Fast vacuum slag analysis in a steel works by laser-induced breakdown spectroscopy

Sturm, Volker; Schmitz, H.-U.; Reuter, Thomas; Fleige, Rüdiger; Noll, Reinhard

doi:10.1016/j.sab.2008.08.004

Cited by 47 publications

(28 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of the first group of parameters is quantified in the k t coefficient, introduced in our previous work [20], which depends on the oscillator strength and other atomic data of the transition as well as on the plasma temperature. The k t concept has been used by other groups to estimate selfabsorption in LIBS experiments [24][25][26][27][28] or as a starting point for the development of self-absorption models [9,12,13]. However, the k t coefficient allows comparing the optical depth of lines of a given element and ionization state if the lines have the same line shape.…”

Section: Introductionmentioning

confidence: 99%

CSigma graphs: A new approach for plasma characterization in laser-induced breakdown spectroscopy

Aragón

Aguilera

2014

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

a b s t r a c tA generalization of curves of growth called CSigma (Cσ) graphs, which allows including several lines of various elements in the same ionization state at different concentrations, is proposed for laser-induced breakdown spectroscopy (LIBS) experiments. The method relies on the Boltzmann, Saha and radiative transfer equations for plasmas in local thermodynamic equilibrium. Cσ graphs are based on the calculation of a line cross section σ l for each of the experimental data, starting from the atomic data of the line, the temperature and the electron density. A model of homogeneous plasma, applied separately for neutral atoms and ions, is used. A limit of validity is established for this model. Experimental Cσ graphs have been obtained using fused glass samples containing Fe, Mn, Mg, Si and Cr. By fitting experimental Cσ graphs to calculated curves, the LIBS system becomes characterized by a set of four parameters βA, Nl, T, N e , different for neutral atoms and ions. Starting from this characterization, the intensity and selfabsorption of a given spectral line of an element at a certain concentration may be predicted, provided that its atomic data are known and the limit of validity is not exceeded.

show abstract

Section: Introductionmentioning

confidence: 99%

CSigma graphs: A new approach for plasma characterization in laser-induced breakdown spectroscopy

Aragón

Aguilera

2014

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

show abstract

“…Some of these methods measure slag composition directly by electrochemical sensor 3,4) or by laser-induced breakdown spectroscopy (LIBS), [5][6][7] while others measure the slag composition indirectly by monitoring off-gas composition 8) or electrical parameters. 9) Both of these types have their advantages and limitations.…”

Section: On-line Analysis Of Cr 2 O 3 Content Of the Slag In Pilot Scmentioning

confidence: 99%

On-line Analysis of Cr<sub>2</sub>O<sub>3</sub> Content of the Slag in Pilot Scale EAF by Measuring Optical Emission Spectrum of Electric Arc

et al. 2017

View full text Add to dashboard Cite

“…Noll et al [10] analyzed the light elements including phosphorus, sulfur and carbon in liquid steel and the estimated limits of detection for these minor elements are lower than 21 µg/g. Noll et al also analyzed slag samples taken from the liquid slag layer in a vacuum degasser station [11] by using a semi-online setup and taking 80 s to fulfill the whole measurement process.…”

Section: Higher Education Press and Springer-verlag Berlin Heidelbementioning

confidence: 99%

Recent progress on the application of LIBS for metallurgical online analysis in China

et al. 2012

View full text Add to dashboard Cite

Recent progress on the application of laser-induced breakdown spectroscopy (LIBS) for metallurgical analysis particularly achieved by Chinese research community is briefly reviewed in this article. The content is mainly focused on the progress in experimental research and calibration methods toward LIBS applications for metallurgical online analysis over the past few years. Different experiment setups such as single-pulse and double-pulses LIBS schematics are introduced. Various calibration methods for different metallic samples are presented. Quantitative results reported in the literature and obtained in the analysis of various samples with different calibration methods are summarized. At the last section of this article, the difficulties of LIBS application for molten metal analysis in a furnace are discussed.Keywords laser-induced breakdown spectroscopy (LIBS), metallurgical analysis, molten metal, calibration methods 52.90.+z PACS numbers

show abstract

Fast vacuum slag analysis in a steel works by laser-induced breakdown spectroscopy

Cited by 47 publications

References 5 publications

CSigma graphs: A new approach for plasma characterization in laser-induced breakdown spectroscopy

CSigma graphs: A new approach for plasma characterization in laser-induced breakdown spectroscopy

On-line Analysis of Cr<sub>2</sub>O<sub>3</sub> Content of the Slag in Pilot Scale EAF by Measuring Optical Emission Spectrum of Electric Arc

Recent progress on the application of LIBS for metallurgical online analysis in China

Contact Info

Product

Resources

About