The Zirconia Quick-change Nozzle Has Good Corrosion Resistance And Thermal Stability

The zirconia quick-change nozzle is one of the refractory materials for billet continuous casting, which plays a role in controlling the flow of molten steel. The molten steel flows into the crystallizer evenly and stably through the zirconia quick-change nozzle, which is a necessary condition to ensure the continuous casting. Therefore, the zirconia quick-change nozzle must have good corrosion resistance and thermal stability. During use, no blockage, shedding, cracking and cracking are allowed. Enlarging.

The zirconia quick-change nozzle is one of the refractory materials for billet continuous casting, which plays a role in controlling the flow of molten steel. The molten steel flows into the crystallizer evenly and stably through the zirconia quick-change nozzle, which is a necessary condition to ensure the continuous casting. Therefore, the zirconia quick-change nozzle must have good corrosion resistance and thermal stability. During use, no blockage, shedding, cracking and cracking are allowed. Enlarging. The expansion of the zirconia quick-change nozzle will lead to too much molten steel flowing into the product, and the casting machine is forced to increase the pulling speed and cause a steel leakage accident. The casting machine often stops pouring because the zirconia quick-change nozzle expands, bursts, or falls off.

In the early stage of continuous casting development, the continuous casting time was short. Ordinary zirconium zirconia quick-change nozzles made of zirconia and zirconia can meet the requirements. The content of zirconia is 72%-85%. When the continuous casting time is greater than 500min, the zirconite reacts with certain components of molten steel and decomposes, which leads to the expansion of the zirconia quick-change nozzle. Ordinary zirconium zirconia quick-change nozzle can no longer meet the requirements of use. A zirconia quick-change nozzle made of zirconia with better erosion resistance must be used, with a zirconia content of 93%-95%. The zirconia zirconia quick-change nozzle is resistant to erosion and has good thermal stability, which can realize multi-furnace continuous casting, improve the efficiency of the casting machine, and reduce the production cost.