钢包长水口返钢原因分析与控制

doi:10.13228/j.boyuan.issn1005-4006.20220157

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Abstract The submerged start-up of ladle shroud inserted into tundish is an important means to eliminate the secondary oxidation of molten steel and improve the quality of molten steel in continuous casting process. However, the submerged start-up is easy to lead to the return of steel at the bowl of shroud. In view of the steel returning from the ladle shroud immersed open casting bowl, the specific causes were summarized from two aspects of equipment accuracy and process operation through on-site tracking analysis. The analysis results show that the ladle shroud immersed open cast steel return is related to the process operation method, the manipulator precision and the bead unseating precision. By improving the operation mode of wearing shroud, reforming the manipulator and detaching ring, standardizing immersion depth and other measures, steel return rate of ladle shroud is reduced from 0.2% to 0, and qualified rate of nitrogen increase of all steel grades is increased from 94% to 98%.

Key words： shroud molten steel return reoxidation nitrogen increase tundish

Received: 26 September 2022

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	Articles by authors
	MEI Ning
	HAN Long
	YUAN Tianxiang
	WANG Yaning
	YANG Chunbao
	ZHAO Changliang
	LIU Yanqiang

Cite this article:

MEI Ning,HAN Long,YUAN Tianxiang等. Cause analysis and control of molten steel return at ladle shroud[J]. CONTINUOUS CASTING, 2023, 42(4): 68-72.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20220157 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I4/68

[1]	包燕平,王敏. 中间包冶金技术发展趋势[J]. 连铸,2021(5):2.
[2]	朱坦华,周秋月,任英.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.
[3]	刘逸波,杨健. 中间包流场控制技术的进展[J]. 连铸,2021(5):12.
[4]	王凯民,唐海燕,肖红,等. 六流双通道感应加热中间包钢水流动控制[J]. 中国冶金,2022,32(2):84.
[5]	张硕,刘建华,苏晓峰,等. 中间包微气泡冶金技术发展[J]. 连铸,2021(5):34.
[6]	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]. 中国冶金, 2023, 33(6): 95.
[7]	王锦, 刘宇航, 刘威, 等. 基于中间包冲击区的流场优化[J]. 中国冶金, 2023, 33(4): 97.
[8]	祝航航, 王敏, 姚骋, 等. 六流T型中间包夹杂物去除行为的数值模拟[J]. 中国冶金, 2022, 32(8): 89.
[9]	武光君,王中学,高立福.连铸中间包环形气幕挡墙吹氩冶金技术开发与应用[J]. 连铸,2019(5):21.
[10]	程瑾琦,张立强,伏凯旋,等. 钢包长水口吹氩自动控制系统研究与应用[J]. 钢铁研究学报,2022,34(6):562.
[11]	阳祥富,常文杰,钟良才,等. 连铸长水口吹氩气泡行为的试验研究[J]. 炼钢,2018,34(2):12.
[12]	刘建华,李巍,何杨,等. 长水口吹氩生成微小气泡工业试验研究[J]. 工程科学学报,2022,44(7):1183.
[13]	张江山,刘青,杨树峰,等. 长水口对连铸中间包钢液保护浇注作用的研究进展[J]. 工程科学学报,2020,33(5):940.
[14]	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.
[15]	常朋飞, 俞学成, 孙亮, 等.板坯连铸机全保护浇注工艺优化[J].河北冶金,2021(12):51.
[16]	孙鑫宇.ER50-6焊丝钢冶炼降氮工艺优化[J].河北冶金,2021(4):37.
[17]	刘志远, 罗志国, 顾英杰,等. 旋流钢包长水口对夹杂物碰撞聚合影响的数值模拟[J]. 钢铁研究学报,2021,34(6):408.
[18]	李尚兵,陈远清,黄建军,等. 钢包长水口结构优化对钢水增氮的试验研究[J]. 炼钢,2020,36(6):46.
[19]	阮飞,赵凤光,揭畅,等. 异型坯连铸长水口浸入深度对中间包流动特性的影响[J]. 连铸,2015(3):10.
[20]	宫江容,商红梅,宋新虎. 连铸钢包长水口操控方式分析探讨[J]. 现代冶金,2021,49(2):42.
[21]	安领军,刘俊山,刘志国,等. 邯钢板坯连铸机钢包长水口机械手设计改造[J]. 连铸,2011(5):26
[22]	叶林. 长水口机械手自动同步技术在宝钢的应用[J]. 中国冶金,2010,20(6):31.
[23]	陈洋,欧西达,卫海瑞,等. 两流中间包控流装置优化的物理模拟与应用[J]. 连铸,2019(4):76
[24]	王伟,朱立光,张彩军.双流T-型中间包的流场模拟及其控流结构优化[J]. 连铸,2020(2):62
[25]	李慕耘,万恩同,陈俊孚. 新型长水口密封圈的研制与应用[J]. 连铸,2019(2):12.
[26]	韩全军,刘国梁,马文俊,等. 控流装置对中间包钢水流场和洁净度的影响[J]. 连铸,2021(5):10.
[27]	于占泉,张芙丽. 钢包长水口机械手液压系统故障分析与处理[J]. 机床与液压,2017,45(14):162.