A large scale closed circuit test-work campaign was undertaken by the minerals processing laboratory BGRIMM. This is one of China’s key research facilities and has world leading expertise in graphite extraction. BGRIMM also has a manufacturing division that is the main supplier of attrition milling and froth flotation equipment to the Chinese Graphite Industry. Consequently, BGRIMM has unrivalled experience in laboratory testing and the specification of flowsheets & equipment for industrial scale graphite production. The sample selected for the BGRIMM testwork was high-grade surface ore (32% TGC), from the area where mining is planned to commence.
This sample was very similar to the Surface Composite Sample tested at Nagrom Laboratories in Perth in July 2016. After due allowance for fines recovery differences, the BGRIMM and Nagrom results were very similar.
However, the Company decided to moderate the Life of Mine ratios for Super Jumbo, Jumbo and Large flake sizes in order to mitigate potential process risk. The yield of +500um flakes is still the highest in the peer group. It is notable that the fresh material makes up more than 80% of the Mining Reserve.
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