连铸中间包充氩置换影响因素分析及生产实践

doi:10.13228/j.boyuan.issn1005-4006.20200061

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Abstract Aiming at the poor results of argon filling replacement in the tundish before the start of pouring in No.4 Steel-making and Rolling General Plant of Ma'anshan Iron and Steel Co., Ltd., the influencing factors of the tundish argon filling replacement were studied under cold measurement experiments by using a portable flue gas analyzer,and the optimization measures were proposed. The results showed that increasing the pressure of argon filling, having a good seal of the bake holes of the tundish, between the tundish lids and the tundish lids between the tundish can effectively improve the effect of argon filling replacement. Under normal production conditions after optimization, when the diameter of the tundish argon filling tube is ø30 mm and the argon filling pressure is 1.4-1.6 MPa, the oxygen volume fraction after argon filling can be effectively reduced to less than 1%. When the diameter of the tundish argon filling tube is ø15 mm and the argon filling pressure is 0.8-1.0 MPa, the oxygen volume fraction after argon filling can be effectively reduced to less than 2%

Key words： continuous casting argon filling replacement tundish seal secondary oxidation cast starting process

Received: 15 May 2020

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	YANG Ke-zhi

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YANG Ke-zhi. Influencing factors analysis and production practice of tundish argon filling replacement in continuous casting[J]. CONTINUOUS CASTING, 2020, 39(6): 38-41.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20200061 OR http://www.chinamet.cn/Jweb_lz/EN/Y2020/V39/I6/38

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