Influence of particle size on combustion behavior of bamboo char used for blast furnace injection
Run-sheng Xu1,2 . Wei Wang1,2 . Bo-wen Dai1,2
1 State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
Influence of particle size on combustion behavior of bamboo char used for blast furnace injection
Run-sheng Xu1,2 . Wei Wang1,2 . Bo-wen Dai1,2
1 State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
摘要 The combustion behavior of bamboo char and its relationship with particle sizes were evaluated using thermo-gravimetric analysis. The results showed that the combustion properties of bamboo char were much better than those of the anthracite used as a coal injected for blast furnace ironmaking due to its porous structure, disordered microcrystalline and higher catalytic index of ash minerals. When the particle size increased from - 0.074 to 0.500–1.000 mm, the ignition temperature and burnout temperature of bamboo char increased, while the combustible index and comprehensive combustion characteristic index decreased slightly. The apparent activation energies of non-isothermal combustion of bamboo char and anthracite were calculated based on the distributed activation energy model. The results showed that the average activation energy was 162.86 kJ/mol for - 0.074 mm anthracite, while it ranged from 71.01 to 89.44 kJ/mol for bamboo chars of different sizes. It revealed that the combustion reactivity of bamboo char in the largest size (0.500–1.000 mm) was much better than that of - 0.074 mm anthracite; thus, the size of biomass char could be enlarged to the maximum size specified by the injection application of blast furnace.
Abstract:The combustion behavior of bamboo char and its relationship with particle sizes were evaluated using thermo-gravimetric analysis. The results showed that the combustion properties of bamboo char were much better than those of the anthracite used as a coal injected for blast furnace ironmaking due to its porous structure, disordered microcrystalline and higher catalytic index of ash minerals. When the particle size increased from - 0.074 to 0.500–1.000 mm, the ignition temperature and burnout temperature of bamboo char increased, while the combustible index and comprehensive combustion characteristic index decreased slightly. The apparent activation energies of non-isothermal combustion of bamboo char and anthracite were calculated based on the distributed activation energy model. The results showed that the average activation energy was 162.86 kJ/mol for - 0.074 mm anthracite, while it ranged from 71.01 to 89.44 kJ/mol for bamboo chars of different sizes. It revealed that the combustion reactivity of bamboo char in the largest size (0.500–1.000 mm) was much better than that of - 0.074 mm anthracite; thus, the size of biomass char could be enlarged to the maximum size specified by the injection application of blast furnace.
XU Run-Sheng,WEI -Wang,BOWEN -Dai. Influence of particle size on combustion behavior of bamboo char used for blast furnace injection[J]. Journal of Iron and Steel Research International, 2018, 25(12): 1213-1222.
[1]
Wang W, Energy saving in steel production technology, Proceedings of 2013 China National Metallurgical Energy, Environmental Protection and Production Technology, ( 2013) 7-13.
[2]
Xu K, Iron and Steel, 45(2010): 1-12.
[3]
Li K, Zhang J, Zhang Y, Liu Z, Jiang X, The Chinese Journal of Process Engineering, 14(2014):28-38.
[4]
Atkinson C J, Fitzgerald J D, Hipps N A, Plant Soil, 337(2010):1-18.
Braga R, Goncalves H T, Santiago R, Metal. ABM, 42(1986): 389-394.
[10]
Nascimento R, Almeida A, Oliveira E, De Jesus A, De Moraes A, Proceedings of 3rd International Meeting on Ironmaking and the 2nd International Symposium on Iron Ore, 3(2008): 845-856.
[11]
Bi X, Rao C, Peng W, Henan Metallurgy. 20(2012):1-5.
[12]
Hanrot F, Sert D, Delinchant J, Delinchant J, Pietruck R, Bürgler T, Babich A, Fernández M, Alvarez R, Diez M A, 1st Spanish National Conference on Advances in Materials Recycling and Eco-Energy, (2009):181-184.
[13]
Machado J, Osório E, Vilela A, Steel Res. Int., 81(2010): 9-16.
[14]
Assis P, De Assis C, Mendes H, AISTech 2009-Proceedings of the Iron and Steel Technology Conference, 1(2009): 345-353.
[15]
Zhang J, The 7th Korea-China Joint Symposium on Advanced Steel Technology Jeju, Korea, 8(2015): 26-28.
[16]
Zhang J, Wang G, Xu R, Zheng C, Guo J, Zhao D, Song T, 2015 Metallurgical Innvoation Symposium,11(2015): 25-27.
[17]
Liu Z, Mi B,Wei P, Jiang Z, Fei B, Liu X, Eur. J. Wood Prod., 74(2015): 1-5.
[18]
Kumar R, Chandrashekar N, Forestry Research, 25(2014): 471-476.
[19]
Xu Q, Chen L, Harries K A, Li X, Eur. J. Wood Prod., 75(2016): 1-13.
[20]
Yang W, Wang H, Zhang M, Zhu J, Zhou J, Wu S, Bioresour. Technol., 205(2016): 199-204.
[21]
Mi B, Liu Z, Hu W, Wei P, Jiang Z, Fei B, Bioresour. Technol., 209(2016): 50-55.
[22]
Liu Z, Hu W, Jiang Z, Mi B, Fei B, Renewable Energy, 87(2016): 346-352.
[23]
Liu Z, Jiang Z, Fei B, Cai Z, Liu X, Yu Y, Sci. Silvae Sin, 48(2012): 133-139.
[24]
Wang H, Zhang J, Wang G, Zhao D, Guo J, Song T, Energies.10(2017 )(online).
[25]
Wang G, Zhang J, Shao J, Liu Z, Zhang G, Xu T, Energy Convers. Manage, 124(2016): 414-426.
[26]
Zhao D, Zhang J, Wang G, Conejo A N, Xu R, Wang H, Appl. Therm. Eng., 108(2016): 1168-1177.
[27]
Fan C, Yan J, Huang Y, Han X, Jiang X, Fuel, 139(2015): 502-510.
[28]
Wang L, Guo Y, Zhu Y, Qu Y, Li Y, Rong C, Thermochim. Acta., 512(2011): 254-257.
[29]
Cai J, Wang S, Kuang C, Tang X, Fuel, 203(2017): 501-513.