Method for measuring metal distribution rate of gold mineral

Abstract

The invention provides a method for measuring the metal distribution rate of gold minerals, and belongs to the field of process mineralogy. According to the method for measuring the metal distribution rate of the gold minerals, reselection, magnetic separation, flotation and nitric acid treatment are sequentially conducted firstly, the gold minerals are accurately separated out, and preparation is made for subsequent measurement of the content and color of the gold minerals; then comprehensively considering the content and the color of the gold minerals and the overall gold grade of the gold ores, so that the metal distribution condition of the gold minerals in the ores can be more comprehensively evaluated; then, the actual content and the metal amount of the gold minerals are calculated, the gold grade of the gold minerals is combined, and finally the gold mineral metal distribution rate with high accuracy is obtained; besides, according to the method, by means of automatic mineralogical analysis and electronic probe testing, the analysis speed and efficiency are improved, and the time and errors of manual analysis are reduced; the result of the gold mineral metal distribution rate measured by the method can provide an important decision basis for mine enterprises, so that the enterprises can utilize resources more effectively, and the economic benefit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of process mineralogy, and in particular to a method for determining the metal distribution rate of a gold ore. Background Art

[0002] In the process of geology, mining and metallurgy research and production, metal distribution rate is an important parameter, especially in the exploration, mining and processing of gold mines, the research results of metal distribution rate play a vital role in the selection of technology and process. The metal distribution rate not only affects the evaluation and mining strategy of mineral resources, but also directly relates to the effective utilization and economic benefits of mineral resources. However, there are some problems in the research on the metal distribution rate of gold minerals, which limits its accuracy and reliability in practical applications.

[0003] First, due to the complexity of gold resources, it is difficult to obtain some data. Because gold resources are widely distributed and relatively scattered, coupled with a complex geological environment, it is difficult to accurately obtain data on their metal distribution rate, especially under deep ore bodies and complex geological structural conditions. The mineralization process of gold mines is complex, and metal distribution is more affected by a variety of geological factors, including magmatic activity, tectonic movement, fluid action, etc. These factors lead to great uncertainty in metal distribution. Secondly, the existing analysis methods have certain limitations. Traditional analysis methods often rely on geological surveys and sample analysis, which are greatly influenced by human subjective factors, have a small sampling volume, and are also accidental in the manual selection of gold minerals. These methods are not only time-consuming and labor-intensive, but also easily affected by human factors and sampling errors, resulting in data errors.

[0004] In view of this, it is necessary to design a method for determining the metal distribution rate of gold minerals to solve the above problems. Summary of the invention

[0005] In view of the technical problems existing in the background technology, the present application provides a method for determining the metal distribution rate of gold minerals, aiming to solve the technical problem of inaccurate methods for determining the metal distribution rate of gold minerals in the prior art.

[0006] The present application embodiment provides a method for determining the metal distribution rate of a gold ore, which specifically comprises the following steps:

[0007] S1, taking a sample to be tested, and dividing the sample to be tested into a sample 1 and a sample 2 to be tested; performing a first gravity separation on the sample 1 to be tested, to obtain a gravity separation concentrate J1 and a gravity separation tailing W1, wherein the first gravity separation yield is n1; and then performing magnetic separation on the gravity separation concentrate J1 to obtain a magnetic separation tailing W2;

[0008] S2, performing open-circuit flotation of gold minerals on the gravity separation tailings W1 to obtain a flotation coarse concentrate J2;

[0009] S3, after mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, sequentially subjecting them to nitric acid treatment and a second gravity separation treatment to obtain a gravity separation concentrate J3;

[0010] S4, analyzing the gravity separation concentrate J3 to obtain target parameters of the gold mineral;

[0011] S5, measuring the color of gold minerals in the re-selected concentrate J3 i ;

[0012] S6. Calculate the gold grade M of the gold ore;

[0013] S7. Calculate the actual content of gold minerals A first i ;

[0014] Then calculate the metal content Y of the gold ore i : Y i =A i ×b i ;

[0015] Finally, calculate the gold mineral metal distribution rate Z i :Z i =Y i / M.

[0016] In the technical solution of the embodiment of the present application, the gold minerals are separated more accurately by first performing physical separation (gravity separation, magnetic separation, flotation) and chemical treatment (nitric acid treatment) in steps, so as to prepare for the subsequent measurement of the content and color of the gold minerals; then the content, color and overall gold grade of the gold minerals are comprehensively considered, so that the metal distribution of the gold minerals in the ore can be more comprehensively evaluated; then, by calculating the actual content and metal amount of the gold minerals, and combining the gold grade of the gold ore, the metal distribution rate of the gold minerals with high accuracy is finally obtained, which is of great significance for the optimization of mining and beneficiation processes. The results of the metal distribution rate of gold minerals measured in this accurate way can provide important decision-making basis for mining enterprises, so that enterprises can also use resources more effectively, reduce unnecessary waste, and improve economic benefits.

[0017] In some embodiments, in step S4, the target parameters of the gold mineral include the content of the gold mineral a i and / or,

[0018] In step S7, the actual content of gold mineral A i The calculation formula is: i =X×a i ;

[0019] Among them, X is the correction factor.

[0020] In this embodiment, the metal distribution data is processed by introducing a correction coefficient to make the data more accurate.

[0021] In some embodiments, the gold minerals include native gold, silver-gold ore, gold-silver ore, and native silver;

[0022] Wherein, i=1, 2, 3, 4 refer to natural gold, silver-gold mine, gold-silver mine, and natural silver respectively; the ranges of gold content in natural gold, silver-gold mine, gold-silver mine, and natural silver are ≥80%, ≥50% and <80%, ≥20% and <50%, and <20% respectively;

[0023] Among them, note a i / a1=x i ;

[0024] Then, A i =X×a1×x i .

[0025] In some embodiments, in step S6, the specific method for calculating the gold grade M of the gold ore is:

[0026] The sample 2 to be tested is re-selected to obtain a re-selected concentrate J4 and a re-selected tailing W3; wherein the re-selection yield is n2;

[0027] Fully analyzing the gold grade p of the gravity separation concentrate J4, and sampling and analyzing the gold grade q of the gravity separation tailings W3;

[0028] The calculation formula for the gold grade M of gold ore is: M = n2×p+(1-n2)×q.

[0029] In some embodiments, the correction coefficient X is calculated as follows: X=M / a1 / (x1×b1+x2×b2+x3×b3+x4×b4).

[0030] In some embodiments, in step S2, the step of performing open circuit flotation includes: performing a roughing operation;

[0031] The reagents used for open circuit flotation include: butyl xanthate 80-120g / t, butyl ammonium black powder 40-60g / t, 2 # Oil 15-25g / t, copper sulfate 180-220g / t.

[0032] In some embodiments, in step S3, the step of performing the nitric acid treatment includes: mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, adding analytical pure concentrated nitric acid to fully react, and then bathing in water for 2 hours, and then filtering and washing in sequence.

[0033] In some embodiments, in step S3, the second gravity separation process includes removing floating gangue minerals.

[0034] In some embodiments, the first reselection yield n1 ranges from 0.001% to 0.005%; the particle size of the sample to be tested is -0.074 mm, accounting for 65% to 85%; and / or,

[0035] The gravity separation yield n2 ranges from 0.10 to 0.20%.

[0036] In some embodiments, in step S4, the method used to analyze the gravity separation concentrate J3 includes automatic mineralogical analysis; and / or,

[0037] In step S5, the color of the gold mineral in the gravity separation concentrate J3 is measured. i The methods used included electron probe testing.

[0038] In this embodiment, by adopting automatic mineralogical analysis, the analysis speed and efficiency are improved, and the time and error of manual analysis are reduced; by adopting electronic probe testing, human subjective factors are avoided, and the analysis speed and accuracy are improved.

[0039] 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

[0040] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 This is a flow chart of the method for determining the metal distribution rate of gold minerals in Example 1 of the present application. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. 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 cannot be used to limit the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present application, the technical terms "first", "second", etc. 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. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0047] The existing methods for determining the metal distribution rate of gold minerals have problems such as low efficiency and low measurement accuracy. Therefore, it is particularly important to provide a method for determining the metal distribution rate of gold minerals that can improve the measurement accuracy of the metal distribution rate of gold minerals and improve the measurement efficiency.

[0048] In order to solve the above-mentioned technical problems, the present application provides a method for determining the metal distribution rate of gold minerals, wherein gravity separation, flotation and nitric acid treatment are first carried out in steps; then the content, color and overall gold grade of the gold mineral are comprehensively considered; then the actual content and metal amount of the gold mineral are calculated, and combined with the gold grade of the gold ore, the measured metal distribution rate of the gold mineral can finally be guaranteed to be high in accuracy; in addition, the method improves the analysis speed and efficiency with the help of automatic mineralogical analysis, and reduces the time and errors of manual analysis.

[0049] The present application embodiment provides a method for determining the metal distribution rate of a gold ore, which specifically comprises the following steps:

[0050] S1, taking a sample to be tested, and dividing the sample to be tested into a sample 1 and a sample 2 to be tested; performing a first gravity separation on the sample 1 to be tested, to obtain a gravity separation concentrate J1 and a gravity separation tailing W1, wherein the first gravity separation yield is n1; and then performing magnetic separation on the gravity separation concentrate J1 to obtain a magnetic separation tailing W2;

[0051] The particle size of the sample to be tested is -0.074 mm, accounting for 65-85%;

[0052] The first reselection yield n1 ranges from 0.001 to 0.005%;

[0053] The magnetic field strength for magnetic separation is 1.00 to 1.50 Tesla;

[0054] S2, performing open-circuit flotation of gold minerals on the gravity separation tailings W1 to obtain a flotation coarse concentrate J2;

[0055] The method of performing open circuit flotation is to perform a roughing separation; or the method of performing open circuit flotation is to perform a roughing separation and a cleaning separation;

[0056] The reagents used for open circuit flotation include: butyl xanthate 80-120g / t, butyl ammonium black powder 40-60g / t, 2 # Oil 15-25g / t, copper sulfate 180-220g / t;

[0057] S3, after mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, sequentially subjecting them to nitric acid treatment and second gravity separation (manual gravity separation) treatment to obtain gravity separation concentrate J3;

[0058] The step of performing the nitric acid treatment comprises: mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, adding analytical pure concentrated nitric acid to fully react, and then bathing in water for 2 hours, and then filtering and washing in sequence;

[0059] The second gravity separation treatment includes removing floating gangue minerals;

[0060] S4, analyzing the gravity separation concentrate J3 to obtain target parameters of the gold mineral;

[0061] The target parameters of the gold mineral include the content of the gold mineral a i ;

[0062] The gold minerals include native gold, silver-gold ore, gold-silver ore, and native silver;

[0063] Wherein, i=1, 2, 3, 4 refer to natural gold, silver-gold mine, gold-silver mine, and natural silver respectively; the ranges of gold content in natural gold, silver-gold mine, gold-silver mine, and natural silver are ≥80%, ≥50% and <80%, ≥20% and <50%, and <20% respectively;

[0064] Among them, note a i / a1=x i ; That is, a1 / a1=x1, a2 / a1=x2, a3 / a1=x3, a4 / a1=x4;

[0065] The process of mounting the gravity-separated concentrate J3 is as follows: rolling the gravity-separated concentrate J3, selecting the mounting material with a particle size of less than 0.074 mm; mixing the mounting material with the gravity-separated concentrate J3 at a mass ratio of 0.8:1.0 to 1.5:1.0, and performing ultrasonic vibration for 30 minutes, and then hot mounting the sample; after the mounted sample is solidified, grinding and polishing and carbon spraying are performed in sequence;

[0066] S5, measuring the color of gold minerals in the re-selected concentrate J3 i ;

[0067] S6. Calculate the gold grade M of the gold ore. The specific method is:

[0068] The sample 2 to be tested is re-selected to obtain a re-selected concentrate J4 and a re-selected tailing W3; wherein the re-selection yield is n2;

[0069] The range of gravity separation yield n2 is 0.10~0.20%;

[0070] Fully analyzing the gold grade p of the gravity separation concentrate J4, and sampling and analyzing the gold grade q of the gravity separation tailings W3;

[0071] The gold grade was analyzed by atomic absorption analysis after enrichment;

[0072] The calculation formula for the gold grade M of gold ore is: M = n2×p+(1-n2)×q;

[0073] S7. Calculate the actual content of gold minerals A first i : A i =X×a i =X×a1×x i ;

[0074] Where, X – correction factor;

[0075] Therefore, X = M / a1 / (x1×b1+x2×b2+x3×b3+x4×b4);

[0076] (X formula source——because ∑A i ×b i =M, that is, ∑X×a i ×b i =M, so X = M / a1 / (x1×b1+x2×b2+x3×b3+x4×b4))

[0077] Then calculate the metal content Y of the gold ore i : Y i =A i ×b i ;

[0078] Finally, calculate the gold mineral metal distribution rate Z i :Z i =Y i / M.

[0079] This method for determining the metal distribution rate of gold minerals, through the first step of gravity separation, magnetic separation, flotation and nitric acid treatment, more accurately separates the gold minerals, in preparation for the subsequent measurement of the gold mineral content and color; then comprehensively considers the gold mineral content, color and the overall gold grade of the gold ore, so that the metal distribution of the gold minerals in the ore can be more comprehensively evaluated; then by calculating the actual content and metal amount of the gold minerals, combined with the gold grade of the gold ore, the metal distribution rate of the gold minerals with high accuracy is finally obtained, which is of great significance for the optimization of mining and beneficiation processes. The results of the gold mineral metal distribution rate measured in this accurate way can provide important decision-making basis for mining enterprises, so that enterprises can also use resources more effectively, reduce unnecessary waste, and improve economic benefits.

[0080] Furthermore, in some embodiments, in step S4, the method used for analyzing the gravity separation concentrate J3 includes automatic mineralogical analysis.

[0081] Furthermore, in some embodiments, in step S5, the color of the gold mineral in the gravity separation concentrate J3 is measured. i The method used includes electron probe testing; among them, no less than 5 analysis points are used for each gold mineral.

[0082] This method greatly improves the analysis speed and efficiency through automatic mineralogical analysis and electron probe testing, and reduces the time and errors of manual analysis.

[0083] 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 limiting the present application. If specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in this area or the product specifications are used. The reagents or instruments used without specifying the manufacturer are all conventional products that can be obtained commercially.

[0084] Example 1

[0085] like Figure 1 As shown, Example 1 provides a method for determining the metal distribution rate of gold ore, which specifically includes the following steps:

[0086] S1, taking a sample to be tested (gold mineral from a gold deposit), and dividing the sample to be tested into sample 1 (10 kg) and sample 2 (5 kg); performing a first gravity separation on the sample 1 to be tested, to obtain gravity separation concentrate J1 and gravity separation tailings W1, wherein the first gravity separation yield n1 is 0.002%; then performing magnetic separation on the gravity separation concentrate J1, to obtain magnetic separation tailings W2;

[0087] The particle size of the samples to be tested is -0.074 mm, accounting for 81%;

[0088] The magnetic field strength for magnetic separation is 1.1 Tesla;

[0089] S2, performing open-circuit flotation of gold minerals (i.e., conventional gold mineral flotation) on the gravity separation tailings W1 to obtain a flotation rough concentrate J2;

[0090] The method of conducting open circuit flotation is: conducting a roughing operation;

[0091] The reagents and dosages used for open circuit flotation are: 90g / t butyl xanthate, 45g / t butyl ammonium black powder, 18g / t 2 # oil, 190 g / t copper sulfate;

[0092] S3, after mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, sequentially subjecting them to nitric acid treatment and a second gravity separation treatment to obtain a gravity separation concentrate J3;

[0093] The step of performing the nitric acid treatment comprises: mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, adding analytical pure concentrated nitric acid to fully react, and then bathing in water for 2 hours, and then filtering and washing in sequence;

[0094] The second gravity separation treatment includes removing floating gangue minerals;

[0095] S4, after mounting the gravity separation concentrate J3, perform automatic mineralogical analysis (deduct the background value during the automatic mineralogical analysis, and set the grayscale to be above 200), and obtain the target parameters of the gold mineral: the content of natural gold a1=15.00%, the content of silver-gold ore a2=2.40%, then a2 / a1=x2=0.16;

[0096] The process of mounting the gravity concentrate J3 is as follows: rolling the gravity concentrate J3 to prepare a fine mounting material with a particle size of less than 0.074 mm and a coarse mounting material; then mixing the fine mounting material with the gravity concentrate J3 at a mass ratio of 0.8:1.0, and ultrasonically vibrating for 30 minutes, spreading the mixed sample in an S-shaped reciprocating-plane manner, and then adding the coarse mounting material until it is full; then hot mounting is performed; after the mounting sample is solidified, grinding and polishing (first use abrasives of 1000 mesh or above for grinding until the surface of the sample is smooth; use abrasives with a particle size of 0.5um or less for polishing, and the grinding and polishing time is within 5 minutes) and carbon spraying are performed in sequence;

[0097] S5, using electronic probe test to measure the color of gold minerals in the gravity separation concentrate J3 i ; Among them, each gold mineral has no less than 5 analysis points, and the specific results are shown in Table 1;

[0098] S6. Calculate the gold grade M of the gold ore. The specific method is:

[0099] The sample 2 to be tested is re-selected to obtain a re-selected concentrate J4 and a re-selected tailing W3; wherein the re-selection yield n2=0.115%;

[0100] The gold grade of the gravity separation concentrate J4 is p=248.92×10 -6 The gold grade of the gravity separation tailing W3 was q=0.48×10 -6 ;

[0101] Gold grade of gold ore M = n2 × p + (1-n2) × q = 0.115% × 248.92 × 10 -6 +(1-0.115%)×0.48×10 -6 =0.7657×10 -6 ;

[0102] S7. Calculate the actual content of gold minerals A i The calculation formula is: i =X×a i =X×a1×x i

[0103] Where, X – correction factor;

[0104] Therefore, X = M / a1 / (x1×b1+x2×b2+x3×b3+x4×b4) = 0.7657×10 -6 / 15.00% / (1×899.6‰+0.16×758.3‰)=5×10 -6 ;

[0105] Then A1=X×x1×a1=5×10-6 ×1×15.00%=0.000075%,

[0106] A2=X×x2×a1=5×10 -6 × 0.16 × 15.00% = 0.000012%;

[0107] Then calculate the metal content of the gold ore as follows:

[0108] Y1=A1×b1=0.000075%×899.6‰=0.6747×10 -6 ;

[0109] Y2=A2×b2=0.000012%×758.3‰=0.0910×10 -6 ;

[0110] Finally, the metal distribution rate of gold minerals is calculated as follows:

[0111] Z1=Y1 / M×100.00%=0.6747×10 -6 / 0.7657×10 -6 =88.12%,

[0112] Z2=Y2 / M×100.00%=0.0910×10 -6 / 0.7657×10 -6 =11.88%, see Table 2 for detailed results.

[0113] Table 1 Gold mineral color analysis results

[0114]

[0115]

[0116] Table 2 Calculation results of gold mineral content and gold metal distribution characteristics

[0117]

[0118] Example 2

[0119] Example 2 provides a method for determining the metal distribution rate of a gold ore, which specifically includes the following steps: S1, taking a sample to be tested (gold ore from a polymetallic deposit), and dividing the sample to be tested into a sample 1 (10 kg) and a sample 2 (5 kg); performing a first gravity separation on the sample 1 to obtain a gravity separation concentrate J1 and a gravity separation tailing W1, wherein the first gravity separation yield n1 is 0.001%; ​​and then performing magnetic separation on the gravity separation concentrate J1 to obtain a magnetic separation tailing W2;

[0120] The particle size of the samples to be tested is -0.074 mm, accounting for 65%;

[0121] The magnetic field strength for magnetic separation is 1.5 Tesla;

[0122] S2, performing open-circuit flotation of gold minerals on the gravity separation tailings W1 to obtain a flotation coarse concentrate J2;

[0123] The steps of conducting open circuit flotation are: conducting a roughing operation;

[0124] The reagents and dosages used for open circuit flotation are: 100g / t butyl xanthate, 50g / t butyl ammonium black powder, 20g / t 2 # Oil, 200g / t copper sulfate;

[0125] S3, after mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, sequentially subjecting them to nitric acid treatment and a second gravity separation treatment to obtain a gravity separation concentrate J3;

[0126] The step of performing the nitric acid treatment comprises: mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, adding analytical pure concentrated nitric acid to fully react, and then bathing in water for 2 hours, and then filtering and washing in sequence;

[0127] The second gravity separation treatment includes removing floating gangue minerals;

[0128] S4, after mounting the gravity separation concentrate J3, perform automatic mineralogical analysis (deduct the background value during the automatic mineralogical analysis, and set the grayscale to be above 200), and obtain the target parameters of the gold mineral: the content of native gold a1=33.63%, the content of silver-gold ore a2=0.42%, a3=0.24%, then a2 / a1=x2=0.012488849, a3 / a1=x3=0.00713649;

[0129] The process of mounting the gravity concentrate J3 is as follows: rolling the gravity concentrate J3 to prepare a fine mounting material with a particle size of less than 0.074 mm and a coarse mounting material; then mixing the fine mounting material with the gravity concentrate J3 at a mass ratio of 0.8:1.0, and ultrasonically vibrating for 30 minutes, spreading the mixed sample in an S-shaped reciprocating-plane manner, and then adding the coarse mounting material until it is full; then hot mounting is performed; after the mounting sample is solidified, grinding and polishing (first use abrasives of 1000 mesh or above for grinding until the surface of the sample is smooth; use abrasives with a particle size of 0.5um or less for polishing, and the grinding and polishing time is within 5 minutes) and carbon spraying are performed in sequence;

[0130] S5, using electronic probe test to measure the color of gold minerals in the gravity separation concentrate J3 i; Among them, each gold mineral has no less than 5 analysis points, and the specific results are shown in Table 3;

[0131] S6. Calculate the gold grade M of the gold ore. The specific method is:

[0132] The sample 2 to be tested is re-selected to obtain a re-selected concentrate J4 and a re-selected tailing W3; wherein the re-selection yield n2=0.11%;

[0133] The gold grade of the gravity separation concentrate J4 is p=1169.58×10 -6 The gold grade of the gravity separation tailing W3 was q=5.94×10 -6 ;

[0134] Gold grade of gold ore M = n2 × p + (1-n2) × q = 0.11% × 1169.58 × 10 -6 +(1-0.11%)×5.94×10 -6 =7.22×10 -6 ;

[0135] S7. Calculate the actual content of gold minerals A i : A i =X×a i =X×a1×x i ;

[0136] Where, X – correction factor;

[0137] Therefore, X = M / a1 / (x1×b1+x2×b2+x3×b3+x4×b4) = 7.22×10 -6 / 33.63% / (1×847.4‰+0.012488849×748.1‰+0.00713649×467.1‰)=0.24962×10 -6 ;

[0138] Then calculate the metal content Y of the gold ore i :

[0139] Finally, calculate the gold mineral metal distribution rate Z i ;

[0140] Actual content of gold minerals A i , metal quantity Y i , gold distribution rate Z i The specific results are shown in Table 4.

[0141] Table 3 Gold mineral color analysis results

[0142]

[0143]

[0144] Table 4 Calculation results of gold mineral content and gold metal distribution characteristics

[0145]

[0146] In summary, the method for determining the metal distribution rate of gold minerals provided by the present invention is to more accurately separate gold minerals by first performing physical separation (gravity separation, magnetic separation, flotation) and chemical treatment (nitric acid treatment) in steps, so as to prepare for the subsequent measurement of the content and color of gold minerals; then the content, color and overall gold grade of gold minerals are comprehensively considered, so that the metal distribution of gold minerals in the ore can be more comprehensively evaluated; then, by calculating the actual content and metal amount of gold minerals, and combining the gold grade of gold ore, the metal distribution rate of gold minerals with high accuracy is finally obtained, which is of great significance for the optimization of mining and beneficiation processes. In addition, the method improves the analysis speed and efficiency by means of automatic mineralogical analysis and electronic probe testing, and reduces the time and error of manual analysis; the results of the metal distribution rate of gold minerals measured in this accurate way can provide important decision-making basis for mining enterprises, so that enterprises can also use resources more effectively, reduce unnecessary waste, and improve economic benefits.

[0147] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining 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 metal distribution rate of gold ore, characterized in that: The specific steps include: S1, taking a sample to be tested, and dividing the sample to be tested into a sample 1 and a sample 2 to be tested; performing a first gravity separation on the sample 1 to be tested, to obtain a gravity separation concentrate J1 and a gravity separation tailing W1, wherein the first gravity separation yield is n1; and then performing magnetic separation on the gravity separation concentrate J1 to obtain a magnetic separation tailing W2; S2, performing open-circuit flotation of gold minerals on the gravity separation tailings W1 to obtain a flotation coarse concentrate J2; S3, after mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, sequentially subjecting them to nitric acid treatment and a second gravity separation treatment to obtain a gravity separation concentrate J3; S4, analyzing the gravity separation concentrate J3 to obtain target parameters of the gold mineral; S5, measuring the color of gold minerals in the gravity separation concentrate J3 i ; S6. Calculate the gold grade M of the gold ore; S7. Calculate the actual content of gold minerals A first i ; Then calculate the metal content Y of the gold ore i : Y i =A i ×b i ; Finally, calculate the gold mineral metal distribution rate Z i :Z i =Y i / M.

2. The method for determining the metal distribution rate of gold ore according to claim 1, characterized in that: In step S4, the target parameters of the gold mineral include the content of the gold mineral a i and / or, In step S7, the actual content of gold mineral A i The calculation formula is: i =X×a i ; Among them, X is the correction factor.

3. The method for determining the metal distribution rate of gold ore according to claim 2, characterized in that: The gold minerals include native gold, silver-gold ore, gold-silver ore, and native silver; Wherein, i=1, 2, 3, 4 refer to natural gold, silver-gold mine, gold-silver mine, and natural silver respectively; the ranges of gold content in natural gold, silver-gold mine, gold-silver mine, and natural silver are ≥80%, ≥50% and <80%, ≥20% and <50%, and <20% respectively; Among them, note a i / a1=x i ; Then, A i =X×a1×x i .

4. The method for determining the metal distribution rate of gold ore according to claim 3, characterized in that: In step S6, the specific method for calculating the gold grade M of the gold ore is: The sample 2 to be tested is re-selected to obtain a re-selected concentrate J4 and a re-selected tailing W3; wherein the re-selection yield is n2; Fully analyzing the gold grade p of the gravity separation concentrate J4, and sampling and analyzing the gold grade q of the gravity separation tailings W3; The calculation formula for the gold grade M of gold ore is: M = n2×p+(1-n2)×q.

5. The method for determining the metal distribution rate of gold ore according to claim 4, characterized in that: The calculation formula of the correction coefficient X is: X=M / a1 / (x1×b1+x2×b2+x3×b3+x4×b4).

6. The method for determining the metal distribution rate of gold ore according to claim 1, characterized in that: In step S2, the steps of performing open circuit flotation include: performing a roughing operation; The reagents used for open circuit flotation include: butyl xanthate 80-120g / t, butyl ammonium black powder 40-60g / t, 2 # Oil 15-25g / t, copper sulfate 180-220g / t.

7. The method for determining the metal distribution rate of gold ore according to claim 1, characterized in that: In step S3, the step of performing the nitric acid treatment includes: mixing the magnetic separation tailings W2 and the flotation rough concentrate J2, adding analytical pure concentrated nitric acid to fully react, and then bathing in water for 2 hours, and then filtering and washing in sequence.

8. The method for determining the metal distribution rate of gold ore according to claim 1, characterized in that: In step S3, the second gravity separation process includes removing floating gangue minerals.

9. The method for determining the metal distribution rate of gold ore according to claim 4, characterized in that: The first reselection yield n1 is in the range of 0.001-0.005%; the particle size of the sample to be tested is -0.074 mm, accounting for 65-85%; and / or, The gravity separation yield n2 ranges from 0.10 to 0.20%.

10. The method for determining the metal distribution rate of gold ore according to claim 1, characterized in that: In step S4, the method used for analyzing the gravity separation concentrate J3 includes automatic mineralogical analysis; and / or, In step S5, the color of the gold mineral in the gravity separation concentrate J3 is measured. i The methods used included electron probe testing.

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