1.前言浦项钢铁公司光阳厂的第一炼钢车间的主要产品是铝脱氧镇静钢。去除脱氧产物的操作是进行吹 Ar 和 RH 处理。然而,钢中小于5μm 的 Al_2O_3难以上浮去除。这些细小的Al_2O_3夹杂在连铸过程中可导致中间包水口堵塞,甚至使浇铸中断和产品产生缺陷。因此,浦项公司采用从中间包水口喂CaAl 线的方法来避免中间包水口堵塞和控制夹杂形态。这一工艺在一定程度上控制夹 1. Foreword Pohang Iron and Steel Company Guangyang plant’s first steel plant’s main product is aluminum deoxidation killed steel. Deoxygenation products were removed by Ar and RH blowing. However, Al 2 O 3 less than 5 μm in steel is difficult to remove by floating. Inclusion of these fine Al 2 O 3 during the continuous casting process can lead to blockage of the tundish nozzle, and even the casting breaks and product defects. Therefore, POSCO uses CaAl wires fed from the tundish outlet to avoid clogging of the tundish outlet and control of inclusions. This process controls the clip to some extent