Combination electric furnace and slag retaining pouring spout

Details Combination electric furnace and slag retaining pouring spout Combination electric furnace and slag retaining pouring spout

1985-05-13

1985-11-12

Rosenberg, Peter D.

Metallurgical apparatus

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

75 10R, 75 12, 373 71, 373 72, C21C 544, C21C 552

Patent

active

045523436

ABSTRACT:
The combination of an electric furnace and a slag retaining pouring spout thereon in registry with a modified tap hole is disclosed. The tap hole located in one end of the electric furnace communicates with the interior thereof and the slag retaining pouring spout is positioned on the electric furnace and in communication with the tap hole. The slag retaining pouring spout is angled upwardly and outwardly with respect to the tap hole and positioned above of the molten metal and slag in the operating electric furnace and receives molten metal from the electric furance when the same is tilted to pour the molten metal through the tap hole. The slag retaining pouring spout has a secondary tap hole therein normally closed with a consumable plug during the operation of the electric furnace and the early tap of the molten metal therefrom into the slag retaining pouring spout. A lever arm on the pouring spout carries a plate forming a gate for the secondary tap hole and a circular Argon delivering shroud is positioned around the secondary tap hole. The combination acts to deliver only slag-free molten metal, such as steel, from the electric furnace.

REFERENCES:
patent: 2360065 (1944-10-01), Lewis
patent: 2458236 (1949-01-01), Wolft
patent: 3761242 (1973-09-01), Finkl
patent: 3871632 (1975-03-01), Wunsche
patent: 4324943 (1982-04-01), Stenkvist
patent: 4435812 (1984-03-01), Guido
O'Loughlin, "The Oh, So Simple Charms of EF Bottom Tapping", Metal Producing, vol. 33, pp. 66-69, (Apr. 1984).

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