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Study on LF Refining Technique About Ultra Low Sulphur Steel X70 |
SONG Mantang1,2,WANG Huizhong2,WANG Xinhua1 |
1.School of Metallurgical and Ecological Enginery,University of Science and Technology Beijing, Beijing 100083, China;2.Benxi Iron and Steel (Group) Co.,Ltd., Benxi 117021, Liaoning, China |
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Abstract For production of ultra low sulphur (w(S)≤0.0020%)X70, all the procedures from hot metal desulphurization and slag skimming, converter smelting to ladle furnace refining, must be controlled strictly, moreover the LF refining technique is the key factor of deep desulphurization. By controlling basicity, oxygen potential and amount of LF finishing slag, and liquid steel temperature, deoxidation process of X70 with sulphur content, ranged from 0.0004% to 0.0030%, and average of 0.0014%.could be produced.
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Received: 01 January 1900
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