从稀土冶炼废水沉淀物中提取稀土试验研究  

Leaching of Rare Earth From Sediment in Rare Earth Smelting Waste Water Pool

作　　者：黎永康[1] 梁勇[1,2] 邵龙彬 温葆林 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000 [2]钨资源高效开发及应用技术教育部工程研究中心,江西赣州341000

出　　处：《湿法冶金》2017年第3期227-229,250,共4页Hydrometallurgy of China

基　　金：江西理工大学清江青年英才支持计划项目;中国博士后科学基金特别资助项目(2015T80694);中国博士后科学基金面上基金资助项目(2013M541879);江西省博士后择优资助研究项目(2013ky37);江西省教育厅科学技术研究项目(GJJ13396)

摘　　要：稀土冶炼过程中产生的各类废水通常收集在废水池中,随着生产的进行,废水池底部会沉积大量固体渣,其中含有大量稀土。研究了采用焙烧预处理—盐酸浸出工艺从该沉积物中提取稀土,考察了浸出时间、温度、浸出剂浓度、液固体积质量比对稀土浸出的影响。结果表明:沉淀物在800℃下焙烧预处理1h,然后在80℃、液固体积质量比4∶1、搅拌速度400r/min条件下用浓度为5mol/L的盐酸浸出0.5h,稀土浸出率达99.18%,浸出效果较好。All kinds of waste water produced in the process of rare earth metallurgy are usually collected in waste water pool, a large amount of solid slag containing a high content of rare earth deposits at the bottom of the waste pool. A novel method for extracting rare earth from the sediment by roasting pretreatment-hydrochloric acid leaching was investigated. The effects of leaching time, temperature,hydrochloric acid concentration and liquid-to-solid ratio on leaching of rare earth were examined. The results show that the leaching rate of rare earth can reach 99.18~ under the conditions of roasting temperature of 800℃, roasting time of 1 h, leaching temperature of 80℃, hydrochloric acid concentration of 5 mol/L,liquid-to-solid ratio of 4 ： 1 and stirring speed of 400 r/min,leaching time of 0.5 h. The leaching effect is good.

关 键 词：废水沉积物 稀土 提取 

分 类 号：TF845[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]