EM - Escola de Minas

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/6

Notícias

A Escola de Minas de Ouro Preto foi fundada pelo cientista Claude Henri Gorceix e inaugurada em 12 de outubro de 1876.

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20122

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Autor: search.filters.author.Aquino, José Aury de

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2
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    Flotation routes for a phosphate ore bearing silicate-carbonate gangue.
    (2012) Albuquerque, Rodrigo Oscar de; Peres, Antônio Eduardo Clark; Aquino, José Aury de; Pereira, Carlos Alberto
    This laboratory scale investigation addressed two different process routes for the concentration of a phosphate ore bearing a silicate-carbonate gangue: (i) bulk apatite and calcite flotation followed by calcite flotation in the presence of phosphoric and citric acids; (ii) calcite flotation in the presence of carbon dioxide followed by apatite flotation. The target of selectively separating apatite from the contaminating silicates and carbonates was achieved. Following the flotation experiments, calcite zeta potential determinations were performed aiming at clarifying the mechanisms that rule the adsorption of the soybean bran oil soap onto the mineral surface in the presence of the modifying agents phosphoric acid, citric acid, and carbon dioxide.
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    Pilot scale direct flotation of a phosphate ore with silicate-carbonate gangue.
    (2012) Albuquerque, Rodrigo Oscar de; Peres, Antônio Eduardo Clark; Aquino, José Aury de; Praes, Plínio Eduardo; Pereira, Carlos Alberto
    The present pilot scale study addresses the direct flotation route for the concentration of a phosphate ore bearing a silicate-carbonate gangue. The target was to selectively separate apatite from a phosphate ore bearing silicate/carbonate gangue using flotation columns. Based on the results of a previous laboratory scale investigation, a reagents scheme was selected and tested, using, under alkaline conditions, corn starch and a natural collector extracted from the distillation of coconut oil. An open rougher-cleaner circuit yielded a final concentrate reaching 30.5% P2O5 grade, at 80.8% recovery level.