摘要
依据相似原理,建立包钢双流板坯连铸机中间包几何相似比为1∶4的物理模型,采用物理模拟的方法研究控流装置对中间包内钢液流动状态的影响.结果表明,板坯中间包采用优化的控流装置,中间包内钢液的峰值时间和平均停留时间增加,中间包内钢液的死区体积降低,钢液的峰值时间增加比率为240.98％,钢液的平均停留时间增加比率为2.37％,死区体积减少了7.56％,优化了中间包内钢液的流动状态,促进夹杂物在中间包内碰撞、聚集、上浮、去除,保证了钢液的洁净度.
Abstract
The effects of flow control device on flow conditions of molten steel in tundish are studied with the method of physical simulation through establishing physical model of tundish for double-strand slab caster with geometric similarity ratio of 1∶4 based on the similarity principle. The results showed that the peak time and average retention time of molten steel in tundish were increased,volume of dead zone for molten steel in tundish was reduced due to the optimized flow con-trol device was adopted by tundish of slab. The peak time of molten steel is increased by 240.98％,average retention time of molten steel is increased by 2.37％ and volume of dead zone is reduced by 7.56％. As a result,the flow conditions of molten steel in tundish are optimized as well as collision,aggregation,floatation and removal of inclusions in tundish are promoted so that the cleanliness of molten steel is ensured.
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