Kinetics of pressure leaching of niobium ore by sulfuric acid

被引：22
作者：
Yang, Xiuli [1 ]
Zhang, Junwei [1 ]
Fang, Xihui [1 ]
Qiu, Tingsheng [1 ]
机构：
[1] Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou 341000, Jiangxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2014年 / 45卷
关键词：
Niobium ore; Pressure leaching; Sulfuric acid; Kinetics; EXTRACTION; TANTALUM;
D O I：
10.1016/j.ijrmhm.2014.04.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The current study was carried out to investigate the kinetics of pressure leaching of niobium ore in sulfuric acid media. The effects of stirring speed, oxygen pressure, sulfuric acid concentration, particle size and temperature on the leaching efficiency of niobium were studied. It was found that over 98% niobium was leached by mixing the ground ore to -74 mu m with sulfuric acid concentration 10 M, and heating for 2 h at 200 degrees C. The pressure leaching of niobium ore in sulfuric acid solution depends largely on the temperature and follows a surface reaction control kinetic model. An activation energy value of 43 kJ/mol was determined for the temperature range of 100 degrees C to 200 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：218 / 222
页数：5
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