Increased identification rate of scrap metal using Laser Induced Breakdown Spectroscopy Echelle spectra

Merk, Sven; Scholz, C.; Florek, Stefan; Mory, David

doi:10.1016/j.sab.2015.07.009

Cited by 42 publications

(18 citation statements)

References 24 publications

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“…30 The enlarged rectangle with the marked red spot shows the position preferred for the LIBS measurement. In contrast to other approaches reported so far 6,9,28 where the laser beam direction is kept stationary, the conguration illustrated with Fig. 2 and 4 offers a signicantly higher quality of measuring results by considering the local geometric features of the measuring objects.…”

mentioning

confidence: 87%

“…Merk et al studied the identication of scrap metal by a LIBS set-up with an echelle spectrometer at a WD of 80 cm. 9 Measuring objects were shredded pieces of metals with a single main element such as Ag, Al, Cr, Cu, Fe, Ni, Pb, Sn, Zn and the secondary alloy brass. Sun et al studied the in situ analysis of steel melts with LIBS and a Cassegrain telescope with WDs of 2.8 m and 4.5 m.…”

Section: Introductionmentioning

confidence: 99%

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LIBS analyses for industrial applications – an overview of developments from 2014 to 2018

Noll

Fricke‐Begemann

Connemann

et al. 2018

J. Anal. At. Spectrom.

178

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aMeasuring distances in the range between a few centimetres and a few metres are of special interest for automated industrial LIBS applications. They allow for a reliable optical access to measuring objects in a process line under harsh industrial environments. In that range a compromise can be found between the conflicting requirements with respect to the protection of the optics facing the measuring object on one side, and sufficiently high laser irradiance and high receiving solid angle of the measuring radiation on the other side. A concise overview about LIBS studies published in the last four years focusing on industrial applications or perspectives therefore is given. Recent R&D activities in the field of automated LIBS for industrial applications are presented focusing on the following application cases: (a) combined use of inline measured 3D geometry information and LIBS analyses for high-speed sorting tasks of piece goods; (b) sorting of refractories; (c) identification of steel blooms in a rolling mill; (d) inverse production scenario for the recovery of valuable materials from end-of-life electronic equipment. For measuring distances of only a few centimetres the size of a LIBS instrument can be downscaled significantly allowing to set up handheld LIBS analysers. Whereas the precursors of such concepts were studied already more than fifteen years ago, quite recently a competitive market arose where various models of handheld LIBS systems are offered. Industrial application fields are mainly positive material identification of metals and sorting of light metal scraps for recycling purposes. A comparative synopsis of features of these LIBS systems will be presented and arising research themes in this context are outlined.

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mentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

LIBS analyses for industrial applications – an overview of developments from 2014 to 2018

Noll

Fricke‐Begemann

Connemann

et al. 2018

J. Anal. At. Spectrom.

178

View full text Add to dashboard Cite

show abstract

“…In this case, exact focusing of the laser radiation onto the moving object is crucial to create robust spectral data and to quantify minor components. Setups with stationary laser focus exist [2], but typically require more complex and expensive (high power) laser systems and do not cover the entire variety of object geometries. In contrast, dynamic focusing -the laser follows the shape of the objectallows the use of single-pulse laser configurations with higher repetition rates.…”

Section: Dynamic Focusingmentioning

confidence: 99%

Material Analysis in Fast Industrial Processes by LIBS

Jochum¹,

Günther²,

Bohling³

2019

PhotonicsViews

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Laser‐induced breakdown spectroscopy (LIBS) is recognized as a versatile technique for material analysis; especially in applications in which speed of analysis, sensitivity, and need for minimal or no sample preparation are key issues. These features make LIBS attractive for inline process monitoring, e.g. for material screening and sorting as well as for quality control purposes. However, the transfer of LIBS technology from the lab into high‐speed industrial environments entails technical and analytical challenges which we address in this article.

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“…40 The double-pulses allowed a cleaning and an analytical pulse. A mechanical chopper was used for timing and to gate out the Bremsstrahlung emission.…”

Section: Laser-induced Breakdown Spectroscopy Used In Minerals and Mementioning

confidence: 99%

Novel Applications of Laser-Induced Breakdown Spectroscopy

Bauer

Buckley

2017

Appl Spectrosc

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The goal of this review article is to provide a description of recent and novel laser-induced breakdown spectroscopy (LIBS) applications and developments, especially those discussed during the NASLIBS Conference, held during SciX in Providence, RI, in September 2015. This topic was selected in view of the numerous recent overall review papers that have successfully given a broad view of the current understanding of laser-material interactions and plasma development and have also discussed the wide landscape of analytical applications of LIBS. This paper is divided into sections that focus on a few of the many applications under development in the LIBS community. We provide a summary of updates to calibrationfree LIBS (CF-LIBS) and associated developments using plasma characteristics to improve quantification in LIBS output, both in a dedicated section and as applications are discussed. We have also described the most recent publications studying the sources, generation, and use of molecular features in LIBS, including those naturally present in the spectra of organic materials, and those induced with the addition of salts to enable the measurement of halogens, not typically present in LIBS signals. In terms of development of applications of LIBS, we focused on the use of LIBS for indirect measurements such as pH and degree of humification in soil and heating value in coal. We also reviewed the extant literature on LIBS analysis of agricultural materials, coal, minerals, and metals. Finally, we discuss the nascent developments of spatially heterodyne spectroscopy, a method that seeks to circumnavigate a serious drawback of most spectrometers -very small optical throughput -through the use of interferometers.

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Increased identification rate of scrap metal using Laser Induced Breakdown Spectroscopy Echelle spectra

Cited by 42 publications

References 24 publications

LIBS analyses for industrial applications – an overview of developments from 2014 to 2018

LIBS analyses for industrial applications – an overview of developments from 2014 to 2018

Material Analysis in Fast Industrial Processes by LIBS

Novel Applications of Laser-Induced Breakdown Spectroscopy

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