Black Rock Mining Reports Excellent Ulanzi Results

Published at Apr 27, 2016, in Mining

Black Rock Mining (ASX:BKT) continues to deliver excellent results as it further explores for graphite in Tanzania at its Mahenge Project.

Tanzania is a highly volatile area with severe jurisdictional risk.

Optimisation work in the Ulanzi Graphite Resource area at Mahenge on bulk samples continues to deliver incremental improvements to graphite purity and flake sizing.

Further testing currently being undertaken is expected to see significant additional improvements.

The results have shown up to 98.2% purity for its resources coarsest fractions.

The entire +75 to +500 micron portion of flake graphite is now achieving >97.1% TGC (Total Graphitic Carbon) purity. This represents 98.3% of all graphite produced.

The Ulanzi bulk sample has a bias towards coarse sizing, with 66.3% of the flake graphite produced through test work showing >180 microns in size (coarse, jumbo and super jumbo sizing).

This size fraction typically receives a price premium to finer flake, meaning there is potential to improve the basket pricing from the scoping study where 50% coarse sizing was assumed.

In the coming months, further metallurgical samples will be sent from Tanzania to test additional portions of the Ulanzi and Cascade lodes.

Two bulk surface samoles and rill core samples are currently being prepared.

Further test work will determine chemically upgraded purity and the suitability of Mahenge graphite flake for a suite of value added applications including expanded graphite, expandable graphite, spherical graphite test work and other industrial applications.

The metallurgical programme will continue for up to six months in parallel with Pre-Feasibility and Bank Feasibility studies.

The ongoing metallurgical programme continues to deliver significant improvements in purity and flake size for the Company to optimise a process flowsheet,” said Black Rock Mining Managing Director Steve Tambanis.”

“Results indicate that Mahenge graphite can manufacture premium flake products from a straightforward flotation circuit and there is scope for additional improvements.”

Mr Tambanis will announce additional results in coming months with regard to process optimisation and expandable, spherical and battery testing.

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