Rock Tech Lithium Inc. (CVE:RCK) announced that it has further improved the quality of its metallurgical sample and achieved purity of 99.988% lithium carbonate on the bulk sample taken from its Georgia Lake project, Ontario.
The press release is quoted as saying:
A standard hydrometallurgical flow sheet was used which included concentrate leach, primary impurity removal, secondary impurity removal, ion exchange, lithium carbonate precipitation and bicarbonate polishing. The key findings related to this six-stage processing can be found in the detailed report posted on the Company’s website (www.rocktechlithium.com).
The main objective of the test program was to determine if a high-grade lithium carbonate sample could be produced from the three concentrate samples generated through heavy liquid separation (HLS) and floatation. The first attempt produced a Li2CO3 product with a purity of 99.963%. After processing the sample through the bicarbonate polishing step, a Li2CO3 product with a purity of 99.988% was produced. Though specification for lithium carbonate purity varies among battery manufacturers, purity must meet or exceed a 99.5% threshold.
Rock Tech’s President and CEO, Eunho Lee commented:
“We are very pleased with the results of the hydrometallurgical study carried out in cooperation with SGS Lakefield. The study clearly demonstrates that a high-quality, battery-grade lithium carbonate product can be produced from the lithium-bearing pegmatites found at Rock Tech’s Georgia Lake project.”