矿焦耦合冶金性能试验及评价方法

doi:10.13228/j.boyuan.issn0449-749x.20230324

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (0 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The reaction and characteristics of iron ore and coke in various areas of the blast furnace (BF) are important factors affecting the efficiency and yield of BF ironmaking, so that accurate evaluation of the quality of ore and coke has been arousing interests from ironmakers. The testing methods and indexes for evaluating the metallurgical properties of ore or coke have rapidly developed, and some methods have been standardized, including the method for determination of iron ore softening-melting performance under load and the determination of coke reactivity index and coke strength after reaction, etc. The methods have been widely adopted by iron and steel enterprises. However, it is still difficult to calculate the technical-economic indexes of BF from on the experimental results based on current testing methods and indexes. This may be due to insufficient simulation on the interaction between ore and coke through the entire process of reduction, solution loss, softening and melting in BF. Assigning values to the correlated behaviours and characteristics of ore and coke and constructing an indicator system to evaluate the interaction between them could not be achieved. Therefore, a test device and evaluation methodology (Qisunny method) have been invented, which deploy samples with coke-ores-coke layer structure in the crucible integrating the reduction under the load-thermogravimetric-gas analysis to simulate coupling ores and coke behaviours and properties, such as iron ore reduction, coke solution loss, burden softening, melting and dropping. The device and methodology can conduct coke and ore coupling behaviours and properties test and evaluate its coupling performance. The test results of changing burden structure and coke type showed that coupling coke and ore metallurgical performance evolved with different zones with distinct boundary in an order from indirect reduction zone to indirect and direction reduction co-existing and softening zone, to smelting direct reduction zone and to dripping direct reduction zone. The performance evaluation parameters included the temperature and the temperature interval of different zones, the indirect and direct reduction rate, the total reduction rate, the permeability parameters in melting zone, the solution loss rate and strength after dissolution of the top layer coke. The solution loss reaction of coke mainly taken place in the melting zone. The solution loss rate of the upper layer coke was close to the traditional coke reactivity index while its strength after dissolution was higher than the traditional coke strength index after reaction. The method can provide a totally new option for evaluating coupling coke-ore performances and optimising burden structure.

Key words： blast furnace iron ore coke coupling metallurgical properties evaluation method

Received: 15 June 2023

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Qi
	SONG Yangsheng
	LI Tingle
	LI Zhexi
	TIM Evans

Cite this article:

WANG Qi,SONG Yangsheng,LI Tingle等. A test and evaluation method of ore and coke coupling metallurgical properties[J]. Iron and Steel, 2024, 59(2): 44-54.

URL:

http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20230324 OR http://www.chinamet.cn/Jweb_gt/EN/Y2024/V59/I2/44

[1] 吴胜利, 王筱留, 张建良. 钢铁冶金学(炼铁部分)[M]. 4版. 北京: 冶金工业出版社, 2019. (WU S L, WANG X L, ZHANG J L. Ferrous Metallurgy (Iron making)[M]. 4th ed. Beijing: Metallurgical Industry Press, 2019.)
[2] GEERDES M, CHAIGNEAU R, LINGIARDI O, et al. Modern Blast Furnace Ironmaking: An Introduction[M]. 4th ed. Amsterdam: IOS Press, 2020.
[3] 张军,严铁军,席玮城.焦炭质量提升对高炉冶炼的影响分析[J].冶金能源,2022,41(4):15.(ZHANG J ,YAN T J,XI W C.Influence analysis of coke quality improvement on blast furnace smelting[J]. Energy for Metallurgical Industry, 2022,41(4):15.)
[4] 铁维博,黄浚宸,蒋永强,等.高炉焦炭不同层面的研究进展[J].冶金能源,2023,42(6):20. (TIE W B,HUANG J C,JIANG Y Q,et al.Progress in research of the different levels of the blast furnace coke[J]. Energy for Metallurgical Industry,2023,42(6):20. )
[5] 中国国家标准化管理委员会. GB/T 13241—2017铁矿石还原性的测定方法[S]. 北京: 中国标准出版社, 2017. (Standardization Administration of the People's Republic of China. GB/T 13241—2017 Iron Ores-determination of Reducibility[S]. Beijing: Standards Press of China, 2017.)
[6] International Organization for Standardization. ISO 4695: 2007-Iron Ores for Blast Furnace Feedstocks: Determination of the Reducibility by the Rate of Reduction Index (3th ed)[S]. Switzerland: ISO Press, 2007.)
[7] International Organization for Standardization. BS ISO 7992: 2022-Iron Ores for Blast Furnace Feedstocks: Determination of Reduction under Load (4th ed)[S]. Switzerland: ISO Press, 2022.)
[8] 中国国家标准化管理委员会. GB/T 24530—2009高炉用铁矿石荷重还原性的测定[S]. 北京: 中国标准出版社, 2009. (Standardization Administration of the People's Republic of China. GB/T 24530—2009 Iron Ores for Blast Furnace Feedstocks-Determination of Reduction under Load[S]. Beijing: Standards Press of China, 2009.)
[9] 中国国家标准化管理委员会. GB/T 34211—2017铁矿石高温荷重还原软熔滴落性能测定方法[S]. 北京: 中国标准出版社, 2017. (Standardization Administration of the People's Republic of China. GB/T 34211—2017 Iron Ores-Method for Determination of Iron Reduction Softening Drippinger Performance under Load[S]. Beijing: Standards Press of China, 2017.)
[10] 中国国家标准化管理委员会. GB/T 4000—2017焦炭反应性及反应后强度试验方法[S]. 北京: 中国标准出版社, 2017. (Standardization Administration of the People's Republic of China. GB/T 4000—2017 Determination of Coke Reactivity index (CRI) and Coke Strength after Reaction (CSR)[S]. Beijing: Standards Press of China, 2017.)
[11] ILJANA M, KEMPPAINEN A, PAANANEN T, et al. Evaluating the reduction-softening behaviour of blast furnace burden with an advanced test[J]. ISIJ International, 2016, 56(10): 1705.
[12] 刘杰, 张洪宇, 周明顺, 等. 基于软熔滴落性能的高炉合理炉料结构[J]. 钢铁, 2016, 51(9): 11. (LIU J, ZHANG H Y, ZHOU M S, et al. Rational burden structure of blast furnace based on softening and melting property[J]. Iron and Steel, 2016, 51(9): 11.)
[13] 郄亚娜, 靳亚涛, 康媛, 等. 高炉富氢对钒钛矿软熔滴落性能的影响[J]. 钢铁, 2023, 58(5): 31. (QIE Y N, JIN Y T, KANG Y, et al. Influence of hydrogen-rich on softening and melting property of blast furnace burden with vanadium and titanium[J]. Iron and Steel, 2023, 58(5): 31.)
[14] 吴胜利, 庹必阳, 张丽华, 等. 预还原含铁炉料在高炉内的软熔滴落行为[J]. 钢铁, 2013, 48(5): 11. (WU S L, TUO B Y, ZHANG L H, et al. Softening melting dropping behavior of pre-reduction iron-bearing burden in blast furnace[J]. Iron and Steel, 2013, 48(5): 11.)
[15] YANG W J, ZHOU Z Y, PINSON D, et al. A new approach for studying softening and melting behavior of particles in a blast furnace cohesive zone[J]. Metallurgical and Materials Transactions B, 2015, 46(2): 977.
[16] NANDY B, CHANDRA S, BHATTACHARJEE D, et al. Assessment of blast furnace behaviour through softening-melting test[J]. Ironmaking and Steelmaking, 2006, 33(2): 111.
[17] KEMPPAINEN A, OHNO K, ILJANA M, et al. Softening behaviors of acid and olivine fluxed iron ore pellets in the cohesive zone of a blast furnace[J]. ISIJ International, 2015, 55(10): 2039.
[18] WU S L, TUO B Y, ZHANG L H, et al. New evaluation methods discussion of softening-melting and dropping characteristic of BF iron bearing burden[J]. Steel Research International, 2014, 85(2): 233.
[19] VAN DER VELDEN B, TROUW J, CHAIGNEAU R, et al. Coke reactivity under simulated blast furnace conditions[C]//Ironmaking Conference Proceedings. Warrendale:[s.n.], 1999: 275.
[20] AN J Y, SEO J B, CHOI J H, et al. Evaluation of characteristics of coke degradation after reaction in different conditions[J]. ISIJ International, 2016, 56(2): 226.
[21] KUMAR D, SAXENA V K, TIWARI H P, et al. Variability in metallurgical coke reactivity index (CRI) and coke strength after reaction (CSR): An experimental study[J]. ACS omega, 2022, 7(2): 1703.
[22] LUNDGREN M, SUNDQVIST ÖKVIST L, BJÖRKMAN B. Coke reactivity under blast furnace conditions and in the CSR/CRI test[J]. Steel Research International, 2009, 80(6): 396.
[23] 古光燧. 模拟高炉炉身的实验设备-Boris炉[J]. 钢铁, 1986, 21(1): 42. (GU G S. A simulating blast furnace shaft-Boris furnace[J]. Iron and Steel, 1986, 21(1): 42.)
[24] KEMPPAINEN A, ILJANA M, HEIKKINEN E P, et al. Reduction behavior of cold-bonded briquettes under simulated blast furnace conditions[J]. ISIJ International, 2014, 54(7): 1539.
[25] 尹建威, 王凤岐, 党玉华, 等. 氧气高炉炉身的模拟试验研究[J]. 钢铁研究学报, 2002, 14(2): 1. (YIN J W, WANG F Q, DANG Y H, et al. Experimental simulation on reduction process of shaft for oxygen blast furnace[J]. Journal of Iron and Steel Research, 2002, 14(2): 1.)
[26] 黄浚宸, 汪琦, 张松. 气体非等摩尔扩散对焦炭溶损反应的影响[J]. 钢铁, 2022, 57(3): 16. (HUANG J C, WANG Q, ZHANG S. Influence of gas non equimolar diffusion on coke solution-loss reaction[J]. Iron and Steel, 2022, 57(3): 16.)
[27] GENG Y H, GUO R, LI Y Z, et al. Characteristics of coke pore formation and its effect on solution loss degradation[J]. Metallurgical Research and Technology, 2020, 117, 112.
[28] TUO B Y, WANG J L, YAO Y L, et al. Influence of coke reactivity improved on high temperature properties of iron-bearing burden[J]. ISIJ International, 2015, 55(9): 1859.
[29] 沈峰满, 姜鑫, 魏国, 等. 富氢还原对烧结矿还原性及还原粉化的影响[J]. 中国冶金, 2014, 24(1): 2. (SHEN F M, JIANG X, WEI G, et al. Effect of hydrogen-enriched gas on reducibility and reduction-disintegration of sinters[J]. China Metallurgy, 2014, 24(1): 2.)
[30] CHIU Y F. Study of coke petrography and factors affecting coke reactivity[J]. Ironmaking and Steelmaking, 1982, 5(5): 196.
[31] SUNAHARA K, NATSUI T, SHIZAWA K, et al. Effect of coke reactivity on sinter softening-melting property by simultaneous evaluation method of carbonaceous and ferrous burdens in blast furnace[J]. ISIJ International, 2011, 51(8): 1322.
[32] 兰臣臣, 邵建, 张淑会, 等. 不同反应性焦炭在炉料还原-软熔过程中的作用行为[J]. 钢铁, 2023, 58(6): 18. (LAN C C, SHAO J, ZHANG S H, et al. Functional behavior of coke with different reactivity in reduction-softening-melting process of burden[J]. Iron and Steel, 2023, 58(6): 18.)
[33] NOMURA S, AYUKAWA H, KITAGUCHI H, et al. Improvement in blast furnace reaction efficiency through the use of highly reactive calcium rich coke[J]. ISIJ International, 2005, 45(3): 316.
[34] ICHIKAWA K, KASHIHARA Y, OYAMA N, et al. Evaluating effect of coke layer thickness on permeability by pressure drop estimation model[J]. ISIJ International, 2017, 57(2): 254.
[35] 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. Solution loss characteristics of cokes in coke-sinter coupling reaction[J]. China Metallurgy, 2021, 31(12): 15.)