|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||7th International Symposium on High Temperature Metallurgical Processing
||Recovery of Powdered Metallic Iron from Ludwigite Ore via Reductive Roasting with Sodium Salts-Magnetic Separation
||Guanghui Li, Huanpeng Mi, Binjun Liang, Zhiwei Peng, Yuanbo Zhang, Tao Jiang
|On-Site Speaker (Planned)
Ludwigite ore has not yet been utilized on an industrial scale due to its complex mineralogy and fine mineral dissemination. In this study, sodium salts were employed to enhance the separation of iron and born by reductive roasting-magnetic process. It was found that the separation of iron and boron as well as the iron grade and recovery were significantly improved by the addition of Na2SO4 or Na2CO3. However, Na2CO3 was more effective than Na2SO4 as excessive Na2SO4 could decrease the recovery of the iron. XRD and microstructure analyses indicated that the iron oxides were transformed into metallic iron and the average metallic iron grains were grown to over 40 μm which was beneficial for magnetic separation of metallic iron from gangue minerals. Boron enriched in nonmagnetic fraction is good for subsequent boron extraction by water leaching.
||Planned: A print-only volume