Dissolution kinetics of celestite (SrSO4) in HCl solution with BaCl2

被引：34

作者：

Aydogan, Salih ^{[1
]}

Erdemoglu, Murat

Aras, Ali

Ucar, Goekhan

Ozkan, Alper

机构：

[1] Selcuk Univ, Dept Min Engn, TR-42075 Konya, Turkey

[2] Inonu Univ, Dept Min Engn, TR-44280 Malatya, Turkey

来源：

HYDROMETALLURGY | 2006年 / 84卷 / 3-4期

关键词：

celestite; hydrochloric acid; barium chloride; reaction kinetics;

D O I：

10.1016/j.hydromet.2006.06.001

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Leaching of celestite (SrSO4) in hydrochloric acid solution with BaCl2 was investigated to produce SrCl2 in solution, which is the main source for SrCO3. The effects of variables such as stirring speed, BaCl2 and HCl concentrations, and temperature and particle size, and also the presence of NaCl in the leaching solution were studied. The leaching was modeled according to the shrinking core model. The activation energy for the leaching process in 8.25 x 10(-3) M BaCl2 solution equilibrated with 0.5 M HCl was found as 68.8 U mol(-1). This value reveals that the dissolution of celestite is a chemical reaction controlled process. In agreement with the model, the reaction rate is inversely proportional to the particle size and increases as 0.73, 0.70 and 0. 19 powers of the H+, Cl- and Ba2+ concentrations, respectively. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：239 / 246

页数：8

共 25 条

[1] The chemistry of scale prediction [J].