| abstract |
An object of the present invention is to extend the life of a tank and improve the quality of a glass melt during the life cycle of the tank. A tank for forming and / or holding a glass melt comprising a first side wall, a second side wall, and a bottom wall, wherein each of the first side wall and the second side wall comprises (A) A front electrodeless surface facing the glass melt, (A2) a rear electrodeless surface, and (A3) a first refractory material having a thickness TH1 and (A1) having a height HT1 and a width WT1. A non-electrode portion having (B) a thickness TH2, (B1) a front electrode surface facing the glass melt having a height HT2 and a width WT2, and (B2) a rear electrode surface having a rear electrode surface A portion, and (B3) at least one electrode having a second refractory material different from the first refractory material and propelled to move the at least one electrode inward toward the center of the vessel relative to the electrodeless portion An electrode propulsion mechanism adapted to: 0.01 ≦ HT2 / HT1 <1.00. [Selection] Figure 2 |