Methods for determining uranium content in ores

Abstract

The embodiments of the present application relate to the technical field of testing or analyzing materials by measuring the chemistry of materials, and specifically to a method for determining the uranium content in an ore, which comprises: S10: preparing a sample; S20: preparing a standard sample; S30: using a laser induced breakdown spectroscopy device to irradiate the sample and the standard sample with a laser to obtain a laser induced breakdown spectrum; S40: determining the relationship between the content of the uranium element and the intensity of the laser beam peak signal according to the laser induced breakdown spectrum and the content of the uranium element in the standard sample; S50: determining the content of the uranium element in the sample according to the relationship determined in step S40 and the intensity of the laser beam peak signal of the sample. In step S30, the plasma generated by laser irradiation of the standard sample or sample is enhanced. The embodiments of the present application enhance the analysis accuracy of the laser induced breakdown spectrum by enhancing the plasma generated by the standard sample or sample, increasing the intensity of the spectral signal emitted by the plasma, and thereby improving the accuracy of the test results.

Description

Technical Field

[0001] The present application relates to the technical field of analyzing materials by measuring their chemical properties, and in particular to a method for determining the uranium content in an ore. Background Art

[0002] This section of content merely provides background information related to the present application and does not necessarily constitute prior art.

[0003] Uranium is a radioactive metal element with a high atomic weight, which is usually used in the fields of irradiation, medical treatment, nuclear energy industry, etc. At present, the content of high atomic weight elements such as uranium is usually detected by atomic emission spectroscopy, X-ray atomic fluorescence technology and atomic absorption spectroscopy. However, the existing methods for detecting uranium content cannot meet the application needs. Summary of the invention

[0004] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0005] The present application provides a method for determining the uranium content in an ore, which comprises the following steps:

[0006] S10: preparing a sample of the ore, the sample including uranium.

[0007] S20: preparing a standard sample of the ore, wherein the standard sample includes uranium element and the content of the uranium element is known.

[0008] S30: using a laser induced breakdown spectroscopy device to irradiate the sample and the standard sample with laser to obtain a laser induced breakdown spectrum diagram.

[0009] S40: Determine the relationship between the uranium content and the laser beam peak signal intensity according to the laser induced breakdown spectrum and the uranium content in the standard sample.

[0010] S50: Determine the content of uranium in the sample according to the relationship determined in step S40 and the laser beam peak signal intensity of the sample.

[0011] In step S30, the plasma generated by irradiating the standard sample or the sample with enhanced laser light.

[0012] The embodiments of the present application use laser induced breakdown spectroscopy to analyze and test standard samples and samples, and utilize the advantages of laser induced breakdown spectroscopy such as fast analysis speed, no need for complicated sample pretreatment, and small sample usage, to simplify the analysis and testing process, thereby improving the analysis and testing efficiency. Furthermore, by enhancing the plasma generated by laser irradiation of standard samples or samples, the intensity of the spectral signal emitted by the plasma is increased, the analysis accuracy of the laser induced breakdown spectrogram is improved, thereby improving the accuracy of the uranium content test. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to further illustrate the above and other advantages and features of the present application, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. The accompanying drawings together with the following detailed description are included in this specification and form a part of this specification. Elements with the same function and structure are represented by the same reference numerals. It should be understood that these drawings only describe typical examples of the present application and should not be regarded as limiting the scope of the present application.

[0014] Figure 1 is a flow chart of a method for determining uranium content in an ore according to one embodiment of the present application;

[0015] Figure 2 is a schematic diagram of a laser induced breakdown spectroscopy device according to an embodiment of the present application.

[0016] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

[0017] Description of reference numerals:

[0018] 1. Laser induced breakdown spectroscopy device;

[0019] 10. Laser;

[0020] 20. Coil;

[0021] 30. RF power supply;

[0022] 40. Laser;

[0023] 50. Water cooling device;

[0024] 60. Light collecting lens;

[0025] 70. Optical fiber;

[0026] 80. Spectrometer;

[0027] 90. Reflector;

[0028] 100. Lens;

[0029] 110. Sample stage;

[0030] 120. Coordinate module;

[0031] 130. Timing controller;

[0032] 140. Samples;

[0033] 150. Standard sample. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0035] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in this application should have the common meanings understood by persons with ordinary skills in the field to which this application belongs.

[0037] In the description of the embodiments of the present application, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] The existing methods for detecting the content of high atomic weight elements such as uranium have problems such as low analysis efficiency, complex analysis process, low sensitivity and large sample consumption.

[0039] Based on this, an embodiment of the present application provides a method for determining the uranium content in an ore. Figure 1 is a flow chart of a method for determining uranium content in ore according to one embodiment of the present application. Figure 2 FIG. 1 is a schematic diagram of a laser induced breakdown spectroscopy device according to an embodiment of the present application. Figure 1 and Figure 2 As shown, it includes the following steps:

[0040] S10: Prepare a sample 140 of ore, wherein the sample 140 includes uranium.

[0041] S20: preparing a standard sample 150 of an ore, wherein the standard sample 150 includes uranium element, and the content of the uranium element is known.

[0042] S30: irradiating the sample 140 and the standard sample 150 with the laser 10 using the laser induced breakdown spectroscopy device 1 to obtain a laser induced breakdown spectrum diagram.

[0043] S40: According to the laser induced breakdown spectrum diagram and the content of uranium in the standard sample 150, the relationship between the content of uranium and the peak signal intensity of the laser beam is determined.

[0044] S50: Determine the content of uranium in the sample 140 according to the relationship determined in step S40 and the laser beam peak signal intensity of the sample 140.

[0045] In step S30 , the plasma generated by irradiating the standard sample 150 or the sample 140 with the enhanced laser 10 is enhanced.

[0046] The embodiment of the present application adopts laser induced breakdown spectroscopy to analyze and test the standard sample 150 and the sample 140, and utilizes the advantages of laser induced breakdown spectroscopy such as fast analysis speed, no need for complicated sample pretreatment, and small sample usage, to simplify the analysis and testing process, thereby improving the analysis and testing efficiency. Furthermore, by enhancing the plasma generated by laser irradiation of the standard sample or sample, the intensity of the spectral signal emitted by the plasma is increased, the analysis accuracy of the laser induced breakdown spectrogram is improved, thereby improving the accuracy of the uranium content test.

[0047] like Figure 2 As shown, in some embodiments, in step S30, a coil 20 is disposed on the standard sample 150 or the sample 140, and the coil 20 is connected to the radio frequency power supply 30, so that the coil 20 generates an inductance on the standard sample 150 or the sample 140 to enhance the plasma. The coil 20 enhances the mutual collision probability of charged particles in the plasma through high-frequency oscillation, realizes secondary excitation of the plasma, improves the luminous intensity and luminous lifetime of the plasma, and further enhances the spectral signal intensity emitted by the plasma.

[0048] In some embodiments, the coil 20 may be a wound copper hollow conduit.

[0049] In some embodiments, in step S30, the wavelength, energy, and frequency of the laser 10 are set, the frequency and power of the RF power supply 30 are set, and the number of turns of the coil 20 is set so that the plasma can be enhanced to a desired level. By setting the working parameters of the laser 10 and the RF power supply 30 and the number of turns of the coil 20, the laser 10, the RF power supply 30, and the coil 20 work together to enhance the plasma, thereby enhancing the spectral signal emitted by the plasma, thereby reducing the interference of irrelevant signals and improving the accuracy of the analysis and test results.

[0050] In some embodiments, by adjusting the operating parameters of the laser 10, the RF power supply 30 and the number of turns of the coil 20, different multiples of plasma enhancement can be achieved.

[0051] The inventors found that the best technical effect cannot be obtained by simply adjusting the parameters of the laser, or simply adjusting the parameters of the RF power supply, or simply adjusting the number of turns of the coil. On this basis, the inventors conducted multiple experiments and overcame the prior art's understanding of improving plasma intensity by adjusting a single reference. They combined adjusting the laser parameters, adjusting the parameters of the RF power supply, and adjusting the number of turns of the coil to organically combine the three and synchronously adjust the values ​​of the three, thereby achieving better results in plasma enhancement.

[0052] In some embodiments, the wavelength of the laser 10 is set to 1064 nm or a shorter wavelength obtained by frequency doubling 1064 nm, for example, 532 nm; the energy range of the laser 10 is set to 20-300 mJ; and the frequency range is set to 1-20 Hz. By setting the specific numerical relationship between the above three, the plasma can have a longer test time, and its intensity level can better meet the test requirements.

[0053] In some embodiments, in step S30 , the wavelength, energy and frequency of the laser 10 can be adjusted by setting the operating parameters of the laser 40 .

[0054] In some embodiments, step S30 further includes: setting the laser 40 so that the laser 40 can emit a TTL trigger signal.

[0055] In some embodiments, a suitable laser 40 can be selected according to the frequency of the laser 10, such as a nanosecond laser and a picosecond laser.

[0056] In some embodiments, in step S30, the plasma enhancement factor can be changed by adjusting the power and frequency of the RF power supply 30 to change the oscillation frequency and inductance of the coil 20. In some embodiments, the power range of the RF power supply 30 is set to 300w-3000w, and the frequency range is set to 0.1MHz-2.5GHz.

[0057] In some embodiments, in step S30, the plasma enhancement factor can be changed by adjusting the number of turns of the coil 20. In some embodiments, the number of turns of the coil 20 is set to be in the range of 3-7 turns, for example, 7 turns.

[0058] In some preferred embodiments, the wavelength of the laser 10 is set to 1064 nm, the energy of the laser 10 is set to 150 mJ, the frequency of the laser 10 is set to 10 Hz, the frequency of the RF power supply 30 is set to 0.1 MHz, the power of the RF power supply is set to 1.0 KW, and the number of turns of the coil 20 is set to 7. Through the above-mentioned working parameters of the laser 10, the RF power supply 30 and the number of turns of the coil 20, the laser 10, the RF power supply 30 and the coil 20 act together on the plasma to enhance the plasma, thereby enhancing the intensity of the laser spectrum signal.

[0059] In some embodiments, when the coil 20 is powered on, the coil 20 is cooled to prevent the enhancement of the plasma from being affected by the excessive temperature of the coil 20 .

[0060] like Figure 2 As shown, in some embodiments, in step S30 , the coil 20 may be cooled by providing a water cooler 50 connected to the coil 20 .

[0061] like Figure 2 As shown, in some embodiments, in step S30, the distance between the light-collecting lens 60 of the laser induced breakdown spectroscopy device 1 and the standard sample 150 or the sample 140 is set so that the spectral signal emitted by the plasma can be transmitted to the spectrometer 80 of the laser induced breakdown spectroscopy device 1 with maximum efficiency, so that the spectral signal received by the spectrometer 80 is stronger, thereby improving the accuracy of the laser induced breakdown spectrum diagram.

[0062] In some embodiments, step S30 further includes: providing an optical fiber 70 connected to the light collecting lens 60 , and the optical fiber 70 transmits the spectrum signal of the plasma emission collected by the light collecting lens 60 to the spectrometer 80 .

[0063] In some embodiments, step S30 further includes: setting the wavelength measurement range, resolution and integration time of the spectrometer 80. By setting the wavelength measurement range, resolution and integration time of the spectrometer 80, it is ensured that the laser ray peaks of multiple elements are included in the laser induced breakdown spectrum, and the analysis accuracy of the laser induced breakdown spectrum. In some embodiments, the wavelength measurement range of the spectrometer 80 is set to 220nm~920nm, the resolution is set to better than 0.2nm, and the integration time is set to 5ms.

[0064] In some embodiments, step S30 further includes: setting the spectrometer 80 so that the spectrometer 80 can receive the TTL trigger signal emitted by the laser 40 , thereby achieving the same frequency operation of the spectrometer 80 and the laser 40 .

[0065] In some embodiments, in step S30, it further includes: setting a reflector 90 on the optical path of the laser 10, and changing the irradiation direction of the laser 10 through the reflection of the reflector 90. In some embodiments, in step S30, it further includes: setting a lens 100 on the optical path of the reflected laser 10 to focus the laser 10 reflected by the reflector 90. In some embodiments, in step S30, it further includes: placing the standard sample 150 or the sample 140 on the sample stage 110, driving the sample stage 110 to move in the horizontal, vertical and vertical directions through the coordinate module 120, adjusting the position of the standard sample 150 or the sample 140, so that the laser 10 is focused on the surface of the standard sample 150 or the sample 140, and ensuring the irradiation intensity of the laser 10 on the standard sample 150 or the sample 140.

[0066] In some embodiments, in step S10, the following steps are also included:

[0067] S11: Turn the ore into powder.

[0068] S12: The powder is formed into a disc shape to obtain a sample 140.

[0069] A sample 140 suitable for laser induced breakdown spectroscopy analysis is obtained.

[0070] In some embodiments, in step S11, the ore is crushed into powder with a particle size ranging from 20 to 70 μm, for example, 70 μm.

[0071] In some embodiments, in step S12, the powder can be prepared into a regular disc sample 140 with a flat surface and uniform size by a tablet press. In some embodiments, the disc can have a diameter of 30 mm and a thickness of 5 mm.

[0072] In some embodiments, in step S40, the relationship between the content of uranium in the standard sample 150 and the peak signal intensity of the laser beam at the predetermined target wavelength conforms to the following relationship:

[0073] (1).

[0074] In the formula, Indicates the laser beam peak signal intensity of uranium element in standard sample 150; Indicates the content of uranium in standard sample 150; represents a constant; Represents a constant.

[0075] In this embodiment, the relationship between the uranium content in the standard sample 150 and the laser beam peak signal intensity at its predetermined target wavelength can be used to determine the relationship (1) between the uranium content and its laser beam peak signal intensity, so that the uranium content in the sample 140 can be accurately determined based on the relationship (1) and the laser beam peak signal intensity of the uranium element in the sample 140.

[0076] In some embodiments, in step S40, the following steps are also included:

[0077] S41: Determine the peak signal intensity of laser beams of the standard sample 150 according to a plurality of laser induced breakdown spectra.

[0078] S42: Determine a curve of the relationship between the laser beam peak signal intensity and the uranium element content according to the laser beam peak signal intensity of the standard sample 150 and the uranium element content in the standard sample 150 .

[0079] S43: Determine a relationship between the uranium content and the laser beam peak signal intensity based on a curve showing the relationship between the laser beam peak signal intensity and the uranium content.

[0080] The curve of the relationship between the laser beam peak signal intensity and the uranium element content is determined based on multiple laser induced breakdown spectra to avoid accidental errors in the experiment and accurately determine the relationship between the laser beam peak signal intensity and the uranium element content, thereby ensuring the reliability of the relationship between the X-ray peak signal intensity and the reference element concentration (1).

[0081] In some embodiments, the curve of the relationship between the laser beam peak signal intensity and the uranium content is a straight line. The intercept and slope of the curve of the relationship between the laser beam peak signal intensity and the uranium content are respectively the constants in the relationship (1): With constant .

[0082] In some embodiments, the target wavelength of uranium is selected to be 409.0 nm to quickly and accurately determine the laser ray peak of element uranium and its corresponding signal intensity in the laser induced breakdown spectrum of the standard sample 150 or the sample 140 .

[0083] In some embodiments, in step S30, it further includes: setting a timing controller 130 to adjust the frequency of the TTL signal emitted by the laser 40 and the time interval from when the spectrometer receives the TTL signal to when the spectrum signal is collected. In some embodiments, the frequency of the TTL trigger signal emitted by the laser 40 is set to be consistent with the frequency of the laser 40 emitting the laser 10. In some embodiments, the time interval is set to 1 μs, so that the spectrometer collects after the spectrum signal is stable, thereby ensuring the reliability of the laser induced breakdown spectrum.

[0084] In some embodiments, step S30 further includes: setting a measurement and control system to control the operation of the laser 40 , the spectrometer 80 , the RF power supply 30 , the coil 20 , the water cooler 50 and the coordinate module 120 .

[0085] The following is a specific example to further illustrate the process of determining the uranium content in the ore using the method of the present invention.

[0086] Example 1

[0087] In this embodiment: a Nd:YAG laser is selected, and the laser pulse width is about 10 ns; 409 nm is selected as the target wavelength of uranium element.

[0088] The uranium-containing ore is crushed into powder with a particle size of about 70 μm, and the powder is prepared into a regular round ore sample 140 with a diameter of 30 mm, a thickness of 5 mm and a flat surface by a tablet press.

[0089] The ore sample 140 is placed on the sample stage 110. The reflector 90 and the lens 100 are set, and the positions of the sample stage 110 and the sample 140 are adjusted by the coordinate module 120 so that the focus of the laser 10 is located on the surface of the sample 140. The distance between the light collecting lens 60 and the sample 140 is adjusted.

[0090] The spectrometer was powered on for 30 min and allowed to stabilize.

[0091] The operating parameters of the laser 40 are set as follows: the wavelength of the laser 10 is 1064 nm, the energy of the laser 10 is 150 mJ, and the frequency of the laser 10 is 10 Hz.

[0092] Set the working parameters of spectrometer 80: detection wavelength range is 409nm±50nm, integration time is 5ms.

[0093] Set the synchronous trigger signal: TTL signal frequency is 10Hz, interval time is 1μs.

[0094] Turn on the water cooler 50 and introduce circulating cooling water.

[0095] The working parameters of the RF power supply 30 are set as follows: the frequency of the RF power supply 30 is 0.1 MHz, and the power of the RF power supply 30 is 1.0 KW. The number of turns of the coil 20 is set as 7. The RF power supply 30 is turned on to put the coil 20 in working state.

[0096] The laser 40 is turned on, and the laser 40 emits the laser 10 and the TTL signal, so that the laser 40 and the spectrometer 80 are in the same frequency working mode.

[0097] Select 409.0 nm as the target wavelength for uranium, and record the laser beam peak signal intensity corresponding to the target wavelength of 409.0 nm for sample 140, which is denoted as Y0.

[0098] Similarly, the ore standard samples 150 with different uranium contents are measured according to the above steps. The uranium contents of the standard samples 150 are recorded as C1, C2, ...; the laser beam peak signal intensities corresponding to the target wavelength 409.0 nm of the standard samples 150 are recorded as Y1, Y2, .... A correlation curve between the uranium content and the laser beam peak signal intensity is established, and the relationship between the uranium content and the laser beam peak signal intensity (1) is obtained.

[0099] Substituting the laser beam peak signal intensity Y0 of the sample 140 into the above relationship (1), the uranium content C0 in the uranium-containing ore sample 140 is obtained.

[0100] Example 2

[0101] In this embodiment: a Nd:YAG laser is selected, and the pulse width of laser 10 is about 600 ps; 409 nm is selected as the target wavelength of uranium element.

[0102] The uranium-containing ore is crushed into powder with a particle size of about 70 μm, and the powder is prepared into a regular round ore sample 140 with a diameter of 30 mm, a thickness of 5 mm and a flat surface by a tablet press.

[0103] The ore sample 140 is placed on the sample stage 110. The reflector 90 and the lens 100 are set, and the positions of the sample stage 110 and the sample 140 are adjusted by the coordinate module 120 so that the focus of the laser 10 is located on the surface of the sample 140. The distance between the light collecting lens 60 and the sample 140 is adjusted.

[0104] The spectrometer was powered on for 30 min and allowed to stabilize.

[0105] The operating parameters of the laser 40 are set as follows: the wavelength of the laser 10 is 1064 nm, the energy of the laser 10 is 100 mJ, and the frequency of the laser 10 is 5 Hz.

[0106] Set the working parameters of spectrometer 80: detection wavelength range is 409nm±50nm, integration time is 5ms.

[0107] Set the synchronous trigger signal: TTL signal frequency is 5Hz, interval time is 1μs.

[0108] Turn on the water cooler 50 and introduce circulating cooling water.

[0109] The working parameters of the RF power supply 30 are set as follows: the frequency of the RF power supply 30 is 27 MHz, and the power of the RF power supply 30 is 1.2 KW. The number of turns of the coil 20 is set as 3. The RF power supply 30 is turned on to put the coil 20 in working state.

[0110] The laser 40 is turned on, and the laser 40 emits the laser 10 and the TTL signal, so that the laser 40 and the spectrometer 80 are in the same frequency working mode.

[0111] Select 409.0 nm as the target wavelength for uranium, and record the laser beam peak signal intensity corresponding to the target wavelength of 409.0 nm for sample 140, which is denoted as Y0.

[0112] Similarly, the ore standard samples 150 with different uranium contents are measured according to the above steps. The uranium contents of the standard samples 150 are recorded as C1, C2, ...; the laser beam peak signal intensities corresponding to the target wavelength 409.0 nm of the standard samples 150 are recorded as Y1, Y2, .... A correlation curve between the uranium content and the laser beam peak signal intensity is established, and the relationship between the uranium content and the laser beam peak signal intensity (1) is obtained.

[0113] Substituting the laser beam peak signal intensity Y0 of the sample 140 into the above relationship (1), the uranium content C0 in the uranium-containing ore sample 140 is obtained.

[0114] Example 3

[0115] In this embodiment: a Nd:YAG laser is selected, and the laser pulse width is about 10 ns; 409 nm is selected as the target wavelength of uranium element.

[0116] The uranium-containing ore is crushed into powder with a particle size of about 70 μm, and the powder is prepared into a regular round ore sample 140 with a diameter of 30 mm, a thickness of 5 mm and a flat surface by a tablet press.

[0117] The ore sample 140 is placed on the sample stage 110. The reflector 90 and the lens 100 are set, and the positions of the sample stage 110 and the sample 140 are adjusted by the coordinate module 120 so that the focus of the laser 10 is located on the surface of the sample 140. The distance between the light collecting lens 60 and the sample 140 is adjusted.

[0118] The spectrometer was powered on for 30 min and allowed to stabilize.

[0119] The operating parameters of the laser 40 are set as follows: the wavelength of the laser 10 is 532 nm, the energy of the laser 10 is 300 mJ, and the frequency of the laser 10 is 20 Hz.

[0120] Set the working parameters of spectrometer 80: detection wavelength range is 409nm±50nm, integration time is 5ms.

[0121] Set the synchronous trigger signal: TTL signal frequency is 20Hz, interval time is 1μs.

[0122] Turn on the water cooler 50 and introduce circulating cooling water.

[0123] The working parameters of the RF power supply 30 are set as follows: the frequency of the RF power supply 30 is 2.4 GHz, and the power of the RF power supply 30 is 1.0 KW. The number of turns of the coil 20 is set as 7. The RF power supply 30 is turned on to put the coil 20 in working state.

[0124] The laser 40 is turned on, and the laser 40 emits the laser 10 and the TTL signal, so that the laser 40 and the spectrometer 80 are in the same frequency working mode.

[0125] Select 409.0 nm as the target wavelength for uranium, and record the laser beam peak signal intensity corresponding to the target wavelength of 409.0 nm for sample 140, which is denoted as Y0.

[0126] Similarly, the ore standard samples 150 with different uranium contents are measured according to the above steps. The uranium contents of the standard samples 150 are recorded as C1, C2, ...; the laser beam peak signal intensities corresponding to the target wavelength 409.0 nm of the standard samples 150 are recorded as Y1, Y2, .... A correlation curve between the uranium content and the laser beam peak signal intensity is established, and the relationship between the uranium content and the laser beam peak signal intensity (1) is obtained.

[0127] Substituting the laser beam peak signal intensity Y0 of the sample 140 into the above relationship (1), the uranium content C0 in the uranium-containing ore sample 140 is obtained.

[0128] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0129] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for determining the uranium content in an ore, characterized in that: It includes the following steps: S10: preparing a sample of the ore, wherein the sample includes uranium; S20: preparing a standard sample of the ore, wherein the standard sample includes the uranium element and the content of the uranium element is known; S30: irradiating the sample and the standard sample with laser using a laser induced breakdown spectroscopy device to obtain a laser induced breakdown spectrum diagram; S40: determining the relationship between the content of the uranium element and the peak signal intensity of the laser beam according to the laser induced breakdown spectrum and the content of the uranium element in the standard sample; S50: Determine the content of the uranium element in the sample according to the relationship determined in step S40 and the laser beam peak signal intensity of the sample, wherein: In step S30, the laser irradiates the standard sample or the plasma generated by the sample; In step S30, Arranging a coil on the standard sample or the sample, and connecting the coil to a radio frequency power source so that the coil generates an inductance effect on the standard sample or the sample to enhance the plasma; Cooling the coil while the coil is energized; In step S30, the distance between the light-collecting lens of the laser induced breakdown spectroscopy device and the standard sample or the sample is set so that the spectral signal emitted by the plasma can be transmitted to the spectrometer of the laser induced breakdown spectroscopy device with maximum efficiency.

2. The method according to claim 1, characterized in that In step S30, The wavelength, energy and frequency of the laser, the frequency and power of the radio frequency power supply and the number of turns of the coil are set so that the plasma can be enhanced to a desired level.

3. The method according to claim 2, characterized in that The wavelength of the laser is set to 1064nm, the energy of the laser is set to 150mJ, the frequency of the laser is set to 10Hz, the frequency of the RF power supply is set to 0.1MHz, the power of the RF power supply is set to 1.0KW, and the number of turns of the coil is set to 7.

4. The method according to any one of claims 1 to 3, characterized in that: In step S10, the following steps are also included: S11: preparing the ore into powder; S12: Form the powder into a disk shape to obtain the sample.

5. The method according to claim 1, characterized in that In step S40, the relationship between the content of the uranium element in the standard sample and the peak signal intensity of the laser beam at the predetermined target wavelength conforms to the following relationship: ； In the formula, Indicates the laser ray peak signal intensity of the uranium element in the standard sample; Indicates the content of the uranium element in the standard sample; represents a constant; Represents a constant.

6. The method according to claim 5, characterized in that In step S40, the following steps are also included: S41: determining the peak signal intensity of the laser ray of the standard sample according to the plurality of laser induced breakdown spectra; S42: determining a curve of the relationship between the laser beam peak signal intensity and the uranium element content according to the laser beam peak signal intensity of the standard sample and the uranium element content in the standard sample; S43: Determine a relationship between the content of the uranium element and the peak signal intensity of the laser beam according to a curve showing the relationship between the peak signal intensity of the laser beam and the content of the uranium element.

7. The method according to claim 5 or 6, characterized in that: The target wavelength of the uranium element is selected to be 409.0 nm.

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