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为实现高品质低硫、低氧钢的生产,有效降低钢中T.O、S含量,在考虑转炉下渣、炉渣氧化性以及钢水氧活度的条件下,研究确定了用于低硫、低氧钢冶炼的CaO-SiO2-Al2O3精炼渣系,并结合转炉下渣改质技术以及LF精炼钢包渣成分控制技术等工艺措施,制定了低硫、低氧钢的钢包渣改质制度。采用该技术生产的27CrMoNbV等圆管坯钢达到了成品w(T.O)≤15×10-6,w(S)≤0.005%的水平,实现了低硫、低氧钢的生产。
In order to realize the production of high quality, low sulfur and low oxygen steel and effectively reduce the TO and S content in the steel, under the condition of considering the slag, slag oxidation and the oxygen activity of the molten steel in the converter, Steelmaking smelting CaO-SiO2-Al2O3 refining slag system, and combined with the converter slag modification technology and LF refining slag composition control technology and other technical measures to develop a low-sulfur, low-oxygen steel slag reforming system. The 27CrMoNbV and other round billets produced by this technology reach the level of finished product w (T.O) ≤15 × 10-6, w (S) ≤0.005%, and realized the production of low sulfur and low oxygen steel.