Lyle Trytten

Lyle Trytten

Edmonton, Alberta, Canada
3K followers 500+ connections

About

Expert in metals processing and responsible project development. Available for due…

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Articles by Lyle

Activity

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Experience

  • Trytten Consulting Services

    Edmonton, Canada Area

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    Edmonton, Alberta, Canada

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    Vancouver, Canada Area

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    Fort Saskatchewan, Alberta

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    Fort Saskatchewan

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    Fort Saskatchewan, AB, Canada

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    Fort Saskatchewan, AB, Canada

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    Fort Saskatchewan, AB, Canada

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    Leonora, Western Australia

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    Fort Saskatchewan, AB, Canada

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    Fort Saskatchewan, AB, Canada

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    Edmonton, Canada Area

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    Edmonton, AB, Canada

Education

Volunteer Experience

  • International Energy Agency (IEA) Graphic

    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.

  • Guest Lecturer

    University of Alberta, Kings University

    - Present 17 years

    Education

    Guest lecturer on the mining industry, sustainability, and process design topics.

  • Northeast Capital Industrial Association  Graphic

    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.

  • Nickel Institute Graphic

    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.

  • Cobalt Institute Graphic

    Advisor

    Cobalt Institute

    - 1 year

    Participated in a strategic review of functioning of the organization on behalf of the member companies.

  • Fertilizer Canada Graphic

    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.

  • 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

  • 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.

    Other authors
  • 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.

    Other authors
    • R.M. Berezowsky
    See publication
  • 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.

    Other authors
    • K.R. Buban
    • M.J. Collins
    • I.M. Masters
    See publication
  • 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.

    Other authors
    • F. Campbell
    • W.D. Vardill
    See publication
  • 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.

    Other authors
    • M.R. Gray
    • E.C. Sanford
    See publication
  • 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 carboncarbon bonds per molecule of oil. Using an example set of hydroprocessed products from a coker gas oil, the percentage of carboncarbon bonds actually cracked was calculated from the number of carboncarbon 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 carboncarbon bonds per molecule of oil. Using an example set of hydroprocessed products from a coker gas oil, the percentage of carboncarbon bonds actually cracked was calculated from the number of carboncarbon 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
    • M.R. Gray
    See publication

Patents

  • 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
    • I.M. Masters
    • M.J. Collins
    • F. Campbell
    See patent

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