Engenharia Química
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Navegando Engenharia Química por Autor "Cardoso, Eduarda de Freitas"
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Relatório de Estágio Acesso aberto Estudo de distribuições granulométricas para o dimensionamento de um moinho de bolas por via úmida para uma indústria de tintas(2020) Cardoso, Eduarda de FreitasGrinding is a process that allows the reduction of the particle size of solid fillers, which can be carried out in two ways: dry and wet. In this work, the final product is liquid and, thus, the most advantageous process is wet grinding. For this type of grinding, a mixture known as slurry is prepared, which is composed of the load to be reduced, additives and water. The grinding granulometry used for the paint has shown that the closer to the 1000 Mesh, the more coverage and resistance the paint gets. However, granulometry interferes with the value of the load on the market, making it less accessible to buyers. Due to this problem identified during the supervised internship, the installation of a mill would be the most suitable solution. To this end, the company was instructed to design a mill that meets its investment needs to improve the production process. The present work aimed to study the particle size distributions for the design of a wet ball mill for a paint industry. For dimensioning it is recommended to use the Bond method, in which the main factors are calculated that allow the best formatting to be developed at the mill. For this, it is first necessary to carry out tests that check the reliability in improving the paint through grinding and, for that, some formulations of slurry and paint were developed until obtaining the best characteristics for the final product. For the formulation of the slurry, the following parameters were obtained: viscosity (82 kU), pH (10.57) and density (1.616 g / cm3 at 23.3 ° C). For the coverage assessment, the formulation 3, + 0.4 was the best result. The results of the calculations obtained for the dimensioning of the ball mill were: ball diameter (7.3 mm), mill diameter (2.818 m), recommended speed (22.629 rpm) and required energy (5.137 kWh). it is possible to obtain products with the same characteristics as the commercial standard and to dimension a ball mill by wet way to meet the needs of the assisted company.Monografia Acesso aberto Projeto de viabilidade técnico-econômica para a implementação de uma indústria de reaproveitamento da casca de arroz para produção de sílica biogênica(2020) Mendes, Amanda Antunes; Marcos, Amanda Kaori Kasita; Cardoso, Eduarda de Freitas; Ruiz, Ellen Duarte; Teixeira, Flávia Lopes; Flores, Juliana DemétrioThe use of industrial co-products as the raw materials for the synthesis of new products has shown an increasingly assertive, viable and environmentally correct practice. An example is the use of the residue from the rice processing industries to produce silica, a product that is widely versatile industrially and with high added value. Thus, the present work presents the preparation of a business plan that addresses the technical and economic feasibility for the implementation of a rice husk reuse industry in order to produce biogenic silica in the southern region of Santa Catarina. There were several aspects related to the branch of the proposed enterprise, from the preparation of the company's strategic planning, marketing study, basic and applied engineering, other engineerings such as environmental and work safety, quality control, to economic planning and financial viability. In the strategic planning chapter, business definitions, main competitors and possible competitors were addressed. In the marketing part, the artifices for the promotion of the brand were listed, as well as the product specifications. As for the aspects related to basic and applied engineering, the process and operation of the unit were described, specifying characteristics of the equipment sizing. Subsequently, environmental and occupational safety engineering approach to the enterprise is directed with special attention to current and applicable laws. It was also important to list the management and quality control tools. Finally, the economic planning and economic feasibility lists costs, profits and other monetary aspects.