Electric in-situ leaching uranium mining device and method

Abstract

The invention provides an electric in-situ leaching uranium mining device and method, and belongs to the technical field of in-situ leaching uranium mining, the electric in-situ leaching uranium mining device comprises a liquid injection well, a liquid extraction well, a positive electrode, a negative electrode, a leaching solution and a direct current power supply; uranium ore is arranged between the liquid injection well and the liquid extraction well; the negative electrode is arranged in the liquid injection well; the positive electrode is arranged in the liquid pumping well; the leaching liquid is injected from the liquid injection well, passes through uranium ore and then is extracted from the liquid extraction well, so that uranium extraction is carried out; the direct-current power supply is connected with the positive electrode and the negative electrode and is used for applying direct current between the positive electrode and the negative electrode, so that uranium-carrying ions are promoted to be gathered towards the liquid extraction well, the occurrence probability of chemical blockage is reduced, meanwhile, pollutants are limited from migrating to the surrounding environment, the permeability and porosity of uranium ore are improved, and the uranium ore quality is improved. And the uranium mining efficiency of the conventional permeable sandstone is improved.

Description

technical field [0001] The invention relates to the field of in-situ leaching and mining of uranium, in particular to an electric in-situ leaching and mining uranium device and method. Background technique [0002] Uranium is an important nuclear power fuel and a strategic resource for national defense. Currently, it is mainly mined by in-situ leaching. However, whether the in-situ leaching process can be applied to uranium reservoirs depends on the porosity and permeability. When the permeability is less than 0.1 m / d, it is still impossible to achieve economic exploitation through in-situ leaching. For uranium mines with a permeability of ≥0.1m / d, although the in-situ leaching process can be used for mining, from the start of production, continuous pumping is required to maintain the descending funnel, so as to minimize the impact on the surrounding environment. The consumption is still relatively large, which is not conducive to the realization of the goal of the dual-car...

AI Technical Summary

Problems solved by technology

Aiming at the problem of low permeability, researchers have discussed physical methods such as in-situ blasting and hydraulic fracturing through theory and experiments, as well as the application of chemical methods such as surfactants and inorganic acids to enhance permeability, but the physical methods are difficult to implement on site. The ability of chemical methods to increase permeability is limited

Moreover, due to the prevailing preferential flow in the in-situ leaching uranium mining process, the leaching agent can only flow through a small part of the ore body, resulting in a long uranium mining cycle and extremely low efficiency.

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