ISSN 2594-357X
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Lump coals are used in COREX process as the mainly fuel, but it is still necessary to feed a certain amount of coke to support burden and maintain adequate char bed permeability in melter gasifier. Tuyere coke samples are obtained by means of tuyere probing technology. Then, particle size analysis, microstructure analysis, permeability analysis and determination of the hot performance of tuyere coke have been undertaken to investigate coke degradation and behavior of lump coals. Results show that larger particles (>10 mm) of tuyere coke samples are mostly from charged coke deterioration and the smaller ones (<10 mm) are mostly from lump coal pyrolysis. Moreover, reducing gases produced by lump coal combustion could promote solution loss reaction leading to coke degradation. The physical and high temperature properties of char are inferior to that of charged cokes. The mainly parameter influencing char bed permeability is the char deterioration. Finally, combined with the former results, several measures are proposed to decrease the energy consumption of Corex process.
Lump coals are used in COREX process as the mainly fuel, but it is still necessary to feed a certain amount of coke to support burden and maintain adequate char bed permeability in melter gasifier. Tuyere coke samples are obtained by means of tuyere probing technology. Then, particle size analysis, microstructure analysis, permeability analysis and determination of the hot performance of tuyere coke have been undertaken to investigate coke degradation and behavior of lump coals. Results show that larger particles (>10 mm) of tuyere coke samples are mostly from charged coke deterioration and the smaller ones (<10 mm) are mostly from lump coal pyrolysis. Moreover, reducing gases produced by lump coal combustion could promote solution loss reaction leading to coke degradation. The physical and high temperature properties of char are inferior to that of charged cokes. The mainly parameter influencing char bed permeability is the char deterioration. Finally, combined with the former results, several measures are proposed to decrease the energy consumption of Corex process.
Palavras-chave
Corex melter gasifier; Tuyere coke; Degradation; Hot performance.
Corex melter gasifier; Tuyere coke; Degradation; Hot performance.
Como citar
Wu, Keng;
Zhan, Wenlong;
Fu4, Ping;
Liu, Qihang;
Qu, Junjie;
Wang, Chongmao.
STUDY ON THE DEGRADATION OF TUYERE COKE IN
COREX MELTER GASIFIER
,
p. 2754-2760.
In: 42º Seminário de Redução de Minério de Ferro e Matérias-primas / 13º Seminário Brasileiro de Minério de Ferro / 6th International Congress on the Science and Technology of Ironmaking,
Rio de Jabeiro,
2012.
ISSN: 2594-357X
, DOI 10.5151/2594-357X-22692
