Recovery of Manganese Ore Tailings by High-Gradient Magnetic Separation and Hydrometallurgical Method

被引：20

作者：

Zhang, Xiufeng ^{[1
,2
]}

Tan, Xiumin ^{[2
]}

Yi, Yuejun ^{[2
]}

Liu, Weizao ^{[1
]}

Li, Chun ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Sichuan, Peoples R China

[2] CAGS, Zhengzhou Inst Multipurpose Utilizat Mineral Reso, Zhengzhou 450006, Henan, Peoples R China

来源：

JOM | 2017年 / 69卷 / 11期

关键词：

SULFURIC-ACID; PYROLUSITE; REDUCTANT;

D O I：

10.1007/s11837-017-2521-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

With the depletion of high-grade manganese ores, Mn ore tailings are considered valuable secondary resources. In this study, a process combining high-gradient magnetic separation (HGMS) with hydrometallurgical methods is proposed to recycle fine-grained Mn tailings. The Mn tailings were treated by HGMS at 12,500 G to obtain a Mn concentrate of 30% Mn with the recovery efficiency of 64%. The Mn concentrate could be used in the ferromanganese industry. To recover Mn further, the nonmagnetic fraction was leached by SO2 in an H2SO4 solution. Hydrogen peroxide was added to the leachate to oxidize Fe2+ to Fe3+, and the solution pH was adjusted to 5.0-5.5 with ammonia to remove Al, Fe, and Si impurities. The purified solution was reacted with NH4HCO3, and a saleable product of MnCO3 with 97.9% purity was obtained. The combined process can be applied to Mn recovery from finely dispersed weakly magnetic Mn ores or tailings.

引用

页码：2352 / 2357

页数：6

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