Patent ID: 8869561

Claim:
A method for the refining of a glass melt, which is heated by irradiation of high-frequency energy, by high temperatures in a core of a skull crucible, the method comprising: introducing the glass melt through an inlet in an upper region of the skull crucible; coupling the high-frequency energy into the glass melt in the skull crucible via a high frequency coil to heat the glass melt to a temperature of between 1,750 to 3,000° C.; refining the glass melt in the skull crucible at a temperature between 1,750 to 3,000° C.; discharging the glass melt through an outlet in the upper region of the skull crucible, the outlet being at a place essentially lying opposite the inlet; and preventing a short-circuit flow of the glass melt between the inlet and the outlet by increasing, via the high frequency coil, a temperature difference between the glass melt flowing into the skull crucible through the inlet and the glass melt in the core of the skull crucible.