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Simulation of direct leaching of zinc concentrate in a non‐ideally mixed CSTR
Author(s) -
Lampinen Matti,
Laari Arto,
Turunen Ilkka
Publication year - 2010
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20317
Subject(s) - continuous stirred tank reactor , ferrous , zinc , dissolution , leaching (pedology) , chemistry , ferric , particle size , mass transfer , population , oxygen , inorganic chemistry , chemical engineering , metallurgy , materials science , chromatography , environmental science , demography , organic chemistry , sociology , soil science , engineering , soil water
A simulation model for direct leaching of zinc concentrate in a continuous non‐ideally mixed stirred tank reactor (CSTR) is presented. The model takes into account the surface reactions between zinc in the solids and ferric iron ions in the liquid phase, oxidation of ferrous iron back to ferric iron, gas–liquid mass transfer of oxygen, decrease of particle size as the reaction proceeds, and the effect of hydrostatic pressure on the oxygen dissolution rate. The model is pseudo‐homogeneous and is approximative in the sense that it neglects the effects of particle size distributions and population balances of the concentrate particles.