Plant to convert a metallic charge into semifinished products, a

Details Plant to convert a metallic charge into semifinished products, a Plant to convert a metallic charge into semifinished products, a

1987-09-24

1989-01-10

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 1065, 75 1066, C22B 400, C21C 552

Patent

active

047971541

ABSTRACT:
Integrated plant (10) to convert a metallic charge continuously into semi-finished products such as billets, blooms, slabs, bars or ingots, which comprises in close cooperation a chamber (14) to pre-heat a controlled metallic charge, the chamber (14) including a burner (15) and a terminal feeder (16) feeding an electric furnace (17) with a controlled flow, and comprises also the electric furnace (17), a continuously functioning transformer (26), a multifunction manipulator (20) with two independent arms able to rotate circumferentially and to move vertically to handle two ladles (18) at one and the same time at least between a tapping station of the electric furnace (17) and a casting and tapping station (21), and at least one casting and tapping station (21) served by a tundish feeding liquid metal continuously, a station to refine the liquid metal in the ladle (18) being located between the tapping station of the furnace (17) and the tapping and casting station (21).
Smelting method obtained with the plant (10) of the claims hereinbefore, which feeds molten metal continuously at least to one casting station (21) by means of two ladles (18) feeding a tundish alternately and starts with a pre-set and variable metallic charge, such metallic charge being fed continuously in the opposite direction to heating means in a pre-heating chamber (14), such charge feeding continuously with an adjustable flow an electric furnace (17) when liquid metal is tapped regularly and partially into ladles (18) able to move along a circumference, in which method the liquid metal is treated and refined in the ladle (18) before being delivered by one of the ladles (18) alternately into a tundish which transfers it continuously to the casting station (21) while the other ladle (18) is engaged in succession in operations of preparation, charging and refining, the cycle proceeding continuously without operating interference.

REFERENCES:
patent: 4564388 (1986-01-01), Vallomy
patent: 4627601 (1986-12-01), Berthet
patent: 4664701 (1987-05-01), Royzman
patent: 4696458 (1987-09-01), Royzman
John A. Vallomy, "Continuous Electric Furnace Steelmaking--The Consteel Process," Iron and Steel Engineer, Nov. 1985, No. 11, pp. 44-47.

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