Development of the centrifugal flow tundish for separation of inclusions from molten steel in continuous casting

Y. Miki¹ - T. Fujii¹ - H. Kitaoka² - S. Saito³ - K. Komamura³

¹ Iron & Steel Research Laboratories, Kawasaki Steel Corporation, Japan
² Daiwa Steel Corporation, Japan
³ Chiba Works, Kawasaki Steel Corporation, Japan

Abstract
A new process was devised for promoting inclusion separation in the tundish. The process utilizes electromagnetic force to rotate molten steel in a cylindrical tundish. The centrifugal force caused by the rotational flow promotes to separation of inclusions from the molten steel. This tundish is referred to as the Centrifugal Flow Tundish (CF tundish). An experimental model was constructed to clarify the mechanism separating inclusions from molten steel strongly stirred with a rotating electromagnetic field. In this experiment, molten steel was rotated and solidified in a crucible. Following the model studies, pilot scale tests were carried out using a tundish of 600 kg capacity and 5 ton molten steel to know the effect of rotational flow. Table 1, Figs 8, Refs 3.