A method for promoting the flotation of iron franklinite using a complexing agent

Abstract

The application belongs to the technical field of mineral processing, and discloses a method and system for promoting and activating the flotation of iron marmatite by using a complexing agent; after crushing and grinding the iron marmatite ore or mixed ore sample to be treated, a slurry is prepared and slurried; EDTA-2Na, an activator of copper sulfate and a xanthate collector are sequentially added to the obtained slurry, and the slurry is slurried; the obtained slurry is subjected to flotation according to a conventional process, and an iron marmatite concentrate can be obtained; according to the new technical route of dissolving and complexing zinc and iron ions on the surface of iron marmatite by EDTA-2Na, EDTA-2Na is added to the flotation slurry system to create the condition of micro-dissolution of the surface of iron marmatite, and under this reagent system, a NH4 + -Cu 2+ system is formed, the surface of the iron marmatite mineral is successfully promoted to form a more active interface, the recovery rate of the zinc concentrate is improved, the process is simple and easy to operate, the amount of copper sulfate is reduced, and the development of green mineral technology is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of mineral processing technology, and in particular relates to a method and system for promoting the enhanced activation flotation of iron sphalerite using a complexing agent. Background Technology

[0002] Zinc, as a very important non-ferrous metal raw material, plays a vital role in the development of the national economy. Sphalerite is a sulfide mineral whose main chemical component is ZnS, and whose crystals belong to the isometric crystal system. It usually contains iron impurities; generally, sphalerite with an iron content greater than 6% is called iron sphalerite, and when the iron content reaches 18% or more, it is called ultra-high iron sphalerite. In addition, it often contains rare elements such as manganese, cadmium, indium, thallium, gallium, and germanium.

[0003] Zinc atoms on the zinc sphalerite lattice are affected by Fe 3+ Substitution causes an imbalance in its valence and charge states, resulting in two Zn atoms. 2+ Transform into Zn + This process reduces hole concentration and increases electron density, making sphalerite an N-type semiconductor mineral, iron-rich sphalerite. Iron-rich sphalerite exhibits a strong repulsive effect on xanthate anions, hindering collector adsorption. Therefore, iron-rich sphalerite has lower floatability than zinc sphalerite. Higher iron content leads to greater increases in lattice parameters and decreases in crystal surface energy, resulting in greater changes in ionic bonds and semiconductivity within the lattice, thus further reducing floatability.

[0004] Iron sphalerite possesses characteristics of both sphalerite and pyrite, making its flotation challenging due to the difficulty in separating it from pyrite. In recent years, numerous mineral processing workers have conducted extensive theoretical and practical research on the flotation of iron sphalerite, achieving significant progress.

[0005] Currently, copper sulfate-activated flotation is mainly used to float iron sphalerite, followed by froth collection flotation of iron sphalerite with the aid of xanthate. However, copper sulfate reagent has poor selectivity and cannot achieve ideal results.

[0006] It is known that EDTA-2Na can chelate zinc and iron on the surface of minerals to form stable adsorption, thereby increasing the number of active sites on the mineral surface and making it easier for them to be activated by copper sulfate.

[0007] Based on the above analysis, the problems and shortcomings of the existing technology are as follows:

[0008] Currently, copper sulfate-activated flotation is mainly used to float iron sphalerite, followed by froth collection flotation with xanthate. However, copper sulfate reagents have poor selectivity and cannot achieve ideal results. Conventional iron sphalerite flotation reagents suffer from technical challenges such as poor selectivity, insufficient activation, and unsatisfactory collection. Summary of the Invention

[0009] To address the problems existing in the prior art, the present invention provides a method and system for promoting enhanced activation flotation of iron sphalerite using a complexing agent.

[0010] This invention is implemented as follows: a method for promoting enhanced activation flotation of iron sphalerite using a complexing agent, wherein the method comprises:

[0011] Step 1: Crush and grind the iron sphalerite to be processed, prepare the slurry, and adjust the slurry to the required concentration of qualified slurry;

[0012] Step 2: Add the organic complexing agent EDTA-2Na to the obtained slurry as an activating solvent to pretreat the surface of the iron sphalerite to improve the selectivity of the reaction with the reagent, and adjust the slurry.

[0013] Step 3: Add copper sulfate to adjust the slurry and activate the minerals to form a highly active activation interface;

[0014] Step 4: Add butyl xanthate and mix the paste;

[0015] Step 5: Add foaming agent No. 2 oil to adjust the slurry and increase the hydrophobicity of the sphalerite surface;

[0016] Step six: Perform flotation according to conventional processes to obtain iron sphalerite concentrate.

[0017] Furthermore, in step one, the iron sphalerite to be processed is crushed and ground until the particles with a fineness of -74μm account for 85% of the total, or the mixed ore sample is ground to a fineness of -200 to 325 mesh, and a slurry is prepared and adjusted to a slurry mass percentage concentration of 38 to 39% for 1 minute.

[0018] Furthermore, the organic complexing agent in step two is EDTA-2Na, and the amount added is 1.0 × 10⁻⁶. -3 mol / L, slurry preparation time is 3 min.

[0019] Furthermore, the amount of copper sulfate added in step three is 1.0 × 10⁻⁶. -5 After adding copper sulfate at a concentration of mol / L, slurry was prepared for 3 minutes.

[0020] Furthermore, the amount of butyl xanthate added in step four is 3 × 10⁻⁶. -4 After adding butyl xanthate as a collector at mol / L, the mixture was prepared for 3 minutes.

[0021] Furthermore, in step five, No. 2 oil is added and mixed for 1 minute to obtain flotation concentrate slurry.

[0022] Another object of the present invention is to provide a system for promoting enhanced activation flotation of iron sphalerite using a complexing agent, the system comprising:

[0023] For activation, EDTA-2Na was used as the activating solvent to pre-activate the surface of sphalerite and copper sulfate was added to further activate the mineral.

[0024] In terms of collection, butyl xanthate is added as a collector to increase the hydrophobicity of the surface of sphalerite;

[0025] The flotation results yield iron sphalerite concentrate.

[0026] Another objective of this invention is to provide an information data processing terminal for implementing the flotation system that utilizes a complexing agent to enhance the activation of sphalerite.

[0027] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this invention are as follows:

[0028] First, when EDTA-2Na dissolves in water, zinc (iron) ions and ammonium ions on the surface of sphalerite will first form a zinc (iron)-ammonia complex in the solution. At this point, because vacancies appear at zinc and iron sites on the surface of sphalerite, the mineral lattice has more defects, requiring more metal ions to fill them. Therefore, after adding copper sulfate, more Cu... 2+ This allows the reagent to enter the mineral lattice, significantly enhancing the surface activity and selectivity of the mineral. This facilitates the interaction between the reagent and the mineral surface, promoting rapid and efficient adsorption of the xanthate collector. It also enhances the hydrophobicity of the zinc sulfide mineral surface, thereby promoting the activation and flotation of sphalerite. Furthermore, it reduces the required amount of copper sulfate, decreases the content of other impurities or gangue minerals in the flotation process, lowers beneficiation costs, and achieves satisfactory separation indicators. This method economically and efficiently solves the technical problems of poor selectivity, weak activation ability, and unsatisfactory collection effects inherent in conventional sphalerite flotation reagents.

[0029] Secondly, after EDTA-2Na pre-activation treatment and further activation with copper sulfate, the increased lattice defects on the surface of iron sphalerite can be converted by more Cu. 2+ Upon entering the filler, the number of active sites on the mineral surface increases significantly, resulting in enhanced surface activity and selectivity. This is highly beneficial for subsequent collection and flotation using xanthate collectors, thereby improving the separation capacity of sphalerite and achieving enhanced activation flotation of sphalerite. Simultaneously, it saves on beneficiation costs, bringing greater economic benefits to the beneficiation and utilization of sphalerite.

[0030] The technical solution of this invention achieves simultaneous collection and flotation of iron and zinc, improves the recovery rate of iron sphalerite, reduces the content of other impurities or gangue minerals in the flotation, and lowers the beneficiation cost.

[0031] The technical solution of this invention has high expected returns after transformation, reduces the cost of using conventional activator copper sulfate, and improves the economic benefits of ferrous sphalerite beneficiation in the beneficiation plant.

[0032] Third, this invention solves the problems of poor activation and low flotation efficiency in the existing technology for flotation of sphalerite. In traditional flotation methods for sphalerite, the surface of the mineral is difficult to activate effectively, resulting in insufficient selectivity of the reagents for sphalerite, which affects the flotation recovery rate and concentrate quality. In addition, the flotation reagents in conventional methods do not have sufficient effect on the mineral surface, making it difficult to achieve efficient flotation separation.

[0033] By introducing the organic complexing agent EDTA-2Na as a pretreatment agent, this invention significantly improves the selectivity of the interaction between the iron sphalerite surface and the reagents. EDTA-2Na can form stable complexes with metal ions on the iron sphalerite surface, removing interfering substances from the mineral surface, thereby increasing the adsorption efficiency of activators such as copper sulfate on the mineral surface. This treatment step significantly enhances the activation effect on the mineral surface, forming a highly active activation interface, laying the foundation for the efficient operation of subsequent flotation processes.

[0034] After activating the mineral with copper sulfate, this invention further enhances the hydrophobicity of the sphalerite surface by adding butyl xanthate and frother No. 2 oil. Butyl xanthate, acting as a collector, effectively adsorbs onto the activated mineral surface, improving its flotation activity. Frothing agent No. 2 oil, by increasing the hydrophobicity of the mineral surface, promotes bubble generation and stabilization, thereby improving the mineral recovery rate and concentrate purity during flotation.

[0035] This invention significantly improves the flotation efficiency and concentrate quality of sphalerite by pretreatment with the complexing agent EDTA-2Na, activation with copper sulfate, and the combined action of butyl xanthate and frother No. 2 oil. Compared with existing technologies, this invention achieves significant technological progress in selectivity and recovery rate during the flotation process, solving the technical problems of poor activation effect and low flotation efficiency in sphalerite flotation, and providing new methods and ideas for the efficient utilization of mineral resources.

[0036] Fourth, this invention solves the problems of low flotation efficiency, low recovery rate, and poor selectivity of sphalerite in existing technologies by using a complexing agent to promote enhanced activation flotation. Traditional flotation methods are easily affected by ore surface contamination, poor reagent selectivity, and insufficient mineral activation when processing complex ores, resulting in unsatisfactory flotation effects. This invention introduces the organic complexing agent EDTA-2Na to pretreat the mineral surface, improving the activity of the mineral surface and the selectivity of reagent action, thereby significantly improving the flotation effect of sphalerite.

[0037] The main parameters of this invention include the specific addition amounts and conditioning times of the organic complexing agent EDTA-2Na, copper sulfate, butyl xanthate, and No. 2 oil. Through experimental optimization, these parameters were set as follows: 1.0 × 10⁻³ mol / L EDTA-2Na with a conditioning time of 3 minutes; 1.0 × 10⁻⁵ mol / L copper sulfate with a conditioning time of 3 minutes; 3 × 10⁻⁴ mol / L butyl xanthate with a conditioning time of 3 minutes; and a mixing time of 1 minute for No. 2 oil. These parameters were determined based on extensive experimental data, ensuring optimal reagent efficacy and improving flotation efficiency and selectivity.

[0038] In terms of algorithms and mathematical models, this invention employs a mechanism model of complexing agents promoting mineral surface activation. By forming stable complexes with metal ions on the mineral surface through the complexing agent EDTA-2Na, the reactivity of the mineral surface is improved, enhancing the interaction between the reagent and the mineral surface. Copper sulfate, as an activator, further promotes mineral flotation by forming a highly active sulfide interface with the mineral surface. This model combines the theories of chemical reaction kinetics and surface chemistry, providing a quantitative description of the flotation process and a scientific basis for optimizing process parameters.

[0039] The significant technological advancement of this invention lies in the substantial improvement in flotation recovery and concentrate grade of sphalerite through the combined use of complexing agents and activators. Compared to traditional methods, this invention enhances mineral selectivity and flotation efficiency, reduces reagent usage and flotation time, and lowers production costs. Simultaneously, through optimized flotation processes and parameter control, it significantly improves resource utilization and economic benefits of sphalerite. This method is not only applicable to the flotation of sphalerite but can also be extended to the flotation of other complex ores, demonstrating broad industrial application prospects and promotional value. Attached Figure Description

[0040] Figure 1 This is a flowchart of a method for promoting enhanced activation flotation of iron sphalerite using a complexing agent, provided in an embodiment of the present invention.

[0041] Figure 2This is a process flow diagram of the method for promoting enhanced activation flotation of iron sphalerite using complexing agents, provided in an embodiment of the present invention.

[0042] Figure 3 This is a system module diagram of the method for promoting enhanced activation flotation of iron sphalerite using complexing agents, as provided in an embodiment of the present invention.

[0043] Figure 4 This is a flotation flow chart of activated flotation of sphalerite provided in Embodiment 1 of the present invention; Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0045] The method for enhancing the activation flotation of sphalerite using a complexing agent, provided in this invention, significantly improves the flotation efficiency of sphalerite through specific steps and reagent usage. Two specific embodiments are listed below to illustrate the application of this invention.

[0046] Example 1

[0047] 1) Crushing and grinding: The raw iron sphalerite ore to be processed is crushed and ground to a suitable particle size for subsequent processing.

[0048] 2) Preparation of slurry: Add the crushed iron sphalerite to water to prepare a slurry with a concentration of 25%.

[0049] 3) Add organic complexing agent EDTA-2Na: Add 0.5 kg of organic complexing agent EDTA-2Na to the slurry per ton of dry ore. Stir to ensure full contact between EDTA-2Na and the surface of the sphalerite for pretreatment. The pretreatment time is 30 minutes.

[0050] 4) Activation with copper sulfate: Add copper sulfate to the pretreated slurry at a rate of 1 kg per ton of dry ore. Continue stirring to allow the copper sulfate to fully react with the minerals, forming a highly active activation interface. The activation time is 20 minutes.

[0051] 5) Add butyl xanthate: Add butyl xanthate as a collector to the activated slurry at a rate of 0.8 kg per ton of dry ore. Stir to ensure the butyl xanthate reacts fully with the mineral.

[0052] 6) Add frother: Add frother No. 2 oil at a rate of 0.05 kg per ton of slurry. Continue stirring to increase the hydrophobicity of the sphalerite surface.

[0053] 7) Flotation: Flotation operations are performed according to conventional flotation processes to obtain iron sphalerite concentrate. Comparative experiments show that the flotation recovery rate of iron sphalerite is increased by more than 10% after using the method of this invention.

[0054] Example 2

[0055] 1) Crushing and grinding: Similar to Example 1, the iron sphalerite to be processed is crushed and ground.

[0056] 2) Prepare slurry: Prepare slurry with a concentration of 30%.

[0057] 3) Add organic complexing agent EDTA-2Na: Add EDTA-2Na to the slurry at a rate of 0.8 kg per ton of dry ore. The pretreatment time is 45 minutes.

[0058] 4) Activation with copper sulfate: Add copper sulfate at a rate of 1.2 kg per ton of dry ore. Activation time is 30 minutes.

[0059] 5) Add butyl xanthate: Add butyl xanthate as a collector at a rate of 1 kg per ton of dry ore.

[0060] 6) Add foaming agent: Add foaming agent No. 2 oil at a rate of 0.08 kg per ton of slurry.

[0061] 7) Flotation: Flotation was carried out according to conventional flotation processes. Comparative experiments showed that, under the conditions of Example 2, the flotation recovery rate of sphalerite was further improved, reaching over 90%.

[0062] These two embodiments demonstrate the effectiveness of this invention in the flotation of iron sphalerite. By optimizing the amounts of complexing and activating agents, as well as the pretreatment and activation times, the flotation recovery rate of iron sphalerite can be significantly improved, thereby achieving efficient and environmentally friendly utilization of mineral resources.

[0063] like Figure 1 , Figure 2 As shown, the method for promoting enhanced activation flotation of iron sphalerite using a complexing agent, provided in this embodiment of the invention, includes the following steps:

[0064] S101, crush and grind the iron sphalerite to be processed, prepare slurry, and adjust the slurry to the required concentration of qualified slurry;

[0065] S102, add organic complexing agent EDTA-2Na to the obtained slurry as a complexing agent to pretreat the surface of iron sphalerite to improve the selectivity of the reaction with the reagent, and adjust the slurry;

[0066] S103, with the addition of copper sulfate, is used to adjust the slurry and activate the minerals, forming a highly active activation interface;

[0067] S104, add butyl xanthate, and mix into a paste;

[0068] S105, with added foaming agent No. 2 oil, is used to adjust the slurry and increase the hydrophobicity of the iron sphalerite surface;

[0069] S106, after being subjected to flotation using conventional processes, yields iron sphalerite concentrate.

[0070] In the first step of this invention, the iron sphalerite to be processed is crushed and ground until the particles with a fineness of -74μm account for 85% of the total, or the mixed ore sample is ground to a fineness of -200 to 325 mesh, and a slurry is prepared and adjusted to a slurry mass percentage concentration of 38 to 39% for 1 minute.

[0071] The organic complexing agent in step two of this embodiment is EDTA-2Na, and the amount added is 1.0 × 10⁻⁶. -3 mol / L, slurry preparation time is 3 min.

[0072] In step three of this embodiment of the invention, the amount of copper sulfate added is 1.0 × 10⁻⁶. -5 After adding copper sulfate at a concentration of mol / L, slurry was prepared for 3 minutes.

[0073] The amount of butyl xanthate added in step four of the present invention embodiment is 3 × 10 -4 After adding butyl xanthate as a collector at mol / L, the mixture was prepared for 3 minutes.

[0074] In step five of this embodiment of the invention, No. 2 oil is added and stirred for 1 minute to obtain flotation concentrate slurry.

[0075] The method for enhancing the activation flotation of sphalerite using a complexing agent provided in this invention involves adding EDTA-2Na to the flotation pulp system to achieve micro-dissolution of the sphalerite surface. Zinc (iron) ions and ammonium ions on the sphalerite surface first form zinc (iron)-ammonia complexes in the solution. At this point, due to the vacancies in zinc and iron sites on the sphalerite surface, the mineral lattice exhibits more defects, requiring more metal ions to fill them. Therefore, the addition of copper sulfate further enhances the Cu content. 2+ The copper ions are able to enter the mineral lattice, and their activity and selectivity on the surface of sphalerite are enhanced. This not only creates favorable conditions for the subsequent adsorption and collection of xanthate, but also enhances the hydrophobicity of the mineral surface. Compared with the existing conventional mineral processing flow, the amount of conventional activator copper sulfate is reduced, which effectively improves the floatability of sphalerite.

[0076] like Figure 3 As shown, the system for enhancing the activation flotation of iron sphalerite using a complexing agent, provided in this embodiment of the invention, includes:

[0077] For activation, EDTA-2Na was used as the activating solvent to pre-activate the surface of sphalerite and copper sulfate was added to further activate the mineral.

[0078] In terms of collection, butyl xanthate is added as a collector to increase the hydrophobicity of the surface of sphalerite;

[0079] The flotation results yield iron sphalerite concentrate.

[0080] The method for enhancing the activation and flotation of iron sphalerite using a complexing agent, as provided in the application embodiment of the present invention, is applied to an information data processing terminal, which is used to implement the flotation system for enhancing the activation and flotation of iron sphalerite using a complexing agent.

[0081] The embodiments of the present invention have achieved some positive results during the research and development or use process, and have indeed great advantages compared with the prior art. The following content describes them in conjunction with the data, charts and other information of the experimental process.

[0082] Example 1: Complexation-enhanced copper activation flotation experiment on iron sphalerite ore, such as... Figure 4 As shown, the specific steps are as follows:

[0083] For a certain iron sphalerite ore in Yunnan Province, with an iron content of 6.24% and a zinc content of 51.84%, the iron sphalerite ore beneficiation activator of this invention is used for beneficiation treatment, specifically including the following steps:

[0084] (1) Grind the crushed iron sphalerite until the -74μm particle size accounts for 85%, and adjust the slurry mass percentage concentration to 38%.

[0085] (2) Zinc mineral flotation separation operation: The process flow of "one roughing, two cleaning and one scavenging" is adopted. During the roughing process, 1000 ml / t of complexing agent EDTA-2Na is added to the slurry obtained in step (1) and stirred for 3 min. Then, 250 g / t of copper sulfate is added and stirred for 10 min. Next, 60 g / t of butyl xanthate is added and stirred for 2 min. Finally, 20 g / t of frother pine oil is added, mixed and stirred, and after aeration and flotation for 5 min, the frothy product zinc crude concentrate is obtained.

[0086] (3) Zinc concentrate and zinc tailings are obtained by zinc beneficiation of zinc rough concentrate: the zinc rough concentrate is beneficiated by two beneficiations to obtain the final zinc concentrate. The concentrate obtained by each beneficiation enters the next beneficiation process in sequence, and the beneficiation tailings of each stage are returned to the previous stage flotation to enter the circulating flotation process in sequence.

[0087] (4) Zinc roughing tailings are scavenged to obtain zinc middlings and zinc scavenging tailings: the zinc middlings obtained from the first scavenging are returned to the zinc roughing process and enter the zinc roughing cycle. Copper sulfate is added in scavenging I at a dosage of 50 g / t, and butyl xanthate collector at a dosage of 20 g / t.

[0088] (5) In this embodiment, the zinc concentrate grade obtained was 78.15%, and the recovery rate was 90.63%.

[0089] Example 2: This embodiment of the invention provides a novel method for complexation enhancement and activation of iron sphalerite, such as... Figure 2 As shown, the specific steps are as follows:

[0090] (1) The iron content in this sphalerite is 8.76% and the zinc content is 49.54%. The zinc has a complex distribution and a fine particle size. The particle size of -74μm accounts for 85% after grinding. The slurry mass percentage concentration is adjusted to 39%.

[0091] (2) Add complexing agent EDTA-2Na 500g / t to the slurry and stir thoroughly for 5min;

[0092] (3) Add 250 g / t of copper sulfate activator to the slurry in (2) and stir for 3 min. Finally, add 80 g / t of butyl xanthate and 20 g / t of No. 2 oil and stir for 2 min. Then, aeration flotation is carried out to obtain zinc concentrate and tailings.

[0093] (4) By testing the flotation performance of iron sphalerite, an iron sphalerite concentrate with a grade of 74.13% and a recovery rate of 88.25% can be obtained. Under the same conditions, compared with the iron sphalerite concentrate with the same amount of copper sulfate as the activator of the present invention, the iron sphalerite concentrate obtained has a grade of 70.32% and a recovery rate of 80.17%.

[0094] The following are two specific embodiments listed according to the above claims:

[0095] Application Example 1

[0096] Step 1: Crush and grind the sphalerite to be processed until particles with a fineness of -74μm account for 85% of the total. Next, prepare the slurry and adjust its mass percentage concentration to 38.5%, with a conditioning time of 1 minute to ensure the homogeneity and appropriate concentration of the slurry.

[0097] Step 2: Add the organic complexing agent EDTA-2Na to the slurry at a concentration of 1.0 × 10⁻³ mol / L. This pretreatment of the sphalerite surface enhances its selectivity for subsequent reagent interactions. The slurry should be prepared for 3 minutes to ensure the complexing agent fully engages.

[0098] Step 3: Add copper sulfate to the slurry at a concentration of 1.0 × 10⁻⁵ mol / L to activate the minerals and form a highly active activation interface. After adding copper sulfate, continue adjusting the slurry for 3 minutes to ensure that the activator is evenly distributed in the slurry.

[0099] Step 4: Add butyl xanthate to the slurry at a concentration of 3 × 10⁻⁴ mol / L as a collector. After addition, continue to adjust the slurry for 3 minutes to allow the collector to fully adsorb onto the mineral surface.

[0100] Step 5: Finally, add frother No. 2 oil to the slurry and mix for 1 minute to increase the hydrophobicity of the sphalerite surface and prepare for the flotation process.

[0101] Step 6: Perform flotation operations according to conventional flotation processes to finally obtain iron sphalerite concentrate.

[0102] Application Example 2

[0103] Step 1: Crush and grind the mixed mineral sample to a fineness of -200 to 325 mesh. Then prepare the slurry and adjust its mass percentage concentration to 39%, with a conditioning time of 1 minute, to obtain a uniform slurry with a suitable concentration.

[0104] Step 2: Add 1.0 × 10⁻³ mol / L EDTA-2Na to the slurry as an organic complexing agent to pretreat the surface of the sphalerite. Adjust the slurry for 3 minutes to ensure the complexing agent fully interacts with the mineral surface.

[0105] Step 3: Add 1.0 × 10⁻⁵ mol / L copper sulfate to the slurry for mineral activation. After adding, continue to adjust the slurry for 3 minutes to ensure uniform distribution and full action of the activator.

[0106] Step 4: Add 3×10-4 mol / L butyl xanthate to the slurry as a collector, and continue to adjust the slurry for 3 minutes to allow the collector to be fully adsorbed on the activated mineral surface.

[0107] Step 5: Add frother No. 2 oil and mix for 1 minute to increase the hydrophobicity of the sphalerite surface. This step provides favorable conditions for the subsequent flotation process.

[0108] Step Six: Perform flotation operations according to conventional flotation processes to finally obtain high-quality iron sphalerite concentrate products.

[0109] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for promoting enhanced activation flotation of iron sphalerite using a complexing agent, characterized in that, include: Step 1: Crush and grind the iron sphalerite to be processed, prepare the slurry, and adjust the slurry to the required concentration of qualified slurry; Step 2: Add the organic complexing agent EDTA-2Na to the obtained slurry as an activating solvent to pretreat the surface of the iron sphalerite to improve the selectivity of the reaction with the reagent, and adjust the slurry. Step 3: Add copper sulfate to adjust the slurry and activate the minerals to form a highly active activation interface; Step 4: Add butyl xanthate and mix the paste; Step 5: Add foaming agent No. 2 oil to adjust the slurry and increase the hydrophobicity of the sphalerite surface; Step six: Perform flotation according to conventional processes to obtain iron sphalerite concentrate.

2. The method for promoting enhanced activation flotation of iron sphalerite using a complexing agent according to claim 1, characterized in that, In step one, the iron sphalerite to be processed is crushed and ground to a fineness of -74μm particles accounting for 85% of the total, or the mixed ore sample is ground to a fineness of -200 to 325 mesh, and a slurry is prepared and adjusted to a slurry mass percentage concentration of 38 to 39% for 1 minute.

3. The method for promoting enhanced activation flotation of iron sphalerite using a complexing agent according to claim 1, characterized in that, The organic complexing agent in step two is EDTA-2Na, and the amount added is 1.0 × 10⁻⁶. -3 mol / L, slurry preparation time is 3 min.

4. The method for promoting enhanced activation flotation of iron sphalerite using a complexing agent according to claim 1, characterized in that, The amount of copper sulfate added in step three is 1.0 × 10⁻⁶. -5 After adding copper sulfate at a concentration of mol / L, slurry was prepared for 3 minutes.

5. The method for promoting enhanced activation flotation of iron sphalerite using a complexing agent according to claim 1, characterized in that, The amount of butyl xanthate added in step four is 3 × 10⁻⁶. -4 After adding butyl xanthate as a collector at mol / L, the mixture was prepared for 3 minutes.

6. The method for promoting enhanced activation flotation of iron sphalerite using a complexing agent according to claim 1, characterized in that, In step five, add No. 2 oil and mix for 1 minute to obtain flotation concentrate slurry.

7. A system for implementing the enhanced activation flotation of sphalerite using a complexing agent as described in any one of claims 1-6, characterized in that, The system for enhancing and activating flotation of sphalerite using complexing agents includes: The pretreatment module is used to pretreat the surface of iron sphalerite using EDTA-2Na as an activating solvent; The activation module is used to activate minerals by adding copper sulfate. The collecting module is used to add the collector butyl xanthate to increase the hydrophobicity of the sphalerite surface; The flotation module is used to obtain iron sphalerite concentrate.

Images