三钢100t转炉氧枪的数值模拟优化设计.pdfVIP

第十五届全国炼钢学术会议文集 三钢 100t 转炉氧枪的数值模拟优化设计 卢帝维 朱 荣 （北京科技大学冶金与生态工程学院钢铁冶金系，北京，100083） 黄标彩 张桂林 郑建华 赖浪泉 （福建三明闽光钢铁集团，三明，365000 ） 摘 要：为解决三钢转炉冶炼时出现操作氧压高、化渣困难、喷溅严重等问题，对其转炉氧枪喷头进行了结 构改进优化，并建立起描述该喷头射流特性的数学模型，利用 FLUENT 软件对原喷头和改进后喷头的氧气射 流进行了冷态数值模拟。结果表明：在距喷头相等距离上，改进后喷头的氧气射流速度明显降低，冲击面积 增大。将改进后的喷头用于工业生产，平均供氧时间降低了 46 秒，钢铁料耗减少了 2.8kg/t，终渣碱度也 有所提高。 关键字：转炉炼钢，氧枪喷头，数值模拟 Numerical Simulation and Industrial Application of BOF Lance Nozzle Lu Di-wei1), Zhu Rong1), Huang Biao-cai2), Chen Jian-guo2), Zheng Jian-hua2), Lai Lang-quan2) 1)School of Metallurgy and Ecology Engineering, University of Science and Technology Beijing, Beijing, 100083; 2) Fujian Sanming Minguang Steel group, Sanming, 365000 Abstract: To solve problems such as high oxygen pressure, hard slag smelting and serious splashing, the structure of BOF lance nozzle is optimized and the mathmetical model that describes oxygen jet characteristic is set up. The oxygen jet before and after the optimization is simulated by CFD software FLUENT in normal temperature condition. The result shows that jet velocity is reduced and cross-section area is enlarged after the nozzle optimization. After the improved nozzle is used in industrial production, the average oxygen supply time is reduced by 46 seconds, material consumption is reduced by 2.8kg/t, basicity of final slag is also improved. Key words: BOF steelmaking; lance nozzle; numerical simulation 转炉氧枪是转炉炼钢中的重要供氧设备，高压氧气流通过它喷入转炉熔池，完成脱碳脱磷等去杂质反 应。喷头是氧枪的部件之一，喷头参数的改变直接影响的氧枪的各项性能。某厂转炉冶炼中出现了操作氧 压高（0.95Mpa ）、化渣困难、喷溅严重等问题，经初步分析认为，喷头参数的不合理是导致上述问题的重 要原因。本文使用 FLUENT 软件对改进前后的喷头进行了数值模拟计算和分析，所得结论对改进后喷头的 工业实验