A slag stopper for ladle pouring slag stopper and its preparation and slag stopper method

Abstract

The invention discloses a floating plug for large-ladle pouring slag stopping, a preparation method of the floating plug for large-ladle pouring slag stopping and a slag stopping method. The floating plug is composed of a plug head part and a plug body part and prepared by mixing fireproofing materials, water reducing agents and binding agents. After molten steel is refined and leaves from a station, before pouring is carried out, the floating plug is put into a large ladle, eddy flowing generated by molten steel liquid level drawdown in the large-ladle pouring process is used, the floating plug operates to the position above a water gap bowl of the large ladle and is in point contact with the surface of the water gap bowl of the large ladle, and the slag stopping operation is accordingly completed. The interior and the exterior of the floating plug prepared with the method are homogenous, the density is even, location in the molten steel is accurate, the problem that manual judgment is inaccurate so that slag discharged from the large ladle in continuous casting production enters a middle ladle is solved, the slag stopping effect is remarkable, the slag discharging amount of the molten steel in the large-ladle pouring process is greatly reduced, the purity of the molten steel is improved, the blank casting quality is improved, and the performance of finished products of rolled metal is improved.

Description

technical field

[0001] The invention relates to a ladle pouring slag control device, in particular to a slag stopper for ladle pouring slag stopper and a preparation and slag stopper method, belonging to the technical field of continuous casting in metallurgical production. Background technique

[0002] At present, in the continuous casting production process, the ladle molten steel pouring operation must carry out the slag blocking operation to reduce and avoid the ladle pouring process. The ladle slag enters the tundish and pollutes the molten steel, thereby reducing the inclusions in the steel and improving the quality of the slab. Improve rolled properties. At present, the ladle pouring slag control methods are mainly divided into two categories, one is manual experience judgment, the stability of manual experience judgment is poor, and the ladle pouring is closed too early, resulting in more steel remaining in the ladle, resulting in waste, and the ladle pouring is clos...

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