LEACHING COMPONENT OF HEAP LEACHING PLANT IN CONTINUOUS PERMAFROST ZONE (VERSIONS) Russian patent published in 2012 - IPC E21B43/28 

FIELD: mining.

SUBSTANCE: leaching component includes ore stock pile with surface spraying device, channel for collection of productive solutions with external berm, bed of solid waterproof film located under ore stock pile, as well as at the bottom, slopes and berm of the channel. External berm width is at least three times deeper than background seasonal melting of soils. Film bed edge is embedded in central part of berm through the value which is lower than depth of background seasonal melting of soils. The proposed design of the heap leaching component prevents leaks of productive solutions in case waterproof film is broken at stock pile bottom due to waterproof barrier made of film from above and waterproof frozen soils from below. Berm surface is covered with heat-insulating material during warm season. Upper part and external slope of berm are free from snow cover during cold season. Heat-insulating material is located under film bed at the bottom and channel slope opposite to stock pile and berm surface during warm season.

EFFECT: reducing environmental and economic risk of using heap leaching plants in permafrost zone, and reducing heat loss with productive solutions.

5 cl, 4 dwg