Method for improving precise control of refining worker over molten steel temperature

Abstract

The invention relates to a method for improving precise control of a refining worker over the molten steel temperature and belongs to the technical field of steel melting control. According to the technical scheme, the method is characterized in that the out-station temperature of LF refined molten steel is automatically calculated through an automatic temperature calculation model; the model is built through the processes that according to the three-stage layers of the steel grade, a continuous casting machine and the continuous casting number, on the basis of an upper limit value and a lowerlimit value of the standard out-station temperature and by combining the process that three sets of parameters of the tundish condition, the residual casting molten steel recycling condition and theto-be-cast time of the molten steel are input by the refining worker according to the actual production condition and converted into variables of the corresponding layers, the upper limit value and the lower limit value of the out-station temperature of the LF refined molten steel are calculated finally; and the refining worker only needs to conduct control operation according to the temperature of the LF refined molten steel automatically calculated in the model. The method for improving precise control of the refining worker over the molten steel temperature has the beneficial effects that areasonable temperature scheme of the refining process is built, and the temperature control level of the refined molten steel is improved, so that the qualification rate of controlling the tundish temperature is increased, the constant casting speed in continuous casting is guaranteed, and the molten steel quality is improved.

Description

technical field [0001] The invention relates to a method for improving the precise temperature control of molten steel by refiners, and belongs to the technical field of steelmaking control. Background technique [0002] The temperature of molten steel is the most important parameter and control factor in the production process of continuous casting, and the level of temperature control is the "barometer" of the smooth operation of the steelmaking plant system. The temperature of molten steel has a great influence on ensuring the continuous casting production process, reducing raw material consumption and energy consumption, and improving the quality of casting slabs. Under the condition that other conditions remain unchanged, the quality of the continuous casting slab and whether the operation is smooth or not depend to a large extent on the temperature of the molten steel in the continuous casting tundish, and the temperature of the molten steel in the tundish is related t...

AI Technical Summary

Problems solved by technology

At present, in actual production, the temperature control of molten steel in refining has the following problems: the baking effect of the ladle and the condition of the ladle are quite different, and the temperature drop of each process fluctuates greatly, which is not conducive to the prediction of the temperature of the molten steel in the ladle and timely measures; the rhythm of the supply of molten steel Unbalanced, resulting in large time-consuming fluctuations in each process, difficult to control accurately, and affecting the effect of temperature control; the process temperature control of different steel types, different ladle types, and different process paths is not scientific

The refiners in the prior art control the temperature of molten steel mainly based on the experience of the refiners. The phenomenon of continuous casting speed reduction at high temperatures often occurs. Smelting high-strength automobile steel sometimes causes continuous casting breakouts due to high temperatures; The accident of stopping pouring has seriously affected the stability of production in the steelmaking area and the stability of product quality

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