Method and device for automatically controlling argon blowing quantity for steel ladle of continuous casting machine

Abstract

The invention relates to a method and a device for automatically controlling argon blowing quantity for a steel ladle of a continuous casting machine. In the method, by designing an argon blowing curve, argon quantity in the steel ladle can be effectively adjusted based on weight of molten steel in the steel ladle so as to control argon blowing quantity, thus achieving the optimum argon blowing effect. The device comprises an adjusting valve, an argon pipeline, a flow detection device, a pressure detection device and a PLC (programmable logic controller) control system, wherein, the argon pipeline is equipped with the adjusting valve, the flow detection device for gas flow detection and the pressure detection device; and the adjusting valve, the flow detection device and the pressure detection device are respectively connected with the PLC control system. The method and the device have the advantages of improving purity of the molten steel and reducing slag inclusion by a large-ladle argon blowing mode, maintaining even temperature during the casting process of the molten steel in the large ladle, preventing the molten steel from being mixed into a middle ladle owing to eddy effect in the case of low level, enhancing argon blowing effect and reducing temperature loss.

Description

technical field [0001] The invention relates to an automatic control method and device for blowing argon in a molten steel tank of a continuous casting machine. Background technique [0002] In the prior art, the continuous casting machine generally does not blow argon for large ladles during casting, and some use constant flow argon blowing for argon blowing, which is not adjusted based on factors such as the weight of the molten steel tank, the temperature of the tundish, and the ambient temperature. . Since the temperature measurement technology of the tundish is now mature, the temperature of the tundish can be monitored in real time. Therefore, argon blowing of the large ladle is used for real-time adjustment according to the weight, and the controllable adjustment is made according to the temperature of the tundish to effectively reduce the temperature of the molten steel during the casting process. It is very necessary to effectively float inclusions and improve the ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the continuous casting machine generally does not blow argon to large ladles during casting, and some use argon blowing at a constant flow rate, which is not adjusted based on factors such as the weight of the molten steel tank, the temperature of the tundish, and the ambient temperature.

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