THE KINETICS OF IRON DISSOLUTION FROM CHROMITE CONCENTRATE

被引：3

作者：

SHARMA, T

机构：

[1] Dept. of Fuel and Mineral Engng., Indian School of Mines, Dhanbad

来源：

MINERALS ENGINEERING | 1990年 / 3卷 / 06期

关键词：

chromite; dissolution; Leaching;

D O I：

10.1016/0892-6875(90)90004-U

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The aim of the present investigation is to reduce the Fe/Cr ratio of chromite concentrate so that it can be used for the production of ferrochrome. For this purpose the dissolution of iron from chromite concentrate in sulphuric acid was investigated in the temperature range 303 to 363 K. The effect of stirring rate, temperature and particle size on dissolution rate were studied. During the initial stages of the process, chemical reaction at the mineral surface is rate controlling, while during the later stages diffusion through the product layer is rate controlling. Overall the process follows the mixed control model embodying both chemical reaction and diffusion. The activation energy for dissolution of iron was found to be in the range of 23 to 26.7 KJ/mole. © 1990.

引用

页码：599 / 605

页数：7