Screening glass ceramic and leaded glass contaminants in glass recycling streams via handheld X-Ray fluorescence (HHXRF) analyzers

McDowell, Dillon; Olympus Scientific Solutions America; United States

McDowell, D.; OSSA; USA
Thurston, A.; OSSA; USA

ID: ECNDT-0159-2018
Download: PDF
Session: Process Control 1
Room: R2
Date: 2018-06-12
Time: 11:30 - 11:50

Material recovery facilities (MRFs) typically use magnetic and optical sorting systems to separate contaminants from recycled glass cullet streams. However, these systems are not effective at screening glass ceramic and leaded constituents from cullet streams. These contaminants lower the value of glass cullet to glass manufacturers, as they present health and safety risks. Handheld X-ray fluorescence (HHXRF) analyzers are widely used in various recycling and manufacturing settings to quickly provide chemical composition on a variety of elements, even to the range of 1–10 ppm. We compare HHXRF analysis of prepared glass samples to laboratory assayed glass standards used by MRFs and glass manufacturers. Our results show that HHXRF can detect even small quantities (<100 ppm) of ceramic elements in glass and glass cullet streams in situ. We also demonstrate that the same technique can be applied to inline monitoring systems to analyze material streams for the same constituents.