More efficient refining method saves 40 per cent energy
The production of glass requires high temperatures and consumes a lot of energy. Thanks to a newly developed method, the energy demand can now be lowered by up to 40 % in a central part of special-purpose glass production — the refining process.
The BINE-Projektinfo brochure “Energy-saving production of special-purpose glass” (05/2014) introduces the concept. The central component is a crucible made of the high-temperature resistant metal iridium, which can withstand high temperatures without cooling.
In the refining step, undesired impurities in the molten glass are removed. The glass melt in the crucible is heated up to 1,600 °C to remove trapped bubbles. Conventional copper crucibles have to be cooled.
The newly developed iridium crucible can withstand a temperature of up to 1,750 °C. With a throughput of 50 tonnes per day per furnace, it is possible to save about 5,000 MWh of electricity per year.
The method is currently only suitable for aluminosilicate glass. The researchers are currently working to apply the process to borosilicate glass as well. This economically more significant type of glass is used for ovenware and laboratory glassware, amongst others. The research project was carried out by Schott in Mainz.
The BINE-projectinfobrochure, which can be obtained free of charge from the BINE Information Service at FIZ Karlsruhe, is available online at www.bine.info or by calling +49 (0)228 92379-0.
About BINE Information Service
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The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.
About FIZ Karlsruhe
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Rüdiger Mack | idw - Informationsdienst Wissenschaft
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