viewCobalt Blue Holdings Ltd

Cobalt Blue indicates positive cobalt recoveries in Thackaringa metallurgical work

Along with metallurgical work, the company is undertaking a resource upgrade at Thackaringa, due at the end of March.

Cobalt sulphate produced from previous tests of ore from Thackaringa

Cobalt Blue Holdings Ltd (ASX:COB) has demonstrated positive results in large scale metallurgical test work at its Thackaringa Cobalt Project in New South Wales.

Cobalt-pyrite concentrates were produced from 45 tonnes of ore samples that originated from the previous two drilling programs.

The results were in line with key outcomes obtained in the pre-feasibility study and add confidence that the target mass recovery to concentrate is about 20% and a target cobalt recovery from ore to concentrate of more than 90%.

Key metallurgical work program summary


READ: Cobalt Blue results support potential to improve and upgrade Thackaringa cobalt

The weighted average recovery of cobalt from the entire 44.5 tonnes of ore to cleaner gravity concentrate was 68%, from a weighted average head ore grade of 1,002 ppm.

Concentrate cobalt grade averaged 4,655 ppm and the mass recovery was 14.5%.

The results will be used by Cobalt Blue to optimise its process engineering design criteria and the produced concentrate will be used for thermal decomposition trials.

A follow-up program is expected later this year, with 40-50 tonnes of reverse circulation and diamond drill core samples stored in Broken Hill.

Summary of concentrate circuit mass and cobalt recoveries (flotation recoveries to be confirmed)


READ: Cobalt Blue bolsters board through appointment of seasoned mining industry executive

Ore was screened at 1,180 microns, with oversize crushed to meet the upper particle size threshold.

Samples were then passed over commercial-sized gravity spirals working in a rougher-cleaner sequence, with the tails then forwarded to flotation cells.

To date, 45 tonnes of ore have been gravity separated and final work is ongoing for recovery of sulphides from the gravity circuit tails.

The gravity rougher concentrate was reprocessed through a gravity cleaner circuit and the rougher tails were classified prior to scavenger flotation, whereas the cleaner tails were forwarded directly to flotation.

Results from the flotation circuit are expected to be finalised next month.

Quick facts: Cobalt Blue Holdings Ltd

Price: 0.115 AUD

Market: ASX
Market Cap: $18.39 m

Add related topics to MyProactive

Create your account: sign up and get ahead on news and events


The Company is a publisher. You understand and agree that no content published on the Site constitutes a recommendation that any particular security, portfolio of securities, transaction, or investment strategy is...

In exchange for publishing services rendered by the Company on behalf of Cobalt Blue Holdings Ltd named herein, including the promotion by the Company of Cobalt Blue Holdings Ltd in any Content on the Site, the...



Cobalt Blue 'well on its way to signing 10 global sample partners' for its...

Cobalt Blue Holdings Ltd's (ASX:COB) Joe Kaderavek updates on its 100%-owned Broken Hill cobalt project (BHCP) in Australia. He says they're targeting 4,000 tonnes in production of cobalt as either a hydroxide or a battery-ready product. ''The product will make around 80% of its revenue...

on 26/5/20

2 min read