Lithium Processing

Metallurgical Innovation

Metallurgical Test Efforts

Driven to be more environmentally friendly and provide higher recoveries

ROCK TO PRODUCT

Goals

The metallurgical test work being undertaken by United Lithium has several goals

  • More environmentally friendly – reduce energy and water consumption, recycle reagents, reduce reaction temperatures
  • Robust – putting together a single process to handle spodumene and petalite feed material from multiple sources
  • A complete solution that goes from rock to finished lithium carbonate or lithium hydroxide

Successes to date

  • Produced a higher grade spodumene concentrate than typical
  • Better recovery of lithium in production of lithium carbonate than typical
  • Reduction in temperatures and reagent quantities than typical

Near-term work

  • Production of lithium hydroxide at bench scale
  • Innovation in calcination and chemical roasting
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2022 Planning

  • Pilot plant running mineralization from multiple projects, primarily from North America and Europe
  • Assessment and optimization of ancillary minerals (quartz, feldspar, micas, etc)
  • Test further increase in efficiencies of concentrate production by optimization using dense media separation (DMS), radiometric sorting, X-ray sorting, and optical sorting

Spodumene / Petalite Concentrate

Update on Innovative Flotation Test Work For Spodumene Recovery

  • Up to 8.39% Li2O produced in flotation concentrate testing
  • Up to 70.3% of the Li2O in the tested pegmatite recovered in flotation testing
  • Spodumene prices registered an 86% increase in September (FOB Australia) against a backdrop of tight raw material supply and surging chemical prices in China
Calcined flotation concentrate obtained from test # 1. Click to view larger image.
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LITHIUM CARBONATE TESTING

Achieves higher than 99% pure lithium carbonate with A LEACH recovery exceeding 98%

Analysis of the process solutions related with Li2CO3 precipitation tests

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Assay of the final lithium carbonate product

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  • Higher than 99% pure lithium carbonate achieved
  • Over 98% Li2O leach recovered
  • Approximately 99% Li2O recovered from impurity removal stages
  • Test work to commence shortly on a direct lithium hydroxide from spodumene concentrate process
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Finland

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Sweden

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Canada

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