CONTINUOUS CASTING:
In this process the liquid steel is poured into a double walled bottomless water cooled mould where a solid skin is quickly formed having a thickness of 10 to 25 mm and a semi solid skin emerges from open mould bottom which will be further solidified by water sprays. Molten metal is collected in a ladle and is kept over a refractory lined intermediate pouring vessel called tundish and then poured into water cooled vertical copper mould of 450 to 750 mm long. Before starting casting, a dummy starter bar will be kept at the mould bottom. After starting casting process, as the metal level rises to a height, the starter bar will be withdrawn at equal rate that of the steel pouring rate. Initially metal freezes on to the starter bar as well as periphery of the mould. Solidified shell supports the steel liquid as it moves downwards. The steel shell is mechanically supported by rollers as it moves down through the secondary cooling zone with water.
In this process the liquid steel is poured into a double walled bottomless water cooled mould where a solid skin is quickly formed having a thickness of 10 to 25 mm and a semi solid skin emerges from open mould bottom which will be further solidified by water sprays. Molten metal is collected in a ladle and is kept over a refractory lined intermediate pouring vessel called tundish and then poured into water cooled vertical copper mould of 450 to 750 mm long. Before starting casting, a dummy starter bar will be kept at the mould bottom. After starting casting process, as the metal level rises to a height, the starter bar will be withdrawn at equal rate that of the steel pouring rate. Initially metal freezes on to the starter bar as well as periphery of the mould. Solidified shell supports the steel liquid as it moves downwards. The steel shell is mechanically supported by rollers as it moves down through the secondary cooling zone with water.
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