Continuous casting process of metal
AssigneeArcelormittal Investigacion Y Desarrollo, S.L.
InventorsMathieu Brandt, Jean-Paul Fischbach, Paul Naveau
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Abstract
A continuous casting process of a steel semi-product is provided. The process includes a step of casting using a hollow jet nozzle located between a tundish and a continuous casting mould. The nozzle includes, in its upper part, a dome for deflecting the liquid metal arriving at the inlet of the nozzle towards the internal wall of the nozzle, defining an internal volume with no liquid metal. A simultaneous step of injecting powder through a hole of the dome occurs. The powder has a particle size of 200 μm or less. The dome includes a first device to inject the powder without any contact with the dome and a second device to avoid sticking or sintering of the powder onto the first device.
Claims11
A continuous casting process of a steel semi-product comprising:
- casting, using a hollow jet nozzle located between a tundish and a continuous casting mould, the nozzle including, in an upper part, a dome for deflecting liquid metal arriving at an inlet of the nozzle towards an internal wall of the nozzle, thereby defining an internal volume with no liquid metal;
- and
- injecting, simultaneously, powder through a hole of the dome, the powder having a particle size of 200 μm or less, the dome including a first device to inject the powder without any contact with the dome, the first device including a hollow body passing through the hole of the dome, said hollow body having a double wall,
- circulating a cooling gas inside the double wall via an inlet on an end of the double wall during the injecting,
- exhausting the cooling gas from the double wall via an outlet on said end of the double wall, during the injecting.
Dependencies are inferred from the claim text.