【摘要】 梅山钢铁公司炼钢厂有 2座 15 0t的LD转炉 ,配 40t板坯连铸中间包 .为了了解和掌握中间包内部过程的基本特征 ,在实际中间包内对流动控制装置、钢水停留时间分布及熔池内温度分布情况进行了现场测试 ,并结合数学和物理模拟方法进行分析 .研究结果表明 :钢包与中间包内钢水的温差对中间包内钢水的流动状态有很大影响 ,进而影响着中间包内许多冶金过程 ;实际中间包熔池内温度分布不均 ,即使没有任何流动控制装置 ,熔池内上部温度也高于下部温度 ,现场测定的停留时间曲线与传统的等温水模型实验结果相差较大 ;在大多数生产条件下 ,中间包内的流动是非等温流动 ,以等温条件为前提的挡板设计、控制参数可能与实际情况不符 ,应该重新鉴别更多还原

【Abstract】 A 2×150 t LD converter steel plant equipped with 40 t slab continuous casting tundish has been put into operation in Meishan Iron and Steel Cooperation. To understand the basic process property in the tundish, an industrial test on flow control, residence time distribution and steel temperature distribution in the bath, combined with a physico-mathematical simulation has been carried out. The results show that the temperature difference of steel between ladle and tundish significantly influences the flow property and sequentially many metallurgical processes in the tundish. In practice, molten steel temperature in tundish bath is heterogeneous, and even without any flow control equipment, temperature on the top can be higher than that at the bottom. It is well known that residence time distribution obtained by industrical measurement is very different from that obtained by experiment with conventional isothermal water model. It is suggested that the basic property of tundish flow should be considered as a non-isothermal flow in most production conditions.更多还原