Recovery of Iron from Pyrite Cinder Containing Non-ferrous Metals Using High-Temperature Chloridizing-Reduction-Magnetic Separation
Recovery of Iron from Pyrite Cinder Containing Non-ferrous Metals Using High-Temperature Chloridizing-Reduction-Magnetic Separation
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DOI：
10.1007/s11663-017-0913-0
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发表时间：
2017-01
期刊：
影响因子：
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通讯作者：
Dong Chen;Hongwei Guo;Jifang Xu;Y. Lv;Zemin Xu;Haijiang Huo
中科院分区：
文献类型：
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作者：
Dong Chen;Hongwei Guo;Jifang Xu;Y. Lv;Zemin Xu;Haijiang Huo
研究了高温氯化还原磁选法从含有色金属硫铁矿中回收铁的新工艺。考察了还原温度、还原时间、氯化剂用量等因素对反应的影响。结果表明，最佳工艺参数为：CaCl2用量2%、氯化温度1398 K（1125 °C）、氯化时间10 min、还原温度1323 K（1050 °C）、还原时间80 min、研磨粒度小于45μm的78.8%、磁场强度73 mT。在最佳条件下，铜，铅，锌的去除率分别为45.2%，99.2%和89.1%。磁选精矿含铁90.6%，铁回收率94.8%。通过X射线粉末衍射、扫描电子显微镜和光学显微镜等手段对样品的微观结构和相变化进行分析，确定了还原行为和分离机理。
This study presents a new technique that uses high-temperature chloridizing -reduction-magnetic separation to recover iron from pyrite cinder containing non-ferrous metals. The effects of the reduction temperature, reduction time, and chlorinating agent dosage were investigated. The optimized process parameters were proposed as the following: CaCl2dosage of 2 pct, chloridizing at 1398 K (1125 °C) for 10 minutes, reducing at 1323 K (1050 °C) for 80 minutes, grinding to a particle size of 78.8 pct less than 45μm, and magnetic field intensity of 73 mT. Under the optimized conditions, the Cu, Pb, and Zn removal rates were 45.2, 99.2, and 89.1 pct, respectively. The iron content of the magnetic concentrate was 90.6 pct, and the iron recovery rate was 94.8 pct. Furthermore, the reduction behavior and separation mechanism were determined based on microstructure and phase change analyses using X-ray powder diffraction, scanning electron microscope, and optical microscopy.