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| Model for Ruhrstahl�CHeraeus (RH) decarburization process |
| Dong-ping Zhan1,2 ? Yang-peng Zhang3 ? Zhou-hua Jiang1 ? Hui-shu Zhang4 |
1 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2 Shenyang Northeastern Institute of Metal Materials Co., Ltd., Shenyang 110108, Liaoning, China
3 School of Materials Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China
4 Metallurgical Engineering College, Liaoning Institute of Science and Technology, Benxi 117004, Liaoning, China |
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Abstract A mathematical model was established to predict the carbon content of ultralow carbon steel in the Ruhrstahl�CHeraeus (RH) process. The model was solved using the fourth-order Runge�CKutta method and assumed that the volume of steel partaking in the reaction depends on the decarburization mechanism. After analyzing the decarburization process using the proposed model, the following conclusions were drawn. First, the initial carbon and oxygen contents in the RH degasser should be stabilized in the range of (200�C350) ? 10-6 and (500�C700) ? 10-6, respectively. Second, in the initial stage, the pressure should be reduced as quickly as possible. Third, oxygen blowing should begin as early as possible when the forced decarburization is needed and the minimum oxygen flow rate should be 0.1923 m3/(t min). Finally, expanding the diameter of the snorkel tube from 480 to 600 mm clearly enhances the decarburization rate.
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Received: 06 March 2017
Published: 15 October 2018
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2018, Vol. 25 
