NaClO3氧化-NaOH沉淀联合法去除钕铁硼废料盐酸优溶液中的铁(Ⅱ)  

Removal of Iron(Ⅱ)from NdFeB Waste Hydrochloric Acid Priority Solution by NaClO3 Oxidation-NaOH Precipitation Combination Process

作　　者：邓曹锋 肖卫东 熊永德 谢春宝 胡巍钟 陈皆良 DENG Cao-feng;XIAO Wei-dong;XIONG Yong-de;XIE Chun-bao;HU Wei-zhong;CHEN Jie-liang(Ganzhou Rare Earth Youli Science and Technology Development Co.,Ltd.,Ganzhou 341000,Jiangxi,China)

机构地区：[1]赣州稀土友力科技开发有限公司,江西赣州341000

出　　处：《有色金属（冶炼部分）》2020年第11期30-34,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：2017年赣州市科技计划项目(赣市财教字[2017]179号)。

摘　　要：研究了NaClO3氧化-NaOH沉淀联合法对钕铁硼废料盐酸优溶液中Fe^2+去除效果,考察了氯酸钠用量、反应终点pH、反应温度、反应时间和陈化时间对Fe^2+去除率的影响。结果表明,在下述最佳工艺条件下,Fe^2+的去除率超过99%,除铁后滤液中Fe^2+含量小于120mgL:NaClO3用量为理论计算质量1.1倍、反应温度70℃、反应时间2h、沉淀终点pH=3.50、陈化时间8h。该工艺已成功应用于本公司盐酸优溶液除Fe^2+工艺中。Fe^2+removal efficiency of NdFeB waste hydrochloric acid priority solution by sodium chlorate oxidation-NaOH precipitation combined process was studied.Effects of sodium chlorate dosage,pH value of reaction end point,reaction temperature,reaction time and aging time on iron removal rate were investigated.The results show that Fe^2+removal rate is 99%above and Fe^2+content in filtrate solution is 120 mg L below under the optimum conditions including sodium chlorate dosage of 1.1 times of theoretical dosage,reaction temperature of 70℃,reaction time of 2 h,pH value of precipitation end point of 3.50,and aging time of 8 h.The process has been successfully applied in our company to remove Fe^2+from hydrochloric acid priority solution.

关 键 词：NaClO 3 NAOH 钕铁硼废料 盐酸优溶液 除铁(Ⅱ) 

分 类 号：TF803.25[冶金工程—有色金属冶金]