Method for monitoring leaching state of in-situ leaching uranium mining

An in-situ leaching and leaching technology for uranium mining, applied in the field of uranium mining, can solve the problems of inability to accurately describe the leaching state and affecting the precise management and control of the mining process.

Active Publication Date: 2021-05-18
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

[0004] Affected by various factors such as the complexity of the ore body and its leaching under natural burial conditions, the accuracy of resource estimation, etc., there is often a large gap between the calculated uranium leaching rate and the expected value corresponding to the leaching process. Some mining areas The calculated leaching rate has exceeded 100% before final mining; some mining areas have been finalized, and the calculated leaching rate is less than 40%. The above phenomenon seriously affects the precise management and control of the mining process
Therefore, the leaching rate data of the mining area cannot accurately describe the leaching state of different parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A sandstone uranium mine in Inner Mongolia adopts the acid in-situ leaching uranium mining process. The pumping and fluid injection drilling holes at the well site adopt a 5-point layout, and the distance between the fluid pumping hole and the adjacent fluid injection hole is 30m.

[0032] Step 1: At the midpoint of the line connecting the pumping hole of a certain leaching unit and an adjacent injection hole in the first mining area, a monitoring hole is constructed with reference to the drilling structure of the process and the construction process of the well, and the monitoring hole ore sample is taken.

[0033] Step 2: Dry the ore sample collected in step 1 under the condition of isolation from air, crush it to natural particle size, and mix it evenly; analyze the uranium content in the ore sample to be 0.032%, and take 50g of condensed samples and put them into the mesh In 6 nylon bags with a size of 0.020 mm, samples were taken every 6 months.

[0034] Step 3: Se...

Embodiment 2

[0037] A sandstone uranium mine in Inner Mongolia adopts the acid in-situ leaching uranium mining process. The pumping and fluid injection drilling holes at the well site adopt a 5-point layout, and the distance between the fluid pumping hole and the adjacent fluid injection hole is 30m.

[0038] Step 1: Between the extraction hole of a leaching unit in No. 6 mining area and the connection line of an adjacent injection hole, 10m and 20m away from the extraction hole respectively, two monitoring holes were constructed with reference to the drilling structure of the process and the construction process of the well. Take monitoring hole ore samples.

[0039] In the second step, the ore sample collected in the first step is dried and crushed to a natural particle size under the condition of being isolated from the air, and mixed evenly. The uranium content in the analyzed ore samples was 0.050%, and 100g of condensed samples were taken and put into 6 nylon bags with a mesh size of...

Embodiment 3

[0043] A sandstone uranium mine in Inner Mongolia adopts the acid in-situ leaching uranium mining process. The pumping and fluid injection drilling holes at the well site adopt a 5-point layout, and the distance between the fluid pumping hole and the adjacent fluid injection hole is 30m.

[0044] Step 1: At the midpoint of the injection hole of a certain leaching unit in the No. 9 mining area and the adjacent injection hole, a monitoring hole is constructed with reference to the drilling structure of the process and the well construction process, and the monitoring hole ore sample is taken.

[0045] In the second step, the ore sample collected in the first step is dried and crushed to a natural particle size under the condition of being isolated from the air, and mixed evenly. The uranium content in the analyzed ore sample was 0.040%, and 200g of the shrinkage samples were taken and put into 4 nylon bags with a mesh size of 0.100mm, and samples were taken every 6 months.

[00...

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Abstract

The invention belongs to the technical field of uranium mining, and particularly relates to a method for monitoring the leaching state of in-situ leaching uranium mining. The invention discloses a method for monitoring the uranium leaching state in an underground ore bed in the in-situ leaching uranium mining process. The method is mainly characterized in that monitoring holes are constructed in different positions in an in-situ leaching uranium mining well site, a certain number of sample bags filled with ore samples are hung in the monitoring holes, one sample bag is taken out every certain monitoring period for sample analysis, and the leaching states of uranium in ore beds at different positions at different leaching times of the in-situ leaching uranium mining well site are obtained through calculation. And the next production mining area is accurately guided to adjust process parameters.

Description

technical field [0001] The invention belongs to the technical field of uranium mining, in particular to a method for monitoring the leaching state of uranium in ground leaching mining. Background technique [0002] In-situ leaching uranium mining is a uranium mining method that integrates mining and smelting to dissolve uranium in the ore from natural burial conditions through drilling and chemical reagents without causing the ore to move. The process has the advantages of low production cost, short construction period, and environmental friendliness, and its processing object is sandstone-type uranium ore resources. [0003] The leaching state of underground uranium resources is particularly important for the process of in-situ leaching uranium mining. The leaching state of uranium in the current in-situ leaching mining is generally judged indirectly by the reagent formula and the concentration of uranium in the leach solution to determine the leaching state of uranium in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N13/00
CPCG01N1/28G01N13/00Y02P10/20
Inventor 闻振乾姚益轩阙为民胥国龙张翀王兴
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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