化工进展2023，Vol.42Issue(12)：6218-6225,8.DOI:10.16085/j.issn.1000-6613.2023-0142
陶瓷膜在氢氧化铌粉体脱氟洗涤工艺的应用
Application of ceramic membranes in the defluorination washing process of niobium hydroxide powders
摘要
Abstract
To address the problems of intensive water consumption and high production of ammonia-containing wastewater in the defluorination washing process of niobium hydroxide powders,a ceramic membrane-based technology and process for niobium hydroxide powder washing was developed.The effects of membrane pore size,washing sequence and washing liquid usage on the removal of F-impurities from niobium hydroxide slurry were investigated.The final product purity and economic efficiency were compared between the ceramic membrane-based and the traditional pressure filter-based methods.The results showed that constant volume diafiltration washing was the best way for removing F-in niobium hydroxide slurry.When the ratio of material to washing liquid was 1∶60kg/L,the F-content in normal niobium hydroxide slurry reached the standard by using the α-Al2O3 ceramic membrane with a pore size of 200nm.The α-Al2O3 ceramic membrane with a pore size of 50nm could efficiently wash the ultra-fine niobium hydroxide powder.Both ceramic membranes indicated good stability in the application of niobium hydroxide powder washing.The ceramic membrane-based washing method showed excellent purification effect on niobium hydroxide as well as the final product Nb2O5.The method was obviously better than the pressure filter-based method in terms of removal impurities and saving operation cost.Therefore,the ceramic membrane-based washing process offered high technical and economic feasibility for promoting the green development of tantalum-niobium hydrometallurgy.关键词
氧化铝/陶瓷膜/氢氧化铌/粉体/洗涤Key words
alumina/ceramic membrane/niobium hydroxide/powders/washing分类
机械制造引用本文复制引用
乐剑峰,王帆,徐楠,王永达,王雨轩,年佩,李辉,张伟宁,魏逸彬..陶瓷膜在氢氧化铌粉体脱氟洗涤工艺的应用[J].化工进展,2023,42(12):6218-6225,8.基金项目
宁夏重点研发项目(2022BED92038) （2022BED92038）
宁夏东方钽业股份有限公司委托技术开发项目(2020019). （2020019）
