共查询到18条相似文献,搜索用时 125 毫秒
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以相似原理为基础,通过建立几何相似比0.28:1的水模型对两流230 mm×1300 mm板坯连铸63.27t中间包流场进行模拟实验,研究通道式过滤器对中间包钢液流动状态的影响。结果表明,单纯的湍流控制器+挡墙、挡坝,中间包活塞区体积偏小,死区体积偏大;用钢液过滤器代替挡坝后优化效果明显,且安装简单,成本低,优化后的中间包钢液平均停留时间由348.22 s延长至400.15 s,峰值时间由原来的172.4 s延长至196.0 s,死区体积由22.49%减小至9.69%。 相似文献
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依据河钢集团唐钢新区72 t中间包建立三维数值模型,讨论对比了不同中间包结构包括湍流抑制器、挡墙和挡坝对钢液液位波动、速度分布、停留时间以及夹杂物上浮去除的影响。钢液湍流运动通过求解Realizable k-ε模型实现,钢液停留时间通过求解浓度标量方程(User-Defined Scalar, UDS)实现,夹杂物上浮去除则通过求解离散相模型(Discrete Phase Model, DPM)得到。结果表明,带檐湍流抑制器和开口湍流抑制器下中间包上水口附近的液面波动较大,是不设置湍流抑制器的情况的3~4倍;而带挡板湍流抑制器下钢液在挡板之间形成循环流动,液位波动较小,甚至小于无湍流抑制器的情况;中间包内挡墙和挡坝同时存在时增加了钢液在中间包的移动距离,有利于夹杂物的上浮去除;在目前条件下,挡墙和挡坝分别距离中间包宽度中心1 060 mm和2 000 mm时钢液平均停留时间较长以及夹杂物上浮去除率较高。 相似文献
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Xue‐min Yang Song‐xia Liu Jin‐sha Jiao Meng Zhang Jian‐ping Duan Liang Li Cheng‐zhi Liu 《国际钢铁研究》2012,83(3):269-287
In order to obtain the optimal structural parameters of the dug arch or round hole(s) at dam bottom in an 18–20 tons asymmetrical T‐type single‐strand continuous casting tundish, the flow field profiles and temperature profiles of molten stainless steel in the tundish with arch or round hole(s) at dam bottom have been investigated using hydrodynamic modeling coupled with mathematical simulation. The optimal structural parameters of arch hole(s) at dam bottom can be obtained from hydrodynamic modeling as that two arch holes with 30 mm as height and 50 mm as radius are symmetrically dug at dam bottom with the distance between arch hole center and dam center as 205 mm; or the optimal structural parameters of round hole(s) can be recommended as that one round hole with 70 mm as diameter is dug at left of the dam bottom with the distance between hole center and dam center as 205 mm. The results of mathematical simulation suggest that digging arch or round hole(s) at dam bottom with above‐mentioned structural parameters cannot obviously induce negative effects on streamlines and velocity vector profiles of molten stainless steel in the tundish by short circuit flow via arch or round hole(s) at dam bottom. The calculated temperature drop of molten stainless steel between the submerged ladle shroud and submerged entry nozzle in the tundish with arch or round hole(s) at dam bottom is about 3.0 K, the maximum temperature drop of molten stainless steel in the tundish is about 6.0 K. 相似文献
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总结了中间包结构的发展趋势及在工厂试验分析的容量、熔池深度、挡墙、坝和过滤器等流动控制装置对钢水清洁度的影响;计算了使用不同流动控制装置条件下中间包钢液流场的变化。 相似文献