A kinetic study of the leaching of a Nigerian ilmenite ore by hydrochloric acid

被引：111

作者：

Olanipekun, E ^{[1
]}

机构：

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

来源：

HYDROMETALLURGY | 1999年 / 53卷 / 01期

关键词：

Nigeria; ilmenite ore; hydrochloric acid;

D O I：

10.1016/S0304-386X(99)00028-6

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A kinetic study of the leaching of powdered ilmenite ore by hydrochloric acid has been investigated. The effects of (a) stirring speed ranging from 100 to 500 min(-1), (b) particle size ranging from 20 to 74 mu m. (c) acid concentration ranging from 7.2 to 9.6 M and (d) temperature ranging from 70 to 90 degrees C on titanium and iron dissolution are reported. The dissolution rates are significantly influenced by the temperature and concentration of the acid solutions. The experimental data for the dissolution rates of titanium and iron have been analyzed with the shrinking-core model for reaction control. The observed effects of the relevant operating variables on the dissolution rates are consistent with a kinetic model for diffusion control. The apparent activation energy for the dissolution of titanium and iron has been evaluated using the Arrhenius expression. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：1 / 10

页数：10

共 18 条

[1]

[Anonymous], 1970, SOLVENT EXTRACTION M

[2]

Benelite Corp. of America, 1974, U.S. Patent, Patent No. [3,825,419, 3825419]

[3]

DUNCAN JF, 1982, NEW ZEAL J SCI, V25, P103

[4] HYDROLYSIS OF TITANIUM(IV) IN AQUEOUS (NA,H)CL SOLUTION [J].