B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 41/00 (2006.01) B22D 11/10 (2006.01)
Patent
CA 2102534
ABSTRACT A tundish has an entry location for receiving a molten alloy, such as steel, and bottom outlet openings for withdrawing the molten alloy. The tundish bottom comprises a sump located downstream of the inlet location and upstream of the outlet openings. Undissolved, molten alloying ingredient, denser than the molten alloy as whole, (e.g. lead or bismuth in the case of molten steel) accumulates in the sump. The sump has a floor and passageways which extend downwardly from the sump floor to a drain in the steel tundish shell underlying the sump. The passageways are permeable to undissolved, molten alloying ingredient but impermeable to the molten alloy. There are expedients for maintaining the passageways at a temperature which prevents undissolved alloying ingredient descending through the passageways from cooling to a temperature at which the undissolved alloying ingredient blocks the passageways against further passage by undissolved, molten alloying ingredient.
Knoepke John R.
Kreevich William J.
Pielet Howard M.
Tindyala Masood A.
Inland Steel Company
Ridout & Maybee Llp
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