H - Electricity – 05 – B
Patent
H - Electricity
05
B
307/16
H05B 7/02 (2006.01) C22B 9/22 (2006.01) F27B 3/08 (2006.01) H05B 7/06 (2006.01) H05H 1/34 (2006.01) F27D 99/00 (2010.01)
Patent
CA 1168683
ABSTRACT OF THE DISCLOSURE: A plasma melting furnace includes a water-cooled bottom electrode of copper and a temperature probe connected with the bottom electrode. A wearing part of steel is provided in the bottom of the furnace, covering the bottom elec- trode. At least one counter electrode is arranged at a dis- tance above the wearing part for the formation of the plas- ma jet. In order to prevent the risk of a melting through of the bottom electrode as far as to its water-cooled sec- tion on account of a secondary arc, a metal layer is pro- vided between the bottom electrode and the wearing part. The metal layer is formed by a metal having a low thermal conductivity and a low melting point, as compared to copper, as well as a high melting enthalpy. Preferably, a metal layer of lead or its alloys with tin and/or zinc is pro- vided.
393688
Lugscheider Walter
Riegler Ernst
Zajicek Ernst
Fetherstonhaugh & Co.
Voest - Alpine Aktiengesellschaft
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