In a continuous casting device 100 for casting a stainless steel billet 3c, a long nozzle 2 extending into a tundish 101 is provided at a ladle 1. A molten stainless steel 3 is poured through the long nozzle 2 into the tundish 101, and a spout 2a of the long nozzle 2 is immersed into the poured molten stainless steel 3. During pouring, an argon gas 4a is supplied around the molten stainless steel 3 in the tundish 101. Further, continuous casting is performed, in which, while immersing the spout 2a of the long nozzle 2 into the molten stainless steel 3 in the tundish 101, the molten stainless steel 3 is poured from the ladle 1 into the tundish 101 and poured from the tundish 101 into a casting mold 105. During casting, a nitrogen gas 4b is supplied instead of the argon gas 4a around the molten stainless steel 3 inside the tundish 101.

In a continuous casting device 100 for casting a stainless steel billet 3c, a long nozzle 2 extending into a tundish 101 is provided at a ladle 1. A molten stainless steel 3 is poured through the long nozzle 2 into the tundish 101, and a spout 2a of the long nozzle 2 is immersed into the poured molten stainless steel 3. During pouring, an argon gas 4a is supplied around the molten stainless steel 3 in the tundish 101. Further, continuous casting is performed, in which, while immersing the spout 2a of the long nozzle 2 into the molten stainless steel 3 in the tundish 101, the molten stainless steel 3 is poured from the ladle 1 into the tundish 101 and poured from the tundish 101 into a casting mold 105. During casting, a nitrogen gas 4b is supplied instead of the argon gas 4a around the molten stainless steel 3 inside the tundish 101.

For continuously casting an ingot of titanium or titanium alloy, molten titanium or titanium alloy is poured into a top opening of a bottomless mold with a circular cross-sectional shape, the solidified molten metal in the mold is pulled downward from the mold, a plurality of plasma torches disposed on an upper side of molten metal in the mold such that their centers are located directly vertically above the molten metal in the mold, are operated to generate plasma arcs that heat the molten metal in the mold, and the plasma torches are moved in a horizontal direction above a melt surface of the molten metal in the mold, along a trajectory located directly vertically above the molten metal in the mold, while keeping a mutual distance between the respective plasma torches such that the plasma torches do not interfere with each other.

A molten metal processing device including a molten metal containment structure for reception and transport of molten metal along a longitudinal length thereof. The device further includes a cooling unit for the containment structure including a cooling channel for passage of a liquid medium therein, and an ultrasonic probe disposed in relation to the cooling channel such that ultrasonic waves are coupled through the liquid medium in the cooling channel and through the molten metal containment structure into the molten metal.

A tundish including a weir between molten steel pouring portion and molten steel outlet port, the weir including wall portion and hood-shaped portion at upper end of wall portion surrounding molten steel pouring portion from all sides of molten steel pouring portion and extending upward from bottom of tundish, and hood-shaped portion facing molten steel pouring portion and protruding in horizontal direction, wherein weir includes one or more notches continuous from wall portion to hood-shaped portion, and includes refractory bottom surrounded by wall portion and including first porous portion, and also includes first gas inlet pipe connected to first porous portion within weir and within refractory including first porous portion, and tundish further includes bottom refractory provided with second porous portion and with second gas inlet pipe connected to second porous portion, at bottom of tundish between weir and molten steel outlet port.

A rotor for use in the treatment of molten metal. The rotor comprises a roof having a central axis and comprising a plurality of peripheral cut-outs. An intermediate plate extends axially from the roof and comprises a plurality of sides having arcuate portions. A plurality of blades extend axially from the intermediate plate. The rotor is intended for use in casting operations, particularly in the treatment of non-ferrous metals.

A rotor for use in the treatment of molten metal. The rotor comprises a roof having a central axis and comprising a plurality of peripheral cut-outs. An intermediate plate extends axially from the roof and comprises a plurality of sides having arcuate portions. A plurality of blades extend axially from the intermediate plate. The rotor is intended for use in casting operations, particularly in the treatment of non-ferrous metals.