Research on the choice of the composition of the leaching solution during the extraction of gold by the method of underground leaching from used uranium wells

Abstract

The use of sodium hypochlorite and thiourea as reagents-solvents for extracting gold from spent uranium deposits by underground leaching was determined as optimal based on the laboratory experiments. Activated carbon of the AG-3 grade has been determined as the most effective for gold extraction from the productive solution. Qualitative parameters of underground leaching, lithology thickness, planar and cross-sectional shapes, as well as filtration properties of wells along with infiltration flow irrigation zones have been established through bench-scale testing. A new model of solution filtration by high-pressure and free flooding onto the reservoir has been developed using the results obtained.