Steel ladle side-blowing powder-spraying molten steel refining device and method

Abstract

The invention belongs to the technical field of steel and iron refining, and particularly relates to a steel ladle side-blowing powder-spraying molten steel refining device and a method. The steel ladle side-blowing powder-spraying molten steel refining device comprises a steel ladle, a powder-spraying tank, side-blowing powder-spraying air permeable bricks and bottom-blowing air permeable bricks;the steel ladle comprises a steel ladle side wall and a steel ladle bottom, the side-blowing powder-spraying air permeable bricks are embedded at the steel ladle side wall, the bottom-blowing air permeable bricks are embedded at the steel ladle bottom, and the side-blowing powder-spraying air permeable bricks and the powder-spraying tank are connected through a pipeline. According to the steel ladle side-blowing powder-spraying molten steel refining device and the method, powder-spraying elements are not blocked and are long in service life.

Description

Technical field [0001] The invention belongs to the technical field of steel refining, and in particular relates to a device and method for refining molten steel by side blowing powder injection on a ladle. Background technique [0002] With the upgrading of social industries, people have higher and higher requirements for the quality of steel, which requires the harmful elements in steel to be as low as possible, such as elements such as sulfur. Now people have succeeded in spraying powder by blowing at the bottom of the ladle, but the life of the breathable brick encountered in the powder spraying process is low, and the problem of powder congestion cannot be ignored. [0003] After in-depth study of the reduced life of the breathable bricks and the bricks with congested gaps, it was found that there were a series of pits in the center of the blocked breathable bricks. At the end of pouring steel, the remaining molten steel and liquid slag remained at the core of the breathable b...

AI Technical Summary

Problems solved by technology

[0005] At present, some researchers have conducted research on side-blowing powder injection. The disadvantage is that the powder injection device is a capillary steel pipe, and the steel pipe is pre-buried in the refractory material of the ladle wall, which will cause a great impact on production. Uncertainty, at the end of the furnace service, the refractory material of the ladle wall becomes thinner, and even the outer steel shell of the ladle is exposed. At this time, the powder pipe will be directly exposed to the molten steel, which will cause great harm

In addition, it is not advisable to place the powder pipe outside the shell of the ladle. The ladle will inevitably be bumped during the production process. Putting the powder pipe outside the ladle will greatly reduce the life of the powder pipe.

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