期刊
JOURNAL OF CENTRAL SOUTH UNIVERSITY
卷 22, 期 7, 页码 2515-2520出版社
JOURNAL OF CENTRAL SOUTH UNIV TECHNOLOGY
DOI: 10.1007/s11771-015-2780-7
关键词
manganese ore; reduction roasting; acid leaching; black charcoal
资金
- Teachers' Research Fund of Central South University, China [2013JSJJ028]
- Co-Innovation Center for Clean and Efficient Utilization of Strategic Mineral Resources, China
Reduction roasting-acid leaching process was utilized to process high-iron-content manganese oxide ore using black charcoal as reductant. The results indicate that, compared with the traditional reductant of anthracite, higher manganese extraction efficiency is achieved at lower roasting temperature and shorter residence time. The effects of roasting parameters on the leaching efficiency of Mn and Fe were studied, and the optimal parameters are determined as follows: roasting temperature is 650 degrees C, residence time is 40 min, and black charcoal dosage is 10% (mass fraction). Under these conditions, the leaching efficiency of Mn reaches 82.37% while that of Fe is controlled below 7%. XRD results show that a majority of MnO2 and Fe2O3 in the raw ore are reduced to MnO2 and Fe3O4, respectively.
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