Converter steelmaking endpoint carbon content and temperature control method

Abstract

The invention provides a converter steelmaking endpoint carbon content, a temperature control method and equipment. The method comprises the following steps that: a first detection point of a sublanceis taken as a demarcation point, and a converter steelmaking process is divided into a first stage and a second stage; in the first stage, according to characteristic parameters of an initial state of molten iron and smelting requirements of a target steel, an endpoint carbon content and a temperature are controlled based on an oxygen blowing prediction model and an endpoint carbon content prediction model; in this way, the shortcoming of insufficient precision due to artificial experience prediction is overcome, at the same time, influence of uncertain factors such as molten steel splash andlate decarburization reaction deviation is considered; if carbon content and the temperature of the first detection point of the sublance do not meet tapping requirements when the first stage is completed, the second stage is performed until the carbon content and the temperature meet the tapping requirements, and therefore precision of smelting control is improved; in addition, the endpoint carbon content prediction model has more tapping cycles for training samples, and parameters for training neural networks are complex, and obtained neural network error is small.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a method for controlling carbon content and temperature at the end point of converter steelmaking. Background technique [0002] The iron and steel industry is a basic raw material industry and a pillar industry of the national economy. Converter steelmaking is the most important steelmaking method in the world. At present, 60% of the world's steel and 90% of my country's steel are smelted by converters. In the past ten years, the scale of converter steelmaking has expanded rapidly, the output has continued to increase, and the technology has been continuously updated. The blast furnace-hot metal pretreatment-oxygen converter-external refining-continuous casting and rolling process with the converter as the core has undergone optimized combination and structural adjustment. , has become a model commonly used by modern large-scale iron and steel plants, with functions suc...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the shortcomings of low precision, large errors or poor versatility in the control models used at the end of the converter, on the one hand, the present invention provides a carbon content and temperature control method at the end of converter steelmaking, including: The characteristic parameters of the initial state of molten iron and the requirements of the smelting target steel are based on the carbon content and temperature control model of the end point of converter smelting to control the end carbon content and temperature; the carbon content and temperature control model of the end point of converter smelting is the first detection point is the demarcation point, divided into the first stage and the second stage; the first stage includes the prediction model of the oxygen blowing amount and the carbon content prediction model of the end point, and the second stage includes the logic control of the carbon content or the PID control of the temperature

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