THE ROLE OF TUNDISH DESIGN ON RESIDENCE TIME DISTRIBUTIONS (RTD) AND SLAG ENTRAINMENT PHENOMENA

摘要

A~ 0.5 scale physical model was fabricated to investigate and improve the performance of a 10 tonne, delta shaped, three strand, and bloom caster tundish. Residence time distribution (RTD) and slag vortexing were studied to predict the performance of the tundish system. It is shown that by incorporating proper flow control devices, such as dam, weir, wedge, baffles with holes, pouring pad, etc., it was possible to (1) 40 % reduction in tundish skull and thereby improve productivity/ yield and (2) produce cleaner steel by ensuring better inclusion flotation and removal.