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Method for improving leaching rate of in-situ leaching uranium mining using ultrasonic waves

A technology for in-situ leaching of uranium and ultrasonic waves, which is applied in the fields of mining fluids, earth-moving drilling, wellbore/well components, etc., to achieve the effects of improving oil recovery, improving permeability, and improving permeability.

Active Publication Date: 2017-07-14
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the field of in-situ leaching uranium mining, ultrasonic waves are only used for well flushing of boreholes, and the method of using ultrasonic waves to increase the leaching rate by acting on the ore layer is still blank in China.

Method used

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  • Method for improving leaching rate of in-situ leaching uranium mining using ultrasonic waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A sandstone-type uranium deposit in the Erlian Basin in northern my country, an expanded test well site for in-situ leaching.

[0027] The test period is 2 months, and the machine is turned on for 2 hours a day. During this period, 2 groups of "1 pumping and 4 injections" leaching units are selected. The distance between the two units is about 220m. unanimous. Unit A is equipped with an ultrasonic leaching device, and unit B is used for normal pumping and leaching in an ordinary way. The two units of A and B are incorporated into the pumping system at the same time for a comparative test.

[0028] Finally, the following conclusions were obtained. Before the test started, the permeability coefficients of units A and B were both about 0.2m / d, and the flow rate of the pumping hole was 3.5m 3 / h or so, the leachate concentration is about 18mg / L. When the power of the ultrasonic generator is 10Kw, after 2 months of ultrasonic leaching test, the permeability coefficient of ...

Embodiment 2

[0030] A sandstone-type uranium mine in Tianshan, Xinjiang, Northwest my country, mine field of in-situ leaching production plant.

[0031] The test period is 6 months, and the machine is turned on for 8 hours a day. During this period, two groups of "1 pumping and 4 injections" leaching units are selected. The distance between the two units is about 500m. unanimous. Unit A is equipped with an ultrasonic leaching device, and unit B is used for normal pumping and leaching in an ordinary way. The two units of A and B are incorporated into the pumping system at the same time for a comparative test.

[0032] Finally, the following conclusions were obtained. Before the test started, the permeability coefficients of units A and B were both about 0.2m / d, and the flow rate of the pumping hole was 3.0m 3 / h, the leachate concentration is about 10mg / L. When the power of the ultrasonic generator is 15Kw, after 6 months of ultrasonic leaching test, the permeability coefficient of the un...

Embodiment 3

[0034] In a sandy mudstone-type uranium deposit near Erenhot in northern my country, the in-situ leaching expanded test well site.

[0035] The test period is 4 months, and the machine is started for 5 hours a day. During this period, two groups of "1 pumping and 4 injections" leaching units are selected. The distance between the two units is about 300m. unanimous. Unit A is equipped with an ultrasonic leaching device, and unit B is used for normal pumping and leaching in an ordinary way. The two units of A and B are incorporated into the pumping system at the same time for a comparative test.

[0036] Finally, the following conclusions were obtained. Before the test started, the permeability coefficients of units A and B were both about 0.1m / d, and the flow rate of the pumping hole was 5m 3 / h or so, the leachate concentration is about 14mg / L. When the power of the ultrasonic generator is 30Kw, after 4 months of ultrasonic leaching test, the permeability coefficient of the ...

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Abstract

The invention relates to the technical field of in-situ leaching uranium mining, in particular to a method for improving the leaching rate of in-situ leaching uranium mining using ultrasonic waves. The method comprises the following steps that one leaching unit including one pumping hole and four injection holes in a in-situ leaching uranium mining field is selected, four sets of ultrasonic energy gathering devices are put into the four injection holes, the putting depth is the distance to the middle position of an ore bed; when an target leaching unit is in the normal pumping injection operation, the four sets of ultrasonic generators are opened at the same time, the ultrasonic waves at the same time act on the target ore bed through the ultrasonic energy gathering devices in the injection holes; the operation cycle of the ultrasonic energy gathering devices and the ultrasonic generators is 2-6 months, the daily available machine time is not less than 2-8 hours, leaching liquid flow and target element concentration are measured and recorded, and the changes of ore bed permeability coefficient and leaching rates are calculated. According to the method for improving the leaching rate of the in-situ leaching uranium mining using the ultrasonic waves, the uniform and effective contact between leaching agents and ores is realized, the chemical reaction rate is accelerated, the purpose of increasing the leaching liquid concentration and the leaching rate is achieved, the mining speed is accelerated and the recovery rate is improved.

Description

technical field [0001] The invention belongs to the technical field of uranium mining by in-situ leaching, and in particular relates to a method for improving the leaching rate of uranium in in-situ leaching mining by using ultrasonic waves. Background technique [0002] In-situ leaching uranium mining refers to a mining process that uses leaching agents (specific chemical solutions) to selectively extract and recover uranium from sandstone-type uranium ores with certain permeability under natural occurrence conditions. At present, it is widely used in the development of sandstone-type deposits with excellent permeability, but among the initially proven sandstone uranium resources in China, low-permeability resources with a permeability coefficient less than 0.5m / d account for more than half. There has been no breakthrough in the research on in-situ leaching methods for low-permeability sandstone-type uranium deposits, especially argillaceous sandstone or mudstone-type urani...

Claims

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Application Information

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IPC IPC(8): C22B60/02C22B3/04E21B43/16
CPCC22B3/04C22B60/0221E21B43/16
Inventor 周根茂张翀姚益轩李宏星胥国龙闻振乾郑剑平许智慧
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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