IronRidge reports 'exceptional' test results

BRISBANE-based IronRidge Resources has received "exceptional" metallurgical test results from the Ewoyaa pegmatite target, part of its greater Cape Coast lithium project in Ghana.
IronRidge reports 'exceptional' test results IronRidge reports 'exceptional' test results IronRidge reports 'exceptional' test results IronRidge reports 'exceptional' test results IronRidge reports 'exceptional' test results

IronRidge drilling at its Cape Coast lithium project in Ghana

Staff reporter

The testwork, completed on 17 diamond drill core composites from across the deposit for a total of 427kg of material, confirmed spodumene as the dominant lithium mineral.
The tests achieved coarse grained pegmatite with concentrate grades consistently above 6% lithium oxide, the current industry standard, and recoveries up to 85% using heavy liquid separation (HLS) beneficiation at a coarse 6.3mm crush.
It also determined low contaminant levels in the coarse pegmatite concentrates, which were generally below the nominal 1% Fe2O3 preferred by customers.
At the same crush, fine grained pegmatite samples achieved HLS recoveries up to 60% and concentrate grades of 5.12-7.23% Li2O.
CEO Vincent Mascolo said the testwork demonstrated the project could deliver a premium product of plus-6% Li2O concentrates with low-level contaminants using simple gravity beneficiation.
"Further sighter flotation test-work at 106µm grind on fine pegmatite achieved exceptional recoveries up to 95.4% with concentrate grades between 4.2% to 6% Li2O, which is a a great initial result and demonstrates further optionality for a processing plant," he said.

He said this suggested a simple flowsheet design using crushing and gravity beneficiation to generate saleable concentrates with low capital intensity start-up, which could be further enhanced with a flotation cell to recover additional lithium credits at a later stage.

Like London-listed SolGold, IronRidge is part of DGR Global stable of companies.

ASX-listed, Nick Mather-led DGR holds 22% of IronRidge.

After spiking early in the day, IronRidge shares dropped 0.9% on Tuesday to 16.1p, up from 15.5p at the start of January.