Ladle refining auxiliary argon blowing apparatus

Abstract

The invention relates to an auxiliary argon blowing apparatus, and concretely relates to a ladle refining auxiliary argon blowing apparatus. The apparatus comprises a metal gas tube A (1), a steel sleeve (2), a metal cover plate A (4), metal tubes (13), air bricks (6), a refractory castable (7) and metal gas tubes B (11), the upper portion in the refractory castable is provided with the metal tubes, the lower portion in the refractory castable is provided with the air bricks, the metal tubes are connected with the air bricks through the metal gas tubes B, the steel sleeve A is coated on the upper end surface and the upper portion outer rim surface of the refractory castable, the upper portion of the steel sleeve A is provide with the metal cover plate A, the upper portion of the metal cover plate A is provided with the metal gas tubes A respectively connected with the metal tubes, and a gas chamber A (5) is arranged between the metal cover plate A and the steel sleeve A. The apparatus effectively avoids the influence on the production efficiency of a steel factory or production cost increased due to reladling or molten steel degrading treatment caused by poor permeability of the air bricks of ladles.

Description

technical field [0001] The invention relates to an auxiliary argon blowing device, in particular to an auxiliary argon blowing device for ladle refining. Background technique [0002] It is known that in the iron and steel metallurgy industry, after the molten steel enters the ladle, argon gas is blown into the molten steel to achieve the purpose of stirring the molten steel, which can uniform the temperature and chemical composition of the molten steel, promote the removal of inclusions or control the inclusions It is a technology commonly used in the modern metallurgical industry. [0003] Installing breathable bricks at the bottom of the ladle can achieve the purpose of stirring molten steel. It has the advantages of good mixing effect, simple operation, and low cost. Therefore, breathable bricks have become an indispensable functional breathable element in the modern metallurgical industry. Breathable bricks are used during use. To withstand the continuous impact of hig...

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Problems solved by technology

[0003] Installing breathable bricks at the bottom of the ladle can achieve the purpose of stirring molten steel. It has the advantages of good mixing effect, simple operation, and low cost. Therefore, breathable bricks have become an indispensable functional breathable element in the modern metallurgical industry. Breathable bricks are used during use. To withstand the continuous impact of high-temperature molten steel and the erosion of molten slag, as well as the thermal shock of alternating hot and cold temperatures, the conditions of use are extremely harsh; Problems will not only affect the production rhythm of steel mills or the quality of steel products, but also cause the ladle to go off the assembly line ahead of time, reducing the service life of the ladle

[0004] When the ladle enters the refining station, if the ventilation bricks have poor ventilation, most steel mills generally have the following operation methods at present: (1) Steel mills generally carry out repacking treatment, which will affect the production rhythm on site; during the repacking process, it will also reduce The temperature of molten steel; at the same time, during the process of pouring, there will be a large amount of molten steel splashing, which may cause some unsafe factors; (2) increase the pressure of the bottom blowing of the breathable brick, continue refining, and measure the composition of molten steel many times. After a long period of refining, it will not only consume a lot of electric energy and alloys, but also make the ladle wall bricks, slag line bricks, etc. contact with molten steel for a long time, which will greatly affect the service life of the ladle; if the molten steel still does not meet the requirements, The steel needs to be downgraded, resulting in a large cost loss

[0005] When the service life of the permeable brick is short, the risk of steel breakout of the permeable brick will be increased, and the use of the ladle can only be stopped, which will cause a large waste of refractory materials in other parts of the ladle, reduce the service life of the ladle, and increase the cost of steelmaking Therefore, it has become a basic demand of those skilled in the art to propose a ladle refining auxiliary argon blowing device that can prevent back-lapping, increase the service life of the ladle and improve the quality of molten steel.

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