Importance

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Abstract

Foundry furnace particularly for light non-ferrous metal, such as zinc or aluminum, including a longitudinal chamber (4, 8, 11, 12) made of a heat-resistant material, including close to one end an inlet for scrap (18) and/or bars (5), a slag outlet (5,6), an outlet flow passage (13) including a dispensing opening (14) at the other end, and heating elements for melting the metal, including direct radiating resistance elements (3, 3') in the cover of the chamber (4, 12) and vertically free moving dip-elements (9) extending downwardly from the cover of the chamber (8) for flowing on and into the melt metal in the chamber (8). According to the invention the height of the outlet flow passage is around 1/3-2/3 of the height of the chamber (8, 12), and the active part (7) of the dip-elements in the vertical direction at most equals the distance of the bottom (16) of the outlet flow passage (13) from the bottom (17) of the chamber. The foundry furnace can be operated although there are big variations in the feeding in and out, and the feeding out can be totally stopped, for instance for exchanging a valve (24) in the dispensing opening (14) without the need for emptying the foundry furnace from melt.

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First Claim