Long-service-life tundish lower nozzle excellent in abrasion resistance and flushing resistance

Abstract

The invention discloses a long-service-life tundish lower nozzle excellent in abrasion resistance and flushing resistance. The long-service-life tundish lower nozzle comprises a sliding plate face body, a sliding plate face zirconium oxide core, a brick cup, a lower body, a lower body zirconium oxide core, a lower body bowl opening and a lower body molten steel channel. The sliding plate face zirconium oxide core comprises a bowl opening, a lower body zirconium oxide core clamping groove and a molten steel channel, and the sliding plate face zirconium oxide core is connected with the lower body through the lower body zirconium oxide core clamping groove. According to the long-service-life tundish lower nozzle, the sliding plate face zirconium oxide core in contact with an upper nozzle is made of a high-purity zirconium oxide material, and the sliding plate face zirconium oxide core and the lower body zirconium oxide core are connected together to form a T-shaped structure, so that theabrasion resistance and molten steel flushing resistance of the lower nozzle are enhanced, molten steel splashing accidents are avoided, and the service life of the lower nozzle is prolonged; and thelower body is made of an aluminum-carbon material, and a lining is made of a zirconium oxide core, so that the manufacturing cost of the lower nozzle is reduced, the production cost is saved, and theproduction requirements of continuous casting steel are met.

Description

technical field [0001] The invention relates to the technical field of continuous casting of refractory materials, in particular to a long-life tundish outlet nozzle with excellent wear resistance and flushing resistance. Background technique [0002] In the process of continuous steel casting, molten steel continuously passes through the water-cooled crystallizer, condenses into a hard shell, and then is continuously pulled out from the outlet below the crystallizer, cooled by spraying water, and solidified to form a steel billet of the desired shape. The tundish nozzle is an important part of the continuous casting production process. In continuous steel casting, the existing tundish nozzles are usually embedded with zirconium cores inside the upper and lower nozzle bodies, the contact area of ​​the zirconium cores at the upper and lower nozzles is small, and the resistance to molten steel erosion, wear resistance and slag erosion is relatively high. Poor, the position wh...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the small contact area of ​​the zirconium core of the existing upper and lower nozzles, the poor performance of molten steel erosion resistance, wear resistance and slag erosion resistance, and the contact position of the upper and lower nozzles of the lower nozzle is easily damaged by the rinsing of molten steel , the service life is short, it is easy to cause the occurrence of steel incidents, and there are technical problems of potential safety hazards. It provides a long-life tundish nozzle with excellent wear resistance and scouring performance, which has excellent anti-oxidation, resistance to molten steel erosion and slag erosion. performance, prolong the service life of the drain, and improve the quality of steel produced

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