Furnace for melting of glass, comprises a wall made of refractory material having an opening, where the wall defines an inner side facing the melt, and a heating apparatus having a heating electrode and an electrode holder

摘要

The furnace for melting of glass, comprises a wall made of refractory material (102) having an opening, where the wall defines an inner side facing the melt, and a heating apparatus having a heating electrode (101) and an electrode holder (100) connected with the heating electrode, where the heating apparatus is implemented into the opening of the wall so that the heating electrode partially protrudes into the inner side of the melting furnace. The electrode holder is provided in the area that comes in non-operation with a gas melt (106) in contact with a protective coating. The furnace for melting of glass, comprises a wall made of refractory material (102) having an opening, where the wall defines an inner side facing the melt, and a heating apparatus having a heating electrode (101) and an electrode holder (100) connected with the heating electrode, where the heating apparatus is implemented into the opening of the wall so that the heating electrode partially protrudes into the inner side of the melting furnace. The electrode holder is provided in the area that comes in non-operation with a gas melt (106) in contact with a protective coating, which comprises polyurethane. The coated external area of the electrode holder extends itself to all areas of the electrode holder, which are removably arranged in 200 mm from its leading edge facing the melt. The electrode holder is arranged in the melting operation of the furnace with a distance of its holder leading edge to inner side of the wall of 150 mm. The electrode holder comprises a coolant line and the minimum distance of the holder leading edge to the coolant line is 5-50 mm. The width of the gap between the electrode holder and refractory material is 30 mm. The electrode holder comprises a chamfering at the transition from a holder leading edge to an outer peripheral surface, and an opening for receiving the electrode, which is widened conically in the area of the holder leading edge. The electrode holder comprises a ceramic coating in the contact area between the heating electrode and the electrode holder. The ceramic coating contains aluminum oxide and zirconium orthosilicate. The thickness of the ceramic coating is 0.01 mm.