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[1]汪思琪,桑子容,韩培林,等.硝酸-喷雾热解法回收磷酸铁锂正极废料的研究[J].武汉工程大学学报,2024,46(01):50-54.[doi:10.19843/j.cnki.CN42-1779/TQ.202211001]
 WANG Siqi,SANG Zirong,HAN Peilin,et al.Recovery of lithium iron phosphate cathode waste bynitric acid-spray pyrolysis method[J].Journal of Wuhan Institute of Technology,2024,46(01):50-54.[doi:10.19843/j.cnki.CN42-1779/TQ.202211001]
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硝酸-喷雾热解法回收磷酸铁锂正极废料的研究(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
46
期数:
2024年01期
页码:
50-54
栏目:
材料科学与工程
出版日期:
2024-03-12

文章信息/Info

Title:
Recovery of lithium iron phosphate cathode waste by
nitric acid-spray pyrolysis method
文章编号:
1674 - 2869(2024)01 - 0050 - 05
作者:
汪思琪桑子容韩培林姚家涛张 勇*
武汉工程大学材料科学与工程学院,湖北 武汉 430205
Author(s):
WANG SiqiSANG ZirongHAN PeilinYAO JiataoZHANG Yong*
School of Materials Science and Engineering,Wuhan Institute of Technology, Wuhan 430205, China
关键词:
磷酸铁锂硝酸喷雾热解碳酸锂
Keywords:
lithium iron phosphate nitric acid spray pyrolysis lithium carbonate
分类号:
X705
DOI:
10.19843/j.cnki.CN42-1779/TQ.202211001
文献标志码:
A
摘要:
采用硝酸浸出锂离子,调节pH沉铁后获得纯净的硝酸锂溶液,经喷雾热解可获得碳酸锂粉体。并利用X射线衍射、扫描电子显微镜、电感耦合等离子体发射光谱对其晶体结构、微观形貌、杂质离子含量进行表征。结果表明:在最佳酸浸条件:硝酸浓度4 mol/L、反应温度65 ℃、反应时间3 h,锂离子浸出率达到97.47%;在最佳喷雾热解条件:n(硝酸锂)∶n(甲醇)=1.0∶1.5配制混合溶液,热解温度为700 ℃,碳酸锂的转化率可达到99%以上,纯度可达到98.4%;所得产品为类球形,分散性较好。本方法有效避免了回收过程中其他杂质离子的引入,减少了除杂、洗涤的成本,且锂综合回收率较高。

Abstract:
Pure lithium nitrate solution was obtained by leaching lithium ions with nitric acid and adjusting the pH during iron precipitation. Lithium carbonate powder was prepared by spray pyrolysis. The crystal structure,microstructure and impurity ion content were characterized by X-ray diffraction,scanning electron microscopy and inductively coupled plasma emission spectroscopy. The results show that the leaching rate of lithium ion is 97.47% under the optimum acid leaching conditions with 4 mol/L of nitric acid concentration,at 65 ℃ for 3 h. The conversion of lithium carbonate is more than 99% and its purity is 98.4% under the optimum spray pyrolysis conditions with n(LiNO3)∶n(CH3OH)=1.0∶1.5 of mixed solution and 700 ℃ of pyrolysis temperature. And the obtained product has a spherical shape with good dispersion. This method effectively avoids the introduction of other impurity ions in the recovery process,reduces the cost of impurity removal and washing,and has a high comprehensive recovery of lithium.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2022-11-01
基金项目:青海省科技计划项目(2020-GX-103);海西州科技计划项目(2019-101)
作者简介:汪思琪,硕士研究生。Email:3150506319@qq.com
*通信作者:张 勇,博士,教授。Email:38323490@qq.com
引文格式:汪思琪,桑子容,韩培林,等. 硝酸-喷雾热解法回收磷酸铁锂正极废料的研究[J]. 武汉工程大学学报,2024,46(1):50-54.
更新日期/Last Update: 2024-03-01