摘要
废弃电视机资源量大、综合利用价值高,但利用难度大,环境污染严重。为了制订合理的综合利用工艺流程,利用人工拣选、X射线荧光光谱(XRF)分析、X射线衍射(XRD)分析、热重(TG-DTA/DSC)分析等方法研究了废弃电视机破碎产物元素组成、矿物组成、有价物质单体解离度等,结果表明,废弃电视机破碎产物主要包括覆铜电路板(43.52%)、铜丝(3.58%)、铝箔(3.98%)、锡(11.45%)、塑料(19.17%)和残余物(18.30%);根据组分密度差异、化学生物溶解特性和热解温度,推荐采用“气流分选—化学浸出—生物浸出—热解”工艺综合回收利用废弃电视机破碎产物中的有价组分。
Although the spent TV sets are regarded as the material of high value and large resource for comprehensive utilization,the utilization is difficult to be conducted and will result in serious pollutions to the environments.In order to work out a reasonable process flow for the comprehensive utilization,such means as hand sorting,X-ray fluorescence spectroscopy(XRF)analysis,X-ray diffraction(XRD)analysis and thermo gravimetric(TG-DTA/DSC)analysis were used to determine the elemental composition,mineral composition,and liberation degree of valuables in the crushed product of spent TV sets.The results show that the crushed products of spent TV sets were mainly composed of(43.52%)copper-clad circuits boards,(3.58%)copper wires,(3.98%)aluminum foil,(11.45%)tin metal,(19.17%)plastics and(18.30%)residues.According to the density difference between components,chemical biological dissolution characteristics and pyrolysis temperature,it is recommended that the process combined with pneumatic separation-chemical leaching-biological leaching-pyrolysis is applicable for recovery of valuable elements in spent TV sets.
作者
田莉
傅开彬
查威
白贵琪
Tian Li;Fu Kaibin;Zha Wei;Bai Guiqi(Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Mianyang Sichuan 621010,China;School of Environment and Resource,Southwest University of Science and Technology,Mianyang Sichuan 621010,China)
出处
《化工矿物与加工》
CAS
2021年第5期20-23,27,共5页
Industrial Minerals & Processing
基金
国家重点研发项目(2019YFC1803503,2019YFC1803504)
四川省科技计划资助项目(2020YFG0440)。
关键词
废弃电视机
电路板
铜丝
铝箔
物性分析
矿物回收
综合利用
气流分选
spent TV sets
circuit board
copper wire
aluminum foil
physical analysis
mineral recovery
comprehensive utilization
pneumatic separation
