Method for minimizing slag carryover

Details Method for minimizing slag carryover Method for minimizing slag carryover

1983-06-21

1984-07-31

Rutledge, L. Dewayne

Metallurgical apparatus

Process

Plugging or tapping

266230, 266272, 222590, 222597, C21C 546

Patent

active

044625740

ABSTRACT:
The invention is of a method for minimizing slag carryover when draining molten metal from a furnace and an article for use in the method. This article is a polyhedral-shaped body having density intermediate that of the slag and metal. When thrown onto the surface of the slag within a restricted area over the taphole, the body will float at the slag-metal interface, and tend to lodge with one of its corners projecting into the taphole as the final portion of remaining metal drains out of the furnace. The shape of the body and its dimensions are selected so as to only partially block the taphole opening, causing flaring of the stream so as to signal a furnace operator of the impending flow of slag from the furnace. The operator then shuts off flow to prevent carryover of slag onto the molten metal already tapped. Since only the edges of the body contact the taphole of the body does not become welded to the wall of the taphole and therefore is easily dislodged without loss of time between heats.

REFERENCES:
patent: 2718389 (1955-09-01), Perrin

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