A method for promoting sulfide flotation of a galena ore using triethylenetetramine

Abstract

The present application belongs to the technical field of mineral processing, and discloses a method for promoting sulfidization flotation of hemimorphite by using triethylenetetramine. In order to solve the problems of low sulfidization efficiency and poor flotation effect of hemimorphite caused by the shielding of active zinc sites on the surface by silicon-oxygen components, triethylenetetramine is added to the ore pulp for surface pretreatment before the sulfidization step. As a polydentate organic amine, triethylenetetramine can strongly complex with zinc ions on the surface of hemimorphite, thereby increasing the active sites on the surface of the mineral. After the pretreatment of triethylenetetramine, the sulfidation agent, activator, collector and frother are sequentially added for conventional flotation, and a high-recovery hemimorphite concentrate can be obtained. The present application can improve the pure mineral flotation recovery rate from 52.31% of the traditional method to 85.54%, and the actual ore flotation recovery rate can also reach 82.41%. The present application has the advantages of simple process, small amount of reagent, strong selectivity, environmental friendliness and the like, and provides a new way for the efficient utilization of zinc oxide ore.

Description

Technical Field

[0001] This invention belongs to the field of mineral processing technology, specifically relating to a flotation recovery method for zinc oxide minerals, and particularly a flotation method that enhances the surface sulfidation process of hemimorphite by adding specific organic amines. Background Technology

[0002] Hemimorphite is an important zinc oxide mineral and a crucial resource for zinc metal extraction. However, due to the zinc atoms being partially surrounded by a silicon-oxygen tetrahedral network in its crystal structure, the active zinc sites on the mineral surface are not sufficiently exposed, resulting in poor natural floatability and making direct recovery using conventional collectors difficult.

[0003] Currently, the industrial recovery of hemimorphite mainly employs the sulfidation-xanthate flotation method. This method first treats the slurry with sulfiding agents such as sodium sulfide to form a thin film of zinc sulfide (ZnS) on the mineral surface, making its surface properties similar to those of zinc sulfide minerals. Then, xanthate collectors are used for collection. However, the actual effect of this process is far from ideal. The main bottleneck lies in the difficulty of achieving an effective and uniform initial sulfidation reaction on the hemimorphite surface. The fundamental reason is the insufficient number and weak reactivity of active zinc sites on the mineral surface that can be directly acted upon by sulfide ions. This results in a sparse and unstable zinc sulfide film, which cannot provide sufficient efficient sites for subsequent xanthate adsorption.

[0004] Therefore, developing modified reagents that can effectively pretreat the surface of hemimorphite, significantly increase and activate its surface zinc reaction sites, thereby improving initial sulfidation efficiency, is key to improving the overall flotation recovery rate of hemimorphite. Summary of the Invention

[0005] This invention aims to overcome the problem of low sulfidation efficiency caused by insufficient reaction sites on the mineral surface in existing hemipolar ore sulfidation flotation technology, and provides a flotation promotion method with a simple process and significant effect. This method introduces a highly efficient surface modifier, triethylenetetramine, to pretreat the mineral surface before the sulfidation step, fundamentally enhancing the sulfidation process and ultimately achieving a significant increase in the recovery rate of hemipolar ore.

[0006] This invention is implemented as follows: a method for promoting the sulfidation flotation of heterodyne using triethylenetetramine, comprising the following steps:

[0007] Step 1: The raw or pure mineral of the heterodyne, which has been crushed and ground to the target fineness, is mixed with water and stirred in a flotation machine to form a homogeneous slurry.

[0008] Step 2: Add triethylenetetramine solution to the slurry from Step 1 and continue stirring to carry out the surface modification reaction.

[0009] Step 3: Add the sulfiding agent to the slurry modified in Step 2 and stir to ensure the sulfidation reaction proceeds fully. Then add the activator.

[0010] Step four: Add collector and frother to the activated slurry; perform aeration flotation, collect the frothy product as heterodyne concentrate, and the product in the tank as tailings.

[0011] Furthermore, for the pure mineral test, in step one, 2.00 g of pure anisotropic mineral (-200~+400 mesh) is placed in a 40 ml micro flotation cell, 40 ml of deionized water is added, and the slurry is prepared for 1 min; for the actual ore test, for the pure mineral test, after the raw ore in step one is crushed and ground, the particle size is more than 85% of the particle size of -0.074 mm, the slurry is prepared for 1-3 min, and the mass concentration of the obtained slurry is 5%-35%.

[0012] Furthermore, the amount of triethylenetetramine added in step two is such that its concentration in the slurry is 4.0 × 10⁻⁶. -4 mol / L; surface modification stirring time was 3 min.

[0013] Furthermore, the sulfiding agent mentioned in step three is sodium sulfide (Na2S·9H2O), and the amount added is such that its concentration in the slurry is 8.0 × 10⁻⁶. -4 The concentration of the activator was mol / L, and the stirring time for the sulfidation reaction was 5 min. The activator was copper sulfate (CuSO4·5H2O), and its concentration in the slurry was 5.0 × 10⁻⁶ mol / L. -4 The concentration was mol / L, and the stirring time for the activation reaction was 3 min.

[0014] Furthermore, the collector mentioned in step four is a xanthate-based collector, preferably sodium isoamyl xanthate, and the amount added is such that its concentration in the pulp is 5.0 × 10⁻⁶. -4 mol / L; the foaming agent is No. 2 oil, and the addition amount is 2 μL.

[0015] Furthermore, for actual ore flotation, the method employs a closed-circuit process with one rougher, two scavengers, and two cleaners, and triethylenetetramine is added during each scavenging operation. Specific parameters are as follows:

[0016] Roughing process: Sodium carbonate 1200 g / t, triethylenetetramine dosage 600 g / (sodium humate / sodium hexametaphosphate = 2 / 1) 600 g / t, sodium sulfide dosage 1200 g / t, activator dosage 500 g / t, collector dosage 500 g / t, No. 2 oil 60 g / t;

[0017] One-stage scavenging: Sodium carbonate 500 g / t, triethylenetetramine 300 g / t, inhibitor (sodium humate / sodium hexametaphosphate = 2 / 1) 200 g / t, sodium sulfide 600 g / t, activator 200 g / t, collector 200 g / t, No. 2 oil 30 g / t;

[0018] Secondary scavenging: Sodium carbonate 200 g / t, triethylenetetramine 150 g / t, inhibitor (sodium humate / sodium hexametaphosphate = 2 / 1) 100 g / t, sodium sulfide 300 g / t, activator 50 g / t, collector 100 g / t.

[0019] Selected work: The total amount of inhibitor (sodium humate / sodium hexametaphosphate = 2 / 1) is 150g / t, of which 100g / t is selected in the first stage and 50g / t is selected in the second stage.

[0020] In the slurry, triethylenetetramine can react with Zn micro-dissolved from the surface of the hemimorphite. 2+ Strong complexation occurs to modify the surface of heterodyne, thereby improving the sulfidation flotation effect of heterodyne.

[0021] The surface cleaning and activation of this invention: the complexation reaction locally dissolves the silicon-oxygen species covering the zinc site surface, exposing more fresh zinc active sites and increasing the density of surface reaction sites; the complex formed by triethylenetetramine and surface zinc ions increases the local concentration of zinc on the mineral surface, which is conducive to the formation of a denser and more continuous ZnS film, laying the foundation for subsequent xanthate adsorption.

[0022] The technical solution of the present invention achieves beneficial effects and significant progress.

[0023] This invention utilizes a specific technical feature: a sequential process of triethylenetetramine surface modification—sulfurization—activation—collection and flotation, ensuring a continuous interaction between each treatment step. First, triethylenetetramine is introduced after slurry preparation to pretreat the mineral surface, ensuring the mineral particles are in a favorable state for subsequent reactions before entering the sulfurization stage. This step alters the initial conditions of traditional direct sulfurization, making the sulfurization reaction no longer entirely dependent on the original surface characteristics of the mineral. Subsequently, sulfurization is performed on this surface condition, concentrating the sulfurizing agent's action on the target mineral surface and improving reaction consistency. Further activation enhances the reactivity of the sulfurized surface, creating a continuous connection with the collector's action. This allows the collection stage to achieve synergistic enhancement based on the preceding treatments, rather than relying on a single agent. Finally, under the combined action of the collector and frother, mineral particles more easily attach bubbles and enter the foam product.

[0024] The aforementioned technical features do not exist in isolation, but rather form a continuous chain of action through sequential constraints: surface modification, reaction enhancement, interface activation, and selective collection. This transforms the flotation process from single-point enhancement to multi-stage synergistic control, maintaining stable separation performance under complex slurry conditions.

[0025] Existing flotation technologies for heterodynes typically follow a direct sulfidation-activation-collection process. This approach relies heavily on the single-stage action of the sulfiding and activating agents, lacking pre-control over the initial surface state of the minerals. This results in subsequent reactions being significantly affected by fluctuations in ore properties, making it difficult to maintain stable performance under different ore sample conditions. This invention departs from this existing path, introducing a triethylenetetramine surface modification step before sulfidation. This alters the reaction starting point and, through sequential constraints, establishes a close coupling between this step and subsequent sulfidation, activation, and collection. This process transforms from single-stage enhancement to multi-stage continuous control, introducing a new dimension of action in the technical logic: influencing the behavior of subsequent multi-stage reactions through pre-treatment of the surface.

[0026] Existing technologies lack clear technical insights into placing the treatment of this type of organic amine before sulfidation and establishing a synergistic relationship with subsequent processes. Even with conventional experimental capabilities, it is difficult to directly deduce this sequence and its overall synergistic effect. This proposed scheme not only changes the processing flow structure but also reconstructs the interaction relationships between various agents. The resulting continuous synergistic effect has unpredictable outcomes, demonstrating substantial characteristics and significant progress.

[0027] The technology of this invention only requires adding a reagent addition and stirring step before the existing sulfidation-xanthate process, without changing the main equipment, making it easy to promote in industry. After conversion, this technical solution can improve the recovery efficiency of zinc resources, resource utilization rate, and socio-economic benefits. Attached Figure Description

[0028] Figure 1 This is a flowchart of a method for promoting the sulfidation flotation of heterodyne using triethylenetetramine (TETA) according to an embodiment of the present invention;

[0029] Figure 2 This is a flowchart of pure mineral flotation provided in Embodiment 1 of the present invention;

[0030] Figure 3 This is a flowchart of pure mineral flotation provided in Embodiment 2 of the present invention;

[0031] Figure 4 This is a flowchart of pure mineral flotation provided in Embodiment 3 of the present invention;

[0032] Figure 5 This is a flowchart of the actual ore flotation process (one roughing, two scavenging, and two cleaning processes) provided in Embodiment 4 of the present invention.

[0033] Figure 6 This is a schematic diagram illustrating the effect of isoamyl xanthate concentration on the recovery rate of heteroaluminum ore provided in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram illustrating the effect of Na2S concentration on the recovery rate of heterodyne ore, provided in an embodiment of the present invention.

[0035] Figure 8 The Cu provided in the embodiments of the present invention 2+ Schematic diagram of the effect of concentration on the recovery rate of heteromorphic ore;

[0036] Figure 9 This is a schematic diagram illustrating the effect of triethylenetetramine concentration on the recovery rate of heterodyne, provided in an embodiment of the present invention. Detailed Implementation

[0037] 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.

[0038] like Figure 1 As shown in the embodiment of the present invention, the method for promoting the sulfidation flotation of heterodyne using triethylenetetramine includes the following steps:

[0039] S101, after crushing and grinding the raw or mixed ore sample of heteromorphic ore to be processed, add water to make slurry and stir;

[0040] S102, add triethylenetetramine solution to the slurry obtained in S101 and stir to carry out surface modification;

[0041] S103: Add a sulfiding agent to the slurry treated by S102, stir to carry out the sulfidation reaction, add an activator to the sulfidated slurry, and stir to activate it.

[0042] S104: Collector and frother are added to the slurry activated by S103, and then aerated flotation is performed to obtain heterodyne concentrate.

[0043] To achieve the above objectives, the method for promoting the sulfidation flotation of heterodyne using triethylenetetramine provided in this embodiment of the invention specifically includes the following steps:

[0044] The slurry described in S101 has a mass concentration of 5% to 35% and a conditioning time of 1 minute; the grinding fineness is such that the particle size of -0.074 mm accounts for more than 85%.

[0045] The surface modification stirring time for triethylenetetramine in S102 is 3 minutes.

[0046] The sulfiding agent described in S103 is sodium sulfide nonahydrate (Na2S·9H2O), and the sulfidation reaction stirring time is 5 minutes. The activating agent is copper sulfate pentahydrate (CuSO4·5H2O), and the activation reaction stirring time is 3 minutes.

[0047] The collector described in S104 is sodium isoamyl xanthate (NaIX), and the reaction is stirred for 3 minutes; the frother is No. 2 oil, and the stirring time is 1 minute; the concentrate is obtained by aeration flotation for 5 minutes.

[0048] Example 1

[0049] like Figure 2 As shown, weigh 2.00 g of pure isomorphous mineral (-200~+400 mesh) and place it in a 40 mL micro flotation cell. Add 40 mL of deionized water and adjust the slurry for 1 minute at a stirring speed of 1600 rpm. Add the following directly in sequence:

[0050] Sodium sulfide (Na₂S·9H₂O) solution was used to make the concentration in the slurry 8.0 × 10⁻⁶. -4 mol / L, stir for 5 minutes;

[0051] A copper sulfate (CuSO4·5H2O) solution was prepared to a concentration of 5.0 × 10⁻⁶. -4 mol / L, stir for 3 minutes;

[0052] Sodium isoamyl xanthate (NaIX) solution, to a concentration of 5.0 × 10⁻⁶. -4 mol / L, stir for 3 minutes;

[0053] #2 oil foaming agent, add 2 microliters, stir for 1 minute;

[0054] Following flotation for 5 minutes with aeration, the concentrate and tailings were collected, dried, and weighed separately. The flotation recovery rate of the heterodyne was calculated to be 52.31%.

[0055] Example 2

[0056] like Figure 3 As shown, the experimental procedures are basically the same as in Example 1, except that a pretreatment step is added before adding sodium sulfide (e.g., ...). Figure 3 (As shown): After 1 minute of slurry preparation, add triethylenetetramine aqueous solution to achieve a concentration of 4 × 10⁻⁶ in the slurry. -4 mol / L, stir for 3 minutes, and then proceed with the subsequent sulfidation, activation, collection and flotation steps in sequence.

[0057] After flotation, the flotation recovery rate of the heterodyne was calculated to be 85.54%. Compared with Case 1, the addition of triethylenetetramine significantly improved the floatability of the mineral.

[0058] Example 3

[0059] like Figure 4 As shown, sodium sulfide is added first, followed by triethylenetetramine: After slurry preparation for 1 min, sodium sulfide (8.0 × 10⁻⁶) is added first. -4 Stir for 5 min with mol / L, then add triethylenetetramine (4.0 × 10⁻⁶ mol / L). -4 The solution was stirred for 3 min with a concentration of mol / L, then copper sulfate, sodium isoamyl xanthate, and No. 2 oil were added sequentially for flotation. The flotation recovery rate was 59.43%.

[0060] This indicates that pre-activation of the mineral surface is necessary to achieve its promoting effect, rather than simply mixing or changing the order of the agents.

[0061] Example 4

[0062] A sample of a zinc oxide ore was taken, with a zinc content of 6.43%, anisocyanate of 46.76%, and an oxidation rate of 81.03%. The ore was crushed and ground to a particle size of -0.074 mm (85%), and the pulp concentration was adjusted to 35%. A flotation process consisting of one rougher, two scavengers, and two cleaners was adopted (e.g.,...). Figure 5 (As shown), the specific steps are as follows:

[0063] (1) Coarse selection operation

[0064] The following ingredients were added sequentially to the slurry: 1200 g / t sodium carbonate (pH adjuster), 600 g / t triethylenetetramine (stirring for 3 min), 600 g / t sodium humate / sodium hexametaphosphate (mass ratio 2 / 1) inhibitor, 1200 g / t sodium sulfide (stirring for 5 min), 500 g / t copper sulfate (activator) (stirring for 3 min), 500 g / t sodium isoamyl xanthate (collector) (stirring for 3 min), and 60 g / t No. 2 oil (stirring for 1 min). Aerated flotation was then performed to obtain rougher concentrate and rougher tailings.

[0065] (2) One-time sweeping operation

[0066] The following ingredients are added sequentially to the roughing tailings: 500 g / t sodium carbonate, 300 g / t triethylenetetramine, 200 g / t inhibitor (sodium humate / sodium hexametaphosphate = 2 / 1), 600 g / t sodium sulfide, 200 g / t copper sulfate, 200 g / t sodium isoamyl xanthate, and 30 g / t No. 2 oil. A single scavenging process is then performed to obtain a primary scavenging concentrate and a primary scavenging tailings.

[0067] (3) Secondary scanning operation

[0068] The following components are added sequentially to the tailings from the primary scavenging process: sodium carbonate 200 g / t, triethylenetetramine 150 g / t, inhibitor (sodium humate / sodium hexametaphosphate = 2 / 1) 100 g / t, sodium sulfide 300 g / t, copper sulfate 50 g / t, and sodium isoamyl xanthate 100 g / t. A secondary scavenging process is then performed to obtain a secondary scavenging concentrate and tailings. The secondary scavenging concentrate is returned to the pulp conditioning process and then fed into the primary scavenging process.

[0069] (4) Selected assignments

[0070] The rougher concentrate undergoes two cleaning stages: Stage 1: 100 g / t of inhibitor (sodium humate / sodium hexametaphosphate = 2 / 1) is added to obtain a primary cleaner concentrate and primary cleaner tailings. The primary cleaner tailings are combined with the primary scavenging concentrate and returned to the rougher stage. Stage 2: 50 g / t of inhibitor is added to the primary cleaner concentrate to obtain a secondary cleaner concentrate and secondary cleaner tailings. The secondary cleaner tailings are returned to the primary cleaner stage.

[0071] The final zinc concentrate grade was 38.19%, and the zinc recovery rate was 82.41%.

[0072] The embodiments of the present invention have achieved some positive results during the research and development or use process, and the following content describes them in conjunction with the data, charts and other information of the test process.

[0073] like Figure 6 As shown, isoamyl xanthate was used as a collector to recover hemimorphite. The recovery rate of hemimorphite gradually increased with increasing isoamyl xanthate concentration. When the isoamyl xanthate concentration reached 5.0 × 10⁻⁶, the recovery rate of hemimorphite increased. -4 At a concentration of 1 mol / L, the recovery rate of hemimorphite reached 22.59%. Further increasing the concentration resulted in a plateauing recovery rate; therefore, a collector concentration of 5.0 × 10⁻⁶ was selected. -4 mol / L.

[0074] like Figure 7 As shown, Na₂S was used as the sulfiding agent for hemimorphite (isoamyl xanthate concentration 5.0 × 10⁻⁶). -4 (mol / L), with increasing Na2S concentration, the recovery of hemimorphite initially increases gradually and then decreases. When the Na2S concentration reaches 8.0 × 10⁻⁶ mol / L, the recovery rate of hemimorphite decreases. -4 At a concentration of 1 mol / L, the recovery rate of hemimorphite reached its highest level of 34.48%. Further increasing the concentration would decrease the recovery rate; therefore, a Na₂S concentration of 8.0 × 10⁻⁶ was selected. -4 mol / L.

[0075] like Figure 8 As shown, CuSO4 was used as the activator for hemimorphite (isoamyl xanthate concentration 5.0 × 10⁻⁶). -4 mol / L, Na₂S concentration 8.0 × 10⁻⁶ -4The recovery rate of hemimorphite gradually increased with increasing CuSO4 concentration (mol / L). When the CuSO4 concentration reached 5.0 × 10⁻⁶ mol / L... -4 At a concentration of 1 mol / L, the recovery rate of hemimorphite reached 52.31%. Further increasing the concentration resulted in a plateauing recovery rate; therefore, a CuSO4 concentration of 5.0 × 10⁻⁶ was selected. -4 mol / L.

[0076] like Figure 9 As shown, triethylenetetramine was used to enhance the surface of sulfide hemimorphite (isoamyl xanthate concentration 5.0 × 10⁻⁶). -4 mol / L, Na₂S concentration 8.0 × 10⁻⁶ -4 mol / L, CuSO4 concentration 5.0 × 10⁻⁶ -4 The recovery of hemimorphite gradually increased with increasing triethylenetetramine concentration (mol / L). When the triethylenetetramine concentration reached 4.0 × 10⁻⁶ mol / L, the recovery rate was highest. -4 At a concentration of 1 mol / L, the recovery rate of hemimorphite reached 85.54%. Further increasing the concentration resulted in a plateauing recovery rate; therefore, a triethylenetetramine concentration of 4.0 × 10⁻⁶ was selected. -4 mol / L.

[0077] 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 the sulfidation flotation of heterodyne using triethylenetetramine, characterized in that, Includes the following steps: Step 1: Mix the crushed and ground raw or pure mineral of the heteromorphic ore with water and stir to form a uniform slurry; Step 2: Add triethylenetetramine solution to the slurry obtained in Step 1 and continue stirring to carry out the surface modification reaction; Step 3: Add sulfiding agent to the slurry modified in Step 2, stir to complete the sulfidation reaction, then add activator and stir to complete the activation reaction; Step four: Add collectors and frothers to the slurry activated in step three, perform aeration flotation, collect the froth product as heterodyne concentrate, and the product in the tank is tailings.

2. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 1, characterized in that, In step one, the raw heteromorphic ore is crushed and ground, and the proportion of -0.074mm particle size is ≥85%; the mass concentration of the slurry is 5%-35%, and the slurry mixing time is 1-3 minutes.

3. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 1, characterized in that, In step two, the concentration of triethylenetetramine in the slurry is 4.0 × 10⁻⁶. -4 mol / L; the stirring time for the surface modification reaction is 3 min.

4. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 1, characterized in that, In step three, the sulfiding agent is sodium sulfide nonahydrate (Na2S·9H2O), and its concentration in the slurry is 8.0 × 10⁻⁶. -4 mol / L; the stirring time for the sulfidation reaction is 5 min.

5. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 1, characterized in that, In step three, the activator is copper sulfate pentahydrate (CuSO4·5H2O), and its concentration in the slurry is 5.0 × 10⁻⁶. -4 mol / L; the stirring time for the activation reaction is 3 min.

6. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 1, characterized in that, In step four, the collector is a xanthate-based collector with a concentration of 5.0 × 10⁻⁶ in the slurry. -4 The concentration of the collector was mol / L, and the stirring time after adding the collector was 3 min.

7. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 1, characterized in that, In step four, the foaming agent is No. 2 oil, the amount added in the pure mineral test is 2 μL, and the stirring time after adding the foaming agent is 1 min; the time for aeration flotation is 5 min.

8. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 1, characterized in that, For actual ore flotation, a closed-circuit process of one rougher, two scavengers, and two cleaners is adopted, and triethylenetetramine is added in the rougher, primary scavenger and secondary scavenger operations.

9. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 7, characterized in that, The dosage of reagents for each operation, calculated based on the mass of the raw ore, is as follows: Roughing process: Sodium carbonate 1200g / t, triethylenetetramine 600g / t, inhibitor 600g / t, sodium sulfide 1200g / t, activator 500g / t, collector 500g / t, No. 2 oil 60g / t; One-time scavenging operation: Sodium carbonate 500g / t, triethylenetetramine 300g / t, inhibitor 200g / t, sodium sulfide 600g / t, activator 200g / t, collector 200g / t, No. 2 oil 30g / t; Secondary scavenging operation: Sodium carbonate 200g / t, triethylenetetramine 150g / t, inhibitor 100g / t, sodium sulfide 300g / t, activator 50g / t, collector 100g / t; Selected work: Total inhibitor dosage is 150g / t, of which 100g / t is selected from the first stage and 50g / t is selected from the second stage.

10. The method for promoting the sulfidation flotation of heterodyne using triethylenetetramine according to claim 9, characterized in that, The inhibitor is a compound of sodium humate and sodium hexametaphosphate, with a mass ratio of 2:1.

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