SiC and Ferro-silicides Formation in Tuyere Cokes

Ye, ZhuoZhu; Gupta, Sushil K.; Kerkkonen, Olavi; Kanniala, Riku; Sahajwalla, Veena

doi:10.2355/isijinternational.53.181

Cited by 28 publications

(14 citation statements)

References 16 publications

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“…Ye Z. Z. et al 8) examined the phase of ferro-silicon and quantified the formation of silicon carbide in coke samples at tuyere level. SiC was found to be present mainly in the bosh and raceway cokes and Si was also detected in association with metallic iron forming ferro-silicide alloys.…”

Section: Coke Microstructure and Graphitization Across The Hearth Deamentioning

confidence: 99%

Coke Microstructure and Graphitization Across the Hearth Deadman Regions in a Commercial Blast Furnace

et al. 2019

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Section: Coke Microstructure and Graphitization Across The Hearth Deamentioning

confidence: 99%

Coke Microstructure and Graphitization Across the Hearth Deadman Regions in a Commercial Blast Furnace

et al. 2019

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“…To be able to estimate the state of the hearth, some models for calculating the remaining sound lining and the amount of scaffold on the bottom and sidewall based on thermocouple readings has been developed. [10][11][12][13] For example, Keisuke et al 14) reported on the use of the scaffold thickness to monitor the hearth lining and to take control actions against erosion. But the information of the scaffold such as the thermal conductivity is hypothetical.…”

Section: Characterization and Properties Of Scaffold In A Dissected Bmentioning

confidence: 99%

Characterization and Properties of Scaffold in a Dissected Blast Furnace Hearth

et al. 2019

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“…Carbothermal reduction of SiO 2 to SiO and SiC significantly contributed to the weight loss at high temperatures; 9) the reaction of other minerals with low content, such as Fe bearing minerals, also made contribution to the weight loss during annealing. 19) …”

Section: Reactions Of Cokes During Annealing and Gasifica-mentioning

confidence: 99%

Coke Degradation under Simulated Blast Furnace Conditions

Xing

Rogers²,

Zhang

et al. 2016

ISIJ Int.

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Three metallurgical cokes made from coking coals over a significant range in rank were subjected to treatment with blast furnace-like gas composition-temperature profile to 1 673 K, annealing under N 2 to 2 273 K and gasification with subsequent annealing at 1 873 and 2 273 K. The degradation of cokes after reaction and annealing was characterised using I-drum tumbling, tensile testing, ultra-micro indentation and X-ray diffraction. Both gasification and annealing decreased the mechanical strength of coke. Compared with annealing at 1 673 K, gasification at same temperature caused larger degradation for all three cokes, and the effect was more significant on more reactive coke. In the annealing process, degradation of the cokes occurred through the entire coke lump and resulted in both tensile strength and I-drum tumbling strength decreasing simultaneously. In the process of gasification under the blast furnace-like conditions, degradation took place through the whole piece of coke with high reactivity; however, the degradation of coke with low reactivity was more severe at the periphery than in the core and therefore gasification had a minimal effect on the core of the coke and its tensile strength, but had a much stronger effect on I * 600 . Microstrength of coke decreased significantly with increasing annealing temperature. The change of microstrength of coke upon gasification, which occurred at relatively low temperatures, was marginal. The cokes after gasification with subsequent annealing had similar microstrength and graphitisation degree compared to those subjected only to annealing at the same temperature.

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SiC and Ferro-silicides Formation in Tuyere Cokes

Cited by 28 publications

References 16 publications

Coke Microstructure and Graphitization Across the Hearth Deadman Regions in a Commercial Blast Furnace

Coke Microstructure and Graphitization Across the Hearth Deadman Regions in a Commercial Blast Furnace

Characterization and Properties of Scaffold in a Dissected Blast Furnace Hearth

Coke Degradation under Simulated Blast Furnace Conditions

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