Steel ladle argon blowing upper water gap brick cup and preparation method thereof

Abstract

The invention relates to a steel ladle argon blowing upper water gap brick cup and a preparation method thereof. The steel ladle argon blowing upper water gap brick cup comprises a steel ladle argon blowing upper water gap brick cup body, a diffused ventilation ring, a gas chamber, a gas inlet pipe, a gas chamber cover plate and an iron ring. A steel flowing hole and an upper water gap mounting hole which are through up and down are formed in the middle of the steel ladle argon blowing upper water gap brick cup body. The diffused ventilation ring, the gas chamber and the gas chamber cover plate are arranged in the steel ladle argon blowing upper water gap brick cup body from top to bottom. The upper end of the diffused ventilation ring stretches out of the upper surface of the steel ladleargon blowing upper water gap brick cup body. The gas chamber is formed at the bottom of the diffused ventilation ring. The gas chamber cover plate is arranged on a lower opening of the gas chamber. One end of the gas inlet pipe is welded to the gas chamber cover plate and communicates with the gas chamber, and the other end of the gas inlet pipe stretches from the side of the steel ladle argon blowing upper water gap brick cup body. The up-and-down inversion method is adopted in pouring construction moulding bed assembling and pouring construction for preparing a steel ladle argon blowing upper water gap brick, and the technical problem that the diffused ventilation ring cannot be fixed easily is solved.

Description

Technical field [0001] The invention relates to a ladle argon blowing upper nozzle base brick and a preparation method thereof, and belongs to the technical field of steelmaking in iron and steel metallurgy. Background technique [0002] Argon blowing at the bottom of LF refining ladle is a simple and efficient refining technology outside the furnace. It is generally divided into two stages: large flow argon blowing and mixing in the early stage and low flow soft blowing to remove inclusions in the later stage. At present, two bottom-blown air-permeable bricks are generally used for domestic LF refined ladle of more than 100 tons. The processing time of high-quality steel is generally more than 40 minutes, of which the soft blowing is 8-12 minutes. The following problems or deficiencies exist in production practice at present: (1 ) Insufficient soft blowing time affects the removal effect of inclusions; (2) Too long LF refining time causes mismatch of furnace and machine, which b...

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, which affects the removal effect of inclusions; (2) Too long LF refining time causes mismatch of 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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