Affiliation of Author(s):
冶金工程学院
Key Words:
中文关键字：铝电解, 改性沥青, 电解膨胀, 低温熔体, 表观活化能，英文关键字：Aluminum Electrolysis, Modified Pitch, Electrolysi
Abstract:
Electrolysis expansion of pitch, modified by furan, phenolic-aldehyde and epoxy, based TiB2-C composite cathodes in low temperature melts containing K were investigated, and TGA was used to study dynamics of pyrolytic process about various modified pitch. The results show that, compared with electrolysis expansion of unmodified pitch based composite cathode, pitch modified by furan, phenolic-aldehyde and epoxy based composite cathodes all exhibit lower electrolysis expansion which are 1.61 %, 1.62 % and 1.68 % respectively. The maximum depressed amplitude can reach 13.77 %. Apparent activation energy (AAE) concerning pyrolysis process of pitch is related to electrolysis expansion of composite cathodes. The higher the AAE, the lower the electrolysis expansion, and the AAE of unmodified pitch is 47.21 kJ/mol, while the AAE of pitch modified by furan, phenolic-aldehyde, and epoxy are 66.25 kJ/mol, 57.07 kJ/mol and 63.24 kJ/mol severally. The values of them can account for test result of electrolysis expansion mentioned above.
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