uniaxial a 20 MPa para queima em forno de laboratório a 900 ºC. As propriedades físicas e mecânicas avaliadas foram: retração linear, absorção de água e tensão de ruptura à flexão. A microestrutura das cerâmicas queimadas foi avaliada por microscopia eletrônica de varredura. Os resultados mostraram que a lama de alto forno é constituída predominantemente de compostos de ferro e de material carbonoso. A granulometria deste resíduo é favorável à incorporação em cerâmica vermelha. Entretanto, o resíduo ocasionou um efeito deletério nas propriedades físicas e mecânicas da cerâmica queimada.
This work has for objective to characterize a steel making plant waste, the blast furnace sludge, and to evaluate the effect of its incorporation, up to 20 wt.%, on the properties and microstructure of a clayey ceramic used for the fabrication of bricks and roofing tiles. The waste was submitted to mineralogical, chemical and physical tests. In order to determine the physical and mechanical properties such as linear shrinkage, water absorption and flexural rupture strength, specimens were prepared by uniaxial mold-press at 20 MPa and then fired in a laboratory furnace at 900 ºC. The microstructure of the fired ceramics was evaluated by scanning electron microscopy. The results showed that the blast furnace sludge is predominantly composed of iron compounds and carbonaceous material. The particle size of the waste is appropriated for its incorporation into red ceramics. However, the waste incorporation resulted in deleterious effect on the physical and mechanical properties on the fired ceramics.
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Authors ;C. M. F. Vieira;C. A. C. M. Dias;A. V. Mothé;R. Sánchez;S. N. Monteiro
Journal Zootaxa
Year 2007
DOI
10.1590/S0366-69132007000400008
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132007000400008
Keywords
Characterization microstructure properties civil engineering (general)

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