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Method for on-line prediction of total decarbonization amount of molten steel in circulating vacuum degassing method

A technology of vacuum degassing and vacuum degassing device is applied in the production control field of metallurgical refining, which can solve the problem of high cost and achieve the effect of low cost and flexible precision

Inactive Publication Date: 2014-04-02
PANGANG GROUP RESEARCH INSTITUTE CO LTD +1
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Problems solved by technology

However, this dynamic decarburization model requires the installation of a mass spectrometer in the RH exhaust system, and the online continuous detection of CO and CO in the exhaust by the mass spectrometer. 2 etc., and real-time monitoring of changes in vacuum degree and gas flow rate is required for calculation. During the process, multiple samples are taken to test the carbon content. The cost is very high, and many domestic steel mills cannot meet such conditions.

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  • Method for on-line prediction of total decarbonization amount of molten steel in circulating vacuum degassing method
  • Method for on-line prediction of total decarbonization amount of molten steel in circulating vacuum degassing method
  • Method for on-line prediction of total decarbonization amount of molten steel in circulating vacuum degassing method

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Embodiment Construction

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0015] The technical concept of the present invention is: according to the steel conditions and target requirements, combined with the characteristics of the RH top gun, starting from the metallurgical carbon-oxygen balance principle, according to the initial carbon content of molten steel, oxygen content, molten steel temperature, vacuum degree and other information, carry out molten steel The online real-time calculation of the total decarbonization amount can achieve the effect required by the user. In the decarburization process, the main reaction positions are different in different stages of the vacuum decarburization process, and the contribution rate of each reaction position to the total decarburization rate is different. Adjust the primary and secondary of the reaction position according to the actual situation, and can simulate the cont...

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Abstract

The invention provides a method for on-line prediction of total decarbonization amount of molten steel in a circulating vacuum degassing method. The method comprises steps of: dividing a decarbonization process in a circulating vacuum degassing device into a high-speed reaction stage, a forced decarbonization stage and low-concentration reaction stage; segmenting the decarbonization positions in the circulating vacuum degassing device; and calculating a sum of the respective decarburization amount of the decarbonization positions corresponding to the high-speed reaction stage, the forced decarbonization stage and the low-concentration reaction stage, so as to obtain the total decarbonization amount of the molten steel. The method provided by the invention has the advantages of capability to carry out real-time detection on the total decarbonization amount of the molten steel in an RH process, flexible operation, high precision and low cost.

Description

technical field [0001] The invention relates to the technical field of production control of metallurgical refining, and more specifically, relates to a method for online prediction of the decarburization amount of molten steel in a cycle vacuum degassing process. Background technique [0002] Vacuum decarburization by cyclic vacuum degassing method (i.e., RH method) plays a key role in the production of ultra-low carbon steel, but the online control technology of RH decarburization cannot improve the accuracy due to the inability to monitor the carbon and oxygen content in real time; the current Most of the RH decarburization control models are static models, which cannot accurately simulate the actual state of the decarburization process in the RH vacuum device. (1): 126~135.Yamaguchi K.et al), ignoring the decarburization of the bubbles in the riser and the decarburization of the droplets in the vacuum chamber; the literature "Dynamic Modeling and Control of Vacuum Circul...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/10C21C7/068
Inventor 朱苗勇陈永祭程曾建华孙建立孙维松陈亮张敏
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD