Calculation method of theoretical flotation recovery rate of gold ore products

Abstract

The present invention provides a method for calculating the theoretical flotation recovery rate of gold ore products. The method involves sampling a sample to be tested, preparing it into an MLA sample, then testing the content of major metal sulfides in the MLA sample, and statistically analyzing the intercalation relationship of the major metal sulfides and the characteristics of gangue minerals in the MLA sample; analyzing the gold content of the major metal sulfides in the sample to be tested; reselecting the sample to be tested, and measuring the gold grade of the sample to be tested; and finally calculating the theoretical recovery rate of recoverable gold in the sample to be tested. This method introduces lean intergrowths and rich intergrowths for data correction to reduce errors, is closer to actual production, and can accurately determine the theoretical flotation recovery rate of gold ore products under conventional flotation methods, providing theoretical guidance for technical indicators of gold ore flotation processes.

Description

Technical Field

[0001] The present invention relates to the technical field of process mineralogy, and in particular to a method for calculating the theoretical flotation recovery rate of a gold ore product. Background Art

[0002] my country's gold ore resources are currently characterized by being "poor, fine, and mixed," making them difficult to process and smelt. This places high demands on gold smelting technology. Furthermore, my country's annual gold consumption far exceeds its production, and the rising gold price compels us to continuously pursue technological advancements in gold smelting, further efficiently recovering gold ore resources and transforming "inactive and waste ore" into valuable resources.

[0003] Currently, gold beneficiation technologies primarily focus on flotation and leaching. Leaching offers a relatively straightforward metric for optimal recovery, making it relatively straightforward to determine whether leachable gold can be efficiently recovered. However, determining optimal recovery in flotation presents a challenge, as there are no direct mineralogical parameters to guide the process. While free gold, metal-sulfide-associated gold, and metal-sulfide-encapsulated gold are the primary gold minerals to be recovered, some gold-bearing sulfides may be associated with gangue. Whether and how much of these sulfides can be recovered requires determination, and they cannot be directly classified as recoverable gold. Instead, they should be further categorized as either poorly associated or richly associated. Generally speaking, gangue-associated gold and gangue-encapsulated gold are more difficult to recover by flotation. However, gangue-associated gold with metal sulfides also contains a certain amount of gold (recoverable). Previous research methods have generally categorized these as gangue-associated gold (unrecoverable), leading to misleading data. Conventional selective dissolution methods fail to adequately address this issue, resulting in data errors. By studying the intergrowth characteristics of metal sulfides, the theoretical flotation recovery rate of gold ore products under conventional flotation methods can be determined more accurately.

[0004] Due to the complexity of gold's occurrence, efficient gold recovery is challenging. A method to accurately predict the theoretical recovery rate of a specific gold ore is highly desirable, guiding flotation processes to continuously improve technical indicators. Therefore, determining the theoretical recovery rate is a crucial metric for gold ore flotation, particularly when considering various technical indicators. Existing research methods and techniques are lacking in this area.

[0005] In view of this, it is necessary to design a method for calculating the theoretical flotation recovery rate of gold ore products to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a method for calculating the theoretical flotation recovery rate of gold ore products, which is used to determine the theoretical flotation recovery rate of gold ore products under conventional flotation means and guide the flotation process.

[0007] To achieve the above object, the present invention provides a method for calculating the theoretical flotation recovery rate of gold ore products, comprising the following steps: sampling and preparing a sample to be tested, and recording it as MLA sample a; then testing the content of the main metal sulfides in the MLA sample a, and recording it as b n , and statistically analyze the intercalation relationship of the main metal sulfides and the characteristics of gangue minerals in the MLA sample a; analyze the gold content of the main metal sulfides in the sample to be tested, and record it as c n , the unit is g / t; the sample to be tested is reselected and the gold grade of the sample to be tested is measured, which is recorded as M , unit is g / t; finally calculate the theoretical recovery rate of recoverable gold in the sample to be tested, recorded as W .

[0008] Furthermore, the MLA sample a is used for automatic mineralogical analysis.

[0009] Furthermore, the main metal sulfides refer to metal sulfides related to gold, and the main metal sulfides include pyrite, arsenopyrite, and chalcopyrite.

[0010] Furthermore, the intercalation relationship of the main metal sulfides in the MLA sample a is statistically analyzed, including the proportion of the main metal sulfides in the monomer state. L n , the total area of ​​major metal sulfides S n , the area of ​​main metal sulfides in the form of conjoined or encapsulated bodies S nq .

[0011] Furthermore, the characteristics of the gangue minerals in the MLA sample a are statistically analyzed, including the total area of ​​the gangue minerals. R , the total area of ​​gangue minerals in rich intergrowth T .

[0012] Furthermore, the main metal sulfides in the form of intergrowths include intergrowths with other metal sulfides, intergrowths with gangue and metal oxides - rich intergrowths, and intergrowths with gangue and metal oxides - poor intergrowths; the main metal sulfides in the form of inclusions include the state of being included in gangue or metal oxide inclusions.

[0013] Furthermore, the reselection process is as follows: taking a predetermined amount of the sample to be tested for reselection, and recording the reselection yield as t , gravity separation concentrate is recorded as j , gravity separation tailings are recorded as e ; Then analyze the gravity concentrate in full j The gold grade is recorded as f, unit is g / t, sample and analyze the gravity separation tailings e The gold grade is recorded as g , unit is g / t; the calculation formula of the gold grade of the sample to be tested is M = t * f +(1- t )* g .

[0014] Furthermore, n=x, y, z represent pyrite, arsenopyrite, and chalcopyrite, respectively; q=2, 31, 32, 4 represent the state of intergrowth with other metal sulfides, the state of intergrowth with gangue and metal oxides - rich intergrowth, the state of intergrowth with gangue and metal oxides - poor intergrowth, and the state of being wrapped by gangue or metal oxides, respectively.

[0015] Furthermore, the calculation process of the theoretical recovery rate of recoverable gold in the sample to be tested is:

[0016] S1. Calculate the ratio of the main metal sulfides in the state of intergrowth or encapsulation, and record it as L nq : L nq = S nq / S n ;

[0017] Calculate the ratio of the gangue minerals in the rich intergrowth form and record it as O : O = T / R ;

[0018] S2. Calculate the gold distribution rate of the main metal sulfide, which is recorded as d n ,but d n = b n * c n / M ;

[0019] Calculate the gold distribution rate of the gangue minerals and record it as V ,but V =1-∑ d n - t * f / M ;

[0020] S3. Calculate the ratio of the amount of optional metal sulfide minerals in the sample to be tested, and record it as h n,but h n = L n + L n2 + L n31 ;

[0021] S4. Calculate the theoretical recovery rate of the recoverable gold in the sample to be tested, then W =∑( d n * h n )+ O * V + t * f / M .

[0022] Furthermore, the method for determining the gold content of the main metal sulfide includes analyzing the gold grade by selecting a single mineral.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention provides a method for calculating the theoretical flotation recovery of a gold ore product. The method involves sampling a sample to be tested, preparing it into an MLA sample, then testing the content of the main metal sulfides in the MLA sample, and statistically analyzing the intercalation relationship and gangue mineral characteristics of the main metal sulfides in the MLA sample; analyzing the gold content of the main metal sulfides in the sample; reselecting the sample to test, and measuring the gold grade of the sample; and finally calculating the theoretical recovery of the recoverable gold in the sample. In this process, data correction is performed by introducing poor intergrowths and rich intergrowths to reduce errors, more closely resembling actual production conditions, and accurately calculating the theoretical recovery of a specific gold ore product. Furthermore, combined with automated mineralogical analysis, the data is further refined, eliminating subjective human factors and reducing workload. By studying the intergrowth characteristics of metal sulfides, this method can relatively accurately determine the theoretical flotation recovery of gold ore products under conventional flotation methods, providing theoretical guidance for the technical indicators of gold flotation processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention provides a flow chart of a method for calculating the theoretical flotation recovery rate of a gold ore product. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0028] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0029] like Figure 1 As shown, a method for calculating the theoretical flotation recovery rate of a gold ore product comprises the following steps:

[0030] The sample to be tested is sampled and prepared, and recorded as MLA sample a, and then the MLA sample a is subjected to automatic mineralogical analysis: the content of the main metal sulfide in the MLA sample a is tested and recorded as b n ; and statistically analyze the intercalation relationship of the main metal sulfides and the characteristics of the gangue minerals in the MLA sample a;

[0031] The intercalation relationship of the main metal sulfides in the MLA sample a is statistically analyzed, including the proportion of the main metal sulfides in the monomer state (i.e., the proportion of a certain metal sulfide in the monomer state to the total amount of this metal sulfide, also known as the degree of dissociation). L n , the total area of ​​major metal sulfides S n , the area of ​​main metal sulfides in the form of conjoined or encapsulated bodies S nq ; Statistical characteristics of gangue minerals in the MLA sample a include the total area of ​​gangue minerals R , the total area of ​​gangue minerals in rich intergrowth T ;

[0032] The main metal sulfides in the form of intergrowth include intergrowth with other metal sulfides, intergrowth with gangue and metal oxides - rich intergrowth state, and intergrowth with gangue and metal oxides - poor intergrowth state; the main metal sulfides in the form of inclusion include inclusion with gangue or metal oxides;

[0033] Among them, the main metal sulfides refer to metal sulfides correlated with gold, and the main metal sulfides include pyrite, arsenopyrite, and chalcopyrite; being in an encapsulated state means that the target mineral is tightly encapsulated by other minerals without leakage at the edges; the poor and rich intergrowths of metal sulfides and gangue are counted using the area method, that is, the area of ​​a certain metal sulfide intergrowth is compared with the area of ​​the gangue mineral to determine the poor and rich intergrowth; when the area of ​​the metal sulfide is larger than the area of ​​the gangue, it is recorded as a rich intergrowth; when the area of ​​the metal sulfide is less than or equal to the area of ​​the gangue, it is recorded as a poor intergrowth; the classification criteria for poor and rich intergrowths may vary for different ores or different reagent systems.

[0034] Analyze the gold content of the main metal sulfides in the sample to be tested, and record it as c n , unit is g / t;

[0035] The sample to be tested is reselected and the gold grade of the sample to be tested is measured and recorded as M , unit is g / t;

[0036] The gravity separation process is as follows: in order to eliminate the interference of coarse-grained monomer gold and obtain a more accurate gold grade of the sample to be tested, a predetermined amount of the sample to be tested is taken for gravity separation, and the gravity separation yield is recorded as t , gravity separation concentrate is recorded as j , gravity separation tailings are recorded as e Then, in order to obtain the accurate gold grade of the sample to be tested, the gravity separation concentrate j The gold grade of the whole amount is analyzed and recorded as f , the unit is g / t, and at the same time the gravity separation tailings e The gold grade of g , unit is g / t; the calculation formula of the gold grade of the sample to be tested is M = t * f +(1- t )* g .

[0037] Finally, the theoretical recovery rate of the recoverable gold in the sample to be tested is calculated and recorded as W ,

[0038] The calculation process of the theoretical recovery rate of recoverable gold in the sample to be tested is:

[0039] S1. Calculate the ratio of the main metal sulfides in the state of intergrowth or encapsulation, and record it as L nq : L nq = S nq / Sn ;

[0040] Calculate the ratio of the gangue minerals in the rich intergrowth form and record it as O : O = T / R ;

[0041] S2. Calculate the gold distribution rate of the main metal sulfide, which is recorded as d n ,but d n = b n * c n / M ;

[0042] Calculate the gold distribution rate of the gangue minerals and record it as V ,but V =1-∑ d n - t * f / M ;

[0043] S3. Calculate the ratio of the amount of optional metal sulfide minerals in the sample to be tested, and record it as h n ,but h n = L n + L n2 + L n31 ;

[0044] S4. Calculate the theoretical recovery rate of the recoverable gold in the sample to be tested, then W =∑( d n * h n )+ O * V + t * f / M ;

[0045] Where n = x, y, z, representing pyrite, arsenopyrite, and chalcopyrite, respectively;

[0046] q=2, 31, 32, 4, respectively represent the state of intergrowth with other metal sulfides, the state of intergrowth with gangue and metal oxides - rich intergrowth, the state of intergrowth with gangue and metal oxides - poor intergrowth, and the state of being surrounded by gangue or metal oxides.

[0047] This setup, by introducing poor and rich intergrowths for data correction, reduces errors, brings it closer to actual production conditions, and accurately calculates the theoretical recovery rate for a specific gold ore product. Furthermore, by combining it with automated mineralogical analysis, the data becomes even more precise, eliminating subjective human factors and reducing workload.

[0048] Furthermore, in some embodiments of the present invention, the method for determining the gold content of the main metal sulfide includes analyzing the gold grade by selecting a single mineral.

[0049] The following is an explanation of the working method of the method for calculating the theoretical flotation recovery rate of a gold ore product provided by the present invention: Example

[0050] This embodiment provides a method for calculating the theoretical flotation recovery rate of a gold ore product, comprising the following steps:

[0051] The sample to be tested is sampled and prepared, and recorded as MLA sample a, and then the MLA sample a is subjected to automatic mineralogical analysis: the content of pyrite in the MLA sample a is measured. b x , the content of arsenopyrite b y , see Table 1 for details; and statistically analyze the intercalation relationship of the main metal sulfides and the characteristics of the gangue minerals in the MLA sample a;

[0052] Statistical analysis of the proportion of monomeric pyrite in the MLA sample a to the total amount of pyrite L x , the proportion of arsenopyrite in monomeric state to the total amount of arsenopyrite L y ; Total area of ​​pyrite S x 、Total area of ​​arsenopyrite S y ; The area of ​​pyrite in the form of intergrowth or inclusion S xq , the area of ​​arsenopyrite in a conjoined or wrapped state S yq ; Count the total area of ​​gangue minerals in the MLA sample a R , the total area of ​​gangue minerals in rich intergrowth T , see Table 2 for details 。

[0053] The gold content of pyrite in the sample to be tested is analyzed by selecting a single mineral analysis and gold grade analysis. c x , the gold content of arsenopyrite c y , see Table 1 for details;

[0054] Take 5 kg of the sample to be tested for gravity separation, and measure the gold grade of the sample to be tested, which is recorded as M , unit is g / t;

[0055] The gravity separation process is as follows: 5 kg of the sample to be tested is taken for gravity separation, and the gravity separation yield is t= 0.1%, gravity separation concentrate is recorded as j , gravity separation tailings are recorded as e ; Then, the gravity separation concentrate j The results of the full analysis of the gold grade are f= 41.25g / t, while the gravity separation tailings e The gold grade of the samples was analyzed as follows: g =2.03g / t;

[0056] Gold grade of the sample to be tested M =0.1%*41.25+(1-0.1%)*2.03=2.07g / t.

[0057] Finally, the theoretical recovery rate of the recoverable gold in the sample to be tested is calculated and recorded as W ,

[0058] The calculation process of the theoretical recovery rate of recoverable gold in the sample to be tested is:

[0059] S1. Calculate the proportion of pyrite in the form of intergrowth or inclusions: L xq = S xq / S x ,

[0060] The proportion of arsenopyrite in the form of conjoined or encapsulated particles is calculated as follows: L yq = S yq / S y ;

[0061] Calculate the proportion of the gangue minerals in the rich intergrowth for : O = T / R , see Table 3 for details;

[0062] S2. Calculate the gold distribution rate of pyrite: d x = b x * c x / M ,

[0063] The gold distribution rate of arsenopyrite is calculated as follows: d y = b y * c y / M ;

[0064] The gold distribution rate of the gangue mineral is calculated as follows: V =1-( d x + d y )- t * f / M , see Table 1 for details;

[0065] S3. Calculate the ratio of the amount of the optional metal sulfide minerals in the sample to be tested, as follows:

[0066] The optional pyrite mineral mass ratio is: h x = L x + L x2 + L x31 =91.50%+0.56%+2.26%=94.32%, optional arsenopyrite mineral content ratio h y = L y + L y2 + L y31 =90.22%+0.98%+1.64%=92.84%;

[0067] S4. Calculate the theoretical recovery rate of the recoverable gold in the sample to be tested, then W =( d x * h x + d y * h y )+ O * V + t * f / M= 91.76%;

[0068] Where n = x, y, representing pyrite and arsenopyrite, respectively;

[0069] q=2, 31, 32, 4, respectively represent the state of intergrowth with other metal sulfides, the state of intergrowth with gangue and metal oxides - rich intergrowth, the state of intergrowth with gangue and metal oxides - poor intergrowth, and the state of being surrounded by gangue or metal oxides.

[0070]

[0071]

[0072]

[0073] In summary, the present invention provides a method for calculating the theoretical flotation recovery rate of gold ore products. The method comprises sampling a sample to be tested and preparing it into an MLA sample. The method then tests the content of the main metal sulfides in the MLA sample and statistically analyzes the intercalation relationship and gangue mineral characteristics of the main metal sulfides in the MLA sample. The method then analyzes the gold content of the main metal sulfides in the sample to be tested. The method then reselects the sample to be tested and measures the gold grade of the sample to be tested. Finally, the method calculates the theoretical recovery rate of the recoverable gold in the sample to be tested. This method introduces poor intergrowths and rich intergrowths to correct the data, reducing errors and being closer to actual production conditions. The method can accurately calculate the theoretical recovery rate of the gold ore product. Furthermore, the method is combined with automatic mineralogical analysis to make the data more accurate, avoid human subjective factors, and save workload. By studying the intergrowth characteristics of metal sulfides, this method can more accurately determine the theoretical flotation recovery rate of the gold ore product under conventional flotation means, providing theoretical guidance for the technical indicators of the gold flotation process.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for calculating the theoretical flotation recovery of gold ore products, characterized in that: The method comprises the following steps: sampling and preparing the sample to be tested, and recording it as MLA sample a; then testing the content of the main metal sulfide in the MLA sample a, and recording it as b. n , and statistically analyze the intercalation relationship of the main metal sulfides and the characteristics of the gangue minerals in the MLA sample a; Analyze the gold content of the main metal sulfide in the sample to be tested, denoted as c n , in g / t; performing gravity separation on the sample to be tested, and measuring the gold grade of the sample to be tested, recorded as M, in g / t; and finally calculating the theoretical recovery rate of the recoverable gold in the sample to be tested, recorded as W; The intercalation relationship of the main metal sulfides in the MLA sample a is statistically analyzed, including the proportion of the main metal sulfides in the monomer state. n , the total area of ​​main metal sulfides S n , the area S of the main metal sulfides in the form of conjoined or encapsulated bodies nq The main metal sulfides in the form of intergrowth include intergrowth with other metal sulfides, intergrowth with gangue and metal oxides - rich intergrowth state, and intergrowth with gangue and metal oxides - poor intergrowth state; the main metal sulfides in the form of inclusion include the state of inclusion by gangue or metal oxides; n = x, y, z, respectively representing pyrite, arsenopyrite, and chalcopyrite; q = 2, 31, 32, 4, respectively representing intergrowth with other metal sulfides, intergrowth with gangue and metal oxides - rich intergrowth state, intergrowth with gangue and metal oxides - poor intergrowth state, and the state of inclusion by gangue or metal oxides; The characteristics of the gangue minerals in the MLA sample a are statistically analyzed, including the total area R of the gangue minerals and the total area T of the gangue minerals in the form of rich intergrowths; The gravity separation process is as follows: taking a predetermined amount of the sample to be tested for gravity separation, recording the gravity separation yield as t, the gravity separation concentrate as j, and the gravity separation tailings as e; then analyzing the gold grade of the gravity separation concentrate j in full, recording it as f, in units of g / t, sampling and analyzing the gold grade of the gravity separation tailings e, recording it as g, in units of g / t; the gold grade of the sample to be tested is calculated as M=t*f+(1-t)*g; The calculation process of the theoretical recovery rate of recoverable gold in the sample to be tested is: S1. Calculate the ratio of the main metal sulfides in the state of intergrowth or encapsulation, and record it as L nq :L nq =S nq / S n ; Calculate the ratio of the gangue minerals in the rich intergrowth form, and record it as O: O = T / R; S2. Calculate the gold distribution rate of the main metal sulfide, denoted as d n , then d n =b n *c n / M; Calculate the gold distribution rate of the gangue mineral, denoted as V, then V = 1-∑d n -t*f / M; S3. Calculate the ratio of the amount of the optional metal sulfide minerals in the sample to be tested, denoted as h n , then h n =L n +L n2 +L n31 ; S4. Calculate the theoretical recovery rate of the recoverable gold in the sample to be tested, then W = ∑(d n *h n )+O*V+t*f / M.

2. The method for calculating the theoretical flotation recovery of gold ore products according to claim 1, wherein: The MLA sample a was used for automated mineralogical analysis.

3. The method for calculating the theoretical flotation recovery of gold ore products according to claim 2, wherein: The main metal sulfides refer to metal sulfides related to gold, and the main metal sulfides include pyrite, arsenopyrite, and chalcopyrite.

4. The method for calculating the theoretical flotation recovery of gold ore products according to claim 1, wherein: The method for determining the gold content of the major metal sulfide includes the use of selected single mineral analysis to assay the gold grade.

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