Simulação e otimização do circuito de espessamento em pasta em um Deep Cone

• Ano de defesa: 2023
• Autor(a) principal: Douglas Soares Moreira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; Brasil; ENG - DEPARTAMENTO DE ENGENHARIA MINAS; Programa de Pós-Graduação em Engenharia Metalúrgica, Materiais e de Minas - Mestrado Profissional; UFMG
• Palavras-chave em Português: Fluido; Pasta; Polpa; Sedimentação; Viscosidade; Engenharia de minas; Tecnologia mineral; Viscosidade - Fluídos; Sedimentação (Geologia); Mineração; Manganês
• Link de acesso: http://hdl.handle.net/1843/58810

The development of this dissertation aimed to analyze the simulation and optimization of a Deep Cone thickener in order to obtain, at the end, an appreciative analysis of the mineral paste production equipment, working directly with the manganese ore waste. Through this approach, it was possible to verify, through sufficient data to carry out this work, the operational results from two different models, which were executed for the VOF (fluid volume) for simulation and the Eulerian model for the optimization of the fluid. At first, the concentration of solids in the medium, as well as the characteristic properties of the system, were considered mainly as input data, analytically obtaining simulation and optimization results for pressure, sedimentation velocity, viscosity and energy, observing in these the behavior of the fluid at each stage of the operating system. For that, the stages worked in the system were considered as initial, working with the pulp, the final stage working with the paste and an intermediate stage dealing with the mixture between the flows in the system, verifying in this way, the transformation of one fluid into another according to system conditions. At the end of the evaluation, a significant improvement in the results is observed through trial and error techniques through obtaining the best results for the percentage of solids and viscosity worked in question, demonstrating in a more cohesive way the guidelines to be taken for the optimal conditions for the flow regimes, for the energy distribution, and for the number of parameters needed in this analysis. Through these results, it appears that a significant increase in viscosity from 0.83 to 0.93, within the parameters of the Deep Cone, presents a significant reduction in the need for iterations between the grains in the middle, changing from 200 to 50, the number of iterations, also verifying graphically, a better disposition of the flows of fluids inside the equipment. It is worth mentioning that for the execution of this work, although few parameters are evaluated, the complexity of the series of tools is perceptible so that the analysis is possible, evaluating the necessary standards.