What are the functions of zirconium based sizing nozzles?

The main function and characteristics of zirconium based sizing nozzles are high fire resistance, good thermal shock performance, corrosion resistance, erosion resistance, small expansion changes, and long service life.

The zirconium based sizing nozzle is made of stable zirconia and natural inclined zirconia stone, which are stabilized by a special process and formed under high pressure and fired at high temperature. The nozzle brand can be set according to different steelmaking environments and usage requirements of users. As one of the refractory materials in the continuous casting process tundish, the zirconium based sizing nozzle is mainly used for small billet continuous casting, which can control the flow of molten steel.

A furnace is a device made of refractory materials and used to calcine materials or products, which is called a furnace. Generally, furnace heating is mainly achieved through electricity, coal, oil, gas, or electromagnetic induction. The heat transfer in the furnace is carried out in three ways: conduction heat transfer, convection heat transfer, and radiation heat transfer. In the low temperature stage, heat exchange is mainly through convective heat transfer, while in the high temperature stage (above 800 ℃), it is mainly through radiation heat transfer. As the temperature increases, the role of radiative heat transfer becomes increasingly significant.

Due to the special performance and high temperature of the furnace, it is required that the structure and insulation of the furnace be well done. With the progress of industries in various countries, furnaces and kilns are also developing towards large-scale and longevity. Gradually, the optimization of furnace structure, the improvement of energy-saving rate, the decrease in energy consumption per unit of production capacity, and the increase in the service life of furnace materials put forward higher requirements for the performance of high-temperature resistant functional coatings. The zirconium based fixed diameter nozzle is made of high corrosion-resistant refractory material, and the diameter of the nozzle remains basically unchanged throughout the entire continuous steel casting process. It is used in the stopper free pouring system of the small billet continuous casting intermediate tank to ensure stable casting speed during the continuous casting process.

The fixed diameter nozzle is made of high corrosion-resistant refractory material, and its diameter remains unchanged throughout the continuous casting process. It has the characteristics of high fire resistance, good thermal shock performance, erosion resistance, corrosion resistance, small diameter change, and long service life. The core of zirconia is mainly made of zirconia as the raw material, which is resistant to high temperature, strong corrosion, no obvious diameter expansion, no deviation, dispersion phenomenon, can withstand rapid cooling and heat, and has no drift tube rupture phenomenon.

Zirconium based fixed diameter nozzles have good erosion resistance, corrosion resistance, good thermal shock stability, no cracking during use, long service life, and a service time of over 20 hours. It has the advantages of low production cost and low price, and the continuous watering time is less than 500min. However, its disadvantage is that zirconium reacts with the steel liquid during use, causing inclusions in the steel liquid, causing zirconium to decompose during use. Zirconia is very small, and multi-component solutions are easily washed away by the steel liquid. Zirconium based sizing nozzles are mainly used for continuous casting of steel billets, which can control the flow of molten steel. The sizing nozzle has good thermal shock resistance and corrosion resistance, ensuring that the molten steel flows evenly and stably into the mold through the zirconium sized nozzle, ensuring the normal operation of the continuous casting process and improving production efficiency. The manufacturer of zirconium based fixed diameter nozzle pointed out that its main processing materials include corundum, zirconia, and graphite. It is mainly used for continuous casting of medium billets, square billets, large billets, and square billets to cast steel. It has good high-temperature wear resistance and can maintain small pore size expansion during the pouring process. The zirconium based sizing nozzle is made of stable zirconia and imported natural oblique zirconia, which is stabilized through special processes, high-pressure forming, and high-temperature firing. It can be set according to different steelmaking environments and requirements of users.