Second Successful EnvironLeach Test Results[url=https://ceo.ca/@accesswire/golden-predator-successfully-tests-enviroleach-process]GPY Successfully Test EnvironLeach Process on Sulphide-Based Gravity Concentrates[/url]
Nov 12, 2019 - First pilot test on two concentrate samples weighing 55.9 kg and 30.4 kg of 3 Aces gold sulfide concentrate were processed using EnviroLeach's water-based process. Following dissolution, conventional electrowinning extracted a combined weight of 169 g (5.5 oz). Recovery rate of 96.5% after 6 hours and 96.7% after 29 hours.
That works out to there actually being 174.77 g Au present in the 86.3 kg of the concentrate. About 2,025 g/t Au.
Nov 27 - A second test program was run at Golden Predator's Watson Lake plant. A 121 kg sample was processed with measured recoveries of 96.2% gold, resulting in 255 grams (8.2 troy ounces) of gold extracted from solution by electrowinning.
That works out to 265.1 g Au in the concentrate. About 2,191 g/t Au.
Next year a five-tonne bulk sample is planned to be processed.
My speculaton here is that the significant gold sulphides at Brewery Creek, currently not accounted for in the economic model, may be extracted using this process.