Converter automatic tapping method and converter system based on converter volume model

Abstract

The invention relates to an automatic tapping method for a converter, comprising: calculating the converter volume model h=P(θ,V), V=Q(θ,h) and θ=R(V,h) according to the converter furnace type parameters; The taphole, the converter tilts and rotates, and the taphole is closed when there is slag flowing out of the taphole, according to the converter tilting angle θ at this time 1 Calculate the initial melt volume V in the furnace 1 =Q(θ 1 ,0); the converter rotates to θ 2 , the θ 2 =R(V 1 , h 0 ), start tapping; according to the real-time molten steel volume V in the ladle 2 Calculation of the melt volume V in the furnace a and the actual liquid level in the furnace h a =P(θ,V a ); Judging the melt level reference threshold h s with h a The relative size between, if h a < h s , the converter continues to tilt, repeating the calculation of h a , until h a = h s , the converter stops rotating; after the tapping is completed, the tapping port is closed. Accordingly, a converter system is provided. The invention can control the height of molten liquid level in the furnace in real time and continuously, and is simple, controllable and reliable in operation. While realizing automatic tapping, it can effectively prevent furnace mouth overflow accidents and greatly shorten the tapping time.

Description

technical field [0001] The invention belongs to the technical field of converter smelting, and in particular relates to a converter automatic tapping method based on a converter volume model and a converter system for realizing the converter automatic tapping method. Background technique [0002] After the converter is smelted, it is necessary to tilt the furnace body through the tilting mechanism, so that the molten steel in the furnace flows out from the tapping hole under the furnace cap to the ladle on the trolley under the furnace. This operation process is called the converter tapping operation. The main requirements for the tapping operation are: (1) slag is not allowed to flow out from the tapping port; (2) slag or molten steel is not allowed to flow out from the furnace port; (3) the tapping time is as short as possible; (4) the console car moves Ensure that the molten steel will all fall into the ladle, that is, the falling point of the steel flow is preferably kep...

AI Technical Summary

Problems solved by technology

There is no scientific basis for manual control of the converter angle. If the manual shaking of the furnace is too fast, the slag or molten steel will easily overflow from the furnace mouth, causing accidents; , the slag floating above the molten steel is drawn into the steel flow and falls into the ladle, which affects the quality of the molten steel, and also causes the flow rate of the steel flow to be too low, resulting in longer tapping time

The position of the manual console car is mainly based on the naked eye observation of the steel flow and the center of the ladle on the trolley. The temperature of the steel flow is high, the radiation is large, the site is dusty, the noise is loud, the manual operation environment is poor, and it is easy to fatigue, which may cause molten steel to spill out of the ladle. accident

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