Metal recycling from waste memory modules efficiently and environmentally friendly by low-temperatur

来源 :中国科学:技术科学(英文版) | 被引量 : 0次 | 上传用户:qiufeng115
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Recycling of waste electrical and electronic equipment has become an urgent global issue in recent years from the prospectives of resources recycling and environmental protection.In the present work,the recycling of waste memory modules (WMMs)through low-temperature alkali melts was investigated,based on the thermodynamic analysis of the nonmetallic reactions of brominated epoxy resin,glass fiber and memory chip with the molten mixed alkali.The effects of the reaction temperature and the ratio of alkali mixture on the removal rate of nonmetallic parts in WMMs were discussed under the condition of air atmosphere.The optimum process parameters were further confirmed by in-situ monitoring of the temperature during the whole reaction process.The mixtures with Cu,Fe and Ni as the main components were obtained after the treatment of WMMs in the molten alkali.These mixed metals were further separated into copper-rich and ferronickel-rich metals by physical magnetic separation.Moreover,the precious metals Au and Ag were enriched in Cu-rich alloys.This work provided an efficient and environment-friendly method for metal recycling from WMMs.
其他文献
众所周知,文化是人类发展过程中创造性活动的成果,是人类创造的物质和精神财富的总和.文明则是历史积淀、传承、凝聚的文化成果的精华.在漫长的人类历史中,社会文明大体经历
All-solid-state supercapacitors with high power density and working stability are high-efficiency energy storage devices for smart electronic equipment.Developi
【摘要】随着经济的发展和社会的进步,英语在人们生活中的重要性越来越突出,因此搞好英语教学,提高学生的英语学习效果对学生以后的学习和发展具有重要的作用。英语故事与对话教学是英语教学的重要手段,在英语教学中较为常见,而且这种教学方式能够提高学生的表述能力,对学生的英语学习具有重要的意义。  【关键词】英语教学 英语故事 对话教学  【中图分类号】G623.31【文献标识码】A 【文章编号】2095-3
生态文明是人类社会进步的重要标志,包含意识文明、行为文明、制度文明和产业文明四个层次.建设生态文明,是落实科学发展观的重要内容,是实现可持续发展的必然要求,是构建和
文章主要对基于知识管理的我国电网项目综合后评估模型的建立进行了论述。本研究通过对各专家分发调研问卷,利用Expert Choice软件进行结果分析,并利用软件中群组决策功能对多
在邦家租赁,一辆10万元的汽车租用一年,如果你信用好,只需一成保价就能把车开回家;信用不好,则需付三成,但所需支付的租金并没有差别,都是5000多元。 If you have a good cr
我国的现代化建设已取得举世瞩目的成就,我国已成为世界第二大经济体.就在迅速创造物质财富(楼房、空调、电视机、冰箱、汽车、高铁等)的同时,也陷入了环境危机和生态危机.于
有一种说法,书法之变,在于“隶变”。有一种说法,“隶变”之法,在于“隶新”。有一种说法,“隶新”在于“隶我”……如果说,中国古代书法形态的转型与流变,能从甲、金、篆、
The dynamical microenvironments play a crucial role in neuronal spiking patterns.In this paper,we investigated the effect of oxygen concentration on different s
在凡人的日常生活中,人们难免要接触多种污染物并把它们或多或少地摄入体内。如废气、不洁净的饮水、粉尘、食物中的有害物质等,并由此引发多种疾病,如癌症、过敏 In the e