Tundish with weirs
AssigneeFoseco Trading A.G.
InventorKenneth Thomas Eccleston
Life of this patent
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Abstract
The invention provides a tundish comprising a casing having a floor, including an impact area, and upstanding sidewalls, the casing having a permanent refractory lining, and at least one expendable beam of refractory heat insulating material extending between opposite sides of the casing adjacent the impact area. Generally the refractory heat insulating material is one comprising a major proportion of particulate refractory, a minor proportion of fibrous material and an organic binder. In the tundish there may be two pairs of said beams to bridge opposite sides of the casing, one pair being located at the sides of the impact area in or on the floor of the casing and the other vertically above the first, adjacent the top of each sidewall.
Claims9
A tundish comprising
- a casing having a floor including an impact area and upstanding sidewalls including two sidewalls at either end of said impact area;
- a permanent refractory lining for said casing;
- a pair of expendable preformed slabs of refractory heat- insulating material disposed on said two sidewalls at either end of said impact area,
- means for providing a weir at said impact area and for supporting said preformed expendable slabs to hold them on said two sidewalls, said means comprising at least one expendable beam of refractory heat insulating material extending between opposite sides of said casing adjacent said impact area and abutting each of said preformed slabs.
A method of continuously casting metal in a tundish including a casing having the walls thereof lined with refractory material and having a floor including an impact area, with a first pair of spaced parallel beams on said floor adjacent said impact area, said method comprising the steps of
- pouring molten metal in a flow between said spaced first pair of beams to impact said impact area,
- continuing pouring of said molten metal in a flow until the level of molten metal in said casing reaches a predetermined vertical level,
- applying insulating powder to the surface of the molten metal in said casing at said predetermined level, and
- preventing the movement of powder into the flow of molten metal into the casing and confining formation of a skull in areas of said molten metal surface not covered by said insulating powder.
Dependencies are inferred from the claim text.