Producing Clean Coal from Western Canadian Coal Fields...
Transcript of Producing Clean Coal from Western Canadian Coal Fields...
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Canadian Carbonization
Research Association
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Producing Clean Coal from
Western Canadian Coal Fields
using the Water-based Roben Jig
Process
- 2018 Update -
Presenters: Dr. Ross Leeder and Heather Dexter
Authors: Melanie Mackay, Ross Leeder, Heather Dexter,
Maria Holuszko, Louis Giroux, Daryl Thomas
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Canadian Carbonization
Research Association
www.cancarb.ca
CCRA and Geoscience BC
• Canadian Carbonization Research
Association (CCRA) is a cooperative
industrial research group – coal, steel,
cokemaking, CanmetENERGY
• Geoscience BC is a BC government funded
group that financially supports joint work on
exploration and resource assessment in BC
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Canadian Carbonization
Research Association
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BACKGROUND
CCRA/GEOSCIENCE PROJECT
ROBEN JIG PROCEDURE
RESULTS OF 2017 PROGRAM
CONTINUING WORK
PRESENTATION OUTLINE
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Canadian Carbonization
Research Association
www.cancarb.ca
BACKGROUND
CCRA/GEOSCIENCE PROJECT
ROBEN JIG PROCEDURE
RESULTS OF 2017 PROGRAM
CONTINUING WORK
PRESENTATION OUTLINE
![Page 5: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/5.jpg)
Canadian Carbonization
Research Association
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• Coking coal is cleaned in processing
plants mainly using density separation –
(fine particles use flotation).
• The differences in density between lighter
coal particles and heavier minerals, stones,
etc, allows the production of clean low ash
coal.
CLEANING COAL - DENSITY
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Canadian Carbonization
Research Association
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• Lab testing and pilot scale processing of
raw coal is used to determine the coal
processing and clean coal quality
properties.
• This is done using float and sink baths or
in small dense-media pilot plants with
froth flotation for the fines.
CLEANING COAL - DENSITY
![Page 7: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/7.jpg)
Canadian Carbonization
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• Traditional method for washing small
scale samples is the Float/Sink Method –
ASTM D4371
• Samples are evaluated from exploration,
pit and plant, etc.
• Samples are screened into different size
ranges similar to processing plants.
FLOAT/SINK – ORGANIC CHEMICALS
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Float/Sink Liquids include the following:
• Methylene Bromide (SG 2.47)/Bromoform
(SG 2.89)
• Perchloroethylene (SG 1.62)
• VMP Naptha (SG 0.75)
• Alternate Liquid: Halocarbon (SG 1.70)
FLOAT/SINK – ORGANIC CHEMICALS
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Canadian Carbonization
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FLOAT/SINK – ORGANIC CHEMICALS
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Canadian Carbonization
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• Easy to achieve Specific Gravity
fractions
• Coal readily wets with organic
liquids
• Inert towards shales
• Efficient and repeatable results
ADVANTAGES OF FLOAT SINKING
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DIS-ADVANTAGES OF FLOAT SINKING
• Heavy loads/repetition of large samples
• Disposal of contamined coal/reject
• Expensive: Bromoform ($83/litre),
Halocarbon ($240/litre)
• Health and Environmental issues
• Personal protection equipment and
specifically designed work areas.
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Canadian Carbonization
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FLOAT/SINK – ORGANIC CHEMICALS
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DIS-ADVANTAGES
• Coal quality may be impacted:
– Misplaced material making float/sink
results difficult to interpret
– Coking coal quality – thermal
softening properties and coking
properties can be impacted.
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Fine Coke ~21%
IMPACT OF PERCHLOROETHYLENE ON COKE
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• Heavy salts – lab scale
• Water based washing
o Lab scale dense-media/flotation
o Pilot scale dense-media/flotation
o Other - i.e. Roben Jig
ALTERNATIVES TO ORGANIC CHEMICALS
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ALTERNATIVES TO ORGANIC CHEMICALS
• Birtley Coal Testing operated a coal washing
dense-media pilot plant from the 1970’s until
the early 2000’s, which could produce bulk
samples for pilot coke oven testing.
• Since the mid 2000’s the only alternatives
have been much smaller dense-media
equipment at Teck, SGS and Hazen.
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Canadian Carbonization
Research Association
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BACKGROUND
CCRA/GEOSCIENCE PROJECT
ROBEN JIG PROCEDURE
RESULTS OF 2017 PROGRAM
CONTINUING WORK
PRESENTATION OUTLINE
![Page 18: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/18.jpg)
Canadian Carbonization
Research Association
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CCRA - Geoscience BC Joint Research
1. Purchased a Lab Sized Roben Jig and
operated at Birtley Coal Testing.
2. Tested 4 coals from BC (SEBC & NEBC)
3. Each coal float/sink and Jig washed
4. Coal analyses: chemical and physical,
thermal softening, petrography
5. Coking quality: CanmetENERGY sole-
heated oven
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Canadian Carbonization
Research Association
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ROBEN JIGS
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Canadian Carbonization
Research Association
www.cancarb.ca
CCRA - Geoscience BC Joint Research
1. Purchased a Lab Sized Roben Jig and
operated at Birtley Coal Testing
2. Tested 4 coals from BC (SEBC & NEBC)
3. Each coal float/sink and Jig washed
4. Coal analyses: chemical and physical,
thermal softening, petrography
5. Coking quality: CanmetENERGY sole-
heated oven
![Page 21: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/21.jpg)
Canadian Carbonization
Research Association
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COAL SOURCES - ROBEN JIG PROGRAM
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Canadian Carbonization
Research Association
www.cancarb.ca
CCRA - Geoscience BC Joint Research
1. Purchased a Lab Sized Roben Jig and
operated at Birtley Coal Testing.
2. Tested 4 coals from BC (SEBC & NEBC)
3. Each coal float/sink and Jig washed
4. Coal analyses: chemical and physical,
thermal softening, petrography
5. Coking quality: CanmetENERGY sole-
heated oven
![Page 23: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/23.jpg)
Canadian Carbonization
Research Association
www.cancarb.ca
CCRA - Geoscience BC Joint Research
1. Purchased a Lab Sized Roben Jig and
operated at Birtley Coal Testing.
2. Tested 4 coals from BC (SEBC & NEBC)
3. Each coal float/sink and Jig washed
4. Coal analyses: chemical and physical,
thermal softening, petrography
5. Coking quality: CanmetENERGY sole-
heated oven
![Page 24: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/24.jpg)
Canadian Carbonization
Research Association
www.cancarb.ca
CCRA - Geoscience BC Joint Research
1. Purchased a Lab Sized Roben Jig and
operated at Birtley Coal Testing.
2. Tested 4 coals from BC (SEBC & NEBC)
3. Each coal float/sink and Jig washed
4. Coal analyses: chemical and physical,
thermal softening, petrography
5. Coking quality: CanmetENERGY sole-
heated oven
![Page 25: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/25.jpg)
Canadian Carbonization
Research Association
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GOALS FOR 2017 STUDY
1. Confirm the applicability of the Jig
for use in cleaning small mass
exploration samples
2. Assess Jig methodology
3. Spread the word! (publish)
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Canadian Carbonization
Research Association
www.cancarb.ca
BACKGROUND
CCRA/GEOSCIENCE PROJECT
ROBEN JIG PROCEDURE
RESULTS OF 2017 PROGRAM
CONTINUING WORK
PRESENTATION OUTLINE
![Page 27: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/27.jpg)
Canadian Carbonization
Research Association
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ROBEN JIGS
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Canadian Carbonization
Research Association
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ROBEN JIG
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Canadian Carbonization
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ROBEN JIG
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Canadian Carbonization
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ROBEN JIG
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Canadian Carbonization
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ROBEN JIG
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Canadian Carbonization
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ROBEN JIG
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LAB TESTS FROM 4 SAMPLES
1. Coal chemical analysis of each
fraction: Ash, Volatile Matter, moisture,
and selected petrography and FSI
2. Chemical, Physical, Thermal
Rheological and Petrographic results
of clean coal composites, including
detailed Ash elemental composition
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Canadian Carbonization
Research Association
www.cancarb.ca
BACKGROUND
CCRA/GEOSCIENCE PROJECT
ROBEN JIG PROCEDURE
RESULTS OF 2017 PROGRAM
CONTINUING WORK
PRESENTATION OUTLINE
![Page 35: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/35.jpg)
Canadian Carbonization
Research Association
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RESULTS – ROBEN JIG STUDY
Samples from Float/Sink and Jig separations
were analyzed and compared for:
1. Density separation characteristics
2. Coal proximate (ash, VM), chemical (S,
Cl, etc), physical, thermal softening,
ash chemistry and petrography
3. Clean coal composite coking properties
![Page 36: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/36.jpg)
Canadian Carbonization
Research Association
www.cancarb.ca
RESULTS – ROBEN JIG STUDY
Samples from Float/Sink and Jig separations
were analyzed and compared for:
1. Density separation characteristics
2. Coal proximate (ash, VM), chemical (S,
Cl, etc), physical, thermal softening,
ash chemistry and petrography
3. Clean coal composite coking properties
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Separation Density
and Wt Recovered
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Canadian Carbonization
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ROBEN JIG Clean Coal Ash
and Wt Recovered
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Canadian Carbonization
Research Association
www.cancarb.ca
RESULTS – ROBEN JIG STUDY
Samples from Float/Sink and Jig separations
were analyzed and compared for:
1. Density separation characteristics
2. Coal proximate (ash, VM), chemical (S,
Cl, etc), physical, thermal softening, ash
chemistry and petrography
3. Clean coal composite coking properties
![Page 40: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/40.jpg)
Canadian Carbonization
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COAL PROXIMATE COMPARISONS
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Canadian Carbonization
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COAL CHEMISTRY AND PHYSICALS
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CHLORINE RESULTS
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THERMAL RHEOLOGY
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RHEOLOGY RESULTS
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Canadian Carbonization
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CLEAN COAL PETROGRAPHY
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CONCLUSIONS – FOR F/S VS JIG
1. Coal chemical analysis were very similar
for all 4 samples: Ash, Sulfur, Volatile
Matter, Fixed Carbon, FSI, ash Base/Acid
Ratio
2. Petrographic results very similar
3. The Chlorine content of the F/S samples
was higher (one very much higher!)
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Canadian Carbonization
Research Association
www.cancarb.ca
RESULTS – ROBEN JIG STUDY
Samples from Float/Sink and Jig separations
were analyzed and compared for:
1.Density separation characteristics
2.Coal proximate (ash, VM), chemical (S,
Cl, etc), physical, thermal softening, ash
chemistry and petrography
3.Clean coal composite coking properties
![Page 48: Producing Clean Coal from Western Canadian Coal Fields ...cdn.geosciencebc.com/pdf/Presentations/2017-013_CoalSMART_20… · Canadian Carbonization Research Association CCRA - Geoscience](https://reader034.fdocuments.net/reader034/viewer/2022042805/5f5c61f99a91902c51134670/html5/thumbnails/48.jpg)
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CanmetENERGY SOLE-HEATED OVEN
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SOLE-HEATED OVEN COKE
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SOLE-HEATED COKE – CHEMISTRY/PHYSICAL
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SOLE-HEATED COKE – MICROSCOPIC ANALYSIS
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SOLE-HEATED OVEN RESULTS
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SOLE-HEATED COKE – REACTIVITY/CSR
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SOLE HEATED OVEN COKE CSR RESULTS
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CSR RESULTS – JIG vs F/S
• Roben Jig CSRs were expected to be
higher than the F/S treated coal since
PCE has been know to decrease the
CSR of exposed coals.
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CSR RESULTS – JIG vs F/S
• In addition, the coal base/acid ratio or the
total alkaline ash content of the coals were
on average the same for the jig vs the F/S
samples – implying both coals could have
the same CSR, barring other factors.
• These results suggest some other factor is
impacting the jig clean coal CSR.
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WHY POORER CSR FOR JIG vs F/S?
The Jig is an imperfect separator and higher
ash particles can be misplaced to the clean
coal – ash composition may be the difference.
There may be tiny rock fragments mixed with
the clean coal that results in weaker than
expected coke.
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WHY POORER CSR FOR JIG vs F/S?
From coke quality perspective, need to
fine tune the Jig methodology
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BACKGROUND
CCRA/GEOSCIENCE PROJECT
ROBEN JIG PROCEDURE
RESULTS OF 2017 PROGRAM
CONTINUING WORK
PRESENTATION OUTLINE
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FURTHER WORK – 2018 Update
1.2018 Funding has been received from
CCRA and Geoscience BC with support
from both Birtley Coal Testing and Teck
2.One coal will be used to fine-tune the
Roben Jig methodology – Teck seam
sample.
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FURTHER WORK – 2018 Update
3. Future work could also include:
• Test a larger capacity jig
• Test other liquids
• Determine what happens when
coal and perchloroethylene come
into contact
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The authors would like to acknowledge
the funding and support for this study
from CanmetENERGY, CCRA, Geoscience
BC, Glencore Canada, Birtley Coal Testing
and
Teck Resources.
ACKNOWLEDGEMENTS
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Thank you for you
attention
Questions?