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http://dx.doi.org/10.5714/CL.2018.28.024

Influence of kneading ratio on the binding interaction of coke aggregates on manufacturing a carbon block  

Kim, Jong Gu (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Kim, Ji Hong (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Bai, Byong Chol (Korea Institute of Convergence Textile)
Choi, Yun Jeong (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Im, Ji Sun (Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT))
Bae, Tae-Sung (Jeonju Center, Korea Basic Science Institute)
Lee, Young-Seak (Institute of Carbon Fusion Technology, Chungnam National University)
Publication Information
Carbon letters / v.28, no., 2018 , pp. 24-30 More about this Journal
Abstract
Coke aggregates and carbon artifacts were produced to investigate the interactions of coke and pitch during the kneading process. In addition, the kneading ratio of the coke and binder pitch for the coke aggregates was controlled to identify the formation of voids and pores during carbonization at $900^{\circ}C$. Experiments and thermogravimetric analysis revealed that carbon yields were improved over the theoretical yield calculated by the weight loss of the coke and binder pitch; the improvement was due to the binding interactions between the coke particles and binder pitch by the kneading process. The true, apparent, and bulk densities fluctuated according to the kneading ratio. This study confirmed that an excessive or insufficient kneading ratio decreases the density with degradation of the packing characteristics. The porosity analysis indicated that formation of voids and pores by the binder pitch increased the porosity after carbonization. Image analysis confirmed that the kneading ratio affected the formation of the coke domains and the voids and pores, which revealed the relations among the carbon yields, density, and porosity.
Keywords
kneading process; coke aggregates; carbon artifacts; binder pitch; carbonization;
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