Enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore

Abstract

This invention provides an enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore. The method employs a beneficiation process of "rapid flotation – synergistic roughing – enhanced scavenging – coarse-grained intergrowth regrinding – asynchronous cleaning – copper-molybdenum separation." Based on a stepwise configuration of "collector-inhibitor," it enhances the flotation of target minerals and inhibits the flotation of Ca and Mg gangues. It achieves efficient recovery of copper and molybdenum minerals with significant differences in floatability and particle size distribution through stepwise diversion, yielding copper and molybdenum concentrate products. This method improves the flotation efficiency and beneficiation indicators of copper and molybdenum, solving the problem of efficient recovery from marble-skarn-porphyry mixed copper-molybdenum ore.

Description

Technical Field

[0001] This invention belongs to the field of flotation and recovery technology of mixed copper-molybdenum ore, specifically relating to an enhanced flotation and recovery method for mixed marble-skarn-porphyry copper-molybdenum ore. Background Technology

[0002] Marble-skarn-porphyry mixed copper-molybdenum deposits are commonly found in high-altitude and cold regions and are important sources of strategic metals such as copper, molybdenum, gold, and silver. Their ore properties have three lithological characteristics: (1) Copper minerals are mainly copper sulfides, but there are many types. Secondary copper sulfides (bornite, chalcocite, covellite, and chalcopyrite) account for a high proportion. Copper minerals are distributed in the ore in fine-grained disseminated or massive and banded structures. The floatability and large range of the particle size distribution of copper minerals are not conducive to mineralization. (1) Liberation and beneficiation enrichment; (2) Molybdenum is mainly molybdenite, but the grade is low and the particle size is medium and fine, making recovery difficult; (3) Gangue composition is complex, with calcite-dolomite, garnet, pyroxene-diopside, quartz, and plagioclase as the main components, and a small amount of mica, chlorite, talc, pyrite, magnetite, etc. The gangue contains a lot of Ca and Mg, and after grinding, a large amount of active fine mud is produced, and a large amount of metal "inevitable ions" are released, which greatly interferes with the copper-molybdenum flotation process. In summary, the recovery of this type of copper-molybdenum resource generally suffers from low efficiency, poor effect and high production cost.

[0003] Currently, the flotation principle and process for this type of copper-molybdenum resource is mainly "copper-molybdenum mixed flotation-copper-molybdenum separation". The process structure of "copper-molybdenum mixed flotation" is further divided into three categories: "rapid flotation", "equal floatability", and "mixed flotation", with "mixed flotation" being the most common. The first two schemes require the addition of highly selective collectors, which can easily cause intergrowths or minerals with poor floatability to be effectively floated. The third scheme requires the addition of a large amount of collector at once, which can easily entrain highly active Ca and Mg gangue, resulting in sticky flotation foam, large middlings circulation volume, and hindering metal floatation, thus reducing metal grade and recovery rate.

[0004] Some researchers have adopted a "rapid flotation-enhanced flotation" scheme, adding collectors of different intensities in stages to achieve the tiered recovery of copper and molybdenum minerals with large differences in floatability. However, this approach has not fully considered the differences in mineral particle size and the interference of Ca and Mg in flotation. Furthermore, it lacks a reasonable consideration of the treatment method for the concentrate products from the tiered flotation. Therefore, it is not entirely applicable to the flotation recovery of copper and molybdenum ores with mixed lithologies.

[0005] Therefore, based on the mineral floatability, differences in particle size distribution, and the interference patterns of Ca and Mg gangue, it is necessary to develop simpler and more efficient mineral processing flow structures and mineral processing reagent systems to specifically enhance the utilization rate and efficiency of such complex copper-molybdenum resources. Summary of the Invention

[0006] In view of this, the present invention targets marble-skarn-porphyry mixed copper-molybdenum deposits and adopts a process of "rapid flotation-cooperative roughing-enhanced scavenging-coarse intergrowth regrinding-asynchronous cleaning-copper-molybdenum separation beneficiation" and "enhanced suppression of Ca and Mg silicate and carbonate gangues" to achieve step-by-step diversion and efficient recovery of copper and molybdenum minerals with large differences in floatability and particle size distribution, and disperses and controls the flotation of Ca and Mg gangues to reduce their interference with the copper and molybdenum flotation enrichment process, thereby improving the efficiency of copper and molybdenum flotation and beneficiation indicators.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A method for enhanced flotation recovery of marble-skarn-porphyry mixed copper-molybdenum ore, the enhanced flotation recovery method comprising the following steps: S1. The marble-skarn-porphyry mixed copper-molybdenum ore is crushed and ground, with the grinding fineness controlled at 50%~65% to -0.074mm, and water is added to adjust the slurry concentration to 33%~35% to obtain the raw ore slurry. S2. Add copper-molybdenum collector and frother to the raw ore slurry for rapid flotation to obtain rapid flotation concentrate and rapid flotation tailings; S3. Add copper-molybdenum collector to the rapid flotation tailings for roughing to obtain roughing concentrate and roughing tailings; S4. Add gangue inhibitor, copper collector and frother to roughing tailings for scavenging to obtain scavenging concentrate and scavenging tailings. S5. Take the scavenging concentrate and regrind it, controlling the regrinding fineness to be -0.037mm to account for 75%~90%, add gangue inhibitor for pre-selection, and obtain pre-selected concentrate and pre-selected tailings; S6. Add copper-molybdenum collector to the pre-cleaned concentrate for closed-circuit pre-cleaning and scavenging; wherein, the pre-cleaned concentrate is returned to the regrinding operation in step S5, and the pre-cleaned tailings are returned to the scavenging operation in step S4. S7. Combine the pre-selected concentrate from step S5 with the rougher concentrate from step S3, add gangue inhibitor for selection I, and obtain selection I concentrate and selection I tailings; wherein, selection I tailings are returned to the regrinding operation in step S5. S8. Combine the concentrate from step S2 with the fast flotation concentrate from step S2, add gangue inhibitor and perform finer II to obtain copper-molybdenum mixed concentrate and finer II tailings. S9. The copper-molybdenum mixed concentrate is concentrated, de-treated, and then copper inhibitor is added for copper-molybdenum separation flotation to obtain copper concentrate and molybdenum concentrate.

[0008] Furthermore, in step S2, the copper-molybdenum collector is composed of ethyl thiocyanate and kerosene; The copper-molybdenum collectors in steps S3 and S6 are the same, both consisting of ethyl thiocyanate and ethyl thiocyanate.

[0009] Furthermore, in step S2, the amount of copper-molybdenum collector added is 4.5~5.5 g / t of ethyl thiocyanate and 9~11 g / t of kerosene; In step S3, the amount of copper-molybdenum collector added is 4.5~5.5 g / t of ethyl thiocyanate and 9~11 g / t of ethyl thiocyanate. In step S6, the amount of copper-molybdenum collector added is 1.5~2.5 g / t of ethyl thiocyanate and 4~6 g / t of ethyl thiocyanate.

[0010] Furthermore, the foaming agent in step S2 is methyl isobutyl methanol, and the dosage is 15~25g / t; In step S4, the heating foaming agent is pine oil, and the dosage is 8~12g / t.

[0011] Furthermore, the gangue inhibitors in steps S4, S5, S7, and S8 are all CD-T1, which is made from sodium hexametaphosphate, sodium citrate, and carboxymethyl cellulose in a mass percentage ratio of (10%~30%):(40%~60%):(30%~40%). In step S4, the amount of CD-T1 added is 45~55 g / t; In step S5, the amount of CD-T1 added is 25~35 g / t; In step S7, the amount of CD-T1 added is 15~25 g / t; In step S8, the amount of CD-T1 added is 8~12 g / t.

[0012] Furthermore, in step S4, the copper collector is pentyl potassium xanthate, and the dosage is 13~17 g / t. Furthermore, in step S9, the drug removal is carried out by adding activated carbon or by wiping. The copper inhibitor is at least one of sodium sulfide, sodium hydrosulfide, and sodium mercaptoacetate.

[0013] Furthermore, in step S9, the amount of activated carbon used during detoxification is 100-200 g / t; In the copper-molybdenum separation flotation process, the dosage of sodium sulfide or sodium hydrosulfide is 1000~20000 g / t and 1000~10000 g / t, respectively; when sodium mercaptoacetate is used as an auxiliary inhibitor for copper, its dosage is 200~500 g / t. The copper-molybdenum separation flotation process consists of one roughing process followed by 5 to 8 fine selection processes and then 2 to 4 scavenging processes.

[0014] Furthermore, in step S1, the marble-skarn-porphyry mixed copper-molybdenum ore is crushed to -2mm and ground using a conical ball mill.

[0015] The above method is applied to the recovery of copper and molybdenum resources in marble-skarn-porphyry mixed copper-molybdenum deposits.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Based on the differences in floatability and particle size distribution of copper and molybdenum minerals in marble-skarn-porphyry mixed copper-molybdenum deposits, as well as the interference of a large amount of Ca and Mg silicates and carbonate gangues on the copper and molybdenum flotation process, this invention prioritizes the rapid flotation of copper and molybdenum minerals with good floatability and sufficient liberation, then recovers copper and molybdenum minerals with moderate floatability and basic liberation, and then intensifies the flotation of copper and molybdenum minerals with poor floatability and ineffective liberation. The rapid flotation concentrate, rougher concentrate, and scavenger concentrate are then subjected to asynchronous stepwise refining to ensure effective separation of minerals with different floatability and particle size differences and reduce mutual interference. At the same time, the scavenger concentrate is re-ground as necessary to further liberate coarse intergrowths and achieve maximum flotation recovery of minerals. Finally, through copper-molybdenum separation, the final copper concentrate and molybdenum concentrate are obtained respectively. The new beneficiation process effectively solves the problem of mutual interference during the flotation of copper and molybdenum minerals with large differences in floatability and particle size distribution. It avoids the inefficiency of conventional mixed flotation processes that rely on a "one-size-fits-all" approach, and achieves the technical advantage of a highly targeted combination of "process + reagents" (copper concentrate yield reaches 1.59%, Cu grade reaches 32.33%, and Cu recovery rate reaches 90.43%; molybdenum concentrate yield reaches 0.023%, Mo grade reaches 48.12%, and Mo recovery rate reaches 70.19%), ensuring the rapid and efficient recovery of copper and molybdenum from mixed copper-molybdenum ores.

[0017] (2) In the rapid flotation, roughing and scavenging stages, the present invention adopts a collector scheme with successively decreasing selectivity and successively increasing collectivity. In the rapid flotation and roughing stages, it achieves rapid and sufficient recovery of copper and molybdenum minerals with good and moderate floatability and sufficient and basically liberated particle size. In the scavenging stage, it strengthens the collecting ability of the collector and uses CD-T1 high-efficiency Ca and Mg silicate and carbonate gangue inhibitor. While strengthening the flotation of copper and molybdenum minerals with poor floatability and coarse intergrowth, it reduces the interference of Ca and Mg gangue on the flotation process, and achieves efficient separation and sorting of copper, molybdenum and gangue.

[0018] (3) The present invention recovers copper and molybdenum minerals in a stepwise and diverted manner, effectively suppresses gangue containing Ca and Mg, and rationally sets up a coarse-grained intergrowth regrinding process and an asynchronous beneficiation scheme. The process is highly efficient, the reagents are scientifically and rationally used, and the copper and molybdenum are fully enriched. The process is highly adaptable and stable.

[0019] (4) This invention effectively solves the problem of efficient recovery of marble-skarn-porphyry mixed copper-molybdenum ore. The process is advanced, simple and reliable, and the reagent system is highly targeted, providing a new technical solution for the recovery of similar complex copper-molybdenum resources. Attached Figure Description

[0020] Figure 1 This is a process flow diagram of the enhanced flotation recovery method provided in Embodiment 1 of the present invention. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments, so that those skilled in the art can more clearly understand the present invention. Unless otherwise specified, the technical means used in the following embodiments are all conventional means well known to those skilled in the art, and all reagents and consumables are commercially available products.

[0022] Example 1 This embodiment provides an enhanced flotation recovery method for a marble-skarn-porphyry mixed copper-molybdenum ore. The basic properties of the marble-skarn-porphyry mixed copper-molybdenum ore are as follows: Cu grade 0.5%–1% (mainly chalcopyrite, bornite, and chalcocite, with bornite accounting for ≥30%), Mo grade 0.01%–0.02% (mainly molybdenite); the raw ore contains 15%–20% calcite-dolomite, 20%–25% garnet, 5%–15% pyroxene-diopside, 5%–30% quartz, 10%–30% plagioclase, 3%–10% mica, 1%–3% talc, 2%–5% chlorite, and ≤1% pyrite.

[0023] The specific process is as follows (see process flow diagram). Figure 1 ): (1) The raw ore is crushed to -2mm, and then the crushed ore is ground using a Φ240×90mm conical ball mill. The grinding fineness is controlled to be -0.074mm accounting for 50% to 65%. Water is added to the grinding product to the slurry concentration to 33% to 35% to obtain the raw ore slurry.

[0024] (2) Add copper-molybdenum collector (5g / t of ethyl thiocyanate + 10g / t of kerosene) and frother MIBC (20g / t of methyl isobutyl methanol) to the raw ore slurry and carry out rapid flotation to obtain rapid flotation concentrate and rapid flotation tailings.

[0025] (3) For the rapid flotation tailings described in step (2), add copper-molybdenum collector (5g / t of ethyl thiocyanate + 10g / t of ethyl thiocyanate) to carry out roughing to obtain roughing concentrate and roughing tailings.

[0026] (4) For the rough tailings described in step (3), gangue inhibitor (CD-T1 50g / t, CD-T1 is a mixture of sodium hexametaphosphate, sodium citrate and carboxymethyl cellulose in a mass percentage of 20%:50%:30%), copper collector (pentyl potassium xanthate 15g / t) and frother (pine oil 10g / t) are added in sequence to carry out scavenging to obtain scavenged concentrate and scavenged tailings. The scavenged tailings are the final tailings.

[0027] (5) For the scavenged concentrate described in step (4), regrinding is performed, and the regrinding fineness of -0.037mm accounts for 75% to 90%; after regrinding, gangue inhibitor (CD-T1 30g / t, CD-T1 composition is the same as in step (4)) is added for pre-selection to obtain pre-selected concentrate and pre-selected tailings.

[0028] (6) For the pre-selected tailings described in step (5), add copper-molybdenum collector (2g / t of ethyl thiocyanate + 5g / t of ethyl thiocyanate) and perform one closed-circuit pre-selection. The concentrate (mid-minerals) from the pre-selection is returned to the regrinding operation, and the tailings (mid-minerals) from the pre-selection are returned to the scavenging operation.

[0029] (7) The pre-selected concentrate described in step (5) is combined with the rough concentrate described in step (3), and gangue inhibitor (CD-T1 20g / t, CD-T1 composition is the same as in step (4)) is added to perform selection 1 to obtain selection 1 concentrate and selection 1 tailings (medium ore). Selection 1 tailings (medium ore) are returned to the regrinding operation.

[0030] (8) For the concentrate of the first selection in step (7), combine it with the fast flotation concentrate in step (2), add gangue inhibitor (CD-T1 10g / t, CD-T1 composition is the same as in step (4)) to perform the second selection to obtain copper-molybdenum mixed concentrate, and return the tailings (mid-minerals) of the second selection to the first selection operation.

[0031] (9) For the copper-molybdenum mixed concentrate described in step (8), after concentration and addition of activated carbon (150 g / t) for de-drug treatment, sodium sulfide (5000 g / t) is used as a copper inhibitor for copper-molybdenum separation flotation to obtain copper concentrate and molybdenum concentrate.

[0032] Furthermore, in order to ensure the effectiveness of the process technology in this application, the performance of the final product was also tested, and the specific results are shown in Table 1.

[0033] Table 1. Details of performance indicators after enhanced flotation recovery process. Comparative Example 1 This comparative example uses a conventional "copper-molybdenum co-flotation-copper-molybdenum separation" flotation process, with the specific steps as follows: For the raw ore slurry after grinding, 300g / t of lime as a modifier, 10g / t of butyl xanthate and 10g / t of kerosene as copper-molybdenum collectors, and 20g / t of pine oil as a frother are added to float copper and molybdenum together. After being selected and enriched, a mixed copper-molybdenum concentrate is obtained. The mixed concentrate is then concentrated and detreated with activated carbon (150g / t). Sodium sulfide (5000g / t) is used as a copper depressant for copper-molybdenum separation flotation to obtain the final copper concentrate and molybdenum concentrate.

[0034] Similarly, the performance of the product after flotation was tested, and the specific results are shown in Table 2.

[0035] Table 2. Performance Indicators After Flotation Recovery Process Comparative Example 2 This comparative example uses a flotation process of "rapid flotation-enhanced flotation-copper-molybdenum separation", and the specific steps are as follows: For the raw ore slurry after grinding, a copper-molybdenum collector with high selectivity, the same as in Example 1, is added to rapidly float and recover copper and molybdenum with good floatability. Then, for the rapidly floated tailings, a copper-molybdenum collector with strong collecting ability, the same as in Example 1, is added to enhance the recovery of the remaining copper and molybdenum with poor floatability. The rapidly floated rough concentrate and the enhanced flotation rough concentrate are combined and finely treated to obtain a copper-molybdenum mixed concentrate. Finally, the mixed concentrate is concentrated, de-treated with activated carbon (150 g / t), and copper-molybdenum separation flotation is performed using sodium sulfide (5000 g / t) as a copper depressant to obtain the final copper concentrate and molybdenum concentrate.

[0036] Similarly, the performance of the product after flotation was tested, and the specific results are shown in Table 3.

[0037] Table 3. Performance Indicators After Flotation Recovery Process Comparative Example 3 This comparative example provides a flotation process, the specific steps of which are basically the same as those in Example 1. The difference is that the gangue inhibitor CD-T1 was not added in steps (4), (5), (7) and (8), while the rest remained unchanged. The final experimental data are shown in Table 4.

[0038] Table 4. Performance Indicators After Flotation Recovery Process Comparative Example 4 This comparative example provides a flotation process, the specific steps of which are basically the same as those in Example 1. The difference is that: in step (5), no regrinding is performed, and in steps (6) and (7), the process is no longer returned to the regrinding operation, but is directly returned to the pre-selection operation. The rest remains unchanged. The final experimental data are shown in Table 5.

[0039] Table 5. Performance Indicators After Flotation Recovery Process The data in Tables 1-5 show that the specific process and reagents used in this application yielded higher copper and molybdenum grades and recovery rates, which better meet the industrial requirements for high yields.

[0040] This invention proposes a method for enhanced flotation recovery of copper and molybdenum. The invention employs a mineral processing technology of "rapid flotation-coordinated roughing-enhanced scavenging-re-grinding of coarse intergrowths-asynchronous cleaning-copper-molybdenum separation," based on a stepwise configuration of "collector-inhibitor" stages. This enhances the flotation of target minerals and inhibits the flotation of Ca and Mg gangues, achieving efficient recovery of copper and molybdenum minerals with significant differences in floatability and particle size distribution through stepwise diversion. This yields copper and molybdenum concentrate products, improving the flotation efficiency and beneficiation indicators of copper and molybdenum, and solving the problem of efficient recovery from marble-skarn-porphyry mixed copper-molybdenum ores.

[0041] Unless otherwise specified, all raw materials used in this invention are existing substances that can be purchased directly from the market.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for enhanced flotation recovery of copper-molybdenum ore of marble-skarn-porphyry mixed type, characterized in that, The enhanced flotation recovery method includes the following steps: S1. The marble-skarn-porphyry mixed copper-molybdenum ore is crushed and ground, and the grinding fineness is controlled to be -0.074mm, accounting for 50%~65%. Water is added to adjust the slurry concentration to 33%~35% to obtain the raw ore slurry. S2. Add copper-molybdenum collector and frother to the raw ore slurry for rapid flotation to obtain rapid flotation concentrate and rapid flotation tailings; S3. Add copper-molybdenum collector to the rapid flotation tailings for roughing to obtain roughing concentrate and roughing tailings; S4. Add gangue inhibitor, copper collector and frother to roughing tailings for scavenging to obtain scavenging concentrate and scavenging tailings. S5. Take the scavenging concentrate and regrind it, controlling the regrinding fineness to be -0.037mm to account for 75%~90%, add gangue inhibitor for pre-selection, and obtain pre-selected concentrate and pre-selected tailings; S6. Add copper-molybdenum collector to the pre-cleaned concentrate for closed-circuit pre-cleaning and scavenging; wherein, the pre-cleaned concentrate is returned to the regrinding operation in step S5, and the pre-cleaned tailings are returned to the scavenging operation in step S4. S7. Combine the pre-selected concentrate from step S5 with the rougher concentrate from step S3, add gangue inhibitor for selection I, and obtain selection I concentrate and selection I tailings; wherein, selection I tailings are returned to the regrinding operation in step S5. S8. Combine the concentrate from step S2 with the fast flotation concentrate from step S2, add gangue inhibitor and perform finer II to obtain copper-molybdenum mixed concentrate and finer II tailings. S9. The copper-molybdenum mixed concentrate is concentrated, de-treated, and then copper inhibitor is added for copper-molybdenum separation flotation to obtain copper concentrate and molybdenum concentrate.

2. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 1, characterized in that, In step S2, the copper-molybdenum collector consists of ethyl thiocyanate and kerosene. The copper-molybdenum collectors in steps S3 and S6 are the same, both consisting of ethyl thiocyanate and ethyl thiocyanate.

3. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 2, characterized in that, In step S2, the amount of copper-molybdenum collector added is 4.5~5.5 g / t of ethyl thiocyanate and 9~11 g / t of kerosene. In step S3, the amount of copper-molybdenum collector added is 4.5~5.5 g / t of ethyl thiocyanate and 9~11 g / t of ethyl thiocyanate. In step S6, the amount of copper-molybdenum collector added is 1.5~2.5 g / t of ethyl thiocyanate and 4~6 g / t of ethyl thiocyanate.

4. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 1, characterized in that, The foaming agent in step S2 is methyl isobutyl methanol, and the dosage is 15~25g / t; In step S4, the heating foaming agent is pine oil, and the dosage is 8~12g / t.

5. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 1, characterized in that, The gangue inhibitors in steps S4, S5, S7, and S8 are all CD-T1, which is made from sodium hexametaphosphate, sodium citrate, and carboxymethyl cellulose in a mass percentage ratio of (10%~30%):(40%~60%):(30%~40%). In step S4, the amount of CD-T1 added is 45~55g / t; In step S5, the amount of CD-T1 added is 25~35g / t; In step S7, the amount of CD-T1 added is 15~25g / t; In step S8, the amount of CD-T1 added is 8~12g / t.

6. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 1, characterized in that, In step S4, the copper collector is pentyl potassium xanthate, and the dosage is 13~17 g / t.

7. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 1, characterized in that, In step S9, detoxification is carried out by adding activated carbon or by wiping. The copper inhibitor is at least one of sodium sulfide, sodium hydrosulfide, and sodium mercaptoacetate.

8. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 7, characterized in that, In step S9, the amount of activated carbon used during de-drug removal is 100-200 g / t; In the copper-molybdenum separation flotation process, the dosage of sodium sulfide or sodium hydrosulfide is 1000~20000 g / t and 1000~10000 g / t, respectively; when sodium mercaptoacetate is used as an auxiliary inhibitor for copper, its dosage is 100~500 g / t. The copper-molybdenum separation flotation process consists of one roughing process followed by 5 to 8 fine selection processes and then 2 to 4 scavenging processes.

9. The enhanced flotation recovery method for marble-skarn-porphyry mixed copper-molybdenum ore according to claim 1, characterized in that, In step S1, the marble-skarn-porphyry mixed copper-molybdenum ore is crushed to -2mm and then ground using a conical ball mill.

10. The application of the method according to any one of claims 1-9 in the recovery of copper and molybdenum resources in marble-skarn-porphyry mixed copper-molybdenum deposits.

Images