Effect of pretreatment on extraction rate of rare earth from waste CRT phosphors

WANG Lianzhen; SHEN Xingmei; LI Liaosha

doi:10.3969/j.issn.0438-1157.2014.04.036

您当前的位置：

首页 >

文章列表页 >

Effect of pretreatment on extraction rate of rare earth from waste CRT phosphors

更新时间：2025-12-10

- Effect of pretreatment on extraction rate of rare earth from waste CRT phosphors
- CIESC Journal Issue 4, Pages: 1416-1423(2014)
- 作者机构：
  
  安徽工业大学教育部冶金减排与资源综合利用重点实验室,安徽,马鞍山,243002
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.04.036
  CLC： Q09
- Online First：21 October 2013，
  
  Published：21 October 2013
- 稿件说明：
移动端阅览
WANG Lianzhen, SHEN Xingmei, LI Liaosha. Effect of pretreatment on extraction rate of rare earth from waste CRT phosphors[J]. CIESC Journal, 2014, (4): 1416-1423.
DOI：

WANG Lianzhen, SHEN Xingmei, LI Liaosha. Effect of pretreatment on extraction rate of rare earth from waste CRT phosphors[J]. CIESC Journal, 2014, (4): 1416-1423. DOI： 10.3969/j.issn.0438-1157.2014.04.036.

摘要

采用稀盐酸预处理工艺，对预处理前后废弃CRT荧光粉中稀土的提取效果进行了比较研究。结果表明，预处理工艺的最佳条件为：盐酸浓度为0.8 mol·L-1，反应温度为65℃，反应时间为2 h。与未预处理样品相比，预处理样品酸解后得到的浸出液中稀土的浸出率由21.18%提高到60.17%，而杂质的浸出率由45.21%减少到10.43%。经沉淀、煅烧后所得稀土产物为Y2O3和Eu2O3，总含量为98.20%。其中，Y2O3含量为90.25%。稀土产物主要为立方晶型的Y2O3，由片状晶体密集堆积而成，片晶之间紧密结合，形成密实的方体结构。稀酸预处理工艺不仅能显著提高废弃CRT荧光粉中稀土提取的效率，实现稀土资源的高效、可持续利用，而且可以减少化学试剂的消耗，为废弃电子产品的综合利用提供研究基础与技术支撑。

Abstract

A comparison study for extraction of rare earths from waste Cathode Ray Tube (CRT) phosphors was carried out before and after dilute acid pretreatment process. The results show that the optimum conditions for the pretreatment process are as follows: hydrochloric acid concentration 0.8 mol·L-1

reaction temperature 65℃

and leaching time 2 h. Compared with the untreated sample

extraction rate of rare earths for pretreated sample increases from 21.18% to 60.17%

whereas for impurities the rate decreases from 45.21% to 10.43%. The rare earth products obtained after precipitation and sintering are mainly Y2O3 and Eu2O3

total content of rare earth oxides 98.20% among them Y2O3 90.25%

which are of cubic crystal

and close integration of lamella crystals to form a compact structure. The dilute acid pretreatment process can not only improve the efficiency of rare earth extraction and achieve sustainable and efficient utilization of rare earth resources

but also reduce the consumption of reagent and provide research foundation and technical support for comprehensive utilization of waste electronic products.

关键词

Keywords

references

Views

300

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Mechanism study on mechanochemical solid-phase oxidation recovery of spent LiFePO4 batteries

Optimal calculation of pressure setting value of flare system considering downstream risks

Application of ionic liquid in preparation of nanocellulose

Leaching of chromite ore processing residue from non-calcium roasting with hydrochloric acid

Review on processes and technologies for recovery of valuable metals from spent lithium-ion batteries

Related Author

LIU Jiawen

XIA Wencheng

WU Feng

PENG Yaoli

XIE Guangyuan

Haiqing WANG

Yin LIU

Xiaolin XU

Related Institution

School of Chemical Engineering, China University of Mining and Technology

Department of Safety Science and Engineering, China University of Petroleum

PetroChina Guangdong Petrochemical Company Equipment Management Center

College of Environment and Resources, Fuzhou University

Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province, Qilu University of Technology

⁰