Tundish for molten alloy containing dense, undissolved alloying

Details Tundish for molten alloy containing dense, undissolved alloying Tundish for molten alloy containing dense, undissolved alloying

1993-11-10

1994-08-16

Kastler, Scott

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By separating metal in a molten mass from undesired...

266275, 164437, B22D 3700

Patent

active

053380096

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.

REFERENCES:
patent: 4671499 (1987-06-01), Ishiyama et al.
patent: 4770395 (1988-09-01), Vo Thanh et al.
patent: 4852632 (1989-08-01), Jackson et al.
patent: 4942986 (1990-07-01), Lewis et al.
Howard M. Pielet, "Lead Drain Trials", Jan. 30, 1992, pp. 1-8.

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