Effect of coke powder and semi-coke on combustion characteristics of blast furnace blended coal
PENG Zheng-fu1, ZHANG Jian-liang1, BI Chuan-guang2, NING Xiao-jun1, TAN Pei-long2, WANG Guang-wei1
1. School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. Technology Center, Shanghai Meishan Iron and Steel Co., Ltd., Nanjing 210039, Jiangsu, China
Abstract:In order to explore the effect of injection of coke and semi-coke instead of anthracite on the combustion of blended coal,using the new blast furnace coal injection combustion simulation experimental device and thermogravimetric analysis equipment, the effects of coke powder, semi-coke and coal blending particle size on the combustion of blended coal were studied. The appearance of unburned coal powder was observed by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The mechanism and influencing factors of coal blending combustion were analyzed from the perspective of the coal powder combustion process and coal structure. The results show that the particle size reduction has a promoting effect on combustion. The particle size of coke powder used for injection should be less than 0.074 mm. Semi-coke and coke powder have different effects on coal blending, semi-coke has no obvious effect on the replacement of anthracite, but the effect of coke powder is obvious. When the amount of coke powder added exceeds 15%, the combustion performance of the blended coal decreases sharply. The effect of semi-coke and coke breeze on the combustibility of blended coal is different, mainly because of the different chemical properties and structures of semi-coke and coke. Considering the combustion performance of blended coal, it is acceptable to use a small amount of coke powder instead of anthracite for the blast furnace injection.
彭政富, 张建良, 毕传光, 宁晓钧, 谭培龙, 王广伟. 焦粉与兰炭对高炉混煤燃烧特性的影响[J]. 钢铁, 2019, 54(12): 10-18.
PENG Zheng-fu, ZHANG Jian-liang, BI Chuan-guang, NING Xiao-jun, TAN Pei-long, WANG Guang-wei. Effect of coke powder and semi-coke on combustion characteristics of blast furnace blended coal. Iron and Steel, 2019, 54(12): 10-18.
陈川, 程树森. 高炉煤粉燃烧率通用模型[J]. 北京科技大学学报, 2014, 36(2):226. (CHEN Chuan, CHENG Shun-sen. General model of pulverized coal combustion ratio in blast furnaces[J]. Journal of University of Science and Technology Beijing, 2014, 36(2):226.)
[1]
王筱留. 钢铁冶金学(炼铁部分)[M]. 北京:冶金工业出版社,2001. (WANG Xiao-liu. Metallurgy of Iron and Steel (Iron-making) [M]. Beijing: Metallurgical Industry Press,2001.)
[7]
张琢, 谢峰, 郑义, 等. 焦炭的微晶结构及其对反应性的影响[J]. 燃料化学学报, 2018, 46(4):406. (ZHANG Zhuo, XIE Feng, ZHENG Yi, et al. Coke microcrystalline texture and its effect on coke reactivity[J]. Journal of Fuel Chemistry and Technology, 2018, 46(4):406.)
[2]
王广伟, 张建良, 左海滨,等. 粒径对煤粉燃烧特性的影响及动力学分析[J]. 冶金能源,2014, 33(2):49. (WANG Gang-wei, ZHANG Jian-liang, ZUO Hai-bin,et al. Study on the combustion characteristics and kinetics of pulverized coal with different particle size[J]. Metallurgical Energy, 2014, 33 (2): 49.)
[8]
吴铿, 折媛, 刘起航, 等. 高炉大型化后对焦炭性质及在炉内劣化的思考[J]. 钢铁, 2017, 52(10):1. (WU Keng, SHE Yuan, LIU Qi-hang,et al. Consideration on properties of coke and coke deterioration after large-scale blast furnace[J]. Iron and Steel, 2017, 52(10):1.)
[3]
王海洋, 张建良, 王广伟, 等. 褐煤用于高炉喷吹的可行性[J]. 钢铁研究学报, 2017, 29(1):39. (WANG Hai-yang, ZHANG Jian-Liang, WANG Gang-wei,et al. Feasibility research of brown coal injection for blast furnace[J]. Journal of Iron and Steel Research, 2017, 29(1):39.)
[9]
姜秀民, 李巨斌, 邱健荣, 等. 超细煤粉的物理特性及其对燃烧性能的影响[J]. 燃料化学学报, 2000 (2):170. (JIANG Xiu-min, LI Ju-bin, QIU Jian-rong,et al. Physical properties of micro-pulverized coal and their effects on combustion characteristics[J]. Journal of Fuel Chemistry and Technology, 2000(2):170.)
[4]
王凯迪, 张建良, 王广伟, 等. 欧洲生物质半焦与煤混合燃烧特性分析[J]. 中国冶金, 2018, 28(9):12. (WANG Kai-di, ZHANG Jian-liang, WANG Guang-wei,et al. Analysis of co-combustion characteristics of European biomass char and coal[J]. China Metallurgy, 2018, 28(9):12.)
[10]
巩黎伟.太钢高炉喷吹兰炭煤生产实践[J]. 炼铁, 2018, 37(5):16. (GONG Li-wei. Semi-coke coal injection practice in Taiyuan Steel′s BF[J]. Ironmaking, 2018, 37(5):16.)
[11]
杨双平, 郭拴全, 张攀辉,等. 兰炭对高炉混煤喷吹特性的影响[J]. 钢铁研究学报, 2017, 29(3):201. (YANG Shuang-ping, GUO Shuan-quan, ZHANG Pan-hui,et al. Influence of semi-coke on blending coal injection characteristics for blast furnace[J]. Journal of Iron and Steel Research, 2017, 29(3):201.)
[12]
张建良, 黄冬华, 张曦东, 等. 新型高炉喷煤模拟燃烧实验装置设计[J]. 北京科技大学学报, 2009, 31(5):633.(ZHANG Jian-liang, HUANG Dong-hua, ZHANG Xi-dong, et al. Design of an experimental device to simulate coal injection in blast furnaces[J]. Journal of University of Science and Technology Beijing, 2009, 31(5):633.)
[5]
CONG K, HAN F, ZHANG Y, et al. The investigation of co-combustion characteristics of tobacco stalk and low rank coal using a macro-TGA[J]. Fuel, 2019, 237:126.
[13]
CHAI Yi-fan, ZHANG Jian-liang, SHAO Qiu-jun,et al. Experiment research on pulverized coal combustion in the tuyere of oxygen blast furnace[J]. High Temperature Materials and Processes, 2016, 35(1):73.
[14]
李杰,宋灿阳,李小静,等. 高炉喷吹煤粉燃烧性与反应性的研究与应用[J]. 中国冶金,2019,29(1):8. (LI Jie, SONG Can-yang, LI Xiao-jing,et al. Research and application of combustibility and reactivity of pulverized coal injected in blast furnace[J]. China Metallurgy, 2019,29(1):8.)
[6]
陈川, 程树森. 高炉煤粉燃烧率通用模型[J]. 北京科技大学学报, 2014, 36(2):226. (CHEN Chuan, CHENG Shun-sen. General model of pulverized coal combustion ratio in blast furnaces[J]. Journal of University of Science and Technology Beijing, 2014, 36(2):226.)
[15]
高鹏, 赵丹宁, 王平, 等. 马钢4 000 m3高炉喷吹煤粉燃烧性能研究与应用[J]. 钢铁, 2018, 53(12):10. (GAO Peng, ZHAO Dan-ning, WANG Ping,et al. Study and application on combustibility of pulverized coal injection at 4 000 m3 BF of Masteel[J]. Iron and Steel, 2018, 53(12):10.)
[7]
张琢, 谢峰, 郑义, 等. 焦炭的微晶结构及其对反应性的影响[J]. 燃料化学学报, 2018, 46(4):406. (ZHANG Zhuo, XIE Feng, ZHENG Yi, et al. Coke microcrystalline texture and its effect on coke reactivity[J]. Journal of Fuel Chemistry and Technology, 2018, 46(4):406.)
[8]
吴铿, 折媛, 刘起航, 等. 高炉大型化后对焦炭性质及在炉内劣化的思考[J]. 钢铁, 2017, 52(10):1. (WU Keng, SHE Yuan, LIU Qi-hang,et al. Consideration on properties of coke and coke deterioration after large-scale blast furnace[J]. Iron and Steel, 2017, 52(10):1.)
[16]
邢相栋, 王莎, 张秋利, 等. 高炉喷吹废塑料与兰炭混合燃烧及动力学[J].钢铁研究学报, 2019, 31(3):258. (XING Xiang-dong, WANG Sha, ZHANG Qiu-li,et al. Mixed combustion and kinetics of waste plastics injected into blast furnace and anthracite[J]. Journal of Iron and Steel Research, 2019, 31(3):258.)
[9]
姜秀民, 李巨斌, 邱健荣, 等. 超细煤粉的物理特性及其对燃烧性能的影响[J]. 燃料化学学报, 2000 (2):170. (JIANG Xiu-min, LI Ju-bin, QIU Jian-rong,et al. Physical properties of micro-pulverized coal and their effects on combustion characteristics[J]. Journal of Fuel Chemistry and Technology, 2000(2):170.)
[10]
巩黎伟.太钢高炉喷吹兰炭煤生产实践[J]. 炼铁, 2018, 37(5):16. (GONG Li-wei. Semi-coke coal injection practice in Taiyuan Steel′s BF[J]. Ironmaking, 2018, 37(5):16.)
[11]
杨双平, 郭拴全, 张攀辉,等. 兰炭对高炉混煤喷吹特性的影响[J]. 钢铁研究学报, 2017, 29(3):201. (YANG Shuang-ping, GUO Shuan-quan, ZHANG Pan-hui,et al. Influence of semi-coke on blending coal injection characteristics for blast furnace[J]. Journal of Iron and Steel Research, 2017, 29(3):201.)
[12]
张建良, 黄冬华, 张曦东, 等. 新型高炉喷煤模拟燃烧实验装置设计[J]. 北京科技大学学报, 2009, 31(5):633.(ZHANG Jian-liang, HUANG Dong-hua, ZHANG Xi-dong, et al. Design of an experimental device to simulate coal injection in blast furnaces[J]. Journal of University of Science and Technology Beijing, 2009, 31(5):633.)
[13]
CHAI Yi-fan, ZHANG Jian-liang, SHAO Qiu-jun,et al. Experiment research on pulverized coal combustion in the tuyere of oxygen blast furnace[J]. High Temperature Materials and Processes, 2016, 35(1):73.
[14]
李杰,宋灿阳,李小静,等. 高炉喷吹煤粉燃烧性与反应性的研究与应用[J]. 中国冶金,2019,29(1):8. (LI Jie, SONG Can-yang, LI Xiao-jing,et al. Research and application of combustibility and reactivity of pulverized coal injected in blast furnace[J]. China Metallurgy, 2019,29(1):8.)
[15]
高鹏, 赵丹宁, 王平, 等. 马钢4 000 m3高炉喷吹煤粉燃烧性能研究与应用[J]. 钢铁, 2018, 53(12):10. (GAO Peng, ZHAO Dan-ning, WANG Ping,et al. Study and application on combustibility of pulverized coal injection at 4 000 m3 BF of Masteel[J]. Iron and Steel, 2018, 53(12):10.)
[16]
邢相栋, 王莎, 张秋利, 等. 高炉喷吹废塑料与兰炭混合燃烧及动力学[J].钢铁研究学报, 2019, 31(3):258. (XING Xiang-dong, WANG Sha, ZHANG Qiu-li,et al. Mixed combustion and kinetics of waste plastics injected into blast furnace and anthracite[J]. Journal of Iron and Steel Research, 2019, 31(3):258.)