INVESTIGATION OF SLAG FORMATION IN TUNDISH OF CONTINUOUS CASTER

Abstract

The investigation of slag formation in tundish of continuous caster for casting melting low-carbon and low-alloy steel weighing 360 tons is exe- cuted. It is found that the casting series of 5 – 10 melts there is a significant increase in weight and the chemical composition of the slag. A key role in this process is the flow of the slag inclusions, pop out of bottled steel. For casting low carbon steel weight surfaced inclusions is about 30 % by weight of the final slag, and the casting alloy steel – about 50 %. A much smaller role in the chemical composition of the slag is dissolved refractory lining: 4 – 5 % by weight of the final slag for chamotte brick lining and 14 – 15 % for magnesia lining. The changes in the chemical composition of the slag raises its melting temperature at 80 – 140 °C.