Method for locating the same particle before and after gold immersion

Abstract

The present application provides a method for locating the same particle before and after gold leaching, which belongs to the field of particle positioning analysis technology. The present application obtains a heavy sand sample through artificial reselection; then removes sulfides to obtain gold mineral monomers; mixes resin 1, curing agent 1, gangue mineral particles and different pigments, and adds them to molds of different shapes respectively; after the resin is solidified, selects gold minerals in molds of different shapes; then mixes resin 2 and curing agent 2 and adds them to the mold, grinds and polishes, and obtains exposed gold mineral monomer particles, and observes the surface phenomena before and after gold leaching under a stereo microscope and a scanning electron microscope through different colors and shapes, which is used for experimental research on the gold leaching effect of gold leaching agents. The present application introduces different colors and gangue mineral particles into the resin, so that the same gold mineral can be found more quickly after each test, and the phenomena presented before and after gold mineral leaching can be detected, which has guiding significance for the experimental research of gold leaching agents.

Description

Technical Field

[0001] The present invention relates to the technical field of particle positioning analysis, and in particular to a method for positioning the same particle before and after gold immersion. Background Art

[0002] In gold mining, gold leaching is a key extraction technique, primarily involving the dissolution and recovery of gold through chemical solutions. Chemical leaching involves dissolving and recovering gold from ore through chemical reactions, primarily including cyanide, thiourea, and thiosulfate methods. Currently, the effectiveness of these leaching methods is primarily assessed by calculating the leaching rate based on the amount of gold in the leachate. However, this method cannot specifically determine whether the leaching effect is influenced by the reagents or other factors within the ore.

[0003] Process mineralogy research has continuously evolved and improved with the development of the discipline and related analytical and testing technologies. Automated mineralogical analysis equipment, such as the MLA (Automatic Quantitative Analysis System for Mineral Parameters), is widely used in modern process mineralogy research. These devices automatically identify and test minerals based on backscattered image data collected by an electron microscope and combined with the component identification capabilities of energy spectrometry. Process mineralogy research offers the ability to rapidly and accurately derive sample-related data through image analysis of test samples. However, in process mineralogy analysis, it is difficult to quickly locate the same particle sample during secondary testing.

[0004] In view of this, it is necessary to design a method to locate the same particle before and after gold immersion to solve the above problems. Summary of the Invention

[0005] In view of the technical problems existing in the background technology, the present application provides a method for locating the same particle before and after gold leaching, aiming to solve the problems such as the inability to exclude the influence of other factors on the leaching effect of gold leaching agents in the existing gold leaching effect evaluation and the difficulty in quickly finding the same particle sample during the secondary test in process mineralogy analysis.

[0006] This application provides a method for locating the same particle before and after gold immersion, comprising the following steps:

[0007] S1. Gravity separation of the raw ore sample to obtain a heavy sand sample;

[0008] S2. leaching the heavy sand sample to obtain a gold mineral monomer;

[0009] S3. The resin 1, curing agent 1, gangue mineral particles and pigments of different colors are mixed to obtain resins of different colors, the resin 1 and curing agent 1 are mixed to obtain a conventional resin;

[0010] S4. The resins of different colors are added to the grooves of the mold using different patterns of grooves circled, and conventional resin is added to the area outside the grooves of the mold and cured;

[0011] S5. The gold mineral monomer is placed in different patterns of the mold;

[0012] S6. Mix resin 2 and curing agent 2 and add them to all areas of the mold, shake, cure, cool, and polish to obtain the target sample;

[0013] S7. The target sample is placed under a stereo microscope, and photographs are taken of samples in different color regions to obtain Photo 1; photographs are taken of samples in different shapes under a scanning electron microscope to obtain Photo 2;

[0014] S8. The target sample is leached with gold to obtain a sample after leaching with gold;

[0015] S9. The gold-immersed sample was placed under a stereo microscope, and photographs of samples in different color regions were recorded to obtain Photo 3; photographs of samples in different shapes were recorded under a scanning electron microscope to obtain Photo 4;

[0016] S10. Compare the phenomena on the surface of gold particles in Photos 1 and 3, and Photos 2 and 4.

[0017] In the technical solution of the embodiment of the present application, a heavy sand sample is obtained by gravity selection; then sulfides are removed to obtain gold mineral monomers; resin 1, curing agent 1, gangue mineral particles and different pigments are mixed and added to molds of different shapes respectively; after the resin is solidified, gold minerals are selected and placed in molds of different shapes; then resin 2 and curing agent 2 are mixed and added to the molds, and polished to obtain exposed gold mineral monomer particles, which are observed under a stereo microscope and a scanning electron microscope by different colors and shapes before and after gold leaching, respectively, for experimental research on the gold leaching effect of the gold leaching agent. The present application introduces different colors into the resin, and when observed with a stereo microscope, the same gold mineral can be found more quickly after each test through different color areas; by introducing gangue mineral particles into the resin, since the gray value of the gangue mineral is different from the gray value of the resin, the different shapes of the gangue mineral circle can be used to more accurately and quickly find the same gold mineral under a scanning electron microscope, and the phenomena presented before and after gold leaching are detected, which has guiding significance for the experimental research of the gold leaching agent.

[0018] In some embodiments, in step S3, the gangue mineral particles include one or more of quartz, feldspar and calcium carbonate.

[0019] In this embodiment, by adding one or more of quartz, feldspar, and calcium carbonate to the resin, it is possible to ensure that the grayscale of the resin region after adding the above gangue mineral particles is different from that of the resin region without adding the gangue mineral particles. This facilitates the rapid and accurate identification of the same gold mineral by the different shapes circled by the gangue minerals under a scanning electron microscope.

[0020] In some embodiments, in step S4, the graphics include triangles, squares, rectangles, circles and semicircles; the triangle is an equilateral triangle, and the side length of the equilateral triangle is 2~5mm; the side length of the square is 2~5mm; the length of the rectangle is 5~7mm and the width is 2~4mm; the diameter of the circle is 6~8mm, and the width of the groove is 1mm.

[0021] In this embodiment, by circling different patterns in the mold and adding gangue mineral particles, the same gold particle before and after gold immersion can be quickly located under a scanning electron microscope.

[0022] In some embodiments, in step S5, the number of gold mineral particles in different patterns of the mold is 1 to 3, and the size of the gold mineral particles does not exceed the range of the pattern.

[0023] In this embodiment, the gold mineral particles need to be within the range of the pattern in order to find the same gold particles when observing the sample before and after gold immersion through a stereo microscope and a scanning electron microscope. The same gold particles before and after gold immersion cannot be quickly found outside the pattern.

[0024] In some embodiments, in step S2, the liquid-to-solid ratio of the leaching is (5:1) to (15:1) mL / g, the leaching temperature is 40 to 60°C, the leaching time is 2 to 4 hours, and the leaching stirring speed is 200 to 300 r / min.

[0025] In this embodiment, under the leaching conditions, the sulfide can be completely dissolved to obtain gold mineral monomers.

[0026] In some embodiments, in step S1, the mass of the raw ore sample is ≥5 kg, and the gravity separation is manual gravity separation, and the steps of manual gravity separation include: dividing the raw ore into several samples on average, manually re-panning, and then mixing them together to obtain a heavy sand mixed sample.

[0027] In this embodiment, gold is recovered and associated heavy minerals are removed by gravity separation.

[0028] In some embodiments, in step S2, the leaching agents are trifluoroacetic acid and hydrogen peroxide; the concentration of the trifluoroacetic acid is 0.1-1.0 mol / L, and the concentration of the hydrogen peroxide is 3-15%.

[0029] In this example, sulfides in the ore are dissolved by trifluoroacetic acid and hydrogen peroxide.

[0030] In some embodiments, in step S3, the ratio of the resin 1 to the curing agent 1 is 2:1; in step S4, the curing temperature is 40-50°C.

[0031] In this embodiment, sample substrates with different colors and shapes are formed in the mold through curing.

[0032] In some embodiments, in step S6, the ratio of the resin 2 to the curing agent 2 is 2:1, and the curing temperature is 18-22°C.

[0033] In this example, a sample containing gold particles was obtained by adding a resin and a curing agent.

[0034] In some embodiments, in step S6, the grinding and polishing process is: first, using sandpaper with sizes of 240 mesh, 800 mesh, and 1200 mesh for grinding for 8 to 12 minutes respectively; then using polishing cloth with particle sizes of 6 μm, 3 μm, and 1 μm for polishing for 8 to 12 minutes respectively.

[0035] In this embodiment, one side of the gold particles is exposed by grinding and polishing, which facilitates the subsequent gold immersion treatment.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings used in this application. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0038] Figure 1 These are the corresponding scanning electron microscope images and stereo microscope images of different gold particles before and after gold immersion in Example 1.

[0039] Figure 2 These are the corresponding scanning electron microscope images and stereo microscope images of different gold particles before and after gold immersion in Example 2. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only used as examples and are not intended to limit the scope of protection of the present application.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In order to solve the problems that the existing gold leaching effect evaluation cannot exclude the influence of other factors on the leaching effect of gold leaching agents, and the difficulty in quickly finding the same particle sample in the secondary test in process mineralogy analysis, the present application provides a method for locating the same particle before and after gold leaching. A heavy sand sample is obtained by artificial re-selection; then the sulfide is removed to obtain a gold mineral monomer; resin 1, curing agent 1, gangue mineral particles and different pigments are mixed and added to molds of different shapes respectively; after the resin is cured, gold minerals are selected and placed in molds of different shapes; then resin 2 and curing agent 2 are mixed and added to the mold, and polished to obtain exposed gold mineral monomer particles. The surface phenomena before and after gold leaching are observed under a stereo microscope and a scanning electron microscope by different colors and shapes, respectively, for experimental research on the gold leaching effect of gold leaching agents. By introducing different colors into the resin, the present application can more quickly locate the same gold mineral after each test through different color areas when observed with a stereo microscope. By introducing gangue mineral particles into the resin, since the grayscale value of the gangue mineral is different from the grayscale value of the resin, the different shapes of the gangue mineral circles can be used to more accurately and quickly locate the same gold mineral under a scanning electron microscope, detect the phenomena presented by the gold mineral before and after leaching, and thus have guiding significance for the experimental research of gold leaching agents.

[0044] This application provides a method for locating the same particle before and after gold immersion, comprising the following steps:

[0045] S1. Gravity separation of the raw ore sample to obtain a heavy sand sample;

[0046] S2. leaching the heavy sand sample to obtain a gold mineral monomer;

[0047] S3. The resin 1, curing agent 1, gangue mineral particles and pigments of different colors are mixed to obtain resins of different colors, the resin 1 and curing agent 1 are mixed to obtain a conventional resin;

[0048] S4. The resins of different colors are added to the grooves of the mold using different patterns of grooves circled, and conventional resin is added to the area outside the grooves of the mold and cured;

[0049] S5. The gold mineral monomer is placed in different patterns of the mold;

[0050] S6. Mix resin 2 and curing agent 2 and add them to all areas of the mold, shake, cure, cool, and polish to obtain the target sample;

[0051] S7. The target sample is placed under a stereo microscope, and photographs are taken of samples in different color regions to obtain Photo 1; photographs are taken of samples in different shapes under a scanning electron microscope to obtain Photo 2;

[0052] S8. The target sample is leached with gold to obtain a sample after leaching with gold;

[0053] S9. The gold-immersed sample was placed under a stereo microscope, and photographs of samples in different color regions were recorded to obtain Photo 3; photographs of samples in different shapes were recorded under a scanning electron microscope to obtain Photo 4;

[0054] S10. Compare the phenomena on the surface of gold particles in Photos 1 and 3, and Photos 2 and 4.

[0055] In the technical solution of the embodiment of the present application, a heavy sand sample is obtained by gravity selection; then sulfides are removed to obtain gold mineral monomers; resin 1, curing agent 1, gangue mineral particles and different pigments are mixed and added to molds of different shapes respectively; after the resin is solidified, gold minerals are selected and placed in molds of different shapes; then resin 2 and curing agent 2 are mixed and added to the molds, and polished to obtain exposed gold mineral monomer particles, which are observed under a stereo microscope and a scanning electron microscope by different colors and shapes before and after gold leaching, respectively, for experimental research on the gold leaching effect of the gold leaching agent. The present application introduces different colors into the resin, and when observed with a stereo microscope, the same gold mineral can be found more quickly after each test through different color areas; by introducing gangue mineral particles into the resin, since the gray value of the gangue mineral is different from the gray value of the resin, the different shapes of the gangue mineral circle can be used to more accurately and quickly find the same gold mineral under a scanning electron microscope, and the phenomena presented before and after gold leaching are detected, which has guiding significance for the experimental research of the gold leaching agent.

[0056] Furthermore, in some embodiments, in step S3, the gangue mineral particles include one or more of quartz, feldspar and calcium carbonate.

[0057] In the technical solution of the embodiment of the present application, by adding one or more of quartz, feldspar and calcium carbonate to the resin, it is possible to ensure that the grayscale of the resin area after adding the above gangue mineral particles is different from the resin area without adding the gangue mineral particles, so that the same gold mineral can be found quickly and accurately through the different shapes circled by the gangue minerals under a scanning electron microscope.

[0058] Furthermore, in some embodiments, in step S4, the graphics include triangles, squares, rectangles, circles and semicircles; the triangle is an equilateral triangle, and the side length of the equilateral triangle is 2~5mm; the side length of the square is 2~5mm; the length of the rectangle is 5~7mm and the width is 2~4mm; the diameter of the circle is 6~8mm, and the width of the groove is 1mm.

[0059] In the technical solution of the embodiment of the present application, by circling different patterns in the mold and adding gangue mineral particles, the same gold particles before and after gold immersion can be quickly located under a scanning electron microscope.

[0060] Furthermore, in some embodiments, in step S5, the number of gold mineral particles in different patterns of the mold is 1 to 3, and the size of the gold mineral particles does not exceed the range of the pattern.

[0061] In the technical solution of the embodiment of the present application, the gold mineral particles need to be within the range of the pattern in order to find the same gold particles when observing the samples before and after gold immersion through a stereo microscope and a scanning electron microscope. The same gold particles before and after gold immersion cannot be quickly found outside the pattern.

[0062] Furthermore, in some embodiments, in step S2, the liquid-to-solid ratio of the leaching is (5:1) to (15:1) mL / g, the leaching temperature is 40 to 60°C, the leaching time is 2 to 4 hours, and the leaching stirring speed is 200 to 300 r / min.

[0063] In the technical solution of the embodiment of the present application, under the leaching conditions, the sulfide can be completely dissolved to obtain gold mineral monomers.

[0064] Furthermore, in some embodiments, in step S1, the mass of the raw ore sample is ≥5 kg, and the gravity separation is manual gravity separation, and the steps of manual gravity separation include: dividing the raw ore into several samples on average, manually re-panning, and then mixing them together to obtain a heavy sand mixed sample.

[0065] In the technical solution of the embodiment of the present application, gold is recovered and associated heavy minerals are removed by gravity separation.

[0066] Furthermore, in some embodiments, in step S2, the leaching agents are trifluoroacetic acid and hydrogen peroxide; the concentration of the trifluoroacetic acid is 0.1-1.0 mol / L, and the concentration of the hydrogen peroxide is 3-15%.

[0067] In the technical solution of the embodiment of the present application, the sulfide in the ore can be dissolved by trifluoroacetic acid and hydrogen peroxide.

[0068] Furthermore, in some embodiments, in step S3, the ratio of the resin 1 to the curing agent 1 is 2:1; and in step S4, the curing temperature is 40-50°C.

[0069] In the technical solution of the embodiment of the present application, sample bases with different colors and shapes are formed in the mold through curing.

[0070] Furthermore, in some embodiments, in step S6, the ratio of the resin 2 to the curing agent 2 is 2:1, and the curing temperature is 18-22°C.

[0071] In the technical solution of the embodiment of the present application, a sample containing gold particles is obtained by adding resin and curing agent.

[0072] Furthermore, in some embodiments, in step S6, the grinding and polishing process is: first, using sandpaper with sizes of 240 mesh, 800 mesh and 1200 mesh to grind for 8 to 12 minutes respectively; then using polishing cloth with particle sizes of 6 μm, 3 μm and 1 μm to polish for 8 to 12 minutes respectively.

[0073] In the technical solution of the embodiment of the present application, one side of the gold particles is exposed by grinding and polishing, which facilitates subsequent gold immersion treatment.

[0074] Some specific examples are listed below. It should be noted that the examples described below are exemplary and are only used to explain the present application, and should not be construed as limiting the present application. Where specific techniques or conditions are not specified in the examples, the techniques or conditions described in the literature in this area or the product specifications are used. Reagents or instruments used without manufacturer's indication are all commercially available conventional products.

[0075] Example 1

[0076] This embodiment provides a method for locating the same particle before and after gold immersion, specifically comprising the following steps:

[0077] (1) Weigh 5 kg of ore sample, mix it evenly, divide it into five samples, manually re-pan them separately, and then mix them together to obtain a heavy sand mixed sample.

[0078] (2) The obtained heavy sand mixed sample was mixed with trifluoroacetic acid with a concentration of 0.1 mol / L and hydrogen peroxide with a concentration of 3%. The liquid-solid ratio was controlled at (5:1) mL / g. The mixture was stirred at a speed of 200 r / min and leached at 40°C for 2 hours to obtain gold mineral monomers.

[0079] (3) Use a 1mm wide groove to circle an equilateral triangle with a side length of 2mm, a square with a side length of 2mm, a rectangle with a length of 5mm and a width of 2mm, and a circle with a diameter of 6mm in a mold. Mix the resin and curing agent in a mass ratio of 2:1, add calcium carbonate, and then mix them with different colored pigments. Then add them to the grooves of different shapes. Add the resin and curing agent mixture in a mass ratio of 2:1 without calcium carbonate and pigment to the area outside the grooves in the mold. Place the mold in a 40℃ oven to cure. Among them, the four shapes of triangle, square, rectangle, and circle correspond to red, green, blue, and pink respectively. Use a needle to select a gold ore that does not exceed the size of the shape and place it in the mold of the triangle, square, rectangle, and circle.

[0080] (4) The resin and curing agent were mixed in a ratio of 2:1 and added to the mold. The mixture was ultrasonically shaken for 20 minutes and cured in a 40°C oven. After cooling to room temperature, the mixture was ground with sandpaper of 240 mesh, 800 mesh, and 1200 mesh for 10 minutes each. The mixture was then polished with polishing cloth of 6 μm, 3 μm, and 1 μm for 10 minutes each. Surface-exposed gold mineral monomer particle samples were obtained. The surface phenomena were observed under a scanning electron microscope and a stereo microscope, and photographed and recorded.

[0081] (5) The surface-exposed gold mineral monomer particle samples were leached with sodium thiosulfate for a period of time, and then the samples were placed under a scanning electron microscope and a stereo microscope. The same gold particles before leaching were found based on their shape and color, and photographed and recorded respectively.

[0082] (6) Comparing the results of the two photos, it was found that the edges and surfaces of the gold particles did not change much, which indicates that the experimental effect of the gold immersion agent was poor.

[0083] The corresponding scanning electron microscope images and stereo microscope images of different gold particles before and after gold immersion in this embodiment are as follows: Figure 1 shown.

[0084] Depend on Figure 1 From the morphology of gold, it can be seen that the leaching effect of this gold leaching agent is poor.

[0085] Example 2

[0086] Example 2 provides a method for locating the same particle before and after gold leaching. Compared with Example 1, the difference is that the gold leaching agent in step (6) is different. The gold leaching agent is iodine and potassium iodide. The other steps are roughly the same as Example 1 and will not be repeated here.

[0087] The corresponding scanning electron microscope images and stereo microscope images of different gold particles before and after gold immersion in this embodiment are as follows: Figure 2 shown.

[0088] Depend on Figure 2 From the shape of gold, it can be seen that the gold leaching agent has a good gold leaching effect.

[0089] In summary, the present application provides a method for locating the same particle before and after gold leaching. By reselection, a heavy sand sample is obtained; then the sulfide is removed to obtain a gold mineral monomer; resin 1, curing agent 1, gangue mineral particles and different pigments are mixed and added to molds of different shapes respectively; after the resin is solidified, gold minerals are selected and placed in molds of different shapes; then resin 2 and curing agent 2 are mixed and added to the mold, and polished to obtain exposed gold mineral monomer particles. The surface phenomena before and after gold leaching are observed under a stereo microscope and a scanning electron microscope by different colors and shapes, respectively, for experimental research on the gold leaching effect of the gold leaching agent. The present application introduces different colors into the resin. When observed with a stereo microscope, the same gold mineral can be found more quickly after each test through different color areas; by introducing gangue mineral particles into the resin, since the grayscale value of the gangue mineral is different from the grayscale value of the resin, the different shapes of the patterns circled by the gangue mineral can be used to more accurately and quickly find the same gold mineral under a scanning electron microscope, detect the phenomena before and after gold mineral leaching, and thus have guiding significance for the experimental research of the gold leaching agent.

[0090] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A method for locating the same particle before and after gold immersion, characterized in that: The following steps are involved: S1. Gravity separation of the raw ore sample to obtain a heavy sand sample; S2. leaching the heavy sand sample to obtain a gold mineral monomer; S3. The resin 1, curing agent 1, gangue mineral particles and pigments of different colors are mixed to obtain resins of different colors, the resin 1 and curing agent 1 are mixed to obtain a conventional resin; S4. The resins of different colors are added to the grooves of the mold using different patterns of grooves circled, and conventional resin is added to the area outside the grooves of the mold and cured; S5. The gold mineral monomer is placed in different patterns of the mold; S6. Mix resin 2 and curing agent 2 and add them to all areas of the mold, shake, cure, cool, and polish to obtain the target sample; S7. The target sample is placed under a stereo microscope, and photographs are taken of samples in different color regions to obtain Photo 1; photographs are taken of samples in different shapes under a scanning electron microscope to obtain Photo 2; S8. The target sample is leached with gold to obtain a sample after leaching with gold; S9. The gold-immersed sample was placed under a stereo microscope, and photographs of samples in different color regions were recorded to obtain Photo 3; photographs of samples in different shapes were recorded under a scanning electron microscope to obtain Photo 4; S10. Compare the phenomena on the surface of gold particles in Photos 1 and 3, and Photos 2 and 4.

2. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S3, the gangue mineral particles include one or more of quartz, feldspar and calcium carbonate.

3. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S4, the graphics include triangles, squares, rectangles, circles and semicircles; the triangle is an equilateral triangle, and the side length of the equilateral triangle is 2~5mm; the side length of the square is 2~5mm; the length of the rectangle is 5~7mm and the width is 2~4mm; the diameter of the circle is 6~8mm, and the width of the groove is 1mm.

4. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S5, the number of gold mineral particles in different patterns of the mold is 1 to 3, and the size of the gold mineral particles does not exceed the range of the pattern.

5. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S2, the liquid-to-solid ratio of the leaching is (5:1) to (15:1) mL / g, the leaching temperature is 40 to 60°C, the leaching time is 2 to 4 hours, and the leaching stirring speed is 200 to 300 r / min.

6. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S1, the mass of the raw ore sample is ≥5kg, and the gravity separation is manual gravity separation. The steps of the manual gravity separation include: dividing the raw ore into several samples on average, manually re-panning, and then mixing them together to obtain a heavy sand mixed sample.

7. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S2, the leaching agents are trifluoroacetic acid and hydrogen peroxide; the concentration of the trifluoroacetic acid is 0.1-1.0 mol / L, and the concentration of the hydrogen peroxide is 3-15%.

8. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S3, the ratio of the resin 1 to the curing agent 1 is 2:1; in step S4, the curing temperature is 40-50°C.

9. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S6, the ratio of the resin 2 to the curing agent 2 is 2:1, and the curing temperature is 18-22°C.

10. The method for locating the same particle before and after gold immersion according to claim 1, characterized in that: In step S6, the grinding and polishing process is: first, using sandpaper with sizes of 240 mesh, 800 mesh and 1200 mesh to grind for 8 to 12 minutes respectively; then using polishing cloth with particle sizes of 6 μm, 3 μm and 1 μm to polish for 8 to 12 minutes respectively.

Images