Float melting apparatus and method employing axially movable cru

Details Float melting apparatus and method employing axially movable cru Float melting apparatus and method employing axially movable cru

1993-05-26

1995-05-16

Reynolds, Bruce A.

Industrial electric heating furnaces

Induction furnace device

Coreless

373139, 373148, 373151, H05B 622

Patent

active

054167965

ABSTRACT:
Apparatus to float and melt particularly small pieces of high-melting point metal continuously while making the amount of meltable liquid metal greater than the capacity of a crucible. A conductive crucible having segments includes an upper cylindrical crucible portion and a lower closed-end crucible portion. An induction coil is arranged outside the upper crucible portion, whereas an induction coil is arranged below the induction coil. The lower crucible portion is in contact with the upper crucible portion and located on the inside of the induction coil at the initial melting stage. The lower crucible portion is lowered as a columnar metal grows and solidifies between molten metal and the lower crucible portion. A continuous feeder continuously feeds cold material. A molten metal surface thermometer and a molten metal surface level gauge are arranged above the crucible. The operation of the continuous feeder is regulated within a desired range of values of the molten metal surface thermometer. On the other hand, the lower crucible portion is successively lowered within a desired range of values of the molten metal surface level gauge.

REFERENCES:
patent: 3478156 (1969-11-01), Segsworth
patent: 3703601 (1972-11-01), Babel
patent: 4873698 (1989-10-01), Boen
patent: 5012488 (1991-04-01), Stenzel
patent: 5058127 (1991-10-01), Garnier et al.
patent: 5121406 (1992-06-01), Hugo et al.
patent: 5280496 (1994-01-01), Schlecht et al.
"Materials and Processes," vol. 5, No. 1, 1992, CAMP-ISIJ vol. 5 (1992)-201 Discussion 23 Continuous Casting of Titanium Alloy Making Use of an Induction Cold Crucible by Tsutomu Tanaka and Koichi Kurita.
"Materials and Processes," vol. 5, No. 1, 1992, CAMP-ISIJ vol. 5 (1992)-28 Discussion 22 Continuous Casting of Alloy Billets by Use of a Cold Crucible Melting, by Shingo Hitotsuyanagi and Noboru Idemukai.

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