CaO-SiO_2-MgO-Al_2O_3-BaO渣系脱硫能力研究
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摘要
为了探究温度、碱度(R)、MgO和BaO的质量分数对高炉渣脱硫能力影响,以酒钢现场高炉渣实际成分为基准,选取分析纯化学试剂配制实验渣样,采用双层石墨坩埚法研究了含钡渣系的脱硫能力,并考察BaO对脱硫动力学条件的影响。研究结果表明,增大高炉渣碱度,提高渣中MgO的质量分数均能使硫分配比增加,炉渣脱硫能力增强。渣中BaO的质量分数由0增加到4%,硫分配比先逐渐升高后略有降低,BaO的质量分数为3.5%左右时硫分配比达到最大值。BaO的质量分数增加使得熔渣中硫的传质系数增大,脱硫速率明显提升。
In order to explore the influence of temperature, basicity, MgO mass percent and BaO mass percent on desulphurization capacity of blast furnace slag, taking the actual composition of the field blast furnace slag in JISCO as a reference, the desulphurization capacity of slag systems containing barium prepared by the analytically pure reagents was studied using the double graphite crucible. The effect of BaO on kinetic conditions for desulphurization was also investigated. The results show that the sulphur partition ratio increases gradually with the increase of basicity and MgO mass percent in slag and the desulphurization capacity of slag is improved. When the mass percent of BaO in the slag increases from 0 to 4%, the sulphur partition ratio increases firstly and then decreases slightly, and the sulfur distribution ratio reaches the maximum value when BaO mass percent is about 3.5%. With increasing the BaO mass percent in slag, the desulfurization rate can be significantly accelerated, and the mass transfer coefficient of sulphur in slag can be raised.
In order to explore the influence of temperature, basicity, MgO mass percent and BaO mass percent on desulphurization capacity of blast furnace slag, taking the actual composition of the field blast furnace slag in JISCO as a reference, the desulphurization capacity of slag systems containing barium prepared by the analytically pure reagents was studied using the double graphite crucible. The effect of BaO on kinetic conditions for desulphurization was also investigated. The results show that the sulphur partition ratio increases gradually with the increase of basicity and MgO mass percent in slag and the desulphurization capacity of slag is improved. When the mass percent of BaO in the slag increases from 0 to 4%, the sulphur partition ratio increases firstly and then decreases slightly, and the sulfur distribution ratio reaches the maximum value when BaO mass percent is about 3.5%. With increasing the BaO mass percent in slag, the desulfurization rate can be significantly accelerated, and the mass transfer coefficient of sulphur in slag can be raised.
引文
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[17] 北京钢铁学院炼铁教研组.氧化钡对炉渣性能的影响[J].北京科技大学学报,1960(2):27.(Beijing Iron and Steel Institute Iron Teaching and Research Group.Effect of barium oxide on slag performance[J].Journal of University of Science and Technology Beijing,1960(2):27.)
[18] 鄢毓璋,兰洪.高炉低钛渣脱硫的动力学研究[J].金属学报,1991,27(4):224.(Yan Y Z,Lan H.Kinetics of desulphurizing reaction blast furnace low titania slag[J].Acta Metallurgica Sinica,1991,27(4):224.)
[19] 孙长余,陈亚春,李静,等.MgO对高铝高炉渣脱硫的影响及其动力学分析[J].重庆大学学报,2016,39(4):82.(Sun C Y,Chen Y C,Li J,et al.Influence and dynamics analysis of MgO content on thr desulfurization of blast furnace slag with high Al2O3 content[J].Journal of Chongqing University,2016,39(4):82.)
[2] 李京社,唐海燕,孙开明,等.硫容量模型和在五元渣CaO-SiO2-MgO-Al2O3-FetO中的应用[J].钢铁研究学报,2009,21(2):9.(Li J S,Tang H Y,Sun K M,et al.Sulfide capacity model and its application in CaO-SiO2-MgO-Al2O3-FetO slag system[J].Journal of Iron and Steel Research,2009,21(2):9.)
[3] Ma X D,Chen M,Xu H F,et al.Sulphide capacity of CaO-SiO2-Al2O3-MgO system relevant to low MgO blast furnace slags[J].ISIJ International,2016,56(12):1.
[4] 谢海深,李福民,马明鑫,等.含碱高炉渣硫容量的研究[J].钢铁,2007,42(3):14.(Xie H S,Li F M,Ma M X,et al.Study on sulphide capacity of BF slag containing alkali metals[J].Iron and Steel,2007,42(3):14.)
[5] 祝贞学,李桂荣,王宏明,等.BaO,B2O3对CaO基精炼渣熔化性能及脱硫能力的影响[J].北京科技大学学报,2006,28(8):725.(Zhu Z X,Li G R,Wang H M,et al.Effect of BaO,B2O3 on the melting properties and desuiphurization abiiity of an CaO-based refining slag[J].Journal of University of Science and Technology Beijing,2006,28(8):725.)
[6] Li S Q,Zhu R,Guo H J,et al.Experimental research on refining slag systems containing BaO for ultra-low sulphur steel[J].Journal of Iron and Steel Research International,2003,10(1):11.
[7] 袁骧,张建良,毛瑞,等.镁铝比对高炉渣脱硫能力的影响[J].东北大学学报:自然科学版,2015,36(11):1609.(Yu X,Zhang J L,Mao R,et al.Effect of w(MgO)/w(Al2O3)ratio on desulfurization capacity of BF slag[J].Journal of Northeastern University:Natural Science,2015,36(11):1609.)
[8] Shankar A,G?rnerup M,Seetharaman S,et al.Sulfide capacity of high alumina blast furnace slags[J].Metallurgical and Materials Transactions,2006,37B(6):941.
[9] 王平,刘响,孟庆民,等.高铝渣的流动性和脱硫能力[J].过程工程学报,2013,13(5):788.(Wang P,Liu X,Meng Q M,et al.Flow ability and desulfurization of high alumina blast furnace slag[J].The Chinese Journal of Process Engineering,2013,13(5):788.)
[10] Dong K,Wu L,Liu W J,et al.Desulfurization of CaO-Al2O3-SiO2-TiO2 slag system[J].ISIJ International,2014,54(10):2248.
[11] Tong Z F,Qiao J L,Jiang X Y.Hot metal desulfurization kinetics by CaO-Al2O3-SiO2-MgO-TiO2-Na2O slags[J].ISIJ International,2017,57(2):245.
[12] Zhang J,Lü X W,Yan Z M,et al.Desulphurisation ability of blast furnace slag containing high Al2O3 and 5 mass% TiO2 at 1 773 K[J].Ironmaking Steelmaking,2016,43(5):378.
[13] 张振峰,吕庆,高峰,等.高TiO2、Al2O3炉渣脱硫能力的试验研究[J].钢铁,2008,43(2):14.(Zhang Z F,Lü Q,Gao F,et al.Experimental research on desulphurization capacity of high TiO2 and Al2O3 BF slag[J].Iron and Steel,2008,43(2):14.)
[14] Condo A F T,Lindstr?m D,Sichen D.Study on the equilibrium of slag and hot metal at tapping with respect to sulfur[J].Steel Research International,2017,88(6):1.
[15] Condo A F T,Allertz C,Sichen D.Experimental determination of sulphide capacities of blast furnace slags with higher MgO contents[J].Ironmaking and Steelmaking,2017,https://doi.org/10.1080/03019233.2017.1366089.
[16] Ma X D,Chen M,Zhu J M.Properties of low-MgO ironmaking blast furnace slags[J].ISIJ International,2018,58(8):1402.
[17] 北京钢铁学院炼铁教研组.氧化钡对炉渣性能的影响[J].北京科技大学学报,1960(2):27.(Beijing Iron and Steel Institute Iron Teaching and Research Group.Effect of barium oxide on slag performance[J].Journal of University of Science and Technology Beijing,1960(2):27.)
[18] 鄢毓璋,兰洪.高炉低钛渣脱硫的动力学研究[J].金属学报,1991,27(4):224.(Yan Y Z,Lan H.Kinetics of desulphurizing reaction blast furnace low titania slag[J].Acta Metallurgica Sinica,1991,27(4):224.)
[19] 孙长余,陈亚春,李静,等.MgO对高铝高炉渣脱硫的影响及其动力学分析[J].重庆大学学报,2016,39(4):82.(Sun C Y,Chen Y C,Li J,et al.Influence and dynamics analysis of MgO content on thr desulfurization of blast furnace slag with high Al2O3 content[J].Journal of Chongqing University,2016,39(4):82.)
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