Itronics believes that the technologies it has been developing can provide investors exposure to increased metals prices through its positioning as a critical part of the equation ... gold recovery, ...

The Cripple Creek and Victor Gold Mine in Teller County sprays cyanide over piles of crushed ore and collects the liquid that runs off — a process called “heap leaching.” The division has ...

Cyanide leach tests for the fresh gold samples for the sample with less than 1% sulfur content have achieved 98.8% gold recovery and the second gold sample with approximately 3% sulfur content ...

The project, known as the Stibnite Gold Project, is an "open-pit cyanide leach gold mine" planned for Idaho's Salmon River Mountains. The mine would use cyanide to extract gold and would ...

In 1998, voters in Montana banned cyanide heap-leaching, a process developed to leach gold from lower-grade ore. That same year Pegasus Gold filed for bankruptcy.

Barrick Gold (TSX ... % reduction in cyanide use by adding the GlyCat technology to the processing plant. Gold recovery remains comparable to traditional cyanidation. Glycine leaching technology ...

The report findings include a base of 62% recovery of gold and 47% recovery ... that the first 30 days of leaching was restricted by an erratic and low flowrate of cyanide leaching solution.