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Imperial Mining update on SGS Metallurgical Test Lab

Mining News - Published on Mon, 02 Jul 2018

Image Source: GlobeNewswire
Imperial Mining Group Ltd announced that an update on the results of the mineralogical study and Phase I scoping mineral processing programs recently completed at the SGS Metallurgical Test Lab in Lakefield, Ontario, Canada.

Mineralogical studies of a composite core sample collected from the property indicates that scandium is primarily hosted by two common iron silicate minerals. The Phase I Mineral Processing scoping program completed on the core sample showed that a high-quality scandium mineral concentrate can be produced by using magnetic separation techniques.

Mr Peter Cashin, Imperial’s President & Chief Executive Officer said that “These early test results are encouraging in that they show that a clean, scandium-bearing mineral concentrate can be produced using inexpensive magnetic concentration techniques.” Mr Cashin added that “Our metallurgical team will now strive to achieve our ultimate objective of reducing potential mined material to be shipped to a processing facility by at least half while maintaining a high degree of scandium recovery. We continue to firmly believe that Crater Lake project represents an important alternative, primary scandium supply source to serve expanding western markets.”

The property consists of 57 contiguous claims covering approximately 27.9 km2 and is located approximately 200 km east northeast of Schefferville, Québec. Property rights were transferred to Imperial from Peak Mining Corporation, a private company, in a rollover transaction completed in December 2017.

Phase I Mineralogical and Metallurgical Test Results
QEMSCAN, Electron Microprobe and X-ray Diffraction analyses were completed on a Master Composite sample and 11 Drill Core samples from Crater Lake. The mineralogical study showed that the sample consists primarily of pyroxene, olivine and amphibole. Most of the scandium is hosted by paramagnetic pyroxene and amphibole which should be amenable to low cost magnetic separation technique in producing a mineral concentrate. The purpose of this work is to reject as much of the non-scandium mineralized component of the host ferrosyenite intrusive rock and reducing the volume of material to be shipped to a downstream scandium processing plant.

The Phase I mineral processing program completed at SGS, Lakefield evaluated a small number of pre-concentration techniques to produce a mineral concentrate. These included gravity separation, low-intensity magnetic separation and wet high-intensity magnetic separation. The non-optimized magnetic separation tests achieved 66% scandium recovery to 46% mass pull to mineral concentrate, shy of our targeted 50% rejection and 80-85% scandium recovery.

Mineralogical study of scandium mineralization is primarily comprised of pyroxene (37.2%) and olivine (26.3%) with moderate amounts of amphibole (12.6%), K-feldspar (9.9%) and minor proportions of plagioclase (3.6%), titanomagnetite (Ti-Mgt) (4.4%), britholite (1.9%), zircon (1.8%), and ilmenite (0.8%).

The Electron Microprobe Analysis and QEMSCAN deportment data revealed that scandium is hosted primarily by pyroxene and to a lesser extent the amphiboles in all the samples tested. The iron concentration between the various silicates and oxides was variable. The Fe-deportment illustrates that approximately 52.2% of it is contributed from the olivine, 29.3% from the pyroxene, 13.1% from the amphiboles, 4.2% from the titanomagnetite, and 2.7% from the ilmenite.

Phase II mineral processing tests were recently begun at SGS Lakefield. The program envisaged a combination of a low intensity magnetic separation and a wet high intensity magnetic separation steps. This should improve scandium recovery while minimizing mass pull to concentrate. It is anticipated that this work will be completed by mid-July.

The technical content in this press release was provided and certified by Dr Yemi Oyediran, P. Eng, Imperial's Manager, Metallurgical Development, a Metallurgist and Qualified Person as defined by NI 43-101.

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Posted By : Joykumar Irom on Mon, 02 Jul 2018
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