Automatic steelmaking method suitable for low-slag smelting

Abstract

The invention relates to an automatic steelmaking method suitable for low-slag smelting, and belongs to the technical field of metallurgy steelmaking. The technical scheme is as follow: slag remaining amount and furnace slag information of a converter are collected, and an early-stage deslagging target of converting heat is determined; a heat converting control mode is determined according to feeding raw material information, the slag remaining amount and the tapping target requirements of the converter; a first-stage system of the converter is controlled to carry out automatic converting, and a one-key type steelmaking of the low-slag smelting process is realized; and online adjustment is carried out on the model calculation module by utilizing a self-learning function of a model, so that the hit rate of a converting endpoint is improved, production cost is reduced, and labor productivity is improved. According to the automatic steelmaking method, the online application can be realized only by relying on an existing sublance system and a computer system, cost is low, maintenance is convenient, and the stability is good; and when the blowing end point C error is within the range of + / - 0.02% and the temperature error is within the range of + / -10 DEG C, the hit rate can reach more than 92%.

Description

technical field [0001] The invention relates to an automatic steelmaking method suitable for smelting with less slag, which realizes automatic steelmaking with less slag by establishing a new model on the basis of the original automatic steelmaking model, and belongs to the technical field of metallurgical steelmaking. Background technique [0002] Slag-less smelting is an advanced steelmaking process that can effectively reduce the consumption of steelmaking raw materials and production costs. The less slag smelting process is to use the principle of recovering the dephosphorization ability of the high-alkalinity final slag of the converter in the early stage of blowing and low temperature conditions, to reuse the final slag, and to carry out the second slagging operation through the slag dumping in the early stage of blowing. Reduce raw material consumption and improve dephosphorization efficiency. The use of automatic steelmaking in the converter can realize the standard...

AI Technical Summary

Problems solved by technology

The automatic steelmaking model is developed for the conventional smelting model. In the calculation of the conventional automatic steelmaking model, the influence of factors such as the amount of slag dumping in the early stage, the amount of slag remaining at the end of blowing, and the composition of slag are not considered, and the control goals in the early stage are not calculated.

After the low-slag smelting process is adopted, the original heat balance and oxygen balance values ​​in the model are no longer applicable, and the deviation between the model calculation and the actual smelting process is large, so that when the low-slag smelting process is adopted, the end carbon and temperature cannot be hit, and the model itself The feedback value is disordered, and the self-learning function of the model is basically lost; the original blowing mode and feeding mode of the model are not suitable for the slag-less smelting process; the automatic steelmaking cannot be realized with the slag-less smelting process

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