Recycling of Silicone Rubber from Composite Insulator with Pyrolysis Method  

作　　者：Ruiqi Shang Liming Wang Fanghui Yin Masoud Farzaneh 

机构地区：[1]Institute of Advanced Technologies in Energy and Electrical Engineering(IAT3E),Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China [2]Department of Applied Sciences(DSA),University of Quebec at Chicoutimi,Chicoutimi,QC G7H2B1,Canada

出　　处：《CSEE Journal of Power and Energy Systems》2024年第4期1787-1798,共12页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by the National Natural Science Foundation of China(51977118).

摘　　要：Composite insulators have been widely used in transmission lines.After being removed from transmission lines,their housing silicone material cannot degrade naturally.To tackle this problem,this paper proposes an effective method to recycle waste insulators by pyrolysis to obtain mullite(3Al_(2)O_(3)·2SiO_(2))with high purity and compact structure.The recycling process studied will not generate toxic products.The thermal degradation process of housing material is investigated by analyzing its degradation products including the gas and residues in detail.The experimental results indicate that the colorant agent Fe2O3 inside the housing material is beneficial for the generation of mullite by decreasing the temperature of mullitization.Besides,since the transitional alumina generated by the dehydration of aluminum hydroxide(ATH)has a smaller diameter and can better dissolute into the silica phases,ATH is a better choice as the additional aluminum resource.By comparing the components,structure,and particle size of grains formed at different calcination temperatures,the proposed pyrolysis temperatures of the two stages are 1400◦C and 1600◦C,respectively.

关 键 词：Composite insulator MULLITE PYROLYSIS RECYCLING silicone rubber SINTERING 

分 类 号：TM216[一般工业技术—材料科学与工程]