The erosion phenomenon of the submerged entry nozzle steel

 

The erosion of the submerged entry nozzle by the casting powder is mainly the result of various physical and chemical interactions between the casting powder and the nozzle.

The direct interaction between the casting powder and the nozzle mainly has the following phenomena：

1. When the casting powder has a large erosion and melting rate on the nozzle, and the casting powder component migrates into the nozzle at a low speed, the oxides in the refractory material melt in the casting powder and form on the nozzle wall. The contact layer slag film will reach a saturated state, at this time the dissolution of oxides in the nozzle will be inhibited and the erosion and dissolution of the nozzle by the mold flux will be reduced.
2. When the erosion and melting rate of the casting mold powder to the nozzle is very small, the mold powder will intrude into the nozzle along the pores of the nozzle itself and the channel formed by the oxidation of carbon in the nozzle , and combine with the nozzle. A complex chemical reaction occurs, and at the same time it will increase the total amount of liquid phase inside the nozzle.
3. The erosion and dissolution of oxides in the immersion nozzle by continuous casting mold powder can be regarded as two parts. If the chemical reaction rate at the interface is the smallest, it means that the chemical reaction at the interface is the limiting link at this time. If the diffusion is at the slowest time, it means that the diffusion is a restrictive link at this time. Temperature has an impact on chemical reaction and diffusion. The rate of chemical reaction is greatly affected by temperature. The rate of relative motion has a greater impact on the rate of diffusion, while the effect of temperature on diffusion is relatively small.

Therefore, in the process of various complex chemical reactions between the mold flux and the submerged entry nozzle steel, there is a continuous renewal and migration process of each component at the same time.

Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc.

Article Source:The erosion phenomenon of the submerged entry nozzle steel

Company name ：Luoyang Wanhao New Material Co., Ltd.

More Refractory Products: http://www.wanhaorefractory.com/en/product.html

Website: http://www.wanhaorefractory.com/

submerged entry nozzle steel

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