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http://dx.doi.org/10.14478/ace.2021.1075

Effect of Coal Tar Pitch Viscosity on Impregnation for Manufacture of Carbon Blocks with High Density  

Cho, Jong Hoon (C1 Gas & carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT))
Hwang, Hye In (C1 Gas & carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT))
Kim, Ji Hong (C1 Gas & carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT))
Lee, Young-Seak (Department of applied chemical engineering, Chungnam National University)
Im, Ji Sun (C1 Gas & carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT))
Kang, Seok Chang (C1 Gas & carbon Convergent Research, Korea Research Institute of Chemical Technology (KRICT))
Publication Information
Applied Chemistry for Engineering / v.32, no.5, 2021 , pp. 569-573 More about this Journal
Abstract
In this study, high-density carbon blocks were manufactured using coke, binder pitch, and impregnated pitch, then the effect of pitch fluidity on the densification of carbon blocks during the impregnation process was investigated. A green block was manufactured through high-pressure figuration of coke and binder pitch, and a carbon block was obtained through a heat treatment process. An impregnation process was performed to remove pores generated by volatilization of the binder pitch during the heat treatment process. The impregnation process was carried out the high-pressure reaction step of impregnating the pitch into the carbon block followed by the pretreatment step of melting the impregnation pitch. Melting of the impregnation pitch was carried out at 140~200 ℃, and the viscosity of the impregnation pitch decreased as the heat treatment temperature increased. The decrease in the viscosity of the impregnation pitch improved the fluidity and effectively impregnated the pores inside the carbon block, reducing the porosity of the carbon block by 83% and increasing the apparent density by 5%.
Keywords
Needle coke; Pitch; Impregnation; Porosity;
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