Ladle blowing argon upper nozzle seat brick and preparation method thereof

Abstract

The invention relates to a ladle argon blowing upper nozzle seat brick and a preparation method thereof, comprising a ladle argon blowing upper nozzle block body, a diffused breathable ring, an air chamber, an air inlet pipe, an air chamber cover plate, an iron ring, and a ladle argon blowing upper nozzle The middle part of the nozzle seat brick body is provided with a steel flow hole that penetrates up and down, and an upper nozzle installation hole. The ladle blown argon upper nozzle block body is provided with a diffused breathable ring, an air chamber and an air chamber cover plate from top to bottom, and a diffused breathable ring. The upper end of the upper end of the ladle protrudes from the upper surface of the block body of the argon-blowing upper nozzle of the ladle. The air chamber is formed at the bottom of the diffused air-permeable ring. The lower opening of the air chamber is provided with an air chamber cover plate. It communicates with the air chamber, and the other end extends from the side of the brick body of the ladle blowing argon upper nozzle. The pouring construction tire mold assembly and pouring construction of the preparation of the ladle blowing argon upper nozzle brick of the present invention adopts the upper and lower inversion method, which solves the technical problem that the diffused air-permeable ring cannot be easily fixed.

Description

technical field [0001] The invention relates to a ladle blowing argon upper nozzle seat brick and a preparation method thereof, and belongs to the technical field of steelmaking process in iron and steel metallurgy. Background technique [0002] Bottom blowing argon in the LF refining ladle is a simple and efficient refining technology outside the furnace. It is generally divided into two stages: large flow argon blowing, stirring and mixing in the early stage and soft blowing with low flow rate to remove inclusions in the later stage. At present, domestic LF refining ladles of more than 100 tons generally use two bottom blowing air bricks. The processing time of high-quality steel is generally more than 40 minutes, of which soft blowing is 8-12 minutes. At present, there are the following problems or deficiencies in production practice: (1 ) Insufficient soft blowing time affects the removal effect of inclusions; (2) Excessive LF refining time causes mismatch between furnac...

AI Technical Summary

Problems solved by technology

At present, domestic LF refining ladles of more than 100 tons generally use two bottom blowing air bricks. The processing time of high-quality steel is generally more than 40 minutes, of which soft blowing is 8-12 minutes. At present, there are the following problems or deficiencies in production practice: (1 ) Insufficient soft blowing time affects the removal effect of inclusions; (2) Excessive LF refining time causes mismatch between furnace and machine, which becomes a restrictive link for increasing production and efficiency

However, in the nozzle seat brick in this patent, when the breathable ring is positioned in the mold for preparing the ventilating upper nozzle seat brick body of the ladle, and during the pouring process of the castable, the air chamber is easy to enter the castable foreign matter, which will affect the air permeability and the air intake pipe is not fixed firmly. This leads to the problem of air leakage, and there are problems such as large cracks in the lower part of the ladle upper nozzle block body where the upper nozzle is installed, which affects the service life.

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