Emerging Northern Territory lithium developer, Core Exploration has reported that recent metallurgical test work on core from the Grants deposit has delivered outstanding results and supports the business case for saleable concentrate from a simple DMS plant designed to use a gravity only circuit.
|Image courtesy ©Core Exploration|
High-grade 5.5 per cent lithium concentrate was produced at an elevated recovery of 79 per cent in new metallurgical testwork for the design of a simple gravity separation plant using industry standard Dense Media Separation (DMS).
These new results significantly improve on the results of the preliminary testwork conducted in 2017 that were utilised in the recent PFS assumptions, based on producing a 5.0 per cent Li2O concentrate at 76 per cent recovery.
A 6.1 per cent Li2O concentrate was also produced at good commercial recoveries of 69 per cent using DMS at the same sizing in the recent testwork. Ongoing testwork will be further refined over coming months with the aim of optimisation of the production of higher concentrate grades to be considered in the Feasibility Study later this year.
Commenting on the successes of the metallurgical testwork, Core’s Managing Director Stephen Biggins said that Core’s metallurgical test work completed shows that Core can produce high quality, spodumene concentrates with good recoveries through a simple, low capital cost DMS processing circuit, avoiding the much higher capex requirements of a large flotation circuit.
“The high-grade lithium concentrate produced by Core is showing to be of excellent quality with low iron and low in other impurities,” said Mr Biggins.
“These new improved grades and recoveries in the recent testwork are likely to have a significantly positive affect on economics of the project and will be considered by Feasibility Study numbers that is underway and scheduled for completion later in the year.”
The new metallurgical testwork was conducted on a composite sample from an additional five HQ ½ core diamond holes spatially distributed within the Grants Lithium Deposit located near Darwin in the Northern Territory.