Analytical methods for high sulfur samples

Abstract

The present application provides an analysis method for high-sulfur samples, which belongs to the technical field of process mineralogy. The present application pre-treats and screens the high-sulfur samples, and then prepares samples by stratification, and re-processes and prepares samples for the samples obtained in different layers, and then tests them separately by automatic mineralogy, and then calculates the content of each component in the high-sulfur sample; the present application designs a sample processing and analysis test method based on the characteristics that high-sulfur samples are prone to sedimentation and obvious stratification when preparing samples for automatic mineralogy analysis, and accurately measures the content of each component in the high-sulfur sample. The test method provided by the present invention has a small sampling volume, and the test data volume through automatic mineralogy analysis is large and accurate; it saves workload and provides reliable data support for the efficient use of such resources.

Description

Technical Field

[0001] The present invention relates to the technical field of process mineralogy, and in particular to an analysis method for high-sulfur samples. Background Art

[0002] Research in process mineralogy is moving towards automation and intelligence, gradually eliminating the limitations of manual identification. When using automated mineralogical analysis equipment to test and analyze multiple samples, it is often necessary to measure mixed powder samples. Because the properties of the individual components of the samples being analyzed, such as ores and minerals, vary greatly, the particles of the ground powder samples often vary in size. During the curing process, the particles settle differently in the liquid glue, resulting in uneven distribution, separation, and segregation.

[0003] Existing sample preparation methods often involve mixing a powdered sample with a liquid resin material and stirring the resulting mixture manually or in a container with ultrasonic vibration to achieve uniformity. However, high-sulfur samples (including geological samples and core samples), especially gold and sulfur concentrates, contain high concentrations of metallic sulfides. During sample preparation, these high-density minerals significantly settle, quickly accumulating in the lower and middle portions of the sample preparation tool. This phenomenon is exacerbated by uneven particle size. Automated mineralogical analysis, directly analyzing the exposed surface of such samples, often results in overestimation of high-density minerals such as metallic sulfides. Furthermore, existing sample preparation and testing methods fail to address the issues of false intergrowth and agglomeration of fine particles, which not only affect the degree of dissociation measurement but also lead to false radiographic detections, resulting in biased test data. Summary of the Invention

[0004] In view of the technical problems existing in the background technology, the present application provides an analysis method for high-sulfur samples, aiming to solve the problem that the existing analysis and testing methods for high-sulfur samples are prone to stratification, false growth and agglomeration of small particles during sample preparation, resulting in errors in the test results.

[0005] This application provides a method for analyzing high-sulfur samples, comprising the following steps:

[0006] S1. Take ag of the sample to be tested, then grind, mix and reduce it to a mass of a1 g after reduction;

[0007] S2. Sieving the shrunken sample to obtain an undersize sample and an oversize sample, drying the undersize sample and the oversize sample to obtain sample b1 and sample c1, respectively. The mass of sample b1 is bg, and the mass of sample c1 is cg.

[0008] S3. The sample b1 is sampled, mixed with resin particles, and then a first mixing and curing is performed to obtain a sample b2;

[0009] S4. The sample b2 is cut in a vertical direction to obtain a cut sample, and then the cut sample is subjected to a second mixing and curing to obtain a second mixed sample, and then the vertical section of the second mixed sample is subjected to a first initial grinding to obtain a sample b3;

[0010] S5. uniformly sample the sample c1, the number of samples is n, and then perform a third mixing and curing to obtain samples di, respectively; wherein i = 1, 2, 3, ..., n;

[0011] S6. The sample di is subjected to a second primary grinding, a fourth mixing and curing to obtain a sample ei; the second primary grinding pressure is Ni, the second primary grinding time is Ti, and the second primary grinding speed is Ri; wherein the thickness of the di-1 layer is increased by 1 / n cm;

[0012] S7. The sample b3 and the sample ei were subjected to a second fine grinding, polishing and carbon spraying treatment to obtain samples b4 and gi, respectively;

[0013] S8. Performing automated mineralogical analysis on the samples b4 and gi, and recording the data obtained after analysis as fbm and fim, respectively; wherein m = 1, 2, ..., N, where N is the total number of metal sulfide species measured;

[0014] S9. Calculate the content Hm of a certain mineral in the sample to be tested, where Hm=(b*fbm+c / n*∑fim) / a1.

[0015] In the technical solution of the embodiment of the present application, the present application pre-treats and screens the high-sulfur sample, then prepares the sample in layers, and re-processes and prepares the samples obtained from different layers, tests them separately through automatic mineralogy, and then calculates the content of each component in the high-sulfur sample. The present application designs a sample processing and analysis test method based on the characteristics that high-sulfur samples are prone to sedimentation and obvious stratification when preparing samples for automatic mineralogical analysis. Samples of different properties are processed separately and measured separately, which can accurately measure the content of each component in the high-sulfur sample. The test method provided by the present invention has a small sampling volume, and the test data volume through automatic mineralogical analysis is large and accurate; it saves workload and provides reliable data support for the efficient use of such resources.

[0016] In some embodiments, in step S1, the mass a of the sample to be tested is 1000-3000 g, the first fine grinding is performed so that the grinding particle size is not greater than 0.074 mm, and the mass a1 after the reduction is not less than 100 g.

[0017] In this embodiment, the sample to be tested is ground to a certain fineness by fine grinding, and then reduced to obtain a uniformly mixed powder sample, which is convenient for subsequent processing.

[0018] In some embodiments, in step S2, the screening is wet screening, and the sieve aperture in the wet screening is 10-37 μm; the drying temperature is 60-75° C., and the drying time is greater than 1 hour.

[0019] In this embodiment, particles of different sizes in the sample can be separated by wet sieving.

[0020] In some embodiments, in step S3, the sampling amount of the sample b1 is 2~4 g; the particle size of the resin particles is 5~10 μm, and the volume ratio of the sample b1 to the resin particles is 1:2~1:4; the first mixing is: adding 5~12 ml of colloid to the sample b1, stirring evenly, and then adding glue to the height of sample b2 is 1.0 cm, and then vacuuming is performed. The temperature of the first mixing is 10~20°C.

[0021] In this embodiment, since the sedimentation of the fine-grained sample particles is not obvious, resin particles of a specific particle size are mixed into the fine-grained sample under the sieve, so that the sample under the sieve can be distributed more evenly, thereby obtaining a preliminary automatic mineralogical analysis sample.

[0022] In some embodiments, the second mixing step comprises placing the cut surface of the cut sample downward and adding the colloid until the height of the sample after the second mixing step is 1.0-1.3 cm; the pressure of the first primary grinding is 8-16 N, the time of the first primary grinding is 3-5 min, and the speed of the first primary grinding is 150-250 rpm.

[0023] In this embodiment, the sample b2 is cut in a vertical direction, the cut surface is mixed and initially ground, and the fine particles after uniform dispersion are measured from the side of the sample, so that the data is accurate.

[0024] In some embodiments, the sampling amount of the sample c1 is 5-7 g, and the number of samples n is not less than 3; the third colloid mixing comprises: adding the colloid to the sample c1, and ultrasonically vibrating for 25-35 minutes.

[0025] In this embodiment, since the sample with large particles on the sieve is easy to settle and produce stratification, the sample on the sieve is mixed and ultrasonically dispersed to prepare samples, and no less than 3 samples are prepared to provide a basis for subsequent stratification testing.

[0026] In some embodiments, in step S6, the pressure Ni of the second primary grinding is 8-20N, the time Ti of the second primary grinding is 3-15min, the rotation speed of the second primary grinding is 150-350rmp, and the particle size of the abrasive of the second primary grinding is not less than 200 mesh.

[0027] In this embodiment, the samples di are initially ground, and the thickness of di is increased by 1 / n cm compared to the di-1 layer. By grinding different thicknesses on different samples, samples of different deposition layers can be exposed for layered measurement. Multiple data are averaged to make the test results more representative.

[0028] In some embodiments, the fourth colloid mixing comprises: adding the colloid to the second pre-ground sample until the height of the sample ei is 1.0-1.3 cm, and ultrasonically vibrating for 25-35 minutes.

[0029] In this embodiment, the sample di after primary grinding is mixed to a certain height so that the height of the sample ei after further fine grinding is consistent with the height of the sample to be tested, and bubbles in the colloid are removed by ultrasonic vibration.

[0030] In some embodiments, in step S7, the abrasive particle size of the second fine grinding is not greater than 6 μm, and the time of the second fine grinding is not less than 6 minutes; the polishing particle size of the polishing is not less than 1 μm, and the polishing time is not less than 6 minutes.

[0031] In this embodiment, the sample b3 and the sample ei after mixing with the rubber were subjected to fine grinding, polishing and carbon spraying treatment respectively to obtain automatic mineralogical analysis samples of different levels of the cross section of the above-sieve sample and the below-sieve sample.

[0032] In some embodiments, in step S8, in the automatic mineralogical analysis of the sample b4, the magnification of the automatic mineralogical analysis test is 700~1100 times, and the number of particles tested is 30,000~50,000; in the automatic mineralogical analysis of the sample gi, the magnification of the automatic mineralogical analysis test is 300~800 times, and the number of particles tested is 20,000~40,000.

[0033] In this embodiment, automatic mineralogical analysis is performed on sample b4 and sample gi to obtain analysis and test results of the cross section of the oversize sample and different layers of the undersize sample, which can accurately analyze and test the data results of different minerals in the samples to be tested.

[0034] 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

[0035] 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.

[0036] Figure 1 This is a flow chart of the measurement method for the analysis method of high-sulfur samples in Example 1. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In order to solve the problem that the existing analysis and testing methods of high-sulfur samples are prone to stratification, pseudo-connection and agglomeration of small particles during sample preparation, which leads to errors in the test results, the present application provides an analysis and testing method for high-sulfur samples. The high-sulfur samples are pre-treated and screened, and then sampled in layers, 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 high-sulfur sample is calculated; the present application designs a sample processing and analysis and testing method based on the characteristics that high-sulfur samples are prone to sedimentation and obvious stratification when preparing automatic mineralogical analysis samples, and samples of different properties are processed separately and measured separately, so as to accurately measure the content of each component in the high-sulfur sample. The test method provided by the present invention has a small sampling volume, and the amount of data tested by automatic mineralogical analysis is large and accurate; it saves workload and provides reliable data support for the efficient use of such resources.

[0042] This application provides an analytical testing method for high-sulfur samples, comprising the following steps:

[0043] S1. Take ag of the sample to be tested, then grind, mix and reduce it to a mass of a1 g after reduction;

[0044] S2. Sieving the shrunken sample to obtain an undersize sample and an oversize sample, drying the undersize sample and the oversize sample to obtain sample b1 and sample c1, respectively. The mass of sample b1 is bg, and the mass of sample c1 is cg.

[0045] S3. The sample b1 is sampled, mixed with resin particles, and then a first mixing and curing is performed to obtain a sample b2;

[0046] S4. The sample b2 is cut in a vertical direction to obtain a cut sample, and then the cut sample is subjected to a second mixing and curing to obtain a second mixed sample, and then the vertical section of the second mixed sample is subjected to a first initial grinding to obtain a sample b3;

[0047] S5. uniformly sample the sample c1, the number of samples is n, and then perform a third mixing and curing to obtain samples di, respectively; wherein i = 1, 2, 3, ..., n;

[0048] S6. The sample di is subjected to a second primary grinding, a fourth mixing and curing to obtain a sample ei; the second primary grinding pressure is Ni, the second primary grinding time is Ti, and the second primary grinding speed is Ri; wherein the thickness of the di-1 layer is increased by 1 / n cm;

[0049] S7. The sample b3 and the sample ei were subjected to a second fine grinding, polishing and carbon spraying treatment to obtain samples b4 and gi, respectively;

[0050] S8. Performing automated mineralogical analysis on the samples b4 and gi, and recording the data obtained after analysis as fbm and fim, respectively; wherein m = 1, 2, ..., N, where N is the total number of metal sulfide species measured;

[0051] S9. Calculate the content Hm of a certain mineral in the sample to be tested, where Hm=(b*fbm+c / n*∑fim) / a1.

[0052] In the technical solution of the embodiment of the present application, the high-sulfur sample is pretreated and screened, and then layered and sampled. The samples prepared from different layers are reprocessed and sampled separately, and are tested separately by automatic mineralogy. Then, the content of each component in the high-sulfur sample is calculated. According to the characteristics of high-sulfur samples that are prone to sedimentation and obvious stratification when preparing samples for automatic mineralogical analysis, the present application designs a sample processing and analysis test method. Samples of different properties are processed separately and measured separately, and the content of each component in the high-sulfur sample can be accurately measured. The test method provided by the present invention has a small sampling volume, and the test data volume through automatic mineralogical analysis is large and accurate; it saves workload and provides reliable data support for the efficient use of such resources.

[0053] Furthermore, in some embodiments, in step S1, the mass a of the sample to be tested is 1000-3000 g, the first fine grinding is a grinding particle size not greater than 0.074 mm, and the mass a1 after the reduction is not less than 100 g.

[0054] In the technical solution of the embodiment of the present application, the sample to be tested is ground to a certain fineness by fine grinding, and then reduced to obtain a uniformly mixed powder sample, which is convenient for subsequent processing.

[0055] Furthermore, in some embodiments, in step S2, the screening is wet screening, and the sieve aperture in the wet screening is 10-37 μm; the drying temperature is 60-75° C., and the drying time is greater than 1 hour.

[0056] In the technical solution of the embodiment of the present application, particles of different sizes in a sample can be separated by wet screening.

[0057] Furthermore, in some embodiments, in step S3, the sampling amount of the sample b1 is 2~4 g; the particle size of the resin particles is 5~10 μm, and the volume ratio of the sample b1 to the resin particles is 1:2~1:4; the first glue mixing is: adding 5~12 ml of colloid to the sample b1, stirring evenly, and then adding glue to the height of the sample b2 is 1.0 cm, and then vacuuming, and the temperature of the first glue mixing is 10~20°C; the colloid is a mixture of epoxy resin and curing agent in a volume ratio of 1:0.5~1:3.

[0058] In the technical solution of the embodiment of the present application, since the sedimentation of the fine-grained sample particles is not obvious, resin particles of a specific particle size are mixed into the fine-grained sample under the sieve, so that the distribution of the sample under the sieve can be more uniform, and a preliminary automatic mineralogical analysis sample can be obtained.

[0059] Furthermore, in some embodiments, in step S4, the second mixing comprises: placing the cut surface of the cut sample downward, and then adding the colloid until the height of the sample after the second mixing is 1.0-1.3 cm; the pressure of the first primary grinding is 8-16 N, the time of the first primary grinding is 3-5 min, and the speed of the first primary grinding is 150-250 rpm.

[0060] In the technical solution of the embodiment of the present application, the sample b2 is cut in the vertical direction, and then the cut surface is mixed and initially ground, and the fine particles after uniform dispersion are measured through the side of the sample, so the data is accurate.

[0061] Furthermore, in some embodiments, in step S5, the sampling amount of the sample c1 is 5-7 g, and the number of samples n is not less than 3; the third colloid mixing comprises: adding the colloid to the sample c1, and ultrasonically vibrating for 25-35 minutes.

[0062] In the technical solution of the embodiment of the present application, since the sample with large particles on the sieve is easy to settle and produce stratification, the sample on the sieve is mixed and ultrasonically dispersed to prepare the sample, and no less than 3 samples are prepared to provide a basis for subsequent stratification testing.

[0063] Furthermore, in some embodiments, in step S6, the pressure Ni of the second primary grinding is 8-20N, the time Ti of the second primary grinding is 3-15min, the rotation speed of the second primary grinding is 150-350rmp, and the particle size of the abrasive of the second primary grinding is not less than 200 mesh.

[0064] In the technical solution of the embodiment of the present application, the samples di are initially ground respectively, and the thickness of di is increased by 1 / n cm compared with the di-1 layer. By grinding different thicknesses on different samples, samples of different deposition layers can be exposed, and layered measurements can be performed. Multiple data are averaged to make the test results more representative.

[0065] Furthermore, in some embodiments, in step S6, the fourth colloid mixing comprises: adding the colloid to the second pre-ground sample until the height of the sample ei is 1.0-1.3 cm, and ultrasonically vibrating for 25-35 minutes.

[0066] In the technical solution of the embodiment of the present application, the sample di after initial grinding is mixed to a certain height so that the height of the sample ei after further fine grinding is consistent with the height of the sample to be tested, and bubbles in the colloid are removed by ultrasonic vibration.

[0067] Furthermore, in some embodiments, in step S7, the abrasive particle size of the second fine grinding is not greater than 6 μm, and the time of the second fine grinding is not less than 6 minutes; the polishing particle size of the polishing is not less than 1 μm, and the polishing time is not less than 6 minutes.

[0068] In the technical solution of the embodiment of the present application, sample b3 and sample ei after mixing with glue are respectively finely ground, polished and carbon-sprayed to obtain automatic mineralogical analysis samples at different levels of the above-sieve sample section and the below-sieve sample section.

[0069] Furthermore, in some embodiments, in step S8, in the automatic mineralogical analysis of the sample b4, the magnification of the automatic mineralogical analysis test is 700~1100 times, and the number of particles tested is 30,000~50,000; in the automatic mineralogical analysis of the sample gi, the magnification of the automatic mineralogical analysis test is 300~800 times, and the number of particles tested is 20,000~40,000.

[0070] In the technical solution of the embodiment of the present application, automatic mineralogical analysis is performed on sample b4 and sample gi to obtain analysis and test results of the cross section of the above-sieve sample and different levels of the below-sieve sample, which can accurately analyze and test the data results of different minerals in the sample to be tested.

[0071] 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.

[0072] Example 1

[0073] This embodiment provides a method for analyzing and testing high-sulfur samples, such as Figure 1 As shown, the specific steps include:

[0074] (1) Weigh 2000 g of the sample to be tested, crush and grind it to obtain a powder with a maximum particle size of less than or equal to 0.074 mm, and further mix and reduce it. The mass of the sample after reduction is 1000 g.

[0075] (2) Add water to the shrunken sample and sieve it with a sieve with an aperture of 10 μm. Then, dry the sample b1 under the sieve and the sample c2 on the sieve at 60°C for 1 hour and weigh them. The weight of sample b1 is b = 232 g, and the weight of sample c1 is c = 768 g.

[0076] (3) Weigh 4 g of the sample under the sieve and mix it with resin particles with a particle size of 5 μm. The volume ratio of the sample volume to the resin particles is 1:2. Then, at 15°C, add 8 ml of colloid, which is an epoxy resin and a curing agent with a volume ratio of 1:1. After stirring evenly, add the colloid to a height of 1 cm and evacuate the mixture to obtain sample b2.

[0077] (4) Sample b2 was cut vertically along the center line with the cut surface facing downward. The above-mentioned colloid was added to a height of 1 cm and then solidified. The cut surface after mixing the colloid was then ground at a pressure of 8 N and a rotation speed of 150 rpm for 3 minutes to obtain sample b3.

[0078] (5) Weigh three 5g portions of the sieve sample, add the above colloid to each portion, and then ultrasonically vibrate for 25 min to obtain samples d1, d2, and d3, respectively.

[0079] (6) Samples d1, d2, and d3 were ground with 200-mesh grinding media for 5 min at pressures of 8 N, 10 N, and 12 N, and rotation speeds of 150 rpm, 200 rpm, and 350 rpm, respectively. The above-mentioned colloid was then added to the ground samples d1, d2, and d3 until the sample height reached 1.3 cm, and ultrasonically vibrated for 25 to 35 min to obtain samples e1, e2, and e3, respectively.

[0080] (7) Sample b3 and samples e1, e2, and e3 were ground with 6 μm abrasive for 10 min and then polished with 1 μm polishing material for 10 min to obtain sample b4 and samples g1, g2, and g3, respectively.

[0081] (8) Samples b4, g1, g2, and g3 were subjected to automated mineralogical analysis, with 30,000 grains tested in each case. Sample b4 was tested at a magnification of 800x, while samples g1, g2, and g3 were tested at a magnification of 500x. The data obtained from the analysis were recorded as fbm, f1m, f2m, and f3m, respectively, where m = 1, 2, ..., N, where N is the total number of metal sulfide species detected. In this example, when m = 1, pyrite is detected, and the pyrite contents were fb1 = 16.42%, f11 = 20.33%, f12 = 19.94%, and f13 = 18.56%.

[0082] (9) Calculate the pyrite content Hm in the sample to be tested, then Hm=(b*fbm+c / n*∑fim) / a1=(232*16.42%+768 / 3*(20.33%+19.94%+18.56%)) / 1000=18.87%.

[0083] In summary, the present application provides an analytical testing method for high-sulfur samples. The high-sulfur samples are pre-treated and screened, and then layered for sample preparation, and the samples prepared from different layers are re-processed and sampled respectively, and tested separately by automatic mineralogy, and then the content of each component in the high-sulfur sample is calculated; based on the characteristics of high-sulfur samples that are prone to sedimentation and obvious stratification when preparing automatic mineralogical analysis samples, the present application designs a sample processing and analytical testing method, which processes samples of different properties separately and measures them separately, and can accurately measure the content of each component in the high-sulfur sample. The testing method provided by the present invention has a small sampling volume, and the amount of data tested by automatic mineralogical analysis is large and accurate; it saves workload and provides reliable data support for the efficient use of such resources.

[0084] 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 analyzing high-sulfur samples, characterized in that: The following steps are involved: S1. Take ag of the sample to be tested, then grind, mix and reduce it to a mass of a1 g after reduction; S2. Sieving the shrunken sample to obtain an undersize sample and an oversize sample, drying the undersize sample and the oversize sample to obtain sample b1 and sample c1, respectively. The mass of sample b1 is bg, and the mass of sample c1 is cg. S3. The sample b1 is sampled, mixed with resin particles, and then a first mixing and curing is performed to obtain a sample b2; S4. The sample b2 is cut in a vertical direction to obtain a cut sample, and then the cut sample is subjected to a second mixing and curing to obtain a second mixed sample, and then the vertical section of the second mixed sample is subjected to a first initial grinding to obtain a sample b3; S5. uniformly sample the sample c1, the number of samples is n, and then perform a third mixing and curing to obtain samples di, respectively; wherein i = 1, 2, 3, ..., n; S6. The sample di is subjected to a second primary grinding, a fourth mixing and curing to obtain a sample ei; the second primary grinding pressure is Ni, the second primary grinding time is Ti, and the second primary grinding speed is Ri; wherein the thickness of the di-1 layer is increased by 1 / ncm; S7. The sample b3 and the sample ei were subjected to a second fine grinding, polishing and carbon spraying treatment to obtain samples b4 and gi, respectively; S8. Performing automated mineralogical analysis on the samples b4 and gi, and recording the data obtained after analysis as fbm and fim, respectively; wherein m = 1, 2, ..., N, where N is the total number of metal sulfide species measured; S9. Calculate the content Hm of a certain mineral in the sample to be tested, where Hm=(b*fbm+c / n*∑fim) / a1.

2. The method for analyzing high-sulfur samples according to claim 1, wherein In step S1, the mass a of the sample to be tested is 1000-3000 g, the first fine grinding is performed so that the grinding particle size is not greater than 0.074 mm, and the mass a1 after the reduction is not less than 100 g.

3. The method for analyzing high-sulfur samples according to claim 1, characterized in that: In step S2, the screening is wet screening, and the sieve aperture in the wet screening is 10-37 μm; the drying temperature is 60-75° C., and the drying time is greater than 1 hour.

4. The method for analyzing high-sulfur samples according to claim 1, characterized in that: In step S3, the sampling amount of the sample b1 is 2-4 g; the particle size of the resin particles is 5-10 μm, and the volume ratio of the sample b1 to the resin particles is 1:2-1:4; the first mixing step is: adding 5-12 ml of colloid to the sample b1, stirring evenly, adding glue until the height of the sample b2 reaches 1.0 cm, and then vacuuming. The temperature of the first mixing step is 10-20°C.

5. The method for analyzing high-sulfur samples according to claim 4, characterized in that: The second mixing step is as follows: placing the cut surface of the cut sample facing downward, and then adding the colloid until the height of the sample after the second mixing is 1.0-1.3 cm; the pressure of the first primary grinding is 8-16 N, the time of the first primary grinding is 3-5 minutes, and the speed of the first primary grinding is 150-250 rpm.

6. The method for analyzing high-sulfur samples according to claim 4, characterized in that: The sampling amount of the sample c1 is 5-7 g, and the number of samples n is not less than 3; the third colloid mixing comprises: adding the colloid to the sample c1, and ultrasonically vibrating for 25-35 minutes.

7. The method for analyzing high-sulfur samples according to claim 1, characterized in that: In step S6, the pressure Ni of the second primary grinding is 8-20N, the time Ti of the second primary grinding is 3-15min, the rotation speed of the second primary grinding is 150-350rmp, and the particle size of the abrasive of the second primary grinding is not less than 200 mesh.

8. The method for analyzing high-sulfur samples according to claim 4, characterized in that: The fourth colloid mixing comprises: adding the colloid to the sample after the second primary grinding until the height of the sample ei is 1.0-1.3 cm, and ultrasonically vibrating for 25-35 minutes.

9. The method for analyzing high-sulfur samples according to claim 1, characterized in that: In step S7, the abrasive particle size of the second fine grinding is not greater than 6 μm, and the second fine grinding time is not less than 6 minutes; the polishing material particle size of the polishing is not less than 1 μm, and the polishing time is not less than 6 minutes.

10. The method for analyzing high-sulfur samples according to claim 1, characterized in that: In step S8, in the automatic mineralogical analysis of the sample b4, the magnification of the automatic mineralogical analysis test is 700~1100 times, and the number of particles tested is 30,000~50,000; in the automatic mineralogical analysis of the sample gi, the magnification of the automatic mineralogical analysis test is 300~800 times, and the number of particles tested is 20,000~40,000.

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