单嘴精炼炉真空处理过程气泡行为及冶金效果研究  

A Study on Bubble Behavior during Vacuum Treatment of Refining Furnace with Single Snorkel and Metallurgical Effect

作　　者：秦哲[1] 朱梅婷[1] 成国光[1] 张鉴[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《特殊钢》2010年第5期18-21,共4页Special Steel

摘　　要：根据相似理论,以钢厂80 t单嘴精炼炉1:4的水模型模拟了单嘴精炼炉内气泡行为,分析了吹气流量(2～10 L/min)、吹气塞直径(15～30 mm)对气泡行为、混匀时间的影响。水模拟结果表明,随吹气流量增加,混匀时间减少,但吹气流量≥6 L/min,混匀时间没有显著变化;在相同吹气量下,吹气塞直径增加,混匀时间减少。实验研究基础上,在80 t单嘴精炼炉上进行了超低碳钢的生产试验,结果表明单嘴精炼炉在18 min脱碳时间内,钢中碳含量可降到10×10(-6);脱硫剂消耗4 kg/t的情况下,成品钢中S含量为(20～30)×10^(-6),脱硫率平均达49%;吹氩强度平均为4 L/(t·min),是相同吨位RH的25%。According to similarity theory, the bubble behavior in single snorkel refining furnace has simulated by u- sing a scale 1 ： 4 water model for an 80 t single snorkel refining furnace at steel works, and the effect of gas blowing rate （2 - 10 L/min） and plug diameter （15 - 30 mm） on bubble behavior and mixing time is analyzed. Water simulation results show that with increasing gas blowing rate the mixing time decreases, but as gas blowing rate ≥6 L/min, the mixing time has no obvious change; at equal gas blowing rate, with increasing plug diameter the mixing time decreases. Based on water model experimental study, the pilot production of ultra-low carbon steel by an 80 t single snorkel refining furnace has been carried out. Results show that within decarburization time for 18 min in single snorkel refining furnace the carbon content in steel may decrease to 10 × 10^ -6 ; at the condition of using 4 kg/t desulphurizing agent the sulphur content in finished steel is （20 - 30） × 10 ^-6 and the average desulphurizing rate is 49% ; the average argon blowing intensity is 4 L/（ t · min） of a single snorkel refining furnace, it is 25% that of a RH unit with same capacity.

关 键 词：单嘴精炼炉 水模型 气泡行为 冶金效果 

分 类 号：TF769[冶金工程—钢铁冶金]