A final pouring method of continuous casting ladle based on the comparison of passing steel quantity

Abstract

The invention belongs to the technical field of iron and steel metallurgy continuous casting, and in particular relates to a continuous casting ladle final pouring method based on the comparison of the amount of passing steel. By accurately calculating the theoretical passing amount of steel and comparing the theoretical and actual passing amounts, it is judged that the vortex formation occurs at the end of the ladle. The critical height of molten steel for lowering slag, and at the same time calculate the weight of ladle molten steel needed to control the sliding plate, so as to calculate the starting point of controlling the sliding plate at the end; finally, judge the opening degree of the ladle sliding plate mechanism by calculating the comparison of the amount of steel passing through the ladle and the tundish , so as to feedback control the opening of the sliding plate, delay the formation of the slag vortex at the end of the ladle pouring, and finally realize the maximum reduction of the remaining steel in the ladle and the effective and reasonable control of the slag in the ladle.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy continuous casting, and in particular relates to a continuous casting ladle final pouring method based on the comparison of the amount of passing steel. Background technique [0002] In the current continuous casting production process of the iron and steel industry, molten steel is injected from the ladle into the tundish, and then the tundish is distributed to the mold, and finally solidified and crystallized by the mold and cast into billets. During the process of molten steel flowing from the ladle into the tundish, when the pouring is about to end, the steel slag in the ladle will mix with the molten steel and flow into the tundish through the long nozzle to form slag. In order to reduce the impact of slag from the ladle, the existing continuous casting process, when the ladle is finally poured, uses manual or automatic slag detection means to judge the appearance of steel s...

AI Technical Summary

Problems solved by technology

The only one that mentions using the amount of steel passed and the weight of molten steel to control the sliding plate in advance to reduce the slag at the end of pouring is a continuous casting ladle final pouring control system and process control method based on a ladle slag detection system with application number CN 201510091824 ; but this method is only announced and involves the need to control the opening of the slide and the weight of the tundish to optimize the final pouring method, delaying the formation of the vortex at the bottom of the ladle to reduce the remaining steel in the ladle

However, this method does not mention how to calculate the tonnage of the tundish before controlling the sliding plate, accurately calculate and judge the critical height of the slag vortex formation under the ladle, and the specific control method of the sliding plate control.

The published method of controlling the sliding nozzle to reach the target opening based on the steel-passing speed, the average opening of the sliding nozzle, and the method of controlling the sliding nozzle to reach the target opening cannot be realized in actual field use without adding a position sensor for the opening of the sliding plate.

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