HEAT TREATMENT OF ELECTRODE COAL PITCHES AND MIXTURES BASED ON THEM
https://doi.org/10.57070/2304-4497-2025-1(51)-63-71
Abstract
Coal tar is a residue of coal tar distillation, which is widely used as a binder in the production of electrodes and anode paste. Of particular interest is the production of pitch carbonates with a maximum yield value for the development of a highly efficient technology. The paper shows the effect of heat treatment of a category B electrode pitch on the yield of carbonizate. Using the example of category C pitch, it is shown that thermal oxidation increases the yield of carbonates of high-melting and high-temperature pitches. The addition of inclusions of high-melting and high-temperature pitches of category С to the mass of pitch of category В increases the yield of its carbonizate. For example, the introduction of a high-temperature pitch additive (softening temperature Tsp = 148 °C, mass fraction of the additive ω = 31.8 %) into a category B electrode pitch reduces the yield of volatile substances and increases the yield of carbonate from 50.8 to 54.0 %.For example, the introduction of a category B electrode pitch, 31.8 % in the form of a high-temperature pitch (Tsp = 148 °C), reduces the yield of volatile substances and increases the yield of carbonizate from 50,8 % to 54,0 %. The introduction of the same amount of high-melting pitch additive (Tsp = 202 °C) increases the yield of carbonizate by 10 %. In both cases, the yield of volatile substances decreases. The results on the effect of heat treatment of the electrode pitch of category B on the yield of carbonizate are shown. The dependences of the yield of carbonizate on the temperature of heat treatment are established. It was shown for the first time that heat treatment of a category B electrode pitch at 350 °C increases the yield of carbonizate by 7 %. The dependence of the yield of carbonizate on the yield of volatile substances for pitches after heat treatment was obtained. It is shown that when heated to 300 °C, the yield of carbonizate does not depend on a decrease in the yield of volatile substances of the initial pitch.
About the Authors
Rodion Yu. Kovalev
Federal Research Center of Coal and Coal Chemistry SB RAS
Russian Federation
Russian Federation
Cand. Sci. (Phys.-Math.), Researcher at the Laboratory of Thermal Coal Conversions
Andrey P. Nikitin
Federal Research Center of Coal and Coal Chemistry SB RAS
Russian Federation
Russian Federation
Cand. Sci. (Phys.-Math.), Senior researcher at the Laboratory of Thermal Coal Conversions
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Review
For citations:
Kovalev R., Nikitin A. HEAT TREATMENT OF ELECTRODE COAL PITCHES AND MIXTURES BASED ON THEM. Bulletin of the Siberian State Industrial University. 2025;(1):63-71. (In Russ.) https://doi.org/10.57070/2304-4497-2025-1(51)-63-71
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