通过磁化将铁和稀土从低强度磁性分离 (LIMS) 尾部通过磁化分离烤-磁性分离
Shaochun Hou1,2, Weiwei Wang1,2, Bo Zhang2
1School of Chemical and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
ChemistryOpen
|October 30, 2023
概括
磁化烤-磁性分离有效地从低强度磁性分离尾矿中恢复铁和稀土元素. 这种方法实现了高铁度等级和优秀的稀土回收,使有价值的资源提取成为可能.
科学领域:
- 金工程 金工程 金工程
- 矿物加工 矿物加工
- 材料科学 材料科学 材料科学
背景情况:
- 低强度磁分离 (LIMS) 尾矿是含有有价值的铁和稀土矿物质的副产品.
- 在LIMS尾矿中的血矿和稀土矿物质 (石,巴斯纳石) 具有较弱的磁性,限制了通过常规磁分离的回收.
- 石,多洛米特和两石被确定为主要的带物种.
研究的目的:
- 研究从LIMS尾矿中分离铁和稀土元素的方法.
- 为了优化磁化烤-磁性分离过程以提高回收.
- 评估铁和稀土缩物的后续加工潜力.
主要方法:
- 使用化学分析,X射线衍射 (XRD),ICP-MS和矿物释放分析 (MLA) 进行LIMS尾矿的表征.
- 优化磁化烤参数 (温度,时间) 和磁分离条件 (场强度,固体-液体比率).
- 使用XRD分析磁性缩物中的矿物相,并评估随后的分离技术 (研磨,逆漂浮).
主要成果:
- 在650°C下60分钟磁化烤,随后进行磁性分离,产生铁度65.49%的铁等级和65.16%的回收率.
- 磁缩物主要含有磁石和石,而石可以通过研磨和逆漂浮来去除.
- 磁性分离尾矿实现了11.98%的稀土氧化物 (REO) 等级,回收率为97.96%,表明有效的稀土元素分离.
结论:
- 磁化烤-磁性分离是从LIMS尾矿中回收铁的可行和有效方法.
- 该过程允许在尾矿中大量回收稀土元素,以便随后进行提取.
- 这种综合方法为提升LIMS尾矿的价值提供了一条有效的途径,提高了资源利用率.
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