萤石含量对连铸保护渣结晶性能的影响

特殊钢 ›› 2015, Vol. 36 ›› Issue (3): 49-53.

萤石含量对连铸保护渣结晶性能的影响

韩秀丽^1,2，潘苗苗¹，刘磊¹，张韩¹，刘丽娜¹

1河北联合大学矿业工程学院，唐山063009；
2河北省矿业开发与安全技术实验室，唐山063009

收稿日期:2014-12-26 出版日期:2015-06-01 发布日期:2022-08-18
作者简介:韩秀丽(1965-)，女，硕士(北京科技大学)，教授,硕士生导师,1987年河北地质学院(本科)毕业，应用矿物学研究。
基金资助:
国家自然科学基金项目资助(51174073 ；U1360106)

Effect of Fluorite Content on Crystallization Properties of Casting Mould Fluxes

Han Xiuli^1,2, Pan Miaomiao¹ , Liu Lei¹, Zhang Han¹ ， Liu Lina¹

1 College of Mining Engineering, Hebei United University, Tangshan 063009 ；
2 Hebei Province Key Lab for Mining Development and Safety Technology, Tangshan 063009

Received:2014-12-26 Published:2015-06-01 Online:2022-08-18

摘要/Abstract

摘要： 通过热丝法得出保护渣连续冷却转变（CCT）和时间-温度转变（TTT）曲线,并用偏光显微分析和X-射线衍射分析方法研究了萤石含量（8%~16%）对碱度1.0的薄板坯连铸结晶器保护渣结晶性能的影响。结果表明,萤石含量每增加2%,保护渣的临界冷却速度平均增加2.5℃;同一冷却速度下,随保护渣中萤石含量的增加,结晶温度升高,结晶率增大,有利于提高界面热阻,控制渣膜传热,减少铸坯表面裂纹产生;因萤石含量超过14%时,渣膜中大量生成结晶矿物枪晶石,对连铸润滑要求较高的钢种,应控制萤石含量≤14%。

关键词: 保护渣, 萤石含量, 连续冷却转变, 时间-温度转变, 结晶率

Abstract: With using hot wire method to get the mould fluxes continuous cooling transformation (CCT) and time-temperature transformation (TTT) curves and using polarizing microscope combined with X-ray diffraction analysis, the effect of fluorite content (8% ~ 16% ) on crystallization properties of thin slab casting mould fluxes with basicity 1. 0 has been studied. Results show that with increasing fluorite content by each 2% , the average critical cooling rate increases by 2. 5 ℃. ； at same cooling rate with increasing fluorite content in mould fluxes, the mould fluxes crystallization temperature raises and the crystallization rate increases, they are favourable to improve the interfacial thermal resistance, control the heat transfer of slag film and decrease the forming of surface crack of casting slab; as the fluorite content is more than 14% , large amount of crystalline mineral cuspidine forms in slag film, for the steel grades with higher casting lubricating requirement ,it should be to control the fluorite content in fluxes no less than 14%.

韩秀丽, 潘苗苗, 刘磊, 张韩, 刘丽娜. 萤石含量对连铸保护渣结晶性能的影响[J]. 特殊钢, 2015, 36(3): 49-53.

Han Xiuli, Pan Miaomiao , Liu Lei, Zhang Han, Liu Lina. Effect of Fluorite Content on Crystallization Properties of Casting Mould Fluxes[J]. Special Steel, 2015, 36(3): 49-53.

参考文献

[1]谢兵，齐飞，雷云，等.连铸保护渣的结晶过程[J].钢铁研究学报,2007,19(12) ：27-30.
[2]孙丽枫，宋智芳,刘承军，等.连铸结晶器保护渣结晶性能的研究 [J].特殊钢,2007,28(2) ：34-35.
[3]李殿明，邵明天,杨宪礼，等.连铸结晶器保护渣应用技术[M]. 北京：冶金工业出版社,2008：8.
[4]朱传运，李春龙,王云盛，等.中碳钢板坯连铸保护渣的结晶性能 [J].钢铁研究学报,2004,16(3):19-22.
[5]韩文殿，仇圣桃,张兴中，等.结晶器无氟保护渣渣膜的传热性和矿物结构[J].钢铁研究学报,2007,19(3):14-18.
[6]唐萍.连铸结晶器内渣膜结晶动力学及渣膜结构研究[D].重庆:重庆大学,2010.
[7]于雄,文光华，唐萍，等.连铸结晶器保护渣渣膜结晶特性的研究进展[J].材料导报,2010,24(3):101-103.
[8]田乃媛.薄板坯连铸连轧[M].北京:冶金工业出版社,2004.
[9]仲增墉.中国薄板坯连铸连轧技术的现状和发展[C].2002,薄板坯连铸连轧国际研讨会.中国广州,2002.
[10]曹立军.唐钢FTSC薄板坯连铸结晶器传热研究与保护渣性能优化[D].唐山：河北理工大学,2006.
[11]Grieveson P. Physical Properties of Casting Poeders: Part 2 Mineralogical Constitution of Slags Formed by Poeders [J] . Ironmaking and Steelmaking, 1988,15(4) :181-186.
[12] Orrling C. Observations of the Melting and Solidification Behavior of Mold Slag[J]. Iron and Steelmaker,2000,27(1) ：53-63.
[13] Emi M. The Mechanism for Sticking Type Break-Outsnad New Development in Continuous Casting Mold Fluxes [C]. In： ISS 74th Steeling Making Conference Proceeding ,1991 :623.
[14]朱传运，刘承军,史培阳，等.保护渣成分对结晶矿相影响[J]. 东北大学学报(自然科学版),2004,25(6) ：559-563.
[15]朱传运，刘承军,王德永，等.结晶器保护渣结晶温度的影响因素[J].东北大学学报(自然科学版),2004:25(10) ,988-992.
[16]肖茂元，王艺慈，张芳，等.碱度对无氟渣渣膜传热、结晶性能及结晶矿相的影响[J].铸造技术,2010,31(7):918-921.
[17]任允芙.钢铁冶金岩相矿相学[M].北京：冶金工业出版社， 1982:147-148.