Heap Leaching. Heap leaching is a simple, low cost method of recovering precious metals from low grade ores. Ore is stacked in heaps over an impermeable leaching pad. Leach liquid is irrigated at the top; Liquid reacts with metal and dissolves it. Dissolved metal collected at the bottom in the leaching pad. Heap leaching image 145 7 8 Components of Heap Leach
3/13/2013 4 7 ENERGY FUELS INC. Heap Leaching Technology Sheep Mountain Ore Testing Types of Leach Pads Valley Fill Valley Fill Leach Facility Uses natural topography to form leach pad Requires hard, durable ore Can tolerate variable ore production and leach
Although the heap leaching is a low cost process, it normally has recovery rates of 60 70%, although there are exceptions. It is normally most profitable when used on low grade ores. (Higher grade ores are usually put through more complex milling processes where higher grades x
Viewing the listed benefits, its easy to see why the industry finds the process attractive. Decreasing the costs of production while extracting materials from existing stockpiles is certainly more attractive than dealing with the costs of start up projects. Are There Disadvantages to Heap Leaching?
Apr 25, 2018· Heap leaching is used for low grade oxides, while high grade ore is better suited to CIP or CIL methods, says Bundo. Bundo explains that while heap leaching is not as costly as CIL or CIP, the recovery achieved is also not as efficient.
The chemistry involved in the dissolution of gold in the heap leach cya nidation treatment is the same as that for the agitation cyanidation process. In heap leaching, the oxygen, essential for the dissolution of gold, is intro duced into the cyanide solution as it is being sprinkled upon the ore heap.