Henderson, of Bristol, for a method of obtaining copper and other metals ... is dissolved out of the ore, the residue is washed with water, removed, and a fresh charge of ore put into the vats.

The mixture is tipped into cold water. Pieces of brown copper sink to the bottom, leaving unreacted powder suspended in the water. Ores of very reactive metals have to be melted and electrolysed ...

There was plenty of ore left there decades ago, he said, and it’s still waiting. A spokesperson for Resolution Copper said the mine will be a leader in water efficiency and that the Forest ...

Sandfire Resources America (TSXV: SFR) has received another positive court ruling in Montana, this time regarding its leasing ...