| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 213124 | Hydrometallurgy | 2010 | 7 Pages |
Abstract
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.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Fabiano M.F. Santos, Pablo S. Pina, Rodrigo Porcaro, Victor A. Oliveira, Carlos A. Silva, Versiane A. Leão,