薄板坯连铸结晶器铜板厚度对传热行为影响

doi:10.13228/j.boyuan.issn1005-4006.20230026

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Abstract Based on the actual production data of thin slab continuous casting production line, the influence of copper plate thickness on the mold heat flux density and production stability was studied. The results showed that as the copper plate thickness decreased from 44.2 mm to 39.2 mm, the mold heat flux density increased from 2.65 MW/m² to 2.82 MW/m², and the mold “cold tooth” index increased from 0.4 to 17.5, greatly affecting production stability. In order to improve heat transfer stability and solve the problem of increasing mold heat flux due to the thinning of copper plate thickness, the cooling water volume of the mold was optimized and the relationship between copper plate thickness and cooling water flow rate was established. The thickness of the mold copper plate was reduced from 45 mm to 39 mm, and the cooling water flow rate was reduced from 8 500 L/min to 7 225 L/min. When producing low-carbon steel at a casting speed of 5.3 m/min, the mold wide surface heat flux can be stably controlled between 2.7 MW/m² and 2.8 MW/m². At the same time, the minimum flow rate of cooling water is 11 m/s, which can still make the copper plate and cooling water in a forced convection state, ensuring the service life of the copper plate. The “cold tooth” index of the mold is reduced from 3.85 to 0.73, effectively improving the quality of the casting slabs and production stability.

Key words： thin slab mold copper plate thickness cooling water flow rate heat flux density

Received: 11 April 2023

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	Articles by authors
	MA Shuo
	LUO Yan-zhao
	ZHANG Cong-cong
	WANG Hao
	WANG Sheng-dong
	JI Chen-xi

Cite this article:

MA Shuo,LUO Yan-zhao,ZHANG Cong-cong等. Effect of copper plate thickness on heat transfer behavior in thin slab continuous casting mold[J]. CONTINUOUS CASTING, 2023, 42(3): 42-46.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20230026 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I3/42

[1]	THOMAS B G. Review on modeling and simulation of continuous casting[J]. Steel Research International, 2018, 89(1): 1700312.
[2]	KLINKENBERG C, KINTSCHER B, HOEN K, et al. More than 25 years of experience in thin slab casting and rolling current state of the art and future developments[J]. Steel Research International, 2017, 88(10): 1700272.
[3]	MUNTIN A V. Advanced technology of combined thin slab continuous casting and steel strip hot rolling[J]. Metallurgist, 2019, 62(9/10): 900.
[4]	JAYAKRISHNA P, CHAKRABORTY S, GANGULY S, et al. Modelling of thermofluidic behaviour and mechanical deformation in thin slab continuous casting of steel: An overview[J]. Canadian Metallurgical Quarterly, 2021, 60(4): 320.
[5]	张剑君. 高品质钢薄板坯连铸关键技术研究[D]. 北京:钢铁研究总院, 2019.
[6]	张剑君, 毛新平, 王春峰, 等. 薄板坯连铸连轧炼钢高效生产技术进步与展望[J]. 钢铁, 2019, 54(5): 1.
[7]	杨刚, 李宝宽, 于洋, 等. 薄板坯连铸结晶器铜板的三维传热分析[J]. 金属学报, 2007, 43(3): 332.
[8]	刘旭东, 朱苗勇, 程乃良. 板坯连铸结晶器的热弹塑性力学分析[J]. 金属学报, 2006, 42(11): 1137.
[9]	孟祥宁, 王卫领, 朱苗勇. 冷却结构对连铸结晶器铜板应力分布的影响[J]. 中国有色金属学报, 2012, 22(8): 2238.
[10]	刘增勋, 张朝阳, 肖鹏程, 等. 冷却工艺对高速连铸结晶器传热的影响[J]. 钢铁, 2021, 56(5): 41.
[11]	杨杰, 姚海明, 郝占全. 薄板坯连铸高拉速技术研究[J]. 连铸, 2016(5): 47.
[12]	马坤霞, 刘士朝, 郝立卿, 等. 薄板坯连铸机高拉速下铸坯表面质量控制实践[J]. 连铸, 2014 (3): 39.
[13]	NIU Z, CAI Z, ZHU M. Heat transfer behaviour of funnel mould copper plates during thin slab continuous casting and channel structure optimization[J]. Ironmaking and Steelmaking, 2020, 47(10): 1135.
[14]	ZHANG L, ZHANG C, XIAO P, et al. Heat transfer behaviour of funnel mould copper plates with high casting speed during different water supply processes[J]. Ironmaking and Steelmaking, 2022, 49(8): 771.
[15]	王皓, 王国连, 马硕, 等. MCCR 产线低碳钢高拉速技术研究与应用[J]. 中国冶金, 2022,32(12): 88.
[16]	张朝阳. 冷却工艺对薄板坯结晶器传热的影响[D]. 唐山:华北理工大学, 2021.
[17]	张路平, 肖鹏程, 刘增勋, 等. 超高速连铸结晶器内坯壳的传热行为[J]. 连铸, 2021(6): 17.
[18]	吴豪, 蔡兆镇, 牛振宇, 等. 薄板坯连铸结晶器铜板热/力行为[J]. 中国冶金, 2021, 31(12): 79.
[19]	宁英衣. 异型坯连铸机Q235B生产实践及工艺[J]. 连铸, 2023(1): 118.