Qu'est-ce que la buse d'entrée immergée en coulée continue?

The nozzle is an important passage connecting the tundish and the crystallizer. It is called the chokepoint of continuous casting. It has the function of connecting the previous and the following and is an important link in the clean steel smelting process. The outlet of the continuous casting submerged entry nozzle is immersed in the molten steel in the crystallizer, which prevents secondary oxidation of the molten steel, controls the flow rate of the molten steel when it enters the crystallizer, is conducive to the floating of inclusions in the molten steel, and can effectively prevent the entanglement. The occurrence of slag phenomenon, etc., ensures the stable operation of the continuous casting process.

Performance of continuous casting submerged entry nozzle

(1) Good thermal shock stability
(2) Strong resistance to erosion by molten steel and molten slag
(3) It is not easy to react with inclusions in molten steel to avoid nodules and blockage at the nozzle.

What materials are submerged entry nozzle made of?

The material and structure of the submerged entry nozzle have a great influence on the flow of molten steel in the mold and tundish, which is directly related to the quality of steel products. Different smelting methods have different immersion nozzle materials. Currently, the main nozzle materials are fused quartz, aluminum zirconium carbon, aluminum carbon, etc.. Depending on the type of casting billet, the structure of the submerged entry nozzle used is also different. The straight-cylindrical submerged entry nozzle is mainly used for pouring billets, rectangular billets or small slabs, and the double-side hole type immersed nozzle is mainly used for pouring blooms. , slab, while the upward side hole type submerged entry nozzle is mainly used in the stainless steel pouring process.

What will happen with the continuous casting submerged entry nozzle?

With the development of new refractory materials, the service life of the immersed nozzle has been significantly increased. Cependant, nodules and clogging of the nozzle will occasionally occur during the continuous casting process. Nodulation and blockage of the nozzle not only affect the smooth progress of the continuous casting process, but also affect the smooth progress of the continuous casting process. Seriously affects the quality of the slab.