ULISSES SOARES DO PRADO
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Resumo IPEN-doc 25499 Effects of red mud on properties of red ceramics2018 - BABISK, M.P.; AMARAL, L.F.; RIBEIRO, L.S.; PRADO, U.S.; MONTEIRO, S.N.; VIEIRA, C.M.F.Alumina is obtained through the chemical processing of bauxite, known as Bayer process. During this process an insoluble residue denominated red mud is generated. In addition to silica, red mud has high levels of iron, sodium, calcium and other elements that can add important characteristics to ceramic products. In this sense, this work had the objective of evaluating the effect of utilization of red mud as raw material to traditional ceramic production. As raw materials, besides the red mud, two clays suitable for ceramic products manufacturing were used. The raw materials were submitted to physical, chemical, mineralogical and morphological characterization. The specimens were prepared by uniaxial pressing and sintered in temperatures at 850, 950 and 1050 °C. The relative dry density, firing linear shrinkage, water absorption and mechanical resistance were evaluated. It was demonstrated the real potential that this ceramic segment has in attempt to provide a technical and environmentally correct solution for utilization of red mud as raw material.Resumo IPEN-doc 25493 Soda lime silica glasses obtained from industrial solid wastes2018 - ARAUJO, M.S.; PRADO, U.S.; GENOVA, L.A.In this work, soda-lime glasses were produced using industrial solid wastes such as rice husk ash (RHA) and spent catalyst at the Petrochemical Fluid Catalytic Cracking units (ECAT) as alternative raw materials for silica (SiO2) and alumina (Al2O3). These correspond to two particularly valuable solid wastes, which are not well explored in the viewpoint of glass production. For the fabrication of vitreous samples we have also used, besides the wastes, commercial sodium carbonate and lime. Soda-lime glass containing the wastes was prepared by melting in alumina crucibles at 1600°C for 1 hour. Annealing treatments were performed for 3 hours at 530°C and then cooled to room temperature inside the furnace. The glass samples were characterized using XRF, XRD, ATG and visible spectrometer. The color measurement by (CIE) chromaticity diagram and optical transmission showed a good optical transparency of the glass samples, which confirmed the total vitrification. The results demonstrate that both can be used in their raw form (without treatment) replacing important raw materials, sources of Al2O3 and SiO2, essential for glass formation. The samples obtained presented amber color due to the presence of nickel (Ni²+ ion) from ECAT. Thus, the obtained glass is suitable for applications requiring low light transmittance such as colored glasses containers in general, which does not require complete visibility and transparency.Artigo IPEN-doc 23588 Utilização de resíduos de catalisador (ECAT) e cinzas da casca de arroz (CCA) na elaboração de vidros silicatos soda-cal destinados ao setor de embalagem2016 - ARAUJO, M.S.; MARTINELLI, J.R.; GENOVA, L.A.; PRADO, U.S. doStudy on the use of rice husk ash (RHA) and waste catalyst (ECAT), two industrial solid waste generated in large quantities in Brazil, getting soda-lime glass for the production of packaging. Both the waste may be classified as class II waste according to NBR 10,004. Samples were produced adding Na2CO3 and CaO to obtain a composition within the range of commercial soda-lime glasses. The results showed that both can be used as received (without any previous treatment) replacing important raw materials, source of Al2O3 and SiO2, necessary for glass formation. The produced samples were amber due to the presence of nickel (Ni2+ ions) from the ECAT and optical transmittance of 18%. These also showed good homogeneity, i.e., absence of bubbles and striae and dissolution rate higher than a commercial soda-lime glass. In general, the samples are presented suitable for applications that require low transmittance such as colored glass containers, which does not require perfect visibility and transparency. Finally, the waste level of incorporation was approximately 78 mass%.Resumo IPEN-doc 22164 Use of rice rusk ash and spent catalyst as a source of raw material for the production and characterization of soda-lime silicate glasses destined for packaging2015 - ARAUJO, MARIANA S.; GENOVA, LUIS A.; PRADO, ULISSES S. doArtigo IPEN-doc 21528 Desenvolvimento de fritas cerâmicas usando o resíduo do catalisador de petroquímica (Ecat) como matéria prima2015 - PRADO, ULISSES S. do; MARTINELLI, JOSE R.; SOUZA, JULIANA P. de; ARAUJO, MARIANA S. de; SILVA, LUCIANO L.Artigo IPEN-doc 21517 Estudo e caracterização de resíduos sólidos industriais utilizados como matéria-prima para a obtenção vidros silicatos soda-cal2015 - ARAUJO, M.S.; GENOVA, L.A.; PRADO, U.S. doArtigo IPEN-doc 20335 Influência da incorporação de resíduos de petroquímica na resistência química de fritas e vidrados2014 - PRADO, ULISSES S. do; MARTINELLI, JOSE R.; SOUZA, JULIANA P. de; VIEIRA, HEVELINE; SILVA, LUCIANO L.; SOUZA, JOSE A. da S. eArtigo IPEN-doc 18156 Utilização do refugo de catalisador usado nas unidades petroquimicas de craqueamento catalítico fluído (FCC) na composição de fritas cerâmicas2011 - PRADO, ULISSES S. do; MARTINELLI, JOSE R.; SOUZA, JOSE A. da S. e; SILVA, LUCIANO L.Artigo IPEN-doc 13347 Utilizacao do residuo gerado na demolicao de cubas eletroliticas de producao de aluminio na fabricacao de vidros: (II) obtencao de vidros opacos2008 - PRADO, ULISSES S. do; MARTINELLI, JOSE R.; BRESSIANI, JOSE C.Artigo IPEN-doc 13346 Utilizacao do residuo gerado na demolicao de cubas eletroliticas de producao de aluminio na fabricacao de vidros: (III) obtencao de fritas para revestimentos2008 - PRADO, ULISSES S. do; SILVA, LUCIANO L.; MARTINELLI, JOSE R.; BRESSIANI, J.C.