Ridged tundish stopper
AssigneeVesuvius Group, S.A.
InventorsMartin Kreierhoff, Johan Richaud, Marcel Rave
Life of this patent
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Abstract
A stopper (1) is provided that includes ridges (12) in contact with the slag in a tundish (60). Each ridge (12) has a radial extension (21) that is less than half a radius (20) of the stopper (1) measured at the ridge (12). The ridges (12) rise and drop around the stopper (1). The ridges (12) decrease the creation of vortices by the stopper (1) and increase thus its lifetime.
Claims15
A stopper (1) for controlling the flow of liquid metal (65) out of a tundish (60), the stopper extending in an axial direction (101) between an upper end (91) and a lower end (92) and being radially limited by a lateral wall (10) comprising a plurality of ridges (12),
- wherein the ridges (12) extend at least partially along a circumferential direction (103) on the lateral wall (10),
- wherein at least two of the ridges (12) are separated along the axial direction (101) by a gap (19),
- wherein each ridge (12) has a radial extension (21) being at least 0.01 times the radius (20) of the stopper (1) taken at said ridge (12),
- wherein each ridge (12) has an axial extension (41) being at least 0.01 times the diameter (22) of the stopper (1) at the uppermost ridge (121),
- characterized in that each ridge (12) has a radial extension (21) that is less than half a radius (20) of the stopper (1) taken at said ridge (12),
- at least one part of a least one of the ridges (12) rises with the circumferential direction (103) and at least one part of a least another one of the ridges (12) drops with the circumferential direction (103), and
- each ridge (12) extends between one or more upper points (31) located closest to the upper end (91) and a corresponding number of one or more lower points (32) located closest to the lower end (92).
Dependencies are inferred from the claim text.