Method for determining the degree of dissociation of molybdenum ore samples

Abstract

The application provides a method for determining the dissociation degree of a molybdenum ore sample, and belongs to the field of process mineralogy, wherein the dissociation degrees of each particle size are determined by using the exposed edge length proportion method and the area ratio method respectively by distinguishing between flaky and granular molybdenum minerals, and the relative content of molybdenum sulfide obtained by chemical phase analysis is introduced for correction, and finally the comprehensive dissociation degree of the sample is calculated by weighting according to the yield of each particle size. The application effectively eliminates the problem of false high dissociation degree of flaky minerals caused by the deviation of two-dimensional projection area by distinguishing between flaky and granular molybdenum minerals and using the exposed edge length proportion method and the area ratio method respectively, and setting a unified dissociation degree division threshold. At the same time, the correction is carried out by introducing the distribution coefficient of chemical phase analysis, and a three-dimensional weighting model is constructed by combining the particle size yield, the mineral form and the phase, so that the comprehensive dissociation degree of the whole sample is highly matched with the actual beneficiation recovery effect.

Description

Technical Field

[0001] This invention relates to the field of process mineralogy, specifically to a method for determining the degree of liberation of molybdenum ore samples. Background Technology

[0002] Mineral liberation degree is a key parameter for measuring the degree of separation between valuable minerals and gangue minerals. It directly reflects the grinding effect and provides a core basis for optimizing the conditions of beneficiation processes such as flotation and gravity separation. Accurate determination of liberation degree is of great significance for predicting theoretical recovery rate, guiding grinding and classification operations, and reducing energy consumption in mineral processing.

[0003] With the increasing depletion of high-grade, easily beneficiated molybdenum ore resources, complex symbiotic deposits with fine grain size and high oxidation levels have become the main focus of current development and utilization. These ores contain a variety of molybdenum minerals, commonly including molybdenite, molybdenite-calcium molybdenite, and molybdenite-lead molybdenite, with significant differences in crystallization habits. Molybdenite typically exhibits hexagonal platy or scaly crystals, while molybdenite-calcium molybdenite and molybdenite-lead molybdenite are granular, irregular, or equiaxed. This diversity in mineralogical characteristics poses a significant challenge to the accurate determination of the degree of liberation.

[0004] Currently, conventional methods for determining the degree of liberation mainly fall into two categories: First, the area ratio method based on microscopic counting (or particle cross-sectional analysis). This method approximates the two-dimensional cross-sectional area ratio of mineral particles as the three-dimensional volumetric degree of liberation, and is suitable for equiaxed or granular minerals. However, for platy minerals, because they are easily detached along interlayer cleavage planes during grinding, the particles are often in the form of thin plates or strips, and the two-dimensional cross-sectional area ratio will seriously overestimate the actual degree of liberation, leading to distorted measurement results. Second, statistical methods based on automated mineral quantitative analysis systems. Although this type of method can achieve mineral phase identification and quantification, its degree of liberation calculation module is still based on the area ratio or wire cutting method, and similarly, it has not established an independent degree of liberation characterization model for platy minerals. Furthermore, existing methods often employ simple arithmetic averages or area weighting when comprehensively calculating the degree of liberation of multi-scale samples. These methods fail to consider the behavioral differences of different molybdenum phases (such as molybdenum sulfide and molybdenum oxide) in the beneficiation process, and do not utilize multiphase mineral automatic identification data for cross-correction. Consequently, there is a lack of good correlation between the final degree of liberation value and the actual beneficiation recovery effect.

[0005] In view of this, it is necessary to design a method for determining the degree of dissociation of molybdenum ore samples in order to solve the above problems. Summary of the Invention

[0006] In view of the technical problems existing in the background art, this application provides a method for determining the degree of liberation of molybdenum ore samples, aiming to solve the technical problem that the existing methods for determining the degree of liberation do not distinguish mineral crystal habit and do not combine chemical phase correction, resulting in poor correlation between the measurement results and the actual mineral processing and recovery effect.

[0007] This application provides a method for determining the degree of liberation of a molybdenum ore sample, comprising the following steps: S1. The molybdenum ore sample to be tested is sieved into y particle sizes, where 3 ≤ y ≤ 5, and the mass A of each particle size is weighed. n And calculate the yield α of each particle size. n α n =A n / ΣA n Where n represents the particle size number, and n ranges from 1 to y; S2. Samples were taken from each particle size fraction to prepare automated mineralogical analysis samples. Quantitative mineral analysis was performed using an automated mineral analysis system to determine the relative content of each molybdenum mineral in each particle size fraction as b. i.n The relative content of molybdenum minerals in the sample is b. i b i =Σ(α n ×b i.n ); where i represents the molybdenum mineral type number, i ranges from 1 to h, h represents the total number of molybdenum mineral types; n represents the grain size number; S3. Determination of degree of dissociation based on differences in the crystallization habit of molybdenum minerals: For molybdenum minerals with platy crystal habit, the degree of liberation is measured using the exposed edge length ratio method: w particles containing platy molybdenum minerals are selected from each particle size sample, where w ≥ 1000, and the total exposed edge length L of the platy molybdenum minerals in each particle, where they are not connected with other minerals, is measured. p.w.n The length L of the intergrowth interface between platy molybdenum minerals and gangue minerals g.w.n Calculate the ratio of exposed side length L of platy molybdenum minerals in each particle. j.w.n Then L j.w.n =L p.w.n / (L) p.w.n +L g.w.n According to L j.w.n The platy molybdenum mineral particles were classified into three categories: single-unit state, intergrowth state, and enclosed state. The degree of liberation parameter L of platy molybdenum minerals in each particle size fraction was statistically analyzed. j.n and according to the yield α of each particle size n Weighted calculation of the degree of liberation parameter L of platy molybdenum minerals in the whole sample j Then L j =Σ(α n ×L j.n j=1, 2, 3, representing the single-unit state, the intergrowth state, and the encapsulated state, respectively; n represents the particle size number; For molybdenum minerals with a granular crystal habit, the degree of liberation is measured using the area ratio method: v particles containing granular molybdenum minerals are selected from each particle size sample, where v ≥ 1000, and the cross-sectional area S of the granular molybdenum minerals in each particle is measured. p.v.n and the total cross-sectional area S of the particles t.v.nCalculate the area ratio A of granular molybdenum minerals in each particle. j.v.n Then A j.v.n = S p.v.n / S t.v.n According to A j.v.n The granular molybdenum mineral particles were classified into three categories: single-unit state, intergrowth state, and enclosed state. The degree of liberation parameter A of granular molybdenum minerals in each particle size fraction was statistically analyzed. j.n and according to the yield α of each particle size n Weighted calculation of the degree of liberation parameter A of granular molybdenum minerals in the whole sample j Then A j =Σ(α n ×A j.n j=1, 2, 3, representing the single-unit state, the intergrowth state, and the encapsulated state, respectively; n represents the particle size number; S4. Perform molybdenum phase analysis on the molybdenum ore sample to be tested to determine the relative content K of molybdenum sulfide; S5. Calculate the overall degree of dissociation M for each particle size. n : M n = L j.n ×K + A j.n ×(1-K); Calculate the overall degree of dissociation M of the sample: M=Σ(α n ×M n ).

[0008] As a further improvement to this application, in step S3, the criteria for classifying the monomeric state, the intergrowth state, and the encapsulated state are as follows: L j.w.n Or A j.v.n A value greater than or equal to 0.90 indicates a single-unit state, L j.w.n Or A j.v.n A value greater than or equal to 0.10 and less than 0.90 indicates a conjoined state. j.w.n Or A j.v.n A value less than 0.10 indicates that the item is wrapped.

[0009] As a further improvement to this application, in step S3, the degree of liberation parameter L of the platy molybdenum minerals in each particle size fraction is... j.n = (Number of particles belonging to state j / Total number of platy mineral particles) × 100%.

[0010] As a further improvement to this application, in step S3, the degree of liberation parameter A of the granular molybdenum minerals in each particle size fraction is... j.n = (Number of particles belonging to state j / Total number of granular mineral particles) × 100%.

[0011] As a further improvement to this application, in step S4, the relative content of molybdenum sulfide K = k1 / Σk fWhere f is the phase number in the molybdenum phase analysis, and k f denoted as , where is the molybdenum content in phase f, and k1 is the molybdenum content in the sulfide.

[0012] As a further improvement to this application, in step S3, the molybdenum mineral with platy crystal habit includes molybdenite.

[0013] As a further improvement to this application, in step S3, the molybdenum minerals with granular crystal habit include molybdenite and molybdenite.

[0014] The beneficial effects of this application are as follows: This application provides a method for determining the degree of liberation of molybdenum ore samples. By distinguishing between platy and granular molybdenum minerals, the degree of liberation of each particle size is determined using the exposed side length ratio method and the area ratio method, respectively. The relative content of molybdenum sulfide obtained from chemical phase analysis is introduced for correction. Finally, the overall degree of liberation of the sample is calculated by weighting the yield of each particle size. This application uses the exposed side length ratio method and the area ratio method to differentiate molybdenum minerals with different crystallization habits, effectively eliminating the problem of overestimation of liberation degree caused by two-dimensional projection area error in platy molybdenite. Simultaneously, a unified threshold for classifying monomers, intergrowths, and encapsulated minerals is established, making the statistical results of the degree of liberation of minerals with different morphologies comparable. By introducing a chemical phase analysis partition coefficient to correct the automatically identified data, the metrological accuracy of the degree of liberation determination of multiphase molybdenum minerals is improved. Furthermore, a three-dimensional weighted overall degree of liberation model is constructed by combining particle size yield, mineral morphology, and physical properties, ensuring a high degree of matching between the overall degree of liberation of the whole sample and the actual beneficiation recovery effect, providing a reliable evaluation index for optimizing the grinding-flotation process parameters of molybdenum ore.

[0015] This application is the first to achieve differential dissociation degree characterization based on mineral crystallization habit morphology, significantly improving the accuracy of determining the dissociation degree of platy molybdenum minerals. Targeting the platy crystal habit characteristics of molybdenite, a method based on the exposed edge length ratio is proposed. This method uses the proportion of the total exposed length of platy minerals at the grain edge to the total boundary (exposed edge + intergrowth interface) as the dissociation degree index, replacing the traditional area ratio method. This index directly reflects whether the platy minerals are completely surrounded or detached from gangue in three-dimensional space, with clear physical meaning, avoiding the problem of overestimating the dissociation degree due to orientation errors in the two-dimensional projected area of ​​platy particles caused by the area ratio method. A unified classification standard of three categories—monoliths, intergrowths, and encapsulated minerals—is established (thresholds 0.90 and 0.10), applicable to both determination methods, facilitating horizontal comparison and process evaluation. Both the edge length ratio and area ratio use the same classification threshold, making the statistical results of the dissociation degree of platy and granular minerals comparable. This allows mineral processing engineers to uniformly analyze the dissociation state of different morphologies of minerals in each particle size, providing a clear basis for accurately formulating grinding-flotation process parameters.

[0016] This application effectively reduces the systematic bias of the automatic identification system and improves the reliability of the liberation degree data by introducing a chemical phase analysis partition coefficient. It incorporates the actual molybdenum sulfide content measured by the chemical phase method and the chemical phase separation of molybdenum oxide minerals into the liberation degree measurement, ensuring that the final liberation degree result possesses both the metrological accuracy and commonality of multiphase molybdenum mineral liberation degree determination. A multi-size weighted comprehensive liberation degree model is constructed to comprehensively reflect the overall liberation state of the ore. It not only calculates the platy and granular liberation degrees of each size size separately, but also further weights the whole sample liberation degree according to the yield of each size size. When calculating the comprehensive liberation degree of a certain size size, it simultaneously considers the relative content ratio of molybdenite (platy) and other molybdenum minerals (granular) in that size size, as well as the interphase bonding, forming a three-dimensional weighted model of size yield, mineral morphology, and phase bonding. This model overcomes the shortcomings of traditional methods that simply weight or ignore morphological differences, ensuring a high degree of matching between the comprehensive liberation degree of the whole sample and the actual flotation feed properties.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of molybdenite in its monomeric state in Embodiment 1 of this application; Figure 2 This is a schematic diagram of molybdenite in an enclosed state in Embodiment 1 of this application. Detailed Implementation

[0020] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0024] Accurate determination of mineral liberation degree is crucial for optimizing mineral processing technology. However, existing methods do not take into account the differences in crystallization habits of molybdenite minerals. The area ratio method for platy molybdenite is prone to overestimating the degree of liberation. Furthermore, chemical phase analysis is not introduced for correction, and there is a lack of a comprehensive weighted calculation model for different molybdenite minerals in multi-size samples. As a result, the determination results are poorly correlated with the actual mineral processing recovery effect.

[0025] To address the technical problem that existing methods for determining liberation degree fail to differentiate between mineral crystal habits and chemical phase corrections, resulting in poor correlation between the measured results and actual mineral processing recovery, this application provides a method for determining the liberation degree of molybdenum ore samples. This method distinguishes between platy and granular molybdenum minerals, using the exposed side length ratio method and area ratio method respectively to determine the liberation degree. After correction by incorporating the relative content of molybdenum sulfide, the comprehensive liberation degree is calculated by weighting the results according to particle size yield. This achieves the technical effects of eliminating the overestimation of liberation degree for platy minerals, improving the accuracy of multiphase molybdenum mineral determination, and ensuring a high degree of consistency between the measured results and actual mineral processing recovery.

[0026] This application provides a method for determining the degree of dissociation of a molybdenum ore sample, comprising the following steps: S1. The molybdenum ore sample to be tested is sieved into y particle sizes, where 3 ≤ y ≤ 5, and the mass A of each particle size is weighed. n And calculate the yield α of each particle size. n α n =A n / ΣA n Where n represents the particle size number, and n ranges from 1 to y; S2. Samples were taken from each particle size fraction to prepare automated mineralogical analysis samples. Quantitative mineral analysis was performed using an automated mineral analysis system to determine the relative content of each molybdenum mineral in each particle size fraction as b. i.n The relative content of molybdenum minerals in the sample is b. i b i =Σ(α n ×b i.n); where i represents the molybdenum mineral type number, i ranges from 1 to h, h represents the total number of molybdenum mineral types; n represents the grain size number; S3. Determination of degree of dissociation based on differences in the crystallization habit of molybdenum minerals: For molybdenum minerals with platy crystal habit, the degree of liberation is measured using the exposed edge length ratio method: w particles containing platy molybdenum minerals are selected from each particle size sample, where w ≥ 1000, and the total exposed edge length L of the platy molybdenum minerals in each particle, where they are not connected with other minerals, is measured. p.w.n The length L of the intergrowth interface between platy molybdenum minerals and gangue minerals g.w.n Calculate the ratio of exposed side length L of platy molybdenum minerals in each particle. j.w.n Then L j.w.n =L p.w.n / (L) p.w.n +L g.w.n According to L j.w.n The platy molybdenum mineral particles were classified into three categories: single-unit state, intergrowth state, and enclosed state. The degree of liberation parameter L of platy molybdenum minerals in each particle size fraction was statistically analyzed. j.n and according to the yield α of each particle size n Weighted calculation of the degree of liberation parameter L of platy molybdenum minerals in the whole sample j Then L j =Σ(α n ×L j.n j=1, 2, 3, representing the single-unit state, the intergrowth state, and the encapsulated state, respectively; n represents the particle size number; For molybdenum minerals with a granular crystal habit, the degree of liberation is measured using the area ratio method: v particles containing granular molybdenum minerals are selected from each particle size sample, where v ≥ 1000, and the cross-sectional area S of the granular molybdenum minerals in each particle is measured. p.v.n and the total cross-sectional area S of the particles t.v.n Calculate the area ratio A of granular molybdenum minerals in each particle. j.v.n Then A j.v.n = S p.v.n / S t.v.n According to A j.v.n The granular molybdenum mineral particles were classified into three categories: single-unit state, intergrowth state, and enclosed state. The degree of liberation parameter A of granular molybdenum minerals in each particle size fraction was statistically analyzed. j.n and according to the yield α of each particle size n Weighted calculation of the degree of liberation parameter A of granular molybdenum minerals in the whole sample j Then A j =Σ(α n ×A j.n j=1, 2, 3, representing the single-unit state, the intergrowth state, and the encapsulated state, respectively; n represents the particle size number; S4. Perform molybdenum phase analysis on the molybdenum ore sample to be tested to determine the relative content K of molybdenum sulfide; S5. Calculate the overall degree of dissociation M for each particle size. n : M n = L j.n ×K + A j.n ×(1-K); n represents the particle size number; Calculate the overall degree of dissociation M of the sample: M=Σ(α n ×M n ).

[0027] In the technical solution of this application embodiment, the degree of liberation of molybdenum ore samples is determined by the synergistic identification of platy and granular minerals. A unified characterization system for the degree of liberation of platy molybdenum minerals (molybdenite) and granular molybdenum minerals (calcium molybdenum ore, lead molybdenum ore, etc.) is established, providing a more engineering-guided evaluation index for the comprehensive recovery of molybdenum ore.

[0028] Furthermore, in some embodiments, in step S3, the criteria for distinguishing between the monomeric state, the intergrowth state, and the encapsulated state are: L j.w.n Or A j.v.n A value greater than or equal to 0.90 indicates a single-unit state, L j.w.n Or A j.v.n A value greater than or equal to 0.10 and less than 0.90 indicates a conjoined state. j.w.n Or A j.v.n A value less than 0.10 indicates that the item is wrapped.

[0029] In the technical solution of this application embodiment, by setting 0.90 and 0.10 as the dividing thresholds, the side length ratio and area ratio of two types of minerals with different crystallization habits are uniformly incorporated into the same classification system. This not only effectively eliminates the interference of cross-sectional error caused by different particle cutting orientations in single-plane measurement by using an interval range, but also ensures that the degree of liberation data obtained by platy and granular minerals under different methods are comparable and additive. This provides a unified quantitative benchmark for subsequent phase correction and weighted comprehensive calculation, making the overall degree of liberation index of the whole sample more accurately reflect the actual liberation state of various molybdenum minerals in the ore.

[0030] Furthermore, in some embodiments, in step S3, the degree of liberation parameter L of platy molybdenum minerals in each particle size fraction is... j.n = (Number of particles belonging to state j / Total number of platy mineral particles) × 100%; Liberation parameter A of granular molybdenum minerals in each particle size fraction j.n = (Number of particles belonging to state j / Total number of granular mineral particles) × 100%.

[0031] In the technical solution of this application embodiment, the microscopic dissociation determination results of individual particles are statistically summarized by particle size, so that the dissociation degree data of each particle size has statistical significance, providing basic data for subsequent weighted calculation of the overall dissociation degree of the whole sample by yield.

[0032] Furthermore, in some embodiments, in step S4, the relative content of molybdenum sulfide K = k1 / Σk f Where f is the phase number in the molybdenum phase analysis, and k f denoted as , where is the molybdenum content in phase f, and k1 is the molybdenum content in the sulfide.

[0033] In the technical solution of this application embodiment, the advantage of accurate quantitative analysis by chemical phase analysis is utilized to correct the systematic bias that may exist in the automatic mineral analysis system when identifying oxides and sulfides, so that the final comprehensive degree of dissociation data can more accurately reflect the behavioral differences of different molybdenum phases in the actual separation process, thereby improving the reliability of the measurement results.

[0034] Furthermore, in some embodiments, in step S3, the molybdenum minerals with platy crystal habit include molybdenite; the molybdenum minerals with granular crystal habit include molybdenite and molybdenite.

[0035] In the technical solution of this application, molybdenum minerals are classified and measured according to their actual crystallization habits. Molybdenum minerals with platy crystallization habits are mainly molybdenite, requiring the use of the exposed side length ratio method to accurately characterize their degree of liberation. In contrast, molybdenite minerals with granular crystallization habits, such as molybdenite and molybdenite-lead molybdenite, do not have a layered structure; their particle cross-sections are nearly equiaxed or granular, and the area ratio method can better reflect their three-dimensional liberation state. This classification based on mineral type provides a clear scope of application and classification basis for the rationality and feasibility of the differentiated measurement scheme in this application.

[0036] Furthermore, in some embodiments, in step S2, the automated mineral analysis system is a BPMA (Process Mineralogy Analyzer) or MLA (Mineral Parameter Analyzer). The preparation of the automated mineralogy analysis sample includes epoxy resin embedding, grinding, polishing, and carbon spraying. Specifically, the cured and demolded sample is ground using a polishing machine, including coarse grinding, fine grinding, high-precision grinding, and polishing. During preliminary coarse grinding, the surface morphology of the ground sample is observed under an optical microscope; particle exposure needs to reach over 90%. Care is taken to eliminate scratches during polishing. Carbon spraying refers to using a multi-functional coating instrument to spray a 10-30 nm thick layer of carbon to prevent poor conductivity of the sample.

[0037] The following are some specific embodiments. It should be noted that the embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0038] Example 1 This embodiment provides a method for determining the degree of liberation of a molybdenum ore sample. The sample to be tested is a porphyry molybdenum ore, and the method includes the following steps: S1. A total of 6.00 kg of molybdenum ore samples were sieved using a standard sieve and the samples were divided into 4 particle sizes. The mass and yield of each particle size are shown in Table 1. Table 1. Mass and Yield of Each Particle Size Example of yield calculation: α1 = 1774.22 / 6000.00 × 100% = 29.57%; S2. Take 5.00 g of each particle size sample to prepare an automated mineralogical analysis sample. Perform quantitative mineral analysis using an automated mineral analysis system (FEI MLA650). Set the BSE image resolution to 0.35 μm / pixel. Collect no less than 15,000 mineral particles per particle size. The relative contents of the main molybdenum minerals in each particle size are shown in Table 2. Table 2. Relative content of molybdenum minerals in each particle size fraction (b) i.n (%) Example calculations are as follows: molybdenite b1=Σα n ×b 1.n =29.57%×4.28%+32.09%×5.63%+25.54%×6.97%+12.80%×7.46% =5.81%; S3. Determination of degree of dissociation based on differences in the crystallization habit of molybdenum minerals: For molybdenum minerals with platy crystal habit, the degree of liberation is measured using the exposed edge length ratio method: At least 1200 particles containing platy molybdenum minerals are selected from each particle size sample, and the total exposed edge length L of the platy molybdenum minerals in each particle, where they are not connected to other minerals, is measured. p.w.n The length L of the intergrowth interface between platy molybdenum minerals and gangue minerals g.w.n Calculate the ratio of exposed side length L of platy molybdenum minerals in each particle. j.w.n Then L j.w.n =L p.w.n / (L) p.w.n +L g.w.n The molybdenum minerals were classified and statistically analyzed according to their state as single organisms (≥0.90), intergrowths (0.10~0.90), and encapsulated (<0.10), and the degree of liberation parameter L of the platy molybdenum minerals in the whole sample was calculated. j The results are shown in Table 3; Table 3. Liberation parameters L for molybdenite of different particle sizes j.n (%) Example calculations are as follows: L1=Σ(α n ×L 1.n = 29.57% × 72.37% + 32.09% × 81.84% + 25.54% × 83.52% + 12.80% × 91.26% = 80.67%; For molybdenum minerals with granular crystal habit, the degree of liberation is measured using the area ratio method: at least 1100 particles containing granular molybdenum minerals are selected from each particle size sample, and the cross-sectional area S of the granular molybdenum minerals in each particle is measured. p.v.n and the total cross-sectional area S of the particles t.v.n Calculate the area ratio A of granular molybdenum minerals in each particle. j.v.n Then A j.v.n = S p.v.n / S t.v.n The results of the statistical analysis, categorized according to the same criteria, are shown in Tables 4 and 5. Table 4. Liberation parameters of molybdenum minerals of various particle sizes (calcium molybdenum ore, lead molybdenum ore, and others) A j.n (%) Table 5. Liberation parameters of granular molybdenum minerals (calcium molybdenum ore, lead molybdenum ore, and others) in whole samples A j (%) Example calculations are as follows: A1=Σ(α n ×A 1.n = 29.57% × 68.62% + 32.09% × 77.93% + 25.54% × 79.84% + 12.80% × 78.75% = 75.77%; S4. Molybdenum phase analysis was performed on the molybdenum ore sample to be tested. The molybdenum content in each phase is shown in Table 6. Table 6. Molybdenum phase analysis results Therefore, K = 0.7975; S5. Calculate the degree of dissociation of each particle size and the overall degree of dissociation of the sample, see Table 7 for details; Table 7. Comprehensive Liberation Degree Analysis of Molybdenum Ore (%) Example calculations are as follows: M1= L j.1 ×K + A j.1 ×(1-K)=72.37%×0.7975+73.86%× (1-0.7975)=72.67%; A j.1 =Σ(bi ×A j.n ) / Σb i = (68.62% × 0.79% + 84.43% × 0.40% + 72.89% × 0.09%) / 1.28% = 73.86%; M=Σ(α n ×M n =29.57%×72.67%+32.09%×81.39%+25.54%×82.90%+12.80%×89.30%=80.21%.

[0039] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A method for determining the degree of liberation of a molybdenum ore sample, characterized in that, Includes the following steps: S1. The molybdenum ore sample to be tested is sieved into y particle sizes, where 3 ≤ y ≤ 5, and the mass A of each particle size is weighed. n And calculate the yield α of each particle size. n α n =A n / ΣA n Where n represents the particle size number, and n ranges from 1 to y; S2. Samples were taken from each particle size fraction to prepare automated mineralogical analysis samples. Quantitative mineral analysis was performed using an automated mineral analysis system to determine the relative content of each molybdenum mineral in each particle size fraction as b. i.n The relative content of molybdenum minerals in the sample is b. i b i =Σ(α n ×b i.n ); where i represents the molybdenum mineral type number, i ranges from 1 to h, h represents the total number of molybdenum mineral types; n represents the grain size number; S3. Determination of degree of dissociation based on differences in the crystallization habit of molybdenum minerals: For molybdenum minerals with platy crystal habit, the degree of liberation is measured using the exposed edge length ratio method: w particles containing platy molybdenum minerals are selected from each particle size sample, where w ≥ 1000, and the total exposed edge length L of the platy molybdenum minerals in each particle, where they are not connected with other minerals, is measured. p.w.n The length L of the intergrowth interface between platy molybdenum minerals and gangue minerals g.w.n Calculate the ratio of exposed side length L of platy molybdenum minerals in each particle. j.w.n Then L j.w.n =L p.w.n / (L) p.w.n +L g.w.n According to L j.w.n The platy molybdenum mineral particles were classified into three categories: single-unit state, intergrowth state, and enclosed state. The degree of liberation parameter L of platy molybdenum minerals in each particle size fraction was statistically analyzed. j.n and according to the yield α of each particle size n Weighted calculation of the degree of liberation parameter L of platy molybdenum minerals in the whole sample j Then L j =Σ(α n ×L j.n j=1, 2, 3, representing the single-unit state, the intergrowth state, and the encapsulated state, respectively; n represents the particle size number; For molybdenum minerals with a granular crystal habit, the degree of liberation is measured using the area ratio method: v particles containing granular molybdenum minerals are selected from each particle size sample, where v ≥ 1000, and the cross-sectional area S of the granular molybdenum minerals in each particle is measured. p.v.n and the total cross-sectional area S of the particles t.v.n Calculate the area ratio A of granular molybdenum minerals in each particle. j.v.n Then A j.v.n = S p.v.n / S t.v.n According to A j.v.n The granular molybdenum mineral particles were classified into three categories: single-unit state, intergrowth state, and enclosed state. The degree of liberation parameter A of granular molybdenum minerals in each particle size fraction was statistically analyzed. j.n and according to the yield α of each particle size n Weighted calculation of the degree of liberation parameter A of granular molybdenum minerals in the whole sample j Then A j =Σ(α n ×A j.n j=1, 2, 3, representing the single-unit state, the intergrowth state, and the encapsulated state, respectively; n represents the particle size number; S4. Perform molybdenum phase analysis on the molybdenum ore sample to be tested to determine the relative content K of molybdenum sulfide; S5. Calculate the overall degree of dissociation M for each particle size. n : M n = L j.n ×K + A j.n ×(1-K); Calculate the overall degree of dissociation M of the sample: M=Σ(a n ×M n )。 2. The method for determining the degree of liberation of molybdenum ore samples according to claim 1, characterized in that, In step S3, the criteria for classifying the monomeric state, the intergrowth state, and the encapsulated state are: L j.w.n Or A j.v.n A value greater than or equal to 0.90 indicates a single-unit state, L j.w.n Or A j.v.n A value greater than or equal to 0.10 and less than 0.90 indicates a conjoined state. j.w.n Or A j.v.n A value less than 0.10 indicates that the item is wrapped.

3. The method for determining the degree of liberation of molybdenum ore samples according to claim 1, characterized in that, In step S3, the degree of liberation parameter L of the platy molybdenum minerals in each particle size fraction is... j.n = (Number of particles belonging to state j / Total number of platy mineral particles) × 100%.

4. The method for determining the degree of liberation of a molybdenum ore sample according to claim 1, characterized in that, In step S3, the degree of liberation parameter A of the granular molybdenum minerals in each particle size fraction is... j.n = (Number of particles belonging to state j / Total number of granular mineral particles) × 100%.

5. The method for determining the degree of liberation of a molybdenum ore sample according to claim 1, characterized in that, In step S4, the relative content of molybdenum sulfide is K = k1 / Σk f Where f is the phase number in the molybdenum phase analysis, and k f denoted as , where is the molybdenum content in phase f, and k1 is the molybdenum content in the sulfide.

6. The method for determining the degree of liberation of a molybdenum ore sample according to claim 1, characterized in that, In step S3, the molybdenum mineral with platy crystal habit includes molybdenite.

7. The method for determining the degree of liberation of a molybdenum ore sample according to claim 1, characterized in that, In step S3, the molybdenum minerals with granular crystal habit include molybdenite and molybdenite.

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