Continuous casting tundish water port online baking bottom exhaust device and method

Abstract

The invention discloses a continuous casting tundish water port online baking bottom exhaust device and a method, belongs to the technical field of continuous casting tundish water port baking equipment and methods, and is used for online baking continuous casting tundish water ports. The device is characterized in that the upper end of a water port bottom exhaust pipe is connected with a water port lower port; the front end of a gas spraying pipe is fixedly connected to an L-shaped bending place of the water port bottom exhaust pipe; a nozzle direction of the gas spraying pipe is in an outlet direction of the water port bottom exhaust pipe; the back end of the gas spraying pipe is connected with the front end of a wind pressure hose; the back end of the wind pressure hose is connected with a compressed air distributor; and the compressed air distributor is connected with a compressed air pipe. The device adopts a gas spraying drainage technology to perform the water port bottom exhaust drainage by using compressed air, combines the water port bottom exhaust pipe with the gas spraying pipe to replace a high-power exhaust fan and an exhaust pipe, achieves the purposes of improving the bottom exhaust heat utilization efficiency and increasing the water port preheating temperature, and largely reduces the equipment investment and the energy medium cost.

Description

technical field [0001] The invention relates to a continuous casting tundish nozzle online baking bottom exhaust device and method, and belongs to the technical field of continuous casting tundish nozzle baking equipment and methods. Background technique [0002] The tundish refractory material needs to be baked and preheated before continuous casting production. The baking quality of the tundish directly determines the thermal stability of the tundish, which affects the success of the tundish pouring or quick change, and has a great impact on the improvement of the tundish. It plays an important role to cover the number of continuous pouring furnaces, improve the operation rate of continuous casting machine and reduce production cost. At present, Al 2 o 3 -C, it has the characteristics of being easily oxidized at low temperature, especially at 600°C to 800°C. How to prevent the stopper rod and submerged nozzle from oxidation during the tundish baking process and ensure ...

AI Technical Summary

Problems solved by technology

However, due to the long pipes and many bends of the traditional bottom exhaust system, the exhaust flow is only 0.2m 3 ·s -1 After preheating, the temperature of the outer wall of the neck of the nozzle is only 650-750°C, and the nozzle is prone to thermal vibration and fracture during field use, which shows that the preheating temperature of the neck of the nozzle needs to be further increased

At present, the effective way to increase the preheating temperature of the neck of the nozzle is to increase the air flow rate, which is usually achieved by replacing the exhaust fan with a higher power or changing the pipeline to reduce the resistance along the pipeline, but the cost of this method is relatively high , the maintenance workload is large, and there is no better solution other than this, which has become an unsolved problem in the industry so far, and urgently needs to be solved by technicians and workers

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