A method of beneficiation of a sulphur associated zinc ore

Abstract

This application provides a beneficiation method for sulfur-associated zinc ore, relating to the field of mining and metallurgy. The raw sulfur-associated zinc ore is first ground and then pulped to obtain a slurry. The slurry undergoes a first sulfur roughing process to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings. The first sulfur roughing concentrate is then subjected to a second grinding process followed by a first sulfur cleaning process to obtain a first sulfur concentrate. The first sulfur roughing tailings undergo a second sulfur roughing process to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings. The second sulfur roughing concentrate undergoes a second sulfur cleaning process to obtain a second sulfur concentrate. The second sulfur roughing tailings undergo sulfur scavenging to obtain sulfur scavenging tailings. The sulfur scavenging tailings undergo sulfur-zinc roughing to obtain a sulfur-zinc rough concentrate and sulfur-zinc rough tailings. The sulfur-zinc rough concentrate undergoes a sulfur-zinc mixed cleaning process to obtain a sulfur-zinc mixed concentrate. The sulfur-zinc mixed concentrate undergoes magnetic separation to obtain a third sulfur concentrate and a zinc concentrate.

Description

Technical Field

[0001] This application relates to the field of mining and metallurgy, and in particular to a beneficiation method for sulfur-associated zinc ore. Background Technology

[0002] High-grade sulfur-associated zinc ores often contain minerals such as pyrite, pyrrhotite, and sphalerite. Due to the high sulfur content and the wide range of floatability of sulfur minerals, the recovery of associated zinc is quite difficult.

[0003] Because sulfur minerals have similar floatability to the target minerals, it is often necessary to suppress sulfur-containing minerals to preferentially float the target minerals. For high-grade sulfur-associated zinc ores, usually only the sulfur minerals are recovered, or a process of preferential zinc flotation and sulfur-zinc mixed flotation followed by separation is used. If only sulfur minerals are recovered from the ore, it not only wastes resources but also affects the company's profitability. If a process of preferential zinc flotation and sulfur-zinc mixed flotation followed by separation is used to recover zinc, a large amount of sulfur inhibitor must be added to the process, resulting in high production costs, unstable process, and the presence of highly floatable sulfur minerals in the zinc concentrate, leading to low-grade zinc concentrate and failure to obtain qualified products.

[0004] For ores that primarily recover sulfur minerals, since their value mainly lies in the iron they contain, how to refine the sorting process, reduce production costs, improve product quality, increase product added value, and recover as many associated valuable elements as possible are the main problems that enterprises need to solve at present. Summary of the Invention

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

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a method for beneficiating sulfur-associated zinc ore, comprising:

[0008] The raw zinc ore with sulfur association is first ground and then pulped to obtain a slurry. The slurry is then subjected to a first sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings.

[0009] The first sulfur roughing concentrate is subjected to a second grinding process followed by a first sulfur cleaning process to obtain a first sulfur concentrate; the first sulfur roughing tailings are subjected to a second sulfur roughing process to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings; the second sulfur roughing concentrate is subjected to a second cleaning process to obtain a second sulfur concentrate; the second sulfur roughing tailings are subjected to sulfur scavenging to obtain sulfur scavenging tailings.

[0010] The sulfur scavenging tailings are subjected to sulfur-zinc roughing to obtain sulfur-zinc rough concentrate and sulfur-zinc rough tailings; the sulfur-zinc rough concentrate is subjected to sulfur-zinc mixed cleaning to obtain sulfur-zinc mixed concentrate; the sulfur-zinc mixed concentrate is subjected to magnetic separation to obtain third sulfur concentrate and zinc concentrate.

[0011] Optionally, the sulfur grade in the sulfur-associated zinc ore is not less than 28%, and the zinc grade is not less than 0.3%.

[0012] Optionally, after the first grinding, the fineness of the sulfur-associated zinc ore is 65-85 wt%, and the particle size of the sulfur-associated zinc ore does not exceed 74 μm.

[0013] Optionally, during the first sulfur roughing process, a first sulfuric acid, a selective sulfur collector, and a first frother are added sequentially to the slurry.

[0014] Optionally, the concentration of the first sulfuric acid is 10-30 wt%, and the dosage is 1000-4000 grams per ton of sulfur-associated zinc ore.

[0015] Optionally, the selective sulfur collector includes at least one of ethyl xanthate and ethyl xanthate, and is used at a dosage of 40-200 grams per ton of sulfur-associated zinc ore.

[0016] Optionally, the first foaming agent includes at least one of methyl isobutyl methanol, pine oil, pine alcohol oil, alcohols, and butyl ether alcohol, and is used in an amount of 4-40 grams per ton of sulfur-associated zinc ore.

[0017] Optionally, after the second grinding, the fineness of the first sulfur roughing concentrate is 80-95 wt%, and the particle size of the first sulfur roughing concentrate does not exceed 38 μm.

[0018] Optionally, during the second sulfur roughing process, a second sulfuric acid, a first sulfur collector, and a second frother are sequentially added to the tailings from the first sulfur roughing process, and the sulfur roughing process is performed at least once.

[0019] Optionally, the concentration of the second sulfuric acid is 10-30 wt%, and the dosage is 500-2000 grams per ton of sulfur-associated zinc ore.

[0020] Optionally, the first sulfur collector includes at least one of ethyl xanthate, ethyl xanthate, and butyl xanthate, and is used at a dosage of 5-120 grams per ton of sulfur-associated zinc ore.

[0021] Optionally, the second foaming agent includes at least one of methyl isobutyl methanol, pine oil, pine alcohol oil, alcohols, and butyl ether alcohol, and is used in an amount of 4-40 grams per ton of sulfur-associated zinc ore.

[0022] Optionally, during the sulfur scavenging process, a third sulfuric acid and a second sulfur collector are added sequentially to the second sulfur roughing tailings.

[0023] Optionally, the concentration of the third sulfuric acid is 10-30 wt%, and the dosage is 200-1000 grams per ton of sulfur-associated zinc ore.

[0024] Optionally, the second sulfur collector includes at least one of ethyl xanthate, ethyl xanthate, and butyl xanthate, and is used at a dosage of 5-120 grams per ton of sulfur-associated zinc ore.

[0025] Optionally, during the sulfur-zinc roughing process, an activator and a sulfur-zinc collector are added sequentially to the sulfur scavenging tailings, and the sulfur-zinc roughing process is performed at least once.

[0026] Optionally, the activator includes at least one of copper sulfate, copper nitrate, and lead nitrate, and is used at a dosage of 20-500 grams per ton of sulfur-associated zinc ore.

[0027] Optionally, the sulfur-zinc collector includes at least one of isopropyl xanthate, butyl xanthate, and isopentyl xanthate, and is used at a dosage of 20-100 grams per ton of sulfur-associated zinc ore.

[0028] Optionally, the sulfur grade in the first sulfur concentrate is greater than 52.8%.

[0029] Optionally, the sulfur grade in the second sulfur concentrate is 44.0-48.0%.

[0030] Optionally, the sulfur grade in the third sulfur concentrate is greater than 34%.

[0031] Optionally, high-grade iron concentrate products are obtained by roasting the first sulfur concentrate, the second sulfur concentrate, and the third sulfur concentrate. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid.

[0032] Compared with the prior art, the beneficial effects of this application include:

[0033] By employing stepwise flotation of sulfur, sulfur products of varying qualities were obtained, increasing the added value of the products. Different reagent regimes were used to address the flotation characteristics of different sulfur-containing minerals, reducing reagent costs. The main flotation process prioritized the selection of sulfur, which has better floatability, avoiding the need for large amounts of sulfur inhibitors in the priority selection of zinc, and improving the quality of zinc feed. Subsequently, pyrrhotite, which has poor floatability, and associated zinc minerals were recovered. Magnetic separation was then used to achieve efficient separation of zinc concentrate, avoiding the use of lime, an environmental inhibitor in acid flotation, reducing production costs, achieving comprehensive resource utilization, avoiding environmental pollution, and contributing to cost reduction and efficiency improvement for enterprises. Attached Figure Description

[0034] 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.

[0035] Figure 1 This is a schematic flowchart of the beneficiation method for sulfur-associated zinc ore provided in the example. Detailed Implementation

[0036] As used in this article:

[0037] "Prepared from" is synonymous with "comprising". The terms "comprising", "including", "having", "containing", or any other variations thereof as used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0038] The conjunction "composed of..." excludes any unspecified elements, steps, or components. If used in a claim, this phrase makes the claim closed, excluding materials other than those described, except for associated conventional impurities. When the phrase "composed of..." appears in a clause of the body of a claim rather than immediately following it, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0039] When a quantity, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1–5” is disclosed, the described range should be interpreted as including ranges “1–4”, “1–3”, “1–2”, “1–2 and 4–5”, “1–3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0040] In these embodiments, unless otherwise specified, the portions and percentages are all by weight.

[0041] "Parts by mass" refers to the basic unit of measurement that expresses the mass ratio of multiple components. One part can represent any unit mass, such as 1g or 2.689g. If we say that component A has "a" parts by mass and component B has "b" parts by mass, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it can mean that the mass of component A is aK and the mass of component B is bK (K is any number representing a multiplier). It is important to understand that, unlike the number of parts by mass, the sum of the mass parts of all components is not limited to 100 parts.

[0042] "And / or" is used to indicate that one or both of the described situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0043] To better explain the technical solution provided in this application, the technical solution will be described in its entirety before the embodiments.

[0044] This application provides a method for beneficiating sulfur-associated zinc ore, comprising:

[0045] The raw zinc ore with sulfur association is first ground and then pulped to obtain a slurry. The slurry is then subjected to a first sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings.

[0046] The first sulfur roughing concentrate is subjected to a second grinding process followed by a first sulfur cleaning process to obtain a first sulfur concentrate; the sulfur roughing tailings are subjected to a second sulfur roughing process to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings; the second sulfur roughing concentrate is subjected to a second cleaning process to obtain a second sulfur concentrate; the second sulfur roughing tailings are subjected to sulfur scavenging to obtain sulfur scavenging tailings.

[0047] The sulfur scavenging tailings are subjected to sulfur-zinc roughing to obtain sulfur-zinc rough concentrate and sulfur-zinc rough tailings; the sulfur-zinc rough concentrate is subjected to sulfur-zinc mixed cleaning to obtain sulfur-zinc mixed concentrate; the sulfur-zinc mixed concentrate is subjected to magnetic separation to obtain third sulfur concentrate and zinc concentrate.

[0048] In one optional embodiment, the sulfur-associated zinc ore has a sulfur grade of not less than 28% and a zinc grade of not less than 0.3%. The sulfur is mainly found in pyrite, with some found in pyrrhotite, and the zinc is mainly found in sphalerite.

[0049] In an optional embodiment, after the first grinding, the fineness of the sulfur-associated zinc ore is 65-85 wt%, and the particle size of the sulfur-associated zinc ore does not exceed 74 μm.

[0050] Optionally, the fineness of the sulfur-associated zinc ore after the first grinding process can be 65-85 wt% of the particle size of the sulfur-associated zinc ore, which can be 74 μm, 73 μm, 72 μm, 71 μm, 70 μm, 69 μm, 68 μm, 67 μm, 66 μm, 65 μm, 64 μm, 63 μm, 62 μm, 61 μm, 60 μm, 59 μm, 58 μm, 57 μm, 56 μm, 55 μm, 54 μm, 53 μm, 52 μm, 51 μm, or 50 μm, or any value of the sulfur-associated zinc ore with a particle size not exceeding 74 μm for 65-85 wt% of the raw ore.

[0051] In an optional embodiment, during the first sulfur roughing process, a first sulfuric acid, a selective sulfur collector, and a first frother are sequentially added to the slurry.

[0052] In one optional embodiment, the concentration of the first sulfuric acid is 10-30 wt%, and the dosage is 1000-4000 grams per ton of sulfur-associated zinc ore.

[0053] Optionally, the concentration of the first sulfuric acid can be 10wt%, 11wt%, 12wt%, 13wt%, 14wt%, 15wt%, 16wt%, 17wt%, 18wt%, 19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, or any value between 10wt% and 30wt%. Optionally, the amount of the first sulfuric acid can be 1000 grams per ton of sulfur-associated zinc ore, 1500 grams per ton of sulfur-associated zinc ore, 2000 grams per ton of sulfur-associated zinc ore, 2500 grams per ton of sulfur-associated zinc ore, 3000 grams per ton of sulfur-associated zinc ore, 3500 grams per ton of sulfur-associated zinc ore, 4000 grams per ton of sulfur-associated zinc ore, or any value between 1000 and 4000 grams per ton of sulfur-associated zinc ore.

[0054] In one optional embodiment, the selective sulfur collector includes at least one of ethyl xanthate and ethyl xanthate, and is used at a dosage of 40-200 grams per ton of sulfur-associated zinc ore.

[0055] Optionally, the dosage of the selective sulfur collector can be 40 grams per ton of sulfur-associated zinc ore, 50 grams per ton of sulfur-associated zinc ore, 60 grams per ton of sulfur-associated zinc ore, 70 grams per ton of sulfur-associated zinc ore, 80 grams per ton of sulfur-associated zinc ore, 90 grams per ton of sulfur-associated zinc ore, 100 grams per ton of sulfur-associated zinc ore, 110 grams per ton of sulfur-associated zinc ore, or 120 grams per ton of sulfur-associated zinc ore. 130 grams per ton of sulfur-associated zinc ore, 140 grams per ton of sulfur-associated zinc ore, 150 grams per ton of sulfur-associated zinc ore, 160 grams per ton of sulfur-associated zinc ore, 170 grams per ton of sulfur-associated zinc ore, 180 grams per ton of sulfur-associated zinc ore, 190 grams per ton of sulfur-associated zinc ore, 200 grams per ton of sulfur-associated zinc ore, or any value between 40 and 200 grams per ton of sulfur-associated zinc ore.

[0056] In an optional embodiment, the first foaming agent includes at least one of methyl isobutyl methanol, pine oil, pine alcohol oil, alcohols, and butyl ether alcohol, and is used in an amount of 4-40 grams per ton of sulfur-associated zinc ore.

[0057] Optionally, the amount of the first foaming agent can be 4 grams per ton of sulfur-associated zinc ore, 5 grams per ton of sulfur-associated zinc ore, 10 grams per ton of sulfur-associated zinc ore, 15 grams per ton of sulfur-associated zinc ore, 20 grams per ton of sulfur-associated zinc ore, 25 grams per ton of sulfur-associated zinc ore, 30 grams per ton of sulfur-associated zinc ore, 35 grams per ton of sulfur-associated zinc ore, 40 grams per ton of sulfur-associated zinc ore, or any value between 4 and 40 grams per ton of sulfur-associated zinc ore.

[0058] In an optional embodiment, after the second grinding, the fineness of the first sulfur roughing concentrate is 80-95 wt%, and the particle size of the first sulfur roughing concentrate does not exceed 38 μm.

[0059] Optionally, the particle size of the first sulfur roughing concentrate with a fineness of 80-95 wt% after the second grinding of the sulfur-associated zinc ore can be 38 μm, 37 μm, 36 μm, 35 μm, 34 μm, 33 μm, 32 μm, 31 μm, 30 μm, 29 μm, 28 μm, 27 μm, 26 μm, 25 μm, 24 μm, 23 μm, 22 μm, 21 μm, or 20 μm, or any value of the first sulfur roughing concentrate with a particle size not exceeding 38 μm.

[0060] In an optional embodiment, during the second sulfur roughing process, a second sulfuric acid, a first sulfur collector, and a second frother are sequentially added to the tailings from the first sulfur roughing process, and the sulfur roughing process is performed at least once.

[0061] In one optional embodiment, the concentration of the second sulfuric acid is grams per ton of associated zinc ore, and the dosage is 500-2000 grams per ton of associated zinc ore. Optionally, the concentration of the second sulfuric acid can be any value between 10% and 30% by mass; the dosage of the second sulfuric acid can be 500 grams per ton of associated zinc ore, 600 grams per ton of associated zinc ore, 700 grams per ton of associated zinc ore, 800 grams per ton of associated zinc ore, 900 grams per ton of associated zinc ore, 1000 grams per ton of associated zinc ore, 1100 grams per ton of associated zinc ore, or 1200 grams per ton of associated zinc ore. Zinc ore, 1300 grams per ton of sulfur-associated zinc ore, 1400 grams per ton of sulfur-associated zinc ore, 1500 grams per ton of sulfur-associated zinc ore, 1600 grams per ton of sulfur-associated zinc ore, 1700 grams per ton of sulfur-associated zinc ore, 1800 grams per ton of sulfur-associated zinc ore, 1900 grams per ton of sulfur-associated zinc ore, 2000 grams per ton of sulfur-associated zinc ore, or any value between 500 and 2000 grams per ton of sulfur-associated zinc ore.

[0062] In one alternative embodiment, the first sulfur collector includes at least one of ethyl xanthate, ethyl xanthate, and butyl xanthate, used in an amount of 5-120 grams per ton of sulfur-associated zinc ore.

[0063] Optionally, the dosage of the first sulfur collector can be 5 grams per ton of sulfur-associated zinc ore, 10 grams per ton of sulfur-associated zinc ore, 20 grams per ton of sulfur-associated zinc ore, 30 grams per ton of sulfur-associated zinc ore, 40 grams per ton of sulfur-associated zinc ore, 50 grams per ton of sulfur-associated zinc ore, 60 grams per ton of sulfur-associated zinc ore, 70 grams per ton of sulfur-associated zinc ore, 80 grams per ton of sulfur-associated zinc ore, 90 grams per ton of sulfur-associated zinc ore, 100 grams per ton of sulfur-associated zinc ore, 110 grams per ton of sulfur-associated zinc ore, 120 grams per ton of sulfur-associated zinc ore, or any value between 5 and 120 grams per ton of sulfur-associated zinc ore.

[0064] In one optional embodiment, the second foaming agent comprises at least one of methyl isobutyl methanol, pine oil, pine alcohol oil, alcohols, and butyl ether alcohol, and is used in an amount of 4-40 grams per ton of sulfur-associated zinc ore.

[0065] Optionally, the amount of the second foaming agent can be 4 grams per ton of sulfur-associated zinc ore, 9 grams per ton of sulfur-associated zinc ore, 14 grams per ton of sulfur-associated zinc ore, 19 grams per ton of sulfur-associated zinc ore, 24 grams per ton of sulfur-associated zinc ore, 29 grams per ton of sulfur-associated zinc ore, 34 grams per ton of sulfur-associated zinc ore, 39 grams per ton of sulfur-associated zinc ore, 40 grams per ton of sulfur-associated zinc ore, or any value between 4 and 40 grams per ton of sulfur-associated zinc ore.

[0066] In an optional embodiment, during the sulfur scavenging process, a third sulfuric acid and a second sulfur collector are sequentially added to the second sulfur roughing tailings.

[0067] In one optional embodiment, the concentration of the third sulfuric acid is 10%-30% by mass, and the dosage is 200-1000 grams per ton of sulfur-associated zinc ore.

[0068] Optionally, the concentration of the third sulfuric acid can be any value between 10% and 30% by mass; the amount of the third sulfuric acid can be 200 grams per ton of sulfur-associated zinc ore, 300 grams per ton of sulfur-associated zinc ore, 400 grams per ton of sulfur-associated zinc ore, 500 grams per ton of sulfur-associated zinc ore, 600 grams per ton of sulfur-associated zinc ore, 700 grams per ton of sulfur-associated zinc ore, 800 grams per ton of sulfur-associated zinc ore, 900 grams per ton of sulfur-associated zinc ore, 1000 grams per ton of sulfur-associated zinc ore, or any value between 200 and 1000 grams per ton of sulfur-associated zinc ore.

[0069] In one optional embodiment, the second sulfur collector includes at least one of ethyl xanthate, ethyl xanthate, and butyl xanthate, and is used at a dosage of 5-120 grams per ton of sulfur-associated zinc ore.

[0070] Optionally, the dosage of the second sulfur collector can be 5 grams per ton of sulfur-associated zinc ore, 10 grams per ton of sulfur-associated zinc ore, 20 grams per ton of sulfur-associated zinc ore, 30 grams per ton of sulfur-associated zinc ore, 40 grams per ton of sulfur-associated zinc ore, 50 grams per ton of sulfur-associated zinc ore, 60 grams per ton of sulfur-associated zinc ore, 70 grams per ton of sulfur-associated zinc ore, 80 grams per ton of sulfur-associated zinc ore, 90 grams per ton of sulfur-associated zinc ore, 100 grams per ton of sulfur-associated zinc ore, 110 grams per ton of sulfur-associated zinc ore, 120 grams per ton of sulfur-associated zinc ore, or any value between 5 and 120 grams per ton of sulfur-associated zinc ore.

[0071] In one optional implementation, during the sulfur-zinc roughing process, an activator and a zinc matte collector are added sequentially to the sulfur scavenging tailings, and the matte-zinc roughing process is performed at least once.

[0072] In one optional embodiment, the activator includes at least one of copper sulfate, copper nitrate, and lead nitrate, and is used in an amount of 20-500 grams per ton of sulfur-associated zinc ore.

[0073] Optionally, the dosage of the activator can be: 20 grams per ton of sulfur-associated zinc ore, 30 grams per ton of sulfur-associated zinc ore, 40 grams per ton of sulfur-associated zinc ore, 50 grams per ton of sulfur-associated zinc ore, 60 grams per ton of sulfur-associated zinc ore, 70 grams per ton of sulfur-associated zinc ore, 80 grams per ton of sulfur-associated zinc ore, 90 grams per ton of sulfur-associated zinc ore, 100 grams per ton of sulfur-associated zinc ore, or 130 grams per ton of sulfur-associated zinc ore. Zinc ore, 160 grams per ton of sulfur-associated zinc ore, 190 grams per ton of sulfur-associated zinc ore, 250 grams per ton of sulfur-associated zinc ore, 300 grams per ton of sulfur-associated zinc ore, 350 grams per ton of sulfur-associated zinc ore, 400 grams per ton of sulfur-associated zinc ore, 450 grams per ton of sulfur-associated zinc ore, 500 grams per ton of sulfur-associated zinc ore, or any value between 20 and 500 grams per ton of sulfur-associated zinc ore.

[0074] In one alternative embodiment, the sulfur-zinc collector includes at least one of isopropyl xanthate, butyl xanthate, and isopentyl xanthate, used at a dosage of 20-100 grams per ton of sulfur-associated zinc ore.

[0075] Optionally, the amount of the sulfur-zinc collector can be 20 grams per ton of sulfur-associated zinc ore, 30 grams per ton of sulfur-associated zinc ore, 40 grams per ton of sulfur-associated zinc ore, 50 grams per ton of sulfur-associated zinc ore, 60 grams per ton of sulfur-associated zinc ore, 70 grams per ton of sulfur-associated zinc ore, 80 grams per ton of sulfur-associated zinc ore, 90 grams per ton of sulfur-associated zinc ore, 100 grams per ton of sulfur-associated zinc ore, or any value between 20 and 100 grams per ton of sulfur-associated zinc ore.

[0076] In an optional implementation, the sulfur grade in the first sulfur concentrate is greater than 52.8%.

[0077] In an optional embodiment, the sulfur grade in the second sulfur concentrate is 44.0-48.0%.

[0078] In an optional embodiment, the sulfur grade in the third sulfur concentrate is greater than 34%.

[0079] Optionally, high-grade iron concentrate products are obtained by roasting the first sulfur concentrate, the second sulfur concentrate, and the third sulfur concentrate. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid.

[0080] It is understood that the beneficiation method for high-grade sulfur-associated zinc provided in this application is particularly suitable for ores with high sulfur content, diverse occurrence states, significant differences in the floatability of sulfur minerals, and associated low-grade zinc. After grinding the ore, the present invention performs a first-round sulfur roughing process on the slurry using first sulfuric acid, a selective collector, and a frother. The first sulfur roughing concentrate is then regrinded and further refined to obtain a first sulfur concentrate. The sulfur in the first sulfur concentrate is present in pyrite, with a sulfur grade greater than 52.8%. Roasting yields high-quality iron oxides. Due to its low impurity content, it can be further processed to obtain high-value-added coating materials and other products. The sulfur-containing flue gas generated after roasting can also be recovered through an acid production system to produce sulfuric acid, which is then reused in the roughing process, thus avoiding environmental pollution.

[0081] The tailings from the second sulfur roughing process are added to the second sulfuric acid and collector for sulfur roughing. The resulting second sulfur rough concentrate is then further refined by the second sulfur cleaning process to obtain the second sulfur concentrate. The sulfur in the second sulfur concentrate is present in pyrite, but the sulfur is finely distributed and the distribution relationship is complex. Therefore, the sulfur grade in the second sulfur concentrate is lower than that in the first sulfur concentrate, with a sulfur grade of 44.0%-48.0%. After roasting, a high-grade iron concentrate product can be obtained. The sulfur-containing flue gas generated after roasting can also be used to generate sulfuric acid through the acid production system and reused in the flotation process.

[0082] The sulfur scavenging tailings are added to an activator and a zinc-sulfur collector for mixed flotation of zinc and sulfur. The resulting sulfur-zinc rough concentrate is then subjected to magnetic separation to achieve efficient separation of zinc and sulfur, yielding a third sulfur concentrate and a zinc concentrate. The sulfur in the third sulfur concentrate is contained in pyrrhotite, with a sulfur grade greater than 34.0%. The third sulfur concentrate is merged into the second sulfur concentrate for roasting to recover iron, and the resulting acid is reused in the flotation process. Since the yield of the third sulfur concentrate is smaller than that of the second sulfur concentrate, the merging process has little impact on the grade of the iron concentrate product.

[0083] 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.

[0084] The sulfur-associated zinc ore used in each embodiment and comparative example contains 29.74% sulfur and 0.38% zinc, calculated based on 100% of the ore's own mass.

[0085] Example 1

[0086] This embodiment provides a beneficiation method for sulfur-associated zinc ore, the beneficiation process as follows: Figure 1 As shown, the details are as follows:

[0087] (1) Grind the sulfur-associated zinc ore to a fineness of 65% of the particles below 74μm and mix it with water to obtain a slurry.

[0088] (2) Add 4000g of sulfur-associated zinc ore per ton, 40g of ethyl xanthate per ton of sulfur-associated zinc ore, 20g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 12g of pine oil per ton of sulfur-associated zinc ore to the slurry in sequence. After sulfur roughing, the first sulfur roughing concentrate and the first sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 30%.

[0089] (3) The first sulfur roughing concentrate is ground, and the fineness of the grinding is 90% of the particles below 38μm. After sulfur beneficiation, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 52.9%.

[0090] (4) Add 500g of sulfuric acid per ton of sulfur-associated zinc ore, 80g of butyl xanthate per ton of sulfur-associated zinc ore, 40g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 4g of pine oil per ton of sulfur-associated zinc ore to the first sulfur roughing tailings in sequence. After one sulfur roughing, the second sulfur roughing concentrate and the second sulfur roughing tailings are obtained. After sulfur refining of the second sulfur roughing concentrate, the second sulfur concentrate is obtained. The grade of the second sulfur concentrate is 47.6%.

[0091] (5) Add 250 g of sulfuric acid per ton of sulfur-associated zinc ore, 40 g of butyl xanthate per ton of sulfur-associated zinc ore, and 20 g of ethyl nitrogen per ton of sulfur-associated zinc ore to the second sulfur roughing tailings in sequence, and obtain sulfur scavenging tailings after sulfur scavenging.

[0092] (6) Add 50 grams of copper sulfate per ton of sulfur-associated zinc ore and 80 grams of butyl xanthate per ton of sulfur-associated zinc ore to the sulfur scavenging tailings in sequence, and after one sulfur-zinc roughing process, sulfur-zinc rough concentrate and sulfur-zinc rough tailings are obtained.

[0093] (7) After sulfur-zinc coarse concentrate is mixed and finely treated to obtain sulfur-zinc mixed concentrate, the sulfur-zinc mixed concentrate is magnetically separated to obtain third sulfur concentrate and zinc concentrate. The grade of third sulfur concentrate is 38% and the grade of zinc concentrate is 46.1%.

[0094] (8) After roasting the first sulfur concentrate, the second sulfur concentrate and the third sulfur concentrate respectively, iron concentrate products of different qualities can be obtained. The roasted product of the first sulfur concentrate is high-quality iron oxide. Due to its low impurity content, it can be further processed to obtain products such as coating materials with high added value. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid. The associated valuable element zinc has been efficiently and comprehensively recovered.

[0095] Example 2

[0096] This embodiment provides a beneficiation method for sulfur-associated zinc ore, as detailed below:

[0097] (1) Grind the sulfur-associated zinc ore to a fineness of 65% of the particles below 74μm and mix it with water to obtain a slurry.

[0098] (2) Add 3000 g of sulfuric acid per ton of sulfur-associated zinc ore, 80 g of ethyl xanthate per ton of sulfur-associated zinc ore, and 8 g of pine oil per ton of sulfur-associated zinc ore to the slurry in sequence. After sulfur roughing, the first sulfur roughing concentrate and the first sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 20%.

[0099] (3) The first sulfur roughing concentrate is ground, and the fineness of the grinding is 90% of the particles below 38μm. After sulfur beneficiation, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 53%.

[0100] (4) Add 800g of sulfuric acid per ton of sulfur-associated zinc ore, 100g of butyl xanthate per ton of sulfur-associated zinc ore, 50g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 4g of pine oil per ton of sulfur-associated zinc ore to the second sulfur roughing tailings in sequence. After one sulfur roughing, the second sulfur roughing concentrate and the second sulfur roughing tailings are obtained. After sulfur refining of the second sulfur roughing concentrate, the second sulfur concentrate is obtained. The grade of the second sulfur concentrate is 45.7%.

[0101] (5) Add 400 grams of sulfuric acid per ton of sulfur-associated zinc ore, 50 grams of butyl xanthate per ton of sulfur-associated zinc ore, and 25 grams of ethyl thiocyanate per ton of sulfur-associated zinc ore to the second sulfur roughing tailings in sequence, and obtain sulfur scavenging tailings after sulfur scavenging.

[0102] (6) Add 100 grams of copper sulfate per ton of sulfur-associated zinc ore and 120 grams of butyl xanthate per ton of sulfur-associated zinc ore to the sulfur scavenging tailings in sequence, and after one sulfur-zinc roughing process, sulfur-zinc rough concentrate and sulfur-zinc rough tailings are obtained.

[0103] (7) After sulfur-zinc coarse concentrate is mixed and finely treated to obtain sulfur-zinc mixed concentrate, the sulfur-zinc mixed concentrate is magnetically separated to obtain third sulfur concentrate and zinc concentrate. The grade of third sulfur concentrate is 35.5% and the grade of zinc concentrate is 45.9%.

[0104] (8) After roasting the first sulfur concentrate, the second sulfur concentrate and the third sulfur concentrate respectively, iron concentrate products of different qualities can be obtained. The roasted product of the first sulfur concentrate is high-quality iron oxide. Due to its low impurity content, it can be further processed to obtain products such as coating materials with high added value. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid. The associated valuable element zinc has been efficiently and comprehensively recovered.

[0105] Example 3

[0106] This embodiment provides a beneficiation method for sulfur-associated zinc ore, as detailed below:

[0107] (1) Grind the sulfur-associated zinc ore raw ore, and the fineness of the grinding is 85% of the particles below 74μm. After mixing with water, a slurry is obtained.

[0108] (2) Add 2000 g of sulfuric acid per ton of sulfur-associated zinc ore, 100 g of ethyl xanthate per ton of sulfur-associated zinc ore, 50 g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore to the slurry in sequence. After sulfur roughing, the first sulfur roughing concentrate and the first sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 20%.

[0109] (3) The first sulfur roughing concentrate is ground, and the fineness of the grinding is 95% of the particles below 38μm. After sulfur beneficiation, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 53.1%.

[0110] (4) Add 2000 g of sulfuric acid per ton of sulfur-associated zinc ore, 120 g of butyl xanthate per ton of sulfur-associated zinc ore, 60 g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 4 g of pine oil per ton of sulfur-associated zinc ore to the second sulfur roughing tailings in sequence. After one sulfur roughing, the second sulfur roughing concentrate and the second sulfur roughing tailings are obtained. After sulfur refining of the second sulfur roughing concentrate, the second sulfur concentrate is obtained. The grade of the second sulfur concentrate is 47.2%.

[0111] (5) Add 1000 g of sulfuric acid per ton of sulfur-associated zinc ore, 60 g of butyl xanthate per ton of sulfur-associated zinc ore, and 30 g of ethyl nitrogen per ton of sulfur-associated zinc ore to the second sulfur roughing tailings in sequence, and obtain sulfur scavenging tailings after sulfur scavenging.

[0112] (6) Add 100 grams of copper sulfate per ton of sulfur-associated zinc ore and 60 grams of isoamyl xanthate per ton of sulfur-associated zinc ore to the sulfur scavenging tailings in sequence, and after one sulfur-zinc roughing process, sulfur-zinc rough concentrate and sulfur-zinc rough tailings are obtained.

[0113] (7) After sulfur-zinc coarse concentrate is mixed and finely treated to obtain sulfur-zinc mixed concentrate, the sulfur-zinc mixed concentrate is magnetically separated to obtain third sulfur concentrate and zinc concentrate. The grade of third sulfur concentrate is 36.9% and the grade of zinc concentrate is 46.8%.

[0114] (8) After roasting the first sulfur concentrate, the second sulfur concentrate and the third sulfur concentrate respectively, iron concentrate products of different qualities can be obtained. The roasted product of the first sulfur concentrate is high-quality iron oxide. Due to its low impurity content, it can be further processed to obtain products such as coating materials with high added value. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid. The associated valuable element zinc has been efficiently and comprehensively recovered.

[0115] Example 4

[0116] This embodiment provides a beneficiation method for sulfur-associated zinc ore, as detailed below:

[0117] (1) Grind the sulfur-associated zinc ore to a fineness of 70% of the particles below 74μm, and mix it with water to obtain a slurry.

[0118] (2) Add 2000 g of sulfuric acid per ton of sulfur-associated zinc ore, 100 g of ethyl xanthate per ton of sulfur-associated zinc ore, 50 g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore to the slurry in sequence. After sulfur roughing, the first sulfur roughing concentrate and the first sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 10%.

[0119] (3) The first sulfur roughing concentrate is ground, and the fineness of the grinding is 90% of the particles below 38μm. After sulfur beneficiation, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 53.1%.

[0120] (4) Add 600g of sulfuric acid per ton of sulfur-associated zinc ore, 60g of butyl xanthate per ton of sulfur-associated zinc ore, 30g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 4g of pine oil per ton of sulfur-associated zinc ore to the second sulfur roughing tailings in sequence. After two sulfur roughing processes, the second sulfur roughing concentrate and the second sulfur roughing tailings are obtained. After sulfur refining of the second sulfur roughing concentrate, the second sulfur concentrate is obtained with a grade of 47.9%.

[0121] (5) Add 300 grams of sulfuric acid per ton of sulfur-associated zinc ore, 30 grams of butyl xanthate per ton of sulfur-associated zinc ore, and 15 grams of ethyl thiocyanate per ton of sulfur-associated zinc ore to the second sulfur roughing tailings in sequence, and obtain sulfur scavenging tailings after sulfur scavenging.

[0122] (6) Add 100 grams of copper sulfate per ton of sulfur-associated zinc ore and 60 grams of butyl xanthate per ton of sulfur-associated zinc ore to the sulfur scavenging tailings in sequence, and perform two sulfur-zinc roughing processes to obtain sulfur-zinc rough concentrate and sulfur-zinc rough tailings.

[0123] (7) After sulfur-zinc coarse concentrate is mixed and finely treated to obtain sulfur-zinc mixed concentrate, the sulfur-zinc mixed concentrate is magnetically separated to obtain third sulfur concentrate and zinc concentrate. The grade of third sulfur concentrate is 36.78% and the grade of zinc concentrate is 46.9%.

[0124] (8) After roasting the first sulfur concentrate, the second sulfur concentrate and the third sulfur concentrate respectively, iron concentrate products of different qualities can be obtained. The roasted product of the first sulfur concentrate is high-quality iron oxide. Due to its low impurity content, it can be further processed to obtain products such as coating materials with high added value. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid. The associated valuable element zinc has been efficiently and comprehensively recovered.

[0125] Comparative Example 1

[0126] This comparative example provides a beneficiation method for sulfur-associated zinc ore, as follows:

[0127] (1) Grind the sulfur-associated zinc ore to a fineness of 70% of the particles below 74μm, and mix it with water to obtain a slurry.

[0128] (2) Add 2000 g of sulfuric acid per ton of sulfur-associated zinc ore, 100 g of butyl xanthate per ton of sulfur-associated zinc ore, 50 g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore to the slurry in sequence. After sulfur roughing, the first sulfur roughing concentrate and the first sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 10%.

[0129] (3) Add 1000 g of sulfuric acid per ton of sulfur-associated zinc ore, 50 g of butyl xanthate per ton of sulfur-associated zinc ore, and 25 g of ethyl thiocyanate per ton of sulfur-associated zinc ore to the first sulfur roughing tailings in sequence. After sulfur roughing, the second sulfur roughing concentrate and the second sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 10%.

[0130] (4) The first sulfur roughing concentrate and the second sulfur roughing concentrate are ground to a fineness of 90% of the particles below 38 μm. After sulfur beneficiation, sulfur concentrate is obtained with a grade of 47.82%.

[0131] (5) Add 500 grams of sulfuric acid per ton of sulfur-associated zinc ore, 30 grams of butyl xanthate per ton of sulfur-associated zinc ore, and 15 grams of ethyl thiocyanate per ton of sulfur-associated zinc ore to the first sulfur roughing tailings in sequence, and obtain sulfur scavenging tailings after sulfur scavenging.

[0132] (6) Roasting sulfur concentrate can yield high-grade iron concentrate products, and the sulfur-containing flue gas generated after roasting can be recycled to produce sulfuric acid. However, only sulfur is recovered, and high-value-added iron concentrate products cannot be obtained, resulting in the waste of zinc resources.

[0133] Comparative Example 2

[0134] This comparative example provides a beneficiation method for sulfur-associated zinc ore, as follows:

[0135] (1) Grind the sulfur-associated zinc ore to a fineness of 80% of the particles below 74μm, and mix it with water to obtain a slurry.

[0136] (2) Add 6000g of lime per ton of sulfur-associated zinc ore to the slurry in sequence, adjust the pH of the slurry to 12, add 150g of copper sulfate per ton of sulfur-associated zinc ore, 100g of butyl xanthate per ton of sulfur-associated zinc ore, and 12g of pine oil per ton of sulfur-associated zinc ore, and then perform zinc roughing to obtain zinc roughing concentrate and zinc roughing tailings.

[0137] (3) The first zinc roughing concentrate is ground, and the fineness of the grinding is 90% of the particles below 38μm. After zinc beneficiation, zinc concentrate is obtained with a grade of 12.4%.

[0138] (4) Add 7000 g of sulfuric acid per ton of sulfur-associated zinc ore, 100 g of butyl xanthate per ton of sulfur-associated zinc ore, 50 g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore to the zinc roughing tailings in sequence. After sulfur roughing, the first sulfur roughing concentrate and the first sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 30%.

[0139] (5) Add 1000 g of sulfuric acid per ton of sulfur-associated zinc ore, 50 g of butyl xanthate per ton of sulfur-associated zinc ore, and 25 g of ethyl thiocyanate per ton of sulfur-associated zinc ore to the first sulfur roughing tailings in sequence. After sulfur roughing, the second sulfur roughing concentrate and the second sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 30%.

[0140] (6) The first sulfur roughing concentrate and the second sulfur roughing concentrate are ground to a fineness of 90% of the particles below 38 μm. After sulfur beneficiation, sulfur concentrate is obtained with a grade of 48.22%.

[0141] (7) High-grade iron concentrate is obtained after roasting sulfur concentrate. The sulfur-containing flue gas generated after roasting can be recovered to prepare sulfuric acid. The process of prioritizing zinc and then sulfur cannot obtain high-value-added iron concentrate, does not obtain qualified zinc concentrate, does not recover zinc comprehensively, and sulfur enters the zinc concentrate, resulting in sulfur loss and affecting sulfur recovery. In addition, the process of high alkali followed by acid causes a large waste of reagents, increases costs, and is prone to process instability.

[0142] Comparative Example 3

[0143] This comparative example provides a beneficiation method for sulfur-associated zinc ore, as follows:

[0144] (1) Grind the sulfur-associated zinc ore to a fineness of 70% of the particles below 74μm, and mix it with water to obtain a slurry.

[0145] (2) Add 150g of copper sulfate activator per ton of sulfur-associated zinc ore, 100g of butyl xanthate per ton of sulfur-associated zinc ore, and 12g of pine oil per ton of sulfur-associated zinc ore to the slurry in sequence. After zinc-sulfur roughing, zinc-sulfur roughing concentrate and zinc-sulfur roughing tailings are obtained.

[0146] (3) Add lime to the zinc-sulfur rough concentrate for grinding. The amount of lime is 2000 grams per ton of sulfur-associated zinc ore. The fineness of grinding is 90% of the particles below 38μm. After zinc-sulfur separation and beneficiation, the first sulfur concentrate and zinc concentrate are obtained. The grade of the first sulfur concentrate is 45.6%, and the zinc grade of the zinc concentrate is 14.8%.

[0147] (4) Add 2000 g of sulfuric acid per ton of sulfur-associated zinc ore, 60 g of butyl xanthate per ton of sulfur-associated zinc ore, 30 g of ethyl thiocyanate per ton of sulfur-associated zinc ore, and 8 g of pine oil per ton of sulfur-associated zinc ore to the zinc roughing tailings in sequence. After sulfur roughing, sulfur roughing concentrate and sulfur roughing tailings are obtained, wherein the concentration of sulfuric acid is 20%.

[0148] (5) Add 500 grams of sulfuric acid per ton of sulfur-associated zinc ore, 30 grams of butyl xanthate per ton of sulfur-associated zinc ore, and 15 grams of ethyl thiocyanate per ton of sulfur-associated zinc ore to the sulfur roughing tailings in sequence, and obtain sulfur tailings after sulfur scavenging.

[0149] (6) Grind the sulfur roughing concentrate to a fineness of 90% of the particles below 38 μm. After sulfur beneficiation, a second sulfur concentrate is obtained with a grade of 47.42%.

[0150] (7) High-grade iron concentrate is obtained after roasting the first and second sulfur concentrates. The sulfur-containing flue gas generated after roasting can be recovered to prepare sulfuric acid. The zinc-sulfur mixed flotation and separation-enhanced sulfur beneficiation process cannot obtain high-value-added iron concentrate products, does not obtain qualified zinc concentrate, does not recover zinc comprehensively, and sulfur enters the zinc concentrate, resulting in sulfur loss and affecting sulfur recovery.

[0151] 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.

[0152] 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, in the foregoing claims, 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 sulfur-associated zinc ore, characterized in that, include: The raw zinc ore with sulfur association is first ground and then pulped to obtain a slurry. First sulfuric acid, selective sulfur collector and first frother are added to the slurry in sequence. The slurry is then subjected to first sulfur roughing to obtain first sulfur roughing concentrate and first sulfur roughing tailings. The first sulfur roughing concentrate is subjected to a second grinding process followed by a first sulfur refining process to obtain a first sulfur concentrate. A second sulfuric acid, a first sulfur collector, and a second frother are sequentially added to the first sulfur roughing tailings, and a second sulfur roughing process is performed to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings. The second sulfur roughing process is performed at least once. The second sulfur roughing concentrate is then subjected to a second sulfur refining process to obtain a second sulfur concentrate. A third sulfuric acid and a second sulfur collector are sequentially added to the second sulfur roughing tailings, and a sulfur scavenging process is performed to obtain a sulfur scavenging tailings. An activator and a sulfur-zinc collector are added sequentially to the sulfur scavenging tailings. After sulfur-zinc roughing, sulfur-zinc rough concentrate and sulfur-zinc rough tailings are obtained. The sulfur-zinc roughing is performed at least once. After sulfur-zinc mixed cleaning, sulfur-zinc mixed concentrate is obtained. After magnetic separation, a third sulfur concentrate and zinc concentrate are obtained. The sulfur-associated zinc ore has a sulfur grade of not less than 28% and a zinc grade of not less than 0.3%. in, The concentration of the first sulfuric acid is 10-30 wt%, and the dosage is 1000-4000 grams per ton of sulfur-associated zinc ore. The selective sulfur collector includes at least one of ethyl xanthate and ethyl xanthate, and is used at a dosage of 40-200 grams per ton of sulfur-associated zinc ore. The first foaming agent includes at least one of methyl isobutyl methanol, pine oil, pine alcohol oil, alcohols, and butyl ether alcohol, and is used at a dosage of 4-40 grams per ton of sulfur-associated zinc ore. The concentration of the second sulfuric acid is 10-30 wt%, and the dosage is 500-2000 grams per ton of sulfur-associated zinc ore. The first sulfur collector includes at least one of ethyl xanthate, ethyl xanthate, and butyl xanthate, and is used at a dosage of 5-120 grams per ton of sulfur-associated zinc ore. The second foaming agent includes at least one of methyl isobutyl methanol, pine oil, pine alcohol oil, alcohols, and butyl ether alcohol, and is used at a dosage of 4-40 grams per ton of sulfur-associated zinc ore. The concentration of the third sulfuric acid is 10-30 wt%, and the dosage is 200-1000 grams per ton of sulfur-associated zinc ore. The second sulfur collector includes at least one of ethyl xanthate, ethyl xanthate, and butyl xanthate, and is used at a dosage of 5-120 grams per ton of sulfur-associated zinc ore. The activator includes at least one of copper sulfate, copper nitrate, and lead nitrate, and is used at a rate of 20-500 grams per ton of sulfur-associated zinc ore. The sulfur-zinc collector includes at least one of isopropyl xanthate, butyl xanthate, and isopentyl xanthate, and is used at a dosage of 20-100 grams per ton of sulfur-associated zinc ore.

2. The beneficiation method for sulfur-associated zinc ore according to claim 1, characterized in that, After the first grinding, the fineness of the sulfur-associated zinc ore is 65-85 wt%, and the particle size of the sulfur-associated zinc ore does not exceed 74 μm.

3. The beneficiation method for sulfur-associated zinc ore according to claim 1, characterized in that, After the second grinding, the fineness of the first sulfur roughing concentrate is 80-95 wt%, and the particle size of the first sulfur roughing concentrate does not exceed 38 μm.

4. The beneficiation method for sulfur-associated zinc ore according to claim 1, characterized in that, At least one of the following conditions must be met: k. In the first sulfur concentrate, the sulfur grade is greater than 52.8%; 1. In the second sulfur concentrate, the sulfur grade is 44.0-48.0%; m. The sulfur grade in the third sulfur concentrate is greater than 34%.

5. The beneficiation method for sulfur-associated zinc ore according to any one of claims 1-4, characterized in that, After roasting the first sulfur concentrate, the second sulfur concentrate, and the third sulfur concentrate, a high-grade iron concentrate product is obtained. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid.

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