Protective structure for steel ladle slide water hole and using method of protective structure

Abstract

The invention belongs to the field of steel ladles, and specifically discloses a protective structure for a steel ladle slide water hole and a using method of the protective structure. The slide waterhole is formed in a slide mould frame; the slide water hole is connected to the slide mould frame through a regulating mechanism; the regulating mechanism comprises a regulating bolt; the regulatingbolt comprises a regulating bolt body; a gas supply channel is axially arranged on the regulating bolt body; one end of the regulating bolt is arranged at the outer side of the slide mould frame, andthe other end of the regulating bolt extends into the slide mould frame; and the regulating bolt is connected with an argon gas supply part. The invention discloses the protective structure for the steel ladle slide water hole. Argon gas protection on the periphery of the slide plate is added on the basis of the original technology. A steel ladle slide water hole argon-sealing method is adopted, so that oxidation-free protective casting of the steel ladle slide water hole is realized, oxygen aeration and nitrogen pickup are reduced to the greatest extent in a molten steel continuous casting process, and conditions are created for super-clean steel continuous casting production.

Description

technical field [0001] The invention belongs to the field of steel ladles, in particular to a protective structure for a steel ladle sliding nozzle and an application method thereof. Background technique [0002] With the rapid development of my country's economy, industries such as automobiles, petroleum, and machinery manufacturing have higher and higher requirements for steel materials. How to smelt ultra-pure steel has become an important task in the field of steel materials today. [0003] The cleanliness of steel refers to the quantity, size, distribution and shape of non-metallic inclusions in steel. In order to prevent the secondary oxidation (increase of oxygen and nitrogen) of the molten steel after refining and ensure the cleanliness of the slab, it is necessary to isolate the molten steel from air during the casting process. [0004] At present, the ladle to the tundish adopts long nozzle + sealing gasket + argon gas protection; the liquid surface of the tundish...

AI Technical Summary

Problems solved by technology

[0009] The seal between the upper and lower slides can only be guaranteed by the smoothness of the contact surface of the two slides. During the casting process, the upper and lower slides often slide relative to each other and the high-temperature molten steel erodes and radiates. From the slides after use, it can be seen that the contact surface of the slides has Obvious oxidative decarburization phenomenon, and there are cracks

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