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Related Experiment Videos

Slag analysis with laser-induced breakdown spectrometry.

M Kraushaar1, R Noll, H U Schmitz

  • 1Fraunhofer-Institut für Lasertechnik (ILT), Steinbachstrasse 15, D-52074 Aachen, Germany.

Applied Spectroscopy
|December 3, 2003
PubMed
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Laser-induced breakdown spectrometry (LIBS) offers rapid, multi-elemental analysis of steel plant slag. This method simplifies sample preparation and achieves high accuracy, paving the way for on-line industrial applications.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Spectroscopy

Background:

  • Chemical analysis of steel slag is crucial for process control and numerical simulations.
  • Traditional methods often require time-consuming sample preparation.
  • Variations in slag elemental composition (up to 30%) necessitate robust analytical techniques.

Purpose of the Study:

  • To apply Laser-Induced Breakdown Spectrometry (LIBS) for multi-elemental analysis of steel plant slag.
  • To develop a method that bypasses traditional, lengthy sample preparation steps.
  • To establish LIBS as a viable alternative to X-ray fluorescence (XRF) for slag analysis.

Main Methods:

  • Utilized a novel probe system for direct analysis of solidified liquid slag, eliminating sample preparation.

Related Experiment Videos

  • Employed multivariate calibration models to address matrix effects from varying elemental concentrations.
  • Optimized LIBS measurement parameters and calibration models for enhanced accuracy and repeatability.

    • Main Results:

    • Achieved a high coefficient of determination (r²) of 0.99 when comparing LIBS to standard XRF analysis for major components (CaO, SiO2, Fetot).
    • Demonstrated improved measurement repeatability for key elements, with a relative standard deviation below 1.0%.
    • Validated LIBS as a precise and efficient tool for slag elemental composition determination.

    Conclusions:

    • LIBS provides accurate and repeatable multi-elemental analysis of steel slag with simplified sample handling.
    • The developed method shows strong agreement with established XRF techniques.
    • This research lays the foundation for implementing on-line LIBS analysis in the steel-making industry.