含煤球团直接还原热失重及动力学分析

doi:10.16085/j.issn.1000-6613.2015.03.017

化工进展 ›› 2015, Vol. 34 ›› Issue (3): 701-704.DOI: 10.16085/j.issn.1000-6613.2015.03.017

含煤球团直接还原热失重及动力学分析

满毅¹, 冯俊小^1,2, 葛琦¹, 李富杰¹

1. 北京科技大学机械工程学院, 北京 100083;
2. 北京市高校节能与环保工程研究中心, 北京 100083

收稿日期:2014-08-28 修回日期:2014-10-24 出版日期:2015-03-05 发布日期:2015-03-05
通讯作者: 冯俊小,教授,博士生导师。E-mail:bestmanyi@sina.com。
作者简介:满毅(1983-),男,博士研究生。
基金资助:
中央高校基本科研业务费专项资金项目(FRF-SD-12007B)

Thermogravimetric and kinetics analysis of direct reduction of carbon-containing pellets

MAN Yi¹, FENG Junxiao^1,2, GE Qi¹, LI Fujie¹

1. University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Engineering Research Center for Energy Saving and Environmental Protection, Beijing 100083, China

Received:2014-08-28 Revised:2014-10-24 Online:2015-03-05 Published:2015-03-05

摘要/Abstract

摘要： 随着电炉炼钢的快速发展, 作为其原料的直接还原铁的需求量日益增大, 对直接还原特性和机理的研究变得越来越迫切, 过去的研究主要集中在工艺条件和节能减排方面, 对反应控速模型的比较相对较少。本文在950~1100℃的N₂气氛下, 研究了还原温度对含煤球团还原速率的影响, 并结合XRD技术对还原产物的物相转换进行了分析。同时基于热重实验, 应用不同控速模型方程计算了直接还原过程反应动力学参数, 并与实验结果进行了对比。结果表明, 温度对还原过程起着至关重要的作用, Fe₃O₄还原生成FeO在950℃以下已经开始了, FeO的还原主要发生在1000℃以上, 从950~1100℃还原速率迅速增加。通过模型对比, 认为还原过程由三维气相扩散控制。

关键词: 含煤球团, 直接还原, 扩散, 气化, 动力学模型

Abstract: With the development of electric furnace steelmaking, the demand for the raw material, direct reduced iron is growing. The study of direct reduction characteristics and mechanism becomes more urgent. Past researches have mainly concentrated in process conditions, energy conservation and emissions reduction, but comparison of reaction speed control models is relatively few. In this paper, the effect of reduction temperature on carbon-containing pellets was investigated under nitrogen atmosphere from 950℃ to 1100℃. X-ray diffraction was used to identify the changes of iron phase. The reaction kinetics parameters were estimated based on thermogravimetric experiments and different speed control model equations. The estimated results were compared with the experimental results. Temperature played a vital role in the reduction process. Reduction of Fe₃O₄ to form FeO began below 950℃, and reduction of FeO to form Fe mainly began at 1000℃. Reduction rate increased rapidly between 950℃ and 1100℃. Through the comparison of different speed control models, it was concluded that the reduction process was controlled by three-dimensional gas diffusion.

Key words: carbon-containing pellets, direct reduction, diffusion, gasification, kinetic model

中图分类号:

TF559

满毅, 冯俊小, 葛琦, 李富杰. 含煤球团直接还原热失重及动力学分析[J]. 化工进展, 2015, 34(3): 701-704.

MAN Yi, FENG Junxiao, GE Qi, LI Fujie. Thermogravimetric and kinetics analysis of direct reduction of carbon-containing pellets[J]. Chemical Industry and Engineering Progree, 2015, 34(3): 701-704.

参考文献

[1] Okonkwo P C, Cai I J, Sam C, et al.Shift from coke to coal using direct reduction method and challenges[J].Journal of Iron and Steel Research International, 2009, 16(2):1-5.

[2] Zhu D Q, Mendes V, Chun T J, et al.Direct reduction behaviors of composite binder magnetite pellets in coal-based grate-rotary Kiln process[J].ISIJ International, 2011, 51(2):214-219.

[3] Li Y L, Sun T C, Zou A H, et al.Effect of coal levels during direct reduction roasting of high phosphorus oolitic hematite ore in a tunnel kiln[J].International Journal of Mining Science and Technology, 2012, 22(3):323-328.

[4] Kawanari M, Matsumoto A, Ashida R, et al.Enhancement of reduction rate of iron ore by utilizing iron ore/carbon composite consisting of fine iron ore particles and highly thermoplastic carbon material[J].ISIJ International, 2011, 51(8):1227-1233.

[5] Kirschen M, Badr K, Pfeifer H.Influence of direct reduced iron on the energy balance of the electric arc furnace in steel industry[J].Energy, 2011, 36(10):6146-6155.

[6] Kumar V, Khanam S.Recovery and utilization of waste heat in a coal based sponge iron process[J].Chemical Engineering and Processing:Process Intensification, 2012, 56:19-28.

[7] Mao Rui, Zhang Jianliang, Huang Donghua, et al.Preparation process of carbon-containing pellets with laterite nickel ore[J].Journal of University of Science and Technology Beijing, 2013, 35(7):862-868.

[8] Xu Chengyan, Sun Tichang, Qi Chaoying, et al.Effects of reductants on iron reduction in the direction process of high-phosphorus oolitic hematite[J].Journal of University of Science and Technology Beijing, 2011, 33(8):905-910.

[9] Rao Y K.The kinetics of reduction of hematite by carbon[J].Metallurgical and Materials Transactions, 1971, 2(5):1439-1447.

[10] Tang Huiqing, Guo Xingmin, Zhang Shengbi, et al.Mathematical model for direction of carbon-containing pellet and its application[J].Journal of Iron and Steel Research, 2000, 12(6):1-6.

[11] Shi J Y, Donskoi E, Mcelwain D L S.Modelling the reduction of an iron ore-coal composite pellet with conduction and convection in an axisymmetric temperature field[J].Mathematical and Computer Modelling, 2005, 42(1-2):45-60.

[12] Pineau A, Kanari N, Gaballah I.Kinetics of reduction of iron oxides by H₂ Part Ⅰ:Low temperature reduction of hematite[J].Thermochimica Acta, 2006, 447(1):89-100.

[13] Golap M, Gour G.Application of genetic algorithm (GA) to estimate the rate parameters for solid state reduction of iron ore in presence of graphite[J].Computational Materials Science, 2009, 45(1):176-180.

[14] Fan Lijuan, Lv Qinggang, Na Yongjie.Thermogravimetric analysis for direct reduction of iron ore powder by coal[J].CIESC Journal, 2010, 61(12):3228-3234.

[15] Sah R, Dutta S K.Kinetic studies of iron ore-coal composite pellet reduction by TG-DTA[J].Transactions of the Indian Institute of Metals, 2011, 64(6):583-591.

[16] Weiss B, Sturn J, Voglsam S, et al.Industrial fluidized bed direct reduction kinetics of hematite ore fines in H₂ rich gases at elevated pressure[J].Chemical Engineering Science, 2011, 66(4):703-708.

[17] Ding Y G, Wang J S, She X F, et al.Reduction characteristics and kinetics of bayanobo complex iron ore carbon bearing pellets[J].Journal of Iron and Steel Research, International, 2012, 20(5):28-33.

[18] Ma Xingya, Jiang Maofa, Wang Qi, et al.Kinetics and model of reaction process of iron ore-coal pellet[J].Journal of Northeastern University, 2002, 23(5):440-443.

[19] El-Hussiny N A, Shalabi M E H.A self-reduced intermediate product from iron and steel plants waste materials using a briquetting process[J].Powder Technology, 2011, 205(1-3):217-223.

[20] Piotrowski K, Mondal K, Lorethova H, et al.Effect of gas composition on the kinetics of iron oxide reduction in a hydrogen production process[J].International Journal of Hydrogen Energy, 2005, 30(15):1543-1554.

[21] 杨学民, 黄典冰, 孔令坛, 等.煤种对含煤球团还原速度的影响[J].钢铁研究学报, 1997, 9(2):1-6.

含煤球团直接还原热失重及动力学分析

Thermogravimetric and kinetics analysis of direct reduction of carbon-containing pellets

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	顾永正, 张永生. HBr改性飞灰对Hg⁰的动态吸附及动力学模型[J]. 化工进展, 2023, 42(S1): 498-509.
[2]	杨玉地, 李文韬, 钱永康, 惠军红. 工业燃烧室天然气湍流扩散火焰长度影响因素分析[J]. 化工进展, 2023, 42(S1): 267-275.
[3]	朱杰, 金晶, 丁正浩, 杨会盼, 侯封校. 化学链气化中准东煤灰对CaSO₄载氧体改性及其作用机理[J]. 化工进展, 2023, 42(9): 4628-4635.
[4]	张丽宏, 金要茹, 程芳琴. 煤气化渣资源化利用[J]. 化工进展, 2023, 42(8): 4447-4457.
[5]	张振, 李丹, 陈辰, 吴菁岚, 应汉杰, 乔浩. 吸附树脂对唾液酸的分离纯化[J]. 化工进展, 2023, 42(8): 4153-4158.
[6]	赵毅, 杨臻, 张新为, 王刚, 杨旋. 不同裂缝损伤和愈合温度条件下沥青自愈合行为的分子模拟[J]. 化工进展, 2023, 42(6): 3147-3156.
[7]	陆诗建, 张媛媛, 吴文华, 杨菲, 刘玲, 康国俊, 李清方, 陈宏福, 王宁, 王风, 张娟娟. 百万吨级CO₂捕集项目亚硝胺污染物扩散健康风险评估[J]. 化工进展, 2023, 42(6): 3209-3216.
[8]	卢兴福, 戴波, 杨世亮. 转鼓内圆柱形颗粒混合的超二次曲面离散单元法模拟[J]. 化工进展, 2023, 42(5): 2252-2261.
[9]	范昀培, 金晶, 刘敦禹, 王静杰, 刘秋祺, 许开龙. CaSO₄载氧体在煤气化化学链燃烧中的脱汞[J]. 化工进展, 2023, 42(3): 1638-1648.
[10]	刘玉龙, 胡南, 陈祥标, 陈森才, 曾冰勇, 丁德馨. 强碱性阴离子树脂对铀的循环吸附-淋洗性能及动力学分析[J]. 化工进展, 2023, 42(10): 5574-5583.
[11]	付佳, 谌伦建, 徐冰, 华绍烽, 李从强, 杨明坤, 邢宝林, 仪桂云. 模拟煤炭气化废水中苯酚的微生物降解[J]. 化工进展, 2023, 42(1): 526-537.
[12]	付春龙, 王松江, 李国智. 煤气化细渣燃烧技术研究进展[J]. 化工进展, 2022, 41(S1): 516-523.
[13]	祁元, 徐欣蓉, 阮玮, 吴昊, 吴科, 周亚明, 杨宏旻. 改性活性碳纤维对苯胺吸附特性分析[J]. 化工进展, 2022, 41(S1): 622-630.
[14]	张乾, 高增林, 王栋, 彭泽宇, 郝泽光, 黄伟. 煤岩显微组分分离富集物热化学反应特性[J]. 化工进展, 2022, 41(S1): 160-167.
[15]	房科靖, 熊祖鸿, 鲁敏, 黎涛, 陈勇. 垃圾衍生燃料的制备、热转化特性及应用研究进展[J]. 化工进展, 2022, 41(S1): 132-140.