초록 ▼

An energy-efficient device for refining a glass melt to produce a glass and/or a glass ceramic is provided. The device includes a refining crucible defined at least by lateral walls with a metallic lining as a melt contact surface, so that a melt refining volume is defined by a base surface, a top s

An energy-efficient device for refining a glass melt to produce a glass and/or a glass ceramic is provided. The device includes a refining crucible defined at least by lateral walls with a metallic lining as a melt contact surface, so that a melt refining volume is defined by a base surface, a top surface and a circumferential surface; at least one heating device that conductively heats the lining by an electric current in the lining, so that the melt is heated through the lining, the heating device and the lining are connected to one another by a feeding device. The feeding device establishes contact with the lining so that an electric current runs from the top surface to the base surface or from the base surface to the top surface, at least in sections of the lining.

대표청구항 ▼

1. A device for refining an inorganic non-metallic melt, comprising: a refining crucible with an upper side, a lower side and lateral walls, the lateral walls having a metallic lining as a melt contact surface on an inner surface thereof, the lateral walls include at least a first layer and a second

1. A device for refining an inorganic non-metallic melt, comprising: a refining crucible with an upper side, a lower side and lateral walls, the lateral walls having a metallic lining as a melt contact surface on an inner surface thereof, the lateral walls include at least a first layer and a second layer, the first layer providing stability to the refining crucible, the second layer providing thermal insulation to the refining crucible, the first layer having a higher temperature stability as compared to the second layer, the first layer being adjacent to the metallic lining, the second layer having a lower thermal conductivity as compared to the first layer, and wherein the metallic lining completely provides the melt contact surface of the refining crucible;at least one heating device that conductively heats the metallic lining by an electric current in the metallic lining so that the melt is heated by the metallic lining, wherein the heating device and the metallic lining are connected to one another via a feed device,wherein the feed device establishes contact with the metallic lining by at least one upper connection and at least one lower connection so that, at least in sections of the metallic lining, an electric current passes between an upper side and a lower side, andwherein the refining crucible and the metallic lining are not actively cooled. 2. The device as claimed in claim 1, wherein the electric current runs from the upper side to the lower side. 3. The device as claimed in claim 1, wherein the electric current runs from the lower side to the upper side. 4. The device as claimed in claim 1, wherein the metallic lining forms a collar that covers an upper surface of the lateral walls, at least in sections thereof. 5. The device as claimed in claim 4, wherein the upper connection is associated with one or more of the lateral walls and the collar, and the lower connection is associated with one or more of the lower side and a bottom of the refining crucible. 6. The device as claimed in claim 5, wherein the upper connection is formed as a jacket that extends around a circumference of the lateral walls. 7. The device as claimed in claim 5, wherein the lower connection is formed as a plate that extends around a circumference of at least one of the lower side and a bottom of the refining crucible. 8. The device as claimed in claim 1, wherein the feed device comprises an upper coupling device and a lower coupling device electrically connecting the metallic lining with the heating device. 9. The device as claimed in claim 8, wherein the upper and lower coupling devices each extend around a circumference of the refining crucible. 10. The device as claimed in claim 1, wherein the feed device has an enlarged cross-section as compared to the metallic lining. 11. The device as claimed in claim 1, further comprising at least one cooling device associated with the feed device. 12. The device as claimed in claim 1, further comprising an inductive heating device inductively heating the metallic lining. 13. The device as claimed in claim 1, wherein the lateral walls are inclined relative to one or more of the lower side and a bottom of the refining crucible. 14. The device as claimed in claim 1, wherein the lateral walls have a multi-layered structure. 15. The device as claimed in claim 1, wherein the lateral walls further comprise a third layer arranged between the first layer and the metallic lining. 16. The device as claimed in claim 15, wherein the third layer comprises a fabric. 17. The device as claimed in claim 1, wherein the first layer has a substantially L-shaped cross-section and wherein one leg thereof extends outwards above the second layer. 18. The device as claimed in claim 1, further comprising one or more gas supply lines that extend through the lateral walls so that a defined atmosphere is providable at a side of the metallic lining facing away from the melt. 19. The device as claimed in claim 1, wherein the heating device supplies the electric current at a frequency from 10 Hz to 10 kHz. 20. A method for producing a glass and/or a glass-ceramic, comprising: melting a batch to provide a glass melt; andrefining the glass melt by increasing a temperature of at least a part of the glass melt adjacent to a lateral wall by conductively heating via an electric current to a metallic lining of the lateral wall that completely provides a melt contact surface with the glass melt, the lateral walls including at least a first layer adjacent to the metallic lining and a second layer, the first layer having a higher temperature stability as compared to the second layer, the second layer having a lower thermal conductivity as compared to the first layer, wherein an electric potential difference is provided in the lateral wall so that a direction of current flow in the lateral wall is between a top and a bottomwherein the refining step comprises not actively cooling the lateral wall. 21. The method as claimed in claim 20, wherein the direction of current flow in the lateral wall is from the top to the bottom. 22. The method as claimed in claim 20, wherein the direction of current flow in the lateral wall is from the bottom to the top. 23. The method as claimed in claim 20, further comprising exposing the refined glass melt to a process selected from the group consisting of: homogenizing the refined glass melt, conditioning the refined glass melt, shaping the refined glass melt, cooling the refined glass melt, heat treating the refined glass melt, and any combinations thereof. 24. A device for refining an inorganic non-metallic melt, comprising: a refining crucible with an upper side, a lower side and lateral walls, the lateral walls having a metallic lining as a melt contact surface on an inner surface thereof, the lateral walls include at least a first layer and a second layer, and wherein the metallic lining completely provides the melt contact surface of the refining crucible, the first layer providing stability to the refining crucible, the second layer providing thermal insulation to the refining crucible, the first layer having a higher temperature stability as compared to the second layer, the first layer being adjacent to the metallic lining, and the second layer having a lower thermal conductivity as compared to the first layer;at least one heating device that conductively heats the metallic lining by an electric current in the metallic lining so that the melt is heated by electric resistance heating of the metallic lining, wherein the heating device and the metallic lining are connected to one another via a feed device,wherein the feed device establishes contact with the metallic lining by at least one upper connection and at least one lower connection so that, at least in sections of the metallic lining, an electric current passes between an upper side and a lower side. 25. A method for producing a glass and/or a glass-ceramic, comprising: melting a batch to provide a glass melt; andrefining the glass melt by increasing a temperature of at least a part of the glass melt adjacent to a lateral wall by conductively heating via electric resistance heating by passing an electric current in a metallic lining of the lateral wall, the lateral wall having a first layer adjacent the metallic lining and a second layer, the first layer having a higher temperature stability as compared to the second layer, the second layer having a lower thermal conductivity as compared to the first layer, and the metallic lining completely providing a melt contact surface with the glass melt, wherein an electric potential difference is provided in the metallic lining of the lateral wall so that a direction of current flow in the metallic lining of the lateral wall is between a top and a bottom. 26. The method as claimed in claim 25, wherein the direction of current flow in the metallic lining of the lateral wall is from the top to the bottom. 27. The method as claimed in claim 25, wherein the direction of current flow in the metallic lining of the lateral wall is from the bottom to the top.