Environmental Engineering Reference
In-Depth Information
FIGURE 5.5
Three Approaches to Leach Pad Design
Water
Reagent
Valley Pad System
Barren Solution
Barren
Solution
Pond
Heap leaching is a relatively common
process used for the recovery of base
metals and precious metals (gold and
silver) from amenable low grade ores
or, occasionally, from previously proc-
essed tailings.
Ore
Leaching
Solution
Metal
Recovery
Ore Lifts
Pregnant
Solution
Pregnant Solution
Containment
(Saturated Zone)
Water
Reagent
Reusable Pad System
Barren
Solution
Pond
Barren Solution
Ore
from Mine
Spent Ore
to Pile
Metal
Recovery
Leaching
Solution
Heaps
Stacking
Leaching
Rinsing
Pregnant
Solution
Pond
Gold-Bearing
(Pregnant) Solution
Expanded Pad System
Water
Reagent
Barren
Solution
Pond
Barren Solution
Metal
Recovery
Ore
Ore
Leaching
Solution
Segment
Closed
Rinsed
Active
Active
Future
Pregnant
Solution
Pond
Search WWH ::
Custom Search