Protective mechanism of unburned pulverized coal to coke in blast furnace
The edge and internal morphology of coke with different contents of UPC (unburned pulverized coal) after reaction with CO2 were analyzed by SEM. The influence of UPC on CRI (coke reactivity)，CSR (coke strength after reaction) and apparent porosity was also studied. The synthetic weighted mark method...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2019-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2019/1450-53391900041X.pdf |
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| author | Xiang D.-W. Shen F.-M. Jiang X. Yang J.-L. Li X.-J. Gao Q.-J. |
| author_facet | Xiang D.-W. Shen F.-M. Jiang X. Yang J.-L. Li X.-J. Gao Q.-J. |
| author_sort | Xiang D.-W. |
| collection | DOAJ |
| description | The edge and internal morphology of coke with different contents of UPC (unburned pulverized coal) after reaction with CO2 were analyzed by SEM. The influence of UPC on CRI (coke reactivity)，CSR (coke strength after reaction) and apparent porosity was also studied. The synthetic weighted mark method was used to analyze the comprehensive effect of UPC content on coke quality. The results show that because of the decrease of the content of intermediates Cf(O) and C(O)Cf(O) the restrictive step between the coke and CO2 is an interfacial chemical reaction, and it accords with the Mckewan equation 1-(1-α)1/3=kt. The UPC has a strong effect on coke when the content of UPC is 10~20%; meanwhile , the CRI and the apparent porosity are significantly decreased by 6.8% and 9.5%, respectively, and the CSR is significantly increased by 3.8%. The UPC can effectively reduce the effect of CO2 on the edge and the internal erosion of coke; the large pores and the pulverization of coke were avoided. The results of the synthetic weighted mark method showed that the comprehensive quality of coke changed greatly when the content of unburned pulverized coal was 11.24~20.87%, which is in agreement with the experimental results. |
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| issn | 1450-5339 2217-7175 |
| language | English |
| last_indexed | 2025-02-16T12:59:40Z |
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| publisher | University of Belgrade, Technical Faculty, Bor |
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| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj.art-ccef68a3535d4ea092fcf02e9b6be5a42025-02-02T17:15:04ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752019-01-0155337138010.2298/JMMB181229041X1450-53391900041XProtective mechanism of unburned pulverized coal to coke in blast furnaceXiang D.-W.0Shen F.-M.1Jiang X.2Yang J.-L.3Li X.-J.4Gao Q.-J.5Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education),Northeastern University, Shenyang, Liaoning, P.R. ChinaKey Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), NortheasternUniversity, Shenyang, Liaoning, P.R. ChinaKey Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, Liaoning, P.R. ChinaSchool of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, Anhui, ChinaSchool of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, Anhui, ChinaKey Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, P. R. ChinaThe edge and internal morphology of coke with different contents of UPC (unburned pulverized coal) after reaction with CO2 were analyzed by SEM. The influence of UPC on CRI (coke reactivity)，CSR (coke strength after reaction) and apparent porosity was also studied. The synthetic weighted mark method was used to analyze the comprehensive effect of UPC content on coke quality. The results show that because of the decrease of the content of intermediates Cf(O) and C(O)Cf(O) the restrictive step between the coke and CO2 is an interfacial chemical reaction, and it accords with the Mckewan equation 1-(1-α)1/3=kt. The UPC has a strong effect on coke when the content of UPC is 10~20%; meanwhile , the CRI and the apparent porosity are significantly decreased by 6.8% and 9.5%, respectively, and the CSR is significantly increased by 3.8%. The UPC can effectively reduce the effect of CO2 on the edge and the internal erosion of coke; the large pores and the pulverization of coke were avoided. The results of the synthetic weighted mark method showed that the comprehensive quality of coke changed greatly when the content of unburned pulverized coal was 11.24~20.87%, which is in agreement with the experimental results.http://www.doiserbia.nb.rs/img/doi/1450-5339/2019/1450-53391900041X.pdfunburned pulverized coalcoke reactivitycoke strength after reactionapparent porositythe synthetic weighted mark method |
| spellingShingle | Xiang D.-W. Shen F.-M. Jiang X. Yang J.-L. Li X.-J. Gao Q.-J. Protective mechanism of unburned pulverized coal to coke in blast furnace Journal of Mining and Metallurgy. Section B: Metallurgy unburned pulverized coal coke reactivity coke strength after reaction apparent porosity the synthetic weighted mark method |
| title | Protective mechanism of unburned pulverized coal to coke in blast furnace |
| title_full | Protective mechanism of unburned pulverized coal to coke in blast furnace |
| title_fullStr | Protective mechanism of unburned pulverized coal to coke in blast furnace |
| title_full_unstemmed | Protective mechanism of unburned pulverized coal to coke in blast furnace |
| title_short | Protective mechanism of unburned pulverized coal to coke in blast furnace |
| title_sort | protective mechanism of unburned pulverized coal to coke in blast furnace |
| topic | unburned pulverized coal coke reactivity coke strength after reaction apparent porosity the synthetic weighted mark method |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2019/1450-53391900041X.pdf |
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