Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 52, Issue 10, Pages 1768-1774Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2017.1296867
Keywords
Carbonate; hematite; low-grade carbonate-bearing iron ore; magnetic separation; magnetizing roasting
Funding
- National Science Foundation of China [51674064, 51674065]
- Fundamental Research Funds for National University [N140108001, N150106003]
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In this study, a process of magnetizing roasting followed by low-intensity magnetic separation (MR-LMS), which is used to separate and recover iron from a low-grade carbonate-bearing iron ore (containing 34.6 wt.% Fe), was investigated. A magnetic concentrate containing 65.4 wt.% Fe with an iron recovery rate of 92.6 wt.% was obtained under optimal conditions: roasting temperature of 800 degrees C, roasting time of 8 min, bitumite ratio of 10:100, grinding fineness of around 85 wt.% passing 38 mu m, and magnetic intensity of 0.12 T. In addition, the phase transformation and magnetic properties were analyzed by X-ray diffraction (XRD) and vibrating sample magnetometry (VSM) to reveal the mechanism.
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