Electric melting furnace for vitrifying waste

Industrial electric heating furnaces – Glass furnace device – Joule effect heating

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373 27, 373 29, 373 36, 373 39, C03B 5027

Patent

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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.

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