At-line monitoring of continuous casting sequences of steel using discriminant function analysis and dual-pulse laser-induced breakdown spectroscopy

2017 ◽  
Vol 32 (6) ◽  
pp. 1119-1128 ◽  
Author(s):  
J. Ruiz ◽  
T. Delgado ◽  
L. M. Cabalín ◽  
J. J. Laserna
Keyword(s):  
Continuous Casting ◽  
Steel Surface ◽  
Function Analysis ◽  
Extreme Environment ◽  
Laser Induced Breakdown Spectroscopy ◽  
Steelmaking Process ◽  
Breakdown Spectroscopy ◽  
System P ◽  
Casting System ◽  
Laser Induced Breakdown

Among the several controlling routines utilized in the steelmaking process, analytical operations during continuous casting are especially demanding due to the extreme environment of steel plants and the crude conditions of the steel surface at the exit of the casting system.

Distinction strategies based on discriminant function analysis for particular steel grades at elevated temperature using stand-off LIBS

2016 ◽  
Vol 31 (11) ◽  
pp. 2242-2252 ◽  
Author(s):  
T. Delgado ◽  
J. Ruiz ◽  
L. M. Cabalín ◽  
J. J. Laserna
Keyword(s):  
Elevated Temperature ◽  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Steel Grades ◽  
Chemometric Tools

This work presents experimental discrimination strategies based on advanced chemometric tools for the differentiation of steel grades using stand-off laser-induced breakdown spectroscopy.

Laser-induced breakdown spectroscopy using laser pulses delivered by optical fibers for analyzing Mn and Ti elements in pig iron

2015 ◽  
Vol 30 (2) ◽  
pp. 403-409 ◽  
Author(s):  
Qingdong Zeng ◽  
Lianbo Guo ◽  
Xiangyou Li ◽  
Chao He ◽  
Meng Shen ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Laser Pulses ◽  
Laser Induced Breakdown Spectroscopy ◽  
Pig Iron ◽  
Breakdown Spectroscopy ◽  
System P ◽  
Laser Induced Breakdown

A portable FO-LIBS system can achieve comparable results with the conventional LIBS system.

scholarly journals Laser-induced breakdown spectroscopy of scaled steel samples taken from continuous casting blooms

2016 ◽  
Vol 123 ◽  
pp. 171-178 ◽  
Author(s):  
Christoph Meinhardt ◽  
Volker Sturm ◽  
Rüdiger Fleige ◽  
Cord Fricke-Begemann ◽  
Reinhard Noll
Keyword(s):  
Continuous Casting ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

scholarly journals Quantitative Classification of Quartz by Laser Induced Breakdown Spectroscopy in Conjunction with Discriminant Function Analysis

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
A. Ali ◽  
M. Z. Khan ◽  
I. Rehan ◽  
K. Rehan ◽  
R. Muhammad
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Detection System ◽  
Function Analysis ◽  
Ambient Pressure ◽  
Laser Induced Breakdown Spectroscopy ◽  
Quantitative Classification ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

A responsive laser induced breakdown spectroscopic system was developed and improved for utilizing it as a sensor for the classification of quartz samples on the basis of trace elements present in the acquired samples. Laser induced breakdown spectroscopy (LIBS) in conjunction with discriminant function analysis (DFA) was applied for the classification of five different types of quartz samples. The quartz plasmas were produced at ambient pressure using Nd:YAG laser at fundamental harmonic mode (1064 nm). We optimized the detection system by finding the suitable delay time of the laser excitation. This is the first study, where the developed technique (LIBS+DFA) was successfully employed to probe and confirm the elemental composition of quartz samples.

Online mercury determination by laser-induced breakdown spectroscopy with the assistance of solution cathode glow discharge

2015 ◽  
Vol 30 (4) ◽  
pp. 867-874 ◽  
Author(s):  
Peichao Zheng ◽  
Hongdi Liu ◽  
Jinmei Wang ◽  
Minjie Shi ◽  
Xiaomeng Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Glow Discharge ◽  
Laser Induced Breakdown Spectroscopy ◽  
Mercury Determination ◽  
Breakdown Spectroscopy ◽  
System P ◽  
Laser Induced Breakdown

The trace mercury in an aqueous solution was determined by laser-induced breakdown spectroscopy (LIBS) with the assistance of a solution cathode glow discharge (SCGD) system.

Micro-destructive analysis with high sensitivity using double-pulse resonant laser-induced breakdown spectroscopy

2019 ◽  
Vol 34 (6) ◽  
pp. 1198-1204 ◽  
Author(s):  
Zhiyang Tang ◽  
Ran Zhou ◽  
Zhongqi Hao ◽  
Shixiang Ma ◽  
Wen Zhang ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Double Pulse ◽  
Laser Induced Breakdown Spectroscopy ◽  
Beam Splitting ◽  
Single Beam ◽  
Breakdown Spectroscopy ◽  
System P ◽  
Resonant Laser ◽  
Destructive Analysis ◽  
Laser Induced Breakdown

To achieve micro-destructive analysis with high sensitivity, single beam splitting and an appropriate optical geometric configuration were used to establish a double pulse resonant laser-induced breakdown spectroscopy (DP-RLIBS) system.

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

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