Continuous casting steel ladle final pouring method based on steel flow amount comparison

Abstract

The invention belongs to the technical field of iron and steel metallurgy continuous casting, and particularly relates to a continuous casting steel ladle final pouring method based on steel flow amount comparison. The molten steel critical height at which vortexes are generated by a steel ladle in the last period to form slag discharging is judged by precisely calculating the theoretical steel flow amount and comparing the theoretical steel flow amount with the actual steel flow amount, meanwhile, the bale molten steel weight needed by controlling a sliding plate is calculated, and thereforethe initial point at which the sliding plate starts to be controlled in the last period is calculated; and finally the opening degree of a steel ladle sliding plate mechanism is judged by calculatingand comparing the steel flow amounts of the steel ladle and a tundish, thus, the opening degree of the sliding plate is fed back and controlled, forming of the slag entrapping vortexes in the pouringlast period of the steel ladle is put off, and finally the purposes of reducing waste steel of the steel ladle to the maximum degree and effectively and reasonably controlling slag discharging of thesteel ladle are achieved.

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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