Heap Leaching

Heap Leaching is a process that used to treat the gold mine with low grade, cause it’s processed simple, easy operation, low energy consumption, investment saving, effective . Scale can be chosen, the maximum scale can be million tons /day.

Technology process
Heap leaching process composes of concrete of the site, pre-process of the ore (crush or produce), concrete heap, spray leaching, disinfect and discharge the recovery of gold from pregnant solution.

Raw ore processing 
After the raw ore ground by jaw crusher and cone crusher, the particles become (30-50mm), put them to concrete directly; fine particles need to be produced (make the fine particles become the rough particles ) ， then transport the mineral by forklift truck to the concrete heap.

Spray system :
put a spray system above the heap. After cyanide solution and heap reacted, the pregnant solution exudes from the heap and flow into the pregnant tank, then infiltrate into absorption column by the pregnant solution pump, the solution rest is the barren solution, barren solution return to spray system for recycling.
Desorption and electrowinning :  
with high temperature and high pressure in the desorption and electrowinning, the gold pulp come out, after smelting, come out the gold bullion. The main equipment in heap leaching that including jaw crusher, cone crusher, spray device， desorption and electrowinning, smelting device etc.