Abstract
For the rapid and precise sorting of steel scrap with relatively high contents of copper, laser-induced breakdown spectroscopy (LIBS) is a promising method. It has several advantages such that it can work under ambient air atmospheres, and specimens can be tested without any pretreatment, such as acid digestion, polishing of the surface of the specimens, etc. For the application of LIBS for actual steel scrap, we obtained emission spectra by an LIBS system, which was mainly comprised of an Nd:YAG laser, an Echelle-type spectrometer, and an ICCD detector. The standard reference materials (SRMs) of JISF FXS 350-352, which are Fe-Cu binary alloy and have certified concentrations of copper, were employed for making calibration lines. Considering spectral interferences from the emission lines of the iron matrix in the alloys, Cu I lines having wavelengths of 324.754 and 327.396 nm could be chosen. In five replicate measurements of each SRM, shorter delay times after laser irradiation and longer gate widths for detecting the transient emission signal are suggested to be the optimal experiment parameters. In the determination process, utilizing the calibration line from Cu I 327.396 nm was better because of less spectral interference. By using 200 pulsed laser shots for the measurement sequence, a limit of detection of 0.004 Cu at% could be obtained.
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References
The Basic Law for Establishing the Recycling-based Society, The Ministry of Environment, Japan, 2000, http://law.e-gov.go.jp/htmldata/H12/H12HO110.html.
The Japan Iron and Steel Federation, http://www.jisf.or.jp/data/.
Non-Intergrated Steel Producers Association, http://www.fudenkou.jp/about_03.html.
Uniform Standards of Ferrous Scrap, The Japan Ferrous Raw Materials Association, http://www.tetsugen.gol.com/kikaku/index.htm.
The Society of Materials Science, Japan, http://www.jsms.jp/word/index-kato.html.
L. Savov, E. Volkova, and D. Janke, RMZ - Mater. Geoenviron., 2003, 50, 627.
T. Kajitani, M. Wakoh, N. Tokumitsu, S. Ogibayashi, and S. Mizoguchi, Tetsu-to-Hagane (in Japanese), 1995, 81, 185.
K. Yamamoto, T. Toh, H. Hamatani, K. Tsunenari, K. Umetsu, Y. Maruki, S. Takeuchi, and Y. Yamada, Engineering Report of Nippon Steel & Sumitomo Metal (in Japanese), 2012, 394, 69.
T. M. Naeem, H. Matsuta, and K. Wagatsuma, ISIJ Int., 2002, 42, 1318.
K. Kuzuya, M. Murakami, and N. Maruyama, Spectrochim. Acta, Part B, 2003, 58, 957.
Y. Ushirozawa and K. Wagatsuma, Anal. Sci., 2006, 22, 1011.
Y. Iida, Spectrochim. Acta, Part B, 1990, 45, 1353.
T. L. Thiem, R. H. Salter, J.A. Gardner, Y. I. Lee, and J. Sneddon, Appl. Scpectrosc., 1994, 48, 4.
L. Fornarini, F. Colao, and R. Fantoni, Spectrochim. Acta, Part B, 2005, 60, 1186.
H. Shimada and K. Wagatsuma, Bunseki Kagaku, 2011, 60, 59.
V. Lazic, F. Brrbini, and R. Fantoni, Spectrochim. Acta, Part B, 2001, 56, 807.
G. Gupta, B. Suri, and A. Verma, J. Alloys Compd., 2011, 509, 3740.
M. Garcimuno, M. Pace, and G. Bertuccelli, Opt. Laser Technol., 2013, 47, 26.
A. Sarkar, D. Alamelu, and S. Aggarwal, Opt. Laser Technol., 2013, 47, 30.
S. Beatrice, A. David, and A. Sylvestre, Spectrochim. Acta, Part B, 2005, 60, 479.
S. Kashiwakura and K. Wagatsuma, CAMP-ISIJ, 2012, 25, 1264.
L. Zhang and K. Wagastuma, ISIJ Int., 2013, 58, in press.
L. Zhang, S. Kashiwakura, and K. Wagatsuma, Key Eng. Mater., 2012, 508, 331.
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Kashiwakura, S., Wagatsuma, K. Characteristics of the Calibration Curves of Copper for the Rapid Sorting of Steel Scrap by Means of Laser-induced Breakdown Spectroscopy under Ambient Air Atmospheres. ANAL. SCI. 29, 1159–1164 (2013). https://doi.org/10.2116/analsci.29.1159
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DOI: https://doi.org/10.2116/analsci.29.1159