Utilizing Handheld X-Ray Fluorescence for In-Process Steel Slag Mon...

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Utilizing Handheld X-Ray Fluorescence
for In-Process Steel Slag Monitoring
Alex Thurston
Olympus Scientific Solutions Amer...

Overview
XRF Theory and Handhelds
Introduction to HHXRF Slag Analysis Application
Raw Data and Treatment
Data Regressi...

XRF Theory
K
L
M

XRF Theory
Magnesium through plutonium detection

Introduction to HHXRF Slag Analysis Application
Initial Data (“Out of the Box”)
Rapid tests used to gather data
20–30 s...

Introduction to HHXRF Slag Analysis Application
Initial Data (“Out of the Box”)
 Olympus Vanta™ VMR XRF analyzer
used
 ...

Raw Data and Treatment
Initial Data (“Out of the Box”)
 Export-collected data for analysis
Al2O3
Read
Al2O3
Lab
CaO
Read...

Raw Data and Treatment
Initial Data (“Out of the Box”)
Plot and analyze for trends
y = 1.3499x - 0.7514
R² = 0.8557
0.00...

Raw Data and Treatment
Initial Data (“Out of the Box”)
Plot and analyze for trends
y = 1.0954x + 0.4701
R² = 0.9352
0.00...

Raw Data and Treatment
Initial Data (“Out of the Box”)
Plot and analyze for trends
y = 1.2422x - 6.4146
R² = 0.9558
5.00...

Raw Data and Treatment
Data Analysis for Sample Configuration
Alignment of experimental data to lab values
Large data s...

Raw Data and Treatment
Data Analysis for Sample Configuration
Calculation of “User Factors”
Example—Al2O3: y = 1.3499x ...

Data Regression and Verification
Apply and Test the Configuration
Software can reprocess collected spectra much
faster t...

Data Regression and Verification
Apply and Test the Configuration
Regressed results
y = 1.0021x - 0.0752
R² = 0.953
28.0...

Data Regression and Verification
Apply and Test the Configuration
Regressed results
y = 1.0007x - 0.0029
R² = 0.8554
0.0...

Data Regression and Verification
Apply and Test the Configuration
Regressed results
y = 1.0065x - 0.1434
R² = 0.9578
10....

Data Regression and Verification
Apply and Test the Configuration
Regressed results
y = 1.0021x + 0.0037
R² = 0.9728
0.0...

Data Regression and Verification
Use In-Process
Screenshot taken after test completion (15 seconds low-energy beam, 20
se...

Use In-Process
Calculate basicity ratios in real time
Ex. B3: CaO/(SiO2+Al2O3)
Ex. B4: (CaO+MgO)/(SiO2+Al2O3)
Software...

Other Considerations
Larger data set is helpful
y = 1.186x - 7.8518
R² = 0.7655
38
39
40
41
42
43
44
45
46
47
48
38 40 42...

Other Considerations
Larger data set is helpful – more points to strengthen
the trendline
y = 1.0011x + 0.0356
R² = 0.765...

Other Considerations
Sample preparation
Data transfer from instrument to Operations/product
management system

Thank you for your time! Questions?
Alex Thurston
Applications Engineering Manager
Olympus Scientific Solutions Americas, ...

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