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Effect of the wear of supersonic oxygen lance on the stirring characteristics and metallurgical effects in the converter steelmaking process
Ironmaking & Steelmaking ( IF 2.1 ) Pub Date : 2022-07-31 , DOI: 10.1080/03019233.2022.2102334
Ming Lv, Shuangping Chen, Hang Li, Hongmin Guo, Jinke Li, Tao Li

ABSTRACT

Studying the variation in jet characteristics of an oxygen lance nozzle is of great significance for the converter smelting process. A full-size geometric model of a 120-t converter was established and the effects of a worn oxygen lance nozzle exit on the gas jet, stirring characteristics, and molten bath velocity distribution were studied. An increasing wear angle increases the nozzle exit velocity, increases the jet velocity attenuation, decreases the area of the longitudinal high-velocity zone of the molten bath, increases the area of the low-velocity and dead zones, worsens the molten steel flow, and decelerates the reaction rate. Then, industrial tests were conducted using a 120-t converter. When the wear angle increased from 0 to 20°, the phosphorus content, carbon–oxygen equilibrium, and TFe content in the slag increased from 0.029%, 0.0023, and 12.92% to 0.032%, 0.0028, and 14.58%, respectively. This study has important implications for optimizing the oxygen supply in converters.



中文翻译:

超音速氧枪磨损对转炉炼钢搅拌特性及冶金效果的影响

摘要

研究氧枪喷嘴射流特性的变化对转炉冶炼过程具有重要意义。建立了120吨转炉的全尺寸几何模型,研究了磨损的氧枪喷嘴出口对气体射流、搅拌特性和熔池速度分布的影响。磨损角增大,喷嘴出口速度增加,射流速度衰减增加,熔池纵向高速区面积减小,低速区和死区面积增加,钢水流动恶化,减慢反应速度。然后,使用 120 吨转炉进行工业测试。当磨损角从 0°增加到 20°时,渣中的磷含量、碳氧平衡和 TFe 含量从 0.029%、0.0023、分别为 12.92% 至 0.032%、0.0028 和 14.58%。该研究对优化转炉中的氧气供应具有重要意义。

更新日期:2022-07-31
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