Determination of material composition of in-situ leaching samples

Abstract

The present application provides a method for determining the material composition of an in-situ leached sample, which belongs to the technical field of process mineralogy. The traditional measurement method mainly performs sample pretreatment through the sampling-grinding-reduction mode, and finally only takes a small amount of the reduced sample to prepare the automatic mineralogical analysis sample for analysis, which inevitably leads to insufficient sample representativeness and large data deviation. The present application pretreats and screens the in-situ leached samples, and then prepares samples in layers, and reprocesses the samples prepared in different layers separately, tests them separately through automatic mineralogy, and then calculates the content of each component in the in-situ leached sample; the present application designs a sample processing and analysis test method based on the characteristics that the mineral composition of the in-situ leached sample is complex, and when preparing the automatic mineralogical analysis sample, the sedimentation and stratification are obvious, which easily leads to insufficient sample representativeness, so as to accurately measure the content of each component in the in-situ leached sample.

Description

Technical Field

[0001] The invention relates to the technical field of process mineralogy, and in particular to a method for determining the material composition of an in-situ leached sample. Background Art

[0002] The application scenarios of in-situ leaching technology are constantly expanding, especially for current low-grade mineral resources. Although low-grade mineral resources have a large volume, their economic value per unit is low. If conventional mining and processing methods are used, the economic value is not high, resulting in low utilization of these mineral resources.

[0003] In-situ leaching technology has the technical characteristics of small-scale mining, on-site processing, and in-situ production of final products. It can solve the drawbacks of low-grade mineral resource utilization. However, there are many difficulties in the research of in-situ leaching technology. Among them, process mineralogy is the basic research in mining research. When analyzing such processes, the material composition analysis of the samples has the problem of insufficient sample representativeness, and the applicability of the original test and analysis methods is difficult to meet the requirements.

[0004] In-situ leaching research requires measuring a large number of samples to accurately determine the sample's composition, a fundamental key data, in order to determine the key parameters that govern the process's technical conditions. However, due to the specific nature of in-situ leaching, the sample mass is large, the experimental cycle is long, and the experimental conditions are complex. The traditional sample preparation method (sampling-grinding-reduction) ultimately results in only a few grams of sample for automated mineralogical analysis. This inevitably results in insufficient sample representativeness, a single analytical method, and significant data deviations. This has become a fundamental constraint on in-situ leaching research in the field of process mineralogy. Summary of the Invention

[0005] In view of the technical problems existing in the background technology, the present application provides a method for determining the material composition of in-situ leached samples, aiming to solve the problems of insufficient sample representativeness, single analysis method and large data deviation in the existing in-situ leached sample material composition analysis and testing methods during sample preparation.

[0006] The present application provides a method for determining the composition of an in-situ leached sample, comprising the following steps:

[0007] S1 take the dried sample to be tested ag, then crushed and sieved to obtain an oversize sample a1 and an undersize sample a2, the mass of the oversize sample a1 is a1'g, the mass of the undersize sample a2 is a2'g;

[0008] S2. The sieve sample a1 is mixed with a thermosetting mounting material and cured to obtain a sample a11;

[0009] S3. The sample a11 is cut obliquely to obtain a cut sample, and then the cut sample is subjected to a first mixing and curing to obtain a first mixed sample a111;

[0010] S4. Automated mineralogical analysis of the sample a111 is performed, and the measured mineral content is M1i; wherein i = 1, 2, ..., n, and n is the total number of mineral types measured;

[0011] S5 the undersize sample a2 was ground, a second mixing and curing to obtain a sample a21, and then the sample a21 was cut twice in the vertical direction to obtain left, right and middle three samples b1, b2 and b3;

[0012] S6. The samples b1, b2 and b3 were subjected to initial grinding, third mixing and curing to obtain samples b11, b21 and b31, respectively;

[0013] S7. The samples b11, b21 and b31 were polished and carbon-sprayed to obtain samples b12, b22 and b32, respectively;

[0014] S8. Performing automated mineralogical analysis on samples b12, b22, and b32; wherein the analysis surface of samples b12 and b22 is a complete plane, and the analysis surface of sample b32 is a plurality of rectangular surfaces, and the test direction of the plurality of rectangular surfaces is from top to bottom; the mineral contents of samples b12, b22, and b32 are measured to be H12i, H22i, and Hmi, respectively; wherein m = 1, 2, ..., N, where N is the number of the rectangle tested, and i = 1, 2, ..., n, where n is the total number of mineral types measured;

[0015] S9. Calculate the mineral content M2i, then M2i=K*(H12i+H22i+ ) / (N+2), where K is the correction factor, K=0.5*(H12i / H1i+H22i / HNi);

[0016] S10. Calculate the mineral content Mi in the sample to be tested, where Mi=(a1'*M1i+a2'*M2i) / a.

[0017] In the technical solution of the embodiment of the present application, the present application pre-treats and screens the in-situ leaching samples, and then prepares samples in layers, and re-processes and prepares samples for the samples prepared in different layers, and tests them separately through automatic mineralogy, and then calculates the content of each component in the in-situ leaching samples. Among them, the upper layer samples are prepared by oblique cutting to ensure that the number of samples tested is as large as possible and the types of minerals measured are complete. The lower layer samples are cut into three parts, and the upper surface, lower surface and side are tested respectively. Measuring the upper and lower surfaces can ensure that only minerals floating on the upper surface and only sinking to the bottom surface can be measured. A correction coefficient is introduced into the side test to simultaneously measure the content of minerals in the middle layer, and finally accurately measure the content of each substance in the in-situ leaching sample. According to the characteristics that the mineral composition of the in-situ leaching sample is complex, and when preparing the automatic mineralogical analysis sample, the sedimentation and stratification are obvious, which easily leads to insufficient representativeness of the sample sampling, the present application designs a sample processing and analysis test method to accurately measure the content of each component in the in-situ leaching sample.

[0018] In some embodiments, in step S1, the sample to be tested is an in-situ leaching field sample, the mass a of the sample to be tested is not less than 3000 g, the crushing is a crushing particle size less than 5 mm, and the sieve hole diameter of the screening is 1-2 mm.

[0019] In this embodiment, the larger in-situ leaching field samples are divided into smaller samples by crushing, and then sieved to further separate particles of different sizes for subsequent processing.

[0020] In some embodiments, in step S2, the thermosetting inlay is a thermosetting phenolic epoxy resin, the particle size of the thermosetting inlay is 1-10 mm, and the mass ratio of the oversize sample a1 to the thermosetting inlay is 1:1.5-1:2.

[0021] In this embodiment, by mixing the sample on the sieve with the thermosetting embedding material in a certain proportion, the particles of the sample on the sieve can be fixed without sedimentation or movement.

[0022] In some embodiments, in step S3, the included angle between the cutting angle of the inclined cutting and the horizontal direction is 30°~60°, and the cutting surface of the inclined cutting passes through the upper and lower surfaces of the sample a11; the first mixing of glue is: placing the cutting surface of the sample a11 downward, adding colloid, and ultrasonically vibrating for 10 minutes.

[0023] In this embodiment, the oblique cutting increases the measurement area compared with the horizontal cutting surface, and also increases the number of measured particles under the same measurement conditions; compared with the vertical cutting, the oblique cutting increases the probability of the measured particles appearing, so that each particle size has an equal probability of appearing in the horizontal and vertical directions, ensuring the representativeness of the sample.

[0024] In some embodiments, in step S4, in the automatic mineralogical analysis of the sample a111, the magnification of the automatic mineralogical analysis is 10 to 100 times, and the number of tested particles is greater than 10,000.

[0025] In this embodiment, the mineral analysis test results of the oblique cross section of the above-sieve sample are obtained by performing automatic mineralogical analysis on the sample a111.

[0026] In some embodiments, in step S5, the particle size of the ground ore is no greater than 74 μm, and the second colloid mixing comprises: adding the colloid to the ground sample and ultrasonically vibrating for more than 20 minutes.

[0027] In this embodiment, after crushing and screening, the particles under the screen are still relatively large. A sample with a smaller particle size is obtained by grinding, which makes the particles less likely to settle. The particles are distributed more evenly through mixing and ultrasonic vibration.

[0028] In some embodiments, in step S6, the initial grinding surfaces of the samples b1, b2 and b3 are the upper surface, lower surface and side surface, respectively, the initial grinding pressure is 3~6N, the initial grinding speed is 150~250rmp, the particle size of the abrasive for initial grinding is not less than 1000 mesh, the initial grinding time of the upper and lower surfaces is less than 1 min, and the initial grinding time of the side surface is 1~3min; the third mixing of glue is: the upper surface, lower surface and side surface of the samples b1, b2 and b3 are respectively facing down, the colloid is added, and ultrasonic vibration is performed for more than 20 minutes. In step S7, during the grinding and polishing, the particle size of the abrasive is not greater than 6μm, and the grinding time is not greater than 5min; the particle size of the polishing material is not greater than 1μm, and the polishing time is not greater than 5min.

[0029] In this embodiment, the upper surface, lower surface and side surfaces of the vertically cut samples b1, b2 and b3 are initially ground to expose the test surface particles, and then mixed with glue, polished and carbon sprayed to prepare automatic mineralogical analysis samples on the three surfaces respectively. This ensures that the minerals that only float on the surface and only sink to the bottom surface can be measured, and the minerals that settle in the middle layer can also be measured, making the test samples more representative.

[0030] In some embodiments, in step S8, the complete plane is rectangular or circular; the multiple rectangular surfaces are equidistantly distributed from top to bottom, the long sides of the multiple rectangular surfaces are parallel and equal to the bottom side of the cutting surface of b3, the rectangle sequence number N≥5, and the width of the multiple rectangular surfaces is 10~20 times the average particle size of 5~10 largest particles in the field of view; in step S8, in the automatic mineralogical analysis of the samples b12, b22 and b32, the magnification of the automatic mineralogical analysis test is 500~1000 times, and the number of particles tested is 30,000~50,000.

[0031] In this embodiment, automatic mineralogical analysis is performed on the side surface divided into multiple rectangles parallel to the horizontal direction from top to bottom as test surfaces. The correction coefficient can be calculated based on the test results of the top and bottom layers and the test results of the upper and lower surfaces of samples b1 and b2, so that the mineral content in the undersize sample can be obtained.

[0032] 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

[0033] 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.

[0034] Figure 1 This is a flow chart of the measurement method for the method for determining the material composition of the in-situ leached sample in Example 1. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0038] 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.

[0039] To address the problems of insufficient sample representativeness, single analytical methods, and large data deviations in existing in-situ leached sample material composition analysis and testing methods, this application provides a method for determining the material composition of in-situ leached samples. Traditional measurement methods mainly pre-treat samples through a sampling-grinding-reduction model, ultimately taking only a small amount of the reduced sample to prepare the sample for automated mineralogical analysis. This inevitably leads to insufficient sample representativeness and large data deviations. The present application pre-treats and screens the in-situ leaching samples, and then prepares samples in layers. The samples prepared in different layers are re-processed and sampled respectively, and are tested separately by automatic mineralogy. Then, the content of each component in the in-situ leaching samples is calculated. Among them, the upper layer samples are prepared by oblique cutting to ensure that the number of samples tested is as large as possible and the types of minerals measured are complete. The lower layer samples are cut into three parts, and the upper surface, lower surface and side are tested respectively. Measuring the upper and lower surfaces can ensure that only minerals floating on the upper surface and only sinking to the bottom surface can be measured. A correction coefficient is introduced into the side test to measure the content of minerals in the middle layer at the same time, and finally the content of each substance in the in-situ leaching sample is accurately measured. Based on the characteristics that the mineral composition of the in-situ leaching sample is complex, and when preparing the sample for automatic mineralogical analysis, the sedimentation and stratification are obvious, which easily leads to insufficient representativeness of the sample sampling, the present application designs a sample processing and analysis test method to accurately measure the content of each component in the in-situ leaching sample.

[0040] The present application provides a method for determining the composition of an in-situ leached sample, comprising the following steps:

[0041] S1 take the dried sample to be tested ag, then crushed and sieved to obtain an oversize sample a1 and an undersize sample a2, the mass of the oversize sample a1 is a1'g, the mass of the undersize sample a2 is a2'g;

[0042] S2. The sieve sample a1 is mixed with a thermosetting mounting material and cured to obtain a sample a11;

[0043] S3. The sample a11 is cut obliquely to obtain a cut sample, and then the cut sample is subjected to a first mixing and curing to obtain a first mixed sample a111;

[0044] S4. Automated mineralogical analysis of the sample a111 is performed, and the measured mineral content is M1i; wherein i = 1, 2, ..., n, and n is the total number of mineral types measured;

[0045] S5 the undersize sample a2 was ground, a second mixing and curing to obtain a sample a21, and then the sample a21 was cut twice in the vertical direction to obtain left, right and middle three samples b1, b2 and b3;

[0046] S6. The samples b1, b2 and b3 were subjected to initial grinding, third mixing and curing to obtain samples b11, b21 and b31, respectively;

[0047] S7. The samples b11, b21 and b31 were polished and carbon-sprayed to obtain samples b12, b22 and b32, respectively;

[0048] S8. Performing automated mineralogical analysis on samples b12, b22, and b32; wherein the analysis surface of samples b12 and b22 is a complete plane, and the analysis surface of sample b32 is a plurality of rectangular surfaces, and the test direction of the plurality of rectangular surfaces is from top to bottom; the mineral contents of samples b12, b22, and b32 are measured to be H12i, H22i, and Hmi, respectively; wherein m = 1, 2, ..., N, where N is the number of the rectangle tested, and i = 1, 2, ..., n, where n is the total number of mineral types measured;

[0049] S9. Calculate the mineral content M2i, then M2i=K*(H12i+H22i+ ) / (N+2), where K is the correction factor, K=0.5*(H12i / H1i+H22i / HNi);

[0050] S10. Calculate the mineral content Mi in the sample to be tested, where Mi=(a1'*M1i+a2'*M2i) / a.

[0051] In the technical solution of the embodiment of the present application, the in situ leaching sample is pretreated and screened, and then layered and sampled, and the samples prepared in different layers are reprocessed and sampled respectively, and tested separately by automatic mineralogy, and then the content of each component in the in situ leaching sample is calculated, wherein the upper layer sample is prepared by an oblique cutting method to ensure that the number of samples tested is as large as possible and the types of minerals measured are complete. The lower layer sample is cut into three parts, and the upper surface, lower surface and side are tested respectively. Measuring the upper and lower surfaces can ensure that only minerals floating on the upper surface and only sinking to the bottom surface can be measured. A correction coefficient is introduced into the side test to measure the content of minerals in the middle layer at the same time, and finally the content of each substance in the in situ leaching sample is accurately measured; based on the characteristics that the mineral composition of the in situ leaching sample is complex, and when preparing the automatic mineralogical analysis sample, the sedimentation and stratification are obvious, which easily leads to insufficient representativeness of the sample sampling, the present application designs a sample processing and analysis test method to accurately measure the content of each component in the in situ leaching sample.

[0052] Furthermore, in some embodiments, in step S1, the sample to be tested is an in-situ leaching field sample, the mass a of the sample to be tested is not less than 3000 g, the crushing is a crushing particle size less than 5 mm, and the sieve hole diameter of the screening is 1-2 mm.

[0053] In the technical solution of the embodiment of the present application, the larger in-situ leaching field samples are divided into smaller samples by crushing, and then sieved to further separate particles of different particle sizes for subsequent processing.

[0054] Furthermore, in some embodiments, in step S2, the thermosetting inlay is a thermosetting phenolic epoxy resin, the particle size of the thermosetting inlay is 1-10 mm, and the mass ratio of the oversize sample a1 to the thermosetting inlay is 1:1.5-1:2.

[0055] In the technical solution of the embodiment of the present application, by mixing the sample on the sieve with the thermosetting embedding material in a certain proportion, the particles of the sample on the sieve can be fixed without sedimentation or movement.

[0056] Furthermore, in some embodiments, in step S3, the included angle between the cutting angle of the inclined cutting and the horizontal direction is 30°~60°, and the cutting surface of the inclined cutting passes through the upper and lower surfaces of the sample a11; the first mixing of glue is: placing the cutting surface of the sample a11 downward, adding colloid, and ultrasonically vibrating for 10 minutes.

[0057] In the technical solution of the embodiment of the present application, the inclined cutting increases the measurement area compared with the horizontal cutting surface, and also increases the number of measured particles under the same measurement conditions; compared with the vertical cutting, the inclined cutting increases the probability of the measured particles appearing, so that each particle size has an equal probability of appearing in the horizontal and vertical directions, ensuring the representativeness of the sample.

[0058] Furthermore, in some embodiments, in step S4, in the automatic mineralogical analysis of the sample a111, the magnification of the automatic mineralogical analysis is 10 to 100 times, and the number of tested particles is greater than 10,000.

[0059] In the technical solution of the embodiment of the present application, the mineral analysis test results of the oblique cross section of the sample on the sieve are obtained by performing automatic mineralogical analysis on the sample a111.

[0060] Furthermore, in some embodiments, in step S5, the particle size of the ground ore is not greater than 74 μm, and the second colloid mixing comprises: adding the colloid to the ground sample and ultrasonically vibrating for more than 20 minutes.

[0061] In the technical solution of the embodiment of the present application, after crushing and screening, the particles under the screen are still relatively large. A sample with a smaller particle size is obtained by grinding, which makes the particles less likely to settle. The particles are distributed more evenly through mixing and ultrasonic vibration.

[0062] Furthermore, in some embodiments, in step S6, the initial grinding surfaces of the samples b1, b2 and b3 are the upper surface, the lower surface and the side surface, respectively, the initial grinding pressure is 3~6N, the initial grinding speed is 150~250rmp, the particle size of the abrasive for initial grinding is not less than 1000 mesh, the initial grinding time of the upper and lower surfaces is less than 1 min, and the initial grinding time of the side surface is 1~3min; the third mixing of glue is: the upper surface, lower surface and side surface of the samples b1, b2 and b3 are respectively facing down, the colloid is added, and ultrasonic vibration is performed for more than 20 minutes. In step S7, during the grinding and polishing, the particle size of the abrasive is not greater than 6μm, and the grinding time is not greater than 5min; the particle size of the polishing material is not greater than 1μm, and the polishing time is not greater than 5min.

[0063] In the technical solution of the embodiment of the present application, the upper surface, lower surface and side surfaces of the vertically cut samples b1, b2 and b3 are initially ground to expose the test surface particles, and then mixed with glue, polished and carbon sprayed to prepare automatic mineralogical analysis samples on the three surfaces respectively. This can ensure that the minerals that only float on the surface and only sink to the bottom surface can be measured, and the minerals that settle in the middle layer can also be measured, making the test samples more representative.

[0064] Furthermore, in some embodiments, in step S8, the complete plane is rectangular or circular; the multiple rectangular surfaces are equidistantly distributed from top to bottom, the long sides of the multiple rectangular surfaces are parallel and equal to the bottom side of the cutting surface of b3, the rectangle sequence number N≥5, and the width of the multiple rectangular surfaces is 10~20 times the average particle size of 5~10 largest particles in the field of view; in step S8, in the automatic mineralogical analysis of the samples b12, b22 and b32, the magnification of the automatic mineralogical analysis test is 500~1000 times, and the number of particles tested is 30,000~50,000.

[0065] In the technical solution of the embodiment of the present application, automatic mineralogical analysis is performed on the side surface divided into multiple rectangles parallel to the horizontal direction from top to bottom as test surfaces. The correction coefficient can be calculated by the test results of the top and bottom layers and the test results of the upper and lower surfaces of samples b1 and b2, so that the mineral content in the sample under the sieve can be obtained.

[0066] 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.

[0067] Example 1

[0068] This embodiment provides a method for determining the composition of in-situ leached samples. Figure 1 As shown, the specific steps include:

[0069] (1) Weigh 5000 g of the naturally dried sample to be tested, crush it to obtain particles with a maximum particle size of less than or equal to 5 mm, and then sieve it with a sieve with a pore size of 2 mm. The mass of the sample a1 above the sieve is 3542 g, and the mass of the sample a2 below the sieve is 1458 g.

[0070] (2) Sample a1 was mixed with a thermosetting phenolic epoxy resin with a strength of 5 mm in a mass ratio of 1:2, and then placed in a mounting machine for curing to obtain sample a11.

[0071] (3) Sample a11 was cut at an angle of 45° to the horizontal plane, with the cut surface passing through the upper and lower surfaces of sample a11. The cut surface of sample a11 was placed downward in the sample preparation mold, and resin glue was added. Ultrasonic vibration was performed for 10 minutes, and after curing, sample a111 was obtained.

[0072] (4) Sample a111 was subjected to automatic mineralogical analysis. The magnification of the test was 25 times, the number of particles tested was 10,000, and the measured mineral content was M1i; wherein, i = 1, 2, ..., n, and n is the total number of mineral types measured. In this embodiment, when i = 1, it is pyrite, and the measured pyrite content is M11 = 4.46%.

[0073] (5) Grind sample a2 to a particle size of no more than 74 μm, add resin glue, ultrasonically vibrate for 20 min, and solidify to obtain sample a21. Cut sample a21 twice in the vertical direction to obtain three samples: left, right, and center: b1, b2, and b3.

[0074] (6) For samples b1, b2 and b3, the upper surface of sample b1 and the lower surface of sample b2 were ground for 1 min, and the side of sample b3 was ground for 2 min using 1000 mesh abrasive at a pressure of 3 N and a rotation speed of 150 rpm. Then, the upper surface, lower surface and side surface of samples b1, b2 and b3 were turned downward, and resin glue was added. Ultrasonic vibration was performed for 20 min and solidified to obtain samples b11, b21 and b31, respectively.

[0075] (7) Samples b11, b21, and b31 were ground with 6 μm abrasive for 3 min, then polished with 1 μm polishing material for 3 min, and then carbon sprayed to obtain samples b12, b22, and b32, respectively.

[0076] (8) Automatic mineralogical analysis was performed on samples b12, b22, and b32. The magnification of the test was 500 times, and the number of particles tested was 30,000. The analysis surface selected for b12 and b22 was a complete rectangle, and the analysis surface selected for sample b32 was a plurality of rectangles with a width of 0.08 mm and parallel to and equal to the bottom edge of the cut surface of sample b3, arranged at equal intervals from top to bottom. The mineral contents in samples b12, b22, and b32 were measured to be H12i, H22i, and Hmi, respectively; wherein m = 1, 2, ..., N, N is the serial number of the rectangle tested, i = 1, 2, ..., n, n is the total number of mineral types measured. In this embodiment, when i = 1, it is pyrite, and N = 5, the results of the pyrite contents H121, H221, and Hm1 in samples b12, b22, and b32 are shown in Table 1.

[0077] Table 1 Test results of pyrite content in samples b12, b22 and b32 in Example 1

[0078]

[0079] (9) Calculate the mineral content M2i, then M2i=K*(H12i+H22i+ ) / (N+2), where K is the correction coefficient, K=0.5*(H12i / H1i+H22i / HNi); in this embodiment, when i=1, it is pyrite. According to the measured data, the correction coefficient K=0.5*(H121 / H11+H221 / H51)=0.5*(4.35 / 4.48+5.22 / 5.10)=0.9973 can be calculated, and the pyrite content M21=K*(H121+H221+H11+H21+H31+H41+H51) / (5+2)=4.76%.

[0080] (10) Calculate the mineral content Mi in the sample to be tested, then Mi = (a1'*M1i+a2'*M2i) / a. In this embodiment, when i = 1, it is pyrite. Then the pyrite content in the sample to be tested M1 = (a1'*M11+a2'*M21) / a = (4.46%*3452+4.76%*1458) / 5000 = 4.55%.

[0081] In summary, this application provides a method for determining the composition of in-situ leached samples. Traditional measurement methods primarily pre-treat samples through a sampling-grinding-reduction process, ultimately requiring only a small amount of the reduced sample to prepare the sample for automated mineralogical analysis. This inevitably results in insufficient sample representativeness and significant data bias. The present application pre-treats and screens the in-situ leaching samples, and then prepares samples in layers. The samples prepared in different layers are re-processed and sampled respectively, and are tested separately by automatic mineralogy. Then, the content of each component in the in-situ leaching samples is calculated. Among them, the upper layer samples are prepared by oblique cutting to ensure that the number of samples tested is as large as possible and the types of minerals measured are complete. The lower layer samples are cut into three parts, and the upper surface, lower surface and side are tested respectively. Measuring the upper and lower surfaces can ensure that only minerals floating on the upper surface and only sinking to the bottom surface can be measured. A correction coefficient is introduced into the side test to measure the content of minerals in the middle layer at the same time, and finally the content of each substance in the in-situ leaching sample is accurately measured. Based on the characteristics that the mineral composition of the in-situ leaching sample is complex, and when preparing the sample for automatic mineralogical analysis, the sedimentation and stratification are obvious, which easily leads to insufficient representativeness of the sample sampling, the present application designs a sample processing and analysis test method to accurately measure the content of each component in the in-situ leaching sample.

[0082] 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 determining the composition of an in-situ leached sample, characterized in that: The following steps are involved: S1 take the dried sample to be tested ag, then crushed and sieved to obtain an oversize sample a1 and an undersize sample a2, the mass of the oversize sample a1 is a1'g, the mass of the undersize sample a2 is a2'g; S2. The sieve sample a1 is mixed with a thermosetting mounting material and cured to obtain a sample a11; S3. The sample a11 is cut obliquely to obtain a cut sample, and then the cut sample is subjected to a first mixing and curing to obtain a first mixed sample a111; S4. Automated mineralogical analysis of the sample a111 is performed, and the measured mineral content is M1i; wherein i = 1, 2, ..., n, and n is the total number of mineral types measured; S5 the undersize sample a2 was ground, a second mixing and curing to obtain a sample a21, and then the sample a21 was cut twice in the vertical direction to obtain left, right and middle three samples b1, b2 and b3; S6. The samples b1, b2 and b3 were subjected to initial grinding, third mixing and curing to obtain samples b11, b21 and b31, respectively; S7. The samples b11, b21 and b31 were polished and carbon-sprayed to obtain samples b12, b22 and b32, respectively; S8. Performing automated mineralogical analysis on samples b12, b22, and b32; wherein the analysis surface of samples b12 and b22 is a complete plane, and the analysis surface of sample b32 is a plurality of rectangular surfaces, and the test direction of the plurality of rectangular surfaces is from top to bottom; the mineral contents of samples b12, b22, and b32 are measured to be H12i, H22i, and Hmi, respectively; wherein m = 1, 2, ..., N, where N is the number of the rectangle tested, and i = 1, 2, ..., n, where n is the total number of mineral types measured; S9. Calculate the mineral content M2i, then M2i=K*(H12i+H22i+ ) / (N+2), where K is the correction factor, K=0.5*(H12i / H1i+H22i / HNi); S10. Calculate the mineral content Mi in the sample to be tested, where Mi=(a1'*M1i+a2'*M2i) / a.

2. The method for determining the material composition of an in-situ leached sample according to claim 1, characterized in that: In step S1, the sample to be tested is an in-situ leaching field sample, the mass a of the sample to be tested is not less than 3000 g, the crushing is performed so that the particle size is less than 5 mm, and the sieve hole diameter of the screening is 1-2 mm.

3. The method for determining the material composition of an in-situ leached sample according to claim 1, wherein: In step S2, the thermosetting inlay material is a thermosetting phenolic epoxy resin, the particle size of the thermosetting inlay material is 1-10 mm, and the mass ratio of the oversize sample a1 to the thermosetting inlay material is 1:1.5-1:

2.

4. The method for determining the material composition of an in-situ leached sample according to claim 1, wherein: In step S3, the angle between the cutting angle of the inclined cutting and the horizontal direction is 30°~60°, and the cutting surface of the inclined cutting passes through the upper and lower surfaces of the sample a11; the first mixing of the glue is: placing the cutting surface of the sample a11 downward, adding colloid, and ultrasonically vibrating for 10 minutes.

5. The method for determining the material composition of an in-situ leached sample according to claim 1, wherein: In step S4, in the automatic mineralogical analysis of the sample a111, the magnification of the automatic mineralogical analysis is 10 to 100 times, and the number of tested particles is greater than 10,000 particles.

6. The method for determining the material composition of an in-situ leached sample according to claim 4, wherein: In step S5, the particle size of the ground ore is not greater than 74 μm, and the second colloid mixing comprises: adding the colloid to the ground sample and ultrasonically vibrating for more than 20 minutes.

7. The method for determining the material composition of an in-situ leached sample according to claim 4, wherein: In step S6, the primary grinding surfaces of the samples b1, b2, and b3 are the upper surface, lower surface, and side surface, respectively. The primary grinding pressure is 3-6N, the primary grinding speed is 150-250 rpm, the particle size of the abrasive for the primary grinding is not less than 1000 mesh, the primary grinding time of the upper and lower surfaces is less than 1 min, and the primary grinding time of the side surface is 1-3 min. The third mixing step is: placing the upper surface, lower surface, and side surface of the samples b1, b2, and b3 facing downward, adding the colloid, and ultrasonically vibrating for more than 20 minutes.

8. The method for determining the material composition of an in-situ leached sample according to claim 1, wherein: In step S7, during the grinding and polishing, the particle size of the abrasive is not greater than 6 μm, and the grinding time is not greater than 5 minutes; the particle size of the polishing material is not greater than 1 μm, and the polishing time is not greater than 5 minutes.

9. The method for determining the material composition of an in-situ leached sample according to claim 1, wherein: In step S8, the complete plane is rectangular or circular; the multiple rectangular surfaces are equidistantly distributed from top to bottom, the long sides of the multiple rectangular surfaces are parallel and equal to the bottom side of the cutting surface of b3, the rectangle sequence number N≥5, and the width of the multiple rectangular surfaces is 10~20 times the average particle size of 5~10 largest particles in the field of view; in step S8, in the automatic mineralogical analysis of the samples b12, b22 and b32, the magnification of the automatic mineralogical analysis test is 500~1000 times, and the number of particles tested is 30,000~50,000.

10. The method for determining the material composition of an in-situ leached sample according to claim 1, wherein: In step S8, in the automatic mineralogical analysis of the samples b12, b22 and b32, the magnification of the automatic mineralogical analysis test is 500-1000 times, and the number of particles tested is 30,000-50,000.

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