Apparatus and method for melting and refining of a glass melt using the apparatus and

Apparatus for melting and refining a glass melt, with a sealing portion (2) and a downstream and separate from the sealing portion Lauterabschnitt (6) for refining the molten glass, wherein the sealing portion (2) comprises two Einschmelzwannen (10a, 10b) which are separated from each other are connected to the Lauterabschnitt (6) and independently operable, characterized in that the Einschmelzwannen respectively a first outlet for discharging the molten glass in the Lauterabschnitt and a second outlet for full venting of the molten glass from the respective melting end without nachgeordeten in a process section to is assigned to flow, wherein the first outlets are independently closable.