Fine-grained antimony oxide ore beneficiation method

Abstract

This application provides a method for beneficiating fine-grained antimony oxide ore, belonging to the field of ore separation technology. The method first obtains antimony oxide concentrate through a direct flotation process, then applies reverse flotation to the concentrate, using a first depressant and a first collector to achieve efficient recovery of fine-grained antimony oxide. The first depressant includes water glass, sodium carbonate, and sodium tricarboxylate starch; the first collector includes modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate, significantly enhancing the separation effect between antimony oxide and gangue minerals. The beneficiation method for fine-grained antimony oxide ore provided by this application effectively solves the problem of recovering and utilizing fine-grained antimony oxide containing mud, providing a new and effective method for the development and utilization of similar fine-grained antimony oxide resources, and is suitable for widespread application.

Description

Technical Field

[0001] This invention relates to the field of ore separation technology, specifically to a method for beneficiating fine-grained antimony oxide ore. Background Technology

[0002] Antimony is one of the world's most scarce mineral resources, but my country has relatively abundant antimony resources. As an important strategic mineral resource, antimony is widely used in the manufacture of lead-acid batteries, photovoltaic equipment, semiconductors, flame retardants, far-infrared devices, and military products.

[0003] Antimony oxide ore is a relatively difficult ore to beneficiate. Currently, gravity separation is still used for the beneficiation of antimony oxide ore both domestically and internationally, but the recovery rate of gravity separation for fine-grained antimony oxide ore is low.

[0004] Therefore, there is an urgent need to develop a beneficiation method for fine-grained antimony oxide ore to improve the comprehensive utilization rate of antimony oxide ore resources in my country. Summary of the Invention

[0005] In view of the technical problems existing in the background art, this application provides a beneficiation method for fine-grained antimony oxide ore, which aims to solve the problems of difficult beneficiation and low recovery rate of existing fine-grained antimony oxide ore.

[0006] This application provides a method for beneficiating fine-grained antimony oxide ore, including the following steps:

[0007] S1. Add water to the ore sample, stir and mix well to obtain the flotation raw ore slurry;

[0008] S2. The raw ore pulp is subjected to direct flotation using direct flotation reagents to obtain antimony oxide concentrate and direct flotation tailings.

[0009] S3. The antimony oxide concentrate is subjected to reverse flotation using reverse flotation reagents to obtain antimony concentrate and reverse flotation tailings II.

[0010] In the technical solution of this application embodiment, antimony oxide concentrate is first obtained through a positive flotation process, and then the antimony oxide concentrate is subjected to a reverse flotation process. With the help of positive flotation reagents and reverse flotation reagents, the efficient recovery of fine antimony oxide particles is achieved.

[0011] In some embodiments, the positive flotation reagent includes: a first inhibitor and a first collector; the first inhibitor includes: water glass, sodium carbonate, sodium tricarboxylate starch, with a mass ratio of 8-12:8-12:1-2; the first collector includes: modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, magnesium sulfate, with a mass ratio of 0.5-1.5:0.5-1.5:1-2.5:1-2.5.

[0012] In this embodiment, the first inhibitor and the first collector, obtained by compounding raw materials in a specific ratio, greatly enhance the separation effect of antimony oxide and gangue minerals in the positive flotation operation. The inhibitor can weaken the interaction between the collector and the mineral, thereby reducing the floatability of the mineral, while the collector can increase the hydrophobicity of the mineral surface, making it easier for it to adhere to the air bubbles, thereby improving the floatability of the mineral.

[0013] In some embodiments, the positive flotation reagent further includes a frother and a pH adjuster. The frother is one or more of terpineol, methyl isobutyl alcohol, and methoxypropylene glycol; the pH adjuster is NaOH.

[0014] In this embodiment, by adding a frother during the flotation process, the surface tension of water can be reduced to form foam, allowing air bubbles in the aerated flotation slurry to adhere to the selectively floating mineral particles, thereby further separating antimony from gangue minerals; by adjusting the pH value of the slurry to 6.5-8, the slurry environment is made into a neutral condition, which is conducive to the subsequent mineral processing.

[0015] In some embodiments, the reverse flotation reagent includes: a second inhibitor and a second collector. The second inhibitor is NaOH; the second collector includes: cocoamine, oleic acid, and neutral oil.

[0016] In this embodiment, by adding a second inhibitor and a second collector to the reverse flotation operation, the antimony oxide concentrate is further subjected to reverse flotation to further separate the antimony in the ore and the minerals in the gangue.

[0017] In some embodiments, positive flotation includes two roughing stages, two scavenging stages, and two cleaning stages. During the first roughing stage, the dosage of the first depressant is 500–7000 g / t, the dosage of the first collector is 100–1200 g / t, the dosage of the frother is 10–60 g / t, and the dosage of the pH adjuster is 50–2000 g / t. During the second roughing stage, the dosage of the first collector is 50–800 g / t. During the first cleaning stage, the dosage of the first depressant is 50–1000 g / t, and during the second cleaning stage, the dosage of the first depressant is 20–600 g / t. During the first scavenging stage, the dosage of the first collector is 30–600 g / t, and during the second scavenging stage, the dosage of the first collector is 10–400 g / t.

[0018] In this embodiment, by adding different amounts of positive flotation reagents in two roughing, two scavenging, and two cleaning operations, antimony in the ore and gangue minerals are fully separated, thereby achieving efficient separation of antimony in the ore and gangue minerals in the positive flotation operation.

[0019] In some embodiments, reverse flotation includes two reverse flotation operations. In the first reverse flotation operation, the dosage of the second depressant is 1000–5000 g / t, and the dosage of the second collector is 30–200 g / t; in the second reverse flotation operation, the dosage of the second depressant is 500–3000 g / t, and the dosage of the second collector is 10–150 g / t.

[0020] In this embodiment, by adding a second inhibitor and a second collector in two reverse flotation operations, the antimony in the antimony oxide concentrate is further separated from the gangue minerals.

[0021] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in this application will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0023] Figure 1 This is a flowchart of the fine-grained antimony oxide ore beneficiation method in Example 1 of this application;

[0024] Figure 2 This is a flowchart of the fine-grained antimony oxide ore beneficiation method in Comparative Example 9 of this application;

[0025] Figure 3 This is a flowchart of the fine-grained antimony oxide ore beneficiation method in Comparative Example 10 of this application;

[0026] Figure 4 This is a flowchart of the fine-grained antimony oxide ore beneficiation method in Comparative Example 11 of this application. Detailed Implementation

[0027] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0031] To address the difficulties and low recovery rates in the beneficiation of fine-grained antimony oxide ore, this application provides a beneficiation method for fine-grained antimony oxide ore. This method first employs a two-stage roughing, two-stage scavenging, and two-stage cleaning direct flotation process to obtain antimony oxide concentrate. Then, the concentrate undergoes two reverse flotation processes, combined with a first depressant and a first collector, achieving highly efficient recovery of fine-grained antimony oxide. The first depressant includes water glass, sodium carbonate, and sodium tricarboxylate starch; the first collector includes modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate, significantly enhancing the separation of antimony oxide from gangue minerals. This method effectively solves the problem of recovering and utilizing muddy fine-grained antimony oxide, providing a new and effective method for the development and utilization of similar fine-grained antimony oxide resources, and is suitable for widespread application.

[0032] This application provides a method for beneficiating fine-grained antimony oxide ore, including the following steps:

[0033] S1. Add water to the ore sample, stir and mix well to obtain the flotation raw ore slurry;

[0034] S2. The raw ore pulp is subjected to direct flotation using direct flotation reagents to obtain antimony oxide concentrate and direct flotation tailings.

[0035] S3. The antimony oxide concentrate is subjected to reverse flotation using reverse flotation reagents to obtain antimony concentrate and reverse flotation tailings II.

[0036] In the technical solution of this application embodiment, antimony oxide concentrate is first obtained through a direct flotation process, and then the antimony oxide concentrate is subjected to a reverse flotation process. By combining direct and reverse flotation reagents, efficient recovery of fine-grained antimony oxide is achieved. If a reverse flotation operation is used first, there are problems such as poor removal efficiency when using a weaker collector, and significant loss of antimony oxide when using a stronger collector, resulting in a very low recovery rate.

[0037] Furthermore, in some embodiments, the positive flotation reagent includes: a first inhibitor and a first collector; the first inhibitor includes: water glass, sodium carbonate, sodium tricarboxylate starch, with a mass ratio of 8-12:8-12:1-2; the first collector includes: modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, magnesium sulfate, with a mass ratio of 0.5-1.5:0.5-1.5:1-2.5:1-2.5.

[0038] In the technical solution of this application embodiment, the first inhibitor and the first collector, obtained by compounding raw materials in a specific ratio, greatly enhance the separation effect of antimony oxide and gangue minerals in positive flotation. The inhibitor weakens the interaction between the collector and the minerals, thereby reducing the floatability of the minerals. The collector increases the hydrophobicity of the mineral surface, making it easier for the minerals to adhere to air bubbles, thus improving the floatability of the minerals and greatly enhancing the separation effect of antimony oxide and gangue minerals. The addition of some inhibitors can lead to the inability to separate antimony oxide and gangue. Some existing collectors, used alone or in combination, have poor experimental results. This application uses a combination of three different types of collectors, and simultaneously adds magnesium sulfate to form a metal complex collector with the collector, which can enhance the separation of antimony oxide and gangue minerals.

[0039] Furthermore, in some embodiments, the positive flotation reagent further includes: a frother and a pH adjuster, wherein the frother is one or more of terpineol, methyl isobutyl alcohol, and methoxypropylene glycol; and the pH adjuster is NaOH.

[0040] In the technical solution of this application embodiment, by adding a frother during the flotation process, the surface tension of water can be reduced to form foam, so that the air bubbles in the aerated flotation pulp can adhere to the selectively floating mineral particles, thereby further separating antimony from gangue minerals; by adjusting the pH value of the pulp to 6.5-8, the pulp environment is made into a neutral condition, which is conducive to the subsequent mineral processing.

[0041] Furthermore, in some embodiments, the reverse flotation reagent includes: a second inhibitor and a second collector. The second inhibitor is NaOH; the second collector includes: cocoamine, oleic acid, and neutral oil. Even further, the preferred mass ratio of cocoamine, oleic acid, and neutral oil in the second collector is 0.5–1.5: 2–4: 0.5–1.5.

[0042] In the technical solution of this application embodiment, by adding a second inhibitor and a second collector to the reverse flotation operation, the antimony oxide concentrate is further subjected to reverse flotation to further separate the antimony in the ore and the minerals in the gangue.

[0043] Furthermore, in some embodiments, positive flotation includes two roughing stages, two sweeping stages, and two cleaning stages, with the specific steps as follows:

[0044] 1. Add water to the ore sample, stir and mix well to obtain the flotation raw ore slurry;

[0045] 2. The raw ore slurry is subjected to a first roughing operation. 500-7000 g / t of the first inhibitor is added to the raw ore slurry, and the mixture is stirred thoroughly. Then, 50-2000 g / t of pH adjuster is added, followed by 100-1200 g / t of the first collector, and the mixture is stirred thoroughly. Then, 10-60 g / t of frother is added, and the mixture is stirred thoroughly. Aeration flotation is performed to obtain rough concentrate one and tailings one. Tailings one enters a second roughing operation. 50-800 g / t of the first collector is added, and the mixture is stirred thoroughly. Aeration flotation is performed to obtain rough concentrate two and tailings two.

[0046] 3. After the first rough concentrate and the second rough concentrate are mixed evenly, they are put into the first cleaning operation. 50-1000 g / t of the first depressant is added, and the mixture is stirred thoroughly and then aerated for flotation to obtain concentrate one and middlings one. Concentrate one is put into the second cleaning operation. 20-600 g / t of the first depressant is added, and the mixture is stirred thoroughly and then aerated for flotation to obtain concentrate two and middlings two. During the closed-loop flotation cycle, middlings one is returned to the second roughing operation, and middlings two is returned to the first cleaning operation in sequence.

[0047] 4. The tailings 2 are fed into the first scavenging operation, 30-600 g / t of the first collector is added, the mixture is stirred thoroughly, and aerated flotation is performed to obtain scavenging concentrate 1 and tailings 3. Tailings 3 are fed into the second scavenging operation, 10-400 g / t of the first collector is added, the mixture is stirred thoroughly, and aerated flotation is performed to obtain scavenging concentrate 2 and tailings 4 (i.e., positive flotation tailings 1). During the closed-loop flotation cycle, scavenging concentrate 1 is returned to the second roughing operation, while scavenging concentrate 2 is returned to the first scavenging operation in sequence.

[0048] In the technical solution of this application embodiment, by adding different amounts of positive flotation reagents in two roughing, two scavenging, and two cleaning operations, the antimony in the ore and the minerals in the gangue are fully separated, thereby achieving efficient separation of antimony in the ore and gangue minerals in the positive flotation operation.

[0049] Furthermore, in some embodiments, in step 1, the ore sample is gravity separation tailings from a mineral processing plant, and the content of minerals with a particle size of less than 20 μm in the ore sample is 24-28%; the slurry concentration is 26-30%.

[0050] In the technical solution of this application embodiment, the ore is fine-grained antimony oxide ore.

[0051] During the first reverse flotation operation, the dosage of the second depressant is 1000-5000 g / t, and the dosage of the second collector is 30-200 g / t; during the second reverse flotation operation, the dosage of the second depressant is 500-3000 g / t, and the dosage of the second collector is 10-150 g / t.

[0052] Furthermore, in some embodiments, reverse flotation includes two reverse flotation operations, with the specific steps as follows:

[0053] Concentrate 2 is fed into the first reverse flotation operation, with 1000-5000 g / t of the second depressant added, followed by 30-200 g / t of the second collector. After thorough stirring and aeration flotation, antimony concentrate and middlings 3 are obtained. Middlings 3 is then fed into the second reverse flotation operation, with 500-3000 g / t of the second depressant added, followed by 30-200 g / t of the second collector. After thorough stirring and aeration flotation, middlings 4 and tailings 5 ​​(i.e., reverse flotation tailings 2) are obtained. During the closed-circuit flotation test, middlings 4 is returned to the first reverse flotation operation in sequence.

[0054] In the technical solution of this application embodiment, a second inhibitor and a second collector are added in two reverse flotation operations respectively to further separate antimony from gangue minerals in antimony oxide concentrate.

[0055] The following are some specific embodiments. It should be noted that the embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0056] Example 1

[0057] This embodiment provides a method for beneficiating fine-grained antimony oxide ore, and the beneficiation flow chart is shown below. Figure 1 As shown, the specific steps include the following:

[0058] (1) Weigh 500g of ore sample, add water to make the slurry concentration 28%, stir and mix well to obtain flotation raw ore slurry;

[0059] (2) Direct flotation process: Add 2000 g / t of the first inhibitor (i.e., inhibitor DP-1) to the slurry, stir thoroughly for 3 min, add 500 g / t of NaOH to adjust the pH of the slurry to 7.5, then add 600 g / t of the first collector (i.e. collector CK-1), stir thoroughly for 3 min, add 20 g / t of pine oil, stir for 1 min, and aerate for 3 min to obtain rough concentrate one and tailings one; the tailings enter the second roughing operation, add 400 g / t of the first collector (i.e. collector CK-1), stir thoroughly for 3 min, and aerate for 2 min to obtain rough concentrate two and tailings two;

[0060] After thoroughly mixing rough concentrate one and rough concentrate two, the mixture enters the first cleaning operation. 100 g / t of the first depressant (i.e., depressant DP-1) is added, and the mixture is stirred thoroughly for 3 minutes, followed by aeration and flotation for 2 minutes to obtain concentrate one and middlings one. Concentrate one then enters the second cleaning operation, where 60 g / t of the first depressant (i.e., depressant DP-1) is added, and the mixture is stirred thoroughly for 3 minutes, followed by aeration and flotation for 2 minutes to obtain concentrate two and middlings two. During the closed-loop flotation cycle, middlings one is returned to the second roughing operation, while middlings two are returned sequentially to the first cleaning operation.

[0061] Tailings 2 enters the first scavenging operation, where 200 g / t of the first collector (collector CK-1) is added, stirred thoroughly for 3 minutes, and then aerated for 2 minutes to obtain scavenged concentrate 1 and tailings 3. Tailings 3 enters the second scavenging operation, where 100 g / t of the first collector (collector CK-1) is added, stirred thoroughly for 3 minutes, and then aerated for 2 minutes to obtain scavenged concentrate 2 and tailings 4. During closed-loop flotation, scavenged concentrate 1 is returned to the second roughing operation, while scavenged concentrate 2 is returned sequentially to the first scavenging operation.

[0062] (3) Reverse flotation process: The concentrate 2 obtained from the direct flotation process enters the first reverse flotation operation. First, 1500 g / t of NaOH is added, followed by 120 g / t of the second collector (i.e., collector CK-2). The mixture is stirred thoroughly for 3 minutes, followed by aeration and flotation for 2 minutes to obtain antimony concentrate and middlings 3. Middlings 3 enters the second reverse flotation operation. First, 500 g / t of NaOH is added, followed by 80 g / t of the second collector (i.e., collector CK-2). The mixture is stirred thoroughly for 3 minutes, followed by aeration and flotation for 2 minutes to obtain middlings 4 and tailings 5. During the closed-circuit flotation test, middlings 4 is returned to the first reverse flotation operation in sequence.

[0063] The source and performance parameters of the mineral sample are as follows: It is a gravity separation tailings from a mineral processing plant, in which minerals with a particle size of less than 20μm account for about 26%. The antimony content in the raw ore is 0.98%, and the main gangue minerals are quartz, kaolinite, calcite, mica, feldspar, etc.

[0064] The raw material ratios of the first collector (collector CK-1), the first inhibitor (inhibitor DP-1), and the second collector (collector CK-2) are as follows: The first collector (collector CK-1) is composed of modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate in a mass ratio of 1:1:2:2; the first inhibitor (inhibitor DP-1) is composed of water glass, sodium carbonate, sodium tricarboxylate, and starch in a mass ratio of 10:10:1; and the second collector (collector CK-2) is composed of modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate in a mass ratio of 1:1:2:2.

[0065] The test results of the antimony oxide ore separation index in this embodiment are shown in Table 1.

[0066] Table 1. Separation Indicators of Antimony Oxide Ore in Example 1

[0067]

[0068] Examples 2-5 and Comparative Examples 1-4

[0069] Examples 2-5 and Comparative Examples 1-4 each provide a method for beneficiating fine-grained antimony oxide ore. The difference from Example 1 is that the proportions of raw materials in the first inhibitor (i.e., inhibitor DP-1) and the first collector (i.e. collector CK-1) are different. The other steps are roughly the same as in Example 1 and will not be repeated here. The raw material ratio is shown in Table 2.

[0070] Table 2 shows the raw material ratios of the first inhibitor (i.e., inhibitor DP-1) and the first collector (i.e., collector CK-1) in Examples 2-5 and Comparative Examples 1-4.

[0071]

[0072]

[0073] The test results of the separation index of antimony oxide ore in Examples 2-5 and Comparative Examples 1-4 are shown in Table 3.

[0074] Table 3. Separation indices of antimony oxide ore in Examples 2-5 and Comparative Examples 1-4.

[0075]

[0076]

[0077] As can be seen from the test results of Examples 2-5 in Table 3, the combined separation process of antimony oxide ore gravity flotation of the present invention, wherein the mass ratio of water glass, sodium carbonate, sodium tricarboxylate starch in the first inhibitor is 8-12:8-12:1-2, and the mass ratio of modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate in the first collector is 0.5-1.5:0.5-1.5:1-2.5:1-2.5, can effectively separate antimony oxide from gangue minerals, obtain better process indicators, and has good prospects for industrial application. As can be seen from the test results of Comparative Examples 1-4, it is difficult to achieve efficient separation of antimony oxide from gangue minerals using reagent mixing ratios other than those of the present invention.

[0078] The synergistic effect of the raw materials in the first inhibitor is as follows: water glass and sodium carbonate can react with the surface of gangue minerals in the slurry through physical and chemical reactions, changing the surface electrical properties of fine particles and dispersing the slurry through electrostatic repulsion. At the same time, sodium carbonate can eliminate the influence of unavoidable ions such as calcium and aluminum in the slurry on flotation. The hydroxyl groups of sodium tricarboxylate starch can bond with the surface of fine gangue minerals, agglomerating the same type of fine gangue minerals into large particle clusters. The three reagents purify the flotation environment by agglomerating fine gangue and dispersing the slurry. The synergistic effect principle among the raw materials in the first collector is as follows: magnesium ions react with the collector to form a metal complex collector. Due to the difference in active sites on the mineral surface, different collectors in the combined collector can be "interleaved" and adsorbed on different active sites, ensuring a strong interaction between the agent and the mineral. At the same time, due to the difference in the surface charge of the mineral or the charge of the agent, the combined collector can enhance the electrostatic attraction between the agent and the mineral to a certain extent or weaken the electrostatic repulsion between the agent and the mineral. Therefore, this combined collector can enhance the collection ability of antimony oxide through co-adsorption, chelation with ions on the mineral surface, and other mechanisms.

[0079] Comparative Examples 5-6

[0080] This comparative example provides a method for beneficiating fine-grained antimony oxide ore. The difference between this method and Example 1 is that the raw material for the first inhibitor (i.e., inhibitor DP-1) is different. In Comparative Example 5, the first inhibitor (i.e., inhibitor DP-1) is water glass, while in Comparative Example 6, the first inhibitor (i.e., inhibitor DP-1) is a mixture of water glass and starch in a mass ratio of 9:2. The other steps are roughly the same as in Example 1 and will not be repeated here.

[0081] Comparative Examples 7-8

[0082] This comparative example provides a method for beneficiating fine-grained antimony oxide ore. The difference between this method and Example 1 is that the raw materials for the first collector (i.e., collector CK-1) are different. In Comparative Example 7, the first collector (i.e., collector CK-1) is sodium dodecyl sulfate, while in Comparative Example 8, the first collector (i.e., collector CK-1) is a mixture of oleic acid, salicylic acid, and sodium petroleum sulfonate in a mass ratio of 9:1:1. The other steps are roughly the same as in Example 1 and will not be described again here.

[0083] The test results of the separation index of antimony oxide ore in Comparative Examples 5–8 are shown in Table 4.

[0084] Table 4 shows the separation indicators of antimony oxide ore in Comparative Examples 5–8.

[0085]

[0086]

[0087] As can be seen from the test results of Comparative Examples 5-6 in Table 4, compared with Example 1, when the first inhibitor is water glass or water glass and starch, the grade and recovery rate of Sb are reduced. As can be seen from the test results of Comparative Examples 7-8, compared with Example 1, when the first collector is sodium dodecyl sulfate or carboxyl, oxime, or sulfonic acid groups, the grade and recovery rate of Sb are significantly reduced, and the recovery effect is poor.

[0088] Comparative Example 9

[0089] This comparative example provides a method for beneficiating fine-grained antimony oxide ore. The difference from Example 1 is that reverse flotation is not performed; the other steps are largely the same as in Example 1 and will not be repeated here. The beneficiation process flow is as follows: Figure 2 As shown.

[0090] Comparative Example 10

[0091] This comparative example provides a method for beneficiating fine-grained antimony oxide ore. The difference from Example 1 is that a second reverse flotation operation is omitted. Other steps are largely the same as in Example 1 and will not be repeated here. The beneficiation process flow is as follows: Figure 3 As shown.

[0092] Comparative Example 11

[0093] This comparative example provides a method for beneficiating fine-grained antimony oxide ore. Compared to Example 1, the difference lies in the elimination of the reverse flotation operation and the addition of a third cleaning operation during the forward flotation process. Specifically, the second-grade concentrate enters the third cleaning operation without any reagents. After thorough stirring for 1 minute, it is aerated and floated for 2 minutes to obtain a third-grade concentrate and tailings. The tailings are returned sequentially and combined with the first-grade concentrate before entering the third cleaning operation. Other steps are largely the same as in Example 1 and will not be repeated here. The beneficiation process flow is as follows: Figure 4 As shown.

[0094] Comparative Example 12

[0095] This comparative example provides a method for beneficiating fine-grained antimony oxide ore. The difference from Example 1 is that reverse flotation is performed first, followed by forward flotation. The other steps are roughly the same as in Example 1 and will not be described again here.

[0096] The test results of the separation index of antimony oxide ore in Comparative Examples 9–12 are shown in Table 5.

[0097] Table 5. Separation Indicators of Antimony Oxide Ore in Comparative Examples 9–12

[0098]

[0099]

[0100] As can be seen from Table 5, compared with Example 1, regardless of whether the reverse flotation is cancelled and the concentrate operation is increased, the reverse flotation operation is reduced, or the order of the positive flotation industry and the reverse flotation process is changed, the grade and recovery rate of Sb are reduced and the recovery effect is decreased.

[0101] In summary, this application provides a method for beneficiating fine-grained antimony oxide ore. First, a two-stage roughing, two-stage scavenging, and two-stage cleaning direct flotation process is used to obtain antimony oxide concentrate. Then, the concentrate undergoes two reverse flotation processes, combined with a first depressant and a first collector, achieving efficient recovery of fine-grained antimony oxide. The first depressant and first collector are a novel combination of reagents. The first depressant includes water glass, sodium carbonate, and sodium tricarboxylate starch; the first collector includes modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate, significantly enhancing the separation of antimony oxide from gangue minerals. The fine-grained antimony oxide ore beneficiation method provided by this application effectively solves the problem of recovering and utilizing fine-grained antimony oxide containing mud, providing a new and effective method for the development and utilization of similar fine-grained antimony oxide resources, and is suitable for widespread application.

[0102] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A method for beneficiating fine-grained antimony oxide ore, characterized in that, Includes the following steps: S1. Add water to the ore sample, stir and mix well to obtain the flotation raw ore slurry; S2. The raw ore pulp is subjected to direct flotation using direct flotation reagents to obtain antimony oxide concentrate and direct flotation tailings. S3. The antimony oxide concentrate is subjected to reverse flotation using reverse flotation reagents to obtain antimony concentrate and reverse flotation tailings II; The positive flotation reagents include: a first inhibitor and a first collector; the first inhibitor includes: water glass, sodium carbonate, sodium tricarboxylate starch, and the first collector includes: modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate.

2. The method for beneficiating fine-grained antimony oxide ore according to claim 1, characterized in that, The mass ratio of water glass, sodium carbonate, sodium tricarboxylate, and starch in the first inhibitor is 8~12:8~12:1~2; the mass ratio of modified oleic acid, alkyl hydroxamic acid, sodium tetradecyl sulfonate, and magnesium sulfate in the first collector is 0.5~1.5:0.5~1.5:1~2.5:1~2.

5.

3. The method for beneficiating fine-grained antimony oxide ore according to claim 1, characterized in that, The positive flotation reagent also includes: a frother and a pH adjuster, wherein the frother is one or more of terpineol, methyl isobutyl alcohol, and methoxypropylene glycol; and the pH adjuster is NaOH.

4. The method for beneficiating fine-grained antimony oxide ore according to claim 1, characterized in that, The anti-flotation reagent includes: a second inhibitor and a second collector.

5. The method for beneficiating fine-grained antimony oxide ore according to claim 4, characterized in that, The second inhibitor is NaOH; the second collector includes: cocoamine, oleic acid, and neutral oil.

6. The method for beneficiating fine-grained antimony oxide ore according to claim 3, characterized in that, The positive flotation process includes two roughing stages, two sweeping stages, and two cleaning stages.

7. The method for beneficiating fine-grained antimony oxide ore according to claim 6, characterized in that, In the positive flotation process, during the first roughing operation, the dosage of the first inhibitor is 500-7000 g / t, the dosage of the first collector is 100-1200 g / t, the dosage of the frother is 10-60 g / t, and the dosage of the pH adjuster is 50-2000 g / t; during the second roughing operation, the dosage of the first collector is 50-800 g / t; during the first cleaning operation, the dosage of the first inhibitor is 50-1000 g / t, and during the second cleaning operation, the dosage of the first inhibitor is 20-600 g / t; during the first scavenging operation, the dosage of the first collector is 30-600 g / t, and during the second scavenging operation, the dosage of the first collector is 10-400 g / t.

8. The method for beneficiating fine-grained antimony oxide ore according to claim 4, characterized in that, The reverse flotation includes two reverse flotation operations.

9. The method for beneficiating fine-grained antimony oxide ore according to claim 8, characterized in that, In the reverse flotation process, during the first reverse flotation operation, the dosage of the second inhibitor is 1000~5000 g / t, and the dosage of the second collector is 30~200 g / t; during the second reverse flotation operation, the dosage of the second inhibitor is 500~3000 g / t, and the dosage of the second collector is 10~150 g / t.

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