ERCo has developed a laser-based technology for rapid compositional measurements of batch, real-time sorting of cullet, and in-situ measurements of molten glass. This technology, termed LIBS (Laser Induced Breakdown Spectroscopy) can determine whether or not the batch was formulated accurately in order to control glass quality. It can also be used to determine if individual batch ingredients are within specifications. In the case of cullet feedstocks, the sensor can serve as part of a system to sor cullet by colour and ensure it is free of contaminants. In-situ compositional measurements of molten glass are achieved through immersing a LIBS probe directly into the melt. This technology has been successfully demonstrated in ERCO;s laboratory for batch analysis, cullet sorting, & glass melt measurement. A commercial batch analyser has been operating in a PPG fiberglass plant since August 2004.
