A method for automatic control of argon blowing in continuous casting crystallizer

Abstract

The invention relates to an argon blowing automatic control method of a continuous casting crystallizer. A continuous casting argon blowing system comprises an argon control unit and an argon blowing integration system of the continuous casting crystallizer, wherein the argon control unit comprises a PLC (programmable logic controller) and a communication port, the argon blowing integration system is used for receiving a sending instruction from a continuous casting basic automatic system, the continuous casting basic automatic system is used for sending the information including tundish preheating, continuous casting automatic casting, tundish tonnage, flowing speed, drawing speed and the like, and each argon blowing integration unit is used for uploading the detected actual argon flow rate value, pressure value and back pressure value to the continuous casting basic automatic system through the argon control unit. The method has the advantages that according to the production characteristics of continuous casting, by utilizing the called correlation information of automatic control, argon blowing actual performance and slab production actual performance during the interlocking of argon blowing and continuous casting production links, the particular argon prescription can be automatically called in various continuous casting production links and especially under the non-stable casting state, so the liquid level control stability of the crystallizer is improved, the flowing rate of meniscus of the crystallizer is controlled, the inclusion defect of casting blanks is reduced, and the abnormal expansion is reduced.

Description

Technical field [0001] The invention relates to a continuous casting process, in particular to a continuous casting mold argon blowing automatic control method, which is used for automatic and quantitative control from the continuous casting tundish to the mold pouring channel to ensure argon blowing in each link of continuous casting production It is reasonable to prevent unreasonable argon blowing from causing suction, secondary oxidation of molten steel, channel blockage, abnormal turning of the mold steel surface, etc., and causing slag inclusion or adhesion of the cast slab. Background technique [0002] In the production process of slab continuous casting, the pouring channel from the tundish to the molten steel level of the mold is not filled with molten steel. The function of argon blowing is mainly to fill the gaps in the pouring channel and prevent the negative pressure suction caused by the channel gaps. , To prevent the secondary oxidation of molten steel and the clog...

AI Technical Summary

Problems solved by technology

[0007] Foreign continuous casting mold argon blowing automation control technology pays more attention to the accuracy of measurement. This design is relatively stable in production and has a high degree of automation. With the cooperation of other related technologies such as mold electromagnetic stirring, it adopts small The production line with argon volume control has achieved good practical results; however, under complex production control conditions such as relatively large argon consumption, frequent changes in pouring section, steel type, and pouring speed, this argon blowing control method cannot To meet actual needs, manual intervention is also required

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