05.1 - Graduação (UACSA)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2909
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Resultados da Pesquisa
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.Item Otimização da operação de britagem de peças de refugo no processo produtivo de uma empresa cerâmica(2020-10-24) Silva, Robson de França; Fonseca, Juliana de Castro Macedo; http://lattes.cnpq.br/8869180950884002; http://lattes.cnpq.br/5901815548984027Crushing is a unitary operation that aims at the fragmentation of a certain material, usually coming from mines, into smaller parts. This process is commonly used in the initial stages of production, but there are also ceramic industries that use the crusher as a means of transformation for the scrap of production to be used as a raw material. Therefore, this study aims to increase the efficiency of the crushing process of scrap parts in a ceramic industry. For this purpose, a brainstorming was done together with collaborators, and then data were created to size the operation (such as time to feed the crusher, time needed to crush a pallet with scrap parts, time needed to remove the scrap label, quantity of parts sent per day to the scrap, among others). With these data and parameters established, a study was made to know which factors were more harmful to the process, and it was discovered that the step of the removal of the indicative label of scrap was wasting a lot of time. Thus, the influence of the label material on the characteristics of the barbotine and part after sintering was studied. Rheological tests of barobotin and mechanical tests of compression, color, shrinkage and loss to the furnace of the sintered part were performed. It was verified that the label did not alter neither the properties of the casbutin nor the properties of the sintered part, being this step eliminated from the process and it was possible a 20% increase in the quantity of crushed pallets, besides a saving of almost 7 thousand reais per year.