ALBION PROCESS FOR TREATMENT OF REFRACTORY ORES Duncan Turner (Core - - PowerPoint PPT Presentation

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albion process for treatment of refractory ores
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ALBION PROCESS FOR TREATMENT OF REFRACTORY ORES Duncan Turner (Core - - PowerPoint PPT Presentation

Mar 01, 2023 486 likes •596 views

ALBION PROCESS FOR TREATMENT OF REFRACTORY ORES Duncan Turner (Core Resources) Mike Hourn (Xstrata Technology) 1 Presentation Topics Overview of Albion Process Fine Grinding - IsaMill Sulphide Oxidation - Albion Process

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ALBION PROCESS FOR TREATMENT OF REFRACTORY ORES

Duncan Turner (Core Resources) Mike Hourn (Xstrata Technology)

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Presentation Topics

  • Overview of Albion Process
  • Fine Grinding - IsaMill
  • Sulphide Oxidation - Albion Process
  • Commercial Plant - Flowsheet & Equipment
  • Capital & Operating Costs
  • Project Updates
  • Project Development Program
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Albion Process Overview

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Albion Process Overview

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  • Combination of Fine Grinding and Atmospheric Oxidative Leaching

to breakdown sulphide minerals (e.g. pyrite) to make refractory gold available for cyanide leaching

Stirred Mills Feed P80 ~75 µm Product P80 10-12 µm Atmospheric Pressure Temperature ~95oC Oxygen Injection ~20-30 hours

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Albion Process Overview

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  • Leaching of sulphides minerals often yield by-products and precipitates that

passivate or blind the mineral surface as the minerals dissolve.

  • Passivation normally complete when precipitate layer is 2-3 µm thick.
  • The combination of fine grinding and Albion Process leach conditions overcomes

passivation of mineral surfaces by precipitates allowing sulphide oxidation to continue to the desired extent

Unleached 9 micron particle Leached Particle with over 96 % volume dissolution

Temperature and pH regime of Neutral Albion Process leach results in low density precipitates that passivate slowly Mineral particle size of P80 8-12 µm prevents passivation

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Albion Process Overview

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  • Developed in 1994 originally by MIM Holding Limited
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Albion Process Overview

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  • MIM Holding focused on own projects with Albion Process a strategic technology

to their gold business and project acquisition opportunities/targets

  • 2004 - Xstrata PLC bought MIM Holdings with Xstrata more involved in base

metal projects

  • 2005 - Albion Process launched by Xstrata Technology with the technology then

available outside of Xstrata Group

  • 2005 - Core Resources became global marketing agent for Albion Process
  • Late 2005 - first licence issued for Las Lagunas Project
  • Late 2006 - second licence issued for Certej Project
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Albion Process Overview

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  • Process is patented worldwide
  • Australian Patent No. 700850 (Acid Albion Process)
  • Australian Patent No. 744356 (Neutral Albion Process)
  • Two licenses issued
  • One plant under construction to be commissioned early 2011
  • Other projects in advanced stages of testing and engineering

Las Lagunas Project Dominican Republic

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Albion Process Overview

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  • Xstrata Technology are the technology providers for Albion Process

equipment

  • Albion Process Reactor including design and supply of mechanically

agitated modular and field erected tanks

  • Oxygen injection technology (HyperSparge)
  • Process control, instrumentation and automation
  • Suppliers of other technologies:
  • Located in Brisbane, Australia
  • www.xstratatech.com
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Albion Process Overview

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  • Core Resources Pty Ltd - global marketing agents
  • Testwork conducted at hrltesting (Brisbane, only accredited lab)

www.coreresources.com.au www.albionprocess.com www.hrltesting.com