Results of tuyere coke sampling with regard to application of appropriate coke strength after reaction (CSR) for a blast furnace
Raising pulverized coal injection (PCI) will decrease coke rate, but increase the residence time of coke and abrasion in the blast furnace (BF). Thus, insufficient coke strength will generate more coke fines in the lower BF and result in lower permeability and production of hot metal (HM)....
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, Technical Faculty, Bor
2017-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391700003S.pdf |
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| Summary: | Raising pulverized coal injection (PCI) will decrease coke rate, but increase
the residence time of coke and abrasion in the blast furnace (BF). Thus,
insufficient coke strength will generate more coke fines in the lower BF and
result in lower permeability and production of hot metal (HM). For
understanding the behavior of coke at various HM productivities, a tuyere
coke sampler was used to collect the coke samples for measuring the coke
strength. Firstly, the difference of sampled coke under the conditions of
various HM productivities was explored. Secondly, the BF operating conditions
and causes of generating more coke fines was correlated by testing the coke
reaction rate after reaction. Finally, according to the above analysis
results, the relative regression equations had been obtained for sampling
coke properties, BF operation conditions and BF permeability. Furthermore,
the coke strength after reaction (CSR) quantitative target and its online
system at various blast conditions were set to provide some reference for
coke and HM production. |
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| ISSN: | 1450-5339 2217-7175 |