Discovery Reports Excellent Recoveries from Metallurgical Test Work on Cordero
September 7, 2021
September 7, 2021, Toronto, Ontario - Discovery Silver Corp. (TSX-V: DSV, OTCQX: DSVSF) (“Discovery” or the “Company”) is pleased to announce results from its metallurgical test program on representative samples from the Cordero deposit. This program represents the most comprehensive test work completed on Cordero to date. Tests were completed at the Blue Coast Research Ltd. (“Blue Coast”) laboratory located in Parksville, BC, Canada. Highlights from the test work include:
Sulphide flotation test work
- Silver recoveries of 80-89%, lead recoveries of 83-91% and zinc recoveries of 81-90% from locked cycle tests.
- Test work completed on all major rock types at Cordero.
- Higher recoveries were achieved at coarser grind sizes.
- Saleable concentrate grades confirmed and levels of penalty elements for concentrates were insignificant.
Oxide & transition cyanidation test work
- Silver recoveries of 54-80% & gold recoveries of 61-75% at coarse crush / grind sizes from coarse bottle roll testing.
- Results represent the first indication that a heap leach on the oxide & transition material at Cordero may be economic.
- Follow-up column leach test work is currently underway.
Taj Singh, President and CEO, states: “The results from this metallurgical test work program represent a major de-risking step for Cordero. All major rock types hosting sulphide ore returned excellent recoveries via conventional flotation processes to generate clean, highly saleable concentrates.
In addition, there were two new positive developments that also emerged from the test work. Firstly, the highest recoveries were achieved at coarse grind sizes of 175-200 microns, which should help reduce capital and operating costs for the project. Secondly, mineralized oxide and mixed oxide-sulphide (transition) “pre-strip” material that sits at surface above the large sulphide ore body responded very well to cyanidation introducing the potential to heap leach this material at the start of the mine life. Both developments should have a positive impact on the overall project economics that will be outlined in our PEA due for release next quarter.”
https://www.discoverysilver.co…cal-test-work-on-cordero/