Protecting device for steel ingot pouring and using method of protecting device

Abstract

The invention relates to a protecting device for steel ingot pouring. The protecting device is used in the pouring process of cast steel ingots in the metallurgical industry. The protecting device comprises an air blowing ring, a protection box, a protection box lining and sealing rings, the air blowing ring is fixed to the upper edge of a middle injection pipe, the protection box is fixed to the upper edge of the air blowing ring, the air blowing ring and the middle injection pipe are sealed through the corresponding sealing ring, and the protection box and the air blowing ring are sealed through the corresponding sealing ring. An inner cavity of the air blowing ring is round or ellipse, the outer side of the air blowing ring is connected with an argon guide-in pipe, the inner side of the air blowing ring is evenly provided with cylindrical air outlet holes, and argon can evenly enter space defined by the protection box and the middle injection pipe through the air blowing ring. The lower portion of the interior of the protection box is in a conic barrel shape, the upper portion of the interior of the protection box is in a straight barrel shape, the argon in the cavity can be upwards sprayed out of an upper port of the protection box at a high speed, and therefore air is effectively prevented from entering the middle injection pipe, secondary oxidation of molten steel is avoided, and the steel ingot quality is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an argon protection device for pouring steel ingots and a using method. Background technique [0002] During the pouring process of steel ingot production, the air pressure around the high-speed molten steel flowing out of the ladle nozzle is small, and the air around it will be sucked into the middle injection pipe, and then be drawn into the interior of the molten steel and enter the steel ingot with the stream mold, resulting in severe secondary oxidation of molten steel. [0003] At present, the main structure of the protective pouring device used in the production of steel ingots is to install an argon ring blowing device around the nozzle of the ladle base. The formed argon curtain is easily affected by natural wind, and the protective effect is very unstable. Contents of the invention [0004] The technical problem to be solved by the present invention is to propose...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a protective pouring device for the secondary oxidation problem existing in the current pouring process of steel ingots, so that the molten steel will not undergo secondary oxidation due to air absorption during the pouring process, and improve the quality of steel ingots

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