Metallurgical Tests Indicate 93.5% to 98.3% Overall Gold Recovery at Golden Predators 3 Aces Project, Yukon
Hayden, Idaho (FSCwire) - Golden Predator Mining Corp. (TSX.V: GPY) (the “Company”) announces metallurgical testing has been completed on 3 large volume samples collected from the Sleeping Giant zone on the 3 Aces property in the Yukon Territory. Overall gold recoveries for the three samples were reported at 98.3%, 97.9% and 93.5%. The three samples were processed in their entirety in bulk fashion by gravity and gravity tail leaching. The final results of the metallurgical testing on the three samples showed that very high overall gold recoveries can be achieved by simple initial gravity methods followed by final CN leaching of the tails.
Metallurgical Testing
The final bulk processing of the three large samples was conducted by grinding the entire sample in batches of 10 kg to a target grind size of 80% passing 200 microns. After grinding, the whole sample was fed through a Knelson concentrator for gold recovery. The results show the gravity gold recoveries at this grind size ranged from 74.6% to 88.5%. A split of the gravity tails from each sample was then ground to 80% passing 75 microns and subjected to cyanide leaching. The results showed the leach kinetics are very fast within the first 24 hours and gold extraction from the tails ranged from 74.3% to 90.2% for the samples. Table 1 shows the gravity, CN leach and overall total gold recoveries for the samples.
Table 1: Gravity & CN Leach Total Gold Recoveries
Sample | Au Rec., % | Gravity | Gr-tail CN | Combined Gr & Gr-tail CN |
GR-1 | CN-1 | |||
BS-3A13-03 | Conc. | 78.9 | 90.2 | 97.9 |
Tail | 21.1 | 9.80 | 2.1 | |
GR-2 | CN-2 | |||
BS-3A13-02 | Conc. | 88.5 | 85.4 | 98.3 |
Tail | 11.5 | 14.6 | 1.7 | |
GR-3 | GR-3 | |||
BS-3A13-01 | Conc. | 74.6 | 74.3 | 93.5 |
Tail | 25.4 | 25.7 | 6.5 |