A beneficiation method of copper-zinc associated gold ore

Abstract

This application provides a beneficiation method for copper-zinc associated gold deposits, relating to the field of mineral processing. The method involves pulping the raw ore and performing copper-zinc co-flotation roughing to obtain copper-zinc co-flotation rough concentrate and copper-zinc co-flotation rough tailings; the co-flotation rough concentrate is then subjected to copper separation roughing to obtain copper rough concentrate and separation roughing tailings; the copper rough concentrate is then further refined to obtain copper concentrate; the separation roughing tailings are then scavenged to obtain zinc scavenged concentrate; the copper-zinc co-flotation rough tailings are then subjected to zinc-sulfur mixed roughing to obtain zinc-sulfur rough concentrate and zinc-sulfur rough tailings; the zinc-sulfur rough concentrate is then further refined to obtain zinc-sulfur concentrate; the zinc scavenged concentrate and zinc-sulfur concentrate are then subjected to zinc-sulfur separation roughing to obtain zinc rough concentrate and sulfur rough concentrate; the sulfur rough concentrate is then scavenged to obtain sulfur concentrate; the zinc rough concentrate is then refined to obtain gold-bearing zinc concentrate; the gold-bearing zinc concentrate is then subjected to carbon leaching to obtain leaching pulp and gold-loaded carbon; the leaching pulp is then pressure filtered to obtain zinc concentrate and cyanide-containing lean liquor; and the gold-loaded carbon is then desorbed to obtain regenerated carbon and precious liquor. This method enables efficient and comprehensive recovery of raw ore.

Description

Technical Field

[0001] This application relates to the field of mineral processing, and more particularly to a method for processing copper-zinc associated gold deposits. Background Technology

[0002] Copper and zinc sulfide ores are mainly composed of chalcopyrite and sphalerite, which often occur together in the same ore body. In different types of copper-zinc ores, copper and zinc are often closely interdependent, with very fine crystal grains. Secondary copper minerals dissolve in the pulp, activating the sphalerite with dissolved copper ions. During flotation, the floatability of activated sphalerite is similar to that of copper minerals, which is extremely detrimental to improving the quality of copper concentrate and zinc recovery. These factors can affect every stage of the copper-zinc separation process, making copper-zinc flotation difficult. Furthermore, some copper-zinc resources often contain precious metals such as gold and silver; the recovery efficiency of these precious metals directly affects the economic benefits of flotation.

[0003] Copper-zinc ore beneficiation processes often employ a preferential flotation process that suppresses zinc and floats copper. In the copper beneficiation stage, a large amount of zinc depressant is typically added, followed by the addition of copper sulfate in the zinc beneficiation stage to activate and recover zinc. However, due to the dissolution of secondary copper minerals in the slurry during the copper beneficiation stage, and the residual copper sulfate added during zinc beneficiation returning to the process in the reflux water, zinc is activated during the copper beneficiation stage. Moreover, this activated zinc is difficult to suppress by conventional zinc depressants and thus enters the copper concentrate, affecting not only the quality of the copper concentrate but also causing the loss of zinc resources.

[0004] Therefore, there is an urgent need to provide a beneficiation method for copper-zinc associated gold deposits that has solved the above problems. Summary of the Invention

[0005] The purpose of this application is to provide a beneficiation method for copper-zinc associated gold deposits to solve the above-mentioned problems.

[0006] To achieve the above objectives, this application provides a beneficiation method for copper-zinc associated gold deposits, comprising:

[0007] Copper-zinc associated gold ore, pH adjuster, regenerated carbon and adjuster are mixed, firstly ground, and pulped to obtain raw ore slurry; the raw ore slurry, collector and frother are mixed and copper-zinc and other floatable roughing is carried out to obtain copper-zinc and other floatable rough concentrate and copper-zinc and other floatable roughing tailings;

[0008] The equal floatable rough concentrate, recycled carbon, and modifier are mixed and then ground a second time to obtain a refractory equal floatable rough concentrate. The refractory equal floatable rough concentrate and depressant are mixed and then subjected to copper separation roughing to obtain a copper rough concentrate and separation roughing tailings. The copper rough concentrate and depressant are mixed and then subjected to copper separation cleaning to obtain a copper concentrate. The separation roughing tailings and collector are mixed and then subjected to copper separation scavenging to obtain a zinc scavenging concentrate.

[0009] The copper-zinc and other floatable roughing tailings, activator, collector and frother are mixed and subjected to zinc-sulfur mixed roughing to obtain zinc-sulfur roughing concentrate and zinc-sulfur roughing tailings; the zinc-sulfur roughing concentrate is subjected to zinc-sulfur fine cleaning to obtain zinc-sulfur concentrate; the zinc-sulfur roughing tailings, activator and collector are mixed and subjected to zinc-sulfur scavenging to obtain zinc-sulfur tailings.

[0010] The zinc scavenging concentrate and zinc-sulfur concentrate are mixed and subjected to a third grinding process to obtain a zinc-sulfur mixed concentrate. The zinc-sulfur mixed concentrate, pH adjuster, activator, collector, and frother are mixed and subjected to zinc-sulfur separation roughing to obtain zinc rough concentrate and sulfur rough concentrate. The sulfur rough concentrate, activator, and collector are mixed and subjected to sulfur scavenging to obtain sulfur concentrate.

[0011] The zinc crude concentrate and pH adjuster are subjected to zinc beneficiation to obtain gold-bearing zinc concentrate. The gold-bearing zinc concentrate, leaching agent and activated carbon are mixed and carbon-leached to obtain leaching slurry and gold-loaded carbon. The leaching slurry is pressure filtered to obtain zinc concentrate and cyanide-containing lean liquor. The gold-loaded carbon is desorbed to obtain regenerated carbon and precious liquor.

[0012] Optionally, the gold grade in the copper-zinc associated gold ore is ≥1 g / t, the copper grade is greater than 0.4%, and the zinc grade is greater than 0.4%.

[0013] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0014] (1) The pH adjuster includes one or more of lime, sodium hydroxide, sodium humate and calcium chloride;

[0015] (2) The modifier is sodium sulfide and / or sodium hydrosulfide;

[0016] (3) The collector includes one or more of ethyl xanthate, thiazolyl xanthate, isopropyl xanthate, ethyl thiocyanate, phenylammonium black, butylammonium black and ethyl thiocyanate;

[0017] (4) The foaming agent includes one or more of methyl isobutyl methanol, pine oil, pine alcohol oil and butyl ether alcohol.

[0018] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0019] (1) The inhibitor comprises zinc sulfate, sodium sulfide and calcium chloride; the mass ratio of zinc sulfate, sodium sulfide and calcium chloride is 1.5-2.5:1-1.5:0.5-1;

[0020] (2) The activator includes one or more of copper sulfate, copper nitrate and lead nitrate;

[0021] (3) The leaching agent includes sodium cyanide and / or potassium cyanide.

[0022] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0023] (1) In the first grinding process, the mass of the pH adjuster is 50-3000 g / t of raw ore;

[0024] (2) In the first grinding process, the mass of the modifier is 20-2000 g / t of raw ore;

[0025] (3) In the first grinding process, the mass of the recycled carbon is 10-500 g / t of raw ore;

[0026] (4) The mass percentage of the raw ore slurry with a fineness of less than 74 μm is 60-90%;

[0027] (5) In the roughing process of copper, zinc and other floatable materials, the mass of the collector is 20-200 g / t of raw ore;

[0028] (6) In the roughing process of copper, zinc and other floatable materials, the mass of the frother is 4-40 g / t of raw ore.

[0029] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0030] (1) In the second grinding process, the mass of the pH adjuster is 50-800 g / t of raw ore;

[0031] (2) In the second grinding process, the mass of the recycled carbon is 10-500 g / t of raw ore;

[0032] (3) In the second grinding process, the mass of the modifier is 20-2000 g / t of raw ore;

[0033] (4) The mass percentage of the regrinded and other floatable rough concentrate with a fineness of less than 38 μm is 70-90%;

[0034] (5) In the copper separation roughing and copper separation cleaning processes, the mass of the inhibitor is independently 20-800 g / t of raw ore;

[0035] (6) In the copper separation and scavenging process, the mass of the collector is 0-20 g / t of raw ore.

[0036] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0037] (1) In the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the activator is 20-200 g / t of raw ore;

[0038] (2) In the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the collector is 20-200 g / t of raw ore;

[0039] (3) In the zinc-sulfur mixed roughing process, the mass of each frother is 0-30 g / t of raw ore.

[0040] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0041] (1) The zinc-sulfur mixed concentrate has a fineness of less than 38 μm, accounting for 80-95% by mass;

[0042] (2) In the zinc-sulfur separation roughing, sulfur scavenging and zinc cleaning processes, the mass of the pH adjuster is 20-800 g / t of raw ore;

[0043] (3) In the zinc-sulfur separation roughing process, the mass of the activator is 10-200 g / t of raw ore;

[0044] (4) In the zinc-sulfur separation roughing and sulfur scavenging processes, the mass of the collector is 10-200 g / t of raw ore;

[0045] (5) In the zinc-sulfur separation roughing process, the mass of the frother is 0-20 g / t of raw ore;

[0046] (6) The mass of the leaching agent is 50-5000 g / t of raw ore.

[0047] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0048] (1) The pH value of the raw ore slurry is 8-10;

[0049] (2) The pH value of the re-grindable rough concentrate is 11-13;

[0050] (3) The pH value of the zinc-sulfur separation roughing process is 11-13;

[0051] (4) The selected zinc has a pH value of 11-13.

[0052] Optionally, the beneficiation method for copper-zinc associated gold deposits satisfies at least one of the following conditions:

[0053] (1) The cyanide-containing lean solution is returned to the zinc-sulfur separation roughing process;

[0054] (2) The recycled carbon obtained from the analysis is returned to the first grinding, the second grinding and carbon leaching.

[0055] Compared with the prior art, the beneficial effects of this application include:

[0056] The beneficiation method for copper-zinc associated gold deposits provided in this application employs a process of copper-zinc co-flotation followed by separation, zinc-sulfur mixed flotation, zinc-sulfur separation, and zinc concentrate cyanide leaching. Utilizing the differences in floatability between different minerals and even among the same mineral, copper-zinc co-flotation is performed without the addition of zinc depressants. Copper and a portion of the more floatable zinc are preferentially floated, followed by separation of copper and zinc to obtain copper concentrate and zinc scavenging concentrate. A portion of the associated gold is incorporated into the copper concentrate; this portion has a high valuation standard, achieving comprehensive recovery. The tailings from the copper-zinc co-flotation are subjected to zinc-sulfur mixed flotation to obtain zinc-sulfur concentrate. The zinc rough concentrate and zinc-sulfur concentrate are then mixed and regrinded to obtain zinc concentrate and sulfur concentrate. A portion of the gold encapsulated within the concentrate is liberated through grinding and then further processed. In zinc concentrate, gold in this portion of the zinc concentrate is recovered through carbon leaching to obtain zinc concentrate and gold-loaded carbon. After regeneration, a portion of the gold-loaded carbon is recycled into the flotation process to synergistically adsorb copper ions in the pulp with sodium sulfide, thereby reducing the adverse effects of copper ions on copper-zinc separation. This portion of the regenerated carbon, which may contain residual gold, can also enter the copper concentrate due to its good floatability, resulting in high gold recovery efficiency. The zinc concentrate is then filtered and washed to obtain cyanide-containing lean liquor, which is returned to the zinc-sulfur separation operation. This strengthens sulfur suppression, reduces lime usage, and improves the flotation environment. This process achieves efficient and comprehensive recovery of copper-zinc associated gold ores. Attached Figure Description

[0057] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope of this application.

[0058] Figure 1 This is a schematic diagram of the beneficiation method for copper-zinc associated gold ore provided in Example 1. Detailed Implementation

[0059] First, the solution provided in this application will be explained in more detail as follows:

[0060] This application provides a beneficiation method for copper-zinc associated gold deposits, comprising:

[0061] Copper-zinc associated gold ore, pH adjuster, regenerated carbon and adjuster are mixed, firstly ground, and pulped to obtain raw ore slurry; the raw ore slurry, collector and frother are mixed and copper-zinc and other floatable roughing is carried out to obtain copper-zinc and other floatable rough concentrate and copper-zinc and other floatable roughing tailings;

[0062] The equal floatable rough concentrate, recycled carbon, and modifier are mixed and then ground a second time to obtain a refractory equal floatable rough concentrate. The refractory equal floatable rough concentrate and depressant are mixed and then subjected to copper separation roughing to obtain a copper rough concentrate and separation roughing tailings. The copper rough concentrate and depressant are mixed and then subjected to copper separation cleaning to obtain a copper concentrate. The separation roughing tailings and collector are mixed and then subjected to copper separation scavenging to obtain a zinc scavenging concentrate.

[0063] The copper-zinc and other floatable roughing tailings, activator, collector and frother are mixed and subjected to zinc-sulfur mixed roughing to obtain zinc-sulfur roughing concentrate and zinc-sulfur roughing tailings; the zinc-sulfur roughing concentrate is subjected to zinc-sulfur fine cleaning to obtain zinc-sulfur concentrate; the zinc-sulfur roughing tailings, activator and collector are mixed and subjected to zinc-sulfur scavenging to obtain zinc-sulfur tailings.

[0064] The zinc scavenging concentrate and zinc-sulfur concentrate are mixed and subjected to a third grinding process to obtain a zinc-sulfur mixed concentrate. The zinc-sulfur mixed concentrate, pH adjuster, activator, collector, and frother are mixed and subjected to zinc-sulfur separation roughing to obtain zinc rough concentrate and sulfur rough concentrate. The sulfur rough concentrate, activator, and collector are mixed and subjected to sulfur scavenging to obtain sulfur concentrate.

[0065] The zinc crude concentrate and pH adjuster are subjected to zinc beneficiation to obtain gold-bearing zinc concentrate. The gold-bearing zinc concentrate, leaching agent and activated carbon are mixed and carbon-leached to obtain leaching slurry and gold-loaded carbon. The leaching slurry is pressure filtered to obtain zinc concentrate and cyanide-containing lean liquor. The gold-loaded carbon is desorbed to obtain regenerated carbon and precious liquor.

[0066] It is important to note that during pulping, modifiers and regenerated carbon are added, and combined with floatable processes such as copper-zinc separation, collectors with good copper selectivity are selected. Without adding zinc inhibitors, copper and a portion of the floatable zinc enter the copper-zinc floatable rough concentrate. Then, during the second regrinding process, modifiers and regenerated carbon are added again to minimize the activation effect of copper ions on zinc during separation. Zinc inhibitors are also added to strengthen the inhibition of zinc. This process significantly reduces the amount of zinc inhibitor used and mitigates the impact of large amounts of copper roughing inhibitors on the recovery of zinc, sulfur, and associated gold. Regenerated carbon, due to its certain adsorption capacity and the presence of residual gold, has always been a challenge for enterprises. This method not only fully utilizes the adsorption capacity of regenerated carbon but also, due to its good floatability, allows it to enter the copper concentrate during the process, ensuring comprehensive recovery of gold resources and providing a new avenue for the utilization of regenerated carbon.

[0067] The flotation method provided in this application effectively realizes the comprehensive recovery of copper-zinc associated gold. The recycling of recycled carbon eliminates the need for floatable operations such as copper and zinc and copper-zinc separation operations. The activation of zinc by copper ions in the slurry and the reuse of low-cyanide lean liquor enhance the efficiency of zinc-sulfur separation operations.

[0068] This application can effectively help enterprises increase production and revenue and ensure the safety of mineral resources by reducing adverse factors in copper and lead recycling, improving the recovery rate of associated metals and the utilization rate of copper and zinc resources.

[0069] In some embodiments, the gold grade in the copper-zinc associated gold ore is ≥1 g / t, the copper grade is greater than 0.4%, and the zinc grade is greater than 0.4%.

[0070] Optionally, the gold grade in copper-zinc associated gold deposits can be any value of 1 g / t, 1.1 g / t, 1.5 g / t, 2 g / t, 3 g / t, 5 g / t, or ≥1 g / t; the copper grade can be any value of 0.5%, 1%, 1.5%, 2%, 3%, 5%, 10%, or ≥0.4%; and the zinc grade can be any value of 0.5%, 1%, 1.5%, 2%, 3%, 5%, 10%, or ≥0.4%.

[0071] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0072] (1) The pH adjuster includes one or more of lime, sodium hydroxide, sodium humate and calcium chloride;

[0073] (2) The modifier is sodium sulfide and / or sodium hydrosulfide;

[0074] It is important to note the multiple functions of the modifier: first, its complexation with copper ions; second, its role in desorbing copper ions from the zinc mineral surface; and third, its synergistic adsorption with regenerated carbon. Because the zinc mineral surface is covered by copper ions and collectors, the zinc inhibitor cannot interact with it, thus inhibiting zinc flotation. However, the modifier desorbs copper ions and collectors from the zinc mineral surface into the slurry, where regenerated carbon then performs synergistic adsorption, freeing up action sites for the reagents on the zinc mineral surface. This allows the added zinc inhibitor to interact with the zinc mineral, altering its hydrophilicity and inhibiting its flotation. This significantly reduces the amount of copper ions in the slurry, mitigating the activation effect of copper ions on the zinc mineral.

[0075] (3) The collector includes one or more of ethyl xanthate, thiazolyl xanthate, isopropyl xanthate, ethyl thiocyanate, phenylammonium black, butylammonium black and ethyl thiocyanate;

[0076] In some embodiments, the collector includes thiazolidinyl sulfadiazine, ethyl thiocyanate, and butylammonium black powder; the mass ratio of thiazolidinyl sulfadiazine, ethyl thiocyanate, and butylammonium black powder is 1.2:1.8:0.5;

[0077] (4) The foaming agent includes one or more of methyl isobutyl methanol, pine oil, pine alcohol oil and butyl ether alcohol.

[0078] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0079] (1) The inhibitor comprises zinc sulfate, sodium sulfide and calcium chloride; the mass ratio of zinc sulfate, sodium sulfide and calcium chloride is 1.5-2.5:1-1.5:0.5-1; optionally, the mass ratio of zinc sulfate, sodium sulfide and calcium chloride can be any value between (1.5:1:0.5), (2:1:0.5), (2.5:1:0.5), (2:1.5:0.5), (2.5:1.5:1) or 1.5-2.5:1-1.5:0.5-1.

[0080] It should be noted that the above-mentioned combination of inhibitors can effectively utilize zinc and sulfur;

[0081] (2) The activator includes one or more of copper sulfate, copper nitrate and lead nitrate;

[0082] (3) The leaching agent includes sodium cyanide and / or potassium cyanide.

[0083] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0084] (1) In the first grinding process, the mass of the pH adjuster is 50-3000 g / t of raw ore;

[0085] Optionally, during the first grinding process, the mass of the pH adjuster can be 50 g / t raw ore, 100 g / t raw ore, 500 g / t raw ore, 1000 g / t raw ore, 2000 g / t raw ore, 3000 g / t raw ore, or any value between 50 and 3000 g / t raw ore.

[0086] (2) In the first grinding process, the mass of the modifier is 20-2000 g / t of raw ore;

[0087] Optionally, during the first grinding process, the mass of the modifier can be 20 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 500 g / t raw ore, 1000 g / t raw ore, 2000 g / t raw ore, or any value between 20 and 2000 g / t raw ore;

[0088] (3) In the first grinding process, the mass of the recycled carbon is 10-500 g / t of raw ore;

[0089] Optionally, during the first grinding process, the mass of the recycled carbon can be 10 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 250 g / t raw ore, 500 g / t raw ore, or any value between 10 and 500 g / t raw ore.

[0090] (4) The mass percentage of the raw ore slurry with a fineness of less than 74 μm is 60-90%;

[0091] Optionally, the mass percentage of the raw ore slurry with a fineness of less than 74 μm can be any value between 60%, 70%, 80%, 90%, or 60-90%.

[0092] (5) In the roughing process of copper, zinc and other floatable materials, the mass of the collector is 20-200 g / t of raw ore;

[0093] Optionally, in the flotation roughing process of copper, zinc, etc., the mass of the collector can be 20 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 150 g / t raw ore, 200 g / t raw ore or any value between 20 and 200 g / t raw ore;

[0094] (6) In the roughing process of copper, zinc and other floatable materials, the mass of the frother is 4-40 g / t of raw ore.

[0095] Optionally, in the flotation roughing process of copper, zinc, etc., the mass of the frother can be 4 g / t raw ore, 5 g / t raw ore, 10 g / t raw ore, 20 g / t raw ore, 30 g / t raw ore, 40 g / t raw ore, or any value between 4 and 40 g / t raw ore.

[0096] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0097] (1) In the second grinding process, the mass of the pH adjuster is 50-800 g / t of raw ore;

[0098] Optionally, during the second grinding process, the mass of the pH adjuster can be 50 g / t raw ore, 100 g / t raw ore, 200 g / t raw ore, 400 g / t raw ore, 600 g / t raw ore, 800 g / t raw ore, or any value between 50 and 800 g / t raw ore.

[0099] (2) In the second grinding process, the mass of the recycled carbon is 10-500 g / t of raw ore;

[0100] Optionally, during the second grinding process, the mass of the recycled carbon can be 10 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 200 g / t raw ore, 400 g / t raw ore, 500 g / t raw ore, or any value between 10 and 500 g / t raw ore.

[0101] (3) In the second grinding process, the mass of the modifier is 20-2000 g / t of raw ore;

[0102] Optionally, during the second grinding process, the mass of the modifier can be 20 g / t raw ore, 100 g / t raw ore, 500 g / t raw ore, 1000 g / t raw ore, 1500 g / t raw ore, 2000 g / t raw ore, or any value between 20 and 2000 g / t raw ore;

[0103] (4) The mass percentage of the regrinded and other floatable rough concentrate with a fineness of less than 38 μm is 70-90%;

[0104] Optionally, the mass percentage of regrinded or other floatable coarse concentrate with a fineness of less than 38 μm can be 70%, 80%, 90%, or any value between 70% and 90%.

[0105] (5) In the copper separation roughing and copper separation cleaning processes, the mass of the inhibitor is independently 20-800 g / t of raw ore;

[0106] (6) In the copper separation and scavenging process, the mass of the collector is 0-20 g / t of raw ore.

[0107] Optionally, during the copper separation and scavenging process, the mass of the collector can be 0 g / t raw ore, 5 g / t raw ore, 10 g / t raw ore, 15 g / t raw ore, 20 g / t raw ore, or any value between 0 and 20 g / t raw ore;

[0108] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0109] (1) In the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the activator is 20-200 g / t of raw ore;

[0110] Optionally, in the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the activator can be independently 20 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 150 g / t raw ore, 200 g / t raw ore, or any value between 20 and 200 g / t raw ore;

[0111] (2) In the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the collector is 20-200 g / t of raw ore;

[0112] Optionally, in the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the collector can be independently 20 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 150 g / t raw ore, 200 g / t raw ore, or any value between 20 and 200 g / t raw ore;

[0113] (3) In the zinc-sulfur mixed roughing process, the mass of the frother is 0-30 g / t of raw ore.

[0114] Optionally, in the zinc-sulfur mixed roughing process, the mass of the frother can be 0 g / t raw ore, 5 g / t raw ore, 10 g / t raw ore, 15 g / t raw ore, 20 g / t raw ore, 30 g / t raw ore, or any value between 0 and 30 g / t raw ore;

[0115] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0116] (1) The zinc-sulfur mixed concentrate has a fineness of less than 38 μm, accounting for 80-95% by mass;

[0117] Optionally, the mass percentage of the zinc-sulfur mixed concentrate with a fineness of less than 38 μm can be any value between 80%, 85%, 90%, 95%, or 80-95%.

[0118] (2) In the zinc-sulfur separation roughing, sulfur scavenging and zinc cleaning processes, the mass of the pH adjuster is 20-800 g / t of raw ore;

[0119] Optionally, in the zinc-sulfur separation roughing, sulfur scavenging and zinc cleaning processes, the mass of the pH adjuster can be independently 20 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 500 g / t raw ore, 800 g / t raw ore or any value between 20 and 800 g / t raw ore;

[0120] (3) In the zinc-sulfur separation roughing process, the mass of the activator is 10-200 g / t of raw ore;

[0121] Optionally, in the zinc-sulfur separation roughing process, the mass of the activator can be any value between 10 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 150 g / t raw ore, 200 g / t raw ore, or 10-200 g / t raw ore.

[0122] (4) In the zinc-sulfur separation roughing and sulfur scavenging processes, the mass of the collector is 10-200 g / t of raw ore;

[0123] Optionally, during the zinc-sulfur separation roughing and sulfur scavenging processes, the mass of the collector can be independently set to 10 g / t raw ore, 50 g / t raw ore, 100 g / t raw ore, 150 g / t raw ore, 200 g / t raw ore, or any value between 10 and 200 g / t raw ore.

[0124] (5) In the zinc-sulfur separation roughing process, the mass of the frother is 0-20 g / t of raw ore;

[0125] Optionally, in the zinc-sulfur separation roughing process, the mass of the frother can be 0 g / t raw ore, 5 g / t raw ore, 10 g / t raw ore, 15 g / t raw ore, 20 g / t raw ore, or any value between 0 and 20 g / t raw ore;

[0126] (6) The mass of the leaching agent is 50-5000 g / t of raw ore.

[0127] Optionally, the mass of the leaching agent can be 50 g / t raw ore, 100 g / t raw ore, 500 g / t raw ore, 1000 g / t raw ore, 2500 g / t raw ore, 5000 g / t raw ore, or any value between 50 and 5000 g / t raw ore.

[0128] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0129] (1) The pH value of the raw ore slurry is 8-10;

[0130] Optionally, the pH value of the raw ore slurry can be any value between 8, 8.5, 9, 9.5, 10, or 8-10;

[0131] (2) The pH value of the re-grindable rough concentrate is 11-13;

[0132] Optionally, the pH value of the regrinding and other floatable rough concentrate can be any value between 11, 11.5, 12, 12.5, 13, or 11-13;

[0133] (3) The pH value of the zinc-sulfur separation roughing process is 11-13;

[0134] Optionally, the pH value for the zinc-sulfur separation roughing can be 11, 11.5, 12, 12.5, 13 or any value between 11 and 13;

[0135] (4) The selected zinc has a pH value of 11-13.

[0136] Optionally, the pH value of the zinc can be 11, 11.5, 12, 12.5, 13, or any value between 11 and 13.

[0137] In some embodiments, the beneficiation method for copper-zinc associated gold ore satisfies at least one of the following conditions:

[0138] (1) The cyanide-containing lean solution is returned to the zinc-sulfur separation roughing process;

[0139] (2) The recycled carbon obtained from the analysis is returned to the first grinding, the second grinding and carbon leaching.

[0140] The implementation schemes of this application will be described in detail below with reference to specific embodiments. However, those skilled in the art will understand that the following embodiments are only for illustrating this application and should not be regarded as limiting the scope of this application. Unless otherwise specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments used without specified manufacturers are all conventional products that can be purchased commercially.

[0141] Example 1

[0142] This embodiment provides a beneficiation method for copper-zinc associated gold deposits, the process of which is illustrated below. Figure 1 As shown, the specific steps are as follows:

[0143] S1: Lime, sodium sulfide, and recycled carbon are added to a copper-zinc associated gold ore (containing 1.23 g / t of gold, 0.5 wt% of copper, and 0.7 wt% of zinc) for grinding. The pH of the slurry is adjusted to 9. After grinding, 85% of the particles have a fineness ≤74 μm, resulting in a raw ore slurry with a concentration of 33 wt%. Collectors and frothers (pine oil) are added to the raw ore slurry sequentially for two stages of copper-zinc equal-flotation roughing to obtain copper-zinc equal-flotation rough concentrate and copper-zinc equal-flotation roughing tailings. The dosage of reagents added during the grinding process is as follows: 2000 g of lime, 300 g of sodium sulfide, and 100 g of recycled carbon per ton of raw ore. The dosage of reagents for the first equal-flotation roughing is as follows: 40 g of collector and 8 g of pine oil per ton of raw ore. The dosage of reagents for the second equal-flotation roughing is as follows: 20 g of collector and 4 g of pine oil per ton of raw ore.

[0144] Collectors were added to the floatable roughing tailings of copper, zinc, etc., and two equal floatable scavenging processes were carried out to obtain equal floatable scavenged tailings; 10g of collector was added per ton of raw ore for the first equal floatable scavenging process; 5g of collector was added per ton of raw ore for the second equal floatable scavenging process.

[0145] S2: The floatable rough concentrates such as copper and zinc are regrinded. 400g of lime, 200g of sodium sulfide and 80g of recycled carbon are added per ton of floatable rough concentrates for grinding. The pH of the slurry is adjusted to 12. The proportion of particles with a fineness of ≤38μm is 80wt%. 500g of zinc sulfate inhibitor and 250g of sodium sulfite inhibitor are added per ton of raw ore to the regrinded floatable concentrate slurry for copper separation roughing to obtain copper rough concentrate and separation roughing tailings.

[0146] The copper concentrate is separated and refined twice by adding zinc sulfate and sodium sulfite (mass ratio 1:1) as inhibitors to the copper crude concentrate. Specifically, in the first separation and refinement, 200g of zinc sulfate and 100g of sodium sulfite are added per ton of raw ore; in the second separation and refinement, 100g of zinc sulfate and 50g of sodium sulfite are added per ton of raw ore.

[0147] Collector was added to the roughing tailings for two separation and scavenging processes to obtain zinc scavenged concentrate: the collector was ethyl thiocyanate, and 4g of collector was added per ton of raw ore in the first separation and scavenging process; 2g of collector was added per ton of raw ore in the second separation and scavenging process.

[0148] S3: Add 100g of activator copper sulfate, 100g of collector butyl xanthate, and 16g of frother to each ton of raw ore in the zinc and sulfur flotation tailings, and perform a first zinc-sulfur mixed roughing to obtain a first zinc-sulfur roughing concentrate and a first zinc-sulfur roughing tailings; perform a second mixing and cleaning of the first zinc-sulfur roughing concentrate to obtain a zinc-sulfur roughing concentrate.

[0149] Copper sulfate activator and butyl xanthate collector are added sequentially to the zinc-sulfur roughing tailings, and two zinc-sulfur mixed scavenging processes are carried out to obtain the tailings. Specifically: in the first zinc-sulfur scavenging process, 40 g of copper sulfate activator and 30 g of butyl xanthate collector are added per ton of raw ore; in the second zinc-sulfur scavenging process, 20 g of copper sulfate activator and 15 g of butyl xanthate collector are added per ton of raw ore.

[0150] S4: After mixing the zinc scavenging concentrate and the zinc-sulfur concentrate, a zinc-sulfur mixed concentrate is obtained. The regrinded zinc-sulfur mixed concentrate (the proportion of particles with a regrinding fineness ≤38μm in the zinc-sulfur mixed concentrate is 88wt%) is mixed with the following agents: pH adjuster lime (300g per ton of raw ore), activator copper sulfate (40g per ton of raw ore), collector butyl xanthate (40g per ton of raw ore), and frother pine oil (4g per ton of raw ore). The pH of the slurry is adjusted to 12, and a zinc-sulfur separation roughing is performed to obtain zinc rough concentrate and sulfur rough concentrate.

[0151] Adding lime as a pH adjuster to zinc rough concentrate and performing two zinc beneficiation processes yields gold-bearing zinc concentrate. In the first zinc beneficiation, 100g of lime is added per ton of raw ore to adjust the pulp pH to 12. In the second zinc beneficiation, 50g of lime is added per ton of raw ore to adjust the pulp pH to 12. Adding copper sulfate as an activator and butyl xanthate as a collector to sulfur rough concentrate and performing two sulfur scavenging processes yields sulfur concentrate. In the first sulfur scavenging, 25g of copper sulfate and 15g of butyl xanthate are added per ton of raw ore. In the second sulfur scavenging, 15g of copper sulfate and 10g of butyl xanthate are added per ton of raw ore.

[0152] S5: Add 2000g of sodium cyanide and activated carbon per ton of raw ore to the gold-zinc concentrate for leaching to obtain gold-loaded carbon and leaching slurry; filter the leaching slurry to obtain zinc concentrate and cyanide-containing lean liquor; return the cyanide-containing lean liquor to the above steps for recycling; after the gold-loaded carbon is analyzed, the regenerated carbon is returned to the raw ore, while copper, zinc, etc. can be floated, re-ground, and used in the leaching process.

[0153] The stirring speed for the flotation operation in steps 1-5 is 1750 r / min, and the flotation time is 4 min.

[0154] The collector is prepared by mixing ethyl xanthate and ethyl thiocyanate in a weight ratio of 1:4.

[0155] After processing using the beneficiation method provided in Example 1, a copper concentrate with a copper grade of 24.46%, a zinc grade of 1.21%, and a gold grade of 76.76 g / t was finally obtained, with a gold recovery rate of 71.85% and a copper recovery rate of 90.13%; a zinc concentrate with a zinc grade of 46.73% and a zinc recovery rate of 89.20% was obtained; and the total gold beneficiation recovery rate was 93.12%.

[0156] Example 2

[0157] The difference from Example 1 is that the reagents are different. The modifier is replaced with sodium hydrosulfide, the foaming agent is replaced with methyl isobutyl methanol and pine oil in a mass ratio of 1:1, the activator is replaced with copper nitrate, and the leaching agent is replaced with potassium cyanide.

[0158] After processing by the beneficiation method provided in this embodiment, a copper concentrate with a copper grade of 20.33%, a zinc grade of 1.03%, and a gold grade of 64.35 g / t was finally obtained; the gold recovery rate was 73.46% and the copper recovery rate was 91.79%; a zinc concentrate with a zinc grade of 45.41% and a zinc recovery rate of 90.11% was obtained; and the total gold beneficiation recovery rate was 93.69%.

[0159] Example 3

[0160] The difference from Example 1 is that the collector is replaced with thiazolyl thiol, ethyl thiocyanate and butylammonium black powder in a mass ratio of 1.2:1.8:0.5.

[0161] After processing by the beneficiation method provided in this embodiment, a copper concentrate with a copper grade of 24.63%, a zinc grade of 0.91%, and a gold grade of 76.13 g / t was finally obtained; the gold recovery rate was 78.85% and the copper recovery rate was 90.43%; a zinc concentrate with a zinc grade of 46.58% and a zinc recovery rate of 91.84% was obtained; and the total gold beneficiation recovery rate was 94.75%.

[0162] Comparative Example 1

[0163] The difference from Example 1 is that a conventional zinc-suppressing and copper-floating preferential flotation process is used, and the specific steps are as follows:

[0164] S1: A. Add 2000g of lime per ton of copper-zinc ore (same as in Example 1) for grinding, adjust the pH of the slurry to 9, and obtain a gold ore slurry with a fineness ≤74μm of 90%. The concentration of the slurry is 33wt%. Add inhibitor, collector and frother pine oil to the gold ore slurry in sequence, and perform two copper roughing processes to obtain copper rough concentrate and copper roughing tailings. The reagent dosage for the first copper roughing process is: 1000g of zinc sulfate inhibitor, 500g of sodium sulfite, 40g of ethyl thiocyanate and 8g of pine oil per ton of raw ore. The reagent dosage for the second copper roughing process is: 500g of zinc sulfate inhibitor, 300g of sodium sulfite, 20g of ethyl thiocyanate and 4g of pine oil per ton of raw ore.

[0165] S2: Add 2000g of lime per ton of copper rough concentrate and grind to adjust the pH of the slurry to 9. Then regrind the ore, ensuring that the proportion of particles with a fineness ≤38μm is 80wt%. Perform three copper cleaning processes on the regrinded copper rough concentrate to obtain copper concentrate. The reagent dosage for the first copper cleaning process is: 200g of zinc sulfate and 100g of sodium sulfite per ton of raw ore. The reagent dosage for the second copper cleaning process is: 100g of zinc sulfate and 50g of sodium sulfite per ton of raw ore. The reagent dosage for the third copper cleaning process is: 50g of zinc sulfate and 25g of sodium sulfite per ton of raw ore.

[0166] S3: Add a collector to the copper roughing tailings and perform two scavenging processes to obtain copper scavenged tailings; for the first copper scavenging process, add 250g of zinc sulfate, 150g of sodium sulfite and 10g of ethyl thiocyanate per ton of raw ore; for the second mixed scavenging process, add 100g of zinc sulfate, 100g of sodium sulfite and 5g of ethyl thiocyanate per ton.

[0167] S4: Add 4000g of lime as a pH adjuster to adjust the pH value to 12 to each ton of raw ore in the copper scavenging tailings, 100g of copper sulfate as an activator, 100g of butyl xanthate as a collector, and 16g of frother as a frother, and carry out one zinc roughing to obtain zinc rough concentrate and zinc roughing tailings.

[0168] Copper sulfate activator and butyl xanthate collector are added sequentially to the zinc roughing tailings, and two zinc-sulfur mixed scavenging processes are carried out to obtain the tailings. Specifically: in the first zinc-sulfur scavenging process, 40 g of copper sulfate activator and 30 g of butyl xanthate collector are added per ton of raw ore; in the second zinc-sulfur scavenging process, 20 g of copper sulfate activator and 15 g of butyl xanthate collector are added per ton of raw ore.

[0169] S5: Add a pH adjuster to the zinc rough concentrate to adjust the slurry pH to 12, then regrind. The regrinding fineness of the particles ≤38μm accounts for 80wt%. Perform three zinc cleaning processes on the regrinded copper rough concentrate to obtain zinc concentrate. The dosage of the zinc cleaning reagent for the first zinc cleaning process is 300g of lime per ton of raw ore. The dosage of the zinc cleaning reagent for the second zinc cleaning process is 200g of lime per ton of raw ore, adjusting the pH to 12. The dosage of the zinc cleaning reagent for the third zinc cleaning process is 100g of lime per ton of raw ore, adjusting the pH to 12.

[0170] After processing using the beneficiation method provided in the comparative example, a copper concentrate with a grade of 12.61 g / t, a zinc grade of 10.33%, and a gold grade of 50.24 g / t was finally obtained, with a gold recovery rate of 68.24% and a copper recovery rate of 88.73%; and a zinc concentrate with a zinc grade of 46.44% and a zinc recovery rate of 70.10% was also obtained.

[0171] Comparative Example 2

[0172] This comparative example uses the same beneficiation method as Comparative Example 1 for copper-zinc associated gold ore, and the results are as follows:

[0173] The final yield was a copper concentrate with a grade of 12.46 g / t, a zinc grade of 10.42%, and a gold grade of 50.76 g / t, with a gold recovery rate of 68.85% and a copper recovery rate of 89.13%; a zinc concentrate with a zinc grade of 46.44% and a zinc recovery rate of 70.10%; and a total gold beneficiation recovery rate of 79.73%.

[0174] Comparative Example 3

[0175] The difference from Example 1 is that no modifier is added.

[0176] After processing using the beneficiation method provided in the comparative example, a copper concentrate with a grade of 13.07 g / t, a zinc grade of 7.12%, and a gold grade of 48.73 g / t was finally obtained, with a gold recovery rate of 69.56% and a copper recovery rate of 90.41%; a zinc concentrate with a zinc grade of 45.11% and a zinc recovery rate of 73.34% was also obtained; and the total gold beneficiation recovery rate was 92.82%.

[0177] Comparative Example 4

[0178] The difference from Example 1 is that no recycled carbon is added.

[0179] After processing using the beneficiation method provided in the comparative example, a copper concentrate with a grade of 12.17 g / t, a zinc grade of 8.42%, and a gold grade of 43.62 g / t was finally obtained, with a gold recovery rate of 70.03% and a copper recovery rate of 90.35%; a zinc concentrate with a zinc grade of 46.21% and a zinc recovery rate of 75.74% was also obtained; and the total gold beneficiation recovery rate was 93.01%.

[0180] Comparative Example 5

[0181] The difference from Example 1 is that no recycled carbon or modifier is added.

[0182] After processing using the beneficiation method provided in the comparative example, a copper concentrate with a grade of 11.04 g / t, a zinc grade of 10.74%, and a gold grade of 47.95 g / t was finally obtained, with a gold recovery rate of 71.73% and a copper recovery rate of 90.81%; a zinc concentrate with a zinc grade of 45.16% and a zinc recovery rate of 71.25% was also obtained; and the total gold beneficiation recovery rate was 92.88%.

[0183] analyze:

[0184] The above tests show that:

[0185] 1. Without the addition of modifiers, the reagents are not completely resolved, which affects the adsorption of zinc inhibitors on the surface of zinc minerals, resulting in poor copper-zinc separation and a high zinc content in the copper concentrate.

[0186] 2. Without adding recycled carbon, the reagents are re-adsorbed onto the mineral surface after desorption, affecting the zinc-copper-zinc separation effect, resulting in a higher zinc content in the copper concentrate.

[0187] The combined reagents in the 3 examples are highly selective and can further reduce the zinc content in copper concentrate, while enhancing the recovery of gold in copper concentrate, which is beneficial to improving the gold and zinc indicators.

[0188] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0189] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments can be used in any combination. The information disclosed in this background section is intended only to enhance the understanding of the general background of this application and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

Claims

1. A beneficiation method for copper-zinc associated gold deposits, characterized in that, include: Copper-zinc associated gold ore, pH adjuster, regenerated carbon and adjuster are mixed, firstly ground, and pulped to obtain raw ore slurry; the raw ore slurry, collector and frother are mixed and copper-zinc and other floatable roughing is carried out to obtain copper-zinc and other floatable rough concentrate and copper-zinc and other floatable roughing tailings; The equal floatable rough concentrate, recycled carbon, and modifier are mixed and then ground a second time to obtain a refractory equal floatable rough concentrate. The refractory equal floatable rough concentrate and depressant are mixed and then subjected to copper separation roughing to obtain a copper rough concentrate and separation roughing tailings. The copper rough concentrate and depressant are mixed and then subjected to copper separation cleaning to obtain a copper concentrate. The separation roughing tailings and collector are mixed and then subjected to copper separation scavenging to obtain a zinc scavenging concentrate. The copper-zinc and other floatable roughing tailings, activator, collector and frother are mixed and subjected to zinc-sulfur mixed roughing to obtain zinc-sulfur roughing concentrate and zinc-sulfur roughing tailings; the zinc-sulfur roughing concentrate is subjected to zinc-sulfur fine cleaning to obtain zinc-sulfur concentrate; the zinc-sulfur roughing tailings, activator and collector are mixed and subjected to zinc-sulfur scavenging to obtain zinc-sulfur tailings. The zinc scavenging concentrate and zinc-sulfur concentrate are mixed and subjected to a third grinding process to obtain a zinc-sulfur mixed concentrate. The zinc-sulfur mixed concentrate, pH adjuster, activator, collector, and frother are mixed and subjected to zinc-sulfur separation roughing to obtain zinc rough concentrate and sulfur rough concentrate. The sulfur rough concentrate, activator, and collector are mixed and subjected to sulfur scavenging to obtain sulfur concentrate. The zinc crude concentrate and pH adjuster are subjected to zinc beneficiation to obtain gold-bearing zinc concentrate. The gold-bearing zinc concentrate, leaching agent and activated carbon are mixed and carbon-leached to obtain leaching slurry and gold-loaded carbon. The leaching slurry is pressure filtered to obtain zinc concentrate and cyanide-containing lean liquor. The gold-loaded carbon is desorbed to obtain regenerated carbon and precious liquor. The gold grade in the copper-zinc associated gold deposit is ≥1 g / t, the copper grade is greater than 0.4%, and the zinc grade is greater than 0.4%. The modifier is sodium sulfide and / or sodium hydrosulfide.

2. The beneficiation method for copper-zinc associated gold deposits according to claim 1, characterized in that, At least one of the following conditions must be met: (1) The pH adjuster includes one or more of lime, sodium hydroxide, sodium humate and calcium chloride; (2) The collector includes one or more of ethyl xanthate, thiazolyl xanthate, isopropyl xanthate, ethyl thiocyanate, phenylammonium black, butylammonium black and ethyl thiocyanate; (3) The foaming agent includes one or more of methyl isobutyl methanol, pine oil, pine alcohol oil and butyl ether alcohol.

3. The beneficiation method for copper-zinc associated gold deposits according to claim 1, characterized in that, At least one of the following conditions must be met: (1) The inhibitor comprises zinc sulfate, sodium sulfide and calcium chloride; the mass ratio of zinc sulfate, sodium sulfide and calcium chloride is 1.5-2.5:1-1.5:0.5-1; (2) The activator includes one or more of copper sulfate, copper nitrate and lead nitrate; (3) The leaching agent includes sodium cyanide and / or potassium cyanide.

4. The beneficiation method for copper-zinc associated gold deposits according to claim 1, characterized in that, At least one of the following conditions must be met: (1) In the first grinding process, the mass of the pH adjuster is 50-3000 g / t of raw ore; (2) In the first grinding process, the mass of the modifier is 20-2000 g / t of raw ore; (3) In the first grinding process, the mass of the recycled carbon is 10-500 g / t of raw ore; (4) The mass percentage of the raw ore slurry with a fineness of less than 74 μm is 60-90%; (5) In the roughing process of copper, zinc and other floatable materials, the mass of the collector is 20-200 g / t of raw ore; (6) In the roughing process of copper, zinc and other floatable materials, the mass of the frother is 4-40 g / t of raw ore.

5. The beneficiation method for copper-zinc associated gold deposits according to claim 1, characterized in that, At least one of the following conditions must be met: (1) In the second grinding process, the mass of the pH adjuster is 50-800 g / t of raw ore; (2) In the second grinding process, the mass of the recycled carbon is 10-500 g / t of raw ore; (3) In the second grinding process, the mass of the modifier is 20-2000 g / t of raw ore; (4) The mass percentage of the regrinded and other floatable rough concentrate with a fineness of less than 38 μm is 70-90%; (5) In the copper separation roughing and copper separation cleaning processes, the mass of the inhibitor is independently 20-800 g / t of raw ore; (6) In the copper separation and scavenging process, the mass of the collector is 0-20 g / t of raw ore.

6. The beneficiation method for copper-zinc associated gold deposits according to claim 1, characterized in that, At least one of the following conditions must be met: (1) In the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the activator is 20-200 g / t of raw ore; (2) In the zinc-sulfur mixed roughing and zinc-sulfur scavenging processes, the mass of the collector is 20-200 g / t of raw ore; (3) In the zinc-sulfur mixed roughing process, the mass of the frother is 0-30 g / t of raw ore.

7. The beneficiation method for copper-zinc associated gold deposits according to claim 1, characterized in that, At least one of the following conditions must be met: (1) The zinc-sulfur mixed concentrate has a fineness of less than 38 μm, accounting for 80-95% by mass; (2) In the zinc-sulfur separation roughing, sulfur scavenging and zinc cleaning processes, the mass of the pH adjuster is 20-800 g / t of raw ore; (3) In the zinc-sulfur separation roughing process, the mass of the activator is 10-200 g / t of raw ore; (4) In the zinc-sulfur separation roughing and sulfur scavenging processes, the mass of the collector is 10-200 g / t of raw ore; (5) In the zinc-sulfur separation roughing process, the mass of the frother is 0-20 g / t of raw ore; (6) The mass of the leaching agent is 50-5000 g / t of raw ore.

8. The beneficiation method for copper-zinc associated gold deposits according to claim 1, characterized in that, At least one of the following conditions must be met: (1) The pH value of the raw ore slurry is 8-10; (2) The pH value of the re-grindable rough concentrate is 11-13; (3) The pH value of the zinc-sulfur separation roughing process is 11-13; (4) The selected zinc has a pH value of 11-13.

9. The beneficiation method for copper-zinc associated gold deposits according to any one of claims 1-8, characterized in that, At least one of the following conditions must be met: (1) The cyanide-containing lean solution is returned to the zinc-sulfur separation roughing process; (2) The recycled carbon obtained from the analysis is returned to the first grinding, the second grinding and carbon leaching.

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