期刊
RESOURCES CONSERVATION AND RECYCLING
卷 172, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.resconrec.2021.105680
关键词
Flotation tailings; Suspension magnetization roasting; Iron phase transition; Magnetic performance; Microstructure analysis
资金
- National Natural Science Foundation of China [51734005]
- Open Foundation of State Key Laboratory of Mineral Processing [BGRIMM-KJSKL-2021-04]
- Liao Ning Revitalization Talents Program [XLYC1907162]
- China Postdoctoral Science Foundation-funded project [2020M680973]
The study demonstrates that the efficient extraction of iron from flotation tailings through suspension magnetization roasting and magnetic separation is a promising way to reduce emissions and efficiently treat mining tailings.
Iron tailings is the most common and largest mining waste, and given the serious social, economic, and environmental impacts caused by tailings, green and safe technologies are urgently needed for the efficient treatment of tailings. In the present work, efficient extraction of iron from flotation tailings via the suspension magnetization roasting and magnetic separation has been demonstrated as a promising way to reduce emissions and extracting iron from flotation tailings. The possibility of iron extraction from flotation tailing containing 21.86% iron and transformation mechanism were studied in a pilot-scale experiment. The results revealed that an iron concentrate having an iron grade of 66.51% and iron recovery of 72.90% could be obtained under the following conditions: roasting temperature of 470 degrees C, reductant concentration of 30%, reductant ratio of 1:1 (CO: H-2), and total gas flow of 16.0 m(3)/h. The mineralography and magnetic performance of the preconcentration concentrate, roasted product, magnetic concentrate, and magnetic tailings were studied by X-ray diffraction, iron chemical phase analysis, and the vibrating sample magnetometer. The effect of roasting on the microstructure of the products was also analyzed by scanning electron microscopy and laser particle size analysis to help understand the mechanism.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据