Electric heating – Metal heating – Of cylinders
Patent
1976-10-12
1978-05-16
Mayewsky, Volodymyr Y.
Electric heating
Metal heating
Of cylinders
13 25, 13 26, 219 1075, 219421, 219426, 219437, 219438, 219523, 266240, H05B 500
Patent
active
040900541
ABSTRACT:
A preheating arrangement for bringing foundry ladles up to temperature is described. The arrangement comprises a slotted elongated graphite rod extending down from a ladle cover, a pair of clamp and contact elements extending through the cover and a transformer above the cover with a shell around the transformer forming a single turn secondary winding connected directly to the clamp and contact elements. A graphite element is coated to protect it from corrosive atmospheres by heating it, while buried in sand, to the fusing temperature of the sand and then allowing it to cool.
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Brown Boveri Technical Data Sheets EQ 252, "Graphite-rod rocking furnaces" (undated), 3 pp.
Cesiwid brochure "Cesiwid-Graphite Heating Elements up to 3000.degree. C", Cesiwid Electrowarme GmbH, (undated), 14 pp.
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Industrial catalog pp. 30, 38, 44, 46, 51 and 52, "Ladles" (undated).
North American Mfg. Co., Bulletin 46.96(5-61), "Gas-Compressed Air Torches", 3-1961, 2 pp.
R. D. Gray; "New Holding Furnace Uses Resistance Heatings", Foundry M & T, Jul. 1975, pp. 65, 66, 68, 69 and 72.
Heine Hans Gunther
Hochstrasser Otto
Brown Boveri Corporation
Mayewsky Volodymyr Y.
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