Kerr Mines Inc (KER)

[goldenpolarbear]

“...An updated resource and reserve estimate should be completed before the end of the year.

In addition to the drill program, Kerr Mines will be validating the 95% recoveries it achieved during its engineering study in late-2017 and early-2018.

“The metallurgical work that was previously done was based on a flotation circuit and got 85% recoveries, while we determined with minor modifications we could increase recoveries to 95% — a major increase,” Ciavarella says.

The company recently received an air permit from the State of Arizona that gives it permission to build the whole ore leach and SART gold processing systems.

The air permit allows the company to modify processing from flotation to whole ore leach. “It’s tank leaching, where you’re leaching the gold out of the rock primarily through the use of consumables and reagents,” he explains. “The leaching process that we want to use is actually what was used by the original miner — Cypress Minerals back in the 1980s and early 1990s.”

In addition, Kerr is evaluating whether it should incorporate a SART circuit to the planned gold processing plant. The Sulfidization-Acidification-Recycle-Thickening circuits can trim operating costs by reducing the consumption of reagents and can add revenue from the recovery of copper from gold ore....”

https://www.northernminer.com/news/kerr-mines-focuses-on-mine-life-extension-at-copperstone-in-arizona/1003803919/