Method for controlling process, method for operating blast furnace, method for producing molten iron, and device for controlling process
By using physical models in the blast furnace to predict the iron and iron temperature and iron smelting speed, and calculate the operating volume of coal powder ratio and air supply moisture, the problems of reducing material ratio in the blast furnace and suppressing the temperature deviation of the iron smelting process are solved, and the stability and efficiency of the iron smelting process are improved.
CN119731342APending Publication Date: 2025-03-28JFE STEEL CORP
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Patent Information
- Application Number
- CN202380059848.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-08-31
- Filing Date
- 2023-08-07
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
In blast furnace process, how to reduce the reduction material ratio while suppressing the deviation of the water-molalo temperature, especially when the furnace condition is unstable.
Method used
By predicting the future iron and water temperature and iron smelting speed using physical models, the operating amount of coal powder ratio and air supply water content is calculated to minimize or maximize the evaluation function, and the stability of the iron and water temperature and the reduction of the reduced material ratio are achieved.
Benefits of technology
It is achieved to reduce the reduction material ratio in the blast furnace, while suppressing the deviation of the iron temperature, and improving the stability and efficiency of the iron smelting process.
✦ Generated by Eureka AI based on patent content.
Abstract
Provided are a method for controlling a process, a method for operating a blast furnace, a method for producing molten iron, and a device for controlling a process, whereby the reduction material ratio in a blast furnace is reduced and variation in molten iron temperature is suppressed. This process control method comprises: a response prediction step for obtaining a future molten iron temperature prediction value using a physical model capable of calculating the state of the interior of a blast furnace; and an operation amount determination step in which the deviation between the predicted value and the target value of the molten iron temperature obtained in the response prediction step is obtained, and the operation amount of the pulverized coal ratio and the blowing water content is obtained so that an evaluation function having a term corresponding to the deviation and a term for reducing the reducing material ratio or the blowing water content is minimized or maximized.
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