This product is made of high-purity raw materials, formed by vibration casting, and baked at low temperature. It has the advantages of high thermal strength, thermal shock resistance, corrosion resistance and erosion resistance, and hot repair. used by other units.
　　Ladle breathable brickIt is the most critical functional refractory material in the bottom-blowing argon process, and its use conditions are very harsh, mainly manifested in the high concentration of thermal stress, repeated rapid cooling and rapid heating of the working face, corrosion and penetration of molten steel and slag, and pouring in the ladle. When steel and argon are used to stir molten steel, the permeable brick is strongly scoured, sheared and worn by high temperature molten steel.
Ladle breathable bricks are divided into two types: built-in integral breathable bricks and externally installed breathable bricks according to the assembly method. Regarding the research on breathable bricks, people generally pay attention to the resistance to melting loss of core bricks, resistance to penetration of molten steel, blow-through rate and other issues. The performance of the matching seat brick is relatively less considered. The author believes that to improve the service life of the breathable brick, improve its safety factor, and ensure that there is no steel leakage or steel leakage accident, whether it is an externally-installed breathable brick or an internal-installed breathable brick , The research on the ventilation bricks is equally important, especially the external ventilation bricks have higher requirements for the seat bricks.
In the modern metallurgical process, the use of gas blowing molten steel starts from the smelting process and ends in the mold. The breathable brick for ladle is an important functional element in this link. The main properties of the breathable brick for ladle should have It can be summarized in the following aspects:
(1) High temperature corrosion resistance
The refining ladle is very strict in terms of temperature and time, and the highest temperature often reaches above 1750 degrees Celsius. During the refining operation, the basicity of the slag has a great influence on the life of the refractory material. The basicity of the ladle refining slag is about 0 . 6 - 0.4, so the refractory material is eroded by acidic slag and alkaline slag with strong permeability at high temperature, and the damage rate is fast.
(2) High temperature wear resistance
Various ladle refining methods have adopted forced stirring, which is very serious for high temperature wear of the bricks.
(3) Peeling resistance
Due to the intermittent operation, the temperature changes greatly, it is easy to produce thermal spalling and structural spalling, and the use conditions are very harsh. There is a large gap between the performance of the currently used ladle permeable bricks and the performance they should have. In terms of high temperature erosion resistance and spalling resistance, especially spalling resistance needs to be improved.

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