CaO-SiO2-Al2O3-MgO-FeO渣对Al2O3的溶解

doi:10.13228/j.boyuan.issn0449-749x.20230339

摘要
图/表
参考文献(0)
相关文章 (15)

全文: PDF (0 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为了控制低碳铝镇静钢中Al₂O₃夹杂物,并提升渣系对Al₂O₃夹杂物吸附能力,采用FactSage 8.1模拟计算CaO-SiO₂-Al₂O₃-5%MgO-5%FeO渣系的等黏度图和等ΔC/η(ΔC=C^s_Al₂O₃-C^b_Al₂O₃,η为渣的黏度)值线图。根据模拟计算图选取合适的五元精炼渣做Al₂O₃的吸附试验,试验研究了Al₂O₃在CaO-SiO₂-Al₂O₃-5%MgO-5%FeO渣系中的溶解速率,讨论了Al₂O₃棒浸入深度、直径、转速、渣成分以及温度对Al₂O₃溶解速率的影响,求解了Al₂O₃在溶解过程中的活化能。最后,采用场发射扫描电子显微镜(Apreo S HiVac)对氧化铝棒与熔渣接触的界面处进行微区线元素的定性分析。研究结果表明,Al₂O₃在渣中的溶解速率受诸多因素的影响;溶解速率随氧化铝棒的旋转速度、棒直径、浸入深度和温度的增加而增加;溶解速率也会随着CaO含量的增加而增加,Al₂O₃和SiO₂含量的增加而降低。溶解速率高度依赖于熔渣的黏度,渣的黏度对Al₂O₃的溶解速率呈负相关,Al₂O₃的溶解速率与浓度驱动力呈正相关。氧化铝棒溶解于渣系前,会先生成中间相CaO·2Al₂O₃和CaO·6Al₂O₃,中间相溶解在熔渣中,溶解于渣A中的表观活化能为410.9 kJ/mol。结合溶解速率图与等ΔC/η值线图进行对比,验证了Al₂O₃在渣中的溶解速率受渣物性的影响。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	齐詹
	成日金
	武献民
	霍立桥
	朱俊涛
	刘成松
	张华
	倪红卫

关键词 ：低碳铝镇静钢, 含FeO精炼渣, Al₂O₃夹杂物, 等黏度线, 溶解速率

Abstract：In order to control the Al₂O₃ inclusions in low-carbon Al-killed steel and improve the adsorption capacity of the slag system to Al₂O₃ inclusions, the isoviscosity diagram of CaO-SiO₂-Al₂O₃-5%MgO-5%FeO slag system and the contour map of ΔC/η (ΔC=C^s_Al₂O₃-C^b_Al₂O₃, η is the viscosity of slag) were simulated by FactSage 8.1. The dissolution rate of Al₂O₃ in CaO-SiO₂-Al₂O₃-5%MgO-5%FeO slag system was studied. The effects of Al₂O₃ rod immersion depth, diameter, rotation speed, slag composition and temperature on the dissolution rate of Al₂O₃ were discussed. The activation energy of Al₂O₃ in the dissolution process was solved. Finally, the qualitative analysis of the micro-line elements at the interface between the alumina rod and the slag was carried out by field emission scanning electron microscopy (Apreo S HiVac). The results show that the dissolution rate of Al₂O₃ in slag is affected by many factors. The dissolution rate increases with the increase of rotation speed, rod diameter, immersion depth and temperature of alumina rod. The dissolution rate also increases with the increase of CaO content, and decreases with the increase of Al₂O₃ and SiO₂ content. The dissolution rate is highly dependent on the viscosity of the slag. The viscosity of the slag is negatively correlated with the dissolution rate of Al₂O₃, and the dissolution rate of Al₂O₃ is positively correlated with the concentration driving force. Before the alumina rod is dissolved in the slag system, it will be transformed into intermediate phases CaO·2Al₂O₃ and CaO·6Al₂O₃, and the intermediate phase is dissolved in the slag. The apparent activation energy of dissolution in slag A is 410.9 kJ/mol. The dissolution rate of Al₂O₃ in slag was verified by comparing the dissolution rate diagram with the contour diagram of ΔC/η.

Key words： low carbon aluminium killed steel refining slag containing FeO Al₂O₃ inclusion iso-viscosity line dissolution rate

收稿日期: 2023-06-20

引用本文:

齐詹, 成日金, 武献民, 霍立桥, 朱俊涛, 刘成松, 张华, 倪红卫. CaO-SiO₂-Al₂O₃-MgO-FeO渣对Al₂O₃的溶解[J]. 钢铁, 2024, 59(2): 65-74. QI Zhan, CHENG Rijin, WU Xianmin, HUO Liqiao, ZHU Juntao, LIU Chengsong, ZHANG Hua, NI Hongwei. Al₂O₃dissolution into molten CaO-SiO₂-Al₂O₃-MgO-FeO slags[J]. Iron and Steel, 2024, 59(2): 65-74.

链接本文:

http://www.chinamet.cn/Jweb_gt/CN/10.13228/j.boyuan.issn0449-749x.20230339 或 http://www.chinamet.cn/Jweb_gt/CN/Y2024/V59/I2/65

[1] 杨光,杨文,张立峰.铝镇静钢中夹杂物钙处理改性及其影响因素[J].钢铁,2022,57(12):66.(YANG G, YANG W, ZHANG L F. Calcium treatment modification and influencing factors of inclusions in aluminum-killed steel[J]. Iron and Steel, 2022, 57(12): 66.)
[2] 杨文,薛勇强,曹晶,等.低碳铝镇静钢头坯洁净度研究[J].钢铁,2011,46(9):34.(YANG W, XUE Y Q, CAO J, et al. Investigation on head slab cleanliness of low carbon aluminum killed steel[J]. Iron and Steel, 2011, 46(9): 34.)
[3] ZHANG L F. State of the art in the control of inclusions in tire cord steels-a review[J]. Steel Research International, 2006, 77(3): 158.
[4] YANG W, WANG X H, ZHANG L F, et al. Characteristics of alumina-based inclusions in low carbon al-killed steel under no-stirring condition[J]. Steel Research International, 2013, 84(9): 878.
[5] 朱坦华,周秋月,任英,等.二次氧化过程IF钢中间包中夹杂物演变行为[J].钢铁,2020,55(3):35.(ZHU T H, ZHOU Q Y, REN Y, et al. Inclusion evolution in IF steel during tundish reoxidation[J]. Iron and Steel, 2020, 55(3): 35.)
[6] 王章印,姜敏,王新华.Q345D钢精炼过程夹杂物生成及演变行为[J].钢铁,2022,57(2):63.(WANG Z Y, JIANG M, WANG X H. Formation and evolution of inclusions Q345D steel during secondary refining process[J]. Iron and Steel, 2022, 57(2): 63.)
[7] 邓凯,孟庆格,郑红星.铝镇静钢连续退火相变行为与抗应变时效性能[J].中国冶金,2022,32(08):82.(DENG K, MENG Q G, ZHENG H X. Phase transformation behavior and strain aging resistance of Al-killed steel during continuous annealing[J]. China Metallurgy, 2022, 32(8): 82.)
[8] 任强,姜东滨,张立峰,等.Q235钢中夹杂物演变规律和生成机理分析[J].钢铁,2020,55(7):47.(REN Q, JIANG D B, ZHANG L F, et al, Evolution and formation mechanism of inclusions in a Q235 steel[J]. Iron and Steel, 2020, 55(7): 47.)
[9] YANG G W, WANG X H. Inclusion evolution after calcium addition in low carbon Al-killed steel with ultra low sulfur content[J]. Transactions of the Iron and Steel Institute of Japan, 2015, 55(1): 126.
[10] ZHANG L F, THOMAS B G. State of the art in evaluation and control of steel cleanliness[J]. ISIJ International, 2003, 43(3): 271.
[11] 于艳忠.低碳铝镇静钢生产工艺技术研究[D].沈阳:东北大学,2008.(YU Y Z. Study on Production Technology of Aluminium Killed Low Carbon Steel[D]. Shenyang:Noetheastern University, 2008.)
[12] 张立峰,李菲,方文.钢液钙处理过程中钙加入量精准计算的热力学研究[J].炼钢,2016,32(2):1.(ZHANG L F, LI F, FANG W. Thermodynamic investigation for the accurate calcium addition during calcium treatment of molten steels[J]. Steelmaking, 2016, 32(2): 1.)
[13] 郄亚娜,王岩,李丽丽,等.钢中非金属夹杂物控制技术发展现状及展望[J].特种铸造及有色合金,2020,40(4):373.(QIE Y N, WANG Y, LI L L. Present state and prospect of inclusion control in steel[J]. Special Casting and Nonferrous Alloys, 2020, 40(4): 373.)
[14] 幸伟,倪红卫,张华,等.钢中夹杂物去除技术的进展[J].特殊钢,2009,30(2):34.(XING W, NI H W, ZHANG H, et al. Progress on technique for removal of inclusions in steel[J]. Special Steel, 2009, 30(2): 34.)
[15] 张立峰.关于钢洁净度指数的讨论[J].炼钢,2019,35(3):1.(ZHANG L F, Discussion on the index of steel cleanliness[J]. Steelmaking, 2019, 35(3): 1.)
[16] 赵博,吴伟,杨峰,等.含氧化镧精炼渣的热力学分析及性能优化[J].中国冶金,2023,33(7):31.(ZHAO B, WU W, YANG F,et al. Thermodynamic analysis and performance optimization of refining slag containing lanthanum oxide[J]. China Metallurgy, 2023, 33(7): 31.)
[17] 闫学强,郑万,王国伟,等.微孔MgO耐火材料对钢液洁净度的影响[J].钢铁研究学报,2020,32(6):483.(YAN X Q, ZHENG W, WANG G W, et al. Effect of microporous MgO refractories on steel cleanliness[J]. Journal of Iron and Steel Research, 2020, 32(6): 483.)
[18] 朱苗勇,邓志银.钢精炼过程非金属夹杂物演变与控制[J].金属学报,2022,58(1):28.(ZHU M Y, DENG Z Y. Evolution and control of non-metallic inclusions in steel during secondary refining process[J]. Acta Metallurgica Sinica, 2022, 58(1): 28.)
[19] ZHANG S W, REZAIE H R. Alumina dissolution into silicate slag[J]. Journal of the American Ceramic Society, 2000, 83(4): 897.
[20] 王谦,何生平.低碳含铝钢LF炉精炼工艺及精炼渣的优化[J].北京科技大学学报,2007,29(s1):14.(WANG Q, HE S P. Optimization of LF refining process and slag for low carbon aluminum containing steel[J]. Journal of University of Science and Technology Beijing, 2007, 29(s1): 14.)
[21] 王传运.CaO-SiO₂-MgO-CaF₂熔渣对氧化锆的侵蚀行为[J].耐火与石灰,2010,35(2):53.(WANG C Y. Erosion behavior of CaO-SiO₂-MgO-CaF₂ slag on zirconia[J]. Refractories and Lime, 2010, 35(2): 53.)
[22] 于会香,谢辉,丁航,等.精炼渣对双相钢化学成分和非金属夹杂物的影响[J].中国冶金,2023,33(9):26.(YU H X, XIE H, DING H, et al. Effect of refining slag on chemical composition and non-metallic inclusions of dual phase steel[J]. China Metallurgy, 2023, 33(9): 26.)
[23] 张立峰,任英.精炼渣的夹杂物容量的概念及其应用[J].钢铁,2023,58(2):47.(ZHANG L F, REN Y. Concept of inclusion capacity of slag and its application[J]. Iron and Steel, 2023, 58(2): 47.)
[24] FEICHTINGER S, MICHELIC S K, KANG Y, et al. Insitu observation of the dissolution of SiO₂ particles in CaO-Al₂O₃-SiO₂ slags and mathematical analysis of its dissolution pattern[J]. Journal of the American Ceramic Society, 2014, 97(1): 316.
[25] CHOI J Y, LEE H G, KIM J S. Dissolution rate of Al₂O₃ into molten CaO-SiO₂-Al₂O₃ slags[J]. ISIJ International, 2002, 42(8): 852.
[26] BUI A H, HYUN-MO H A, CHUNG I S, et al. Dissolution kinetics of alumina into mold fluxes for continuous steel casting[J]. ISIJ International, 2005, 45(12): 1856.
[27] 苏丽娟,李光强,李伟,等.VOD精炼渣对Al₂O₃的溶解[J].过程工程学报,2013,13(2):230.(SU L J, LI G Q, LI W, et al. Dissolution of A1₂O₃ in VOD refining slag[J]. The Chinese Journal of Process Engineering, 2013, 13(2): 230.)
[28] REN C Y, ZHANG L F, Zhang J, et al. In Situ Observation of the dissolution of Al₂O₃ particles in CaO-Al₂O₃-SiO₂ Slags[J]. Metallurgical and Materials Transactions B, 2021, 52(7): 3288.
[29] VALDEZ M, SHANNON G S, SRIDHAR S. The ability of slags to absorb solid oxide inclusions[J]. Transactions of the Iron and Steel Institute of Japan, 2006, 46(3): 450.
[30] LI J L, SHU Q F, LIU Y A, et al. Dissolution rate of Al₂O₃ into molten CaO-Al₂O₃-CaF₂ flux[J].Ironmaking and Steelmaking, 2014, 41(10): 732.
[31] ZHANG S W, REZAIE H R, SARPOOLAKY H, et al. Alumina dissolution into silicate slag[J]. Journal of the American Ceramic Society, 2010, 83(4): 897.
[32] PARK Y J, CHO Y M, CHA W Y, et al. Dissolution kinetics of alumina in molten CaO-Al₂O₃-Fe_tO-MgO-SiO₂ oxide representing the RH slag in steelmaking process[J]. Journal of the American Ceramic Society, 2020, 103(3): 2210.
[33] HENDERSON J, YANG L, DERGE G. Self-diffusion of aluminum in CaO-SiO₂-Al₂O₃ melts. Transactions of the Metallurgical Society of AIME, 1961, 221(1): 56.
[34] ZHANG S W. Alumina dissolution into silicate slag[J]. Journal of the American Ceramic Society, 2010, 83(4): 89.