Twin roll continuous caster

Apparatus for casting metal strip comprising:

• a pair of generally horizontal casting rolls forming a nip between them;
• metal delivery means for delivering molten metal into the nip between the casting rolls to form a casting pool of molten metal supported on the rolls;
• means for chilling the casting rolls;
• means for rotating the casting rolls in mutually opposite directions to produce a cast strip delivered downwardly from the nip;
• strip guide means guiding the strip delivered downwardly from the nip through a travelling path which takes it away from the nip towards a coiler;
• a hot rolling mill, disposed along said travelling path to receive the cast strip and to roll that strip in line with the strip caster;
• and an enclosure to confirm the strip throughout said travelling path which enclosure comprises an upstream chamber adapted to enclose the strip from its formation at the nip and one or more other chambers, each chamber having means for providing a controlled atmosphere to control the formation of scale on the strip during operation of the apparatus wherein at least one of the one or more other chambers is provided with quenching means comprising a quenching medium which is liquid at room temperature for quenching the strip passing therethrough, and wherein the rolling mill is disposed between chambers.