Beneficiation method of sulfur associated zinc ore

Abstract

The invention provides a beneficiation method for sulfur associated zinc ore, and relates to the field of mining and metallurgy. Sulfur associated zinc ore raw ore is subjected to first grinding and then pulpifying to obtain ore pulp, and first sulfur roughing concentrate and first sulfur roughing tailings are obtained after first sulfur roughing is conducted on the ore pulp; the first sulfur roughing concentrate is subjected to second grinding and then subjected to first sulfur concentration, and first sulfur concentrate is obtained; second sulfur roughing concentrate and second sulfur roughing tailings are obtained after second sulfur roughing is conducted on the first sulfur roughing tailings, and second sulfur concentrate is obtained after second sulfur concentration is conducted on the second sulfur roughing concentrate; performing sulfur scavenging on the second sulfur roughing tailings to obtain sulfur scavenging tailings; performing sulfur-zinc roughing on the sulfur scavenging tailings to obtain sulfur-zinc rough concentrate and sulfur-zinc rough tailings; and sulfur and zinc mixed concentration is carried out on the sulfur and zinc rough concentrate to obtain sulfur and zinc bulk concentrate, and magnetic separation is carried out on the sulfur and zinc bulk concentrate to obtain third sulfur concentrate and zinc concentrate.

Description

Technical Field

[0001] The present application relates to the field of mining and metallurgy, and in particular to a method for beneficiating sulfur-associated zinc ore. Background Art

[0002] High-grade sulfur-associated zinc ore often contains minerals such as pyrite, pyrrhotite, and sphalerite. Due to the high sulfur content and the wide range of floatability of sulfur minerals, it is difficult to recover the associated zinc element.

[0003] Since sulfur minerals have similar floatability to the target minerals, it is often necessary to suppress sulfur-containing minerals to give priority to the floatation of the target minerals. For high-grade sulfur-associated zinc ores, usually only the sulfur minerals are recovered, or a process of preferential zinc and sulfur-zinc mixed flotation and separation is adopted. If only the sulfur minerals in the ore are recovered, it will not only cause a waste of resources, but also affect the benefits of the enterprise; if the process of preferential zinc and sulfur-zinc mixed flotation and separation is adopted to recover zinc, a large amount of sulfur inhibitors must be added in the process, the production cost is high, the process is unstable, and the sulfur minerals with good floatability will enter the zinc concentrate, resulting in a low grade of the zinc concentrate and an inability to obtain qualified products.

[0004] For ores that are mainly used to recover sulfur minerals, since their value lies mainly in the iron they contain, how to fine-tune the sorting, reduce production costs, and at the same time improve product quality, increase product added value, and recover the associated valuable elements as much as possible are the main problems that current business operations need to solve. Summary of the invention

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

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

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

[0008] The sulfur-associated zinc ore is first ground and then pulped to obtain a slurry, and the slurry is 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 and then subjected to a first sulfur beneficiation to obtain a first sulfur concentrate; the first sulfur roughing tailings are subjected to a second sulfur roughing to obtain a second sulfur roughing concentrate and a second sulfur roughing tailing, and the second sulfur roughing concentrate is subjected to a second beneficiation to obtain a second sulfur concentrate; the second sulfur roughing tailings are subjected to a sulfur scavenging to obtain a sulfur scavenging tailing;

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

[0011] Optionally, the sulfur grade of 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 65-85wt% and the particle size of the sulfur-associated zinc ore does not exceed 74μm.

[0013] Optionally, when performing the first sulfur roughing, a first sulfuric acid, a selective sulfur collector, and a first foaming agent are sequentially added to the ore pulp.

[0014] Optionally, the concentration of the first sulfuric acid is 10-30wt%, 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 disulfide and ethyl xanthate, and the dosage is 40-200 grams per ton of sulfur-associated zinc ore.

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

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

[0018] Optionally, when the second sulfur roughing is carried out, a second sulfuric acid, a first sulfur collector, and a second foaming agent are sequentially added to the first sulfur roughing tailings, and the sulfur roughing is carried out at least once.

[0019] Optionally, the concentration of the second sulfuric acid is 10-30wt%, 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 dithiocarb, ethyl xanthate, and butyl xanthate, and the dosage is 5-120 grams per ton of sulfur-associated zinc ore.

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

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

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

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

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

[0026] Optionally, the activator includes at least one of copper sulfate, copper nitrate and lead nitrate, and the amount used is 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 the dosage is 20-100 grams per ton of sulfur-associated zinc ore.

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

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

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

[0031] Optionally, after roasting the first sulfur concentrate, the second sulfur concentrate, and the third sulfur concentrate, a high-grade iron ore concentrate product is obtained, and 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 adopting the step-by-step flotation of sulfur, sulfur products of different qualities are obtained, thus increasing the added value of the products; different reagent systems are adopted according to the flotation characteristics of different sulfur-containing minerals, thus reducing the reagent cost; the main flotation process gives priority to selecting sulfur with better floatability, thus avoiding the addition of a large amount of sulfur inhibitors for the preferential selection of zinc, and improving the quality of the selected zinc, and then recovers the pyrrhotite and associated zinc minerals with poor floatability, and then uses magnetic separation to achieve efficient separation of zinc concentrate, thus avoiding the use of lime, an acidic flotation environmental inhibitor, reducing production costs, realizing the comprehensive utilization of resources, avoiding pollution to the environment, and benefiting the company's cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope of the present application.

[0035] Figure 1 A schematic flow chart of a method for beneficiating sulfur-associated zinc ore provided in an embodiment. DETAILED DESCRIPTION

[0036] As used herein:

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

[0038] The conjunction "consisting of excludes any unspecified element, step, or component. If used in a claim, this phrase renders the claim closed-ended so that it does not include materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause of the body of a claim rather than immediately following the subject matter, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0039] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described in this article, unless otherwise stated, the range is intended to include its end values ​​and all integers and fractions within the range.

[0040] In these examples, parts and percentages are by mass unless otherwise indicated.

[0041] "Parts by mass" refers to the basic unit of measurement for expressing the mass ratio of multiple components. 1 part can represent any unit mass, such as 1g or 2.689g. If we say that the mass of component A is a parts and the mass of component B is b parts, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it means that the mass of component A is aK and the mass of component B is bK (K is an arbitrary number, indicating a multiple factor). It should not be misunderstood that, unlike the mass parts, the sum of the mass of all components is not limited to 100 parts.

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

[0043] In order to better explain the technical solution provided by the present application, the technical solution is first described as a whole before the embodiments.

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

[0045] The sulfur-associated zinc ore is first ground and then pulped to obtain a slurry, and the slurry is 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 and then subjected to a first sulfur concentration to obtain a first sulfur concentrate; the sulfur roughing tailings are subjected to a second sulfur roughing concentration to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings; the second sulfur roughing concentrate is subjected to a second concentration to obtain a second sulfur concentrate; the second sulfur roughing tailings are subjected to a sulfur scavenging concentration to obtain a sulfur scavenging tailings;

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

[0048] In an optional embodiment, the sulfur content of the sulfur-associated zinc ore is not less than 28%, and the zinc content is not less than 0.3%. Sulfur is mainly present in pyrite, partly in pyrrhotite, and zinc is mainly sphalerite.

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

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

[0051] In an optional embodiment, when the first sulfur roughing is performed, a first sulfuric acid, a selective sulfur collector, and a first foaming agent are sequentially added to the ore pulp.

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

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

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

[0057] Optionally, the dosage 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 4-40 grams per ton of sulfur-associated zinc ore.

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

[0059] Optionally, after the second grinding, the fineness of the sulfur-associated zinc ore is 80-95wt% and the particle size of the first sulfur rougher concentrate may be 38μm, 37μm, 36μm, 35μm, 34μm, 33μm, 32μm, 31μm, 30μm, 29μm, 28μm, 27μm, 26μm, 25μm, 24μm, 23μm, 22μm, 21μm, 20μm, or any value in which the particle size of 80-95wt% of the first sulfur rougher concentrate does not exceed 38μm.

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

[0061] In an optional embodiment, the concentration of the second sulfuric acid is grams per ton of sulfur-associated zinc ore, and the dosage is 500-2000 grams per ton of sulfur-associated zinc ore. Optionally, the concentration of the second sulfuric acid can be any value between 10% and 30% by mass concentration; the dosage of the second sulfuric acid can be 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, 1100 grams per ton of sulfur-associated zinc ore, 1200 grams per ton of sulfur-associated zinc ore. Raw 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 500-2000 grams per ton of sulfur-associated zinc ore.

[0062] In an optional embodiment, the first sulfur collector includes at least one of ethyl dithiocarb, ethyl xanthate, and butyl xanthate, and the dosage is 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 5-120 grams per ton of sulfur-associated zinc ore.

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

[0065] Optionally, the dosage 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 4-40 grams per ton of sulfur-associated zinc ore.

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

[0067] In an 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 concentration; the dosage 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 200-1000 grams per ton of sulfur-associated zinc ore.

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

[0071] In an optional embodiment, when the sulfur-zinc roughing is carried out, an activator and a zinc matte collector are sequentially added to the sulfur scavenging tailings, and the zinc matte roughing is carried out at least once.

[0072] In an optional embodiment, the activator includes at least one of copper sulfate, copper nitrate and lead nitrate, and the amount used is 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, 130 grams per ton of sulfur-associated zinc ore, Raw 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 an optional embodiment, the sulfur-zinc collector includes at least one of isopropyl xanthate, butyl xanthate, and isopentyl xanthate, and the dosage is 20-100 grams per ton of sulfur-associated zinc ore.

[0075] Optionally, the dosage 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 20-100 grams per ton of sulfur-associated zinc ore.

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

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

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

[0079] Optionally, after roasting the first sulfur concentrate, the second sulfur concentrate, and the third sulfur concentrate, a high-grade iron ore concentrate product is obtained, and the sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid.

[0080] It can be understood that the beneficiation method of high-grade sulfur-associated zinc provided by the present application is particularly for ores with high sulfur content, diverse occurrence states, large differences in the floatability of sulfur minerals, and associated low-grade zinc. After grinding the ore, the present invention uses the first sulfuric acid, a selective collector, and a frother to perform a first round of sulfur roughing on the slurry. The first sulfur roughing concentrate is re-grinded and then finely selected to obtain the first sulfur concentrate. The sulfur in the first sulfur concentrate is present in pyrite, and the grade of sulfur is greater than 52.8%. After roasting, high-quality iron oxides can be obtained. Due to the low impurity content, products such as coating materials with high added value can be obtained after deep processing. The sulfur-containing flue gas generated after roasting can also be recovered through the acid production system to produce acid, and the produced sulfuric acid is reused in the roughing process to avoid pollution to the environment.

[0081] The second sulfur roughing tailings are added with second sulfuric acid and a collector for sulfur roughing, and the obtained second sulfur rough concentrate is subjected to second sulfur fine concentration to obtain a second sulfur concentrate; the sulfur in the second sulfur concentrate is present in pyrite, but the sulfur is embedded in fine particle size and has a complex embedding relationship, so the sulfur grade in the second sulfur concentrate is lower than that in the first sulfur concentrate, and the sulfur grade is 44.0%-48.0%, and a high-grade iron ore concentrate product can be obtained after roasting, and the sulfur-containing flue gas generated after roasting can also generate sulfuric acid through the acid-making system and be recycled to the flotation process.

[0082] The sulfur scavenging tailings are added with an activator and a zinc-sulfur collector for mixed flotation of zinc and sulfur. The obtained sulfur-zinc coarse concentrate is subjected to magnetic separation to achieve efficient separation of zinc and sulfur to obtain a third sulfur concentrate and a zinc concentrate. The sulfur in the third sulfur concentrate is present in pyrrhotite, and the sulfur grade is greater than 34.0%. The third sulfur concentrate is combined with the second sulfur concentrate, roasted to recover iron, and acid is produced for reuse in the flotation process. Since the yield of the third sulfur concentrate is smaller than that of the second sulfur concentrate, the combination has little effect on the grade of the iron concentrate product.

[0083] The embodiments of the present application will be described in detail below in conjunction with specific examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. If specific conditions are not specified in the examples, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they 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, based on the mass of the sulfur-associated zinc ore itself being 100%.

[0085] Example 1

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

[0087] (1) The sulfur-associated zinc ore is ground to a fineness of 65% or less of 74 μm, and mixed with water to obtain ore slurry.

[0088] (2) 4000 g / t of sulfur-associated zinc ore, 40 g / t of ethyl xanthate, 20 g / t of ethyl dithiocarbamide, and 12 g / t of pine oil are sequentially added to the slurry to perform sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings, wherein the concentration of sulfuric acid is 30%.

[0089] (3) The first sulfur rougher concentrate is ground, and the particle size of the ground concentrate is 90% of that of which is below 38 μm. After sulfur concentration, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 52.9%.

[0090] (4) 500 g of sulfuric acid per ton of sulfur-associated zinc ore, 80 g of butyl xanthate per ton of sulfur-associated zinc ore, 40 g of ethyl dithiocarbamide per ton of sulfur-associated zinc ore, and 4 g of pine oil per ton of sulfur-associated zinc ore are added to the first sulfur roughing tailings in sequence, and a sulfur roughing is performed to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings. The second sulfur roughing concentrate is subjected to sulfur concentration to obtain a second sulfur concentrate, and the grade of the second sulfur concentrate is 47.6%.

[0091] (5) sulfuric acid (250 g / t sulfur-associated zinc ore), butyl xanthate (40 g / t sulfur-associated zinc ore), and ethyl dithiocarbamide (20 g / t sulfur-associated zinc ore) are sequentially added to the second sulfur roughing tailings to perform sulfur scavenging to obtain sulfur scavenging tailings.

[0092] (6) 50 g of copper sulfate per ton of sulfur-associated zinc ore and 80 g of butyl xanthate per ton of sulfur-associated zinc ore are added to the sulfur scavenging tailings in sequence, and a sulfur-zinc roughing is performed to obtain a sulfur-zinc rough concentrate and a sulfur-zinc rough tailings.

[0093] (7) The sulfur-zinc coarse concentrate is subjected to sulfur-zinc mixed concentration to obtain a sulfur-zinc mixed concentrate, and the sulfur-zinc mixed concentrate is subjected to magnetic separation to obtain a third sulfur concentrate and a zinc concentrate. The grade of the third sulfur concentrate is 38% and the grade of the 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 used to obtain high-value-added coating materials and other products after deep processing. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid; the associated valuable element zinc is efficiently and comprehensively recovered.

[0095] Example 2

[0096] This embodiment provides a method for beneficiating sulfur-associated zinc ore, which is as follows:

[0097] (1) The sulfur-associated zinc ore is ground to a fineness of 65% or less of 74 μm, and mixed with water to obtain ore slurry.

[0098] (2) 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 are sequentially added to the slurry to perform sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings, wherein the concentration of sulfuric acid is 20%.

[0099] (3) The first sulfur rougher concentrate is ground, and the particle size of the ground concentrate is 90% of that of which is below 38 μm. After sulfur concentration, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 53%.

[0100] (4) 800 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 4 g of pine oil per ton of sulfur-associated zinc ore are added to the second sulfur roughing tailings in sequence, and a sulfur roughing is performed to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings. The second sulfur roughing concentrate is subjected to sulfur concentration to obtain a second sulfur concentrate, and the grade of the second sulfur concentrate is 45.7%.

[0101] (5) 400 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 dithiocarbamide per ton of sulfur-associated zinc ore are added to the second sulfur roughing tailings in sequence, and sulfur scavenging is performed to obtain sulfur scavenging tailings.

[0102] (6) 100 g of copper sulfate per ton of sulfur-associated zinc ore and 120 g of butyl xanthate per ton of sulfur-associated zinc ore are sequentially added to the sulfur scavenging tailings, and a sulfur-zinc roughing is performed to obtain a sulfur-zinc rough concentrate and a sulfur-zinc rough tailings.

[0103] (7) The sulfur-zinc coarse concentrate is subjected to sulfur-zinc mixed concentration to obtain a sulfur-zinc mixed concentrate, and the sulfur-zinc mixed concentrate is subjected to magnetic separation to obtain a third sulfur concentrate and a zinc concentrate. The grade of the third sulfur concentrate is 35.5% and the grade of the 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 used to obtain high-value-added coating materials and other products after deep processing. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid; the associated valuable element zinc is efficiently and comprehensively recovered.

[0105] Example 3

[0106] This embodiment provides a method for beneficiating sulfur-associated zinc ore, which is as follows:

[0107] (1) The sulfur-associated zinc ore is ground to a fineness of 85% of the particles below 74 μm, and mixed with water to obtain ore slurry.

[0108] (2) 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore are sequentially added to the slurry to perform sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings, wherein the concentration of sulfuric acid is 20%.

[0109] (3) The first sulfur rougher concentrate is ground, and the particle size of the ground concentrate is 95% of that of 38 μm or less. After sulfur concentration, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 53.1%.

[0110] (4) 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 4 g of pine oil per ton of sulfur-associated zinc ore are added to the second sulfur roughing tailings in sequence, and a sulfur roughing is performed to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings. The second sulfur roughing concentrate is subjected to sulfur concentration to obtain a second sulfur concentrate, and the grade of the second sulfur concentrate is 47.2%.

[0111] (5) 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 dithiocarbamide per ton of sulfur-associated zinc ore are sequentially added to the second sulfur roughing tailings to perform sulfur scavenging to obtain sulfur scavenging tailings.

[0112] (6) adding 100 g of copper sulfate per ton of sulfur-associated zinc ore and 60 g of isopentyl xanthate per ton of sulfur-associated zinc ore to the sulfur scavenging tailings in sequence, and performing a sulfur-zinc roughing separation to obtain a sulfur-zinc rough concentrate and a sulfur-zinc rough tailings.

[0113] (7) The sulfur-zinc coarse concentrate is subjected to sulfur-zinc mixed concentration to obtain a sulfur-zinc mixed concentrate, and the sulfur-zinc mixed concentrate is subjected to magnetic separation to obtain a third sulfur concentrate and a zinc concentrate. The grade of the third sulfur concentrate is 36.9% and the grade of the 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 used to obtain high-value-added coating materials and other products after deep processing. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid; the associated valuable element zinc is efficiently and comprehensively recovered.

[0115] Example 4

[0116] This embodiment provides a method for beneficiating sulfur-associated zinc ore, which is as follows:

[0117] (1) The sulfur-associated zinc ore is ground to a fineness of 74 μm or less, which accounts for 70%, and mixed with water to obtain ore slurry.

[0118] (2) 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore are sequentially added to the slurry to perform sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings, wherein the concentration of sulfuric acid is 10%.

[0119] (3) The first sulfur rougher concentrate is ground, and the particle size of the ground concentrate is 90% of that of which is below 38 μm. After sulfur concentration, the first sulfur concentrate is obtained, and the grade of the first sulfur concentrate is 53.1%.

[0120] (4) To the second sulfur roughing tailings, 600 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 4 g of pine oil per ton of sulfur-associated zinc ore are added in sequence, and after two sulfur roughings, a second sulfur roughing concentrate and a second sulfur roughing tailing are obtained. After sulfur concentration of the second sulfur roughing concentrate, a second sulfur concentrate is obtained. The grade of the second sulfur concentrate is 47.9%.

[0121] (5) 300 g of sulfuric acid per ton of sulfur-associated zinc ore, 30 g of butyl xanthate per ton of sulfur-associated zinc ore, and 15 g of ethyl dithiocarbamide per ton of sulfur-associated zinc ore are added to the second sulfur roughing tailings in sequence, and sulfur scavenging is performed to obtain sulfur scavenging tailings.

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

[0123] (7) The sulfur-zinc coarse concentrate is subjected to sulfur-zinc mixed concentration to obtain a sulfur-zinc mixed concentrate, and the sulfur-zinc mixed concentrate is subjected to magnetic separation to obtain a third sulfur concentrate and a zinc concentrate. The grade of the third sulfur concentrate is 36.78%, and the grade of the 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 used to obtain high-value-added coating materials and other products after deep processing. The sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid; the associated valuable element zinc is efficiently and comprehensively recovered.

[0125] Comparative Example 1

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

[0127] (1) The sulfur-associated zinc ore is ground to a fineness of 74 μm or less, which accounts for 70%, and mixed with water to obtain ore slurry.

[0128] (2) 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore are sequentially added to the slurry to perform sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings, wherein the concentration of sulfuric acid is 10%.

[0129] (3) 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 dithiocarbamide per ton of sulfur-associated zinc ore are sequentially added to the first sulfur roughing tailings to perform sulfur roughing to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings, wherein the concentration of sulfuric acid is 10%.

[0130] (4) The first sulfur rougher concentrate and the second sulfur rougher concentrate are ground, and the particle size of the ground ore is 90% of that below 38 μm. After sulfur concentration, sulfur concentrate is obtained, and the grade of the sulfur concentrate is 47.82%.

[0131] (5) 500 g of sulfuric acid per ton of sulfur-associated zinc ore, 30 g of butyl xanthate per ton of sulfur-associated zinc ore, and 15 g of ethyl dithiocarbamide per ton of sulfur-associated zinc ore are added to the first sulfur roughing tailings in sequence, and sulfur scavenging is performed to obtain sulfur scavenging tailings.

[0132] (6) After roasting the sulfur concentrate, a high-grade iron concentrate product can be obtained, and the sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid. If only sulfur is recovered, high-value-added iron concentrate products cannot be obtained, and the associated zinc resources are wasted.

[0133] Comparative Example 2

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

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

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

[0137] (3) The first zinc rougher concentrate is ground, and the particle size of the ground concentrate is 90% of that of which is below 38 μm. After zinc concentration, a zinc concentrate is obtained, and the grade of the zinc concentrate is 12.4%.

[0138] (4) 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 12 g of pine oil per ton of sulfur-associated zinc ore are added to the zinc roughing tailings in sequence, and sulfur roughing is performed to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings, wherein the concentration of sulfuric acid is 30%.

[0139] (5) 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 dithiocarbamide per ton of sulfur-associated zinc ore are sequentially added to the first sulfur roughing tailings to perform sulfur roughing to obtain a second sulfur roughing concentrate and a second sulfur roughing tailings, wherein the concentration of sulfuric acid is 30%.

[0140] (6) The first sulfur rougher concentrate and the second sulfur rougher concentrate are ground, and the particle size of the ground ore is 90% of that of which is below 38 μm. After sulfur concentration, sulfur concentrate is obtained, and the grade of the sulfur concentrate is 48.22%.

[0141] (7) After roasting the sulfur concentrate, a high-grade iron concentrate product is obtained, and the sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid. The process of selecting zinc first and then selecting sulfur cannot obtain high-value-added iron concentrate products, does not obtain qualified zinc concentrate, and zinc is not comprehensively recovered. Sulfur enters the zinc concentrate, resulting in sulfur loss, affecting sulfur recovery. In addition, high alkali first and then acid causes a large amount of reagent waste, increases costs, and easily causes process instability.

[0142] Comparative Example 3

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

[0144] (1) The sulfur-associated zinc ore is ground to a fineness of 74 μm or less, which accounts for 70%, and mixed with water to obtain ore slurry.

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

[0146] (3) Lime is added to the zinc-sulfur roughing concentrate for grinding. The amount of lime used is 2000 grams per ton of sulfur-associated zinc ore. The particle size of the ground ore is 90% of that below 38 μm. After zinc-sulfur separation and concentration, a first sulfur concentrate and a zinc concentrate are obtained. The grade of the first sulfur concentrate is 45.6%, and the grade of the zinc concentrate is 14.8%.

[0147] (4) 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 dithiocarbamide per ton of sulfur-associated zinc ore, and 8 g of pine oil per ton of sulfur-associated zinc ore are added to the zinc-sulfur roughing tailings in sequence, and sulfur roughing is performed to obtain sulfur roughing concentrate and sulfur roughing tailings, wherein the concentration of sulfuric acid is 20%.

[0148] (5) 500 g of sulfuric acid per ton of sulfur-associated zinc ore, 30 g of butyl xanthate per ton of sulfur-associated zinc ore, and 15 g of ethyl dithiocarbamide per ton of sulfur-associated zinc ore are added to the sulfur roughing tailings in sequence, and sulfur scavenging is performed to obtain sulfur tailings.

[0149] (6) The sulfur roughing concentrate is ground, and the particle size of the ground concentrate is 90% of that of which is below 38 μm. After sulfur concentration, a second sulfur concentrate is obtained, and the grade of the second sulfur concentrate is 47.42%.

[0150] (7) After roasting the first sulfur concentrate and the second sulfur concentrate, a high-grade iron concentrate product is obtained, and the sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid. The zinc-sulfur mixed flotation re-separation-enhanced sulfur selection process cannot obtain a high-value-added iron concentrate product, a qualified zinc concentrate is not obtained, zinc is not comprehensively recovered, and sulfur enters the zinc concentrate, resulting in sulfur loss, which affects sulfur recovery.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0152] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the above claims, any one of the claimed embodiments may be used in any combination. The information disclosed in this background technology section is intended only to deepen the understanding of the overall background technology of the present application and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. A method for beneficiating sulfur-associated zinc ore, characterized in that: include: The sulfur-associated zinc ore is first ground and then pulped to obtain a slurry, and the slurry is subjected to a first sulfur roughing to obtain a first sulfur roughing concentrate and a first sulfur roughing tailings; The first sulfur roughing concentrate is subjected to a second grinding and then subjected to a first sulfur beneficiation to obtain a first sulfur concentrate; the first sulfur roughing tailings are subjected to a second sulfur roughing to obtain a second sulfur roughing concentrate and a second sulfur roughing tailing, and the second sulfur roughing concentrate is subjected to a second sulfur beneficiation to obtain a second sulfur concentrate; the second sulfur roughing tailings are subjected to a sulfur scavenging to obtain a sulfur scavenging tailing; The sulfur scavenging tailings are subjected to sulfur and zinc roughing separation to obtain sulfur-zinc rough concentrate and sulfur-zinc rough tailings; the sulfur-zinc rough concentrate is subjected to sulfur and zinc mixed separation to obtain sulfur-zinc mixed concentrate, and the sulfur-zinc mixed concentrate is subjected to magnetic separation to obtain a third sulfur concentrate and a zinc concentrate.

2. The method for beneficiating sulfur-associated zinc ore according to claim 1, characterized in that: The sulfur content of the sulfur-associated zinc ore is not less than 28%, and the zinc content is not less than 0.3%.

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

4. The method for beneficiating sulfur-associated zinc ore according to claim 1, characterized in that: When the first sulfur roughing is performed, first sulfuric acid, a selective sulfur collector, and a first foaming agent are sequentially added to the ore pulp, and at least one of the following conditions is met: a. The concentration of the first sulfuric acid is 10-30wt%, and the amount is 1000-4000 g per ton of sulfur-associated zinc ore; b. The selective sulfur collector comprises at least one of ethyl sulfur nitrogen and ethyl xanthate, and the amount is 40-200 g per ton of sulfur-associated zinc ore; c. The first foaming agent includes at least one of methyl isobutyl carbinol, pine oil, pine alcohol, alcohols, and butyl ether alcohol, and the amount used is 4-40 grams per ton of sulfur-associated zinc ore.

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

6. The method for beneficiating sulfur-associated zinc ore according to claim 1, characterized in that: When the second sulfur roughing is carried out, the second sulfuric acid, the first sulfur collector, and the second frother are sequentially added to the first sulfur roughing tailings. The second sulfur roughing is carried out at least once and at least one of the following conditions is met: d. The concentration of the second sulfuric acid is 10-30wt%, and the amount is 500-2000 grams per ton of sulfur-associated zinc ore; e. The first sulfur collector comprises at least one of ethyl sulfur nitrogen, ethyl xanthate, and butyl xanthate, and the amount is 5-120 grams per ton of sulfur-associated zinc ore; f. The second foaming agent comprises at least one of methyl isobutyl carbinol, pine oil, pine alcohol, alcohols, and butyl ether alcohol, and the amount used is 4-40 grams per ton of sulfur-associated zinc ore.

7. The method for beneficiating sulfur-associated zinc ore according to claim 1, characterized in that: When the sulfur scavenging is performed, the third sulfuric acid and the second sulfur collector are sequentially added to the second sulfur roughing tailings, and at least one of the following conditions is met: g. The concentration of the third sulfuric acid is 10-30wt%, and the amount is 200-1000 grams per ton of sulfur-associated zinc ore; h. The second sulfur collector comprises at least one of ethyl thiocyanate, ethyl xanthate and butyl xanthate, and the dosage is 5-120 grams per ton of sulfur-associated zinc ore.

8. The method for beneficiating sulfur-associated zinc ore according to claim 1, characterized in that: When the sulfur-zinc roughing is performed, an activator and a sulfur-zinc collector are sequentially added to the sulfur scavenging tailings. The sulfur-zinc roughing is performed at least once and satisfies at least one of the following conditions: i. The activator comprises at least one of copper sulfate, copper nitrate and lead nitrate, and the amount is 20-500 g per ton of sulfur-associated zinc ore; j. The sulfur-zinc collector includes at least one of isopropyl xanthate, butyl xanthate and isopentyl xanthate, and the dosage is 20-100 grams per ton of sulfur-associated zinc ore.

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

10. The method for beneficiating sulfur-associated zinc ore according to any one of claims 1 to 9, characterized in that: After roasting the first sulfur concentrate, the second sulfur concentrate and the third sulfur concentrate, a high-grade iron ore concentrate product is obtained, and the sulfur-containing flue gas generated after roasting can be recycled to prepare sulfuric acid.

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