板坯连铸结晶器内钢液表面流速的水模型研究

以承德钢铁厂板坯连铸结晶器为原型,采用1∶1的水模型进行试验,研究了拉速、浸入式水口出口角度、水口浸入深度、水口底面结构及结晶器断面宽度等工艺参数对板坯结晶器内表面流速的影响。结果表明:拉速对表面流速的影响最大,随着拉速的提高,结晶器内钢液表面流速明显增大,当断面宽度为1 650 mm,拉速由0.7 m/min提高到1.4 m/min,表面流速由0.04 m/s提高到0.1 m/s;波浪面结构的浸入式水口表面流速效果最优。

Water Model Experiments on Surface Flow Velocity of Molten Steel in Slab Caster Mold

Based on the slab caster mold of Chenggang company as prototype,the water model with 1∶1 scale was used to study the effect of casting speed,nozzle port angle,immersion depth,bottom structure,mold width and other parameters on the surface flow velocity of liquid steel in slab caster mold.The results show that the effect of casting speed is biggest and with the increase of the casting speed,the surface flow velocity of liquid steel is prominently increased.The casting speed increased from 0.7 m/min to 1.4 m/min when the surface flow velocity increased from 0.04 m/s to 0.1 m/s under the condition of 1 650 mm mold width.And it＇s proved that the nozzle with wave bottom can effetely uniform the velocity of liquid steel surface flow in slab caster mold.