Effect of high temperature on macroscopic properties and microstructure of metallurgical coke

Fu, Xiaowei; Pang, Qinghai; Yang, Xin; Zhan, Wenlong; He, Zhijun

doi:10.1016/j.fuel.2023.129543

Cited by 8 publications

(2 citation statements)

References 41 publications

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“…The authors of [28] studied the effect of high temperature on the macroscopic properties and microstructure two types of coke (tamping coke (T-coke) and top-charging coke (TCcoke)). The study was conducted in the temperature range of 1100-1400 • C, i.e., in conditions close to blast furnace melting.…”

Section: Discussionmentioning

confidence: 99%

Electrical Resistance as an Aggregate Characteristic of Coke Properties for Electrochemical and Coke Production

Miroshnichenko,

Shmeltser,

Kormer

et al. 2024

Electrochem

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The influence of the component composition of coal batches and the final temperature of the coking process on the resistivity of coke was studied. Taking into account that the resistivity and reactivity are influenced by some common factors, such as the temperature level and coke readiness, which indicates the orderliness of its structure, the relationship between these indicators was established. The electrical resistivity can be considered a cumulative characteristic of coke properties, as evidenced by the mathematical dependencies of the change electrical resistance on the ash content, sulfur content, volatile yield, and petrographic composition. Analysis of the dependencies and their statistical evaluation indicate that the studied relationships are characterized by high values of correlation (0.6–0.84). The proposed regression equations can be recommended for optimizing the component composition and quality of production batches, given their significant impact on the resistivity of coke. This is especially relevant when coke is used in electrothermal processes, since the productivity and the electrical and thermal efficiency of the furnace depends on the resistivity of the coke in electrochemical processes in which carbon materials are used as anodes and lining elements and in the production of capacitor technology. As the resistivity test requires much less time to perform than the reactivity test, it can be considered as an alternative approach to the reactivity testing currently performed for quality control purposes.

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Section: Discussionmentioning

confidence: 99%

Electrical Resistance as an Aggregate Characteristic of Coke Properties for Electrochemical and Coke Production

Miroshnichenko,

Shmeltser,

Kormer

et al. 2024

Electrochem

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“…The comparable values of d 002 prevent us from making decisive assessments regarding the impact of microstructure on explaining combustion characteristics. On the other hand, the L a index indicates that coke has slightly better microstructural properties [38,39] compared to biocokes.…”

Section: Thermogravimetric Characters Of Carbon Sourcesmentioning

confidence: 99%

Biocoke Thermochemical Properties for Foamy Slag Formations in Electric Arc Furnace Steelmaking

Kieush,

Schenk,

Koveria

et al. 2023

Metals

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This paper is devoted to studying the thermochemical properties of carbon sources (laboratory-scale conventional coke, biocoke with 5 wt.%, and 10 wt.% wood pellet additions) and the influence of these properties on foamy slag formations at 1600 °C. Thermogravimetric analysis (TGA) conducted under air unveiled differences in mass loss among carbon sources, showing an increasing order of coke < biocoke with 5 wt.% wood pellets < biocoke with 10 wt.% wood pellets. The Coats–Redfern method was used to calculate and reveal distinct activation energies among these carbon sources. Slag foaming tests performed using biocoke samples resulted in stable foam formation, indicating the potential for biocoke as a carbon source to replace those conventionally used for this process. Slag foaming characters for biocoke with 5 wt.% wood pellets were improved more than coke. Using biocoke with 10 wt.% wood pellets was marginally worse than coke. On the one hand, for biocoke with 5 wt.% wood pellets, due to increased reactivity, the foaming time was reduced, but it was sufficient and optimal for slag foaming. Conversely, biocoke with 10 wt.% wood pellets reduced foaming time, proving insufficient and limiting the continuity of the foaming. This study highlights that thermochemical properties play a significant role, but comprehensive assessment should consider multiple parameters when evaluating the suitability of unconventional carbon sources for slag foaming applications.

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The process and mechanism of coke gasification dissolution loss in hydrogen-rich blast furnace

Deng,

Yao,

et al. 2024

Chemical Engineering Journal

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Effect of high temperature on macroscopic properties and microstructure of metallurgical coke

Cited by 8 publications

References 41 publications

Electrical Resistance as an Aggregate Characteristic of Coke Properties for Electrochemical and Coke Production

Electrical Resistance as an Aggregate Characteristic of Coke Properties for Electrochemical and Coke Production

Biocoke Thermochemical Properties for Foamy Slag Formations in Electric Arc Furnace Steelmaking

The process and mechanism of coke gasification dissolution loss in hydrogen-rich blast furnace

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