A beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content.

Abstract

This invention discloses a beneficiation method for complex altered copper-molybdenum ore with high sulfur, iron, talc, and zinc content. Before grinding, harmful metal ions are removed from the raw ore to weaken the floatability of sphalerite and pyrite. The pretreated slurry rapidly floats out talc and coarse-grained copper minerals with high degree of liberation, separating the talc to obtain a high-grade coarse-grained copper concentrate. The rapidly floating tailings float out copper, molybdenum, zinc, and sulfur minerals with complex intergrowth characteristics, as well as some floatable individual minerals. An inhibitor is added, and the ore is re-ground to further weaken the floatability of easily floatable sphalerite and pyrite, thereby separating a mixed concentrate of fine-grained copper minerals and molybdenite. The separated tailings are incorporated into the copper-molybdenum scavenging tailings to recover sphalerite, and the fine-grained copper-molybdenum mixed concentrate is incorporated into the coarse-grained copper concentrate for copper-molybdenum separation, yielding copper concentrate and molybdenum concentrate products. This invention achieves the separation and recovery of copper, molybdenum, and zinc by intervening in harmful metal ions in advance and employing staged grinding and staged flotation, thereby progressively enhancing the differences in surface hydrophobicity of the polymetallic minerals.

Description

Technical Field

[0001] This invention belongs to the field of mineral processing technology, specifically relating to a mineral processing method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc content and zinc content. Background Technology

[0002] Copper, molybdenum, zinc, and other metallic mineral resources are widely used in various aspects of human life. Skarn-type deposits are the main source of copper and associated metals, but due to their complex geological mineralization processes and complex mineral characteristics such as high sulfur and iron content, high talc content, and unavoidable metal ions, the flotation separation of polymetallic minerals under specific wall rock alteration characteristics presents a challenge that urgently needs to be addressed.

[0003] In complex altered copper-molybdenum ores, the main copper minerals are chalcopyrite, covellite, and chalcocite; the main zinc mineral is sphalerite; the main molybdenum mineral is molybdenite; other metallic minerals are mainly pyrite and pyrrhotite; and gangue minerals are mainly talc, serpentine, chlorite, actinolite, and kaolinite. The ore is influenced by contact metamorphism, hydrothermal activity, and supergene processes, often bringing Cu from the primary slime. 2+ When unavoidable metal ions enter the slurry, the grinding and mechanical agitation can severely activate sphalerite and pyrite, making them difficult to suppress. Furthermore, talc, due to its natural hydrophobicity resulting from interlayer dissociation, exhibits superior floatability compared to molybdenite, leading to its introduction into the concentrate and impacting quality, making it difficult to obtain molybdenum concentrate. When gangue minerals and polymetallic minerals in the flotation system simultaneously possess similar and strong floatability, forced suppression inevitably results in the loss of the target metal; conversely, severe metal intermingling makes it difficult to guarantee product quality. Moreover, these complex altered ores are mostly distributed in the circum-Pacific region, concentrated in the high-altitude areas of the Andes Mountains. The target minerals generally exhibit uneven distribution, and fine grinding and recovery of the entire mineral under low pressure and low oxygen conditions inevitably increases the product moisture content. Currently, mines process this type of ore in a relatively simple way, mainly focusing on recovering copper minerals. In the raw ore pulp, sphalerite and pyrite are activated by metal ions during the grinding stage, acquiring extremely high floatability. To avoid copper mineral loss due to sphalerite suppression, zinc is often not suppressed or only weakly suppressed during production. When the zinc content in the raw ore increases, the zinc content in the copper concentrate often exceeds the standard, requiring blending to reduce the zinc content in the raw ore to ensure copper concentrate quality. As the floatability of pyrite increases, the amount of calcium oxide inhibitor also increases, causing simultaneous loss of molybdenite. Furthermore, to reduce talc interference, carboxymethyl cellulose is often used to suppress talc, which is also largely suppressed simultaneously. When the talc content in the raw ore increases, intensified talc suppression also leads to copper mineral loss. Traditional production processes are not suitable for the flotation separation of copper, molybdenum, and zinc minerals with complex mineral characteristics such as high sulfur and iron content, high talc content, and high levels of unavoidable metal ions. Therefore, finding a method to solve these technical problems is essential. Summary of the Invention

[0004] The purpose of this invention is to provide a beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content.

[0005] The first objective of this invention is achieved as follows: the beneficiation method for high-sulfur, high-talc, zinc-bearing, complexly altered copper-molybdenum ore includes pretreatment, rapid coarse flotation, talc reverse flotation removal, mixed roughing, mixed cleaning, and post-treatment steps, specifically including:

[0006] A. Pre-processing:

[0007] 1) The high-sulfur, high-talc, zinc-containing complex altered copper-molybdenum ore to be processed is crushed and washed to obtain oversize ore a and undersize slurry b;

[0008] 2) The undersize slurry b is classified by a hydrocyclone to obtain undersize product c and classification overflow slurry d; the classification overflow slurry d is concentrated to obtain thickener underflow e; the thickener overflow water is added with ion pretreatment agent and stirred to pretreat harmful metal ions to obtain deionized water f after harmful metal ion pretreatment.

[0009] 3) Add deionized water f, which has been pretreated with harmful metal ions, to the ore a on the screen and grind it to obtain the ground product g. The ground product g and the undersize product c are combined and classified until the ore fineness is -74μm, accounting for 50%~55%, to obtain the slurry h.

[0010] B. Rapid coarse flotation: After the slurry h is concentrated by a thickener, deionized water f pretreated with harmful metal ions and thickener underflow e are added to adjust the slurry concentration to 30-40%. Then, pyrite inhibitor, zinc inhibitor, highly selective copper collector and frother are added in sequence to perform one roughing and one cleaning process to obtain talc-containing coarse copper concentrate i, roughing tailings j and cleaning tailings k.

[0011] C. Talc removal by reverse flotation: Copper inhibitor and frother are added sequentially to the coarse copper concentrate i containing talc for two reverse flotation cleaning processes to obtain the tailings l of the reverse flotation cleaning process and the froth product m of the second cleaning process, which is the removed talc.

[0012] D. Mixed roughing: Pyrite inhibitor, zinc inhibitor, strong copper-molybdenum collector and frother are added sequentially to the primary tailings j for one roughing and one scavenging to obtain froth product n and scavenged tailings o.

[0013] E. Mixed Selection:

[0014] 1) Combine the foam product n with the selected tailings k, and add pyrite inhibitor, zinc inhibitor and talc inhibitor in sequence for grinding. The grinding fineness is -45µm accounting for 70~75% to obtain slurry p.

[0015] 2) Add pyrite inhibitor, molybdenum collector, zinc inhibitor, talc inhibitor and foaming agent to the slurry p in sequence, and perform three cleaning and one scavenging to obtain foam product q and fine scavenging tailings r; the tailings of cleaning 1 enter the scavenging, the fine scavenging foam is returned to cleaning 1, and the foam of cleaning 3 and cleaning 2 is returned step by step;

[0016] F. Post-processing:

[0017] 1) Combine the tailings l from the reverse flotation and impurity removal process with the foam product q, add copper inhibitor and molybdenum collector in sequence, and perform one roughing and three cleaning processes to obtain molybdenum concentrate and copper concentrate. The cleaning tailings are returned step by step. The foam from the third cleaning process is the molybdenum concentrate product, and the tailings from the roughing process are the copper concentrate product with coarsened particle size distribution.

[0018] 2) Combine the scavenging tailings o with the fine scavenging tailings r, and add pyrite inhibitor, zinc activator, collector and frother in sequence. Perform one roughing, one scavenging and two cleaning processes. The scavenging tailings are the final tailings, and the foam from the second cleaning process is the zinc concentrate product.

[0019] The specific steps are as follows:

[0020] A. Pretreatment of harmful metal ions: The crushed ore is rapidly washed using a cylindrical screen with a mesh size of 5-8 mm. The undersize slurry is then classified by a hydrocyclone, with 50%-55% of the slurry having a particle size of -74 μm. The overflow slurry is then concentrated in a thickener, with an underflow concentration of 45%-55%. The overflow water from the thickener is then stirred in a mixing tank with an ion pretreatment agent. The deionized water, after pretreatment of harmful metal ions, is returned to the grinding and flotation processes.

[0021] B. First stage of grinding and classification: The ore over the cylindrical screen after washing is ground. The water added during grinding is deionized water that has been pretreated to remove harmful metal ions. The ground product and the undersize product from the cylindrical screen are combined and enter the hydrocyclone for classification. The fineness of the classified ore is -74μm, accounting for 50%~55%.

[0022] C. Rapid flotation of coarse particles: After the slurry obtained in step B is concentrated by a thickener, deionized water pretreated with harmful metal ions is added to the underflow of the thickener for slurry conditioning. The slurry concentration is 30%~40%. Pyrite inhibitor, zinc inhibitor, highly selective copper collector and frother are added in sequence for rapid flotation with one roughing and one cleaning.

[0023] D. Talc Removal by Reverse Flotation: The talc-containing coarse copper concentrate obtained in step C is added with copper inhibitor and frother in sequence, and then subjected to two reverse flotation processes for impurity removal and cleaning. The froth product from the second impurity removal and cleaning process is the removed talc.

[0024] E. Mixed roughing of molybdenum with difficult-to-process copper and fine-grained copper: The roughing tailings from step C are sequentially treated with pyrite inhibitor, zinc inhibitor, strong copper-molybdenum collector and frother, and then subjected to one roughing and one scavenging process.

[0025] F. Secondary grinding: The frothy product from the roughing process in step E is combined with the tailings from the fast flotation process in step C. Pyrite inhibitor, zinc inhibitor, and talc inhibitor are added for secondary grinding. The grinding fineness is -45μm, accounting for 70-75%.

[0026] G. Molybdenum mixed with difficult-to-process copper and fine-grained copper for fine-processing: The slurry obtained in step F is sequentially added with a strong copper-molybdenum collector, a molybdenum collector and a frother, and a flotation process of three fine-processing and one fine-scavenging is carried out. The tailings of fine-processing 1 enter the fine-scavenging process, the froth of the fine-scavenging process is returned to fine-processing 1, and the froth of fine-processing 3 and 2 is returned step by step.

[0027] H. Copper-Molybdenum Separation: The tailings from the back flotation and impurity removal process 1 in step D are combined with the froth from the finer flotation process 3 in step G. Copper inhibitors and molybdenum collectors are added sequentially to carry out a flotation process of one roughing and three finening stages. The finer tailings are returned step by step. The froth from the finer flotation process 3 is a molybdenum concentrate product, and the rougher tailings are a copper concentrate product with coarsened particle size distribution.

[0028] I. Zinc Recovery: The tailings from step E (scavenging) and step G (cleaning) are combined, and pyrite inhibitor, zinc activator, collector and frother are added in sequence. The process involves one roughing, one scavenging and two cleaning flotation processes. The scavenging tailings are the final tailings, and the froth from step G is the zinc concentrate product.

[0029] Furthermore, the process conditions for stirring the overflow water of the concentrator in step A are as follows: adding 100-300 g / ton of ion pretreatment agent, stirring speed of 200-300 r / min, and stirring time of 3-5 minutes.

[0030] Furthermore, the process conditions for the coarse rapid flotation roughing in step C are as follows: adding 2000-3000 g / ton of pyrite inhibitor, 1000-1500 g / ton of zinc inhibitor, stirring for 4-6 minutes, 10-15 g / ton of collector, 5-10 g / ton of frother, and stirring for 2-4 minutes; the process conditions for the coarse rapid flotation cleaning are as follows: adding 200-400 g / ton of pyrite inhibitor, 400-600 g / ton of zinc inhibitor, stirring for 4-6 minutes, 5-10 g / ton of collector, and stirring for 2-4 minutes.

[0031] Furthermore, the process conditions for talc reverse flotation removal and refining 1 described in step D are: adding 200-300 g / ton of copper inhibitor, stirring for 4-6 minutes, and adding 5-10 g / ton of frother, stirring for 2-4 minutes; the process conditions for refining 2 are: adding 50-100 g / ton of copper inhibitor, stirring for 4-6 minutes.

[0032] Further, the roughing process conditions described in step E are as follows: adding 500-1000 g / ton of pyrite inhibitor, 600-1200 g / ton of zinc inhibitor, stirring for 4-6 minutes, adding 20-30 g / ton of copper-molybdenum collector, adding 30-50 g / ton of frother, and stirring for 2-4 minutes; the scavenging process conditions are as follows: adding 300-1000 g / ton of pyrite inhibitor, 600-1200 g / ton of zinc inhibitor, stirring for 4-6 minutes, adding 10-20 g / ton of copper-molybdenum collector, adding 10-20 g / ton of frother, and stirring for 2-4 minutes.

[0033] Furthermore, the process conditions described in step F are as follows: 200-400 g / ton of pyrite inhibitor, 300-600 g / ton of zinc inhibitor, and 100-150 g / ton of talc inhibitor are added during the two-stage grinding.

[0034] Further, in step G, the following process involves: Selective beneficiation 1: adding 10-20 g / ton of collector and 10-15 g / ton of frother, stirring for 2-4 minutes; Selective beneficiation 2: adding 200-400 g / ton of pyrite inhibitor, stirring for 4-6 minutes, adding 5-10 g / ton of collector, stirring for 2-4 minutes; Selective beneficiation 3: adding 50-100 g / ton of pyrite inhibitor, stirring for 4-6 minutes; and Fine scavenging process: adding 200-300 g / ton of zinc inhibitor and 50-100 g / ton of talc inhibitor, stirring for 4-6 minutes, adding 5-10 g / ton of collector and 5-10 g / ton of frother, stirring for 2-4 minutes.

[0035] Furthermore, the copper-molybdenum separation roughing process described in step H involves adding 300-400 g / ton of copper inhibitor, stirring for 4-6 minutes, adding 20-30 g / ton of collector, and stirring for 2-4 minutes; the fine selection process 1 involves adding 100-200 g / ton of copper inhibitor, stirring for 4-6 minutes, adding 10-20 g / ton of collector, and stirring for 2-4 minutes; the fine selection process 2 involves adding 50-100 g / ton of copper inhibitor, and stirring for 4-6 minutes; and the fine selection process 3 involves adding 20-50 g / ton of copper inhibitor, and stirring for 4-6 minutes.

[0036] Further, the zinc recovery roughing process described in step I involves adding 600-1200 g / ton of pyrite inhibitor, stirring for 4-6 minutes, adding 100-200 g / ton of zinc activator, stirring for 4-6 minutes, adding 15-25 g / ton of collector, and 10-20 g / ton of frother, stirring for 2-4 minutes; the scavenging process involves adding 5-10 g / ton of collector and 5-10 g / ton of frother, stirring for 2-4 minutes; the cleaning process 1 involves adding 300-400 g / ton of pyrite inhibitor, stirring for 4-6 minutes, adding 2-5 g / ton of collector, and stirring for 2-4 minutes; the cleaning process 2 involves adding 100-200 g / ton of pyrite inhibitor, stirring for 4-6 minutes.

[0037] Furthermore, the pyrite inhibitor mentioned in the above steps is calcium oxide, the zinc inhibitor is a mixture of zinc sulfate and sulfite in a 2:1 ratio, the copper inhibitor is sodium sulfide, and the zinc activator is copper sulfate.

[0038] Furthermore, the ion pretreatment agent mentioned in step A mainly consists of sodium sulfide and calcium oxide, wherein the proportion of sodium sulfide is 70%~80% and the proportion of calcium oxide is 20%~30%.

[0039] Furthermore, the highly selective copper collector mentioned in step C is KF-6.

[0040] Furthermore, the strong copper-molybdenum collector mentioned in steps E and G is PG-2.

[0041] Furthermore, the molybdenum collector mentioned in steps G and H is emulsified kerosene.

[0042] Furthermore, the foaming agent mentioned in steps C, D, E, and G is H2O.

[0043] Furthermore, the talc inhibitor mentioned in step F is HD-6.

[0044] Furthermore, the collector mentioned in step I is butyl xanthate, and the foaming agent is pine oil.

[0045] Furthermore, the main components of KF-6 mentioned in step C are cycloalkyl thiocarbamate, ethylene glycol chlorocarbamate and sodium trialkyl sulfate, wherein cycloalkyl thiocarbamate accounts for 60%-70%, ethylene glycol chlorocarbamate accounts for 20%-30%, and sodium trialkyl sulfate accounts for 10%-20%.

[0046] Furthermore, the main components of PG-2 in steps E and G are ethyl dixanthate, cycloolefin carbamate and sodium amino acid sulfonate, wherein ethyl dixanthate accounts for 40% to 50%, cycloolefin carbamate accounts for 35% to 40%, and sodium amino acid sulfonate accounts for 10% to 25%.

[0047] Furthermore, the H2O mentioned in steps C, D, E and G mainly consists of ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%~80% and polypropylene glycol butyl ether accounts for 20%~30%.

[0048] Furthermore, the main components of HD-6 described in step F are sodium tripolyphosphate and fructan, wherein sodium tripolyphosphate accounts for 30% to 50% and fructan accounts for 50% to 70%.

[0049] Compared with the prior art, the advantages of the present invention are:

[0050] 1. This invention, before grinding, uses a cylindrical screen to wash the ore, removing a large amount of soluble harmful metal ions from the fine-grained slurry of the crushed raw ore. This not only avoids the separation problems caused by the activation of freshly liberated sphalerite and pyrite surfaces by intense contact with a large number of metal ions during lump ore grinding, but also reduces the amount of pyrite and sphalerite inhibitors needed, especially significantly reducing the amount of calcium oxide, which is beneficial for molybdenite recovery. It has significant advantages in the beneficiation of copper ores with high levels of unavoidable harmful metal ions and high levels of pyrite.

[0051] 2. The present invention uses a cylindrical screen for washing, thickening and stirring to pretreat harmful metal ions. The equipment and process are simple and reliable, the water treatment cycle is short, and the treated deionized water can be returned to the grinding and flotation operations in a timely manner.

[0052] 3. This invention employs rapid flotation after coarse grinding, which not only recovers coarse copper minerals with high degree of liberation but also allows a large amount of highly floatable talc to float prematurely. The natural floatability of talc is used to suppress copper and refloat the talc, thus achieving early talc removal. This avoids the loss of fine-grained and difficult-to-react copper minerals caused by suppressing talc in later stages, while simultaneously obtaining a coarse-grained copper concentrate product with a high Cu grade.

[0053] 4. This invention performs a tiered treatment of talc. The talc removed in the front-end operation is the talc with the best floatability. The floatability of the talc entering the back-end operation decreases, making it easier to suppress. The invention uses HD-6, a talc selective inhibitor with a relatively mild inhibitory effect, which avoids the non-selective strong inhibition of traditional carboxymethyl cellulose. This allows for the tiered separation of talc while minimizing the inhibitory effect of the talc inhibitor on molybdenite, which is beneficial for the recovery of molybdenite. This invention is more suitable for mineral characteristics with high talc content and large differences in floatability.

[0054] 5. This invention employs staged grinding, further weakening the floatability of pyrite and sphalerite. This stepwise enhances the differences in surface hydrophobicity among polymetallic minerals, reducing the inter-metallic inclusions. The particle size distribution of the copper concentrate product is regulated, which helps reduce product moisture content and enhances its adaptability to unconventional environments such as high altitudes in complex altered copper mines.

[0055] 6. The copper collector KF-6 used in the rapid flotation of this invention has good selectivity for coarse-grained copper minerals with high monomer liberation, but weaker collection ability for molybdenite. It removes talc while reducing the loss of molybdenite during rapid flotation operations.

[0056] 7. The reagents used in this invention are all conventional flotation reagents, which are environmentally friendly. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the process flow of the present invention. Detailed Implementation

[0058] The present invention will be further described below with reference to embodiments, but this is not intended to limit the present invention in any way. Any modifications or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0059] The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to the present invention includes pretreatment, rapid coarse flotation, talc reverse flotation removal, mixed roughing, mixed cleaning, and post-treatment steps, specifically including:

[0060] A. Pre-processing:

[0061] 1) The high-sulfur, high-talc, zinc-containing complex altered copper-molybdenum ore to be processed is crushed and washed to obtain oversize ore a and undersize slurry b;

[0062] 2) The undersize slurry b is classified by a hydrocyclone to obtain undersize product c and classification overflow slurry d; the classification overflow slurry d is concentrated to obtain thickener underflow e; the thickener overflow water is added with ion pretreatment agent and stirred to pretreat harmful metal ions to obtain deionized water f after harmful metal ion pretreatment.

[0063] 3) Add deionized water f, which has been pretreated with harmful metal ions, to the ore a on the screen and grind it to obtain the ground product g. The ground product g and the undersize product c are combined and classified until the ore fineness is -74μm, accounting for 50%~55%, to obtain the slurry h.

[0064] B. Rapid coarse flotation: After the slurry h is concentrated by a thickener, deionized water f pretreated with harmful metal ions and thickener underflow e are added to adjust the slurry concentration to 30-40%. Then, pyrite inhibitor, zinc inhibitor, highly selective copper collector and frother are added in sequence to perform one roughing and one cleaning process to obtain talc-containing coarse copper concentrate i, roughing tailings j and cleaning tailings k.

[0065] C. Talc removal by reverse flotation: Copper inhibitor and frother are added sequentially to the coarse copper concentrate i containing talc for two reverse flotation cleaning processes to obtain the tailings l of the reverse flotation cleaning process and the froth product m of the second cleaning process, which is the removed talc.

[0066] D. Mixed roughing: Pyrite inhibitor, zinc inhibitor, strong copper-molybdenum collector and frother are added sequentially to the primary tailings j for one roughing and one scavenging to obtain froth product n and scavenged tailings o.

[0067] E. Mixed Selection:

[0068] 1) Combine the foam product n with the selected tailings k, and add pyrite inhibitor, zinc inhibitor and talc inhibitor in sequence for grinding. The grinding fineness is -45µm accounting for 70~75% to obtain slurry p.

[0069] 2) Add pyrite inhibitor, molybdenum collector, zinc inhibitor, talc inhibitor and foaming agent to the slurry p in sequence, and perform three cleaning and one scavenging to obtain foam product q and fine scavenging tailings r; the tailings of cleaning 1 enter the scavenging, the fine scavenging foam is returned to cleaning 1, and the foam of cleaning 3 and cleaning 2 is returned step by step;

[0070] F. Post-processing:

[0071] 1) Combine the tailings l from the reverse flotation and impurity removal process with the foam product q, add copper inhibitor and molybdenum collector in sequence, and perform one roughing and three cleaning processes to obtain molybdenum concentrate and copper concentrate. The cleaning tailings are returned step by step. The foam from the third cleaning process is the molybdenum concentrate product, and the tailings from the roughing process are the copper concentrate product with coarsened particle size distribution.

[0072] 2) Combine the scavenging tailings o with the fine scavenging tailings r, and add pyrite inhibitor, zinc activator, collector and frother in sequence. Perform one roughing, one scavenging and two cleaning processes. The scavenging tailings are the final tailings, and the foam from the second cleaning process is the zinc concentrate product.

[0073] In step 2), the process conditions for adding ion pretreatment agent to the overflow water of the concentrator and stirring are as follows: add 100~300g / t of ion pretreatment agent, stir at a speed of 200~300r / min, and stir for 3~5min.

[0074] The ion pretreatment agent is composed of sodium sulfide and calcium oxide, wherein the mass percentage of sodium sulfide is 70-80% and the mass percentage of calcium oxide is 20-30%.

[0075] The pyrite inhibitor mentioned in step B is calcium oxide; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the highly selective copper collector is KF-6, the main components of which are cycloalkyl thiocarbamate, ethylene glycol chlorocarbamate, and sodium trialkyl sulfate, wherein cycloalkyl thiocarbamate accounts for 60%-70%, ethylene glycol chlorocarbamate accounts for 20%-30%, and sodium trialkyl sulfate accounts for 10%-20%; the foaming agent is H2O, the main components of which are ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%-80% and polypropylene glycol butyl ether accounts for 20%-30%.

[0076] The copper inhibitor mentioned in step C is sodium sulfide; the foaming agent is H2O, the main components of which are ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%~80% and polypropylene glycol butyl ether accounts for 20%~30%.

[0077] The pyrite inhibitor mentioned in step D is calcium oxide; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the strong copper-molybdenum collector is PG-2, the main components of which are ethyl dixanthate, cycloolefin carbamate and sodium amino acid sulfonate, wherein ethyl dixanthate accounts for 40%~50%, cycloolefin carbamate accounts for 35%~40%, and sodium amino acid sulfonate accounts for 10%~25%; the foaming agent is H2O, the main components of which are ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%~80% and polypropylene glycol butyl ether accounts for 20%~30%.

[0078] The pyrite inhibitor mentioned in step 1) is calcium oxide; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the talc inhibitor is HD-6, the main components of which are sodium tripolyphosphate and fructan, wherein sodium tripolyphosphate accounts for 30%~50% and fructan accounts for 50%~70%.

[0079] The pyrite inhibitor mentioned in step 2) is calcium oxide; the molybdenum collector is emulsified kerosene; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the talc inhibitor is HD-6, the main components of which are sodium tripolyphosphate and fructan, wherein sodium tripolyphosphate accounts for 30%~50% and fructan accounts for 50%~70%; the foaming agent is H2O, the main components of which are ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%~80% and polypropylene glycol butyl ether accounts for 20%~30%.

[0080] The copper inhibitor mentioned in step 1) is sodium sulfide; the molybdenum collector is emulsified kerosene.

[0081] The pyrite inhibitor mentioned in step 2) is calcium oxide; the zinc activator is copper sulfate; the collector is butyl xanthate; and the foaming agent is pine oil. The invention will be further illustrated below with specific implementation examples:

[0082] Example 1

[0083] A certain mineral processing plant contains 0.56% copper, 0.017% molybdenum, 0.41% zinc, and 15.32% iron. The main metallic minerals are sulfide minerals (chalcopyrite, covellite, chalcocite, arsenic sulfide, molybdenite, sphalerite, and pyrite). The secondary copper content is high, and the pulp contains a large amount of soluble harmful metal ions. The above mineral sample will be processed through the following steps:

[0084] A. Pretreatment of Harmful Metal Ions: The crushed ore is rapidly washed using a cylindrical screen with a 6mm aperture. The undersize slurry is classified by a hydrocyclone, and the overflow slurry is concentrated in a thickener. The underflow concentration of the thickener is 50%. Sodium sulfide (160g / ton) and calcium oxide (40g / ton) are added to the thickener overflow water and stirred at 300 rpm for 4 minutes. The pretreated deionized water is returned to the grinding and flotation processes.

[0085] B. First stage of grinding and classification: The ore over the cylindrical screen after washing is ground. The water added during grinding is deionized water that has been pretreated to remove harmful metal ions. The ground product and the undersize product of the cylindrical screen are combined and enter the hydrocyclone for classification. The fineness of the classified ore is -74μm, accounting for 55%.

[0086] C. Rapid coarse flotation: After the slurry obtained in step B is concentrated by a thickener, deionized water pretreated with harmful metal ions is added to the thickener underflow for slurry conditioning to a concentration of 35%. Then, 3000 g / ton of calcium oxide, 800 g / ton of zinc sulfate, and 400 g / ton of sodium sulfite are added sequentially and stirred for 5 minutes. Then, 12 g / ton of KF-6 and 7 g / ton of H2O are added and stirred for 3 minutes for roughing. For the roughing froth, 300 g / ton of calcium oxide, 320 g / ton of zinc sulfate, and 160 g / ton of sodium sulfite are added sequentially and stirred for 5 minutes. Then, 7 g / ton of KF-6 is added and stirred for 3 minutes for cleaning.

[0087] D. Talc Removal by Reverse Flotation: The coarse copper concentrate containing talc obtained in step C is successively added with 250 g / ton of sodium sulfide and stirred for 4 minutes. Then, 5 g / ton of H2O is added and stirred for 3 minutes for the first cleaning. The foam from the first cleaning is then mixed with 80 g / ton of sodium sulfide and stirred for 4 minutes. The foam product from the second cleaning is the removed talc.

[0088] E. Roughing of molybdenum with difficult-to-process copper and fine-grained copper: For the roughing tailings from step C, add 800 g / ton of calcium oxide, 600 g / ton of zinc sulfate, and 300 g / ton of sodium sulfite in sequence, stir for 5 minutes, add 25 g / ton of PG-2 and 40 g / ton of H2O, stir for 3 minutes, and perform one roughing process; For the roughing tailings, add 500 g / ton of calcium oxide, 600 g / ton of zinc sulfate, and 300 g / ton of sodium sulfite in sequence, stir for 5 minutes, add 15 g / ton of PG-2 and 15 g / ton of H2O, stir for 3 minutes, and perform one scavenging process.

[0089] F. Secondary grinding: The frothy product from the roughing process in step E is combined with the tailings from the fast flotation process in step C. Calcium oxide (300 g / ton), zinc sulfate (300 g / ton), sodium sulfite (150 g / ton), and HD-6 (100 g / ton) are added for secondary grinding. The grinding fineness is -45 μm, accounting for 70%.

[0090] G. Molybdenum mixed with difficult-to-select copper and fine-grained copper for beneficiation: The slurry obtained in step F is sequentially added with 8 g / ton of PG-2 and 3 g / ton of emulsified kerosene, stirred for 3 minutes, then 10 g / ton of H2O is added and stirred for 3 minutes for the first beneficiation. For the first beneficiation foam, 300 g / ton of calcium oxide is added and stirred for 5 minutes, then 5 g / ton of PG-2 is added and stirred for 3 minutes for the second beneficiation. For the second beneficiation foam, 80 g / ton of calcium oxide is added and stirred for 5 minutes for the third beneficiation. For the tailings of beneficiation 1, 160 g / ton of zinc sulfate, 80 g / ton of sodium sulfite, and 60 g / ton of HD-6 are added and stirred for 5 minutes, then 5 g / ton of PG-2 and 2 g / ton of emulsified kerosene are added and stirred for 3 minutes, then 6 g / ton of H2O is added and stirred for 3 minutes for fine scavenging. The fine scavenging foam is returned to beneficiation 1, and the foam from beneficiation 3 and 2 is returned step by step.

[0091] H. Copper-Molybdenum Separation: The tailings from the back-flotation and impurity removal process 1 in step D are combined with the foam from the finer process 3 in step G. Sodium sulfide 400 g / ton is added sequentially, and the mixture is stirred for 5 minutes. Then, emulsified kerosene 20 g / ton is added, and the mixture is stirred for 3 minutes for a roughing process. The roughing tailings are the final copper concentrate product. Sodium sulfide 150 g / ton is added to the roughing foam, and the mixture is stirred for 5 minutes. Then, emulsified kerosene 10 g / ton is added, and the mixture is stirred for 3 minutes for a first finer process. Sodium sulfide 80 g / ton is added to the first finer foam, and the mixture is stirred for 5 minutes for a second finer process. Sodium sulfide 30 g / ton is added to the second finer foam, and the mixture is stirred for 5 minutes for a third finer process. The finer tailings are returned step by step, and the third finer foam is the final molybdenum concentrate product.

[0092] I. Zinc Recovery: The tailings from step E (scavenging) and step G (fine scavenging) are combined, and 800 g / ton of calcium oxide is added sequentially, stirred for 5 minutes. Then, 200 g / ton of copper sulfate is added, stirred for 4 minutes, 20 g / ton of butyl xanthate and 15 g / ton of pine oil are added, and stirred for 3 minutes for the first roughing process. The roughing tailings are then scavenged again with 8 g / ton of butyl xanthate and 5 g / ton of pine oil added, stirred for 3 minutes. The scavenged tailings are the final tailings. The roughing foam is then treated with 300 g / ton of calcium oxide, stirred for 5 minutes, and 3 g / ton of butyl xanthate added, stirred for 3 minutes for the first fine cleaning process. The first fine cleaning foam is then treated with 150 g / ton of calcium oxide, stirred for 5 minutes for the second fine cleaning process. The fined tailings are returned step by step, and the second fine cleaning foam is the final zinc concentrate product.

[0093] Using the above process to process the ore, the technical indicators obtained are as follows: copper concentrate with a Cu grade of 26.33% and a Cu recovery rate of 86.28%; molybdenum concentrate with a Mo grade of 35.72% and a Mo recovery rate of 63.32%; and zinc concentrate with a Zn grade of 42.13% and a Zn recovery rate of 65.26%. This improves the comprehensive utilization rate of refractory mineral resources.

[0094] Example 2

[0095] A certain mineral processing plant contains 0.53% copper, 0.032% molybdenum, 0.38% zinc, and 17.15% iron. The main metallic minerals are sulfide minerals (chalcopyrite, chalcocite, arsenic sulfide, molybdenite, sphalerite, and pyrite). The secondary copper content is high, and the pulp contains a large amount of soluble harmful metal ions. The above mineral sample will be processed through the following steps:

[0096] A. Pretreatment of Harmful Metal Ions: The crushed ore is rapidly washed using a cylindrical screen with a 7mm aperture. The undersize slurry is classified by a hydrocyclone, and the overflow slurry is concentrated in a thickener. The underflow concentration of the thickener is 52%. Sodium sulfide (190 g / ton) and calcium oxide (50 g / ton) are added to the thickener overflow water and stirred at 300 rpm for 5 minutes. The pretreated deionized water is returned to the grinding and flotation processes.

[0097] B. First stage of grinding and classification: The ore over the cylindrical screen after washing is ground. The water added during grinding is deionized water that has been pretreated to remove harmful metal ions. The ground product and the undersize product from the cylindrical screen are combined and enter the hydrocyclone for classification. The fineness of the classified ore is -74μm, accounting for 53%.

[0098] C. Rapid coarse flotation: After the slurry obtained in step B is concentrated by a thickener, deionized water pretreated with harmful metal ions is added to the thickener underflow for slurry conditioning to a concentration of 31%. Then, 3000 g / ton of calcium oxide, 900 g / ton of zinc sulfate, and 450 g / ton of sodium sulfite are added sequentially and stirred for 5 minutes. Next, 10 g / ton of KF-6 and 5 g / ton of H2O are added and stirred for 3 minutes for roughing. For the roughing froth, 400 g / ton of calcium oxide, 360 g / ton of zinc sulfate, and 180 g / ton of sodium sulfite are added sequentially and stirred for 5 minutes. Finally, 6 g / ton of KF-6 is added and stirred for 3 minutes for cleaning.

[0099] D. Talc Removal by Reverse Flotation: The coarse copper concentrate containing talc obtained in step C is successively added with 300 g / ton of sodium sulfide and stirred for 5 minutes. Then, 6 g / ton of H2O is added and stirred for 3 minutes for the first cleaning. During the first cleaning, 100 g / ton of sodium sulfide is added to the foam and stirred for 5 minutes. The foam product from the second cleaning is the removed talc.

[0100] E. Roughing of molybdenum with difficult-to-process copper and fine-grained copper: For the roughing tailings from step C, add 100 g / ton of calcium oxide, 700 g / ton of zinc sulfate, and 350 g / ton of sodium sulfite in sequence, stir for 5 minutes, add 25 g / ton of PG-2 and 35 g / ton of H2O, stir for 3 minutes, and perform one roughing process; For the roughing tailings, add 800 g / ton of calcium oxide, 600 g / ton of zinc sulfate, and 300 g / ton of sodium sulfite in sequence, stir for 5 minutes, add 15 g / ton of PG-2 and 12 g / ton of H2O, stir for 3 minutes, and perform one scavenging process.

[0101] F. Secondary grinding: The frothy product from the roughing process in step E is combined with the tailings from the fast flotation process in step C. Calcium oxide 400 g / ton, zinc sulfate 350 g / ton, sodium sulfite 175 g / ton, and HD-6 120 g / ton are added for secondary grinding. The grinding fineness is -45 μm, accounting for 72%.

[0102] G. Molybdenum mixed with difficult-to-select copper and fine-grained copper for beneficiation: The slurry obtained in step F is sequentially added with 9 g / ton of PG-2 and 4 g / ton of emulsified kerosene, stirred for 3 minutes, then 10 g / ton of H2O is added and stirred for 3 minutes for the first beneficiation. For the first beneficiation foam, 400 g / ton of calcium oxide is added and stirred for 5 minutes, then 6 g / ton of PG-2 is added and stirred for 3 minutes for the second beneficiation. For the second beneficiation foam, 100 g / ton of calcium oxide is added and stirred for 5 minutes for the third beneficiation. For the tailings of beneficiation 1, 160 g / ton of zinc sulfate, 80 g / ton of sodium sulfite, and 80 g / ton of HD-6 are added and stirred for 5 minutes, then 5 g / ton of PG-2 and 2 g / ton of emulsified kerosene are added and stirred for 3 minutes, then 6 g / ton of H2O is added and stirred for 3 minutes for fine scavenging. The fine scavenging foam is returned to beneficiation 1, and the foam from beneficiation 3 and 2 is returned step by step.

[0103] H. Copper-Molybdenum Separation: The tailings from the back-flotation and impurity removal process 1 in step D are combined with the foam from the finer process 3 in step G. Sodium sulfide 400 g / ton is added sequentially, and the mixture is stirred for 5 minutes. Then, emulsified kerosene 20 g / ton is added, and the mixture is stirred for 3 minutes for a roughing process. The roughing tailings are the final copper concentrate product. Sodium sulfide 120 g / ton is added to the roughing foam, and the mixture is stirred for 5 minutes. Then, emulsified kerosene 10 g / ton is added, and the mixture is stirred for 3 minutes for a first finer process. Sodium sulfide 70 g / ton is added to the first finer foam, and the mixture is stirred for 5 minutes for a second finer process. Sodium sulfide 25 g / ton is added to the second finer foam, and the mixture is stirred for 5 minutes for a third finer process. The finer tailings are returned step by step, and the third finer foam is the final molybdenum concentrate product.

[0104] I. Zinc Recovery: The tailings from step E (scavenging) and step G (fine scavenging) are combined, and 1200 g / ton of calcium oxide is added sequentially, stirred for 5 minutes, followed by 200 g / ton of copper sulfate, stirred for 4 minutes, 22 g / ton of butyl xanthate and 16 g / ton of pine oil, stirred for 3 minutes, for the first roughing stage. For the roughing tailings, 10 g / ton of butyl xanthate and 5 g / ton of pine oil are added, stirred for 3 minutes, for the first scavenging stage. The scavenged tailings are the final tailings. For the roughing foam, 400 g / ton of calcium oxide is added, stirred for 5 minutes, followed by 3 g / ton of butyl xanthate, stirred for 3 minutes, for the first fine cleaning stage. For the first fine cleaning foam, 200 g / ton of calcium oxide is added, stirred for 5 minutes, for the second fine cleaning stage. The fined tailings are returned step by step, and the foam from the second fine cleaning stage is the final zinc concentrate product.

[0105] Using the above process to process the ore, the technical indicators obtained are as follows: copper concentrate with a Cu grade of 26.59% and a Cu recovery rate of 86.78%; molybdenum concentrate with a Mo grade of 45.12% and a Mo recovery rate of 70.83%; and zinc concentrate with a Zn grade of 46.13% and a Zn recovery rate of 65.44%. This improves the comprehensive utilization rate of refractory mineral resources.

[0106] Example 3

[0107] A certain ore processing plant contains 0.46% copper, 0.022% molybdenum, 0.53% zinc, and 14.11% iron. The main metallic minerals are sulfide minerals (chalcopyrite, chalcocite, covellite, molybdenite, sphalerite, and pyrite). The secondary copper content is high, and the slurry contains a large amount of harmful metal ions such as copper ions. The above ore sample will be processed through the following steps:

[0108] A. Pretreatment of Harmful Metal Ions: The crushed ore is rapidly washed using a cylindrical screen with a 6mm aperture. The undersize slurry is classified by a hydrocyclone, and the overflow slurry is concentrated in a thickener. The underflow concentration of the thickener is 47%. Sodium sulfide (150g / ton) and calcium oxide (45g / ton) are added to the thickener overflow water and stirred at 280 rpm for 4 minutes. The pretreated deionized water is returned to the grinding and flotation processes.

[0109] B. First stage of grinding and classification: The ore over the cylindrical screen after washing is ground. The water added during grinding is deionized water that has been pretreated to remove harmful metal ions. The ground product and the undersize product from the cylindrical screen are combined and enter the hydrocyclone for classification. The fineness of the classified ore is -74μm, accounting for 52%.

[0110] C. Rapid coarse flotation: After the slurry obtained in step B is concentrated by a thickener, deionized water pretreated with harmful metal ions is added to the thickener underflow for slurry conditioning to a concentration of 33%. Then, 2500 g / ton of calcium oxide, 1000 g / ton of zinc sulfate, and 500 g / ton of sodium sulfite are added sequentially and stirred for 5 minutes. Then, 13 g / ton of KF-6 and 6 g / ton of H2O are added and stirred for 3 minutes for roughing. For the roughing froth, 300 g / ton of calcium oxide, 400 g / ton of zinc sulfate, and 200 g / ton of sodium sulfite are added sequentially and stirred for 5 minutes. Then, 7 g / ton of KF-6 is added and stirred for 3 minutes for cleaning.

[0111] D. Talc Removal by Reverse Flotation: The coarse copper concentrate containing talc obtained in step C is successively added with 280 g / ton of sodium sulfide and stirred for 4 minutes. Then, 7 g / ton of H2O is added and stirred for 3 minutes for the first cleaning. The foam from the first cleaning is then mixed with 70 g / ton of sodium sulfide and stirred for 4 minutes. The foam product from the second cleaning is the removed talc.

[0112] E. Roughing of molybdenum with difficult-to-process copper and fine-grained copper: For the roughing tailings from step C, add 700 g / ton of calcium oxide, 800 g / ton of zinc sulfate, and 400 g / ton of sodium sulfite in sequence, stir for 6 minutes, add 30 g / ton of PG-2 and 40 g / ton of H2O, stir for 3 minutes, and perform one roughing process; For the roughing tailings, add 500 g / ton of calcium oxide, 700 g / ton of zinc sulfate, and 350 g / ton of sodium sulfite in sequence, stir for 5 minutes, add 12 g / ton of PG-2 and 10 g / ton of H2O, stir for 3 minutes, and perform one scavenging process.

[0113] F. Secondary grinding: The frothy product from the roughing process in step E is combined with the tailings from the fast flotation process in step C. Calcium oxide 300 g / ton, zinc sulfate 400 g / ton, sodium sulfite 200 g / ton, and HD-6 110 g / ton are added for secondary grinding. The grinding fineness is -45 μm, accounting for 75%.

[0114] G. Molybdenum mixed with difficult-to-select copper and fine-grained copper for beneficiation: The slurry obtained in step F is sequentially added with 8 g / ton of PG-2 and 3 g / ton of emulsified kerosene, stirred for 3 minutes, then 10 g / ton of H2O is added and stirred for 3 minutes for the first beneficiation. For the first beneficiation foam, 300 g / ton of calcium oxide is added and stirred for 5 minutes, then 5 g / ton of PG-2 is added and stirred for 3 minutes for the second beneficiation. For the second beneficiation foam, 80 g / ton of calcium oxide is added and stirred for 5 minutes for the third beneficiation. For the tailings of beneficiation 1, 200 g / ton of zinc sulfate, 100 g / ton of sodium sulfite, and 70 g / ton of HD-6 are added and stirred for 5 minutes, then 5 g / ton of PG-2 and 2 g / ton of emulsified kerosene are added and stirred for 3 minutes, then 7 g / ton of H2O is added and stirred for 3 minutes for fine scavenging. The fine scavenging foam is returned to beneficiation 1, and the foam from beneficiation 3 and 2 is returned step by step.

[0115] H. Copper-Molybdenum Separation: The tailings from the back-flotation and impurity removal process 1 in step D are combined with the foam from the finer process 3 in step G. Sodium sulfide 350 g / ton is added sequentially, and the mixture is stirred for 6 minutes. Then, emulsified kerosene 25 g / ton is added, and the mixture is stirred for 3 minutes for a roughing process. The roughing tailings are the final copper concentrate product. Sodium sulfide 160 g / ton is added to the roughing foam, and the mixture is stirred for 6 minutes. Then, emulsified kerosene 12 g / ton is added, and the mixture is stirred for 3 minutes for a first finer process. Sodium sulfide 90 g / ton is added to the first finer foam, and the mixture is stirred for 5 minutes for a second finer process. Sodium sulfide 40 g / ton is added to the second finer foam, and the mixture is stirred for 5 minutes for a third finer process. The finer tailings are returned step by step, and the third finer foam is the final molybdenum concentrate product.

[0116] I. Zinc Recovery: The tailings from step E (scavenging) and step G (fine scavenging) are combined. 800 g / ton of calcium oxide is added sequentially, stirred for 5 minutes; 200 g / ton of copper sulfate is added, stirred for 4 minutes; 25 g / ton of butyl xanthate and 15 g / ton of pine oil are added, stirred for 3 minutes, and this constitutes the first roughing process. For the roughing tailings, 12 g / ton of butyl xanthate and 6 g / ton of pine oil are added, stirred for 3 minutes, and this constitutes the first scavenging process. The scavenged tailings are the final tailings. For the roughing foam, 350 g / ton of calcium oxide is added, stirred for 5 minutes; 3 g / ton of butyl xanthate is added, stirred for 3 minutes, and this constitutes the first fine cleaning process. For the first fine cleaning foam, 180 g / ton of calcium oxide is added, stirred for 5 minutes, and this constitutes the second fine cleaning process. The fined tailings are returned step by step, and the foam from the second fine cleaning is the final zinc concentrate product.

[0117] Using the above process to process the ore, the technical indicators obtained are as follows: copper concentrate with a Cu grade of 25.01% and a Cu recovery rate of 83.26%; molybdenum concentrate with a Mo grade of 40.09% and a Mo recovery rate of 62.22%; and zinc concentrate with a Zn grade of 47.22% and a Zn recovery rate of 72.44%. This improves the comprehensive utilization rate of refractory mineral resources.

Claims

1. A beneficiation method for a complex altered copper-molybdenum ore with high sulfur, high iron, high talc content and zinc content, characterized in that, The beneficiation method for high-sulfur, high-iron, high-talc, zinc-bearing, complex altered copper-molybdenum ore includes pretreatment, rapid coarse flotation, talc reverse flotation removal, mixed roughing, mixed cleaning, and post-treatment steps, specifically including: A. Pre-processing: 1) The high-sulfur, high-talc, zinc-containing complex altered copper-molybdenum ore to be processed is crushed and washed to obtain oversize ore a and undersize slurry b; 2) The undersize slurry b is classified by a hydrocyclone to obtain the undersize slurry c and the overflow slurry d; the overflow slurry d is concentrated to obtain the thickener undersize slurry e; the thickener overflow water is added with an ion pretreatment agent and stirred to pretreat harmful metal ions to obtain deionized water f after pretreatment of harmful metal ions. 3) Add deionized water f after pretreatment with harmful metal ions to the ore a on the screen and grind it to obtain the ground product g. The ground product g is combined with the classifying underflow c and classified until the ore fineness is -74μm accounting for 50%~55% to obtain the slurry h. B. Rapid coarse flotation: After the slurry h is concentrated by a thickener, deionized water f pretreated with harmful metal ions and thickener underflow e are added to adjust the slurry concentration to 30-40%. Then, pyrite inhibitor, zinc inhibitor, highly selective copper collector and frother are added in sequence to perform one roughing and one cleaning process to obtain talc-containing coarse copper concentrate i, roughing tailings j and cleaning tailings k. C. Talc removal by reverse flotation: Copper inhibitor and frother are added sequentially to the coarse copper concentrate i containing talc for two reverse flotation cleaning processes to obtain the tailings l of the reverse flotation cleaning process and the froth product m of the second cleaning process, which is the removed talc. D. Mixed roughing: Pyrite inhibitor, zinc inhibitor, strong copper-molybdenum collector and frother are added sequentially to the roughing tailings j to perform one roughing and one scavenging to obtain froth product n and scavenging tailings o. E. Mixed Selection: 1) Combine the foam product n with the selected tailings k, and add pyrite inhibitor, zinc inhibitor and talc inhibitor in sequence for grinding. The grinding fineness is -45µm accounting for 70~75% to obtain slurry p. 2) Add pyrite inhibitor, molybdenum collector, zinc inhibitor, talc inhibitor and frother to slurry p in sequence, and perform three cleaning and one fine scavenging to obtain foam product q and fine scavenging tailings r; the tailings of cleaning 1 enter fine scavenging, the fine scavenging foam is returned to cleaning 1, and the foam of cleaning 3 and cleaning 2 is returned step by step; F. Post-processing: 1) Combine the tailings l from the reverse flotation and impurity removal process with the foam product q, add copper inhibitor and molybdenum collector in sequence, and perform one roughing and three cleaning processes to obtain molybdenum concentrate and copper concentrate. The cleaning tailings are returned step by step. The foam from the third cleaning process is the molybdenum concentrate product, and the tailings from the roughing process are the copper concentrate product with coarsened particle size distribution. 2) Combine the scavenging tailings o with the fine scavenging tailings r, and add pyrite inhibitor, zinc activator, collector and frother in sequence. Perform one roughing, one scavenging and two cleaning processes. The scavenging tailings are the final tailings, and the foam from the second cleaning process is the zinc concentrate product.

2. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, In step 2), the process conditions for adding ion pretreatment agent to the overflow water of the concentrator and stirring are as follows: add 100~300g / t of ion pretreatment agent, stir at a speed of 200~300r / min, and stir for 3~5min.

3. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1 or 2, characterized in that, The ion pretreatment agent is composed of sodium sulfide and calcium oxide, wherein the mass percentage of sodium sulfide is 70-80% and the mass percentage of calcium oxide is 20-30%.

4. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, The pyrite inhibitor mentioned in step B is calcium oxide; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the highly selective copper collector is KF-6, which consists of cycloalkyl thiocarbamate, ethylene glycol chlorocarbamate, and sodium trialkyl sulfate, wherein cycloalkyl thiocarbamate accounts for 60%-70%, ethylene glycol chlorocarbamate accounts for 20%-30%, and sodium trialkyl sulfate accounts for 10%-20%; the foaming agent is H2O, which consists of ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%-80% and polypropylene glycol butyl ether accounts for 20%-30%.

5. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, The copper inhibitor mentioned in step C is sodium sulfide; the foaming agent is H2O, wherein the H2O is composed of ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%~80% and polypropylene glycol butyl ether accounts for 20%~30%.

6. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, The pyrite inhibitor mentioned in step D is calcium oxide; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the strong copper-molybdenum collector is PG-2, which consists of ethyl dixanthate, cycloolefin carbamate, and sodium amino acid sulfonate, wherein ethyl dixanthate accounts for 40%~50%, cycloolefin carbamate accounts for 35%~40%, and sodium amino acid sulfonate accounts for 10%~25%; the foaming agent is H2O, which consists of ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%~80% and polypropylene glycol butyl ether accounts for 20%~30%.

7. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, The pyrite inhibitor mentioned in step 1) is calcium oxide; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the talc inhibitor is HD-6, which consists of sodium tripolyphosphate and fructan, wherein sodium tripolyphosphate accounts for 30% to 50% and fructan accounts for 50% to 70%.

8. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, The pyrite inhibitor mentioned in step 2) is calcium oxide; the molybdenum collector is emulsified kerosene; the zinc inhibitor is a mixture of zinc sulfate and sulfite in a mass ratio of 2:1; the talc inhibitor is HD-6, wherein HD-6 consists of sodium tripolyphosphate and fructan, wherein sodium tripolyphosphate accounts for 30%~50% and fructan accounts for 50%~70%; the foaming agent is H2O, wherein H2O consists of ethylene glycol and polypropylene glycol butyl ether, wherein ethylene glycol accounts for 70%~80% and polypropylene glycol butyl ether accounts for 20%~30%.

9. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, The copper inhibitor mentioned in step 1) is sodium sulfide; the molybdenum collector is emulsified kerosene.

10. The beneficiation method for complex altered copper-molybdenum ore with high sulfur, high iron, high talc, and zinc content according to claim 1, characterized in that, The pyrite inhibitor mentioned in step 2) is calcium oxide; the zinc activator is copper sulfate; the collector is butyl xanthate; and the foaming agent is pine oil.

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