徐萌,刘宝友,崔建国,李玮,王哲,侯睿恩,李家宇,张鹏飞

• 1:白云鄂博稀土资源研究与综合利用全国重点实验室
• 2:包头稀土研究院
• 3:内蒙古自治区核与辐射监测中心
• 4:内蒙古大学化学化工学院

摘要(Abstract)：

以硫酸浆化分解混合稀土精矿工艺为基础，设计了多级循环浆化分解实验，考察了循环级数对精矿中稀土、氟和磷等元素浸出规律的影响，确立了循环分解过程中酸浸液中REO,F和P等元素的迁移规律，提出了混合稀土精矿多级硫酸浆化循环分解工艺。本研究进行了100轮浆化循环分解实验，每轮渣率和H_2SO_4的消耗维持稳定，循环过程中每轮补充H_2SO_4量稳定，每轮REO浸出率在60%～65%,F浸出率>96%,P_2O_5浸出率在25%～30%，酸浸液中F和REO浓度维持稳定，P_2O_5浓度富集到150g·L~(-1)左右与酸浸液中的REO沉淀生成磷酸稀土进入水浸渣中，并分析了各元素的走向和存在形式，为混合稀土精矿硫酸浆化分解工艺工业化应用奠定基础。

关键词(KeyWords)： 稀土精矿;H_2SO_4;浆化分解;循环

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划（2022YFC2905304）;; 内蒙古科技兴蒙合作项目（2022YFXM0001）资助

作者(Author): 徐萌,刘宝友,崔建国,李玮,王哲,侯睿恩,李家宇,张鹏飞

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