US 6,983,006 B2
All-electric glass-melting deep furnace and method of refining and supplying glass
Motoaki Miyazaki, 275-4, Irie, Maihara-cho, Sakata-gun, Shiga 521-0003 (Japan)
Filed on Mar. 31, 2004, as Appl. No. 10/814,980.
Claims priority of application No. 2003-097624 (JP), filed on Apr. 01, 2003.
Prior Publication US 2004/0196886 A1, Oct. 07, 2004
Int. Cl. C03B 5/027 (2006.01)
U.S. Cl. 373—29 10 Claims
OG exemplary drawing
 
1. An all-electric glass-melting deep furnace comprising:
a bottom; and
a side wall constructed by piling up fireproof bricks on a perimeter of the bottom, said side wall extending upwardly from the perimeter of the bottom, inclining inwardly, thereby being substantially trapezoidal in shape as viewed from the side, and thereby defining an inside lateral dimension of the bottom;
wherein heating electrodes jut from an inner surface of the side wall and pass a current through molten glass filled inside the side wall, a height of the side wall being at least twice that of the inside lateral dimension of the bottom, and distances from the heating electrodes to the bottom of the furnace being at least equal to the inside lateral dimension of the bottom.