Sb recovery and separation of arsenic and antimony based on secondary resource recovery

Abstract

The present application relates to non-ferrous metal dressing technical field, specifically, it relates to antimony ore arsenic antimony separation and antimony recovery process based on secondary resource recovery, including the following steps: high arsenic pyrite concentrate is carried out grinding treatment; then the ground ore pulp is sent to the reverse flotation system, first, sodium carbonate is added to the ore pulp to adjust pH, then active carbon, sodium sulfide are added and stirred to mix, followed by adding xanthate, 2# oil, reverse flotation is carried out, antimony rough concentrate and arsenic removal sulfur concentrate are obtained; finally, the antimony rough concentrate is concentrated and sent to the positive flotation system, sulfuric acid is added to the ore pulp to adjust pH, then active carbon, lead nitrate, ammonium butyl dithiophosphate are added and stirred to mix, positive flotation is carried out, high-grade antimony concentrate is obtained, arsenic antimony separation and antimony recovery are completed through the sectional process design of secondary grinding, arsenic removal by reverse flotation and enrichment by positive flotation, combined with accurate reagent system and parameter control, the deep separation of arsenic and antimony in high arsenic pyrite concentrate and the efficient secondary recovery of antimony metal are realized.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal beneficiation technology, and more specifically, to a process for separating arsenic and antimony and recovering antimony from antimony ore based on secondary resource recovery. Background Technology

[0002] In antimony ore beneficiation, stibnite, stibnite, and arsenopyrite have highly similar physicochemical properties and are closely associated. In their natural state, the floatability curves of stibnite and arsenopyrite almost overlap in different media, lacking a natural separation window. Commonly used activators activate both, further complicating separation. Arsenopyrite often exists as finely embedded particles, forming encapsulated and interpenetrating structures with antimony minerals, making complete dissociation difficult even after fine grinding. Furthermore, its surface electrical and chemical activities are similar, resulting in poor selectivity with conventional collectors. Stibnite, being a complex sulfide mineral with a more complex composition and poor dissociation characteristics, is even more difficult to separate from arsenopyrite than stibnite.

[0003] In actual production, after a first stage of flotation, the antimony recovery rate of low-grade and difficult-to-process antimony ore (such as Chashan ore) is only 38.96% (weighted average). A large amount of antimony resources (nearly 50%) do not enter the lead-antimony concentrate, but are enriched in the pyrite concentrate, forming a high-arsenic pyrite concentrate containing 4%-6% antimony, 20% arsenic, 30% iron, and 30% sulfur.

[0004] In the existing process, the water used in the concentrator is highly alkaline (pH=12) due to the large amount of lime used in the zinc flotation stage, which conflicts with the weakly acidic conditions required for the optimal flotation of antimony ore, severely inhibiting antimony recovery. Furthermore, the grinding particle size of the raw ore is relatively coarse (-200 mesh accounts for only 45%), and the antimony ore is not fully liberated from pyrite and arsenopyrite. At the same time, the reagent system is unreasonable. The sodium sulfite + zinc sulfate heptahydrate inhibitor used in the lead-antimony co-flotation has a very strong inhibitory effect on stibnite, causing it to enter the pyrite concentrate in large quantities. In addition, the raw ore has not undergone waste disposal treatment, and a large amount of quartz gangue affects the flotation effect.

[0005] For the separation of arsenic and antimony from high-arsenic pyrite concentrate, existing technologies mostly employ oxidative reverse flotation or conventional direct flotation. However, oxidative reverse flotation uses oxidants such as potassium permanganate and potassium dichromate, which cannot effectively separate arsenic and antimony. The tailings still contain about 3% antimony, resulting in poor product quality. Conventional direct flotation uses sodium humate to suppress arsenic, but the suppression effect is poor under high arsenic conditions (>20%). The antimony concentrate produced contains >10% arsenic, and the antimony grade is only 6-8%, which is difficult to meet smelting requirements. Summary of the Invention

[0006] This invention provides a process for separating and recovering antimony from antimony ore based on secondary resource recovery. Through a segmented process design of secondary grinding, reverse flotation for arsenic removal, and forward flotation for enrichment, coupled with precise reagent system and parameter control, it achieves deep separation of arsenic and antimony and efficient secondary recovery of antimony metal in high-arsenic pyrite concentrate. This solves the problems of low antimony recovery rate, high difficulty in arsenic and antimony separation, and waste of secondary resources in low-grade and difficult-to-process antimony ore mentioned in the background technology.

[0007] To achieve the above objectives, the antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore includes:

[0008] S1. The production water used in the process is pretreated by the wastewater treatment system to adjust the pH to 5-6 and reduce the COD of the water to obtain process water that meets the flotation requirements.

[0009] S2. Grind the high arsenic-sulfur iron concentrate to control the proportion of -200 mesh particles to 85%-95% to obtain a fully liberated grinding slurry.

[0010] S3. The grinding slurry is fed into the reverse flotation system. The pH is adjusted to 9-10 with sodium carbonate, activated carbon and sodium sulfide are added and stirred. Then xanthate and No. 2 oil are added. The reverse flotation process of 1 roughing, 3 cleaning and 4 scavenging is used to obtain antimony rough concentrate and arsenic-removed sulfur concentrate. The reverse flotation system is equipped with two stirring tanks to complete the pH adjustment and reagent mixing respectively. The amount of sodium sulfide in the three cleaning processes decreases in turn. Xanthate and No. 2 oil are added in the scavenging process.

[0011] S4. After the antimony rough concentrate is concentrated by an 8-meter thickener, it is sent to the positive flotation system. The pH is adjusted to 6-7 with sulfuric acid, and activated carbon, lead nitrate, and butyl ammonium black reagent are added and stirred. Positive flotation is carried out using a 1 rougher and 3 cleaner flotation process (without adding any inhibitors) to obtain high-grade antimony concentrate.

[0012] S5. When the required antimony content of the recovered product is ≥2%, the positive flotation enrichment process is omitted, and the antimony crude concentrate is used directly as the product. When the antimony content of the high arsenic pyrite concentrate is less than 1%, a trace amount of copper sulfate is added to the reverse flotation scavenging process to enhance arsenic removal.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] Through a segmented process of secondary grinding, reverse flotation for arsenic removal, and forward flotation for enrichment, along with a proprietary reagent system, precise separation of arsenic and antimony and efficient recovery of antimony metal are achieved, producing high-grade antimony concentrate. The process can be flexibly adjusted according to the quality of raw materials and product requirements to adapt to different working conditions. At the same time, the equipment modification is simple, and the reagent dosage is precisely controllable. It takes into account the comprehensive utilization of resources, environmental benefits, and production costs, and has extremely strong industrial promotion value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the process flow of the present invention. Detailed Implementation

[0016] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0017] Due to the extreme difficulty in separating stibnite, stibnite and arsenopyrite in existing antimony ore beneficiation processes, the antimony recovery rate of low-grade and difficult-to-beneficiate antimony ore is extremely low. A large amount of antimony metal is enriched in high-arsenic pyrite concentrate, resulting in resource waste. Furthermore, traditional processes cannot balance the separation effect of arsenic and antimony with product quality, making it difficult to meet the needs of industrial production for comprehensive resource utilization.

[0018] Therefore, this invention presents a process for separating arsenic and antimony and recovering antimony from antimony ore based on secondary resource replenishment:

[0019] Example 1, Reference Figure 1 As shown, the specific implementation process of the present invention is as follows:

[0020] Step 1: All production water used in the process must first undergo standardized pretreatment through a wastewater treatment system.

[0021] During pretreatment, the pH of the production water is precisely adjusted to 5-6 by adding an acidic regulator. Simultaneously, filtration and adsorption processes are used to reduce the COD content in the water, ensuring the process water is free of impurities. The pretreated process water will be stored and used for pulp preparation, reagent dilution, and addition in all subsequent processes, including secondary grinding, reverse flotation for arsenic removal, and direct flotation enrichment.

[0022] The second step involves selecting an intermediate product generated during the beneficiation of low-grade, difficult-to-process antimony ore, namely, high-arsenic pyrite concentrate (containing 4%-6% antimony, 20% arsenic, 30% iron, and 30% sulfur), as raw material. This raw material is the main carrier of antimony metal loss in traditional processes. In this embodiment, a 1.2×2.4 grid ball mill is used to perform secondary grinding treatment on the high-arsenic pyrite concentrate. By optimizing the grinding time and the ratio of grinding media, the grinding particle size is strictly controlled to be 85%-95% (preferably 90%) of -200 mesh.

[0023] This step is used to break the close intergrowth relationship between antimony ore (stibnite, stibnite) and arsenopyrite and pyrite, and solve the problem of unliberated minerals caused by the coarse grinding particle size in traditional processes (only 45% at -200 mesh). This fully exposes the antimony ore particles, providing the necessary prerequisite for the subsequent precise separation of arsenic and antimony. After grinding, a fully liberated grinding slurry is obtained and directly transported to the reverse flotation system.

[0024] The third step, reverse flotation of the grinding slurry to remove arsenic, is the core process for achieving arsenic-antimony separation in this invention. It employs an enhanced flotation process of "1 roughing, 3 cleaning, 4 scavenging," with two independent mixing tanks for slurry pretreatment to ensure thorough mixing and reaction between the reagents and the slurry. The specific operation is as follows:

[0025] The grinding slurry obtained in step two is fed uniformly into the first mixing tank of the reverse flotation system. Sodium carbonate is added to the slurry as a pH adjuster to precisely adjust the pH value to 9-10. This pH range maximizes the inhibitory effect of sodium sulfide on antimony ore without affecting the floatability of arsenopyrite. Subsequently, 3-5 kg / t of activated carbon (preferably 4 kg / t) and 800-1200 g / t of sodium sulfide (preferably 1000 g / t) of high-arsenic pyrite concentrate are added to the first mixing tank. The activated carbon effectively adsorbs impurities in the slurry and reagents that may remain in subsequent processes, avoiding interference with the flotation effect. Sodium sulfide, as the core depressant, has a very strong selective inhibitory effect on antimony ore, far exceeding its inhibitory effect on arsenopyrite and pyrite, and can precisely prevent antimony ore from floating with the foam. Then, the mixing tank is started, and the stirring speed and time are controlled to ensure that the slurry, pH adjuster, activated carbon, and sodium sulfide are fully mixed and reacted to form a uniform and stable pretreated slurry.

[0026] The pretreated slurry after being processed in the first mixing tank is then sent to the second mixing tank. Xanthate (collector) and No. 2 oil (foaming agent) are added to the slurry. The mixing tank is started again to mix thoroughly, so that the collector is evenly adsorbed on the surface of arsenopyrite and pyrite, enhancing their hydrophobicity and preparing for subsequent flotation separation. After mixing, flotation slurry is obtained.

[0027] Then, the flotation slurry output from the second mixing tank is sent to the reverse flotation roughing cell, and the flotation time is controlled at 5 minutes. During the flotation process, arsenopyrite and pyrite adsorbed by xanthate adhere to the surface of the froth and float to the surface, while antimony ore inhibited by sodium sulfide remains in the slurry, thus achieving the initial separation of arsenic and antimony. After roughing, roughing froth (rich in arsenic) and roughing slurry (rich in antimony) are obtained.

[0028] The roughing froth is then sequentially fed into three reverse flotation cleaning cells for deep arsenic removal and purification. In these three cleaning processes, the amount of sodium sulfide added, sequentially from 500 g / t to 300 g / t to 100 g / t of high-arsenic pyrite concentrate, ensures both the inhibition of residual antimony ore and avoids the damage to the flotation environment caused by excessive reagents. After three cleaning processes, an arsenic-removed sulfide concentrate is obtained (containing approximately 27% arsenic; based on the high-arsenic pyrite concentrate, the yield of the arsenic-removed sulfide concentrate is 75%-78%). This arsenic-removed sulfide concentrate has a high arsenic content and extremely low antimony content (0.27%-0.3%), and is directly discharged into the tailings for disposal, achieving highly efficient arsenic removal.

[0029] The roughing slurry is then fed into a four-stage reverse flotation scavenging tank. During the scavenging process, xanthate and No. 2 oil are continuously added to ensure the full capture of residual arsenopyrite and pyrite, minimizing the arsenic content in the antimony concentrate. After scavenging, the resulting tailings are the antimony concentrate (containing approximately 10% antimony and 10% arsenic). This concentrate represents the initial removal of arsenic, laying the foundation for subsequent positive flotation enrichment.

[0030] Finally, when the antimony content of the high-arsenic pyrite concentrate is below 1%, a trace amount of copper sulfate is added to the slurry during the four reverse flotation scavenging processes mentioned above. The amount of copper sulfate added is strictly limited to avoid reactivating the antimony ore (excessive addition will cause the antimony ore to be activated and float, reducing the recovery rate). Through the selective activation effect of copper sulfate on arsenopyrite, the arsenic removal effect is further enhanced, reducing the arsenic content of the antimony concentrate from 3.55% to below 2.28%, ensuring that the quality of subsequent products meets the standards. This design demonstrates the adaptability of this invention to low-grade raw materials.

[0031] Step 4: Positive flotation enrichment of antimony rough concentrate further enriches the antimony in the antimony rough concentrate, improving the product grade. A "1 rougher, 3 cleaner" flotation process is used, and no depressants are added during the flotation process to avoid the strong inhibitory effect of traditional depressants on stibnite. The specific operation is as follows:

[0032] In this embodiment, the antimony crude concentrate obtained in step 3 is first fed into an 8-meter thickener for concentration treatment. Excess water is removed by gravity sedimentation to obtain antimony crude concentrate slurry with appropriate concentration. Concentration treatment can improve the efficiency of subsequent flotation and avoid reagent waste and reduced separation effect caused by excessively low slurry concentration.

[0033] The concentrated antimony rough concentrate slurry is then fed into the stirred tank of the positive flotation system. Sulfuric acid is added as a pH adjuster to precisely adjust the pH value to 6-7. This pH range is the optimal flotation condition for antimony ore, maximizing the collection effect of butylammonium black on antimony ore. Subsequently, 2 kg / t activated carbon, 1000 g / t lead nitrate, and butylammonium black (collector) are added to the stirred tank. The activated carbon is used to adsorb residual xanthate and other reagents from the reverse flotation process, avoiding cross-contamination. Lead nitrate, as an activator for antimony ore, enhances the hydrophobicity of the antimony ore surface, improving the collection efficiency of butylammonium black. butylammonium black has a highly selective collection effect on antimony ore, adsorbing only on the surface of the antimony ore and not reacting with residual arsenic minerals. The stirred tank is started to ensure that all reagents and slurry are fully mixed and reacted to form the flotation slurry.

[0034] Finally, the stirred flotation slurry is fed into a direct flotation roughing cell for initial enrichment of antimony ore. After roughing, roughed antimony ore froth and roughing tailings (containing extremely low antimony content, discharged into the total tailings) are obtained. The roughed antimony ore froth is then sequentially fed into three direct flotation cleaning cells for deep purification. Through multiple cleaning processes, residual gangue and trace amounts of arsenic minerals are removed, ultimately yielding a high-grade antimony concentrate (containing 22%-28% antimony and 5%-8% arsenic). This process, through a depressant-free design, successfully solves the problem of strong inhibition of stibnite by sodium sulfite in traditional processes, increasing the stibnite recovery rate from approximately 40% to over 90%, significantly improving the overall antimony recovery rate.

[0035] Step 5: Based on the different quality requirements of the smelting end, this invention designs a flexible and adjustable process scheme to adapt to different application scenarios: When the recovered product only requires an antimony content of ≥2% (such as some low-end smelting needs or scenarios with strict cost control), the positive flotation enrichment operation in Step 4 can be directly omitted, and the antimony rough concentrate obtained in Step 3 (containing 9%-12% antimony and 3.55%-4.42% arsenic) can be used as the final recovered product to complete the antimony recovery operation of high arsenic pyrite concentrate.

[0036] This adjustment scheme can save on equipment energy consumption, reagent consumption and labor costs in the positive flotation process, significantly improve production efficiency, and at the same time ensure that the product meets the basic smelting requirements, thus achieving a balance between benefits and costs. When the smelting end requires higher grade antimony concentrate (such as in the fields of high-end alloy production and fine chemicals), a complete reverse flotation arsenic removal and positive flotation enrichment process is adopted to produce high-grade antimony concentrate to meet the needs of the high-end market.

[0037] The process parameters for Example 1 are shown in Table 1:

[0038] Material Name Antimony grade Arsenic grade Antimony recovery rate Arsenic removal rate High-arsenic pyrite concentrate (raw material) 4.0% 21.0% - - Antimony crude concentrate 10.2% 9.8% 93.1% 53.3% High-grade antimony concentrate 28.1% 5.4% 74.6% 90.5% Arsenic-removed sulfur concentrate 0.27% 26.8% - -

[0039] Table 1

[0040] Example 2 follows the same process steps as Example 1, except that the amount of sodium sulfide added in the reverse flotation roughing process is changed.

[0041] Specifically, the amount of sodium sulfide used in the reverse flotation roughing stage was increased from 1000 g / t to 1200 g / t, while the remaining process parameters (including the amount of sodium sulfide used in the cleaning stage, pH value, flotation time, and the amount of other reagents) remained the same as in Example 1.

[0042] Example 2, the process parameters are shown in Table 2:

[0043] Material Name Antimony grade Arsenic grade Antimony recovery rate Arsenic removal rate High-arsenic pyrite concentrate (raw material) 4.0% 21.0% - - Antimony crude concentrate 11.5% 8.3% 90.7% 60.2% High-grade antimony concentrate 30.4% 4.8% 71.2% 92.3% Arsenic-removed sulfur concentrate 0.22% 27.1% - -

[0044] Table 2

[0045] By increasing the sodium sulfide dosage in the reverse flotation roughing stage from 1000 g / t to 1200 g / t, Table 2 data shows that the antimony grade in the antimony concentrate increased from 10.2% to 11.5%, and the arsenic grade decreased from 9.8% to 8.3%. In the high-grade antimony concentrate, the antimony grade increased from 28.1% to 30.4%, and the arsenic grade decreased from 5.4% to 4.8%. The arsenic removal rate increased from 90.5% to 92.3%, achieving an improvement in product purity. However, the total antimony recovery rate decreased from 74.6% to 71.2%, and the antimony concentrate recovery rate decreased from 93.1% to 90.7%. This indicates that while increasing the sodium sulfide dosage enhanced the inhibition of antimony ore and the arsenic removal effect, excessive reagent dosage could lead to excessive inhibition and loss of some antimony ore. Compared with the baseline data in Table 1, this demonstrates the balanced impact of reagent dosage on separation effect and recovery rate.

[0046] Example 3 follows the same process steps as Example 1, except that the particle size control index for the secondary grinding is changed.

[0047] Specifically, the proportion of 200 mesh in the secondary grinding was reduced from 90% to 85%, while the remaining process parameters (including reagent dosage, pH value, flotation time, etc.) remained the same as in Example 1.

[0048] The process parameters for Example 3 are shown in Table 3:

[0049] Material Name Antimony grade Arsenic grade Antimony recovery rate Arsenic removal rate High-arsenic pyrite concentrate (raw material) 4.0% 21.0% - - Antimony crude concentrate 8.9% 11.2% 88.5% 47.6% High-grade antimony concentrate 24.7% 6.7% 68.3% 87.2% Arsenic-removed sulfur concentrate 0.35% 26.5% - -

[0050] Table 3

[0051] By reducing the proportion of -200 mesh in secondary grinding from 90% to 85%, Table 3 data shows that the antimony grade in the antimony concentrate decreased from 10.2% to 8.9%, while the arsenic grade increased from 9.8% to 11.2%. In the high-grade antimony concentrate, the antimony grade decreased from 28.1% to 24.7%, while the arsenic grade increased from 5.4% to 6.7%. The total antimony recovery rate decreased from 74.6% to 68.3%, and the arsenic removal rate decreased from 90.5% to 87.2%. Compared with the baseline data in Table 1, all core indicators showed a decline. This is because the coarser grinding particle size led to insufficient liberation of antimony ore and arsenopyrite, making precise separation impossible during flotation. This confirms the crucial supporting role of secondary grinding particle size in separation efficiency and demonstrates the scientific basis of setting the particle size range of 85%-95% in this invention.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for separating arsenic and antimony and recovering antimony from antimony ore based on secondary resource replenishment, characterized in that, Includes the following steps: S1. Secondary grinding: The high arsenic-sulfur iron concentrate is ground to a particle size of -200 mesh with a ratio of 85%-95% to obtain grinding slurry. S2. Reverse flotation for arsenic removal: The grinding slurry is fed into the reverse flotation system. Sodium carbonate is added to the slurry to adjust the pH to 9-10. Then activated carbon and sodium sulfide are added and stirred. Subsequently, xanthate and No. 2 oil are added. Reverse flotation is carried out using a 1-rougher-3-cleaner flotation process to obtain antimony rough concentrate and arsenic-removed sulfur concentrate. S3. Positive flotation enrichment: After the antimony rough concentrate is concentrated, it is sent to the positive flotation system. Sulfuric acid is added to the slurry to adjust the pH to 6-7. Then activated carbon, lead nitrate, and butyl ammonium black reagent are added and stirred. Positive flotation is carried out using a 1 roughing and 3 cleaning flotation process. No inhibitors are added during the flotation process to obtain high-grade antimony concentrate, thus completing the separation of arsenic and antimony and the recovery of antimony.

2. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, In step 2, the amount of activated carbon added is 3-5 kg / t of high arsenic pyrite concentrate, and the amount of sodium sulfide added in the reverse flotation roughing process is 800-1200 g / t of high arsenic pyrite concentrate.

3. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 2, characterized in that, In step 2, during the three cleaning processes of reverse flotation, the amount of sodium sulfide added in the order of flotation is 500 g / t, 300 g / t, and 100 g / t of high arsenic pyrite concentrate.

4. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, In step 2, the reverse flotation system is equipped with two mixing tanks. The first mixing tank is used to adjust the pH of the slurry and add and stir activated carbon and sodium sulfide, while the second mixing tank is used to add and stir xanthate and No. 2 oil.

5. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, In step 2, the reverse flotation process also includes four scavenging steps, during which xanthate and No. 2 oil are continuously added. The underflow product of the reverse flotation scavenging steps is the antimony rough concentrate.

6. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, In step 3, the amount of activated carbon added is 2 kg / t antimony concentrate, and the amount of lead nitrate added is 1000 g / t antimony concentrate.

7. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, In step 3, the concentration of antimony crude concentrate is completed by an 8-meter thickener. The concentrated antimony crude concentrate slurry is then fed into the mixing tank of the positive flotation system for reagent addition and mixing.

8. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, When the antimony content of the high-arsenic pyrite concentrate is less than 1%, a trace amount of copper sulfate is added to the slurry in the reverse flotation scavenging process of step 2. The amount of copper sulfate added is such that it does not activate the antimony ore.

9. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, When the required antimony content for the recycled product is only ≥2%, the positive flotation enrichment process in step 3 is omitted, and the antimony crude concentrate obtained in step 2 is used as the antimony recycled product.

10. The antimony-arsenic separation and antimony recovery process based on secondary resource replenishment in antimony ore according to claim 1, characterized in that, The production water used in the process is pretreated by a wastewater treatment system. The pretreatment adjusts the pH of the production water to 5-6 and reduces the COD of the water. The pretreated production water is used for secondary grinding, reverse flotation for arsenic removal, or forward flotation for enrichment.

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