高硫精矿配比对烧结矿性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20210407

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Abstract Concentrate is widely used in iron ore sintering process because its higher grade than that of imported ore-rich powder. However, there are few studies about the effect of high-sulfur concentrate on properties of sinter. Therefore, in order to study the effects of high-sulfur concentrate on the properties of sinter and influence of S element in concentrate on sintering process, a series of sinter cup experiments with high-sulfur concentrate concentration of 25%-45% were carried out, and the influences were characterized through microstructure, sintering indices, and metallurgical properties. The experimental results showed that when the concentration of concentrates was 25%, the interface reaction conditions of reduction were poor, and the diffusion of reduction gas were hindered by silicate phase. This resulted in a lower reduction index with 77.80%, the initial softening temperature was 1 200 ℃, and the permeability of cohesive zone deteriorated. The concentrates with 30% increased the sintering utilization index to 1.19 t/(m²·h), and improved vertical sintering speed to 22.22 mm/min. The sinter with high-sulfur concentrate concentration of 40% had improved reduction property and deteriorated the low temperature reduction degradation property. When the concentration was 45%, the sintering utilization index was the highest with 1.20 t/(m²·h), the reduction performance and reduction degradation property were suitable. On the whole, an appropriate increase in high-sulfur concentrate content was beneficial to improve the reduction performance and softening-melting performance of the sinter, but when the concentrate ratio was 45%, the S-value was 281.02 kPa·℃, meaning poor permeability performance of sinter. In the terms of sintering flue gas, when concentration of concentrates was 40%, the CO₂ and NO_x content of sintering flue gas were high, showing a high oxidizing atmosphere in the sintering process, which decreased the content of low-reducibility minerals such as iron olivine in the sinter and deteriorated the reduction degradation index. The results of flue gas analysis showed that the S element of high-sulfur concentrate basically entered sintering flue gas during sintering process, and the performance of sinter was not deteriorated.

Key words： high-sulfur concentrate sinter index microstructure metallurgical properties sintering flue gas

Received: 19 July 2021

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	WANG Gui-lin
	ZHANG Jian-liang
	LIU Zheng-jian
	WANG Yao-zu
	LIU Fu-cheng
	TONG Zhen

Cite this article:

WANG Gui-lin,ZHANG Jian-liang,LIU Zheng-jian等. Effect of high-sulfur concentrate on properties of sinter[J]. Iron and Steel, 2022, 57(2): 19-27.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20210407 OR http://www.chinamet.cn/Jweb_gt/EN/Y2022/V57/I2/19

[1] 翟晓波,吴胜利,阙志刚,等. 加拿大铁精粉对烧结体固结强度的影响及其改善方法[J]. 钢铁,2019, 54(6): 27. (ZHAI Xiao-bo, WU Sheng-li, QUE Zhi-gang, et al. Effect of Canadian iron concentrate on bonding strength of sinter body and thereof improvement method[J]. Iron and Steel, 2019, 54(6): 27.)
[2] 朱德庆,王志远,徐小锋,等. 润磨强化镜铁精粉烧结特性的研究[J]. 钢铁, 2007, 4(1): 12. (ZHU De-qing, WANG Zhi-yuan, XU Xiao-feng, et al. Improvement of sintering behaviors of Brazilian specularite concentrate by damp milling[J]. Iron and Steel, 2007, 4(1): 12.)
[3] Clout J M F, Manuel J R. Fundamental investigations of differences in bonding mechanisms in iron ore sinter formed from magnetite concentrates and hematite ores[J]. Powder Technology, 2003, 130(1): 393.
[4] 王永红,孙立伟,于原浩,等. 不同SiO₂质量分数精粉对烧结指标的影响[J]. 中国冶金, 2019, 29(5): 10. (WANG Yong-hong, SUN Li-wei, YU Yuan-hao, et al. Influence of different SiO₂ mass fraction of fine powder on sinter index [J]. China Metallurgy, 2019, 29(5): 10.)
[5] Nkogatse T, Garbers-Craig A. Evaluation of iron ore concentrate and micropellets as potential feed for sinter production [J]. Mineral Processing and Extractive Metallurgy Review, 2021, https://www.tandfonline.com/doi/full/10.1080/08827508.2020.1857249.
[6] 王义芳,王五经,刘正平,等. 巴西精矿粉的烧结试验与生产[J]. 钢铁,2000, 4(12): 1. (WANG Yi-fang, WANG Wu-jing, LIU Zheng-ping, et al. Sintering experiment and production of Brazilian concentrate[J]. Iron and Steel, 2000, 4(12): 1.)
[7] 张建良,刘东辉,刘浩,等. 核矿石对低钛型钒钛磁铁精矿烧结制粒的影响[J]. 钢铁, 2017, 52(9): 16. (ZHANG Jian-liang, LIU Dong-hui, LIU Hao, et al. Effects of nuclei ores on granulation behavior of low-titanium magnetite concentrate [J]. Iron and Steel, 2017, 52(9): 16.)
[8] 刘东辉,张建良,王广伟,等. 生石灰吸水特性对钒钛磁铁精粉烧结制粒的影响[J]. 烧结球团, 2020, 45(1): 20. (LIU Dong-hui, ZHANG Jian-liang, WANG Guang-wei, et al. Effects of water absorbing characteristics of quicklime on granulation of the vanadium titano-magnetite concentrate fines[J]. Sintering and Pelletizing, 2020, 45(1): 20.)
[9] 李想. 钒钛磁铁矿烧结优化配矿研究[D]. 沈阳:东北大学, 2018. (LI Xiang. Investigation on Ore-Proportioning Optimization Technique with Vanadium and Titanium Magnetite Ores in Sintering[D]. Shenyang: Northeastern University,2019.)
[10] 何占伟,薛向欣. 典型钒钛磁铁矿的烧结基础特性[J]. 钢铁,2020, 55(5): 27. (HE Zhan-wei, XUE Xiang-xin, Basic sintering characteristics of several typical vanadium titanium magnetite[J]. Iron and Steel, 2020, 55(5): 27.)
[11] 胡熊. 高比例钒钛粉烧结技术研究及应用[J]. 重庆科技学院学报(自然科学版),2021, 23(2): 111. (HU Xiong. Reaearch and application of sintering technology of high proportion vanadium-titanium powder[J]. Journal of Chongqing University of Science and Technology (Natural Sciences), 2021, 23(2): 111.)
[12] 马黎明,张建良,吴胜利,等. 基于熔剂性生球的复合造块工艺处理钒钛磁铁矿[J]. 钢铁研究学报, 2020, 32(6): 462. (MA Li-ming, ZHANG Jian-liang, WU Sheng-li, et al. Treatment of vanadium-titanium magnetite based on fluxed green ball composite agglomeration process[J]. Journal of Iron and Steel Research, 2020, 32(6): 462.)
[13] 魏刚. 强化钒钛磁铁精矿烧结试验研究[J]. 烧结球团, 2020, 45(2): 5. (WEI Gang. Experimental research on strengthening sintering of V-bearing titaniferous magnetite concentrate[J]. Sintering and Pelletizing, 2020, 45(2): 5.)
[14] 贺淑珍,冯焕林. 高比例精矿粉对烧结的影响分析及强化措施探讨[J]. 中国冶金, 2014, 24(7): 27. (HE Shu-zhen, FENG Huan-lin. Anylysis of the effects of high proportion iron concentrate on sinter quality and discussion of strengthening measures[J]. China Metallurgy, 2014, 24(7): 27.)
[15] Wang Zhe, Pinson D, Chew S, et al. Behavior of New Zealand ironsand during iron ore sintering[J]. Metallurgical and Materials Transactions B, 2016, 47(1): 330.
[16] Dehghan-manshadi A, Manuel J, Hapugoda S, et al. Sintering characteristics of titanium containing iron ores[J]. ISIJ International, 2014, 54(10): 2189.
[17] WANG Yao-zu, ZHANG Jian-liang, LIU Zheng-jian, et al. Co-utilization of converter sludge-containing dedust wastewater in iron ore sintering to save fresh water, enhance quality and reduce pollution[J]. Journal of Cleaner Production, 2019, 234: 157.
[18] 包头钢铁稀土公司,长沙黑色冶金矿山设计研究院.GB/T 13241—1991 铁矿石还原性的测定方法[S].北京:中国标准出版社,1991. (Baotou Iron and Steel Rare Earth Co., Changsha Ferrous Metal Mine Design and Research Insitute.GB/T 13241—1991 Iron Ores-Determination of Reducibility[S]. Beijing:Standards Press of China,1991.)
[19] 宝山钢铁股份有限公司.GB/T 24204—2009 高炉炉料用铁矿石低温还原粉化率的测定动态试验法[S]. 北京:中国标准出版社,2009. (Baoshan Iron and Steel Co., Ltd. GB/T 24204—2009 Iron Ores for Blast Furnace Feedstocks-Determination of Low-Temperature Reduction Disintegration Indices by Dynamic Method[S]. Beijing:Standards Press of China,2009.)
[20] 赵勇,吴铿,潘文,等. 分段法研究烧结矿还原的动力学过程[J]. 东北大学学报(自然科学版),2013, 34(9): 1282. (ZHAO Yong, WU Keng, PAN Wen, et al. Investigation of the reduction kinetics process of sinter ore by sectional stepwise method[J]. Journal of Northeastern University (Natural Science), 2013, 34(9): 1282.)
[21] 赵霞,潘文,李铁军. 铁矿石还原气-固还原行为研究现状[J]. 中国冶金, 2013, 23(4): 1. (ZHAO Xia, PAN Wei, LI Tie-jun. Overview of research of gas-solid reduction of iron ore[J]. China Metallurgy, 2013, 23(4): 1.)
[22] YANG S, ZHOU M, XUE X, et al. Isothermal reduction kinetics of chromium-bearing vanadium-titanium sinter reduced with CO gas at 1 173 K[J]. JOM, 2019, 71(8): 2812.
[23] 王希珍,李宪文,周国凡,等. 高碱度烧结矿高温还原过程动力学研究[J]. 炼铁, 1986, 4(5): 1. (WANG Xi-zhen, LI Xian-wen, ZHOU Guo-fan, et al. Study on the kinetics of high-alkalinity sinter in high-temperature reduction process [J]. Ironmaking, 1986, 4(5): 1.)
[24] 郑安阳,刘征建,苍大强,等. MgO对含钛烧结矿矿相结构及软熔滴落性能的影响[J]. 工程科学学报,2018, 40(2): 184. (ZHENG An-yang, LIU Zheng-jian, CANG Da-qiang, et al. Effects of MgO on the mineral structure and softening-melting property of Ti-containing sinter[J]. Chinese Journal of Engineering, 2018, 40(2): 184.)
[25] WANG Gui-lin, KANG Jian, ZHANG Jian-liang, et al. Softening-melting behavior of mixed burden based on low-magnesium sinter and fluxed pellets[J]. International Journal of Minerals, Metallurgy and Materials, 2021, 28(4): 621.
[26] 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排放模型[J]. 钢铁,2020, 55(2): 23. (CHEN Xu-ling, ZHENG Ru-yue, FAN Xiao-hui, et al. Numerical simulation model of temperature and NO_x emission in flue gas circulating sintering process[J].Iron and Steel, 2020, 55(2): 23.)
[27] 胡长庆,李炳军,韩涛. 铁矿粉烧结过程CO与NO协同控制技术研究现状[J]. 河北冶金,2021, 4(4): 1. (HU Chang-qing, LI Bing-jun, HAN Tao. Rearch status of CO and NO cooperative control technology during iron ore sintering process[J]. Hebei Metallurgy, 2021, 4(4): 1.)