Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 55, Issue 18, Pages 3427-3437Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2019.1677715
Keywords
Refractory iron ore; suspension magnetization roasting; selective reduction; magnetic transformation; magnetic separation
Funding
- National Natural Science Foundation of China [51904058, 51674064, 51734005, 51874105]
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A process of suspension magnetization roasting and magnetic separation, which is used to separate and recover iron from fine limonite, was investigated. Iron concentrates grade of 58.29 wt.% and recovery of 91.45 wt.% were obtained under conditions of roasting time of 20 min at 560?C, CO concentration of 30%, grinding fineness of 85 wt.% passing 38 ?m and total gas volume of 500 ml/min. X-ray diffraction (XRD), vibration sample magnetometer (VSM), scanning electron microscope (SEM) revealed fine weak magnetic limonite was selectively transformed into strong magnetic magnetite, porous structure of iron ore caused by magnetization roasting was helpful for grinding and magnetic separation.
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