Santos, Fabiano Mariel Fernandes dosPina, Pablo dos SantosPorcaro, Rodrigo RangelOliveira, Víctor de Andrade AlvarengaSilva, Carlos Antônio daLeão, Versiane Albis2012-08-022012-08-022010SANTOS, F. M. F. et al. The kinetics of zinc silicate leaching in sodium hydroxide. Hydrometallurgy, v. 102, n. 1-4, p. 43-49, abr. 2010. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0304386X10000241>. Acesso em: 02 ago. 2012.0304386Xhttp://www.repositorio.ufop.br/handle/123456789/1229The 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.en-USZinc silicateSodium hydroxideLeaching kineticsShrinking particle modelChemical controlArtigo publicado em periodicoO periódico Hydrometallurgy concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3337021029066.