废抛光粉中Si、Al杂质脱除技术研究

潘悦怡; 杨玉飞; 黄启飞; 杨金忠; 张晶; 胡双林

doi:10.3969/j.issn.1674-991X.2018.01.012

废抛光粉中Si、Al杂质脱除技术研究

doi: 10.3969/j.issn.1674-991X.2018.01.012

潘悦怡^1,2,
杨玉飞^1,*, ,,
黄启飞¹,
杨金忠¹,
张晶¹,
胡双林³

^1. 中国环境科学研究院土壤与固体废物研究所,北京 100012
^2. 中国矿业大学(北京)化学与环境工程学院,北京 100083
^3. 中国物资再生协会危险废物处置利用工作委员会,北京 100012

详细信息

作者简介:
潘悦怡(1991—),女,硕士,主要从事固体废物管理研究, pyueyi@foxmail.com

通讯作者:
杨玉飞 E-mail: yangyf@craes.org.cn

中图分类号: X705
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出版历程
- 收稿日期: 2017-06-20
- 刊出日期: 2018-01-20

Research on silicon and aluminum impurity removal from waste polishing powder

^1. Institute of Soil and Solid Waste, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
^2. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
^3. National Working Committee on Disposal and Utilization of Hazardous Waste, China National Resources Recycling Asscociation,Beijing 100012, China

More Information

Corresponding author: Yufei YANG E-mail: yangyf@craes.org.cn

摘要

摘要: 为高效回收废抛光粉中的稀土元素,需要预先脱除其中的Si、Al杂质。采用NaOH溶液浸出工艺脱除废抛光粉中的Si、Al杂质,研究了碱比(NaOH与抛光粉质量比)、浸出时间、浸出温度和碱浓度对Si、Al脱除率的影响。结果表明:碱比与浸出时间对Si、Al脱除率影响较大;当浸出温度为90 ℃,碱比为1.0,浸出时间为90 min,NaOH浓度为1.00 mol/L时,Si、Al脱除率分别可达95.37%和97.93%。
- 废抛光粉 /
- Si、Al除杂 /
- 碱法浸出 /
- 脱除率
Abstract: In order to recover rare earth efficiently from waste polishing powder, it is necessary to remove the silicon and aluminum impurities firstly. The removal of these impurities from the waste polishing powder by NaOH solution was investigated. The effects of alkali ratio (mass ratio of alkali to waste polishing powder), leaching time, leaching temperature and NaOH concentration were studied. As the results illustrate, alkali ratio and leaching time exert greater effects on the removal rate of silicon and aluminum impurities. When the waste polishing powder was leached under the conditions of alkali ratio of 1.0, 90 min, 90 ℃ and NaOH solution concentration of 1.00 mol/L, the leaching efficiency of silicon and aluminum was as high as about 95.37% and 97.93%, respectively.
- waste polishing powder /
- silicon and aluminum impurity removal /
- leaching by alkaline solution /
- removal rate

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参考文献(26)

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