Reaction migration numerical simulation method for sandstone type uranium mine CO2+O2 in-situ leaching uranium mining

Abstract

The invention discloses a reaction migration numerical simulation method for sandstone type uranium ore CO2 + O2 in-situ leaching uranium mining, which can break through the traditional in-situ leaching uranium mining solute migration numerical simulation method only considering convection and dispersion effects, and tries to establish a multi-field coupled reactive solute migration model to simulate the dynamic leaching process of northern sandstone type asphalt uranium ore. The method provided by the invention comprises the following steps: constructing a thermodynamic database suitable for the CO2 + O2 leaching process of the northern sandstone-type uranium mine, considering a uranium dissolution kinetic reaction process under the combined action of oxygen O2 (aq) and bicarbonate HCO3-, and carrying out CO2 + O2 in-situ leaching uranium mining reaction migration numerical simulation by adopting a TOUGHRECT simulation technical framework. The simulation technology provided by the invention can provide technical support for carrying out accurate simulation and dynamic adjustment and control of the mining region scale CO2 + O2 leaching process.

Description

technical field [0001] The invention relates to a sandstone type uranium ore CO 2 +O 2 The invention relates to a reaction migration numerical simulation method for in-situ leaching mining of uranium, which belongs to the fields of hydrology and water resources. Background technique [0002] Uranium resources are important raw materials for nuclear military industry and nuclear power, and are called the "food" of the nuclear industry. In-situ leaching is a new global uranium mining method that integrates mining, beneficiation, and hydrometallurgy. It is estimated that in-situ leaching will account for more than 90% of China's natural uranium production capacity. with CO 2 +O 2 The third-generation uranium mining and smelting technology represented by in-situ leaching uranium mining technology has solved the problems of low permeability, high carbonate, and high salinity sandstone-type uranium deposits, such as low pumping liquid volume, long leaching cycle, and easy bloc...

AI Technical Summary

Problems solved by technology

[0003] However, in the actual production process, there is a lack of numerical simulation technology to systematically study the dynamic process prediction and precise control technology of in-situ leaching wellsite leaching.

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