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

Detalhes bibliográficos
Ano de defesa: 2008
Autor(a) principal: Leonardo de Almeida Queiroz
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Minas Gerais
UFMG
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/1843/BUOS-9QQHE6
Resumo: 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.