Patent ID: 7694533
Filing Date: 2010-04-13
Classification: C03B

Abstract:
1. A method for the refining of glass, which is heated by irradiation of high-frequency energy, by means of high temperatures in a skull crucible, comprising: introducing a glass melt in a melting-down basin of the skull crucible through an inlet disposed at an upper region of the skull crucible; coupling the high-frequency energy into the glass melt of the skull crucible with a high frequency coil to heat the glass melt in the melting-down basin to a temperature of between 1,750 to 3,000° C.; discharging the glass melt from the melting-down basin through an outlet disposed at the upper region so that the melt overflows from the melting-down basin into an open top overflow channel, which is in fluid communication with a refining device, the outlet being disposed at a place essentially lying opposite the inlet; and preventing a short-circuit flow between the inlet and the outlet by increasing a temperature difference between the glass melt introduced at the inlet and the glass melt within the melting-down basin via the high frequency coil.