iron ore 2011 perth real-time image analysis of iron ore cores and drill chips to complement...
TRANSCRIPT
IRON ORE
2011PERTH
REAL-TIME IMAGE ANALYSIS OF IRON ORECORES AND DRILL CHIPS
TO COMPLEMENT SPECTRAL MEASURES
Thomas BELLIGOÏErick RAMANAIDOU
& Eric PIRARD
IRON ORE
2011PERTH
• Liege City– The cradle of coal mining, steelmaking and zinc metallurgy in
Europe...
• Liege University– A major research partner in Belgium– 4000 researchers; 1800 PhD students– 500+ professors– Large network of spin off companies ( > 70)
About LiegeA millenary city
IRON ORE
2011PERTH
– GeMMe• Minerals Engineering, Materials & Environment
– 3 research units; 40+ researchers» Building materials» Minerals engineering & recycling» Georesources & Geo-Imaging
About Us
GeMMe operates on the characterization, valorization, transformation, use and recycling of mineral materials at any stage of their life cycle.
A long tradition in Georesources Engineering
IRON ORE
2011PERTH
• Geometallurgy• Core Scanning
– RGB Imaging– µSpectral Imaging
• Chips Scanning– 2D– 3D
• Conclusions
Synopsis
IRON ORE
2011PERTH
• Needs for Computer Aided Perception– Seeing beyond human vision
• Spectral sensing of molecules (IR, Raman,…)• Spectral sensing of elements (XRF, LIBS, …)
– Measuring beyond human capabilities• Modal analysis of minerals• Textural information
Exploration Geology
IRON ORE
2011PERTH
– In Situ Mapping• Field work• Core / Chips scanning• Spatial Inference (Geostatistics)
– Prediction of Ore Performance• Modal analysis of minerals• Porosity• Textural information
– Crystal size– Fracturation– Banding– …
Geometallurgy
IRON ORE
2011PERTH
• Spectral sensing– HyLogger
Core Scanning
Huntington et al., 2006
IRON ORE
2011PERTH
• Spectral sensing– HyLogger
• RGB imaging– Dalsa 3CCD Linear
• Calibrated colour– Basler 1CCD Area
• JPG archive– Resolution 120µm– Compressed tints– Non-uniform illumination
Core Scanning
IRON ORE
2011PERTH
• Spectral sensing– HyLogger
• RGB imaging– Dalsa 3CCD– Basler 1CCD
• µSpectral imaging– SiSuCheMa
• 239 bands• 1100 nm -2500 nm• 30 µm resolution
Core Scanning
IRON ORE
2011PERTH
• RGB imaging
• µSpectral imaginga) ISODATA (4 clusters)b) Max Likelihood
Core Image Analysis
Marra Mamba Unsupervised Supervised
Unsupervised Supervised
IRON ORE
2011PERTH
• 2D Particle Sizing– Occhio Zephyr
• 50 µm 3 mm• Backlighting
– 390 nm
Drill Chips Scanning
• At line imaging• No sample preparation
IRON ORE
2011PERTH
• 2D Particle Sizing– Occhio Zephyr
• 50 µm 3 mm• Backlighting
– 390 nm
• 3D Particle Sizing– MiCa Prototype
• 50 µm 3 mm• Laser
– 671 nm
Drill Chips Scanning
• At line imaging• No sample preparation
IRON ORE
2011PERTH
• 3D Particle Size & Shape
Drill Chips Image Analysis
El ~=0.4 / Fl~=0.25 El ~=0.3 / Fl~=0.15
IRON ORE
2011PERTH
– Imaging• is essential to gain more pertinent data
for a geometallurgical evaluation of the deposit– Selected spectral band imaging
• has to be developed for ideal sensingof mineral/lithological mapping
– 3D scanning of chips• delivers interesting geotechnical information
– Techniques need to be optimized• for real-time use in exploration
Conclusions & Perspectives
IRON ORE
2011PERTH
Thank You