|
|
Metallurgical properties of furnace charge under different conditions of pellet ore and block ore addition |
LI Sheng1, HE Zhi-jun1, LI Yun-fei1, QIU Shuang1, ZHAN Wen-long1, BAI Bing-yang2 |
1. Institute of Metallurgical Energy Optimization and New Technology, Liaoning University of Science and Technology, Anshan 114051, Liaoning, China; 2. Ironmaking Plant, Dalian Special Steel Co., Ltd., Dalian 116105, Liaoning, China |
|
|
Abstract For the iron ore variety, quality, volatility of domestic steel enterprises resulting in a decline in blast furnace burden structure stability problem, through laboratory test, the system is studied on the metallurgical properties of iron ore, the high temperature properties of the comprehensive burden structure of the sinter and different kinds of natural lump ore, the sinter and pellet collocation and different kinds of natural ore and pellets. The results show that the reduction performance and the droplet property of sinter are better than that of acid pellets and imported block ore, but the low-temperature reduction degradation phenomenon is very serious, low temperature reduction degradation index RDI>3.15 mm is only 70%. Ha leather lump ore dripping temperature is too low, only about 1 353 ℃. The South Africa ore pressure difference is too large (6 820 Pa), which is not conducive to the stable and anterograde blast furnace. Due to the excellent metallurgical properties of Rio ball and samaco ball, the proportion of them can be appropriately increased in the production of the blast furnace to make up the shortage of sintering capacity and reduce the pollution to the environment. Under the condition of low sintering ratio (55%), using different pellet collocations, the burden of softening and melting interval is narrowed, the Δpm is lowered and the comprehensive performance is obviously improved. The best composite charge structure is 55% sinter +20% Rio pellet +5% Samaco pellet +20% Hopi block ore. With the addition of the new mixed ore burden structure, the soft melting range is narrowed, the Δpmand the S are lowered and the soft melt dripping performance is better.
|
Received: 01 April 2019
|
|
|
|
[1] 张寿荣, 姜曦. 中国大型高炉生产现状分析及展望[J]. 钢铁, 2017, 52(2):2.(ZHANG Shou-rong, JIANG Xi. Production and development of large blast furnaces in China[J]. Iron and Steel, 2017, 52(2):2.) [2] 王海涛, 李光辉, 范晓慧, 等. 几种高炉炉料冶金性能的对比研究[J]. 钢铁, 2006, 41(1):23.(WANG Hai-tao, LI Guang-hui, FAN Xiao-hui, et al. Comparative study on metallurgical properties of blast furnace burdens[J]. Iron and Steel, 2006,41(1):23.) [3] 孙敏敏, 宁晓钧, 张建良, 等. 炼铁系统节能减排技术的现状和发展[J]. 中国冶金, 2018, 28(3):2.(SUN Min-min, NING Xiao-jun, ZHANG Jian-liang, et al. Research status and progress of energy saving and emission reduction technology for ironmaking[J]. China Metallurgy, 2018, 28(3):2.) [4] WANG H T, CHU M S, ZHAO W, et al. Effect of iron coke hot briquette on softening-melting and dripping properties of blast furnace mixed burden[J]. Journal of Northeastern University, 2016, 37(8):1108. [5] SHI P Y, ZHOU P, FU D, et al. Mathematical model for burden distribution in blast furnace[J]. Ironmaking and Steelmaking, 2016, 43(1):74. [6] 田仕友, 林志强. 球团竖炉配加赤铁矿试验及对比分析[J]. 中国冶金, 2018, 28(9):42.(TIAN Shi-you, LIN Zhi-qiang. Test and comparison analysis on addition of hematite in pellet shaft furnace[J]. China Metallurgy, 2018,28(9):42.) [7] WU S L, SU B, LIU X L, et al. Optimisation of the blast furnace burden based on its primary slag formation behaviour[J]. Ironmaking and Steelmaking, 2016, 45(1):1. [8] 邸航, 何志军, 阎丽娟, 等. 基于大型铁矿石熔滴检测设备的综合炉料性能[J]. 钢铁, 2018, 53(10):92.(DI Hang, HE Zhi-jun, YAN Li-juan, et al. Metallurgical property of mixed burden based on a large scale iron ore droplet testing equipment[J]. Iron and Steel, 2018, 53(10):92.) [9] 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 Jie, ZHANG Hong-yu, ZHOU Ming-shun, et al. Rational burden structure of blast furnace based on softening and melting property[J]. Iron and Steel, 2016, 51(9):11.) [10] 周明顺, 唐复平, 赵东明, 等. 酸球配加镁质熔剂及新型皂土试验[J]. 钢铁, 2018, 53(4):15.(ZHOU Ming-shun, TANG Fu-ping, ZHAO Dong-ming, et al. Investigation on MgO-flux and a new bentonite in pellets production[J]. Iron and Steel, 2018, 53(4):15.) [11] Pal J, Ghorai S, Agarwal S, et al. Effect of blaine fineness on the quality of Hematite iron ore pellets for blast furnace[J]. Mineral Processing and Extractive Metallurgy Review, 2015, 36(2):83. [12] Pandey B D, Yadav U S. Blast furnace performance as influenced by burden distribution[J]. Ironmaking and Steelmaking, 1999, 26(3):187. [13] 牛乐乐, 刘征建, 张建良, 等. 鼓风条件及块矿比例对炉料软熔性能的影响[J]. 中国冶金, 2019, 29(7):9.(NIU Le-le, LIU Zheng-jian, ZHANG Jian-liang, et al. Effect of blast conditions and lump ore ratio on softening-melting properties of iron-bearing charge[J]. China Metallurgy, 2019, 29(7):9.) [14] ZHANG H J, SHE X F, HAN Y H, et al. Softening and melting behavior of ferrous burden under simulated oxygen blast furnace condition[J]. Journal of Iron and Steel Research, International, 2015, 22(4):297. [15] Lawrence K, Nehring M. Market structure differences impacting australian iron ore and metallurgical coal industries[J]. Minerals, 2015, 5(3):473. [16] 吴胜利, 汪国俊, 姜伟忠, 等. 高炉内天然块矿与烧结矿高温交互反应研究[J]. 钢铁, 2007, 42(3):10.(WU Sheng-li, WANG Guo-jun, JIANG Wei-zhong, et al. Interaction between lump ore and sinter in BF[J]. Iron and Steel, 2007, 42(3):10.) [17] 李新宇, 张建良, 苏步新, 等. 基于主成分分析的高炉用天然块矿性能评价[J]. 中南大学学报:自然科学版, 2016, 47(9):2943.(LI Xin-yu, ZHANG Jian-liang, SU Bu-xin, et al. Performance evaluation of lump ores for blast furnace based on principal component analysis[J]. Journal of Central South University:Natural Science, 2016, 47(9):2943.) [18] 吴胜利, 王来信, 王玉珏, 等. 含铁炉料间高温交互作用对初渣生成行为的影响[J]. 工程科学学报, 2016, 38(11):41.(WU Sheng-li, WANG Lai-xin, WANG Yu-jue, et al. Effect of high temperature interaction between iron-containing charge materials on initial slag formation behavior[J]. Chinese Journal of Engineering, 2016, 38(11):41.) [19] LI T, SUN C, LIU X, et al. The effects of MgO and Al2O3 behaviours on softening-melting properties of high basicity sinter[J]. Ironmaking and Steelmaking, 2017, 45(2):1. [20] 张开发, 吴胜利, 刘新亮, 等. 不同单种炉料熔滴特征及初渣形成变化[J]. 科学技术与工程, 2015,15(13):36.(ZHANG Kai-fa, WU Sheng-li, LIU Xin-liang, et al. The characteristics of softening melting and the formation of the primary slag of different ferrous burden materials[J]. Science Technology and Engineering, 2015, 15(13):36.) [21] 李廷乐, 孙长余, 汪琦. w(MgO)和w(Al2O3)对混合炉料软熔性能的影响[J]. 钢铁, 2019, 54(4):14.(LI Ting-le, SUN Chang-yu, WANG Qi. Effects of w(MgO) and w(Al2O3) on softening-melting properties of mixed burden[J]. Iron and Steel, 2019, 54(4):14.) |
[1] |
LI Shen-zi, LONG Yue, PAN Xiang-yang, DU Pei-pei, XING Lei. Effect of w(MgO)/w(Al2O3) on droplet performance of composite burden[J]. Iron and Steel, 2020, 55(9): 16-22. |
[2] |
ZHANG Shu-hui, WANG Bao-yong, LAN Chen-chen, LIU Xiao-jie, LÜ Qing. Prospects and present status of pellets chemical composition control[J]. Iron and Steel, 2020, 55(8): 19-26. |
[3] |
BAO Ji-wei1,CHU Man-sheng2,LIU Zheng-gen1,HAN Dong1,CAO Lai-geng1,GUO Jun1. Effect of carbonization process parameters on metallurgical properties of iron coke[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(7): 532-541. |
[4] |
LIU Wen-qiang1,CHENG Yang1,LI Jie1,ZHU Jin-wei2,LI Fei3,LI Da-liang3. Effect of particle size of coke powder on CO emission in sintering flue gas[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(7): 633-638. |
[5] |
DU Liang, HAN Xiu-li, ZHANG Quan-sheng, ZHOU Xiang, YANG Hong-da, WANG Ying. Quantitative relation between mineralogical structure and metallurgical properties of sinter of import iron ore[J]. Iron and Steel, 2020, 55(6): 38-45. |
[6] |
KANG Jian,NING Xiao-jun,ZHANG Jian-liang,WANG Yao-zu,WANG Gui-lin,LIU Zheng-jian. Effect of liquid phase generation behavior of sintering mixture on sinter quality[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(10): 860-867. |
|
|
|
|