Method for determining substance composition of in-situ leached sample

Abstract

The invention provides a method for determining substance composition of an in-situ leached sample, and belongs to the technical field of process mineralogy. According to a traditional measurement method, sample pretreatment is mainly carried out in a sampling-ore grinding-division mode, finally, only a small amount of divided samples are taken to prepare automatic mineralogical analysis samples for analysis, and the problems that the representativeness of the samples is insufficient and the data deviation is large inevitably exist. According to the method, an in-situ leaching sample is pretreated and screened, then layered sample preparation is performed, samples prepared on different layers are subjected to retreatment sample preparation, testing is performed through automatic mineralogy, and then the content of each component in the in-situ leaching sample is calculated; according to the characteristics that an in-situ leaching sample is complex in mineral composition, sedimentation layering is obvious when an automatic mineralogy analysis sample is prepared, and the sampling representativeness of the sample is insufficient, a sample treatment and analysis test method is designed, and the content of each component in the in-situ leaching sample is accurately measured.

Description

Technical Field

[0001] The present invention relates to the technical field of process mineralogy, and particularly to a method for determining the composition of substances in in-situ leaching samples. Background Art

[0002] The application scenarios of in-situ leaching technology are constantly expanding, especially for low-grade mineral resources at present. Although the occurrence volume of low-grade mineral resources is large, their economic value per unit state is low. Using conventional mining and processing methods, the economic value is not high, resulting in low utilization rate of this part of mineral resources.

[0003] The in-situ leaching technology has the technical characteristics of not mining on a large scale, processing locally, and producing the final product in-situ, which can solve the disadvantages of the utilization of low-grade mineral resources. However, there are many problems in the research on in-situ leaching technology. Among them, process mineralogy is the basic research in mining research. When analyzing such processes, there are problems such as insufficient representativeness of samples and difficulty in meeting the requirements of the applicability of the original test analysis methods in the analysis of the composition of substances in samples.

[0004] For the research on in-situ leaching processes, in order to obtain the main parameters that restrict the process technical conditions, a large number of samples need to be measured to accurately determine the basic key data of the composition of substances in the samples. However, due to the particularity of the in-situ leaching process, the sample quality is large, the test cycle is long, and the test conditions are complex. When using the original sample preparation method (sampling - grinding - quartering) mode, when only a few grams of samples are finally taken to prepare automatic mineralogy analysis samples for test analysis, there will inevitably be phenomena such as insufficient representativeness of samples, single analysis method, and large data deviation, which has become the fundamental problem restricting the research on in-situ leaching processes in the direction of process mineralogy. Summary of the Invention

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

[0006] The present application provides a method for determining the composition of substances in in-situ leaching samples, comprising the following steps: S1. Take a g of dry sample to be tested, then break and screen it to obtain an oversize sample a1 and an undersize sample a2. The mass of the oversize sample a1 is a1' g, and the mass of the undersize sample a2 is a2' g; S2. Mix the oversize sample a1 with a thermosetting embedding material and cure it to obtain a sample a11; S3. Tilt and cut the sample a11 to obtain the cut sample, and then perform first mixing of glue and curing on the cut sample to obtain the sample a111 after the first mixing of glue; S4. Perform automatic mineralogical analysis on the sample a111 to measure the content of minerals as M1i; where i = 1, 2,..., n, and n is the total number of types of minerals measured; S5. Grind, perform second mixing of glue and curing on the sample a2 passed through the sieve to obtain the sample a21, and then cut the sample a21 twice in the vertical direction to obtain three samples b1, b2, and b3 on the left, right, and middle; S6. Perform primary grinding, third mixing of glue and curing on the samples b1, b2, and b3 respectively to obtain the samples b11, b21, and b31 respectively; S7. Perform grinding, polishing and carbon spraying on the samples b11, b21, and b31 respectively to obtain the samples b12, b22, and b32 respectively; S8. Perform automatic mineralogical analysis on the samples b12, b22, and b32; among them, the analysis surfaces of the samples b12 and b22 are a complete plane, and the analysis surface of the sample b32 is multiple rectangular surfaces, and the test direction of the multiple rectangular surfaces is from top to bottom; measure the contents of minerals in the samples b12, b22, and b32 as H12i, H22i, and Hmi respectively; where m = 1, 2,..., N, N is the serial number of the rectangle for testing, and i = 1, 2,..., n, and n is the total number of types of minerals measured; S9. Calculate the content M2i of minerals, then M2i = K * (H12i + H22i + ) / (N + 2), where K is a correction coefficient, and K = 0.5 * (H12i / H1i + H22i / HNi); S10. Calculate the content Mi of minerals in the sample to be measured, then Mi = (a1' * M1i + a2' * M2i) / a.

[0007] In the technical solution of the embodiment of the present application, the present application pre-treats and screens the in-situ leaching sample, then prepares samples in layers, and respectively re-treats and prepares the samples obtained from different layers, and respectively tests them through automated mineralogy, and then calculates the content of each component in the in-situ leaching sample. Among them, the upper-layer sample is prepared by oblique cutting to ensure as many tested samples as possible and all mineral types are measured. The lower-layer sample is cut into three parts, and the upper surface, lower surface, and side surface are respectively tested. Testing the upper and lower surfaces can ensure that minerals floating only on the top and sinking only on the bottom can be measured. When testing the side surface, a correction coefficient is introduced 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; according to the characteristics that the mineral composition of the in-situ leaching sample is complex, the sedimentation and layering are obvious during the preparation of the automated mineralogy analysis sample, and it is easy to cause insufficient representativeness of the sample sampling, the present application designs a sample treatment and analysis and testing method to accurately measure the content of each component in the in-situ leaching sample.

[0008] 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 to a particle size less than 5 mm, and the sieve hole diameter of the screening is 1-2 mm.

[0009] In this embodiment, the in-situ leaching field sample with a larger size is divided into smaller samples by crushing, and then screened to further separate particles of different particle sizes for subsequent continuous processing.

[0010] In some embodiments, in step S2, the thermosetting embedding material is thermosetting phenolic epoxy resin, the particle size of the thermosetting embedding material is 1-10 mm, and the mass ratio of the sample a1 on the sieve to the thermosetting embedding material is 1:1.5-1:2.

[0011] In this embodiment, by mixing the sample on the sieve and the thermosetting embedding material in a certain proportion, the particles of the sample on the sieve can be fixed without sedimentation and movement.

[0012] 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 penetrates 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 glue, and ultrasonically vibrating for 10 min.

[0013] In this embodiment, compared with the horizontal cutting surface, the inclined cutting increases the measurement area 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, making the appearance probability of each particle size equal in the horizontal and vertical directions and ensuring the representativeness of the sample.

[0014] 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 test particles is greater than 10,000 grains.

[0015] In this embodiment, through the automatic mineralogical analysis of the sample a111, the mineral analysis test results of the inclined section of the oversize sample are obtained.

[0016] In some embodiments, in step S5, the particle size of the grinding is not greater than 74 μm, and the second mixing with colloid is: adding the colloid to the ground sample and ultrasonically vibrating for more than 20 min.

[0017] In this embodiment, after crushing and screening, the undersize particles are still relatively large. By grinding, a sample with a smaller particle size is obtained, making the particles less likely to settle. Through mixing with colloid and ultrasonic vibration, the particle distribution becomes more uniform.

[0018] 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 pressure of the initial grinding is 3 to 6 N, the rotation speed of the initial grinding is 150 to 250 rmp, the particle size of the abrasive for the initial grinding is not less than 1000 mesh, the initial grinding time for the upper surface and the lower surface is less than 1 min, and the initial grinding time for the side surface is 1 to 3 min; the third mixing with colloid is: turning the upper surface, the lower surface, and the side surface of the samples b1, b2, and b3 downward respectively, adding the colloid, and ultrasonically vibrating for more than 20 min. In step S7, in 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 min; the particle size of the polishing material is not greater than 1 μm, and the polishing time is not greater than 5 min.

[0019] In this embodiment, by initially grinding the upper surface, the lower surface, and the side surface of the vertically cut samples b1, b2, and b3, the particles on the test surface are exposed, and then mixing with colloid, grinding and polishing, and spraying carbon are carried out to prepare automatic mineralogical analysis samples for the three surfaces respectively, which can ensure that only the minerals floating on the top and only the minerals sinking to the bottom can be measured, and the minerals settling in the middle layer can also be measured, making the test samples more representative.

[0020] In some embodiments, in step S8, the complete plane is rectangular or circular; the multiple rectangular surfaces are equally spaced from top to bottom, the long sides of the multiple rectangular surfaces are parallel and equal to the bottom edge of the cutting surface of b3, the rectangle serial number N≥5, and the width of the multiple rectangular surfaces is 10 to 20 times the average particle size of 5 to 10 largest particles in the field of view; in the automatic mineralogical analysis of the samples b12, b22, and b32 in step S8, the magnification of the automatic mineralogical analysis test is 500 to 1000 times, and the number of test particles is 30,000 to 50,000 grains.

[0021] In this embodiment, the side is divided into multiple rectangles parallel to the horizontal direction from top to bottom as test surfaces for automatic mineralogical analysis. The correction coefficient can be calculated through the test results of the uppermost and lowermost layers and the test results of the upper and lower surfaces of samples b1 and b2, so that the content of minerals in the undersize samples can be obtained.

[0022] The above description is only an overview of the technical solution of this application. In order to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the specific embodiments of this application are specifically given below. Brief Description of the Drawings

[0023] In order to illustrate the technical solution of this application more clearly, the drawings used in this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a flowchart of the measurement method for the determination method of the in-situ leaching sample substance composition in Example 1. Detailed Description of the Embodiments

[0025] The embodiments of the technical solution of this application will be described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, so they are only examples and cannot be used to limit the protection scope of this application.

[0026] Referring to "embodiment" in this text means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments of this 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 quantity, specific order or primary-secondary relationship of the indicated technical features.

[0028] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0029] In order to solve the problems of insufficient sample representativeness, single analysis method, and large data deviation in the existing analysis and testing methods for the material composition of in-situ leaching samples during sample preparation, the present application provides a method for determining the material composition of in-situ leaching samples. The traditional measurement method mainly preprocesses samples through the mode of sampling - grinding - quartering, and finally only takes a small amount of the quartered samples to prepare automatic mineralogy analysis samples for analysis. Inevitably, there are problems of insufficient sample representativeness and large data deviation. In the present application, the in-situ leaching samples are preprocessed and screened, then stratified sampling is carried out, and the samples obtained from different layers are reprocessed and sampled respectively. The samples are tested by automatic mineralogy respectively, and then the contents of each component in the in-situ leaching samples are calculated. Among them, the upper-layer samples are sampled by the bevel cutting method to ensure as many tested samples as possible and all measured mineral species. The lower-layer samples are cut into three parts, and the upper surface, lower surface, and side surface are tested respectively. Testing the upper and lower surfaces can ensure that only the minerals floating on the top and sinking to the bottom can be measured. When testing the side surface, a correction coefficient is introduced to measure the content of the minerals in the middle layer at the same time. Finally, the contents of each substance in the in-situ leaching samples are accurately measured; according to the characteristics of complex mineral composition of in-situ leaching samples, obvious sedimentation stratification is easy to lead to insufficient sample sampling representativeness when preparing automatic mineralogy analysis samples, the present application designs a sample processing and analysis and testing method to accurately measure the contents of each component in the in-situ leaching samples.

[0030] The present application provides a method for determining the material composition of in-situ leaching samples, comprising the following steps: S1. Take a g of dry sample to be tested, then break and screen it to obtain a sieve residue sample a1 and a sieve passing sample a2. The mass of the sieve residue sample a1 is a1' g, and the mass of the sieve passing sample a2 is a2' g; S2. Mix the sieve residue sample a1 with a thermosetting embedding material and cure it to obtain a sample a11; S3. Incline and cut the sample a11 to obtain a cut sample, and then carry out the first mixing of glue and curing on the cut sample to obtain a sample a111 after the first mixing of glue; S4. Carry out automatic mineralogy analysis on the sample a111 to measure the content of minerals as M1i; where i = 1, 2,..., n, and n is the total number of types of measured minerals; S5. Grind, carry out the second mixing of glue and cure the sieve passing sample a2 to obtain a sample a21, and then cut the sample a21 twice in the vertical direction to obtain three samples b1, b2, and b3 on the left, right, and middle; S6. Carry out preliminary grinding, the third mixing of glue and cure on the samples b1, b2, and b3 respectively to obtain samples b11, b21, and b31 respectively; S7. Grind and polish and carburize the samples b11, b21, and b31 respectively to obtain samples b12, b22, and b32 respectively; S8. Perform automatic mineralogical analysis on the samples b12, b22, and b32; wherein, the analysis surfaces of the samples b12 and b22 are a complete plane, and the analysis surface of the sample b32 is multiple rectangular surfaces, and the test direction of the multiple rectangular surfaces is from top to bottom; measure the contents of minerals in the samples b12, b22, and b32 as H12i, H22i, and Hmi respectively; wherein, m = 1, 2,..., N, N is the serial number of the rectangle for testing, and i = 1, 2,..., n, n is the total number of types of minerals measured; S9. Calculate the content M2i of the mineral, then M2i = K * (H12i + H22i + ) / (N + 2), where K is a correction factor, and K = 0.5 * (H12i / H1i + H22i / HNi); S10. Calculate the content Mi of the mineral in the sample to be tested, then Mi = (a1' * M1i + a2' * M2i) / a.

[0031] In the technical solution of the embodiment of the present application, by pre - treating and screening the in - situ leaching sample, then preparing samples in layers, and respectively re - treating and preparing the samples obtained from different layers, and performing tests respectively through automatic mineralogy, and then calculating the contents of various components in the in - situ leaching sample. Among them, the upper - layer sample is prepared by oblique cutting to ensure as many test samples as possible and all measured mineral types. The lower - layer sample is cut into three parts, and the upper surface, lower surface, and side surface are respectively tested. Testing the upper and lower surfaces can ensure that minerals floating only on the upper surface and sinking only on the bottom surface can be measured. Testing the side surface introduces a correction factor and measures the content of minerals in the middle layer at the same time, and finally accurately measures the contents of various substances in the in - situ leaching sample; according to the characteristics that the mineral composition of the in - situ leaching sample is complex, the sedimentation and layering are obvious during the preparation of the automatic mineralogical analysis sample, and it is easy to cause insufficient representativeness of sample sampling, the present application designs a sample processing and analysis and testing method to accurately measure the contents of various components in the in - situ leaching sample.

[0032] Further, in some embodiments, in step S1, the sample to be tested is an in - situ leaching on - site sample, the mass a of the sample to be tested is not less than 3000 g, the crushing is to a particle size less than 5 mm, and the screen hole diameter of the screening is 1 - 2 mm.

[0033] In the technical solution of the embodiment of the present application, the in - situ leaching on - site sample with a larger size is divided into smaller samples by crushing, and then screened to further separate particles with different particle sizes for subsequent continuous processing.

[0034] Further, in some embodiments, in step S2, the thermosetting embedding material is thermosetting phenolic epoxy resin, the particle size of the thermosetting embedding material is 1-10 mm, and the mass ratio of the oversize sample a1 to the thermosetting embedding material is 1:1.5-1:2.

[0035] In the technical solution of the embodiment of the present application, by mixing the oversize sample and the thermosetting embedding material in a certain proportion, the oversize sample particles can be fixed and no sedimentation movement occurs.

[0036] Further, in some embodiments, in step S3, the cutting angle of the inclined cutting with respect to the horizontal direction is 30°-60°, and the cutting surface of the inclined cutting penetrates 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 glue, and ultrasonically vibrating for 10 min.

[0037] In the technical solution of the embodiment of the present application, compared with the horizontal cutting surface, the inclined cutting increases the measurement area 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 appearance probability in the horizontal and vertical directions, ensuring the representativeness of the sample.

[0038] Further, in some embodiments, in step S4, in the automatic mineralogical analysis of the sample a111, the magnification of the automatic mineralogical analysis is 10-100 times, and the number of test particles is greater than 10,000.

[0039] In the technical solution of the embodiment of the present application, by performing automatic mineralogical analysis on the sample a111, the mineral analysis test results of the cross-section of the oversize sample are obtained.

[0040] Further, in some embodiments, in step S5, the particle size of the grinding is not greater than 74 um, and the second mixing of glue is: adding the glue to the ground sample and ultrasonically vibrating for more than 20 min.

[0041] In the technical solution of the embodiment of the present application, after crushing and screening, the particles under the sieve are still relatively large. By grinding, a sample with a smaller particle size is obtained, so that the particles are not so easy to sediment. By mixing glue and ultrasonically vibrating, the particle distribution is made more uniform.

[0042] Further, 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 pressure for the initial grinding is 3 - 6 N, the rotation speed for the initial grinding is 150 - 250 rmp, the particle size of the abrasive for the initial grinding is not less than 1000 mesh, the initial grinding time for the upper surface and the lower surface is less than 1 min, and the initial grinding time for the side surface is 1 - 3 min. For the third mixing of the colloid: with the upper surface, the lower surface, and the side surface of the samples b1, b2, and b3 facing down respectively, add the colloid and ultrasonically vibrate for more than 20 min. 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 min; the particle size of the polishing material is not greater than 1 μm, and the polishing time is not greater than 5 min.

[0043] In the technical solution of the embodiment of the present application, by initially grinding the upper surface, the lower surface, and the side surface of the samples b1, b2, and b3 after vertical cutting to expose the particles on the test surface, then performing colloid mixing, grinding and polishing, and carbon spraying, automatic mineralogy analysis samples for three surfaces are prepared respectively, which can ensure that minerals that only float on the top and only sink to the bottom can be measured, and minerals that settle in the middle layer can also be measured, making the test samples more representative.

[0044] Further, in some embodiments, in step S8, the complete plane is rectangular or circular; the multiple rectangular surfaces are equally spaced from top to bottom, the long sides of the multiple rectangular surfaces are parallel and equal to the bottom edge of the cutting surface of b3, the rectangular serial number N≥5, and the width of the multiple rectangular surfaces is 10 - 20 times the average particle size of the 5 - 10 largest particles in the field of view. In step S8, in the automatic mineralogy analysis of the samples b12, b22, and b32, the magnification for the automatic mineralogy analysis test is 500 - 1000 times, and the number of tested particles is 30000 - 50000.

[0045] In the technical solution of the embodiment of the present application, by performing automatic mineralogy analysis on the side surface divided into multiple rectangles parallel to the horizontal direction from top to bottom as the test surface, the correction coefficient can be calculated through the test results of the topmost and bottommost layers and the test results of the upper surface and the lower surface of the samples b1 and b2, so as to obtain the content of minerals in the undersize sample.

[0046] Some specific embodiments are listed below. It should be noted that the embodiments described below are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. For technologies or conditions not specified in the embodiments, they shall be carried out according to the technologies or conditions described in the literature in this field or according to the product specifications. For reagents or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0047] Example 1 This embodiment provides a method for determining the composition of in-situ leaching samples, as follows: Figure 1 The specific steps are as follows: (1) Weigh 5000 g of the natural sun-dried sample to be tested, crush it to obtain particles with a maximum particle size less than or equal to 5 mm, and then sieve it with a sieve with a pore size of 2 mm. Weigh the mass of the sample a1 on the sieve as 3542 g, and the mass of the sample a2 under the sieve as 1458 g.

[0048] (2) Mix the sample a1 with thermosetting phenolic epoxy resin with a particle size of 5 mm at a mass ratio of 1:2, and then load it into an embedding machine for curing to obtain the sample a11.

[0049] (3) Cut the sample a11 at an angle of 45° with the horizontal plane, and the cutting surface penetrates the upper and lower surfaces of the sample a11. Place the cutting surface of the sample a11 downward in a sample preparation mold, add resin glue, and ultrasonically vibrate for 10 min. After curing, obtain the sample a111.

[0050] (4) Conduct automatic mineralogical analysis on the sample a111. The magnification for testing is 25 times, the number of particles tested is 10,000, and the measured mineral content is M1i; where i = 1, 2,..., n, and n is the total number of types of minerals measured. In this embodiment, when i = 1, it is pyrite, and the measured content of pyrite is M11 = 4.46%.

[0051] (5) Grind the sample a2 to a particle size not greater than 74 μm, add resin glue, ultrasonically vibrate for 20 min, and after curing, obtain the sample a21. Cut the sample a21 twice in the vertical direction to obtain three samples b1, b2, and b3 on the left, right, and middle.

[0052] (6) Use abrasive with a particle size of 1000 mesh to grind the upper surface of the sample b1 and the lower surface of the sample b2 for 1 min each, and grind the side surface of the sample b3 for 2 min under a pressure of 3 N and a rotation speed of 150 rmp. Then, place the upper surface, lower surface, and side surface of the samples b1, b2, and b3 downward respectively, add resin glue, ultrasonically vibrate for 20 min, and cure to obtain the samples b11, b21, and b31 respectively.

[0053] (7) Grind the samples b11, b21, and b31 with abrasive with a particle size of 6 μm for 3 min respectively, then polish with abrasive with a particle size of 1 μm for 3 min, and then perform carbon spraying treatment to obtain the samples b12, b22, and b32 respectively.

[0054] (8) Automatically analyze samples b12, b22, and b32 by mineralogy. The magnification for testing is 500 times, and the number of particles tested is 30,000. Among them, the analysis planes selected for b12 and b22 are a complete rectangle. The analysis planes selected for sample b32 are multiple rectangles arranged at equal intervals with a width of 0.08 mm, where the long sides are parallel and equal to the bottom edge of the cutting plane of sample b3, and are arranged from top to bottom. The measured contents of minerals in samples b12, b22, and b32 are H12i, H22i, and Hmi respectively; where m = 1, 2,......, N, N is the serial number of the rectangle for testing, and i = 1, 2,......, n, n is the total number of types of minerals measured. In this embodiment, when i = 1, it is pyrite, N = 5, and the results of the pyrite contents H121, H221, and Hm1 in samples b12, b22, and b32 are shown in Table 1.

[0055] Table 1 Test results of pyrite contents in samples b12, b22, and b32 in Example 1 (9) Calculate the content M2i of the mineral, then M2i = K * (H12i + H22i + ) / (N + 2), where K is a correction factor, and K = 0.5 * (H12i / H1i + H22i / HNi); in this embodiment, when i = 1, it is pyrite. Based on the measured data, the correction factor K = 0.5 * (H121 / H11 + H221 / H51) = 0.5 * (4.35 / 4.48 + 5.22 / 5.10) = 0.9973 can be calculated. Then the pyrite content M21 = K * (H121 + H221 + H11 + H21 + H31 + H41 + H51) / (5 + 2) = 4.76%.

[0056] (10) Calculate the content Mi of the mineral 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 M1 in the sample to be tested = (a1' * M11 + a2' * M21) / a = (4.46% * 3452 + 4.76% * 1458) / 5000 = 4.55%.

[0057] In summary, the present application provides a method for determining the composition of in-situ leaching samples. Traditional measurement methods mainly perform sample pretreatment through the mode of sampling - grinding - quartering, and finally only a small amount of the quartered samples are taken to prepare automatic mineralogical analysis samples for analysis. Inevitably, there are problems of insufficient sample representativeness and large data deviation. In the present application, the in-situ leaching samples are pretreated and screened, then stratified sampling is carried out, and the samples obtained from different layers are respectively reprocessed for sampling. The samples are respectively tested by automatic mineralogy, and then the contents of each component in the in-situ leaching samples are calculated. Among them, the upper-layer samples are sampled in an oblique cutting manner to ensure as many test samples as possible and all measured mineral species. The lower-layer samples are cut into three parts, and the upper surface, lower surface and side surface are respectively tested. Measuring the upper and lower surfaces can ensure that only the minerals floating on the top and sinking to the bottom can be measured. When testing the side surface, a correction coefficient is introduced to measure the content of the minerals in the middle layer at the same time, and finally the contents of each substance in the in-situ leaching samples are accurately measured. According to the characteristics that the mineral composition of the in-situ leaching samples is complex, the sedimentation stratification is obvious during the preparation of automatic mineralogical analysis samples, and it is easy to lead to insufficient sample sampling representativeness, the present application designs a sample processing and analysis test method to accurately measure the contents of each component in the in-situ leaching samples.

[0058] It should be noted that the present application is not limited to the above embodiments. The above embodiments are only examples, and the embodiments with the same structure and the same effect as the technical idea within the technical solution scope of the present application are included in the technical scope of the present application. In addition, within the scope of not departing from the main idea of the present application, various deformations that can be thought of by those skilled in the art are applied to the embodiments, and other ways constructed by combining some constituent elements of the embodiments are also included in the scope of the present application.

Claims

1. A method for determining the material composition of an in-situ leached sample, characterized in that: The following steps are involved: S1. Take the dried sample ag to be tested, and then crush and sieve to obtain an oversize sample a1 and an undersize sample a2, wherein the mass of the oversize sample a1 is a1'g, and the mass of the undersize sample a2 is a2'g; S2. The sample a1 on the sieve 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. Performing automatic mineralogical analysis on the sample a111, and measuring the mineral content as M1i; wherein i=1, 2, ..., n, and n is the total number of mineral types measured; S5. Grinding, second mixing and curing the sample a2 under the sieve to obtain a sample a21, and then cutting the sample a21 twice in the vertical direction to obtain three samples b1, b2 and b3 on the left, right and middle; S6. The samples b1, b2 and b3 are respectively subjected to initial grinding, third mixing and curing to obtain samples b11, b21 and b31, respectively; S7. The samples b11, b21 and b31 are respectively subjected to grinding and polishing and carbon spraying to obtain samples b12, b22 and b32, respectively; S8. Performing automatic mineralogical analysis on the samples b12, b22 and b32; wherein the analysis surface of the samples b12 and b22 is a complete plane, and the analysis surface of the sample b32 is a plurality of rectangular surfaces, and the test direction of the plurality of rectangular surfaces is from top to bottom; the contents of the minerals in the samples b12, b22 and b32 are measured to be H12i, H22i and Hmi, respectively; wherein m=1, 2, ..., N, N is the serial number of the rectangle to be tested, i=1, 2, ..., n, n is the total number of the types of the measured minerals; 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 content Mi of the mineral in the sample to be tested, then 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 3000g, the crushing is a crushing particle size less than 5mm, and the sieve hole diameter of the screening is 1-2mm.

3. The method for determining the material composition of an in-situ leaching sample according to claim 1, characterized in that: In step S2, the thermosetting embedding material is a thermosetting phenolic epoxy resin, the particle size of the thermosetting embedding material is 1-10 mm, and the mass ratio of the sieve sample a1 to the thermosetting embedding 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, characterized in that: 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 facing 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, characterized in that: 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, characterized in that: In step S5, the particle size of the ground ore is not greater than 74 μm, and the second colloid mixing is: 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, characterized in that: 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 surface and the lower surface is less than 1 min, and the initial grinding time of the side surface is 1~3min; the third mixing of the glue is: the upper surface, the lower surface and the side surface of the samples b1, b2 and b3 are facing downward, the colloid is added, and the ultrasonic vibration is more than 20min.

8. The method for determining the material composition of an in-situ leached sample according to claim 1, characterized in that: 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 min; the particle size of the polishing material is not greater than 1 μm, and the polishing time is not greater than 5 min.

9. The method for determining the material composition of an in-situ leached sample according to claim 1, characterized in that: In step S8, the complete plane is a rectangle or a circle; 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 30000~50000.

10. The method for determining the material composition of an in-situ leached sample according to claim 1, characterized in that: 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 30000-50000 particles.

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