Ladle nozzle slag entrapment prevention dam control method

Abstract

The invention discloses a ladle nozzle slag entrapment prevention dam control method, and relates to the technical field of molten steel smelting. According to the ladle nozzle slag entrapment prevention dam control method, a linear slag entrapment prevention dam is poured between the north side of a ladle bottom nozzle and the ladle wall, the pouring material and the ladle bottom working layer material are corundum spinel pouring materials, the height is 400mm, under the action of the nozzle slag entrapment prevention dam, the strength of eddy current formed in the ladle in the pouring process is weakened, and dross on the upper portion of molten steel is effectively prevented from being involved into a continuous casting tundish along with the eddy current. According to the ladle nozzle slag entrapment prevention dam control method, the ladle nozzle slag entrapment prevention dam is arranged, the large ladle slag discharging amount can be effectively reduced, under the action of the dam, the strength of the eddy current formed in the ladle in the pouring process can be weakened, the situation that steel slag is involved into the tundish along with the eddy current is effectively reduced, and the aims of improving the molten steel and casting blank cleanliness and effectively improving the plate blank quality are achieved.

Description

technical field [0001] The invention relates to the technical field of molten steel smelting, in particular to a method for controlling a ladle nozzle anti-slag retaining dam. Background technique [0002] At present, the ladles used by major domestic steel mills are not equipped with anti-slag dams at the nozzles. During the pouring process, the molten steel forms a strong eddy current in the ladle. The eddy current is involved in the continuous casting tundish, causing the molten steel to produce large slag during the pouring process, polluting the tundish molten steel, resulting in the failure to effectively control the inclusions in the molten steel, and easily causing inclusions in the casting slab, which has a negative impact on the quality of the slab Negative Effects. Contents of the invention [0003] (1) Solved technical problems [0004] Aiming at the deficiencies of the prior art, the present invention provides a ladle nozzle anti-slag dam control method, whi...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a ladle nozzle anti-slag dam control method, which solves the problem that the steel ladles used in major domestic steel mills are not equipped with nozzle anti-slag dams during the pouring process. A strong eddy current is formed in the ladle. During the pouring process, especially in the later stage of pouring, the scum on the upper part of the molten steel will be involved in the continuous casting tundish with the eddy current, causing the molten steel to produce large slag during the pouring process and pollute the tundish. In molten steel, the inclusions in the molten steel cannot be effectively controlled, and it is very easy to cause inclusions in the billet, which will adversely affect the quality of the billet.

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