Sunlands Pure Technology

Mining to Concentrate to HPG – A Traceable, Environmentally Sustainable Supply Chain

From the mining of flake graphite to the production of contaminant free graphite concentrate and its refining to deliver HPG products, this end-to-end process represents a global secure, reliable, traceable and environmentally sustainable supply chain.

The Sunlands Pure process is uniquely capable of purifying Eastern Eyre Peninsula natural flake graphite to a purity of 99.9% graphitic carbon at the size fraction distribution of the concentrate product mix.

Sunlands Pure will deliver this critical material to key markets including manufacturers in the Li-ion battery, isostatic graphite and thermal energy storage market segments.

The Purification Process

High purity graphite (HPG) is produced utilising an environmentally benign alkaline-light acid process (ALA Process).

The ALA Process is a conventional proven process that delivers HPG at quality levels sufficient to meet the stringent standards of Tier 1 Lithium-ion anode and high-specification isostatic graphite which is used in advanced medical materials and defence industry.

The ALA Process treats the feedback with two primary processes:

      1.    caustic soda roast;
      2.    sulfuric acid rinse

At the end of these processes the resulting HPG is rinsed, dried in a conventional kiln and screened. Production is concluded once HPG is certified and packaged for market.

Benefits of the Sunlands Pure Process

Capable of meeting needs of diverse market segments including the Li-ion battery, isostatic graphite and thermal energy storage markets.

A continuous (not a batch) process capable of producing HPG at a far larger scale than currently available in China.

This proven process has three key advantages:

1.  Avoids the harsh chemical refining processes adopted
     in China and necessary to treat and refine feedstock      sourced from orebodies that include heavy metals and      other contaminants

2.  Highly scalable, capital light and capable of expansion      with very short lead times

3.  Achieved at the size fraction distribution of the      feedstock product mix from minesite processing      without any further degradation of particle size      ensuring the broadest market coverage

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