Manganese extraction by sulfur-based reduction roasting-acid leaching from low-grade manganese oxide ores

被引：92

作者：

Zhang, Yuanbo ^{[1
]}

You, Zhixiong ^{[1
]}

Li, Guanghui ^{[1
]}

Jiang, Tao ^{[1
]}

机构：

[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China

来源：

HYDROMETALLURGY | 2013年 / 133卷

关键词：

Manganese oxide ores; Sulfur; Reduction roasting; Leaching; INDIAN-OCEAN; NODULES;

D O I：

10.1016/j.hydromet.2013.01.003

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In recent years, the comprehensive utilization of low-grade manganese oxide ores has received much attention due to the shortage of high-grade manganese ore resources. In this study, low-grade manganese oxide ores were treated by reduction roasting using chemically pure sulfur as a reductant Then, the roasted samples were subjected to sulfuric acid leaching to extract manganese (Mn). The effects of roasting temperature, roasting time, S/Mn mole ratio, sulfuric acid concentration, leaching temperature, stirring rate, leaching time and liquid-to-solid ratio on the Mn and Fe leaching were discussed. The leaching efficiencies of 95.6% for Mn and 14.5% for Fe were obtained under the following optimized conditions: 550 degrees C of roasting temperature, 10 min of roasting time, 0.50 of S/Mn, 1.0 mol/L of sulfuric acid concentration, 25 degrees C of leaching temperature, 200 r/min of stirring rate, 5 min of leaching time and 5:1 of liquid-to-solid ratio. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：126 / 132

页数：7

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