Abstract:In recent years, the prices of important metals such as vanadium, titanium, and chromium have skyrocketed. The efficient development and utilization of vanadium titanium magnetite resources can not only alleviate the shortage of iron ore resources, but also solve the contradiction between supply and demand of important metals. It is conducive to the sustainable development of China′s steel industry. The sintering basic characteristics of five typical vanadium titanium magnetite concentrates with large domestic usage were systematically studied by micro-sintering equipment. The phase composition of vanadium titanium magnetite concentrate was analyzed by XRD and SEM-EDS. The results show that the sintering basic characteristics of vanadium titanium magnetite are closely related to its chemical composition and phase composition. The main phase of low-titanium vanadium titanium magnetite is magnetite, and the comprehensive evaluation index of sintering basic characteristics is relatively better, of which CJ is the best. However, the main phase of high-titanium vanadium titanium magnetite is magnetite and ilmenite, their basic characteristics are very poor,which is mainly affected by titanium. On the whole, the vanadium titanium magnetite has a poor sintering basic characteristic and should be matched with iron concentrate with better basic characteristics as much as possible.
[1] 王喜庆. 钒钛磁铁矿高炉冶炼[M]. 北京:冶金工业出版社,199.(WANG Xi-qing. Vanadium Titanium Magnetite Blast Furnace Smelting[M]. Beijing:Metallurgical Industry Press,1994.) [2] 王帅,郭宇峰,姜涛,等. 钒钛磁铁矿综合利用现状及工业化发展方向[J]. 中国冶金, 2016, 26(10): 40. (WANG Shuai,GUO Yu-feng,JIANG Tao,et al. Comprehensive utilization and industrial development direction of vanadium-titanium magnetite[J]. China Metallurgy, 2016, 26(10): 40.) [3] Hsieh Liheng. Effect of raw material composition on the sintering properties[J]. ISIJ International,2005,45(4):551. [4] 洪陆阔,齐渊洪,孙彩娇,等. 钒钛磁铁矿煤基直接还原试验[J]. 钢铁, 2017, 52(11): 15. (HONG Lu-kuo,QI Yuan-hong,SUN Cai-jiao,et al. Direct reduction of coal based vanadium-bearing titanomagnetite[J]. Iron and Steel, 2017, 52(11): 15.) [5] 李乃尧,张建良,刘兴乐,等. MgO、TiO2对镁质钒钛球团矿综合冶金性能的影响[J]. 钢铁, 2017, 52(7): 14. (LI Nai-yao,ZHANG Jian-liang,LIU Xing-le,et al. Effects of MgO and TiO2 on comprehensive metallurgical properties of magnesia vanadium titanium pellets[J]. Iron and Steel, 2017, 52(7): 14.) [6] 宋鹤锴,吴胜利,周恒. 铁矿烧结黏结相气孔率影响因素分析[J]. 中国冶金, 2019, 29(5): 15.(SONG He-kai,WU Shen-li,ZHOU Heng. Analysis of influence factors of porosity of sintered bonding phase in iron ore[J]. China Metallurgy, 2019, 29(5): 15.) [7] 王耀祖,张建良,刘征建,等.w(TiO2)对烧结矿矿相结构及软熔滴落性能的影响[J]. 钢铁,2017,52(10):20.(WANG Yao-zu,ZHANG Jian-liang,LIU Zheng-jian,et al. Effects of w(TiO2) on mineral structure and softening-melting property of sinter[J]. Iron and Steel,2017,52(10):20.) [8] 吴胜利,刘宇,杜建新,等. 铁矿石的烧结基础性能之新概念[J]. 北京科技大学学报,2002,24(3):254.(WU Sheng-li,LIU Yu,DU Jian-xin,et al. New concept of iron ores sintering basic characteristics[J]. Journal of University of Science and Technology Beijing,2002,24(3):254.) [9] 孙正汉,黄晓丽,丁跃华,等. B2O3对含钛高炉渣中钙钛矿相及渣铁分离的影响[J]. 钢铁, 2018, 53(2): 73.(SUN Zheng-han, HUANG Xiao-li,DING Yue-hua,et al. Effect of B2O3 on separation of perovskite and slag in Ti-bearing blast furnace slag[J]. Iron and Steel, 2018, 53(2): 73.) [10] ZHOU M, JIANG T, YANG S T,et al. Vanadium-titanium magnetite ore blend optimization for sinter strength based on iron ore basic sintering characteristics[J]. International Journal of Mineral Processing,2015,142(9):125. [11] LIU D H,ZHANG J L,LIU Z J,et al. Effects of iron sand ratios on the basic characteristics of vanadium titanium mixed ores[J]. JOM,2016,68(9):2418. [12] 张国成,罗果萍,邬虎林,等. 配加蒙古精矿对球团矿性能的影响[J]. 中国冶金, 2019, 29(11): 24. (ZHANG Guo-cheng,LUO Guo-ping,WU Hu-lin, et al. Effects of adding Mongolian concentrate on pellets properties[J]. China Metallurgy, 2019, 29(11): 24.) [13] Wu S L,Oliveira D,Dai Y M,et al. Ore-blending optimization model for sintering process based on characteristics of iron ores[J]. International Journal of Minerals Metallurgy and Materials,2012,19(3):217. [14] Debrincat D,Loo C E,Hutchens M F. Effect of iron ore particle assimilation on sinter structure[J]. ISIJ International,2004,44(8):1308. [15] WU S L,ZHANG G,CHEN S,et al. Influencing factors and effects of assimilation characteristic of iron ores in sintering process[J]. ISIJ International,2014,54(3):582. [16] 罗国萍,孙国龙,赵艳霞,等. 包钢常用铁矿粉烧结基础特性[J]. 过程工程学报,2008,8(1):198.(LUO Guo-ping,SUN Guo-long,ZHAO Yan-xia,et al. Basic sintering characteristics of iron ore powders commonly used in Baotou Iron and Steel Co[J]. The Chinese Journal of Process Engineering,2008, 8(1):198.)