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NdFeB酸法生产Nd2O3废水的处理与资源化研究
Study on Wastewater Treatment and Resource in Manufacture of Nd2O3 from NdFeB
【摘要】 任何浓度的盐酸都可以与水共沸,根据这一原理,采用蒸发浓缩的方法回收高铁含量的草沉废水中的盐酸和氯化亚铁。石灰中和法适用于脱除低铁含量的洗水中的Fe2+。本方法在NdFeB酸法生产Nd2O3废水的工业化处理实践中获得了良好的效果,废水中的盐酸回收为稀盐酸,废水中的铁回收为氯化亚铁晶体产品。
【Abstract】 Based on azeotropic characteristics of water and HCl, hydrochloric acid and FeCl2 were recovered from high Fe+2 concentrated filtrate of oxalic neodymium in manufacture of Nd2O3 from NdFeB by evaporation and condensation. Lime neutralization was favourable for treatment of low Fe+2 concentrated wastewater. The method is successfully applied to industrial treatment and renewable of wastewater in the manufacture of Nd2O3 from NdFeB.
【基金】 江苏大学高级人才基金资助平均浓度(mol/L)0.391.15
- 【文献出处】 环境科学与技术 ,Environmental Science and Technology , 编辑部邮箱 ,2004年S1期
- 【分类号】X703
- 【被引频次】2
- 【下载频次】98