Stamp-Charged Coke-Making Technology—The Effect of Charge Density and the Addition of Semi-Soft Coals on the Structural, Textural and Quality Parameters of Coke

Michał Rejdak, Andrzej Strugała and Aleksander Sobolewski
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Michał Rejdak: Department of Cokemaking Technologies, Institute for Chemical Processing of Coal, 1 Zamkowa Street, 41-803 Zabrze, Poland
Andrzej Strugała: Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30 av., 30-059 Krakow, Poland
Aleksander Sobolewski: Department of Cokemaking Technologies, Institute for Chemical Processing of Coal, 1 Zamkowa Street, 41-803 Zabrze, Poland

Energies, 2021, vol. 14, issue 12, 1-31

Abstract: Coke is an integral component of the blast furnace charge; therefore, it plays an important role in the integrated steelmaking process. Achieving the required coke quality parameters by producers requires the use of a high proportion of the highest quality coking coals (hard coking coals) in the coking blends, which significantly increases the unit production costs. Approximately 75% of these costs are constituted by the cost of the coal blend’s preparation. There is a deficit in the best quality coking coals on the world market and their supply are characterized by large fluctuations in quality parameters. Therefore, from the point of view of the economics of coke production, it is advantageous to produce high-quality coke from a coke blend with the highest possible content of cheaper coals. The paper presents the results of the influence of coal charge bulk density and semi-soft coking coal content in the coking blend on the textural and structural parameters of coke, which determine its quality. Research has shown that the application of increased density influences the parameters of the texture and structure of the coke, which shape its quality parameters. The use of stamp-charging technology contributes to the improvement of the coke quality or enables the production of coke of a predetermined quality from blends containing cheaper semi-soft coals.

Keywords: CSR; CRI; coke quality; coke making; stamp charging; bulk density; structure; hard coking coal; semi-soft coal (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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