Abstract: Based on similarity principle, a water model with geometrical-similar ratio 1:7 is established to study circulation flow behavior of liquid in 145 t RH vacuum refining unit. The effect of lifting gas flowrate (60 〜140 m³/h), inserting depth of snorkel (400 ~ 600 mm) and liquid height in vacuum chamber (426 ~526 mm) on circulation flow rate and mixing time of liquid is researched. Results show that with increasing lifting gas flow-rate the circulation flow rate increases in approximate linear relation while the mixing time of liquid decreases in non-linear relation； the more ideal circulation flow rate of liquid is occurred with inserting depth of snorkel 500 mm and liquid height in vacuum chamber 526 mm ； with 130 m³/h lifting gas flow-rate, 600 mm inserting depth of snorkel and 526 mm liquid height in vacuum chamber the optimum liquid circulation flow characteristics are obtained.

摘要： 基于相似原理,建立几何相似比1:7水模型研究了145t RH真空精炼装置内钢液循环流动行为,研究了提升气量(60~140 m³/h) 、浸渍管浸渍深度(400~600 mm) 、真空室液面高度(426~526 mm)对钢水循环流量和混匀时间的影响。结果表明,循环流量随提升气量增加而增大且呈近似线性关系,混匀时间随提升气量增加而呈非线性减小;500 mm的浸渍管浸渍深度和526 mm的真空室液面高度下均出现较理想的循环流量;130 m³/h提升气量、600 mm浸渍管浸渍深度和526 mm真空室液面高度可获得最佳循环流动特性。