Rational argon stirring for a 150-t ladle furnace |
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Authors: | Hai-yan Tang Jing-she Li Shu-feng Yang De-song Wen |
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Institution: | a School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China b Steelmaking Plant of Tianjin Pipe Corporation Ltd., Tianjin 300301, China |
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Abstract: | Based on the principle of similarity, water modeling experiments were carried out for a 150-t ladle furnace. The rational parameters of argon stirring were determined as the optimized positions of nozzles, top area of the porous brick, and gas flow rate. The following results are obtained: 1) the optimized positions of two nozzles are at 0.333R (R refers to the radius of the ladle at bottom) with an angle of 135°; 2) the top diameter of the porous brick should be 130 mm; 3) the flow rate of gas should be 25.0-30.6 m3/h. The plant trial shows that the improved process is effective in enhancing the cleanliness of round billets. The total oxygen content, microinclusions, and macroinclusions in round billets are reduced by 12.5%, 8.2%, and 20%, respectively. |
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Keywords: | ladle furnace argon stirring refining inclusions |
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