METHOD FOR EXTRACTING RARE METALS FROM ASH-SLAG MASSES OF USED UNDERGROUND GAS GENERATOR Russian patent published in 2012 - IPC C22B3/06 C22B60/02 

FIELD: metallurgy.

SUBSTANCE: intensified extraction of underground water is performed from used underground gas generator through the main water drain wells. Then, there created is cone of depression in the section of used underground gas generator for minimisation of underground water level and maintenance of maximum depression in the section of used underground gas generator. Treatment of ash-slag masses is performed using the solvent injected to the used underground gas generator, and leaching and collection of rare metal dissolved in the solvent extracted from underground gas generator is performed in surface chemical complex.

EFFECT: minimisation of negative environmental impact of solvent at leaching of rare metals from ash-slag masses owing to restricting the migration zone of solvent to the rock mass beyond the limits of underground gas generator.

4 cl, 1 dwg