双底吹对CAS钢包弱搅拌区混匀效果的改善  

Improvement on the Mixing Effect in Low-intensity Stirring Area for CAS Ladle by Double-nozzles Bottom Blowing Technology

作　　者：周萌[1] 何平[1] 

机构地区：[1]钢铁研究总院冶金工艺所,北京100081

出　　处：《钢铁钒钛》2011年第1期34-40,共7页Iron Steel Vanadium Titanium

摘　　要：按照1∶5相似比建立CAS钢包模型,通过片光源拍照观察流场和电导率仪测定混匀时间,研究双底吹技术对CAS钢包内弱搅拌区混匀特性的改善情况。结果表明双底吹技术能较大程度降低钢包混匀时间,改善弱搅拌区的流场特点,提高钢包中下部的混匀效果。通过无因次分析,得出辅吹气流量Q和浸罩插入深度H对混匀时间影响程度的经验公式:(τ-τ0)/τ0=0.59Q(-0.74)(H/HL)(0.52)。Based on a water model with the size of one fifth of the real CAS ladle,the improvement of the mixing effect in CAS-OB process using double-nozzles bottom blowing technology was researched by analyzing the flow field and determining the mixing time.Results show that double-nozzles bottom blowing technology could greatly reduce the mixing time,also could change the flow field in the low-intensity stirring area of ladle and improve the mixing effect in the middle and lower part of ladle.The experimental formula for expressing the effect of bottom blowing flow rate Q and depth of inserting snorkel H on mixing time （τ-τ0）/τ0=0.59Q（-0.74）（H/HL）（0.52） is obtained by free factors analysis.

关 键 词：CAS-OB 双底吹 流场 精炼 冷态模拟 

分 类 号：TF769.2[冶金工程—钢铁冶金]