降低碳铵沉淀法生产氧化镧中氯离子含量的研究

Study on Technology of Decreasing Cl^- Content in Producing La₂O₃ by Using NH₄HCO₃ Subsidence Method

摘要: 为降低碳铵沉淀法生产氧化镧中氯离子含量,在不变换体系的情况下,通过改进沉淀工艺,选择多种洗涤剂进行比较及筛选试验,有效地解决了氧化镧中氯离子含量高的问题,将其应用于镧热还原-炉渣(即镧渣)回收氧化镧产品的生产实践中,获得了理想的效果。

Abstract: In order to decreasing Cl^- content in producing La₂O₃ by using NH₄HCO₃ subsidence method,by improving subsidency technology under the circumstances of not changing system,and selecting multiple washing liquid and screening,the problem of high Cl^- content can be resolved.This method can be used to recover La₂O₃ turnace slay produced in La thermal reduction.