The Influence of Organic and Inorganic Additives on the Specific Electrical Resistance of Coke

2024;
: pp. 109 - 118
1
National Technical University “Kharkiv Polytechnical Institute”
2
State Enterprise "Ukrainian State Research Institute for Carbochemistry (UKHIN), management department Kharkiv, Ukraine
3
State Enterprise "Ukrainian State Research Institute for Carbochemistry (UKHIN), coal department Kharkiv, Ukraine
4
State Enterprise "Ukrainian State Research Institute for Carbochemistry (UKHIN), coal department Kharkiv, Ukraine
5
Department of Oil, Gas and Solid Fuel Technologies National Technical University Kharkiv Polytechnic Institute, Kharkiv, Ukraine
6
Lviv Polytechnic National University

This study aimed to evaluate the effect of both inorganic (boron carbide nanopowders and silicon carbide (carborundum) and organic lean (petroleum coke) additives on the quality of coke produced in a laboratory furnace, as well as on its electrical properties. Analyzing the results of the quality assessment of the obtained coke, it can be argued that the addition of a fixed amount $(0.25-0.5 \ wt.\%)$ of non-caking nanoadditives allows to regulate the process in the plastic state in order to increase the coke strength. This modification affects the coke quality and has a significant dependence on the grade composition of the coal charge. The use of nanoadditives is especially important for coal charges with poor coking properties. Adding $5\%$ of petroleum coke to the coal charge leads to an increase in the gross coke yield by $1.2-1.3\%$; a decrease in coke ash content by $0.2-0.3\%$; an increase in the total sulfur content in coke by $0.15-0.23\%$; deterioration in both mechanical $(P25 − F 0. 1-0.6\%; I10 − by \ 0.1-0.2\%)$ and coke strength after the reaction $(CSR - by \ 0.6-1.0\%)$, coke reactivity $(CRI - by \ 0.2-0.3\%)$, as well as structural strength $(SS \ by \ 0.3-0.4\%)$, abrasive hardness $(AH \ by \ 0.7-1.0 \ mg)$ and specific electrical resistance $(ρ \ by \ 0.002-0.007 \ Om×cm)$. The obtained data may indicate an increase in the order degree of the coke structure and the appearance of a larger number of nanostructures. In addition, it should be noted that a sharper deterioration in blast furnace coke quality is observed when using a coal charge characterized by a lower coal content of the Concentrating Factory Svyato-Varvarynska LLC.

  1. Sakurovs, R.; Koval, L.; Grigor M.; Sokolova, A.; de Campo, L.; Rehm, K. Nanostructure of Cokes. Int J Coal Geol 2018, 188, 112–120. http://dx.doi.org/10.1016/j.coal.2018.02.006
  2. Sakurovs, R.; Grigor, M.; Sokolova, A.; Mata, Ya. Effect of High Temperature on Nanopores in Coke. Fuel 2023, 334, 126821. https://doi.org/10.1016/j.fuel.2022.126821
  3. Suarez-Ruiz, I.; Crelling, J.C. Coal-Derived Carbon Materials. In Applied Coal Petrology. The Role of Petrology in Coal Utiliztion; Suarez-Ruiz, I.; Crelling, J.C., Eds.; Burlington, 2008; pр 193–225. https://doi.org/10.1016/B978-0-08-045051-3.X0001-2
  4. Zhu, H.-b.; Zhan, W.-l.; He, Z.-j.; Yu, Y.-c; Pang, Q.-h; Zhang, J.-h. Pore Structure Evolution During the Coke Graphitization Process in a Blast Furnace. Int. J. Miner. Metall. Mater. 2020, 27, 1226–1233. https://doi.org/10.1007/s12613-019- 1927-1
  5. Flores, B.D.; Flores, I.V.; Guerrero, A.; Orellana, D.R.; Pohlmann, J.G.; Diez, M.A.; Borrego, A.G.; Osório, E.; Vilela, A.C.F. Effect of Charcoal Blending with a Vitrinite Rich Coking Coal on Coke Reactivity. Fuel Process. Technol. 2017, 155, 97– 105. https://doi.org/10.1016/j.fuproc.2016.04.012
  6. Zhang, H.; Bai, J.; Li, W.; Cheng, F. Comprehensive Evaluation of Inherent Mineral Composition and Carbon Structure Parameters on CO2 Reactivity of Metallurgical Coke. Fuel 2019, 235, 647–657. https://doi.org/10.1016/j.fuel.2018.07.131
  7. Malaquias, B.; Flores, V.I.; Bagatini, M. Effect of High Petroleum Coke Additions on Metallurgical Coke Quality and Optical Texture. REM – International Engineering Journal 2020, 73. https://doi.org/10.1590/0370-44672019730097
  8. Larionov, K.; Mishakov, I.; Slyusarskiy, K.; Vedyagin, A.A. Intensification of Bituminous Coal and Lignite Oxidation by Copper-Based Activating Additives. Int J Coal Sci Technol. 2021, 8, 141–153. https://doi.org/10.1007/s40789-020-00350-z
  9. Shmeltser, E.O.; Lyalyuk, V.P.; Sokolova, V.P.; Miroshnichenko, D.V. The Using of Coal Blends with an Increased Content of Coals of the Middle Stage of Metamorphism for the Production of the Blast-Furnace Coke. Мessage 1. Рreparation of Coal Blends. Pet. Coal 2018, 60, 605–611.
  10. Gunka, V.; Shved, M.; Prysiazhnyi, Y.; Pyshyev, S.; Miroshnichenko, D. Lignite Oxidative Desulphurization: Notice 3– Process Technological Aspects and Application of Products. Int J Coal Sci Technol. 2019, 6, 63–73. https://doi.org/10.1007/s40789- 018-0228-z
  11. Shved, M.; Pyshyev, S.; Prysiazhnyi, Y. Effect of Oxidant Relative Flow Rate on Obtaining Raw Material for Pulverized Coal Production from High-Sulfuric Row Grade Coal. Chem. Chem. Technol. 2017, 11, 236–241. https://doi.org/10.23939/chcht11.02.236
  12. Zelenskii, O.I. Modern Trends in the Use of Nonmetallurgical Additives in the Coke Production. J. Coal Chem. 2023, 3, 21–28.
  13. Nag, D.; Karmakar, Sh.; Burgula, L.; Dash, J.; Dash P.S.; Ghorai S. Use of Organic Polymers for Improvement of Coking Potential of Poorcoking Coal. Int. J. Coal Prep. Util. 2020, 40, 427– 437. https://doi.org/10.1080/19392699.2019.1686365
  14. Zelenskii, O.; Vasil’ev, Y.; Sytnik, A.; Desna, N.; Spirina, E.; Grigorov, A. Metallurgical Cokemaking with the Improved Physicochemical Parameters at Avdeevka Coke Plant. Chem. J. Mold. 2018, 13, 32–37. https://doi.org/10.19261/cjm.2018.516
  15. Wu, Q.; Sun, C.; Zhu, Z.-Z.; Wang, Y.-D.; Zhang, C.-Y. Effects of Boron Carbide on Coking Behavior and Chemical  Structure of High Volatile Coking Coal during Carbonization. Materials 2021, 14, 302. https://doi.org/10.3390/ma14020302
  16. Kumar, A.; Kaur, M.; Kumar, R.; Sengupta, P.R.; Raman V.; Bhatia, G. Effect of Incorporating Nano Silicon Carbide on the Properties of Green Coke Based Monolithic Carbon. Indian J. Eng. Mater. Sci. 2010, 17, 353–357.
  17. Jayakumari, S.; Tangstad, M. Transformation of β-SiC from Charcoal, Coal, and Petroleum Coke to α-SiC at Higher Temperatures. Metall Mater Trans B 2020, 51, 2673–2688. https://doi.org/10.1007/s11663-020-01970-1
  18. Tomas, Р.; Manoj, B. Dielectric Performance of Graphene Nanostructures Prepared from Naturally Sourced Material. Mater. Today: Proc. 2021, 43, 3424–3427. https://doi.org/10.1016/j.matpr.2020.09.075
  19. Miroshnichenko, D.V.; Saienko, L.; Demidov, D.; Pyshyev, S.V. Predicting the Yield of Coke and its Byproducts on the Basis of Ultimate and Petrographic Analysis. Pet. Coal 2018, 60, 402–415.
  20. Miroshnichenko, D.V.; Saienko, N.; Popov, Y.; Demidov, D.; Nikolaichuk, Y.V. Preparation of Oxidized Coal. Pet. Coal 2018, 60, 113–119.
  21. Barsky, V.; Vlasov, G.; Rudnitsky, A. Composition and Structure of Coal Organic Mass. 3. Dinamics of Coal Chemical Structure During Metamorphism. Chem. Chem. Technol. 2011, 5, 285–290. https://doi.org/10.23939/chcht05.03.285
  22. Pyshyev, S.; Zbykovskyy, Y.; Shvets, I.; Miroshnichenko, D.; Kravchenko, S.; Stelmachenko, S.; Demchuk, Y.; Vytrykush N. Modeling of Coke Distribution in a Dry Quenching Zon. ACS Omega. 2023, 8, 19464–19473. https://doi:10.1021/acsomega.3c00747
  23. Pyshyev, S.; Prysiazhnyi, Y.; Miroshnichenko, D.; Bilushchak, H.; Pyshyeva, R. Desulphurization and Usage of Medium-Metamorphized Black Coal. 1. Determination of the Optimal Conditions for Oxidative Desulphurization. Chem. Chem. Technol. 2014, 8, 225–234. https://doi.org/10.23939/chcht08.02.225
  24. Flores, B.D.; Flores, I.V.; Guerrero, A.; Orellana, D.R.; Pohlmann, J.G.; Díez, M.A.; Borrego, A.G.; Osório, E.; Vilela, A.C.F. On the Reduction Behavior, Structural and Mechanical Features of Iron Ore-Carbon Briquettes. Fuel Process. Technol. 2017, 155, 238–245. https://doi.org/10.1016/j.fuproc.2016.07.004