A kind of slagging device and method for feeding steel belt of gas shielded continuous casting crystallizer

Abstract

The invention relates to a device and method for deslagging in steel strip feeding of a gas shield continuous casting crystallizer. The device and method for deslagging are used for the continuous casting crystallizer. Molten steel is positioned in the crystallizer, and the top surface of the molten steel is provided with covering slag. The deslagging device comprises a hollow cover body, the top of the cover body is provided with an upper cover, the upper cover is provided with a feeding port and an air inlet, the upper cover is used for feeding a steel strip, the air inlet is used for inert gas to enter, the lower end of the cover body enters the molten steel, and the bottom of the cover body is connected with a steel deslagging part. The steel deslagging part discharges the covering slag and enters the molten steel, and the size of the steel deslagging part is gradually reduced from top to bottom. The inert gas enters from the air inlet and is discharged through a hole of the feeding port, so as to protect the molten steel from oxidation. In the process of extending the deslagging device into the crystallizer, the steel deslagging part with the wide top and the narrow bottom discharges the covering slag, part of the cover body is soaked into the molten steel, and the covering slag is prevented from entering the cover body. Therefore, in the processing of inserting the steel strip into the molten steel, the molten steel is not touched, and the covering slag is prevented from entering the molten steel.

Description

technical field [0001] The invention belongs to the process of feeding a steel strip to a crystallizer in the continuous casting process of high-quality steel, in particular to a slagging device and method for feeding a steel strip to a gas-protected continuous casting crystallizer. Background technique [0002] The continuous casting process is a major technical progress and has been widely used in actual production, but there are still many problems restricting the quality of continuous casting products. In the continuous casting process, the main problems to be solved in the continuous casting production of thin strips and thin slabs are to improve the cleanliness of molten steel, increase the casting speed and have no defects on the surface of the slab. The common problems to be solved for medium-thick slabs, extra-thick slabs and thicker rectangular slabs are internal quality defects such as center segregation, center porosity, center cracks, and low equiaxed crystal ra...

AI Technical Summary

Problems solved by technology

However, there are still some problems with this technology in practical industrial applications

Since the steel belt needs to be extended into the crystallizer, if it is directly inserted, it is easy to bring mold slag into the molten steel, causing contamination of the molten steel

If the slag is directly discharged without taking protective measures, the molten steel will be exposed to the air, and its surface is easily oxidized, which will eventually affect the composition of the molten steel.

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