Scrap must be sorted into specific classes based on the requirements for the steel grades to be produced. It’s essential impurities are identified at this stage to avoid unwanted tramp elements ending up in the melt. As scrap comes in all shapes and sizes, the main analyzer requirements here are portability and speed.
For rapid alloy identification, handheld LIBS (laser induced breakdown spectroscopy) analysis is sufficient. However, measurement of low levels of sulfur or phosphorous requires XRF (X-ray fluorescence) or OES (optical emission spectroscopy) technology.