Adição de resíduo do biodiesel como matéria prima na massa de cerâmica vermelha: obtenção, caracterização das propriedades tecnológicas e aspectos ambientais

Abstract

He study investigated the addition of a residue from biodiesel production, the red clay for obtaining a ceramic body with specified for production of ceramic pieces for use in construction process properties. The residue was used fatty acid generated in the treatment of glycerin step the material was donated by an industry producing biodiesel in the city of Porto Nacional / TO. The clay used as ceramic matrix was drawn from a reservoir of mineral mining from an industry located in Miracema / TO. The residue and clay are characterized for their chemical, mineralogical composition and particle size The influence of the addition of oil to the technological properties of the ceramic bodies produced four formulations were developed with the addition of oil 0%, 0.5% , 1% and 1.5%. The specimens were subjected to firing temperature of 700° C, 800°C, 900°C and 1000°C. The heating rate was 150°C/h, with the level of 6 hours. After the process of burning the bodies of ceramic tests were characterized for their technological properties : water absorption , apparent porosity , linear shrinkage and flexural strength four points and environmental compatibility , where the leaching test recommended by the NBR 10.005; no formulations exceeded the limit set in the test advocated by solubilization NBR 10.006, except aluminum , no other element has exceeded the limit set by NBR 10.004 which establishes the limits for gases emissions, although the Al being set up , all formulations were classified as Class II A - Not Inert . According to the results obtained in this study the addition of the fatty acid in ceramic material is feasible from a technological and environmental perspective, since the suggested percentage respecting and observing the processing parameters indicated (level of temperature and burning) in the investigative study.