Jinmei Wang, Jianshu Lu, Peichao Zheng, Shaojian Liu, Gang Li, Guanghui Chen. Study on Alkalinity Measurement of Sinter Based on LIBS Technology Combined with Internal Standard Method[J]. Chinese Journal of Lasers, 2023, 50(22): 2211001
- Chinese Journal of Lasers
- Vol. 50, Issue 22, 2211001 (2023)
Fig. 1. Experimental diagram of LIBS
Fig. 2. LIBS of sinter
Fig. 3. Effects of pressures on spectral signals of Fe, Si,and Ca. (a) Signal stability; (b) signal intensity
Fig. 4. Effects of laser energy on spectral signals. (a) Fe Ⅱ 248.266 nm; (b) Si Ⅰ 288.158 nm; (c) Ca Ⅰ 647.166 nm
Fig. 5. Effects of delay time on spectral signals of laser-induced sinter samples. (a) Fe Ⅱ 248.266 nm; (b) Si Ⅰ 288.158 nm;(c) Ca Ⅰ 647.166 nm
Fig. 6. Test results of spectral signal stability of different elements. (a) Fe element; (b) Si element; (c) Ca element
Fig. 7. Calibration curves before processing by internal standard method. (a) Intensity ratio of Ca Ⅰ 647.166 nm and Si Ⅰ 288.158 nm; (b) intensity ratio of Ca Ⅰ 422.673 nm and Si Ⅰ 288.158 nm
Fig. 8. Calibration curves after processing by internal standard method. (a) r1/r2; (b) r3/r2
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Table 1. Main components and alkalinity values of 10 sintered ore samples
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Table 2. Energy level values of analytical spectral lines
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Table 3. Comparison and analysis of alkalinity prediction results
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