本文已被：浏览 2710次 下载 3394次
投稿时间：2014-02-22 修订日期：2014-02-25
投稿时间：2014-02-22 修订日期：2014-02-25
中文摘要: 采用氯化铵和硝酸铵配成的混合铵盐作浸出剂，用柱浸模拟风化壳淋积型稀土矿的浸出过程，考察混合铵盐浸出剂的配比、浓度、液固比、pH和流速等对稀土浸出率的影响。结果表明，这种类型的浸出剂对该稀土矿有较高的稀土浸出率，且能较好地抑制黏土矿物的膨胀，最优工艺条件为：NH4Cl和NH4NO3的质量比8∶2、浸出剂质量浓度10 g/L、浸出液pH=4.0、液固比2∶1、流速0.5 mL/min，在此条件下稀土浸出率为96.29%，黏土矿物的线膨胀率为2.738%。
Abstract:The effects of ratio and concentration of mixed ammonium salts (ammonium chloride and ammonium nitrate), ratio of liquid to solid (L/S), pH, and flow rate on leaching rate of rare earth(RE) from weathered crust elution deposited rare earth ores were investigated by column leaching method. The results show that RE can be leached by mixed ammonium salts with higher RE leaching rate and preferably anti-swelling of clay minerals. Leaching rate of RE is 96.29% and linear expansivity of clay minerals is 2.738% under the optimum conditions including mass ratio of leaching agent of NH4Cl∶NH4NO3 of 8∶2, concentration of leaching agent of 10 g/L, pH value of 4.0, L/S=2∶1, and flow rate of 0.5 mL/min.
keywords: weathered crust elution deposited rare earth ores leaching mixed ammonium salts expansivity
文章编号： 中图分类号： 文献标志码：
基金项目:国家自然科学基金资助项目（50974098，51274152）；教育部长江学者和创新团队发展计划项目（IRT0974）
| Author Name | Affiliation | |
| ZhangTingting | Wuhan Institute of Technology | pshh3@sina.com |
| ZhangZhenyue | ||
| XuZhigao | ||
| LiQiong | ||
| ChiRu'an | pshh3@sina.com |
引用文本：
张婷婷,张臻悦,徐志高,李琼,池汝安.混合铵盐浸出风化壳淋积型稀土矿中稀土的研究[J].有色金属（冶炼部分）,2014(8):30-33.
ZhangTingting,ZhangZhenyue,XuZhigao,LiQiong,ChiRu'an.Study of Leaching of Rare Earth from Weathered Crust Elution Deposited Rare Earth Ores with Mixed Ammonium Salt[J].Nonferrous Metals (Extractive Metallurgy),2014(8):30-33.
张婷婷,张臻悦,徐志高,李琼,池汝安.混合铵盐浸出风化壳淋积型稀土矿中稀土的研究[J].有色金属（冶炼部分）,2014(8):30-33.
ZhangTingting,ZhangZhenyue,XuZhigao,LiQiong,ChiRu'an.Study of Leaching of Rare Earth from Weathered Crust Elution Deposited Rare Earth Ores with Mixed Ammonium Salt[J].Nonferrous Metals (Extractive Metallurgy),2014(8):30-33.
关注微信公众号