Proactive Investors - Run By Investors For Investors

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 Blue indicates positive cobalt recoveries in Thackaringa metallurgical work
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.

View full COB profile View Profile

Cobalt Blue Holdings Ltd Timeline

Related Articles

Project area
February 12 2019
Forecast life-of-mine gold production jumps to 289,000 ounces following a new resource estimate and mine design.
Citronen camp in Greenland
April 02 2019
Its Citronen project is in Greenland while its Captains Flat JV with Glencore is in NSW.
Gold mining project development operations at West Wits Mining
April 08 2019
Sixty per cent of Mt Cecelia project’s boundaries are surrounded by Rio Tinto, which has upped its landholding in the region by 1,000%.

© Proactive Investors 2019

Proactive Investors Limited, trading as “Proactiveinvestors United Kingdom”, is Authorised and regulated by the Financial Conduct Authority.
Registered in England with Company Registration number 05639690. Group VAT registration number 872070825 FCA Registration number 559082. You can contact us here.

Market Indices, Commodities and Regulatory News Headlines copyright © Morningstar. Data delayed 15 minutes unless otherwise indicated. Terms of use