Method for calculating the recovery of gold ore based on the interlocking relationship of gold minerals

Abstract

The application discloses a kind of based on gold mineral intergrowth relationship's flotation recovery rate calculation method, it is related to process mineralogy technical field, and it is judged by area size comparison to be poor intergrowth and rich intergrowth, and the intergrowth relationship of metal sulfide is divided into five states, the average recoverable sulfide proportion is calculated using the detection result of automatic mineral analyzer, to calculate the recoverable gold in gold and metal sulfide intergrowth gold wrapped in metal sulfide, avoid the calculation accuracy of recovery rate from the poor intergrowth body recoverable and influence, simultaneously using the proportion of rich intergrowth body gangue mineral, in combination with the gold distribution rate in gangue, the recoverable gold in gangue that is intergrowth with metal sulfide is calculated, and then on the basis of gold mineral intergrowth relationship, the calculation accuracy of recovery rate is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of process mineralogy, and particularly relates to a flotation recovery rate calculation method based on the intergrowth relationship of gold minerals. BACKGROUND

[0002] China is a large gold consumer, and a large amount of gold is needed in the fields of gold and silver jewelry and finance and industry. However, with the continuous exploitation of gold mines, the gold resources in China gradually turn into refractory metallurgical resources, and therefore it is necessary to continuously improve the technical level to achieve efficient recovery of gold ore resources.

[0003] The flotation process is the main means of gold recovery, but it is difficult to determine the optimal recovery rate, and direct process mineralogy parameters are needed as a reference. In the process of mineralogy research, according to the intergrowth relationship of gold in gold ore, the intergrowth relationship of gold can be divided into single gold, associated gold with metal sulfide, associated gold with gangue, gold wrapped by metal sulfide, gold wrapped by gangue, and carbon adsorption gold. The general conventional flotation combined with gravity separation process can effectively recover single gold, associated gold with metal sulfide, gold wrapped by metal sulfide, and carbon adsorption gold, while associated gold with gangue and gold wrapped by gangue are more difficult to recover by flotation.

[0004] Previous studies believe that associated gold with metal sulfide and gold wrapped by metal sulfide can be fully recovered, but in fact, part of the metal sulfide associated with the metal sulfide and the gangue is associated with the gangue, and when the two are in a poor association, it is very difficult to effectively recover, and it cannot be generally believed that these gold can be fully recovered. At the same time, the gangue associated with the metal sulfide also contains a certain amount of gold, and previous research methods generally divide it into associated gold with gangue, and this part of gold also needs to be judged whether it can be recovered. The previous selective leaching method does not well solve the above problems, resulting in certain errors in the calculated recovery rate data.

[0005] Therefore, it is necessary to design a flotation recovery rate calculation method based on the intergrowth relationship of gold minerals to solve the above problems. SUMMARY

[0006] The present application relates to the technical field of process mineralogy, and particularly relates to a flotation recovery rate calculation method based on the intergrowth relationship of gold minerals.

[0007] To achieve the above-mentioned application purposes, the present application provides a flotation recovery rate calculation method based on the intergrowth relationship of gold minerals, comprising the following steps:

[0008] S1, sample the sample to be tested to prepare a sample a for automatic mineralogical analysis equipment;

[0009] S2, performing automatic mineralogical analysis on the sample a prepared in step S1 to obtain a plurality of metal sulfide contents b i ;

[0010] S3, according to the area size comparison of the metal sulfide and the gangue connected with the metal sulfide, the intergrowth state of the metal sulfide and the gangue and the metal oxide is judged to be poor intergrowth and rich intergrowth, the metal sulfide in intergrowth or inclusion state is divided into a plurality of states according to the intergrowth relationship of the metal sulfide, and the monomer dissociation degree L of the metal sulfide is obtained by automatic mineralogical analysis equipment analysis i And the proportion L of a plurality of states of the metal sulfide in intergrowth or inclusion state iq , the optional metal sulfide mineral amount proportion h i , and then combined with the metal sulfide content b i , the average recoverable sulfide proportion J is calculated;

[0011] S4, according to the gangue characteristics of the rich intergrowth body of the metal sulfide, the proportion O of the gangue mineral in the rich intergrowth body is calculated by using the automatic mineralogical detection result;

[0012] S5, the metal sulfide intergrowth relationship of the sample is investigated, the proportion O of the gangue mineral in the rich intergrowth body obtained in step S4 is combined to calculate the recoverable gold in the gangue in the rich intergrowth state with the metal sulfide, and the average recoverable sulfide proportion J obtained in step S3 is combined to calculate the recoverable gold in the intergrowth gold with the metal sulfide and the inclusion gold with the metal sulfide, so as to obtain the flotation recovery rate W of the gold ore product on the basis of the metal sulfide intergrowth relationship.

[0013] As a further improvement of the present application, in step S3, the area size comparison is specifically: when the area of the metal sulfide is greater than the area of the gangue connected with the metal sulfide, it is recorded as rich intergrowth; when the area of the metal sulfide is less than or equal to the area of the gangue connected with the metal sulfide, it is recorded as poor intergrowth.

[0014] As a further improvement of the present application, in step S5, the metal sulfide intergrowth relationship includes monomer gold U1, intergrowth gold U2 with metal sulfide, intergrowth gold U3 with gangue, metal sulfide inclusion gold U4, gangue inclusion gold U5, and carbon adsorption gold U6.

[0015] As a further improvement of the present application, the calculation of the recoverable gold in the paragenetic gold with metal sulfide and the gold wrapped by metal sulfide is specifically: through the paragenetic gold U2 and the gold wrapped by metal sulfide U4, combined with the average recoverable sulfide ratio J, the recoverable gold in the paragenetic gold with metal sulfide and the gold wrapped by metal sulfide is obtained.

[0016] As a further improvement of the present application, the calculation of the recoverable gold in the gangue with rich paragenetic body of metal sulfide is specifically: through the gold distribution rate in the gangue characterized by the paragenetic gold U3 and the gangue wrapped gold U5, combined with the proportion of the gangue mineral with rich paragenetic body O, the recoverable gold in the gangue with rich paragenetic body of metal sulfide is obtained.

[0017] As a further improvement of the present application, it is characterized in that: i=1, 2, 3…, wherein 1, 2, 3… respectively represent different kinds of metal sulfide.

[0018] As a further improvement of the present application, in step S3, the metal sulfide in the paragenetic or wrapped state is divided into four states according to the metal sulfide embedded relationship, including the paragenetic state with other metal sulfides, the paragenetic-rich body state with gangue and metal oxide, the paragenetic-poor body state with gangue and metal oxide, and the wrapped state of gangue or metal oxide; the proportion L of the four states of the metal sulfide in the paragenetic or wrapped state iq The calculation of the four states of the metal sulfide in the paragenetic or wrapped state is specifically: through the automatic mineralogical analysis equipment, the total area S of the metal sulfide i , the area S of the four states of the metal sulfide in the paragenetic or wrapped state iq , L iq =S iq / S i , wherein q is x, y1, y2, z, respectively representing the paragenetic state with other metal sulfides, the paragenetic-rich body state with gangue and metal oxide, the paragenetic-poor body state with gangue and metal oxide, and the wrapped state of gangue or metal oxide.

[0019] As a further improvement of the present application, in step S3, the optional metal sulfide mineral amount proportion h i =L i +L ix +L iy1 , the average recoverable sulfide ratio J=∑h i ×b i / ∑b i .

[0020] As a further improvement of the present application, the calculation of the proportion of the gangue mineral in the rich intergrowth O in step S4 is specifically: measuring the total area R of the gangue mineral and the total area T of the gangue mineral in the rich intergrowth by the automatic mineralogical analysis equipment, and O=T / R.

[0021] As a further improvement of the present application, the flotation recovery rate W of the gold ore product is W=U1+ (U2+ U4) x J+ U6+ (U3+ U5) x O.

[0022] As a further improvement of the present application, the metal sulfide is a gold-related metal sulfide; and the automatic mineralogical analysis equipment is an automatic mineral analyzer.

[0023] The present application has the following beneficial effects:

[0024] On the basis of the intergrowth relationship of gold minerals, the present application further judges the intergrowth state of the metal sulfide and the gangue and the metal oxide in the intergrowth gold and the gold wrapped by the metal sulfide according to the area size comparison between the metal sulfide and the gangue connected with the metal sulfide, so as to avoid the influence on the calculation of the recovery rate due to the consideration of the recovery of the lean intergrowth, and to improve the calculation accuracy of the recovery rate. In addition, the proportion of the gangue mineral in the rich intergrowth is calculated, and the gold distribution rate in the gangue is represented by the gold intergrowth with the gangue and the gold wrapped by the gangue in the intergrowth relationship of gold minerals, so as to calculate the recoverable gold in the gangue in the rich intergrowth state with the metal sulfide, so that the calculation result of the recovery rate of the present application is more accurate and closer to the actual production situation.

[0025] The flotation recovery rate calculation method based on the intergrowth relationship of gold minerals of the present application can accurately and reasonably obtain the flotation recovery rate of the gold ore product and accurately predict the theoretical recovery rate of a certain gold ore product by calculating the recoverable gold in the intergrowth gold and the gold wrapped by the metal sulfide and the recoverable gold in the gangue in the rich intergrowth state with the metal sulfide on the basis of the intergrowth relationship of gold minerals, so as to provide reliable data support for efficient utilization of gold ore resources.

[0026] Compared with the existing recovery rate calculation method by gold leaching, the present application can reduce the calculation time and improve the rationality and accuracy of the data by judging the lean and rich intergrowth by the area method while avoiding the loss of the intergrowth gold. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a design idea diagram of the flotation recovery rate calculation method based on the intergrowth relationship of gold minerals of the present application. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in detail below with reference to the drawings and specific embodiments.

[0029] It should also be noted that, in order to avoid obscuring the present application with unnecessary details, only the structures and / or processing steps closely related to the solutions of the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0030] In addition, it should also be noted that the terms "comprise", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device.

[0031] As shown in Figure 1 , the present application provides a flotation recovery rate calculation method based on the intergrowth relationship of gold minerals, comprising the following steps:

[0032] S1, sampling and preparing a sample a for automatic mineral analyzer analysis on the sample to be tested;

[0033] S2, performing automatic mineralogical analysis on the sample a prepared in step S1 to obtain a plurality of metal sulfide contents b i ;

[0034] S3, judging the intergrowth state of metal sulfides and gangue and metal oxides according to the area size comparison of metal sulfides and gangue connected with the metal sulfides, and dividing the metal sulfides in intergrowth or inclusion state into four states according to the intergrowth relationship of metal sulfides, i.e. intergrowth state with other metal sulfides, intergrowth-rich intergrowth body state with gangue and metal oxides, intergrowth-poor intergrowth body state with gangue and metal oxides, and gangue or metal oxide inclusion state, obtaining the monomer dissociation degree L i of the metal sulfides and the proportion L iq of the four states of the metal sulfides in intergrowth or inclusion state by automatic mineral analyzer analysis, calculating the proportion h i of the optional metal sulfide mineral amount, and further combining the metal sulfide content b i to calculate the average recoverable sulfide proportion J;

[0035] S4, calculating the proportion O of the rich intergrowth body gangue mineral according to the characteristics of the metal sulfide-rich intergrowth body gangue and using the automatic mineralogical detection results;

[0036] S5, the proportion of the gangue minerals in the rich intergrowth state with the metal sulfide is calculated based on the proportion O of the gangue minerals in the rich intergrowth obtained in step S4 and the recoverable gold in the gangue minerals in the rich intergrowth state with the metal sulfide, and the proportion J of the average recoverable sulfide is combined with the calculation of the recoverable gold in the intergrowth gold with the metal sulfide and the gold wrapped by the metal sulfide, so as to obtain the flotation recovery rate W of the gold ore product on the basis of the intergrowth relationship of the gold minerals.

[0037] Specifically, i=1, 2, 3…, wherein 1, 2, 3… respectively represent different kinds of metal sulfides, including pyrite, arsenopyrite, chalcopyrite, etc.

[0038] Specifically, in step S3, the area size comparison standard for judging the poor intergrowth and the rich intergrowth is changed according to the different ores and reagents, and in this embodiment, the area size comparison is specifically as follows: when the area of the metal sulfide is greater than the area of the gangue connected therewith, it is recorded as a rich intergrowth, and when the area of the metal sulfide is less than or equal to the area of the gangue connected therewith, it is recorded as a poor intergrowth.

[0039] Specifically, in step S3, the proportion L of the four states of the metal sulfide in the intergrowth or wrapped state iq is calculated as follows: the total area Si of the metal sulfide and the area S iq of the four states of the metal sulfide in the intergrowth or wrapped state are obtained by automatic mineral analysis, and L iq =S iq / S i , wherein q is x, y1, y2, z, respectively representing the intergrowth state with other metal sulfides, the intergrowth-rich intergrowth state with the gangue and the metal oxide, the intergrowth-poor intergrowth state with the gangue and the metal oxide, and the wrapped state with the gangue or the metal oxide.

[0040] Specifically, in step S3, the proportion h of the optional metal sulfide mineral amount i =L i +L ix +L iy1 , and the average recoverable sulfide proportion J=∑h i ×b i / ∑b i .

[0041] Specifically, in step S4, the proportion O of the gangue minerals in the rich intergrowth is calculated as follows: the total area R of the gangue minerals and the total area T of the gangue minerals in the rich intergrowth are measured by the automatic mineral analyzer, and O=T / R.

[0042] Specifically, in step S5, the gold mineral intergrowth relationship includes single gold U1, paragenetic gold with metal sulfide U2, paragenetic gold with gangue U3, gold in metal sulfide inclusions U4, gold in gangue inclusions U5, and carbon adsorbed gold U6; the calculation of the recoverable gold in the paragenetic gold with metal sulfide and the gold in metal sulfide inclusions is specifically: the recoverable gold in the paragenetic gold with metal sulfide and the gold in metal sulfide inclusions is obtained by combining the paragenetic gold U2 with metal sulfide and the gold in metal sulfide inclusions U4, and the average recoverable sulfide ratio J.

[0043] Specifically, the gold ore product flotation recovery rate W = U1 + (U2 + U4) × J + U6 + (U3 + U5) × O.

[0044] Specifically, the metal sulfide is a gold-related metal sulfide.

[0045] Specifically, the single dissociation degree is the proportion of metal sulfide in a single state, and the single state refers to the absence of other minerals associated with a certain metal sulfide around the certain metal sulfide, and the dissociation degree refers to the proportion of the certain metal sulfide in a single state in the total amount of the certain metal sulfide.

[0046] Specifically, the inclusion state refers to the state in which the target mineral is tightly wrapped by other minerals, and the edge is not leaked.

[0047] The gold mineral intergrowth relationship-based flotation recovery rate calculation method provided by the present application will be described below in combination with specific examples.

[0048] Example 1

[0049] The present embodiment provides a gold mineral intergrowth relationship-based flotation recovery rate calculation method, which comprises the following steps:

[0050] S1, sample preparation for MLA (automatic mineral analyzer) analysis sample a for the sample to be tested;

[0051] S2, performing automatic mineralogical analysis on the sample a prepared in step S1 to obtain the mineral content b1 of pyrite and the mineral content b2 of arsenopyrite, as shown in Table 1;

[0052] S3, counting the intergrowth relationship characteristics of pyrite and arsenopyrite in step S2, and obtaining the total area S1 of pyrite, the paragenetic area S2 of pyrite and other metal sulfides, the paragenetic-gangue area S3 of pyrite and gangue and metal oxides, and the paragenetic-gangue area S4 of pyrite and gangue and metal oxides by automatic mineral analyzer analysis. 1x 1y1 ​, the pyrite and gangue and metal oxide intergrowth-poor intergrowth area S 1y2 , the gangue or metal oxide inclusion area S of the pyrite 1z , and the total area S2 of arsenopyrite, the arsenopyrite and other metal sulfide intergrowth area S 2x , the arsenopyrite and gangue and metal oxide intergrowth-rich intergrowth area S 2y1 , the arsenopyrite and gangue and metal oxide intergrowth-poor intergrowth area S 2y2 , the gangue or metal oxide inclusion area S of the arsenopyrite 2z , as shown in Table 2, and the monomer dissociation degree L1 of pyrite and the monomer dissociation degree L2 of arsenopyrite, as shown in Table 3;

[0053] According to L iq =S iq / S i The metal sulfide proportions of the four states of pyrite and arsenopyrite are calculated by the calculation formula, and the optional pyrite mineral proportion h1 = 93.42% + 0.52% + 2.11% = 96.05% and the optional arsenopyrite mineral proportion h2 = 91.55% + 0.75% + 1.50% = 93.80% are calculated, as shown in Table 3, and then the average recoverable sulfide proportion J is obtained in combination with the mineral content b1 of pyrite and the mineral content b2 of arsenopyrite, J = (6.42 x 96.05 + 3.15 x 93.80) / (6.42 + 3.15) = 95.31%;

[0054] S4, according to the gangue characteristics of the metal sulfide rich intergrowth, the total area R of the gangue minerals is measured by using an automatic mineral analyzer, and the total area T of the gangue minerals in the rich intergrowth is measured, as shown in Table 2, and the proportion O of the gangue minerals in the rich intergrowth is calculated according to O = T / R, as shown in Table 3;

[0055] S5, the gold mineral intergrowth relationship of the sample is examined, as shown in Table 4, and then the flotation recovery rate W of the gold ore product is U1 + (U2 + U4) x J + U6 + (U3 + U5) x O = 91.30%.

[0056] Table 1 Mineral content results

[0057]

[0058] Table 2 Metal sulfide intergrowth system calculation results

[0059]

[0060] Table 3 Metal sulfide intergrowth relationship examination results

[0061]

[0062] Table 4 Gold mineral intergrowth relationship test results

[0063]

[0064] In summary, the gold mineral intergrowth relationship-based flotation recovery rate calculation method disclosed in the present application judges the poor intergrowth and rich intergrowth through area size comparison, and divides the metal sulfide intergrowth relationship into five states, i.e., intergrowth state with other metal sulfides, intergrowth-rich intergrowth body state with gangue and metal oxides, intergrowth-poor intergrowth body state with gangue and metal oxides, gangue or metal oxide wrapping state, and single state. The automatic mineral analyzer is used to detect the area of each part, the single liberation degree, the metal sulfide content, and the total area of the gangue mineral in the rich intergrowth body, so as to calculate the average recoverable sulfide proportion and the proportion of the gangue mineral in the rich intergrowth body. Then, the average recoverable sulfide proportion is used to calculate the recoverable gold in the gold intergrown with the metal sulfide and the gold wrapped by the metal sulfide, so as to avoid the influence of the calculation accuracy of the recovery rate due to the poor intergrowth body. Meanwhile, the proportion of the gangue mineral in the rich intergrowth body is used to calculate the recoverable gold in the gangue in the rich intergrowth body with the metal sulfide, in combination with the gold distribution rate in the gangue. Thus, on the basis of the gold mineral intergrowth relationship, the calculation accuracy of the recovery rate is effectively improved.

[0065] The above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application.

Claims

1. A method for calculating flotation recovery rate based on the intercalation relationship of gold minerals, characterized in that, Includes the following steps: S1. Sample a is prepared for the automated mineralogy analysis equipment by taking samples from the samples to be tested; S2. Perform automated mineralogical analysis on sample a obtained in step S1 to obtain the content of several metal sulfides b. i ; S3. Based on the comparison of the area size of the metal sulfide and the gangue connected to the metal sulfide, the intergrowth state of the metal sulfide with gangue and metal oxide is judged as either poor or rich intergrowth. Metal sulfides in intergrowth or encapsulated state are divided into several states according to the intergrowth relationship of metal sulfides. The degree of liberation L of the metal sulfide monomer is obtained by analyzing with an automated mineralogical analysis device. i And the proportion L of metal sulfides in several states, including intergrowths or encapsulated states. iq The proportion h of optional metal sulfide minerals was calculated. i Furthermore, this is combined with the metal sulfide content b i Calculate the average recyclable sulfide ratio J; i = 1, 2, 3..., where 1, 2, 3... represent different types of metal sulfides; The metal sulfides in the intergrowth or encapsulated state are divided into four states according to the interlocking relationship of the metal sulfides, including the intergrowth state with other metal sulfides, the intergrowth state with gangue and metal oxides - rich intergrowth state, the intergrowth state with gangue and metal oxides - poor intergrowth state, and the encapsulation state of gangue or metal oxides. The proportion of the four states of the metal sulfide, which are either intercalated or encapsulated, is L. iq The calculation specifically involves: obtaining the total area S of metal sulfides through automated mineralogical analysis equipment. i The area S of metal sulfides in four states: intergrowth, encapsulation, etc. iq L iq =S iq / S i , where q is x, y1, y2, z, representing the states of intergrowth with other metal sulfides, intergrowth with gangue and metal oxides in a rich intergrowth state, intergrowth with gangue and metal oxides in a poor intergrowth state, and gangue or metal oxide encapsulation state, respectively. S4. Based on the characteristics of metal sulfide-rich intergrowth gangue, the proportion of minerals present as intergrowth gangue minerals (O) is calculated using the results of automated mineralogical analysis. S5. Examine the gold mineral intergrowth relationship of the sample. Combine the proportion O of the gangue minerals rich in intergrowth obtained in step S4 to calculate the recoverable gold in the gangue that is rich in intergrowth with metal sulfides. At the same time, combine the average recoverable sulfide proportion J obtained in step S3 to calculate the recoverable gold in the gold intergrowth with metal sulfides and the gold encapsulated in metal sulfides. Thus, based on the gold mineral intergrowth relationship, the flotation recovery rate W of the gold ore product is obtained. The gold mineral intercalation relationships include single gold U1, gold intercalated with metal sulfides U2, gold intercalated with gangue U3, gold encapsulated in metal sulfides U4, gold encapsulated in gangue U5, and gold adsorbed on carbon U6. The calculation of recoverable gold in metal sulfide-linked gold U2 and metal sulfide-encapsulated gold U4 is as follows: by combining the average recoverable sulfide ratio J with metal sulfide-linked gold U2 and metal sulfide-encapsulated gold U4, the recoverable gold in metal sulfide-linked gold and metal sulfide-encapsulated gold is obtained. The calculation of recoverable gold in gangues that are intergrowths with metal sulfides is as follows: The gold distribution rate in gangues is characterized by intergrowth gold U3 and gangue-encapsulated gold U5, and combined with the proportion O of gangue minerals that are intergrowths, the recoverable gold in gangues that are intergrowths with metal sulfides is obtained.

2. The flotation recovery calculation method based on the intercalation relationship of gold minerals according to claim 1, characterized in that: In step S3, the area comparison is specifically as follows: when the area of ​​the metal sulfide is greater than the area of ​​the gangue connected to the metal sulfide, 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 connected to the metal sulfide, it is recorded as a poor intergrowth.

3. The flotation recovery calculation method based on the intercalation relationship of gold minerals according to claim 1, characterized in that: In step S3, the proportion h of the optional metal sulfide minerals i =L i +L ix +L iy1 The average recyclable sulfide ratio J = ∑h i *b i / ∑b i .

4. The flotation recovery calculation method based on the intercalation relationship of gold minerals according to claim 3, characterized in that: In step S4, the calculation of the proportion O of the gangue minerals in the rich intergrowth is as follows: the total area R of the gangue minerals and the total area T of the gangue minerals in the rich intergrowth are measured by an automatic mineralogical analysis device, and O = T / R.

5. The flotation recovery calculation method based on the intercalation relationship of gold minerals according to claim 4, characterized in that: The flotation recovery rate of gold ore products is W = U1 + (U2 + U4) * J + U6 + (U3 + U5) * O.

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