Dynamic regulation method of VOD refined end point carbon content prediction model

A technology of end-point carbon content and prediction model, which is applied in the field of dynamic adjustment of VOD refining prediction model, can solve problems such as difficult to guarantee product quality and smelting cost, and achieve the effects of shortening smelting time, improving control level, and reducing gas consumption

Inactive Publication Date: 2013-07-10
XIDIAN UNIV
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Problems solved by technology

[0005] At present, the VOD production process is basically operated by empirical

Method used

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  • Dynamic regulation method of VOD refined end point carbon content prediction model
  • Dynamic regulation method of VOD refined end point carbon content prediction model
  • Dynamic regulation method of VOD refined end point carbon content prediction model

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[0064] The VOD process flow is as figure 1 As shown, it can be divided into three stages: oxygen blowing decarburization, vacuum decarburization, and feeding reduction. The process flow is: when the ladle containing molten steel and slag dumped is transported to the VOD processing station, the argon valve is opened and argon is blown to the bottom of the ladle. Subsequently, temperature measurement and sampling are performed to obtain the initial data of smelting, and then the vacuum lid is closed to completely seal the vacuum tank. The vacuum pump system starts to work. As the pressure drops, the decarburization process begins. When the vacuum reaches a certain value, the oxygen lance moves to the preset position, and the oxygen blowing process starts. After the oxygen blowing, it is necessary to break the vacuum to conduct a sampling test to obtain the temperature of the molten steel and the content of each main element after the oxygen blowing. After the carbon content o...

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Abstract

The invention belongs to a dynamic regulation method of a VOD refined end point carbon content prediction model, and in particular relates to a dynamic regulation method of a VOD refined end point carbon content prediction model. During the production process of VOD, a steel liquid is respectively subjected to primary sampling after oxygen blowing and reduction, thereby obtaining the actual carbon content. According to the actual sampling value of the carbon content after oxygen blowing, a D value can be calculated and is stored in a database; according to the actual sampling value of the carbon content after reduction, a K value can be obtained and is stored in a database; after the D value and the K value of historic furnace times with a certain amount are accumulated, a primary exponential smoothing algorithm is adopted, and the D and K values adopted for the model are revised; and the revised D and K values replace the D and K in the original model, the oxygen blowing time calculated according to the revised D and K values of the model can be much fit with the actual value, and the prediction accuracy of the model is improved.

Description

technical field [0001] The invention belongs to a dynamic adjustment method of a VOD refining prediction model, in particular to a dynamic adjustment method of a VOD refining end point carbon content prediction model. Background technique [0002] VOD is the abbreviation of Vacuum Oxygen Decarburization, which is a special iron and steel smelting process. It is an out-of-furnace refining process, which was first developed by Edelstahlwerk Witten in 1965, and thus invented the VOD ladle refining furnace. It has many functions such as vacuum degassing, oxygen blowing decarburization, vacuum feeding, argon blowing stirring, non-vacuum temperature measurement and sampling, wire feeding, etc., which effectively ensures that the hydrogen, oxygen, nitrogen, and carbon contents in molten steel reach the lowest level, and It can precisely adjust the composition of molten steel, make the inclusions fully float up and effectively improve the cleanliness of steel, and can refine bearin...

Claims

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Application Information

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IPC IPC(8): C21C7/068
Inventor 李建文马伯渊李锦艳王卫东梁成壮
Owner XIDIAN UNIV
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