板坯连铸结晶器浸入式水口工艺参数的模拟正交试验

Simulation Orthogonal Test on Process Parameters of Submerged Nozzle in Concasting Mold for Slab

利用流场计算机软件PHOENICS 3.4建立的三维有限差分模型模拟邯钢 16 2 4mm× 2 2 8mm板坯连铸结晶器内钢液的流场和温度场 ,并采用正交试验方法对影响钢液流动的主要因素 :水口浸入深度、倾角、水口内径和侧孔截面积进行研究和分析。结果表明 ,水口浸入深度和倾角对冲击点温度指标和液面卷渣指标影响显著。该板坯连铸结晶器浸入式水口最佳工艺参数为 :浸入深度 12 0mm ,倾角 15° ,内径 6 3 75mm ,侧孔截面积 6 0mm× 6 5mm。

The flow field and temperature field of molten steel in concasting mold for 1 624 mm×228 mm slab at Handan Iron and Steel have been simulated by established a three-dimensional finite difference model using flow field computer software PHOENICS 3.4, and the main factors - immersion depth of nozzle, tilt angle, inside wall diameter of nozzle and sectional area of side hole on molten steel flowing were studied and analyzed. The results showed that the influence of immersion depth of nozzle and tilt angle on temperature index at impact spot and slag curling index was remarkable, and the optimum technology parameters for submerged nozzle in concasting mold for slab were immersion depth 120 mm, tilt angle 15°, inside wall diameter 63.75mm and sectional area of side hole 60 mm×65 mm.