HF体系中AlF3杂质的溶解度与纯化机理

被引:0
|
作者
申耀宗 [1 ,2 ]
郭培民 [1 ,2 ]
王磊 [1 ,2 ]
孔令兵 [1 ,2 ]
郭庆 [3 ]
谢奕斌 [3 ]
机构
[1] 钢铁研究总院有限公司先进钢铁流程及材料国家重点实验室
[2] 钢研晟华科技股份有限公司
[3] 五矿铍业股份有限公司
基金
国家重点研发计划;
关键词
氟化氢体系; 铍冶金; 绿柱石; 氟化铝; 溶解度;
D O I
暂无
中图分类号
TF824 [铍];
学科分类号
摘要
为了解决现代铍冶金工艺中铍纯度低、铍收得率低以及危废渣量大等难题,本文聚焦铍冶金基础理论,提出了低温解离铍矿+物理纯化含铍化合物的提铍新方法。针对铍矿中含铝氟化物的除杂过程,在HF体系背景下,研究了AlF3杂质的溶解度规律和纯化机理,从溶解度实验结果来看,AlF3直接解离出来的Al3+浓度和F-浓度是很低的,在10-5级别,难以形成AlF63-配合物,所以在H2O体系中AlF3的溶解度要低于在HF体系中的溶解度,而在HF-H2O-AlF3体系下,会形成F的配位离子,使原本不溶的AlF3反而有了一定的溶解度。以此为基础,采用低温煅烧的方式破坏H3AlF6结构,将H3AlF6分解成AlF3,避免了H3AlF6对AlF3溶解度产生的影响,从而解决了杂质的分离难题。
引用
收藏
页码:1157 / 1162
页数:6
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