中间包板间密封不良的原因分析和改进

doi:10.13228/j.boyuan.issn1005-4006.20220061

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Abstract In order to solve the problems of secondary oxidation of liquid steel and steel spilt between plates caused by poor sealing between tundish plates in the production process of continuous casting machine, the influence of quick change mechanism oil cylinder, mechanism slideway, mechanism spring pressure, water mouth baking and water mouth plate surface on sealing effect was analyzed by field tracking system.The results show that the lax sealing between plates is mainly related to the equipment accuracy of the quick change mechanism, the surface quality of the nozzle plate and the baking process operation. By monitoring the slide and spring pressure of the quick change mechanism, optimizing the baking system of the upper nozzle and submerged nozzle, standardizing the flatness of the plate surface, applying graphite emulsion on the plate surface, and implementing fine operation, the sealing performance between tundish plates is greatly improved in the process of continuous casting production, the qualified rate of argon pressure of inter plate seal was increased from 75% to 98%, and the occurrence rate of mold liquid level fluctuation over ±3 mm caused by inter plate suction decreased from 3.0% to less than 0.1%, the steel growth rate between plates is reduced from 1.5% to less than 0.01%.

Key words： tundish slide surface sealing quick-replacement equipment liquid level fluctuation

Received: 29 April 2022

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20220061 OR http://www.chinamet.cn/Jweb_lz/EN/Y2023/V42/I1/106

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