Title of article
The kinetics of zinc silicate leaching in sodium hydroxide
Author/Authors
Santos، نويسنده , , Fabiano M.F. and Pina، نويسنده , , Pablo S. and Porcaro، نويسنده , , Rodrigo and Oliveira، نويسنده , , Victor A. and Silva، نويسنده , , Carlos A. and Leمo، نويسنده , , Versiane A.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2010
Pages
7
From page
43
To page
49
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.
Keywords
Chemical control , Shrinking particle model , Leaching kinetics , Zinc silicate , Sodium hydroxide
Journal title
HYDROMETALLURGY
Serial Year
2010
Journal title
HYDROMETALLURGY
Record number
2372188
Link To Document