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Imperial engages M.Plan on Crater Lake scandium metallurgical test work

Published by , Editorial Assistant
Global Mining Review,

Imperial Mining Group Ltd has announced that M.Plan International Ltd, has been engaged to undertake Phase 2 metallurgical test work on the Crater Lake Project scandium mineralisation from the recently-discovered TG Zone.

M.Plan, based in Toronto, Canada, is a joint venture between metallurgical service group Dorfner ANZAPLAN GmbH (Germany) and Toronto-based mining consultancy Micon International Ltd.

The test work will be completed on two 100 kg bulk samples collected from TG Zone diamond drill core, representing the two mineralisation types encountered this past winter. Previous metallurgical work on Crater Lake mineralisation showed that 100% of the scandium is contained in two common iron silicate minerals; pyroxene and amphibole. Early results showed high recovery of scandium (83.6%) using simple and inexpensive magnetic concentration methods while rejecting 34.3% of the non-scandium bearing material. New test work will attempt to improve the previously encouraging scandium recoveries and increase the non-mineralised material rejection rate.

“The metallurgical test work is intended to optimise the already encouraging test results obtained from our Phase 1 work completed in 2018,” said Peter Cashin, Imperial’s President and Chief Executive Officer. “Based on the properties of pyroxene, olivine and amphibole, the target of the proposed test work will be to reject the major portion of olivine, which contains no scandium, from the bulk mineral concentrate, thereby significantly improving scandium recovery and gangue mineral rejection. This is the first step toward defining a full process flowsheet including hydrometallurgical treatment of the mineral concentrate to recover marketable scandium oxide product for scandium-aluminium alloy applications.”

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