The present invention relates generally to a process for recovering copper
and other metal values from metal-containing materials using controlled,
super-fine grinding and medium temperature pressure leaching. Processes
embodying aspects of the present invention may be beneficial for
recovering a variety of metals such as copper, gold, silver, nickel,
cobalt, molybdenum, rhenium, zinc, uranium, and platinum group metals,
from metal-bearing materials, and find particular utility in connection
with the extraction of copper from copper sulfide ores and concentrates.