铁矿粉烧结燃烧行为与CO、NO排放特征

doi:10.13228/j.boyuan.issn0449-749x.20230007

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Abstract In order to reveal the combustion characteristics and flue gas emission law of iron ore sintering quasi-particles, different types of quasi-particles were prepared by using analytical reagent instead of sintering raw materials. The combustion law of quasi-particles under different process parameters (oxygen volume percent, heating rate and gas flow rate) was studied by thermogravimetric method, and the influence of quasi-particle structure and adhesive powder composition on CO and NO emission during combustion process was studied by flue gas analyzer. The results show that the influence of oxygen volume percent, heating rate and gas flow rate on the combustion process of different types of quasi-particles are consistent. That is to say, increasing oxygen volume percent and gas flow rate is conducive to enhancing the internal diffusion ability of O₂ molecules, promoting carbon-oxygen combustion reaction and improving combustion conditions. Due to the thermal hysteresis effect inside the quasi-particles, the combustion characteristic parameters increase with the increase of heating rate and the combustion reaction moves to high temperature zone. However, due to the different structures of quasi-particles, the influence degree of these process parameters on combustion reaction is also different. The structure of quasi-particles significantly affects heat transfer and mass transfer behavior during combustion process. The peak volume percent of CO and NO generated by S′ type quasi-particle combustion is highest. While S type, C type and P type are hindered by adhesion layer, CO and NO diffusion resistance increases outwardly which the residence time of CO and NO in product layer promots CO reduction NO reaction occurrence reducing CO and NO peak volume fraction. Fe₂O₃、CaO、MgO have significant catalytic effects on coke powder burning as well as CO-NO reduction reaction with CaO has strongest catalytic ability reducing CO、NO peak volume percent by 48.7%、50.0%.

Key words： sintering of iron ore powder quasi-particles combustion characteristics emission characteristics CO NO emission law

Received: 06 January 2023

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	Articles by authors
	HU Changqing
	LI Chaoran
	HAN Tao
	SHI Xuefeng

Cite this article:

HU Changqing,LI Chaoran,HAN Tao等. Combustion behavior and emission characteristics of CO and NO in iron ore sintering[J]. Iron and Steel, 2023, 58(7): 27-35.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20230007 OR http://www.chinamet.cn/Jweb_gt/EN/Y2023/V58/I7/27

[1] 张建良,尉继勇,刘征建,等. 中国钢铁工业空气污染物排放现状及趋势[J]. 钢铁,2021,56(12):1.(ZHANG J L,WEI J Y,LIU Z J,et al. Present situation and trend of air pollutant emission in China iron and steel industry[J]. Iron and Steel,2021,56(12):1.)
[2] World Steel Association. World Steel in Figures 2022[M]. Brussels: World Steel Association, 2022.
[3] 王新东,郝良元. 现代炼铁工艺及低碳发展方向分析[J]. 中国冶金,2021,31(5):1.(WANG X Y,HAO L Y. Analysis of modern ironmaking process and low-carbon development direction[J]. China Metallurgy,2021,31(5):1.)
[4] 钱家澍. 当代世界钢铁工业发展和 “中国方案” 建议[J]. 钢铁,2021,56(2):1.(QIAN J S. Development of contemporary world iron and steel industry and suggestion of "China plan"[J]. Iron and Steel,2021,56(2):1.)
[5] 胡浪,何传超,罗国民. 国内烧结节能技术发展趋势研究[J]. 冶金能源,2021,40(1):13.(HU L,HE C C,LUO G M. Research on the development trend of domestic sintering energy-saving technology[J]. Energy for Metallurgical Industry,2021,40(1):13.)
[6] XIONG L,PENG Z W,GU F Q,et al. Combustion behavior of granulated coke breeze in iron ore sintering[J]. Powder Technology,2018,340(9):131.
[7] 阙志刚,王金生,艾仙斌,等. 基于固体燃料粒度优化的烧结过程NO_x减排[J]. 中国冶金,2019,29(8):8.(QUE Z G,WANG J S,AI X B,et al. NO_x emission reduction in sintering process based on particle size optimization of solid fuel[J]. China Metallurgy,2019,29(8):8.)
[8] HIDA Y,SASAKI M,ENOKIDO T,et al. Effect of the existing state of coke breeze in quasi-particles of raw mix on coke combustion in the sintering process[J]. Tetsu-to-Hagané,1982,68(3):400.
[9] 胡长庆,卢超群,韩涛. 煤基固体燃料燃烧特性分析[J]. 中国冶金,2022,32(2):27.(HU C Q,LU C Q,HAN T. Analysis of combustion characteristics of coal-based solid fuel[J]. China Metallurgy,2022,32(2):27.)
[10] 周明顺,赵东明,李建军,等. 焦粉粒度分布对铁矿石烧结指标的影响[J]. 中国冶金,2018,28(2):11.(ZHOU M S,ZHAO D M,LI J J,et al. Influence of coke powder particle size distribution on iron ore sintering index[J]. China Metallurgy,2018,28(2):11.)
[11] 袁亚强,何志军,韩啸,等. 准颗粒中烧结用燃料燃烧特性[J]. 钢铁研究学报,2020,32(5):386.(YUAN Y Q,HE Z J,HAN X,et al. Combustion characteristics of quasi-granular sintering fuel[J]. Journal of Iron and Steel Research,2020,32(5):386.)
[12] 马鹏楠,程明,周明熙,等. 铁矿石烧结过程中不同类型准颗粒的燃烧特性[J]. 工程科学学报,2019,41(3):316.(MA P N,CHENG M,ZHOU M X,et al. Combustion characteristics of different types of quasi-particles in iron ore sintering process[J]. Journal of Engineering Science,2019,41(3):316.)
[13] 史先菊,王强,李光强,等. 熔剂颗粒在烧结过程中的特征演变及影响[J]. 钢铁,2021,56(12):28.(SHI X J,WANG Q,LI G Q,et al. Characteristic evolution and influence of flux particles in sintering process[J]. Iron and Steel,2021,56(12):28.)
[14] OGI H,MAEDA T,OHNO K,et al. Effect of coke breeze distribution on coke combustion rate of the quasi-particle[J]. ISIJ International,2015,55(12):2550.
[15] 张俊,郭兴敏,黄学军. 铁矿石烧结中碱性熔剂对燃料燃烧的影响[J]. 钢铁研究学报,2012,24(8):7.(ZHANG J,GUO X M,HUANG X J. Effect of alkaline flux on fuel combustion in iron ore sintering[J]. Journal of Iron and Steel Research,2012,24(8):7.)
[16] 唐兵,杨莉荣,刘珊,等. 煤热分析最佳测量参数的探究[J]. 水泥,2020(增刊1):63.(TANG B,YANG L R,LIU S,et al. Discussion on the best measurement parameters of coal thermal analysis[J]. Cement,2020(s1):63.)
[17] 赵欣锋,齐西伟,程扬,等. 铁矿烧结过程烟气排放规律分析[J]. 钢铁研究学报,2022,34(8):758.(ZHAO X F,QI X W,CHENG Y,et al. Analysis of flue gas emission law in iron ore sintering process[J]. Journal of Iron and Steel Research,2022,34(8):758.)
[18] NI W,LI H,ZHANG Y,et al. Effects of fuel type and operation parameters on combustion and NO_x emission of the iron ore sintering process[J]. Energies,2019,12(2):213.
[19] 阙志刚,吴胜利,王金生,等. 无烟煤代替焦粉燃烧行为及对烧结NO_x排放的影响[J]. 钢铁,2019,54(10):23.(QUE Z G,WU S L,WANG J S,et al. Combustion behavior of anthracite instead of coke powder and its influence on sintering NO_x emission[J]. Iron and Steel,2019,54(10):23.)
[20] 程扬,李杰,杨爱民,等. 添加剂降低烧结烟气中CO含量的试验行为[J]. 中国冶金,2020,30(12):99. (CHENG Y,LI J,YANG A M,et al. Experimental behavior of additives to reduce CO content in sintering flue gas[J]. China Metallurgy,2020,30(12):99.)
[21] 陈许玲,郑如月,范晓慧,等. 烟气循环烧结过程料层温度及NO_x排放模拟模型[J]. 钢铁,2020,55(2):23.(CHEN X L,ZHENG R Y,FAN X H,et al. Simulation model of bed temperature and NO_x emission in flue gas circulating sintering process[J]. Iron and Steel,2020,55(2):23.)
[22] TOMAS DA ROCHA L,KIM H,LEE C,et al. Mechanism of NO_x formation from nitrogen in the combustion of the coals used in sintering process[J]. Metallurgical and Materials Transactions B,2020,51:2068.
[23] 彭政富,张建良,毕传光,等. 焦粉与兰炭对高炉混煤燃烧特性的影响[J]. 钢铁,2019,54(12):10.(PENG Z F,ZHANG J L,BI C G,et al. Influence of coke powder and charcoal on combustion characteristics of blast furnace blended coal[J]. Iron and Steel,2019,54(12):10.)
[24] 孙洋,窦明辉,王家骏,等. 焦炭与烧结矿在耦合反应过程中的溶损特性[J]. 中国冶金,2021,31(12):15.(SUN Y,DOU M H,WANG J J,et al. Dissolution loss characteristics of coke and sinter during coupling reaction[J]. China Metallurgy,2021,31(12):15.)
[25] 寇明银,张众,曾旺,等. 铁矿粉烧结优化配矿及其模型研究进展[J]. 钢铁,2022,57(2):1.(KOU M Y,ZHANG Z,ZENG W,et al. Research progress on optimal ore blending and its model of iron ore powder sintering[J]. Iron and Steel,2022,57(2):1.)
[26] 张俊,郭兴敏,张金福,等. 烧结原料对燃料燃烧的影响研究[J]. 钢铁,2010,45 (11):12.(ZHANG J,GUO X M,ZHANG J F,et al. Study on the influence of sintering raw materials on fuel combustion[J]. Iron and Steel,2010,45 (11):12.)
[27] SHEN G,WANG Z,WU J,et al. Combustion characteristics of low-rank coal chars in O₂/CO₂, O₂/N₂ and O₂/Ar by TGA[J]. Journal of Fuel Chemistry and Technology, 2016,44(9):1066.
[28] LIU J,YUAN Y,ZHANG J,et al. Combustion kinetics characteristics of solid fuel in the sintering process[J]. Processes,2020,8(4):475.