iron ore 2015 - optimized process control in iron ore via ... · optimised process control in iron...
TRANSCRIPT
Optimised Process Control in Iron Ore via Online Analysis of Light Elements
Iron Ore 2015, PerthLauri Köresaar
Application Specialist- Analysers
© Outotec – All rights reserved
If you can measure ityou can control it
© Outotec – All rights reserved
Elemental analysis at a reverse flotation plantRougher flotation React to head grade changes Monitor operation of rougher & cleaner banks Monitor recovery & Fe losses to tailings
Final concentrate & additive mixing Requires measurement of
Si, Mg, Ca & C
© Outotec – All rights reserved
Pelletizing plant
© Outotec – All rights reserved
On-line elemental analysis techniques
•XRF•XRD
•PGNAA•NMR
•LIBS
© Outotec – All rights reserved
XRF SiO2 analysis
R² = 0.8975
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
53.00 54.00 55.00 56.00 57.00 58.00 59.00 60.00
SiO
2 (%
)
Fe (%)
SiO2 vs. Fe
© Outotec – All rights reserved
Laser-Induced Breakdown Spectroscopy
© Outotec – All rights reserved
Optical Emission Spectroscopy
Emission Line Produced!Carbon line 193 nm
© Outotec – All rights reserved
LIBS analyser principle
© Outotec – All rights reserved
Fe flotation concentrate spectrum
© Outotec – All rights reserved
Sample introduction
© Outotec – All rights reserved
© Outotec – All rights reserved
Feasibility study
© Outotec – All rights reserved
Fe concentrate feasibility studySiO2 (%) Al2O3 (%) Fe (%)
4.82 2.09 59.233.15 1.62 59.103.66 2.04 57.883.05 1.22 59.834.28 1.22 59.243.20 1.21 60.166.46 1.56 58.623.49 2.26 58.566.19 1.92 55.274.21 3.34 57.543.30 2.40 57.905.03 2.04 58.333.57 2.04 58.683.70 1.76 58.472.87 1.75 58.193.40 1.30 59.783.89 1.74 59.403.67 1.37 59.07
Min 2.87 1.21 55.27Max 6.46 3.34 60.16
© Outotec – All rights reserved
SiO2 Feasibility Results
R² = 0.8996
2
3
4
5
6
7
2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7Pred
icte
d Va
lue
(%)
Laboratory Assay (%)
SiO2
2
3
4
5
6
7
SiO
2 (%
)
Time
SiO2
Relative σ = 7.9%Absolute σ = 0.3%
© Outotec – All rights reserved
Al2O3 Feasibility Results
R² = 0.9495
11.5
22.5
33.5
4
1 1.5 2 2.5 3 3.5 4
Pred
icte
d Va
lue
(%)
Laboratory Assay (%)
Al2O3
11.5
22.5
33.5
4
Al2
O3
(%)
Time
Al2O3
Relative σ = 6.2%Absolute σ = 0.1%
© Outotec – All rights reserved
Fe Feasibility Results
R² = 0.8108
55
56
57
58
59
60
61
55 56 57 58 59 60 61 62
Pred
icte
d Va
lue
(%)
Laboratory Assay (%)
Fe
55
56
57
58
59
60
61
Fe (%
)
Time
Fe
Relative σ = 0.8%Absolute σ = 0.5%
© Outotec – All rights reserved
Questions?