Steel ladle circumferential weld type ventilating water feeding opening seat block and argon blowing metallurgy method thereof

Abstract

The invention relates to a steel ladle circumferential weld type ventilating water feeding opening seat block. The steel ladle circumferential weld type ventilating water feeding opening seat block comprises a steel ladle water feeding opening seat block body, circumferential welds, an air chamber box and an air inlet pipe, and a liquid steel hole, a connecting hole and a water feeding opening mounting hole which penetrate up and down are formed in the middle of the steel ladle water feeding opening seat block body. In the casting steel ladle pouring process, argon is blown in all the way, theargon flow is automatically adjusted according to changing of the net weight of steel ladle inner molten steel, the argon penetrates through the circumferential welds to form tiny argon bubbles, mostargon bubbles move upwards to form an annular air curtain screen on the periphery of a steel ladle water feeding opening, air purge is carried out on molten steel about to enter the steel ladle waterfeeding opening, stable and continuous annular air flow is formed in the water feeding opening, accretion of water feeding opening is restrained, and in the steel ladle pouring later period, steel ladle roughing slag caused by flow vortex and current drainage sunken pit is effectively restrained.

Description

technical field [0001] The invention relates to a ladle circular seam type air-permeable upper nozzle block and an argon-blowing metallurgical method, belonging to the technical field of steelmaking process in iron and steel metallurgy. Background technique [0002] The cleanliness and castability of molten steel are the focus and difficulty of steelmaking process control. In continuous casting production, after the slag in the ladle flows into the tundish, it will cause the burning loss of easily oxidized alloy elements such as aluminum and titanium in the molten steel. , and produce alumina inclusions, affecting the cleanliness of molten steel, and easily causing steel surface quality problems. Generally, the ladle slag detection technology is used to reduce the amount of ladle slag, that is, the nozzle is closed and the pouring is stopped when the ladle slag is detected at the later stage of ladle pouring. However, the following problems are found in the actual production...

AI Technical Summary

Problems solved by technology

[0002] The cleanliness and castability of molten steel are the focus and difficulty of steelmaking process control. In continuous casting production, after the slag in the ladle flows into the tundish, it will cause the burning loss of easily oxidized alloy elements such as aluminum and titanium in the molten steel. , and produce alumina inclusions, affecting the cleanliness of molten steel, and easily causing steel surface quality problems

Generally, the ladle slag detection technology is used to reduce the amount of ladle slag, that is, the nozzle is closed and the pouring is stopped when the ladle slag is detected at the later stage of ladle pouring. However, the following problems are found in the actual production process: (1) The remaining amount of molten steel pouring in the ladle (2) Although it can reduce the amount of slag in the ladle to a certain extent, it does not have the metallurgical function of removing inclusions in molten steel and purifying molten steel

This patent has the following deficiencies: there is no air-permeable element in the nozzle seat brick, there is no function of removing inclusions and purifying molten steel, and it cannot suppress the problem of slag rolling at the nozzle of the molten steel tank, resulting in a large surplus of molten steel pouring

This patent has the following disadvantages: the argon bubbles formed by argon passing through the breathable ceramic rod are large and the density is small, and argon is only blown in at the end of ladle pouring, and there is no metallurgical function of blowing argon to remove inclusions throughout the process

The patent has the following deficiencies: the design size of the venting joint is not described in detail, and argon is only blown in at the end of the ladle pouring, and there is no metallurgical function of blowing argon throughout the whole process and promoting the floating and removal of inclusions; Under the reduced conditions, because the argon blowing flow rate is not automatically adjusted linearly, the problem of molten steel slag entrainment caused by blowing the slag surface is caused

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