CN118045696A

CN118045696A - Beneficiation method for zinc oxide ore

Info

Publication number: CN118045696A
Application number: CN202410424547.8A
Authority: CN
Inventors: 尚衍波; 凌石生; 李超; 岳守艳; 李达; 张银雪
Original assignee: Beikuang Chemical Technology Cangzhou Co ltd; BGRIMM Technology Group Co Ltd
Current assignee: Beikuang Chemical Technology Cangzhou Co ltd; BGRIMM Technology Group Co Ltd
Priority date: 2024-04-10
Filing date: 2024-04-10
Publication date: 2024-05-17
Anticipated expiration: 2044-04-10
Also published as: CN118045696B

Abstract

The application provides a beneficiation method for zinc oxide ores, and particularly relates to the field of beneficiation. The method comprises the following steps: grinding and grading zinc oxide ore to obtain a coarse-grain product and a fine-grain product, and carrying out spiral chute roughing and shaking table concentration on the coarse-grain product to obtain zinc oxide concentrate A; desliming and floatation are carried out on the fine fraction product to obtain zinc oxide concentrate B, the zinc oxide concentrate A and the zinc oxide concentrate B are combined to obtain zinc oxide concentrate, and the collector used in the floatation comprises dodecyl amine, glacial acetic acid, methyl isobutyl carbinol, diesel oil and ethanol. The beneficiation method for the zinc oxide ore provided by the application adopts a combined process of respectively treating the thickness of the zinc oxide ore, can properly put coarse grinding fineness, is beneficial to reducing energy consumption and tailing sedimentation, and simultaneously fully plays the synergistic effect of the raw materials, and has the characteristics of easy water dissolution, good dispersibility, good foam friability and the like, and is environment-friendly without adding a large amount of hydrochloric acid for configuration when in use.

Description

Beneficiation method for zinc oxide ore

Technical Field

The application relates to the field of mineral separation, in particular to a mineral separation method of zinc oxide ores.

Background

Zinc oxide ore is an important zinc resource, but because of the complex mineral composition, fine embedding granularity and the large number of micro-particle embedding, the beneficiation of the zinc oxide ore becomes a challenging task.

Traditional beneficiation methods comprise gravity separation, flotation and the like, the gravity separation recovery rate is low, particularly zinc oxide ores embedded in fine particles, and the flotation method has the following problems: 1. zinc oxide ores are generally uneven in embedded granularity, zinc oxide ores with coarse embedded granularity and poor floatability are difficult to recover by a single flotation method, and the zinc oxide ores are easy to lose in tailings; 2. zinc oxide ores generally contain a large amount of easily-slimed gangue minerals with complex properties, the ore slimes seriously deteriorate flotation, the ore slimes are usually required to be deslimed before flotation, the desliming effect is poor or zinc oxide is easily mixed in the ore slimes to cause loss; 3. usually, an amine collector is used for floating zinc oxide minerals, but the collector has the problems of poor solubility and dispersibility, large dosage of the agent, low floatation recovery rate and the like.

Therefore, the development of the zinc oxide ore dressing method with high efficiency and strong adaptability has important practical significance and market value.

Disclosure of Invention

The application aims to provide a beneficiation method of zinc oxide ores, which aims to solve the problems.

In order to achieve the above object, the present application provides a beneficiation method of zinc oxide ores, comprising:

Grinding and grading zinc oxide ore to obtain coarse-fraction products and fine-fraction products;

carrying out spiral chute roughing and shaking table concentration on the coarse fraction product to obtain zinc oxide concentrate A;

Desliming the fine fraction product to obtain mineral mud and sand setting;

mixing the sand setting, the collecting agent, the regulator and the activating agent, and carrying out roughing to obtain roughing concentrate and roughing tailings;

Mixing the roughing tailings and the collector, and scavenging to obtain scavenging concentrate and scavenging tailings, wherein the scavenging concentrate is returned for roughing;

mixing the roughing concentrate with the regulator, and concentrating to obtain zinc oxide concentrate B;

combining the zinc oxide concentrate A and the zinc oxide concentrate B to obtain zinc oxide concentrate;

The collecting agent comprises the following raw materials in parts by weight: 30-50 parts of dodecyl amine, 45-75 parts of glacial acetic acid, 2-5 parts of methyl isobutyl carbinol, 5-10 parts of diesel oil and 5-10 parts of ethanol.

Optionally, the coarse fraction product has a particle size > 74 μm and the fine fraction product has a particle size of 74 μm or less.

Optionally, the spiral chute roughing is used for obtaining spiral chute roughing concentrate, spiral chute roughing middlings and tailings 1;

The spiral chute roughing concentrate is subjected to shaking table concentration;

the shaking table concentration also obtains shaking table concentration tailings;

and mixing the spiral chute roughing middlings with the shaking table concentrating tailings, regrinding, and returning to be used for classifying.

Optionally, the regrind has an endpoint particle size of less than or equal to 74 μm and a duty ratio of 80% -95%.

Optionally, the transverse gradient of the shaking table used in the shaking table refining is less than or equal to 10 degrees.

Optionally, the beneficiation method of zinc oxide ore satisfies at least one of the following conditions:

A. the desliming is carried out by adopting a cyclone;

B. the desliming is performed at least 2 times.

Optionally, the regulator comprises sodium carbonate and sodium hexametaphosphate, and the mass ratio of the sodium carbonate to the sodium hexametaphosphate is (10-15): 1.

Optionally, the activator comprises sodium sulfide.

A. the addition amount of the collecting agent in the coarse selection is 100g/t ore feeding-800 g/t ore feeding;

B. The addition amount of the activator in the coarse ore selection is 5000g/t ore feeding-15000 g/t ore feeding;

C. The addition amount of the regulator in the coarse ore feeding is 500g/t ore feeding-2000 g/t ore feeding;

D. The addition amount of the collecting agent in the scavenging is 30g/t ore feeding-100 g/t ore feeding;

E. The addition amount of the regulator in the refining is 100g/t ore feeding-500 g/t ore feeding.

A. The roughing is carried out at least 1 time;

B. the scavenging is performed at least 2 times;

C. The beneficiation is performed at least 3 times.

Compared with the prior art, the application has the beneficial effects that:

According to the beneficiation method for the zinc oxide ore, the zinc oxide ore is subjected to a coarse-fine separation combined process, coarse-grain zinc oxide is recovered by a gravity separation method, fine-grain zinc oxide is recovered by a flotation method, coarse-grain zinc oxide and fine-grain zinc oxide in the zinc oxide ore are effectively recovered, the problem of simultaneous recovery of coarse-grain zinc oxide and fine-grain zinc oxide in beneficiation is effectively solved, zinc oxide is effectively recovered, the defect that recovery rate is low due to the fact that fine-grain zinc oxide cannot be recovered by a traditional single gravity separation process is overcome, and the defect that recovery rate is low due to the fact that coarse-grain zinc oxide cannot be recovered by single flotation is also overcome; secondly, the influence of the mineral mud on flotation is eliminated by carrying out pretreatment desliming on the fine-grained material, the process adaptability is strong, and the influence of different granularity of mineral embedded cloth is less; then, the zinc oxide ores with different particle diameters can be subjected to strengthening treatment, when the content of coarse-size zinc oxide in the minerals is high, the zinc oxide can be recovered in a coarse-size reselection link, and when the content of fine-size zinc oxide in the minerals is high, the zinc oxide can be recovered by adopting pretreatment desliming and fine-size floatation links, so that the recovery of the coarse-size zinc oxide and the fine-size zinc oxide is ensured, and the total recovery rate of the zinc oxide is improved; the application provides a collector which can fully exert the synergistic effect of the dodecyl amine, the glacial acetic acid, the methyl isobutyl carbinol, the diesel oil and the ethanol, and the electrostatic effect of the dodecyl amine of a cationic collector is combined with the anionic groups on the surface of zinc oxide mineral to enhance the adhesion of minerals and foam, the glacial acetic acid reacts with the dodecyl amine to obtain the water-soluble dodecyl amine acetate, the collecting capacity of the collector on the zinc oxide mineral in ore pulp can be enhanced, the diesel oil can form oil drops in the ore pulp and act with the hydrophobic groups on the surface of the zinc oxide mineral, and the ethanol can be used as a cosolvent to promote the dissolution and dispersion of the dodecyl amine collector in the ore pulp, so that the utilization rate of the collector is improved; the synergistic effect of the components of the collector keeps the collecting capacity of the traditional amine collector, and remarkably improves the water solubility, the dispersibility and the foam friability, and the friability not only helps to improve the concentrate grade, but also helps to convey and treat the foam, so that the efficient mineral separation effect is realized; the zinc oxide collector provided by the application can be directly added in flotation operation without adding a large amount of hydrochloric acid, so that the dosage of the collector can be reduced, the environment is friendly, the cost of the agent is low, and a better sorting effect can be achieved with a smaller dosage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the present application.

Fig. 1 is a schematic flow chart of the beneficiation process in example 1.

Detailed Description

The term as used herein:

"prepared from … …" is synonymous with "comprising". The terms "comprising," "including," "having," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, step, method, article, or apparatus.

The conjunction "consisting of … …" excludes any unspecified element, step or component. If used in a claim, such phrase will cause the claim to be closed, such 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 claim body, rather than immediately following the subject, it is limited to only the elements described in that clause; other elements are not excluded from the stated claims as a whole.

When an equivalent, concentration, or other value or parameter is expressed as a range, preferred range, or a range bounded by a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when ranges of "1 to 5" are disclosed, the described ranges should be construed to include ranges of "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a numerical range is described herein, unless otherwise indicated, the range is intended to include its endpoints and all integers and fractions within the range.

In these examples, the parts and percentages are by mass unless otherwise indicated.

"Parts by mass" means a basic unit of measurement showing the mass ratio of a plurality of components, and 1 part may be any unit mass, for example, 1g, 2.689g, or the like. If we say that the mass part of the a component is a part and the mass part of the B component is B part, the ratio a of the mass of the a component to the mass of the B component is represented as: b. or the mass of the A component is aK, the mass of the B component is bK (K is any number and represents a multiple factor). It is not misunderstood that the sum of the parts by mass of all the components is not limited to 100 parts, unlike the parts by mass.

"And/or" is used to indicate that one or both of the illustrated cases may occur, e.g., a and/or B include (a and B) and (a or B).

The application provides a beneficiation method of zinc oxide ores, which comprises the following steps:

Desliming the fine fraction product to obtain mineral mud and sand setting;

Alternatively, the raw materials of the collector may be 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts or any value between 30 parts and 50 parts by weight, the glacial acetic acid may be 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts or any value between 45 parts and 75 parts, methyl isobutyl carbinol may be any value between 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts, 3.1 parts, 3.2 parts, 3.3 parts, 3.4 parts, 3.5 parts, 3.6 parts, 3.7 parts, 3.8 parts, 3.9 parts, 4 parts, 4.1 parts, 4.2 parts, 4.3 parts, 4.4 parts, 4.5 parts, 4.6 parts, 4.7 parts, 4.8 parts, 4.9 parts, 5 parts or 2 parts to 5 parts, the diesel fuel may be 5 parts, 5.1 parts, 5.2 parts, 5.3 parts, 5.4 parts, 5.5 parts, 5.6 parts, 5.7 parts, 5.8 parts, 5.9 parts, 6.1 parts, 6.2 parts, 6.3 parts, 6.4 parts, 6.5 parts, 6.6 parts, 6.7 parts, 6.8 parts, 6.9 parts, 7 parts, 7.1 parts, 7.2 parts, 7.3 parts, 7.4 parts, 7.5 parts, 7.6 parts, 7.7 parts, 7.8 parts, 7.9 parts, 8 parts, 8.1 parts, 8.2 parts, 8.3 parts, 8.4 parts, 8.5 parts, 8.6 parts, 8.7 parts, 8.8 parts, 8.9 parts, 9.1 parts, 9.2 parts, 9.3 parts, 9.4 parts, 9.5 parts, 9.6, 9.7 parts, 9.7, 9.8, 9.9.10 parts, 10 or any value between 5 and 10, ethanol can be 5 parts, 5.1 parts, 5.2 parts, 5.3 parts, 5.4 parts, 5.5 parts, 5.6 parts, 5.7 parts, 5.8 parts, 5.9 parts, 6 parts, 6.1 parts, 6.2 parts, 6.3 parts, 6.4 parts, 6.5 parts, 6.6 parts, 6.7 parts, 6.8 parts, 6.9 parts, 7 parts, 7.1 parts, 7.2 parts, 7.3 parts, 7.4 parts, 7.5 parts, 7.6 parts, 7.7 parts, 7.8 parts, 7.9 parts, 8.1 parts, 8.2 parts, 8.3 parts, 8.4 parts, 8.5 parts, 8.6 parts, 8.7 parts, 8.8 parts, 8.9 parts, 9.1 parts, 9.2 parts, 9.3 parts, 9.4 parts, 9.5 parts, 9.6 parts, 9.7 parts, 9.8, 9.9.10 parts, or any value between 10 and 10 parts.

The application is worth to describe, through adopting the combined process of grinding, coarse-fine grading, coarse-grain gravity separation, fine-grain cyclone desliming and coarse-fine separate treatment of flotation to zinc oxide ore, use the gravity separation method to recycle coarse-grain zinc oxide, use the flotation method to recycle fine-grain zinc oxide, effectively recycle coarse fraction and fine fraction in zinc oxide ore, effectively solve the difficult problem of concentrating coarse-grain zinc oxide and fine-grain zinc oxide and recycle zinc oxide at the same time, and recycle zinc oxide ore with high efficiency.

It should be noted that the zinc oxide ore of the present application may be crushed and ground ore or other zinc oxide-containing ore according to the technological process.

In some embodiments, the coarse fraction product has a particle size > 74 μm and the fine fraction product has a particle size of 74 μm or less.

It should be noted that when the particle size of the coarse fraction product is > 74 μm, these coarse fraction minerals have a relatively high sedimentation velocity due to the larger particles and are therefore more easily separated from the medium during the reselection process, thus achieving an efficient recovery; when the particle size of the fine fraction product is 74 μm or less, these fine slimes are difficult to be effectively recovered by a sorting method based on the difference in particle density during the reselection due to the extremely fine particle size, because of their slow sedimentation rate in suspension.

Alternatively, the particle size of the coarse fraction product may be 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 150 μm, 200 μm, 500 μm, 1000 μm or any value > 74 μm, and the particle size of the fine fraction product may be 0.01 μm, 0.1 μm, 1 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 74 μm or any value less than or equal to 74 μm.

It should be noted that coarse fraction products and fine fraction products are clusters of particles within the defined size range of the present application, not just clusters comprising single size particles, e.g. coarse fraction products are clusters of solid particles having a size in the range of 100-200 μm, and so on.

In some embodiments, the spiral chute rougher produces a spiral chute rougher concentrate, a spiral chute rougher middling and tailings 1;

It should be noted that the spiral chute roughing and the shaking table refining are combined for use, so that the respective advantages can be fully exerted, and the efficiency of the whole beneficiation operation is improved. The spiral chute has the advantages of high separation efficiency, high processing capacity, simple and convenient operation, strong adaptability, low cost and the like, and a large amount of tailings and waste rocks can be removed rapidly through rough concentration of the spiral chute, so that the amount of materials entering a shaking table for concentration is reduced, and the mineral separation cost is reduced. Meanwhile, the concentration of the shaking table can further improve the grade and the recovery rate of the concentrate, and the maximum utilization of resources is realized.

In some embodiments, the regrind has an endpoint particle size of less than or equal to 74 μm in a ratio of 80% to 95%.

Alternatively, the end point particle size of the regrind may be 74 μm or less, or any value between 80%、80.2%、80.4%、80.6%、80.8%、81%、81.2%、81.4%、81.6%、81.8%、82%、82.2%、82.4%、82.6%、82.8%、83%、83.2%、83.4%、83.6%、83.8%、84%、84.2%、84.4%、84.6%、84.8%、85%、85.2%、85.4%、85.6%、85.8%、86%、86.2%、86.4%、86.6%、86.8%、87%、87.2%、87.4%、87.6%、87.8%、88%、88.2%、88.4%、88.6%、88.8%、89%、89.2%、89.4%、89.6%、89.8%、90%、90.2%、90.4%、90.6%、90.8%、91%、91.2%、91.4%、91.6%、91.8%、92%、92.2%、92.4%、92.6%、92.8%、93%、93.2%、93.4%、93.6%、93.8%、94%、94.2%、94.4%、94.6%、94.8%、95% or 80% -95%.

It should be noted that the endpoint particle size of regrind is 80% -95% of the 74 μm or less. In the process of ore dressing, the target mineral and gangue mineral are continuously grown because of thicker granularity, in order to improve the ore dressing index, the middling needs to be regrind to finer fineness to ensure dissociation, and 80% -95% -74um fineness is finer to ensure dissociation of the target mineral, so that the subsequent ore dressing is ensured to obtain better ore dressing index.

In some embodiments, the lateral slope of the shaker used in the shaker refinement is less than or equal to 10 °.

Alternatively, the lateral gradient of the shaking table used in the shaking table refinement may be any value of 10 °,9 °, 8 °,7 °,6 °,5 °,4 °,3 °,2 °,1 °, or 10 °.

It should be noted that the horizontal gradient of the shaking table used in the shaking table is less than or equal to 10 degrees. The smaller transverse slope helps to slow down the flow rate of the pulp over the bed surface, allowing more time for mineral particles to delaminate and separate on the bed surface according to density and particle size differences, which helps to increase the separation efficiency, allowing for more efficient separation of the mineral of interest from gangue minerals. Meanwhile, vibration and noise of the shaking table in the running process can be reduced, and stability and reliability of the equipment are improved.

In some embodiments, the beneficiation process of zinc oxide ore meets at least one of the following conditions:

A. the desliming is carried out by adopting a cyclone;

It should be noted that because of the different particle sizes and densities of the fine slime and coarse sand, the centrifugal forces to which they are subjected are also different, when the slime-containing pulp enters the cyclone by pressure or gravity, the coarse sand is thrown to the vicinity of the wall due to the larger centrifugal force, and is discharged from the bottom sand settling port along with the external spiral flow; the mineral mud has low density, low centrifugal force and low sedimentation speed, and finally stays in the spiral flow for a long time and is discharged from the overflow port; the cyclone can efficiently separate mineral mud from ore pulp. Secondly, the cyclone has the advantages of simple structure, convenient operation, large treatment capacity, high separation efficiency and the like. This allows the cyclone to maintain a stable desliming effect when handling large volumes of pulp, while reducing the complexity of operation and maintenance.

B. the desliming is performed at least 2 times.

It should be noted that the desliming is performed at least 2 times. In the beneficiation process, desliming is an important pretreatment step, aiming at removing the fine particle fraction in the ore so as to improve the efficiency of the subsequent beneficiation operation. The cyclone is adopted for desliming, and at least 2 desliming treatments are carried out, so that the separation efficiency can be improved, the concentrate quality can be improved, the equipment life can be prolonged, the energy consumption and the cost can be reduced, and the more efficient, economical and sustainable ore dressing process can be realized.

Alternatively, the number of desliming may be any value of 2 times, 3 times, 4 times, 5 times, 10 times, 20 times, or 2 times or more.

In some embodiments, the modifier comprises sodium carbonate and sodium hexametaphosphate in a mass ratio of (10-15): 1.

It should be noted that sodium carbonate not only adjusts the pH value of ore pulp and promotes the hydrophobicity of mineral surfaces, but also plays roles of precipitating calcium and magnesium ions and the like, and is helpful for reducing the interference of calcium and magnesium ions in the mineral separation process. Sodium hexametaphosphate is polyphosphate and has strong dispersing ability; in the mineral separation process, a small amount of sodium hexametaphosphate can achieve a good dispersing effect; the method can prevent agglomeration among ore particles, improve the stability of ore pulp, and generate hydrophilic chelate with metal ions on the surface of the ore slurry so as to inhibit the ore slurry, thereby being beneficial to mineral separation. In addition, sodium hexametaphosphate is also capable of inhibiting many minerals including calcite, limestone, quartz, silicates, and the like. When the sodium carbonate and the sodium hexametaphosphate are matched according to a certain proportion (such as 10-15:1), a synergistic effect can be exerted, and the dispersion effect of the mineral mud is improved.

Alternatively, the mass ratio of sodium carbonate to sodium hexametaphosphate can be 10:1、10.1:1、10.2:1、10.3:1、10.4:1、10.5:1、10.6:1、10.7:1、10.8:1、10.9:1、11:1、11.1:1、11.2:1、11.3:1、11.4:1、11.5:1、11.6:1、11.7:1、11.8:1、11.9:1、12:1、12.1:1、12.2:1、12.3:1、12.4:1、12.5:1、12.6:1、12.7:1、12.8:1、12.9:1、13:1、13.1:1、13.2:1、13.3:1、13.4:1、13.5:1、13.6:1、13.7:1、13.8:1、13.9:1、14:1、14.1:1、14.2:1、14.3:1、14.4:1、14.5:1、14.6:1、14.7:1、14.8:1、14.9:1、15:1 or any value between (10-15): 1.

In some embodiments, the activator comprises sodium sulfide.

When the flotation process needs to be carried out, stirring and mixing can be carried out every time one reagent is added.

Alternatively, the process may be carried out in a single-stage, the addition amount of the collecting agent in roughing can be 100g/t of ore, 110g/t of ore, 120g/t of ore, 130g/t of ore, 140g/t of ore, 150g/t of ore, 160g/t of ore, 170g/t of ore, 180g/t of ore, 190g/t of ore, 200g/t of ore, 210g/t of ore, 220g/t of ore, 230g/t of ore, 240g/t of ore, 250g/t of ore, 260g/t of ore, 270g/t of ore, 280g/t of ore, 290g/t of ore, 300g/t of ore, 310g/t of ore, 320g/t of ore, 330g/t of ore, 340g/t of ore, 350g/t of ore, 360g/t of ore, 370g/t of ore, 380g/t of ore, 390g/t of ore 400g/t ore feeding, 410g/t ore feeding, 420g/t ore feeding, 430g/t ore feeding, 440g/t ore feeding, 450g/t ore feeding, 460g/t ore feeding, 470g/t ore feeding, 480g/t ore feeding, 490g/t ore feeding, 500g/t ore feeding, 510g/t ore feeding, 520g/t ore feeding, 530g/t ore feeding, 540g/t ore feeding, 550g/t ore feeding, 560g/t ore feeding, 570g/t ore feeding, 580g/t ore feeding, 590g/t ore feeding, 600g/t ore feeding, 610g/t ore feeding, 620g/t ore feeding, 630g/t ore feeding, 640g/t ore feeding, 650g/t ore feeding, 660g/t ore feeding, 670g/t ore feeding, 680g/t ore feeding, 690g/t ore feeding, 700g/t ore feeding, 710g/t ore feeding, 720g/t feeding, 730g/t feeding, 740g/t feeding, 750g/t feeding, 760g/t feeding, 770g/t feeding, 780g/t feeding, 790g/t feeding, 800g/t feeding or any value between 100g/t feeding and 800g/t feeding;

Alternatively, the process may be carried out in a single-stage, the activator in roughing may be added in an amount of 5000g/t, 5100g/t, 5200g/t, 5300g/t, 5400g/t, 5500g/t, 5600g/t, 5700g/t, 5800g/t, 5900g/t, 6000g/t, 6100g/t, 6200g/t, 6300g/t, 6400g/t, 6500g/t, 6600g/t, 6700g/t, 6800g/t, 6900g/t, 7000g/t, 7100g/t, 7200g/t, 7300g/t, 7400g/t, 7500g/t, 7600g/t, 7700g/t, 7900g/t, etc 8000g/t, 8100g/t, 8200g/t, 8300g/t, 8400g/t, 8500g/t, 8600g/t, 8700g/t, 8800g/t, 8900g/t, 9000g/t, 9100g/t, 9200g/t, 9300g/t, 9400g/t, 9500g/t, 9600g/t, 9700g/t, 9800g/t, 9900g/t, 10000g/t, 10100g/t, 10200g/t, 10300g/t, 10400g/t, 10500g/t, 10700g/t, 10800g/t, 10900g/t, 11100g/t, 11000g/t, and so on, 11200g/t, 11300g/t, 11400g/t, 11500g/t, 11600g/t, 11700g/t, 11800g/t, 11900g/t, 12000g/t, 12100g/t, 12200g/t, 12300g/t, 12400g/t, 12500g/t, 12600g/t, 12700g/t, 12800g/t, 12900g/t, 13000g/t, 13100g/t, 13200g/t, 13300g/t of ore, 13400g/t of ore, 13500g/t of ore, 13600g/t of ore, 13700g/t of ore, 13800g/t of ore, 13900g/t of ore, 14000g/t of ore, 14100g/t of ore, 14200g/t of ore, 14300g/t of ore, 14400g/t of ore, 14500g/t of ore, 14600g/t of ore, 14700g/t of ore, 14800g/t of ore, 14900g/t of ore, 15000g/t of ore, or 5000g/t of ore to 15000g/t of ore;

Alternatively, the process may be carried out in a single-stage, the addition amount of the regulator in roughing can be 500g/t, 520g/t, 550g/t, 580g/t, 600g/t, 620g/t, 650g/t, 680g/t, 700g/t, 720g/t, 750g/t, 780g/t, 800g/t, 820g/t, 850g/t, 880g/t, 900g/t, 920g/t, 950g/t, 980g/t, 1000g/t, 1020g/t, 1050g/t, 1080g/t, 1100g/t, 1120g/t, 1150g/t, 1180g/t, 1200g/t, 1220g/t 1250g/t ore, 1280g/t ore, 1300g/t ore, 1320g/t ore, 1350g/t ore, 1380g/t ore, 1400g/t ore, 1420g/t ore, 1450g/t ore, 1480g/t ore, 1500g/t ore, 1520g/t ore, 1550g/t ore, 1580g/t ore, 1600g/t ore, 1620g/t ore, 1650g/t ore, 1680g/t ore, 1700g/t ore, 1720g/t ore, 1750g/t ore, 1780g/t ore, 1800g/t ore, 1820g/t ore, 1850g/t ore, 1880g/t ore, 1900g/t ore, 1920g/t ore, 1950g/t ore, 1980g/t ore, 2000g/t feeding or any value between 500g/t feeding and 2000g/t feeding;

Optionally, the collector may be added in an amount of 30g/t, 35g/t, 40g/t, 45g/t, 50g/t, 55g/t, 60g/t, 65g/t, 70g/t, 75g/t, 80g/t, 85g/t, 90g/t, 100g/t, or any value between 30g/t and 100 g/t;

Alternatively, the modifier may be added to the beneficiation at any value between 100g/t, 120g/t, 140g/t, 160g/t, 180g/t, 200g/t, 220g/t, 240g/t, 260g/t, 280g/t, 300g/t, 320g/t, 340g/t, 360g/t, 380g/t, 400g/t, 420g/t, 440g/t, 460g/t, 480g/t, 500g/t, or 100 g/t.

A. The roughing is carried out at least 1 time;

Alternatively, the number of roughings may be any value of 1,2, 3, 4, 5, 10, 20, or 1 or more times;

B. the scavenging is performed at least 2 times;

Alternatively, the number of times of the scavenging may be any value of 2 times, 3 times, 4 times, 5 times, 10 times, 20 times, or 2 times or more;

note that the scavenging is performed at least 2 times. By performing at least 2 sweeps, it is ensured that more zinc oxide mineral particles are recovered. In the first sweep, some zinc oxide minerals may be misjudged as tailings and run off, while in the second sweep, there is a chance that these insufficiently recovered minerals are recovered again, thereby improving overall recovery.

C. The beneficiation is performed at least 3 times.

Alternatively, the number of beneficiations can be 3,4, 5, 6, 7, 8, 9, 10, 20, or any value 3 or more.

Note that the beneficiation is performed at least 3 times. The main purpose of the concentration is to further remove impurities from the coarse concentrate obtained by flotation and improve the grade of the concentrate. By performing the concentration at least 3 times, a more thorough removal of gangue, impurities and other unwanted minerals from the coarse concentrate is ensured, thereby improving the grade of the final concentrate.

Embodiments of the present application will be described in detail below with reference to specific examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present application and should not be construed as limiting the scope of the present application. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.

Example 1

The embodiment provides a beneficiation method of zinc oxide ores, which aims at a certain zinc oxide ore (Zn-containing grade is 4.29%) in Sichuan, and specifically comprises the following steps:

(1) Grinding the zinc oxide raw ore by a ball mill until the content of-0.074 mm is 55%, and then feeding the zinc oxide raw ore into a high-frequency vibrating screen to obtain a +0.074mm coarse fraction product and a-0.074 mm fine fraction product;

(2) The +0.074mm coarse fraction product obtained in the step (1) is subjected to rough concentration by adopting a spiral chute and concentration by adopting a shaking table to obtain concentrate A, the spiral chute middlings and the shaking table tailings are combined and enter a ball mill to be ground again until the-0.074 mm content is 90%, and then returned to a high-frequency vibrating screen to be combined and graded with the raw ore ground material, wherein the spiral chute tailings are used as tailings 1;

(3) The fine-fraction product of-0.074 mm obtained in the step (2) enters a cyclone for desliming treatment, and mineral mud and sand setting are produced;

(4) Carrying out flotation on the settled sand obtained in the step (3) to obtain flotation concentrate B and flotation tailings 2, wherein the flotation concentrate B and the concentrate A obtained in the step (2) are combined to be used as zinc oxide concentrate, and the flotation tailings 2 and the coarse-grain spiral chute tailings 1 obtained in the step (2) and the slime obtained in the step (3) are combined to be used as tailings;

The flotation is carried out by adopting a flow of coarse and fine sweeping, and specifically comprises the following steps:

The primary roughing comprises the following steps: adding a regulator, an activator and a collector into the ore pulp to carry out flotation on zinc oxide minerals to obtain primary roughing concentrate and primary roughing tailings; the primary roughing tailings are used as ore feeding for primary scavenging, and the primary roughing concentrate is used as ore feeding for concentration; the collector comprises, by mass, 40 parts of dodecylamine, 60 parts of glacial acetic acid, 3 parts of methyl isobutyl carbinol, 8 parts of diesel oil and 10 parts of ethanol, wherein the regulator is sodium carbonate and sodium hexametaphosphate which are mixed according to a mass ratio of 10:1, and the activator is sodium sulfide; according to the ore feeding amount, the addition amount of the regulator is 1000g/t, the addition amount of the activating agent is 8000g/t, and the addition amount of the collecting agent is 300g/t;

And (3) secondary scavenging: the primary scavenging is to add a collector into the primary roughing tailings to carry out floatation on zinc oxide minerals, so as to obtain primary scavenging concentrate and primary scavenging tailings; the primary scavenging tailings serve as ore feeding for secondary scavenging, and the primary scavenging concentrate serves as middling and returns to primary roughing operation; wherein, according to the ore feeding amount, the adding amount of the collecting agent is 60g/t; the secondary scavenging includes: adding a collector into the primary scavenging tailings to carry out flotation on zinc oxide minerals, so as to obtain secondary scavenging concentrate and secondary scavenging tailings; the tailings obtained by secondary scavenging are used as tailings 2, and the concentrate obtained by secondary scavenging is used as middling and returns to primary scavenging operation; wherein, according to the ore feeding amount, the adding amount of the collecting agent is 30g/t;

Three times of carefully selecting: the primary roughing concentrate is used as a primary concentrating feed ore to be concentrated to obtain primary concentrating concentrate and primary concentrating tailings, wherein the addition amount of the regulator is 300g/t according to the feed ore amount; the primary concentration tailings return to primary roughing operation, and the primary concentration concentrate is used as a secondary concentration feed for concentration to obtain secondary concentration concentrate and secondary concentration tailings, wherein the addition amount of the regulator is 150g/t according to the feed amount; the secondary concentrating tailings return to primary concentrating operation, and the secondary concentrating concentrate is used as a feed for tertiary concentrating to obtain tertiary concentrating concentrate and tertiary concentrating tailings, wherein the addition amount of the regulator is 80g/t according to the feed amount; the tertiary concentrate is used as zinc oxide concentrate 2, and the tertiary tailings are returned to the secondary concentration operation.

The flow chart of the beneficiation method of the embodiment is shown in fig. 1.

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 28.47 percent through detection, and the recovery rate is 77.65 percent.

Example 2

The embodiment provides a beneficiation method for zinc oxide ores, which aims at a certain zinc oxide ore (Zn-containing grade is 3.37%) in inner Mongolia, and specifically comprises the following steps:

(1) Grinding the raw ore by a ball mill until the content of-0.074 mm is 60%, and then feeding the raw ore into a high-frequency vibrating screen to obtain a +0.074mm coarse fraction product and a-0.074 mm fine fraction product;

(2) The +0.074mm coarse fraction product obtained in the step (1) is subjected to rough concentration by adopting a spiral chute and concentration by adopting a shaking table to obtain concentrate A, the spiral chute middlings and the shaking table tailings are combined and enter a ball mill to be ground again until the-0.074 mm content is 92%, and then returned to a high-frequency vibrating screen to be combined and graded with the raw ore ground material, wherein the spiral chute tailings are used as tailings 1;

The primary roughing comprises the following steps: adding a regulator, an activator and a collector into the ore pulp to carry out flotation on zinc oxide minerals to obtain primary roughing concentrate and primary roughing tailings; the primary roughing tailings are used as ore feeding for primary scavenging, and the primary roughing concentrate is used as ore feeding for concentration; the collector comprises, by mass, 45 parts of dodecylamine, 68 parts of glacial acetic acid, 4 parts of methyl isobutyl carbinol, 9 parts of diesel oil and 8 parts of ethanol, wherein the regulator is sodium carbonate and sodium hexametaphosphate which are mixed according to a mass ratio of 12:1, and the activator is sodium sulfide; according to the ore feeding amount, the addition amount of the regulator is 1500g/t, the addition amount of the activating agent is 10000g/t, and the addition amount of the collecting agent is 250g/t;

And (3) secondary scavenging: the primary scavenging is to add a collector into the primary roughing tailings to carry out floatation on zinc oxide minerals, so as to obtain primary scavenging concentrate and primary scavenging tailings; the primary scavenging tailings serve as ore feeding for secondary scavenging, and the primary scavenging concentrate serves as middling and returns to primary roughing operation; wherein, according to the ore feeding amount, the adding amount of the collecting agent is 50g/t; the secondary scavenging includes: adding a collector into the primary scavenging tailings to carry out flotation on zinc oxide minerals, so as to obtain secondary scavenging concentrate and secondary scavenging tailings; the tailings obtained by secondary scavenging are used as tailings 2, and the concentrate obtained by secondary scavenging is used as middling and returns to primary scavenging operation; wherein, preferably, the addition amount of the collecting agent is 25g/t according to the ore feeding amount;

Three times of carefully selecting: the primary roughing concentrate is used as a primary concentrating feed ore to be concentrated to obtain primary concentrating concentrate and primary concentrating tailings, wherein the addition amount of the regulator is 300g/t according to the feed ore amount; the primary concentration tailings return to primary roughing operation, and the primary concentration concentrate is used as feed for secondary concentration to carry out concentration, so as to obtain secondary concentration concentrate and secondary concentration tailings, wherein the addition amount of the regulator is 200g/t according to the feed amount; the secondary concentrating tailings return to primary concentrating operation, and the secondary concentrating concentrate is used as feed for tertiary concentrating to obtain tertiary concentrating concentrate and tertiary concentrating tailings, wherein the addition amount of the regulator is 100g/t according to the feed amount; the tertiary concentrate is used as zinc oxide concentrate 2, and the tertiary tailings are returned to the secondary concentration operation.

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 26.27 percent through detection, and the recovery rate is 76.58 percent.

Example 3

The embodiment provides a beneficiation method for zinc oxide ores, which aims at a certain zinc oxide ore (Zn-containing grade is 4.78%) in Yunnan, and specifically comprises the following steps:

(1) Grinding the raw ore by a ball mill until the content of-0.074 mm is 58%, and then feeding the raw ore into a high-frequency vibrating screen to obtain a +0.074mm coarse fraction product and a-0.074 mm fine fraction product;

(2) The +0.074mm coarse fraction product obtained in the step (1) is subjected to rough concentration by adopting a spiral chute and concentration by adopting a shaking table to obtain concentrate A, the spiral chute middlings and the shaking table tailings are combined and enter a ball mill to be ground again until the-0.074 mm content is 88%, and then returned to a high-frequency vibrating screen to be combined and graded with the raw ore ground material, wherein the spiral chute tailings are used as tailings 1;

The primary roughing comprises the following steps: adding a regulator, an activator and a collector into the ore pulp to carry out flotation on zinc oxide minerals to obtain primary roughing concentrate and primary roughing tailings; the primary roughing tailings are used as ore feeding for primary scavenging, and the primary roughing concentrate is used as ore feeding for concentration; the collector comprises, by mass, 43 parts of dodecylamine, 65 parts of glacial acetic acid, 5 parts of methyl isobutyl carbinol, 10 parts of diesel oil and 7 parts of ethanol, wherein the regulator is sodium carbonate and sodium hexametaphosphate which are mixed according to a mass ratio of 14:1, and the activator is sodium sulfide; according to the ore feeding amount, the addition amount of the regulator is 1800g/t, the addition amount of the activating agent is 12000g/t, and the addition amount of the collecting agent is 350g/t;

and (3) secondary scavenging: the primary scavenging is to add a collector into the primary roughing tailings to carry out floatation on zinc oxide minerals, so as to obtain primary scavenging concentrate and primary scavenging tailings; the primary scavenging tailings serve as ore feeding for secondary scavenging, and the primary scavenging concentrate serves as middling and returns to primary roughing operation; wherein, according to the ore feeding amount, the adding amount of the collecting agent is 60g/t; the secondary scavenging includes: adding a collector into the primary scavenging tailings to carry out flotation on zinc oxide minerals, so as to obtain secondary scavenging concentrate and secondary scavenging tailings; the tailings obtained by secondary scavenging are used as tailings 2, and the concentrate obtained by secondary scavenging is used as middling and returns to primary scavenging operation; wherein, preferably, the addition amount of the collecting agent is 30g/t according to the ore feeding amount;

Three times of carefully selecting: the primary roughing concentrate is used as a primary concentrating feed ore to be concentrated to obtain primary concentrating concentrate and primary concentrating tailings, wherein the addition amount of the regulator is 400g/t according to the feed ore amount; the primary concentration tailings return to primary roughing operation, and the primary concentration concentrate is used as feed for secondary concentration to carry out concentration, so as to obtain secondary concentration concentrate and secondary concentration tailings, wherein the addition amount of the regulator is 200g/t according to the feed amount; the secondary concentrating tailings return to primary concentrating operation, and the secondary concentrating concentrate is used as feed for tertiary concentrating to obtain tertiary concentrating concentrate and tertiary concentrating tailings, wherein the addition amount of the regulator is 100g/t according to the feed amount; the tertiary concentrate is used as zinc oxide concentrate 2, and the tertiary tailings are returned to the secondary concentration operation.

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 28.12 percent through detection, and the recovery rate is 78.82 percent.

Comparative example 1

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the comparative example did not carry out classification operation, and ore pulp was directly subjected to flotation after grinding, and other conditions were the same as in example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 10.16 percent through detection, and the recovery rate is 42.37 percent.

Comparative example 2

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: without classification, the slurry was desliming by a cyclone and subjected to flotation, other conditions being consistent with example 1;

by adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 22.37 percent through detection, and the recovery rate is 62.35 percent.

Comparative example 3

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the fine fraction material in the step (3) is subjected to flotation after desliming by a centrifugal machine, and other conditions are the same as those of the embodiment 1;

by adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 26.11 percent through detection, and the recovery rate is 72.38 percent.

As is clear from the comparative example, the centrifugal machine can realize desliming, but the working principle and structure are different from those of the cyclone, and the centrifugal machine mainly realizes solid-liquid separation by centrifugal force generated by high-speed rotation. However, in processing mineral slurries containing minerals of very small particle size, the centrifuge may not be able to achieve efficient separation as a cyclone, and furthermore, the operation and maintenance of the centrifuge may be relatively complex and the processing capacity may be somewhat limited.

The reason that the desliming effect of the cyclone is better than that of the centrifugal machine in the embodiment 1 of the application is mainly that the working principle and the structural characteristics of the cyclone enable the cyclone to separate mineral mud from ore pulp more efficiently, and the cyclone has the advantages of simple operation, large processing capacity and the like.

Comparative example 4

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector was replaced with an equal amount of dodecylamine, the other conditions being the same as in example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 20.46 percent through detection, and the recovery rate is 66.17 percent.

Comparative example 5

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector was replaced with an equivalent amount of octadecylamine, with the other conditions consistent with example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 18.67 percent through detection, and the recovery rate is 68.67 percent.

Comparative example 6

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was free of diesel oil and otherwise identical to example 1;

by adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 21.64 percent through detection, and the recovery rate is 72.24 percent.

Comparative example 7

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was free of methyl isobutyl carbinol and the other conditions were the same as in example 1;

by adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 26.36 percent through detection, and the recovery rate is 71.37 percent.

Comparative example 8

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was free of ethanol and otherwise identical to that of example 1;

by adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 22.76 percent, and the recovery rate of zinc oxide is 73.15 percent through detection.

Comparative example 9

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was prepared by substituting the equivalent amount of octadecylamine for dodecylamine in the raw material, and the other conditions were the same as in example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 22.21 percent, and the recovery rate of zinc oxide is 73.81 percent through detection.

Comparative example 10

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was prepared by substituting equivalent amounts of cocoamine for dodecylamine in the feed stock, with the other conditions consistent with example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 24.31 percent through detection, and the recovery rate of zinc oxide is 74.38 percent.

Comparative example 11

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was prepared by substituting glacial acetic acid in the raw material with an equivalent amount of hydrochloric acid, and the other conditions were the same as in example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 22.36% t through detection, and the recovery rate of zinc oxide is 72.15%.

Comparative example 12

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was prepared by replacing the diesel fuel in the feed with an equal amount of kerosene, the other conditions being the same as in example 1;

by adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 24.38 percent through detection, and the recovery rate of zinc oxide is 73.31 percent.

Comparative example 13

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was prepared by substituting methyl isobutyl carbinol in the feed with an equivalent amount of No. 2 oil, and the other conditions were the same as in example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 22.37 percent through detection, and the recovery rate of zinc oxide is 74.21 percent.

Comparative example 14

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the collector of this comparative example was prepared by substituting the ethanol in the feed with an equivalent amount of ethylene glycol, with the other conditions consistent with example 1;

by adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 23.36 percent through detection, and the recovery rate of zinc oxide is 74.42 percent.

Comparative example 15

This comparative example provides a beneficiation method for zinc oxide ores, which differs from example 1 in that: the regulator of example 1 was replaced with water glass, the other conditions being identical to those of example 1;

By adopting the beneficiation method, the Zn content in the obtained zinc oxide concentrate is 20.17 percent, and the recovery rate of zinc oxide is 71.45 percent through detection.

As is apparent from the results of the above examples and comparative examples, by adopting a combined process of grinding, coarse-fine classification, coarse-grain gravity separation, fine-grain cyclone desliming and coarse-grain separate treatment of flotation on zinc oxide ore raw ore, recovering coarse-grain zinc oxide by a gravity separation method, recovering fine-grain zinc oxide by a flotation method, the problem of simultaneous recovery of coarse-grain zinc oxide and fine-grain zinc oxide in ore dressing is effectively solved, and zinc oxide minerals are efficiently recovered.

From example 1 and comparative examples 4-14, it is seen that the Zn content and recovery rate of the zinc oxide concentrate are significantly reduced when the collector defined in the present application is replaced or modified.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims

1. A method for beneficiation of zinc oxide ores, comprising:

Desliming the fine fraction product to obtain mineral mud and sand setting;

2. The method of beneficiation of zinc oxide ore according to claim 1, wherein the coarse fraction product has a particle size > 74 μm and the fine fraction product has a particle size of 74 μm or less.

3. The beneficiation method of zinc oxide ores according to claim 1, wherein the spiral chute roughing is used for obtaining spiral chute roughing concentrates, spiral chute roughing middlings and tailings 1;

4. A method of beneficiating zinc oxide ore according to claim 3, wherein the regrind has a terminal particle size of less than or equal to 74 μm at 80% to 95%.

5. The method for concentrating zinc oxide ore according to claim 1, wherein the horizontal gradient of the shaking table used in the shaking table concentration is less than or equal to 10 °.

6. The method of beneficiation of zinc oxide ores according to claim 1, wherein at least one of the following conditions is satisfied:

A. the desliming is carried out by adopting a cyclone;

B. the desliming is performed at least 2 times.

7. The beneficiation method of zinc oxide ores according to claim 1, wherein the modifier comprises sodium carbonate and sodium hexametaphosphate, and the mass ratio of the sodium carbonate to the sodium hexametaphosphate is (10-15): 1.

8. A method of beneficiating zinc oxide ores according to claim 1, wherein the activating agent comprises sodium sulfide.

9. The method of beneficiation of zinc oxide ores according to claim 1, wherein at least one of the following conditions is satisfied:

10. A method of beneficiation of zinc oxide ores according to any of claims 1 to 9, wherein at least one of the following conditions is satisfied:

A. The roughing is carried out at least 1 time;

B. the scavenging is performed at least 2 times;

C. The beneficiation is performed at least 3 times.