Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – With means to discharge molten material
Patent
1979-06-12
1981-05-19
Rutledge, L. Dewayne
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
With means to discharge molten material
137341, 222593, 222600, 266271, C21C 542
Patent
active
042680166
ABSTRACT:
An electrically heated valve element for sliding type valve joints in the outlet of a molten metal vessel has an electrical heating conductor disposed predominately in the outlet closing surface section of the valve element so that when moved to the casting position where the molten metal flow passage aligns with the flow passage from the vessel, the outlet closing surface of the element is maintained at a uniformly high temperature so that any cooling down of the outlet closing surface is avoided. The valve element is made by embedding the heating conductor which is air annealed nichrome wire in spiral form, into the refractory material of the valve element by vibration, the embedding mass being free of organic substances, carbon, sulfur, metallic iron, alkalies and/or electrically conductive substances.
REFERENCES:
patent: 2943370 (1960-07-01), Murarsheed
patent: 3018789 (1962-01-01), Pagonis
patent: 3581948 (1971-06-01), Detalle
patent: 4076153 (1978-02-01), Tinnes
patent: 4175974 (1979-11-01), Grabner et al.
Eschner Axel
Jeschke Peter
Leupold Hermann
Didier-Werke AG
Rutledge L. Dewayne
Sheehan John P.
Zegeer Jim
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