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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Filtros

20101

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Autor: search.filters.author.Santos, Fabiano Mariel Fernandes dosAssunto: search.filters.subject.Chemical control

Resultados da Pesquisa

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    The kinetics of zinc silicate leaching in sodium hydroxide.
    (2010) Santos, Fabiano Mariel Fernandes dos; Pina, Pablo dos Santos; Porcaro, Rodrigo Rangel; Oliveira, Víctor de Andrade Alvarenga; Silva, Carlos Antônio da; Leão, Versiane Albis
    The alkaline leaching kinetics of a zinc silicate ore assaying 34.1% Zn, 11.1% Fe and 22.9% SiO2 is studied in sodium hydroxide solutions. Speciation diagrams indicate zinc dissolution as [Zn(OH)4]2− and SEM analysis showed a progressive reduction in particle size during leaching which supports the shrinking particle model. The process is chemically controlled with an activation energy of 67.8±9.0 kJ/mol and reaction order with respect to NaOH determined as 1.44±0.46.