Abstract: A method for treating molten iron includes applying a metal treatment agent to molten iron; and stirring the molten iron using a rotary device comprising a rotor head. The rotary device can be resistant to corrosion and thermal shock, and thereby permit efficient application of metal treatment agents.

Abstract: A rotary device and methods for treating molten metal, a tubular sleeve for said rotary device and the use of said rotary device in the treatment of molten metal. The rotary device comprises: a tubular sleeve comprising a rotor head at one end, the rotor head comprising a gas outlet for dispersing gas into molten metal; and a hollow shaft extending inside the tubular sleeve such that at least a portion of the hollow shaft is enclosed by the tubular sleeve, wherein the hollow shaft is fluidly connected to the gas outlet of the rotor head, the tubular sleeve is formed from a refractory material that is resistant to corrosion and thermal shock, and the hollow shaft is formed from a material comprising graphite. A first method comprises: applying a layer of synthetic slag material onto an exposed surface of the molten metal; and stirring the molten metal using a rotary device comprising a rotor head, such that the molten metal flows past the layer of synthetic slag material.

Abstract: Provided is a system for casting molten metals. The system includes a mould comprising a casting cavity having an inlet, and a bore between an upper surface of the mould and the inlet. The system further includes a shroud comprising a funnel and a hollow shaft, wherein the funnel is located outside of the mould, adjacent the upper surface, and the hollow shaft is received within the bore and is moveable therein. A lifting mechanism is located on the upper surface of the mould, the lifting mechanism being operable to lift the funnel of the shroud away from the upper surface for bringing the shroud into engagement with a ladle nozzle. Also provided is a method for casting molten metals using the system.

Abstract: Provided is a system for casting molten metals. The system includes a mould comprising a casting cavity having an inlet, and a bore between an upper surface of the mould and the inlet. The system further includes a shroud comprising a funnel and a hollow shaft, wherein the funnel is located outside of the mould, adjacent the upper surface, and the hollow shaft is received within the bore and is moveable therein. A lifting mechanism is located on the upper surface of the mould, the lifting mechanism being operable to lift the funnel of the shroud away from the upper surface for bringing the shroud into engagement with a ladle nozzle. Also provided is a method for casting molten metals using the system.

Abstract: A mold for casting metal which allows solid impurities to be removed from the molten metal. The mold (50) has a cavity therein, said cavity having a casting portion and contiguous therewith a running system upstream of the casting portion, said running system comprising an upstream inlet portion (58), a downstream outlet portion (60) and a swirl chamber (54) disposed between the inlet and outlet portions (58, 60), wherein a filter (62) is provided at an interface between the swirl chamber (54) and the outlet portion (60). The application also relates to a method for preparing the mold, a pattern for preparing the mold, a housing for use in the mold and a method for casting employing the mold.

Abstract: A mould for casting metal which allows solid impurities to be removed from the molten metal. The mould (50) has a cavity therein, said cavity having a casting portion and contiguous therewith a running system upstream of the casting portion, said running system comprising an upstream inlet portion (58), a downstream outlet portion (60) and a swirl chamber (54) disposed between the inlet and outlet portions (58, 60), wherein a filter (62) is provided at an interface between the swirl chamber (54) and the outlet portion (60). The application also relates to a method for preparing the mould, a pattern for preparing the mould, a housing for use in the mould and a method for casting employing the mould.

Abstract: A mould for casting metal which allows solid impurities to be removed from the molten metal. The mould (50) has a cavity therein, said cavity having a casting portion and contiguous therewith a running system upstream of the casting portion, said running system comprising an upstream inlet portion (58), a downstream outlet portion (60) and a swirl chamber (54) disposed between the inlet and outlet portions (58,60), wherein a filter (62) is provided at an interface between the swirl chamber (54) and the outlet portion (60). The application also relates to a method for preparing the mould, a pattern for preparing the mould, a housing for use in the mould and a method for casting employing the mould.

Abstract: A mould for casting metal which allows solid impurities to be removed from the molten metal. The mould (50) has a cavity therein, said cavity having a casting portion and contiguous therewith a running system upstream of the casting portion, said running system comprising an upstream inlet portion (58), a downstream outlet portion (60) and a swirl chamber (54) disposed between the inlet and outlet portions (58,60), wherein a filter (62) is provided at an interface between the swirl chamber (54) and the outlet portion (60). The application also relates to a method for preparing the mould, a pattern for preparing the mould, a housing for use in the mould and a method for casting employing the mould.