The company has completed two detailed metallurgical test work programs that demonstrate excellent recoveries via conventional flotation of all major rock types to generate clean, highly saleable concentrates.
Highlights from the test work include:
- Silver recoveries of 80-98%, lead recoveries of 83-97% and zinc recoveries of 81-96% from locked cycle tests.
- Test work completed on all major rock types at Cordero.
- Higher recoveries were achieved at coarser grind sizes.
- Oxide-sulphide blend testwork establish oxide-specific recoveries of ~60% for silver, ~40% for lead and ~85% for zinc via flotation; co-processing oxide mineralized material via flotation eliminates the need for heap leach processing.
Further details can be found in our September 7, 2021 press release and our August 29, 2022 press release.