TCC - Engenharia de Materiais (UACSA)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/2914
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Resultados da Pesquisa
Item Estudo reológico de argilas utilizadas em indústria de revestimento cerâmico do Cabo de Santo Agostinho – PE(2022-05-27) Nascimento, Mayara Suellen da Silva; Diniz, Verônica Cristhina de Souza; http://lattes.cnpq.br/9239037374332331; http://lattes.cnpq.br/4750562951278953Clays are essential components for the production of ceramic coatings, and when they are combined for this purpose, they present different rheological characteristics according to particle size, mineralogical and chemical composition. The present work aims to study the structural, morphological characteristics and the influence of two de-flocculants, sound silicate and sound tripolyphosphate, on the rheology of clay mixtures used in coating coatings. Four clay mixtures were studied with a composition of 50% of four raw materials donated by the coating industryin Cabo de Santo Agostinho – Pernambuco combined with 50% clay also donated by another industry in the sector located in the Northeast region. The clay powders were processed and characterized by X-ray diffraction (XRD) and particle size distribution by laser diffraction. Next, rheology was evaluated by determining deflocculation curves as a function of flow time for clay mixtures in wet suspensions (50% solids). Based on the results, the presence of kaolinite, quartz and mica phases was identified. The morphology of the samples presented different particle size ranges ranging from 0.1 μm to 100 μm. The rheology of the suspensions produced three more viscous samples, with plasticity indices, different from the remaining sample, which presented characteristics of a fluid suspension. None of the clay mixtures indicate thixotropic characteristics. The sodium tripolyphosphate deflocculant promoted the best deflocculation results for all clay mixtures, while the sodium silicate provides overdeflocculation at lower rates.Item Avaliação das propriedades de rejeitos contido no efluente industrial de uma empresa cerâmica como alternativa para reaproveitamento na fabricação de louças sanitárias(2022-05-23) Silva, Robson de França; Nascimento, Renalle Cristina Alves de Medeiros; http://lattes.cnpq.br/6167163214175615; http://lattes.cnpq.br/5901815548984027Effluents are all wastes originating from production processes or human consumption. They present specific physical, chemical and biological characteristics and their properties vary according to the raw material, the management and the branch of activity. When effluents are contaminated by solid materials from the industrial sector, treatments are usually carried out to separate the liquid part from the solid, thus obtaining a cleaner industrial waste. In a sanitary ware factory, ceramic clay slip is the propellant material for making the pieces. Sometimes this slip arrives at the effluent treatment plant and is then properly disposed of into the environment. Based on the above, this work aims to determine the physical, chemical and mineralogical characteristics of the mass retained in the filtration operations of the production process of sanitary ware. For this, a sample of retained mass, called sludge, from the industrial process of a factory of sanitary ware, was characterized from the tests of particle size distribution, Foster swelling, Cation Exchange Capacity and Specific Area, X-ray fluorescence spectroscopy, deflocculation curve, loss on fire and the test bodies, characterized by colour, shrinkage burning and flexural modulus of rupture. The results showed that the sludge had a wide particle size distribution, in the range of 0.3μm to 53μm, Haloisite4H2O as argillomineral of the clay fraction, high purity and good mechanical strength, being possible to infer that the reuse of sludge in ceramic mass is an alternative to reduce costs, resulting in a more sustainable production.