连铸中间包覆盖剂结壳原因分析及工艺控制

doi:10.13228/j.boyuan.issn1005-4006.20220103

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摘要中间包渣面结壳不仅恶化中间包冶金效果,还阻碍国内某钢厂智慧连铸工作的推进。为了解决中间包渣面结壳问题,分析钢水温度、中间包渣成分、熔点以及连浇炉数对渣面结壳的影响规律。结果表明,渣层厚度和保温剂的保温效果是中间包渣面结壳主要影响因素。浇注初期,上层覆盖剂保温效果差,中间包渣面熔化成液态。随着连浇炉数增加,渣层热阻增大,中间包渣面重新凝固发生结壳问题。因此,为了改善中间包渣面结壳问题,采用低比重碳化稻壳替代碳化稻球作为保温剂,改善上层覆盖剂的保温效果、阻止浇注初期渣面熔化。现场实施后,一连铸和二连铸中间包渣面结壳率分别从47.3%和35.3%下降到15.0%和10.7%。

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	周业连
	江中块
	张发斌

关键词 ：连铸中间包, 覆盖剂, 渣面结壳, 低比重碳化稻壳, 保温剂

Abstract：The slag crust not only deteriorates the effect of tundish metallurgy, but also hinders the development of smart continuous casting in the steel plant. In order to solve the solidified crusts of tundish fluxes, the effects of steel temperature, composition and melting point of tundish fluxes, and casting heats on the solidified crust at tundish stream zone were investigation in detail. The results show that fluxes thickness and thermal insulating property were the main factors for solidified crust at the tundish stream zone. For the poor fluxes thermal insulating property, the surface of tundish fluxes was melted during the ladle initial pouring stage. With the casting heats increasing, the thermal resistance of the tundish fluxes increasing, resulting in resolidating of the surface fluxes. In order to improving the insulating property of the upper tundish fluxes, the lower specific weight carbonized rice husks were chosen as heat preservation agent instead of carbonized rice ball, preventing the surface of tundish fluxes melt during the ladle initial pouring stage. After implementation, the solidified crust rate of the tundish fluxes in the No.1 continuous casting plant and No.2 continuous casting plant decreased from 47.3% and 35.3% to 15.0% and 10.7%, respectively.

Key words： continuous casting tundish tundish flux solidified crust lower specific weight carbonized rice husks heat preservation agent

收稿日期: 2022-06-08

引用本文:

周业连, 江中块, 张发斌. 连铸中间包覆盖剂结壳原因分析及工艺控制[J]. 连铸, 2023, 42(2): 113-119. ZHOU Ye-lian, JIANG Zhong-kuai, ZHANG Fa-bin. Control process and mechanism analysis for tundish fluxes to form the solidified crusts. CONTINUOUS CASTING, 2023, 42(2): 113-119.

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[1]	王巍, 张壮, 张力萍, 等. 节镍型奥氏体不锈钢轧板表面脱皮缺陷特征与成因[J]. 中国冶金, 2022, 32(6): 139.
[2]	王博, 邹平, 孙秀兵, 等. Q195热轧带钢大型夹杂物来源分析及控制[J]. 中国冶金, 2021, 31(8): 60.
[3]	任英, 李鑫哲, 袁天祥, 等. 热轧卷板表面夹渣缺陷来源分析及控制现状[J]. 钢铁, 2022, 57(1): 13.
[4]	刘成松,李京社,高晓杰,等. BOF-LF-CC工艺生产SPHC钢的洁净度[J]. 钢铁, 2015, 50(2): 27.
[5]	殷雪,孙赛阳,孙彦辉,等. 低碳铝镇静钢中间包浇注过程夹杂物的行为[J]. 钢铁, 2014, 49(8): 21.
[6]	王超,张慧,王明林,等. 电磁搅拌下圆坯结晶器内卷渣现象的物理模拟[J]. 钢铁, 2014, 49(6): 48.
[7]	潘晓倩,杨健,职建军,等. 超低碳汽车外板BH钢炼钢过程中夹杂物的演变[J]. 钢铁, 2019, 54(8): 48.
[8]	张建斌,徐建飞,王昆鹏,等.GCr15轴承钢连铸过程MgO·Al2O3夹杂物形成机理[J/OL].钢铁:1-10[2023-04-03].DOI:10.13228/j.boyuan.issn0449-749x.20220703.
[9]	罗衍昭,田志红,李向奎,等.超低碳IF钢中夹杂物来源的示踪分析[J].中国冶金,2019,29(9):56.
[10]	刘道绪,杨树峰,郑宏波,等.中间包覆盖剂中的Cr2O3对二次氧化的影响[J].中国冶金,2018,28(增刊1):22.
[11]	程礼梅,张立峰. 中间包覆盖剂碱度对熔化和润湿性能的影响[J]. 中国冶金,2018,28(增刊1):13.
[12]	张敏,谢鑫,曾建华,等. 40Cr10Si2Mo钢质洁净度工艺技术研究[J]. 炼钢,2019,35(6):67.
[13]	陈兴润,胡桓彰. 中间包覆盖剂对430不锈钢钢水洁净度的影响[J]. 中国冶金,2017,27(8):36.
[14]	徐迎铁,陈兆平,杨宝权. 轴承钢Ds类大颗粒夹杂物研究[J]. 炼钢,2016,32(4):49.
[15]	KEKKONEN M, LEUVERINK D, HOLAPPA L. Improving cleanliness of 16MnCrS5 case hardening steels by optimized active tundish flux[J]. Steel Research Int, 2017, 88(7): 1600364.
[16]	杨伶俐,包燕平,刘建华,等. 连铸中间包覆盖剂冶金效果分析[J]. 炼钢,2007,23(2):34.
[17]	KIM T S, LEE S B, PARK J H. Effect of tundish flux on compositional changes in non-metallic inclusions in stainless steel melts[J]. ISIJ Int, 2021, 61(12): 2998.
[18]	陈荣欢,王妍,职建军,等. 宝钢高碱度中间包覆盖剂的开发[J]. 炼钢,2005,21(1):21.
[19]	王建昌. 高碱度中间包覆盖剂对改善0Cr18Ni19不锈钢洁净度的影响[J]. 特殊钢,2015, 36(4):38.
[20]	BESSHO N, YAMASAKI H, FUJII T, et al. Removal of inclusion from molten steel in continuous casting tundish [J]. ISIJ Int, 1992, 32(1): 157.
[21]	杨海滨. 覆盖剂在连铸生产中的应用及比较[J]. 连铸,2011(3):12.
[22]	曾立,刘航, 梅宁, 等. 中间包板间密封不良的原因分析和改进[J]. 连铸, 2023(1): 106.
[23]	刘喜锚. 控流装置对四流中间包钢水洁净度的影响[J]. 连铸, 2022(5): 88.
[24]	谢旭琦,方庆,王家辉,等.双流板坯中间包加高提升钢液洁净度的数理模拟[J/OL].中国冶金:1-14[2023-04-03].DOI:10.13228/j.boyuan.issn1006-9356.20230074.
[25]	王章岭,李向奎,刘鸿明,等.多模式全连续铸轧产线卷渣缺陷分析及控制[J].中国冶金,2022,32(9):52.
[26]	王家辉,张华,方庆,等.顶旋型湍流抑制器优化中间包流场的物理模拟[J].钢铁,2023,58(02):72.
[27]	石树东,胡显堂,张虎成,等.薄板坯连铸保护浇注工艺研究[J].河北冶金,2021(9):39.
[28]	秦绪锋,程常桂,李阳,等.上水口环形吹氩对中间包内渣眼形成的影响[J].钢铁,2019,54(8):107.
[29]	谢健. 碱性中间包覆盖剂结壳机理分析[J]. 材料与冶金学报,2010,9(1):15.
[30]	WANG D, ZHANG Z, WANG H, et al. Characteristic analysis of solidified crust for basic tundish flux with Al-killed steel casting[J]. Journal of Iron and Steel Research International, 2011, 18(1): 16.
[31]	吴晓东,刘青,徐安军,等. 宝钢炼钢厂连铸中间包钢水温度的研究[J]. 钢铁,2001,36(8):19.
[32]	邓勇, 杨利彬, 汪成义. 马钢低碳钢板坯高拉速连铸技术的应用[J]. 连铸, 2022(1): 72.
[33]	陈天明,陈永,陈亮,等. 提高方圆坯铸机连浇炉数的工艺及装备技术[J]. 钢铁,2014,49(2):34.
[34]	余相灼,杨建平,李想,等.基于“炉机对应”原则的连浇优化方案[J].中国冶金,2019,29(4):22.
[35]	刘庆岗,王一洲. 汽车钢DC03夹杂物产生原因分析及改进措施[J]. 中国冶金,2016,26(2):25.
[36]	YU J Y, KANG Y, SOHN I. Novel application of alkali oxides in basic tundish fluxes for enhancing inclusion removal in 321 stainless steels[J]. Metallurgical and Materials Transactions B, 2014, 45(1): 113.
[37]	CHOI K, KANG Y, SOHN I. Effect of Rb2O and Cs2O on inclusion removal in 321 stainless steels using novel basic tundish fluxes[J]. Metallurgical and Materials Transactions B, 2016, 47(3): 1520.