Black Rock achieves world first, ultra-high graphite grade

By Meagan Evans. Published at May 8, 2018, in Mining

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Tanzanian graphite developer Black Rock Mining Limited (ASX:BKT) has reported a world first pilot plant production of ultra-high graphite concentrate grade of over 99% using flotation methods only.

The test was conducted as part of an upgrade program during recent pilot plant testing at SGS Lakefield in Canada for BKT’s 100%-owned Mahenge Graphite Project in Tanzania.

Mahenge graphite project map

Mahenge Graphite Project is one of the largest JORC-compliant flake graphite Mineral Resource Estimates globally, with a Mineral Resource Estimate of 211.9m tonnes at 7.8% graphite (TGC) for 16.6m tonnes of contained graphite. Importantly, more than 50% of the Mineral Resource is in the Measured and Indicated categories.

It should be noted that BKT is an early stage play and anything can happen, so seek professional financial advice if considering this stock for your portfolio.

Here is a summary of the test production of Ultra class concentrate from Ulanzi:

Ulanzi graphite concentrate

Black Rock’s CEO John de Vries commented: “We are not aware of any deposit that is capable of producing 99.3% grade concentrate by standard flotation alone. Being able to generate ultra-high grade product using flotation is of significant value to downstream processors who are increasingly finding environmental constraints impacting their business. The value proposition of producing high specification concentrate has been validated by Syrah Resources’ recent announcement of planned increases of Balama concentrate grades to a targeted 97%-98% TGC.”

“We are particularly pleased with the minimal flake degradation during the additional polishing. With over 55% of the ultra grade concentrate reporting to the large and jumbo fraction, this simply underlines how remarkable Mahenge flake really is.”

“We believe through the consistent delivery of outstanding results and steadily progressing the project, Mahenge is demonstrating itself as the best undeveloped graphite project available globally.”

Pilot Plant Testworks SGS Lakefield in Canada completed the pilot plant test work, processing 90 tonnes of Mahenge ore, comprising 50 tonnes from Cascades and 40 tonnes from Ulanzi. Mechanical commissioning was completed on 21 March 2018 with primary circuit processing completed on 5 April 2018. Ultra grade concentrate was delivered by repossessing 97.5% premium concentrate.

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