Patent ID: 6415849
Filing Date: 2002-07-09
Classification: B22D

Abstract:
A method of preventing contact of oxygen with a metal melt during continuous casting wherein the method is performed using a casting chamber bounded by walls and the casting chamber being disposed above two rolls positioned to form a nip through the which the metal melt from the casting chamber will pass, and the casting chamber being further defined by a hood extending above the casting chamber toward the peripheries of the two rolls upstream of the nip and the hood being sized and shaped to define a gap between the hood and each of the rolls,the method comprising: flowing a metal melt into the casting chamber below the hood; rotating the rolls so that their peripheries form a nip and evacuating a stream of metal melt from the casting chamber through the nip; extracting by suction of air at the peripheries of the rolls at a plurality of extraction stages in a row around the periphery of each roll leading up to the hood and the gap between the hood and the rolls for preventing oxygen from entering the casting chamber through the gap.