厚板包晶钢保护渣的开发与应用

doi:10.13228/j.boyuan.issn1005-4006.20200145

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Abstract In view of inapplicability of the initial mold flux after the transformation of No. 3 heavy plate continuous caster in Baosteel, new mold flux for peritectic steel with high viscosity and high crystallization temperature was developed in combination with the casting process characteristics. Firstly, the effects of basicity, Na₂O and F on crystallization temperature were studied in the laboratory. The results showed that, within the studied content range, decreasing F was beneficial to increasing crystallization temperature. When Na₂O content was 4%, crystallization temperature was the highest, the basicity was higher, and the crystallization temperature was higher. By reducing basicity and F, the viscosity can be improved, F and Na₂O can be optimized to make up for the shortage of low basicity. Three kinds of mold flux have been developed successively to steadily increase the crystallization temperature, so as to ensure that the mold flux will not affect the normal continuous casting production due to insufficient lubrication function during the test. After more than one year of production practice, the mold flux for peritectic steel with crystallization temperature exceeds 1 200 ℃ completely meets the requirements. After batch application, the annual average incidence of slab longitudinal crack is reduced to 0.26%, reaching the expected target.

Key words： continuous casting heavy plate peritectic steel mold flux crystallization temperature

Received: 17 December 2020

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	Articles by authors
	ZHANG Chen
	CAI De-xiang
	XU Guo-dong
	FAN Ying-tong

Cite this article:

ZHANG Chen,CAI De-xiang,XU Guo-dong等. Development and application of mold flux for heavy plate peritectic steel[J]. CONTINUOUS CASTING, 2021, 40(2): 51-56.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20200145 OR http://www.chinamet.cn/Jweb_lz/EN/Y2021/V40/I2/51

[1]	何宇明, 朱斌, 陈文满. 重钢中厚板表面微裂纹攻关实践[J]. 钢铁研究,2001(6): 33.
[2]	Hidenori M, Hisao E, Kei S, et al. Analysis of the crystallization of mold flux for continuous casting of steel[J]. Transactions of the Iron and Steel Institute of Japan, 2008, 48(3):277.
[3]	Cho J, Shibata H, Emi T, et al. Thermal resistance at the interface between mold flux film and mold for continuous casting of steels[J]. ISIJ International, 1998, 38(5):440.
[4]	龙潇, 何生平, 王谦. 包晶钢连铸保护渣固渣膜粗糙度影响因素[J]. 钢铁研究学报,2017,29(7): 551.
[5]	翁建军. 高碱度高润滑性连铸保护渣的研究和应用[J]. 炼钢,2016, 32(1):52.
[6]	曹磊. 包晶钢连铸坯表面纵裂与保护渣性能选择[J]. 钢铁,2015,50(2):38.
[7]	朱礼龙, 何生平, 毛敬华, 等. 特厚板连铸保护渣系列规划[J]. 钢铁,2016,51(3):44.
[8]	陈永艳, 李晓阳, 赵春宝, 等. 特厚板中碳低合金钢用结晶器保护渣的研制与应用[J]. 炼钢,2018,34(3):43.
[9]	成泽伟,陈伟庆,李联生, 等. 保护渣性能对结晶器内传热的影响[J]. 北京科技大学学报,2003,25(6):524.
[10]	陈俊孚, 李丽坤, 杨成威, 等. 六种工业包晶钢保护渣传热性能的比较研究[J]. 武汉工程职业技术学院学报, 2014,26(4):5.
[11]	陈俊孚, 黄建阳, 万恩同,等. 碱度对含钴包晶钢保护渣传热性能的影响[J]. 连铸,2016 (2):17.
[12]	Hayashi M, Watanabe T, Nakada H, et al. Effect of Na2O on crystallization of mould fluxes for continuous casting of steel[J]. ISIJ International, 2006, 46(12):1805.