Caracterização de minérios da Mina de Brucutu, Vale, focada na previsibilidade das operações de concentração mineral

• Ano de defesa: 2008
• Autor(a) principal: Leonardo de Almeida Queiroz
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Engenharia Metalúrgica; Materias e de Minas; Engenharia metalúrgica; Tecnologia mineral; Minérios de ferro Métodos de simulação; Concentradores (Beneficiamento de minério); Determinação mineralógica
• Link de acesso: http://hdl.handle.net/1843/BUOS-9QQHE6

A characterization study applied to the Brucutu iron ore deposit, VALE, was developed, which aimed to identify and determine the main characteristics in order to increase the concentration units predictability in the mineral treatment plant. Fundamental aspects related to the mineralogical analyses and mineral process testwork in bench and pilot plant scales, such as jigging, drum magnetic separation, wet high intensity magnetic separation, flotation in mechanical or conventional cells are presented in the bibliography review. Mineralogical analysis and mineral processing testwork in bench and pilot plant scales has been applied throughout. The modeling of iron ore concentration unit operations by jigging, magnetic separation and flotation took into account information about chemical composition, size distribution and particles mineral associations. Detailed investigation was applied considering the establishment of a procedure to validate the iron ore mineralogical analyses from several repeated determinations. Validation of process simulation to iron ore, applying the combination of chemical, mineralogical and size analyses, is presented. The main result obtained was to improve the prior information to reach better performance in jigging, magnetic concentration and flotation processes. Another contribution was the establishment of a simplified procedure to estimate the flowrate and the chemical composition to internal flows in conventional flotation circuits and the residence time necessary to reach these results applying flotation kinetics knowledge.