Kinetics of leaching laterite

被引：74

作者：

Olanipekun, EO ^{[1
]}

机构：

[1] Ondo State Univ, Dept Chem, Ado Ekiti, Ekiti State, Nigeria

来源：

INTERNATIONAL JOURNAL OF MINERAL PROCESSING | 2000年 / 60卷 / 01期

关键词：

leaching laterite; hydrochloric acid; temperature;

D O I：

10.1016/S0301-7516(99)00067-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetics of leaching laterite with hydrochloric acid has been investigated at dilute solid phase concentrations in a magnetically stirred reactor. The effects of hydrochloric acid concentration and temperature on the dissolution rate of iron are reported. Preroasting of the laterite alters its mineralogical composition and increases its porosity and surface area, thus making it more amenable to leaching. The leaching rates were analyzed with the shrinking core models for reaction control. The leaching data for both raw and roasted laterites fit the diffusion kinetic equation with associated apparent activation energies of 71.7 and 65.2 kJ/mol, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：9 / 14

页数：6