Industrial electric heating furnaces – Glass furnace device – Joule effect heating
Patent
1990-05-16
1991-10-29
Reynolds, Bruce A.
Industrial electric heating furnaces
Glass furnace device
Joule effect heating
373 27, 373 29, 373 36, 373 39, C03B 5027
Patent
active
050621181
ABSTRACT:
An electric melting furnace for vitrifying waste, having a melting tank having walls of refractory bricks, the melting tank being provided at the upper portion thereof with a supply port for a glass additive and waste and at the bottom portion thereof with a discharge port for molten glass containing the waste; at least a pair of side electrodes horizontally provided on opposite side walls of the melting tank; and at least one central electrode having a polarity opposite to that of the side electrodes, the central electrode being horizontally positioned in the interior of the melting tank at substantially the middle portion between the side electrodes. By such melting furnace construction, as described above, the heating current selectively flows through between the side electrodes and the central electrode, and does not flow electrically conductive substances deposited on the furnace bottom.
REFERENCES:
patent: 2749378 (1959-03-01), Penberthy
patent: 4143232 (1979-03-01), Bansal et al.
patent: 4782497 (1988-11-01), Sasaki et al.
Horst Wiese, "Industrial Vitrification of High Level Liquid Waste with the Pamela Plant in Belgium", Sep. 1988, p. 76.
"Development of Glass Melter for the PNC Tokai Vitrification Facility", Shin-Ichiro Torata, Sep. 1988, p. 82.
Doryokuro Kakunenryo Kaihatsu Jigyodan
Hoang Tu
Reynolds Bruce A.
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