UNDERGROUND LEACHING METHOD OF MINERAL RESOURCES FROM RAW MATERIAL Russian patent published in 2011 - IPC C22B3/04 E21B43/28 

FIELD: mining.

SUBSTANCE: underground leaching method of mineral resources from raw material involves filling of cavities of underground openings in the form of chamber with raw material, and their sealing. Then, erection of pipelines and branch pipes for supply of leaching solution in raw material, air for oxidation of raw material minerals and supply of productive solution for processing is performed in openings. Prior to leaching the mine water is collected and leaching solution is prepared in the built chamber of capacity, which is mentioned below. Leaching is performed at increased temperatures and pressure which is maintained during the required period of time by shutting off gate valves of branch pipes which are used before opening for supply of leaching solution in raw material and supply of productive solution for processing.

EFFECT: lower costs for leaching of raw material owing to reducing capital investments, energy and material consumption.

1 dwg