About
Expert in metals processing and responsible project development. Available for due…
Services
Articles by Lyle
Activity
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Having a read of a paper for a comparative LCA for EV batteries today (Degen et al, Journal of Industrial Ecology 2024;1–16). Not nearly done, but it…
Having a read of a paper for a comparative LCA for EV batteries today (Degen et al, Journal of Industrial Ecology 2024;1–16). Not nearly done, but it…
Posted by Lyle Trytten
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One day I'm going to run out of the emotional energy I need to advocate for women to be on consulting teams, to be included in meetings, conference…
One day I'm going to run out of the emotional energy I need to advocate for women to be on consulting teams, to be included in meetings, conference…
Liked by Lyle Trytten
Experience
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Trytten Consulting Services
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Education
Volunteer Experience
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Critical Mineral Expert Advisory Group
International Energy Agency (IEA)
- Present 1 year
Trytten Consulting is privileged to be part of a group comprised of major mining, finance, EV OEM, geoscience and policy organizations providing advice to the IEA on critical minerals topics. Trytten Consulting Services has peer reviewed or contributed to a number of IEA reports in the topic area.
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Guest Lecturer
University of Alberta, Kings University
- Present 17 years
Education
Guest lecturer on the mining industry, sustainability, and process design topics.
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Board Member
Northeast Capital Industrial Association
- 4 years
Member of the board and executive committee, Vice-Chair. Collaborate with 20+ other industrial members to direct the work of the organization on issues affecting social license, environmental regulation, taxation, etc.
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Advisor
Nickel Institute
- 2 years
Member of the Strategic Planning Advisory Committee. Worked with global nickel industry leaders to steward the focus and efforts of this world-leading organization developing science and policy related to the use of nickel, its impact, and governmental policy issues. Consulted regularly with Sherritt's board representatives.
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Advisor
Cobalt Institute
- 1 year
Participated in a strategic review of functioning of the organization on behalf of the member companies.
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Chair, Nitrogen Air Issues Working Group; Co-chair Environment Committee
Fertilizer Canada
- 4 years
Ensured this key group of ammonia industry leaders was working on the most important issues including GHG policy development, and collaborated with them and institute staff on development of policy positions, messages, etc. Lobbied federal and provincial governments.
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President
Edmonton String Players Association
- 2 years 1 month
Arts and Culture
Ran volunteer non-profit support group for strings education in Edmonton Public School Board's Music Enrichment Program. Ensured compliance with government funding regulations, rewrote bylaws and practices, organized events.
Publications
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Overlooked Nickel and the Path to Market
PDAC 2023
Discussion of the keys to bringing unconventional nickel resources to market, using Giga Metals Turnagain project as an example. Review from the session chairs below. Contact me directly for a copy.
"Thank you very much for having made your presentation to the PDAC's Nickel Session, and for being gracious and illustrating your presentation with the projects of your competitors in the Cordillera.
We appreciate that you shared with the PDAC some of what you have learned in an admirable…Discussion of the keys to bringing unconventional nickel resources to market, using Giga Metals Turnagain project as an example. Review from the session chairs below. Contact me directly for a copy.
"Thank you very much for having made your presentation to the PDAC's Nickel Session, and for being gracious and illustrating your presentation with the projects of your competitors in the Cordillera.
We appreciate that you shared with the PDAC some of what you have learned in an admirable, wide-ranging career in the nickel business. And that you talked not only about the good stuff, you also warned geologists of the significance of the deleterious stuff that they may also discover. Thank you, Lyle!" -
Corefco Leach Residue Re-processing: Testwork and Commercial Considerations
Metallurgical Society of CIM
The Corefco ammonia leach nickel refinery treats Ni-Co mixed sulphides from the high-pressure acid leaching of Moa Bay nickel laterite. Due to the low iron content of the feed, the ammonia leach process generates a leach residue with ~10% Ni+Co. Since commissioning a leach residue pressure filtration circuit in 2002, this residue has been stockpiled, dried, and sold commercially. For several years, the residue was sold to nickel smelters overseas. In 2014, re-processing of the residue in…
The Corefco ammonia leach nickel refinery treats Ni-Co mixed sulphides from the high-pressure acid leaching of Moa Bay nickel laterite. Due to the low iron content of the feed, the ammonia leach process generates a leach residue with ~10% Ni+Co. Since commissioning a leach residue pressure filtration circuit in 2002, this residue has been stockpiled, dried, and sold commercially. For several years, the residue was sold to nickel smelters overseas. In 2014, re-processing of the residue in the high-pressure acid leach was tested. Lab test work was completed showing excellent extraction of the contained nickel and cobalt, and additional beneficial effects in the high-pressure acid leach circuit. A plant test in Moa confirmed the results, and preparation for shipment of the valuable leach residue for re-processing has begun. This paper outlines the test work and results, and some commercial considerations.
Other authors -
Learnings from Infrastructure Replacement within an Operating Refinery
Metallurgical Society of CIM
The Sherritt Fort Site nickel refinery and fertilizer plant has been operating continuously since 1954. The ammonia leach process uses ammonia and sulphuric acid, producing nickel and cobalt and an ammonium sulphate byproduct. One of the features of an ammonium sulphate based process is the aggressive nature of ammonium sulphate to concrete and structural steel. After six decades of operation, portions of the structural steel and concrete at the Sherritt facility have become degraded.…
The Sherritt Fort Site nickel refinery and fertilizer plant has been operating continuously since 1954. The ammonia leach process uses ammonia and sulphuric acid, producing nickel and cobalt and an ammonium sulphate byproduct. One of the features of an ammonium sulphate based process is the aggressive nature of ammonium sulphate to concrete and structural steel. After six decades of operation, portions of the structural steel and concrete at the Sherritt facility have become degraded. Infrastructure replacement programs started in earnest more than a decade ago with pipe racks and electrical infrastructure, and have now progressed into building steel. Replacing and repairing this infrastructure within the tight constraints of an operating plant poses several difficult challenges. This paper will outline the approach taken to accomplish this difficult work, and discuss key learnings from the ongoing program.
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Commercialization of the Acid Pressure Leaching of Chalcopyrite
ALTA Copper Conference 2002
A review of the state of the art and historical practices for acid pressure leaching of chalcopyrite concentrates for copper recovery, including considerations for commercialization (copper and byproduct recoveries and qualities, residue stability, capex and opex, markets, etc.) The paper illustrated that many of the "new" copper leach technologies being touted in the mid 1990s to mid 2000s were in fact not new, but recycled ideas from the past.
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Comparison of Direct Pressure Leaching with Atmospheric Leaching of Zinc Concentrates
Lead-Zinc 2000 Symposium as held at the TMS Fall Extraction & Process Metallurgy Meeting
Both pressure leaching of zinc concentrate, in an autoclave, and atmospheric leaching, in stirred tanks, have been employed in the expansion of zinc production at plants employing roast-leach-electrowin technology. These direct leaching methods result in the conversion of the sulphur in the feed to the elemental form, rather than to sulphur dioxide, decoupling zinc production from acid production. Atmospheric and pressure leaching methods are also readily implemented over a wide range of…
Both pressure leaching of zinc concentrate, in an autoclave, and atmospheric leaching, in stirred tanks, have been employed in the expansion of zinc production at plants employing roast-leach-electrowin technology. These direct leaching methods result in the conversion of the sulphur in the feed to the elemental form, rather than to sulphur dioxide, decoupling zinc production from acid production. Atmospheric and pressure leaching methods are also readily implemented over a wide range of production rates. In choosing the best technology for expansion, capital and operating costs, zinc recovery, byproduct quality and the compatibility of recycle streams with the existing refinery must be compared. Leach testwork with several zinc concentrates using both methods has been perfomed by Dinatec. Recent results are presented, along with a discussion of their implications for process selection.
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The Scale-up and Design of Pressure Hydrometallurgical Process Plants
JOM
Discussion of the commercial success of Sherritt/Dynatec designed hydrometallurgical plants and some of the reasons for these facilities performing exceptionally well in comparison to typical metallurgical startups as referenced by McNulty.
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Hydroprocessing of narrow-boiling gas oil fractions: dependence of reaction kinetics on molecular weight
Industrial and Engineering Chemistry Research
Novel work illustrating how the rate of reactions (hydrocracking, HDS, HDN) depend on the molecular weight (or molecular size) for oils, removing the need to consider false reaction orders like 1.5 that were commonly used in the industry to empirically describe the behaviour of oils, a complex blend of a large variety of actual molecules. Included substantial work on molecular characterization of different boiling fractions of coker gas oils.
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Estimation of hydrocracking of C-C bonds during hydroprocessing of oils
Fuel
A novel method of estimating hydrocracking performance for an oil was developed using a simple group-additivity method. Data from 13C n.m.r., simulated distillation analysis, density, and elemental analyses were used to calculate the average number of carboncarbon bonds per molecule of oil. Using an example set of hydroprocessed products from a coker gas oil, the percentage of carboncarbon bonds actually cracked was calculated from the number of carboncarbon bonds in the feed and the…
A novel method of estimating hydrocracking performance for an oil was developed using a simple group-additivity method. Data from 13C n.m.r., simulated distillation analysis, density, and elemental analyses were used to calculate the average number of carboncarbon bonds per molecule of oil. Using an example set of hydroprocessed products from a coker gas oil, the percentage of carboncarbon bonds actually cracked was calculated from the number of carboncarbon bonds in the feed and the products. The method was not sensitive to effects from catalytic reactions, unlike methods based on the reduction in molecular weight or boiling range.
Other authors
Patents
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Recovery of nickel, cobalt, iron, silica, zinc and copper from laterite ore by sulfuric acid leaching
Issued US 7387767
Patenting the process developed for the Ambatovy nickel project, with important improvements from the prior art of HPAL-Sulphide Precipitation processing.
A process for recovering nickel and cobalt values from nickel- and cobalt-containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite ore is leached as a slurry in a pressure acid leach containing an excess…Patenting the process developed for the Ambatovy nickel project, with important improvements from the prior art of HPAL-Sulphide Precipitation processing.
A process for recovering nickel and cobalt values from nickel- and cobalt-containing laterite ores as an enriched mixed nickel and cobalt sulphide intermediate and for producing nickel and cobalt metal from the nickel and cobalt sulphide intermediate. The laterite ore is leached as a slurry in a pressure acid leach containing an excess of aqueous sulphuric acid at high pressure and temperature, excess free acid in the leach slurry is partially neutralized to a range of 5 to 10 g/L residual free H2SO4 and washed to yield a nickel- and cobalt-containing product liquor, the product liquor is subjected to a reductant to reduce any Cr(VI) in solution to Cr(III), the reduced product liquor is neutralized to precipitate ferric iron and silicon at a pH of about 3.5 to 4.0, and the neutralized and reduced product liquor is contacted with hydrogen sulphide gas to precipitate nickel and cobalt sulphides. The precipitated nickel and cobalt sulphides can be leached in a water slurry in a pressure oxidation leach, the leach solution subjected to iron hydrolysis and precipitation, the iron-free solution contacted with zinc sulphide to precipitate copper, the iron- and copper-free solution subjected to zinc and cobalt extraction by solvent extraction to produce a nickel raffinate, the nickel raffinate contacted with hydrogen gas to produce nickel powder and the cobalt strip solution from the solvent extraction step contacted with hydrogen gas to produce cobalt powder.Other inventors
More activity by Lyle
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Good infographic from the #NickelInstitute below. Very timely since I saw some great looking NMC (NickelManganeseCobalt) powered #EVs at the…
Good infographic from the #NickelInstitute below. Very timely since I saw some great looking NMC (NickelManganeseCobalt) powered #EVs at the…
Liked by Lyle Trytten
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Never forget the end goal… why I don’t take roles just for the money or the title. 24 years ago today I joined INCO as a utility labourer at…
Never forget the end goal… why I don’t take roles just for the money or the title. 24 years ago today I joined INCO as a utility labourer at…
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