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巴斯特纳石及其氧合逃脱机制的分解模型
Jianfei Li1,2,3,4, Yubo Xu1,2,3, Xiaowei Zhang1,2,3
1School of Rare Earth Industry, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China.
ACS omega
|September 23, 2024
概括
这项研究揭示了bastnaesite氧化烤的多阶段机制,详细介绍了的逃生途径和氧化. 这些发现为优化稀土开采流程提供了关键的见解.
科学领域:
- 矿物加工 矿物加工
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 巴斯特纳石 (REFCO3) 是全球稀土的主要来源,氧化烤是主要的工业处理方法.
- 在烤过程中,巴斯纳石的精确分子层次分解机制仍然不完全理解.
- 优化从巴斯特纳石中提取稀土对于供应链安全和技术进步至关重要.
研究的目的:
- 阐明在分子层面上氧化烤过程中巴斯纳石的多阶段分解机制.
- 为了研究不同烤大气 (Ar和O2) 在 bastnaesite 处理中的作用.
- 为从巴扬奥博缩物中清洁和高效地提取稀土提供理论指导.
主要方法:
- 使用了两个烤气氛: (Ar) 和氧 (O2).
- 来自Bayan Obo的处理混合稀土缩物,采用Ar烤作为中间步骤.
- 采用了先进的特征技术,包括X射线衍射 (XRD),富里埃变换红外光谱 (FT-IR),传输电子显微镜 (TEM) 和X射线光电子光谱 (XPS).
主要成果:
- bastnaesite 的氧化烤过程分为不同的阶段进行.
- 第一个阶段涉及热分解和氧化 (REFCO3 → REOF + CO2).
- 第二阶段详细介绍了的逃生路径 (REOF + O2 → RE2O3 + OF; OF → O2 + F2),阐明了F和O元素的迁移和Ce氧化行为.
结论:
- 这项研究成功地划出了巴斯纳西特氧化烤的连续阶段.
- 拟议的机制澄清了和氧的迁移和氧化动态.
- 这些发现提供了重要的理论支持,以加强从巴斯特纳石中提取稀土的清洁提取.
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