In-situ leaching of uranium by adding o2 to bicarbonate-type groundwater

A bicarbonate and groundwater technology, which is applied in the fields of fluid extraction, earthwork drilling, wellbore/well components, etc., can solve the problems of consuming large chemical reagents, changing groundwater, formation clogging, etc.

Active Publication Date: 2012-10-17
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using conventional alkaline leaching, a large amount of chemical reagents are consumed, which will change the groundwater after being injected into the ground
The chemical composition of the leaching process is also prone to formation plugging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a uranium mining area, the bicarbonate type groundwater in-situ leaching uranium extraction process of the present invention is adopted. The mine contains minerals

[0024] Oxygen can be fully mixed with the leaching solution through a pipeline mixer, and then injected into the ground. The solution used

Embodiment 2

[0034] In a uranium mining area, the bicarbonate type groundwater in-situ leaching uranium extraction process of the present invention is adopted. The mine contains minerals

[0036] Oxygen can be fully mixed with bicarbonate-containing leaching solution through a pipeline mixer, and then injected into the ground.

Embodiment 3

[0046] In a uranium mining area, the bicarbonate type groundwater in-situ leaching uranium extraction process of the present invention is adopted. The mining area contains

[0048] Oxygen can be fully mixed with the leaching solution through a pipeline mixer, and then injected into the ground. The solution used

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PUM

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Abstract

The invention provides a bicarbonate-type groundwater plus O2 leaching uranium mining process, which adopts an in-situ leaching method to mine uranium ore layers in a bicarbonate-type aquifer. In this process, O2 is directly mixed with the leaching solution and then injected into the ground. After adding oxygen to the groundwater containing HCO3-, the uranium in the ore is oxidized and leached to form [UO2(CO3)3]4- or [UO2(CO3)2]2 -The leaching solution of complex anions is then extracted from the surface and sent to the hydrometallurgy process for processing. The invention adds O2 as an oxidant and utilizes HCO3- ions in bicarbonate groundwater as a leaching agent for uranium, which can effectively control the occurrence of chemical blockage and improve the leaching rate of uranium in situ leaching. Compared with the traditional acid leaching and alkali leaching processes, the process cost is reduced and the mining environment is better protected. From the test results, the concentration of uranium leached by adding O2 in bicarbonate-type groundwater can reach 30mg/L, which meets the requirements of industrial production.

Description

Add O to bicarbonate groundwater 2 in situ leaching uranium mining process technical field The present invention relates to a kind of processing method of in-situ leaching mining uranium, particularly a kind of utilizing bicarbonate type ground water to add O2 in-situ leaching uranium mining process. Background technique In situ leaching mining uranium (abbreviation ground leaching mining uranium) is that the liquid injection well drilled into the ore-bearing layer from the surface will press a certain ratio The prepared solution is injected into the ore layer, and the injected solution reacts with the useful components in the ore to form a chemical reaction. The soluble compounds leave the chemical reaction zone under the action of diffusion and convection and enter the solution flow that permeates and migrates along the ore bed The leachate is formed; the leachate is lifted from the pumping well to the surface through the ore layer, and the extracted leachate i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00C22B60/02C22B3/04
Inventor 苏学斌刘乃忠姚益轩谭亚辉杜志明沈红伟程宗芳郭忠德杜运斌苏艳茹王晓东原渊
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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