退役晶硅光伏太阳能电池中有价组分的回收工艺研究

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国家科技期刊平台
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中文摘要：退役晶硅光伏太阳能电池富含有价资源,具有一定回收价值,而提高有价组分分离和冶金效率,并改善黏结体系多组分解离效果,是实现资源高效回收的关键.研究了通过焙烧改性弱化EVA(乙烯-醋酸乙烯)黏结行为,强化晶硅光伏太阳能电池多组分选择性破碎特性,通过XRD、TG、SEM分析了物料分布规律、EVA黏结弱化行为及解离效果,并采用酸浸法进行目标组分的逐级回收.结果表明:经焙烧改性和破碎处理后,EVA黏结程度降低,材料的解离程度增强,强化了破碎效果;破碎后细粒级组分产率提高15％,不同粒度组成中有价金属发生选择性富集;通过助磨剂强化多组分的选择性解离行为,选择性破碎效果指数φ可达0.112;目标组分 Cu、Ag、Al、Si 浸出率为 98.33％、94.12％、97.21％、95.17％,Pb2+去除率为 93.53％.该工艺可为退役晶硅光伏太阳能电池的短程、清洁、绿色回收工艺的开发提供技术参考.

外文标题：Recycling Process of Valuable Components from Decommissioned Crystalline Silicon Photovoltaic Solar Cells

外文摘要：Decommissioned crystalline silicon photovoltaic solar cells are rich in valuable resources and have recovery value.Increasing the separation efficiency of valuable components and metallurgy,and improving the multi-group decomposition effect of the bonding system are the key to achieve efficient resource recovery.EVA(ethylene-vinyl acetate)bonding behavior was weakened by roasting modification,and multi-component selective crushing characteristics of crystalline silicon photovoltaic solar cells were strengthened.Material distribution,EVA bonding weakening behavior and dissociation effect were analyzed by XRD,TG and SEM,and the target components were recovered step by step by acid leaching method.The results show that after roasting modification and crushing treatment,the bonding degree of EVA decreases,the dissociation degree of EVA increases,and the crushing effect is strengthened.After crushing,the yield of fine-grained components increase by 15％,and the valuable metals in different particle size components are selectively enriched.The selective dissociation behavior of multiple components is strengthened by grinding aid,and the selective crushing effect index φ reaches 0.112.The leaching rates of Cu,Ag,Al and Si are 98.33％,94.12％,97.21％and 95.17％,respectively,and the removal rate of Pb2+is 93.53％.This process can provide technical reference for the development of short-range,clean and green recycling process for decommissioned crystalline silicon photovoltaic solar cells.

外文关键词：

crystalline silicon photovoltaic solar cellsvaluable componentrecyclingdisociationroastingmodificationselective fragmentationleaching

作者：

张宏涛、王红雪、董宪姝、付元鹏、姚素玲、樊玉萍

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作者单位：

太原理工大学矿业工程学院,山西太原 030024

关键词：

晶硅光伏太阳能电池有价组分回收解离焙烧改性选择性破碎指数浸出

基金：

山西省基础研究计划青年资助项目山西省回国留学人员科研资助项目

项目编号：

2021030212230452022-062

出版年：

2024

DOI：

10.13355/j.cnki.sfyj.2024.05.015

湿法冶金

核工业北京化工冶金研究院

湿法冶金

北大核心

影响因子：0.631

ISSN：1009-2617

年,卷(期)：2024.43(5)