Ardagh Glass Dongen B.V., Eindsestraat 133, NL-5105 NA Dongen (Netherlands)
Between today and 2050 the European industry faces 2 decisive challenges that were never more actual than today. First comes the challenge to decarbonise manufacturing and distribution of goods, second is the necessity to reduce the use of natural resources with the target of a circular economy, where the waste product of one process is the raw material for another process.
The glass industry from the beginning of glass making has always recycled the own internal waste in the form of frits or cullet. In the 2nd half of the 20th century more and more recycling and collecting systems were set-up and nowadays recycling cullet is the main raw material to produce container glass.
Various technologies are under investigation to reduce the fossil carbon footprint of the industry. Significant reductions seem possible in the future. Emissions from carbonate raw materials however are not included, so there will always remain some CO2 emissions – the so-called process emissions.
This paper tries to combine answers to both questions of CO2 emissions and circular economy by directing the attention to potential raw materials for the production of container glass.
Filter dust from other industries, slags from metal processing and other waste materials can be used in the container glass industry to replace virgin materials partially or sometimes fully. Based on information about available materials some model compositions are described to melt standard container glass with the use of waste stream materials.
Most examples are based on calculations only, the practical experience to apply waste materials is limited. Aim of this paper is not so much to provide proven and ready to use solutions for waste material application but to initiate a search for possibilities to go beyond the recycling of materials that is already standard in the industry.