Process for the preparation of an arsenic-sand combination inhibitor

Abstract

The present application relates to the technical field of preparation of ore-dressing reagent, in particular to a preparation method of arsenopyrite combined inhibitor; in the present application, the three-dimensional network structure formed by gallic tannic acid on the surface of porous adsorption base material and in the internal pore structure thereof can effectively envelop and fix the synergistic inhibitor adsorbed on the surface of the porous adsorption base material and in the internal porous structure thereof, so that the finally prepared arsenopyrite combined inhibitor has good arsenic inhibition effect under the synergistic cooperation of gallic tannic acid and the synergistic inhibitor. Furthermore, under the mutual synergistic cooperation of aniline black and naphthol blue black, the arsenic inhibition effect thereof is effectively improved; the arsenopyrite combined inhibitor prepared by using the present application is used for flotation separation of sulfararsenide minerals, so that the quality and grade of the obtained minerals after flotation separation are ensured, and the comprehensive utilization of mineral resources is improved. In addition, the porous adsorption base material prepared by using the present application has certain magnetism, so that it is convenient for subsequent recovery, and is relatively energy-saving and environment-friendly.

Description

Technical Field

[0001] This invention relates to the field of mineral processing reagent preparation technology, specifically a method for preparing a combined inhibitor of arsenopyrite. Background Technology

[0002] The flotation separation of sulfide and arsenic minerals mainly involves the flotation separation of pyrite and arsenopyrite. Because the floatability of arsenopyrite and pyrite is extremely similar, arsenic is often associated with sulfide ores in sulfide ore beneficiation, making sulfur-arsenic separation difficult. The arsenic content directly affects the quality of the sulfide concentrate, making arsenic reduction in the concentrate an essential measure for beneficiation plants. In some sulfur-arsenic separation plants, the arsenic content in the flotation concentrate is generally around 1%. Therefore, effective flotation separation of pyrite and arsenopyrite not only improves the economic efficiency of the beneficiation plant but also has certain theoretical and practical significance. Furthermore, almost all arsenopyrite in sulfide-gold deposits contains invisible gold. Therefore, effectively recovering gold minerals from arsenopyrite while separating arsenic and sulfur is also an important aspect of comprehensive resource recovery and utilization. Based on this situation, this invention provides a method for preparing a combined arsenopyrite inhibitor to solve this technical problem. Summary of the Invention

[0003] The purpose of this invention is to provide a method for preparing a combined arsenopyrite inhibitor. Using this method for flotation separation of arsenic and sulfur minerals not only ensures the quality and grade of the minerals obtained after flotation separation but also improves the comprehensive utilization of mineral resources. Furthermore, the porous adsorption substrate prepared by this invention possesses a certain degree of magnetism, facilitating subsequent recovery and is relatively energy-efficient and environmentally friendly.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A method for preparing a strychnine combination inhibitor includes the following steps: a porous adsorption substrate is uniformly dispersed in a mixed solution at a solid-liquid ratio of 0.02–0.05 g / mL; then 3-glycidylpropoxytrimethoxysilane, with a mass of 0.4–0.6 times that of the porous adsorption substrate, is added; the mixture is stirred evenly and then stirred at 50–65°C for 2–3 h; after the reaction is complete, the pH of the resulting product is adjusted to 10.8–11.5; then gallic tannic acid and trihydroxyethylamine are added; the mixture is stirred and dispersed evenly and then kept at 60–70°C for 10–15 h; after the reaction is complete, the reaction product is filtered, washed, and dried sequentially to obtain the strychnine combination inhibitor product.

[0006] Furthermore, the method for preparing the porous adsorption substrate includes the following steps:

[0007] I. Mix magnetite, binder, pore-forming agent and water in a mass ratio of 1:0.2~0.4:0.02~0.04:8~12 until homogeneous. The resulting mixture is then extruded and molded into compound solid granules.

[0008] II. Mix kaolin with 3-5% (by weight) of a pore-forming agent until homogeneous. Then add 15-25% (by weight) of water to the resulting solid mixture and mix thoroughly. Wrap 0.6-1.2 times the mass of the compounded solid particles with the resulting slurry and dry at 80-100°C for 3-5 hours. After drying, place it in a reducing atmosphere and sinter at 850-950°C for 2-3 hours. After sintering, allow it to cool naturally to room temperature. The final product is the porous adsorption substrate.

[0009] Furthermore, the adhesive is selected as polyacrylamide, and its molecular weight is 12 million to 18 million.

[0010] Furthermore, the pore-forming agent is selected from any one of urea, starch, and thiourea.

[0011] Furthermore, the mixed solution is prepared by ultrasonic dissolution of an aqueous ethanol solution with a concentration of 40-60% and a synergistic inhibitor with a mass of 5-8%.

[0012] Furthermore, the preparation method of the synergistic inhibitor includes the following steps:

[0013] Step 1: Add 1,2-xylene to a sulfuric acid aqueous solution with a volume concentration of 20-25% at a dosage ratio of 0.03-0.08 g / mL. Heat the solution to dissolve the 1,2-xylene and allow it to cool naturally to 15-20°C. Then, slowly add a sodium sulfate aqueous solution with a volume of 10-20% sulfuric acid aqueous solution and a concentration of 10-15 wt%. The resulting mixture is called the first mixed component.

[0014] Step 2: Add anilin black to a 1.0-1.5 mol / L potassium hydroxide aqueous solution at a dosage ratio of 0.06-0.1 g / mL. After mixing and stirring evenly, allow the solution to cool naturally to 15-20°C. Mix the resulting second mixture with the first mixture at a volume ratio of 1-2:1. Adjust the pH to 10.6-11 and react for 3-5 hours. React the resulting reaction product with naphthol blue black at a pH of 10.3-10.8 for 5-8 hours. After the reaction is complete, perform solid-liquid separation and vacuum drying on the resulting product components. The final product is the synergistic inhibitor.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this invention, a first mixed component is prepared using 1,2-xylene, sulfuric acid aqueous solution, and sodium sulfate aqueous solution as raw materials; a second mixed component is prepared using anilin black and potassium hydroxide aqueous solution as raw materials. The first and second mixed components are mixed and stirred evenly to allow them to undergo a chemical reaction. The resulting reaction product then reacts chemically with naphthol blue black to ultimately prepare a synergistic inhibitor. The synergistic effect of anilin black and naphthol blue black effectively enhances its inhibitory effect on arsenic, ensuring the quality and grade of the minerals obtained after the flotation separation of sulfur and arsenic minerals.

[0017] 2. This invention uses magnetite, kaolin, polyacrylamide, and pore-forming agents as raw materials to prepare a porous adsorption substrate with magnetic properties. The porous adsorption substrate is then uniformly dispersed in a mixed solution containing a synergistic inhibitor, allowing the water-soluble synergistic inhibitor to be fully dispersed and adsorbed on the surface and within the porous structure of the substrate. Then, 3-glycidylpropoxytrimethoxysilane is added, reacting with relevant groups on the surface of the substrate. Ultimately, 3-glycidylpropoxytrimethoxysilane is effectively grafted onto the surface of the substrate through chemical bonds. Gallic tannic acid and trihydroxyethylamine are then added, allowing gallic tannic acid to be effectively grafted onto the surface and the inner walls of the porous structure of the substrate. Simultaneously, the three-dimensional network structure formed by gallic tannic acid on the surface and within the pores of the substrate effectively encapsulates and immobilizes the synergistic inhibitor adsorbed on the surface and within the porous structure, resulting in a well-developed arsenopyrite-containing combination inhibitor with good arsenic inhibition effect through the synergistic effect of gallic tannic acid and the synergistic inhibitor. The arsenopyrite-based combined inhibitor prepared according to this invention is used for flotation separation of arsenic-sulfur minerals, which not only ensures the quality and grade of the minerals obtained after flotation separation, but also improves the comprehensive utilization of mineral resources. Furthermore, the porous adsorption substrate prepared according to this invention has a certain degree of magnetism, facilitating its subsequent recovery and is relatively energy-efficient and environmentally friendly. Attached Figure Description

[0018] Figure 1 The process flow diagrams for the flotation separation of sulfur and arsenic minerals in Examples 1-5 are shown. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0020] A method for preparing a strychnine combination inhibitor includes the following steps: a porous adsorption substrate is uniformly dispersed in a mixed solution at a solid-liquid ratio of 0.02 g / mL; then, 3-glycidylpropoxytrimethoxysilane with a mass of 0.4 times that of the porous adsorption substrate is added; the mixture is stirred evenly and reacted at 50°C for 2 hours; after the reaction is complete, the pH of the resulting product is adjusted to 10.8; then, gallic tannic acid and trihydroxyethylamine are added; the mixture is stirred evenly and reacted at 60°C for 10 hours; after the reaction is complete, the reaction product is filtered, washed, and dried sequentially to obtain the strychnine combination inhibitor product; wherein, the mixed solution is prepared by ultrasonic dissolution of a 40% ethanol aqueous solution and a synergistic inhibitor with a mass of 5% of the solution.

[0021] The preparation method of porous adsorption substrate includes the following steps:

[0022] I. Mix magnetite, polyacrylamide with a molecular weight of 12 million, urea and water in a mass ratio of 1:0.2:0.02:8 until homogeneous. The resulting mixture is then extruded and molded into compound solid granules.

[0023] II. Mix kaolin with 3% urea by mass until homogeneous. Then add 15% water by mass to the resulting solid mixture and mix until homogeneous. Wrap the resulting slurry with 0.6 times the mass of the compounded solid particles and dry at 80°C for 3 hours. After drying, place it in a reducing atmosphere and sinter at 850°C for 2 hours. After sintering, allow it to cool naturally to room temperature. The final product is the porous adsorption substrate.

[0024] The preparation method of the synergistic inhibitor includes the following steps:

[0025] Step 1: Add 1,2-xylene to a 20% sulfuric acid aqueous solution at a dosage ratio of 0.03 g / mL. Heat the solution to dissolve the 1,2-xylene and allow it to cool naturally to 15°C. Then, slowly add a 10% sodium sulfate aqueous solution (10 wt%) to the solution. The resulting mixture is called the first mixed component.

[0026] Step 2: Add anilin black to a 1.0 mol / L potassium hydroxide aqueous solution at a dosage ratio of 0.06 g / mL, mix and stir evenly, and then allow the temperature to cool naturally to 15°C. Mix the resulting second mixed component with the first mixed component in equal volumes, adjust the pH to 10.6, and react for 3 hours. The resulting reaction product reacts with naphthol blue black at a pH of 10.3 for 5 hours. After the reaction is complete, the resulting product components are subjected to solid-liquid separation and vacuum drying in sequence. The final product is the synergistic inhibitor. Example

[0027] A method for preparing a strychnine combination inhibitor includes the following steps: a porous adsorption substrate is uniformly dispersed in a mixed solution at a solid-liquid ratio of 0.03 g / mL; then, 3-glycidylpropoxytrimethoxysilane, with a mass of 0.5 times that of the porous adsorption substrate, is added; the mixture is stirred evenly and reacted at 60°C for 3 hours; after the reaction is complete, the pH of the resulting product is adjusted to 11.0; then, gallic tannic acid and trihydroxyethylamine are added; the mixture is stirred and dispersed evenly and reacted at 65°C for 12 hours; after the reaction is complete, the reaction product is filtered, washed, and dried sequentially to obtain the strychnine combination inhibitor product; wherein, the mixed solution is prepared by ultrasonic dissolution of a 50% ethanol aqueous solution and a synergistic inhibitor with a mass of 6% of the solution.

[0028] The preparation method of porous adsorption substrate includes the following steps:

[0029] I. Mix magnetite, polyacrylamide with a molecular weight of 15 million, starch and water in a mass ratio of 1:0.3:0.03:10 until homogeneous. The resulting mixture is then extruded and molded into compound solid granules.

[0030] II. Mix kaolin with 4% starch by mass until homogeneous. Then add 20% water by mass to the resulting solid mixture and mix until homogeneous. Wrap 0.8 times the mass of the compounded solid particles with the resulting slurry and dry at 90°C for 4 hours. After drying, place it in a reducing atmosphere and sinter at 900°C for 3 hours. After sintering, allow it to cool naturally to room temperature. The final product is the porous adsorption substrate.

[0031] The preparation method of the synergistic inhibitor includes the following steps:

[0032] Step 1: Add 1,2-xylene to a 25% sulfuric acid aqueous solution at a dosage ratio of 0.05 g / mL. Heat the solution to dissolve the 1,2-xylene and allow it to cool naturally to 20°C. Then, slowly add a 15% (v / v) sodium sulfate aqueous solution and a 15 wt% (v / v) sodium sulfate aqueous solution. The resulting mixture is called the first mixed component.

[0033] Step 2: Add anilin black to a 1.2 mol / L potassium hydroxide aqueous solution at a dosage ratio of 0.08 g / mL, mix and stir evenly, and then allow the solution to cool naturally to 20°C. Mix the resulting second mixture with the first mixture at a volume ratio of 1.5:1, adjust the pH to 10.8, and react for 4 hours. React the resulting reaction product with naphthol blue black at pH 10.5 for 6 hours. After the reaction is complete, perform solid-liquid separation and vacuum drying on the resulting product components in sequence. The final product is the synergistic inhibitor. Example

[0034] A method for preparing a strychnine combination inhibitor includes the following steps: a porous adsorption substrate is uniformly dispersed in a mixed solution at a solid-liquid ratio of 0.05 g / mL; then, 3-glycidylpropoxytrimethoxysilane, with a mass of 0.6 times that of the porous adsorption substrate, is added; the mixture is stirred evenly and then stirred at 65°C for 3 h; after the reaction is complete, the pH of the resulting product is adjusted to 11.5; then, gallic tannic acid and trihydroxyethylamine are added; the mixture is stirred and dispersed evenly and then kept at 70°C for 15 h; after the reaction is complete, the reaction product is filtered, washed, and dried sequentially to obtain the strychnine combination inhibitor product; wherein, the mixed solution is prepared by ultrasonic dissolution of a 60% ethanol aqueous solution and 8% by mass of a synergistic inhibitor.

[0035] The preparation method of porous adsorption substrate includes the following steps:

[0036] I. Mix magnetite, polyacrylamide with a molecular weight of 18 million, thiourea and water in a mass ratio of 1:0.4:0.04:12 until homogeneous. The resulting mixture is then extruded and molded into compound solid granules.

[0037] II. Mix kaolin with 5% (by mass) thiourea until homogeneous. Then add 25% (by mass) water to the resulting solid mixture and mix until homogeneous. Wrap 1.2 times the mass of the compounded solid particles with the resulting slurry and dry at 100°C for 5 hours. After drying, place it in a reducing atmosphere and sinter at 950°C for 3 hours. After sintering, allow it to cool naturally to room temperature. The final product is the porous adsorption substrate.

[0038] The preparation method of the synergistic inhibitor includes the following steps:

[0039] Step 1: Add 1,2-xylene to a 25% sulfuric acid aqueous solution at a dosage ratio of 0.08 g / mL. Heat the solution to dissolve the 1,2-xylene and allow it to cool naturally to 15-20°C. Then, slowly add a 15 wt% sodium sulfate aqueous solution at a volume of 20% of the sulfuric acid aqueous solution. The resulting mixture is called the first mixed component.

[0040] Step 2: Add anilin black to a 1.5 mol / L potassium hydroxide aqueous solution at a dosage ratio of 0.1 g / mL, mix and stir evenly, and then allow the temperature to cool naturally to 20°C. Mix the resulting second mixed component with the first mixed component at a volume ratio of 2:1, adjust the pH to 11, and react for 5 hours. React the resulting reaction product with naphthol blue black at a pH of 10.8 for 8 hours. After the reaction is complete, perform solid-liquid separation and vacuum drying on the resulting product components in sequence. The final product is the synergistic inhibitor.

[0041] This application example demonstrates the application of the arsenopyrite combination inhibitor prepared in Example 1 in the flotation separation of sulfur and arsenic minerals.

[0042] In a sulfur-gold-arsenic mine in Anhui, the sulfur-arsenic mixed concentrate after flotation and magnetic separation contained 44.31% sulfur and 2.11% arsenic. Process mineralogical analysis showed that the minerals mainly existed in the form of pyrite and arsenopyrite, with a small amount of pyrrhotite and calcium silicate gangue minerals.

[0043] The specific flotation separation process is as follows: the pH of the pulp is adjusted to 6.5~7.5 by ferrous sulfate; during the flotation process, in order to prevent fine gold particles from floating into the sulfur concentrate, the combined arsenopyrite inhibitor prepared in Example 1 is added to the sulfur-arsenic mixed concentrate at a dosage of 300g / t, and 30g / t of butyl xanthate is added as a collector for sulfur minerals for roughing separation. In the scavenging operation, 100g / t of the combined arsenopyrite inhibitor and 10g / t of butyl xanthate are added. After one roughing and one scavenging process, a sulfur concentrate with a sulfur content of 50.87% and an arsenic content of 0.255% was obtained, with a sulfur recovery rate of 63.51%. The flotation tailings were an arsenopyrite rough concentrate, which can be further separated into hexagonal pyrrhotite and gold-bearing arsenopyrite by strong magnetic separation to obtain an arsenopyrite concentrate and a strong magnetic concentrate. The arsenopyrite concentrate contains 7.46% arsenic and 5.46 g / t of gold. Mixing the sulfur concentrate and the strong magnetic concentrate yields a mixed sulfur concentrate with a sulfur content of 46.42% and a sulfur recovery rate of 86.45%. The experimental results show that the above reagent conditions can effectively separate sulfur and arsenic minerals to obtain sulfur concentrate and arsenopyrite concentrate.

[0044] This application example is another instance of the application of the arsenopyrite combination inhibitor prepared in Example 1 in the flotation separation of sulfur and arsenic minerals.

[0045] The raw material is a sulfur-arsenic mixed concentrate, containing 42.54% sulfur and 1.06% arsenic. Process mineralogy indicates that the minerals mainly exist in the form of pyrite and arsenopyrite, with a small amount of pyrrhotite and calcium silicate gangue minerals.

[0046] The specific flotation separation process is as follows: The pH of the pulp is adjusted to 6.5~8.0 by ferrous sulfate. The combined arsenopyrite inhibitor prepared in Example 1 is added to the sulfur-arsenic mixed concentrate at a dosage of 250g / t. Then, 30g / t of butyl xanthate is added as a collector for sulfur minerals for roughing separation. In the scavenging operation, 100g / t of the combined arsenopyrite inhibitor and 10g / t of butyl xanthate are added. After one roughing and one scavenging process, a sulfur concentrate with a sulfur content of 49.13%, an arsenic content of 0.440%, and a sulfur recovery rate of 62.98% was obtained. The flotation tailings were arsenopyrite rough concentrate. Subsequent high-intensity magnetic separation was used to separate hexagonal pyrrhotite and gold-bearing arsenopyrite, yielding arsenopyrite concentrate and a high-intensity magnetic concentrate. The arsenopyrite concentrate contained 7.31% arsenic and 7.32 g / t of gold. Mixing the sulfur concentrate and the high-intensity magnetic concentrate yielded a mixed sulfur concentrate with a sulfur content of 44.35% and a sulfur recovery rate of 93.78%. The experimental results demonstrate that the above reagent conditions can effectively separate sulfur and arsenic minerals, yielding sulfur concentrate and arsenopyrite concentrate.

[0047] This application example is a comparative example of application example 2, which uses sodium humate as an arsenopyrite inhibitor in the separation of sulfur and arsenic.

[0048] The specific flotation separation process is as follows: The pH of the slurry is adjusted to 6.5-8.0 using ferrous sulfate. Sodium humate is added to the sulfur-arsenic mixed concentrate at a dosage of 250 g / t, and 30 g / t of butyl xanthate is added as a collector for sulfur minerals for roughing separation. For scavenging, 100 g / t of sodium humate and 10 g / t of butyl xanthate are added. After one roughing and one scavenging operation, a sulfur concentrate with a sulfur content of 47.02%, an arsenic content of 0.625%, and a sulfur recovery rate of 66.36% is obtained. The flotation tailings are an arsenopyrite rough concentrate. Subsequently, hexagonal pyrrhotite and gold-bearing arsenopyrite are separated by strong magnetic separation to obtain an arsenopyrite concentrate and a strong magnetic concentrate. The arsenopyrite concentrate contains 7.02% arsenic and 6.95 g / t of gold. The sulfur concentrate and the strong magnetic concentrate are then mixed to obtain a mixed sulfur concentrate with a sulfur content of 43.12% and a sulfur recovery rate of 93.21%.

[0049] This application example demonstrates the application of the arsenopyrite combination inhibitor prepared in Example 2 in the flotation separation of sulfur and arsenic minerals.

[0050] In a sulfur-gold-arsenic mine in Shandong, the sulfur-arsenic mixed concentrate after flotation and magnetic separation contains 44.36% sulfur and 3.40% arsenic. Process mineralogical analysis shows that the minerals mainly exist in the form of pyrite and arsenopyrite, with a small amount of pyrrhotite and calcium silicate gangue minerals.

[0051] The specific flotation separation process is as follows: the pH of the pulp is adjusted to 6.0~6.5 by ferrous sulfate; during the flotation process, in order to prevent fine gold particles from floating into the sulfur concentrate, the combined arsenopyrite inhibitor prepared in Example 1 is added to the sulfur-arsenic mixed concentrate at a dosage of 200g / t, and 30g / t of butyl xanthate is added as a collector for sulfur minerals for roughing separation. In the scavenging operation, 100g / t of the combined arsenopyrite inhibitor and 10g / t of butyl xanthate are added. After one roughing and one scavenging process, a sulfur concentrate with a sulfur content of 49.21% and an arsenic content of 0.809% was obtained, with a sulfur recovery rate of 81.84%. The flotation tailings were an arsenopyrite rough concentrate, which can be further separated into hexagonal pyrrhotite and gold-bearing arsenopyrite by strong magnetic separation to obtain an arsenopyrite concentrate and a strong magnetic concentrate. The arsenopyrite concentrate contains 21.23% arsenic and 10.16 g / t of gold. Mixing the sulfur concentrate and the strong magnetic concentrate yields a mixed sulfur concentrate with a sulfur content of 47.11% and a sulfur recovery rate of 92.97%. The experimental results show that the above reagent conditions can effectively separate sulfur and arsenic minerals to obtain sulfur concentrate and arsenopyrite concentrate.

[0052] This application example demonstrates the application of the arsenopyrite combination inhibitor prepared in Example 3 in the flotation separation of sulfur and arsenic minerals.

[0053] In a sulfur-gold-arsenic mine in Tongling, Anhui Province, the sulfur-arsenic mixed concentrate after flotation and magnetic separation contains 42.55% sulfur and 1.06% arsenic. Process mineralogical analysis shows that the minerals mainly exist in the form of pyrite and arsenopyrite, with a small amount of pyrrhotite and calcium silicate gangue minerals.

[0054] The specific flotation separation process is as follows: the pH of the pulp is adjusted to 6.5~7.5 by ferrous sulfate; during the flotation process, in order to prevent fine gold particles from floating into the sulfur concentrate, the combined arsenopyrite inhibitor prepared in Example 1 is added to the sulfur-arsenic mixed concentrate at a dosage of 200g / t, and 30g / t of butyl xanthate is added as a collector for sulfur minerals for roughing separation. In the scavenging operation, 100g / t of the combined arsenopyrite inhibitor and 10g / t of butyl xanthate are added. After one roughing and one scavenging process, a sulfur concentrate with a sulfur content of 49.13% and an arsenic content of 0.440% was obtained, with a sulfur recovery rate of 62.94%. The flotation tailings were an arsenopyrite rough concentrate, which can be further separated into hexagonal pyrrhotite and gold-bearing arsenopyrite by strong magnetic separation to obtain an arsenopyrite concentrate and a strong magnetic concentrate. The arsenopyrite concentrate contains 7.31% arsenic and 7.32 g / t of gold. Mixing the sulfur concentrate and the strong magnetic concentrate yields a mixed sulfur concentrate with a sulfur content of 44.35% and a sulfur recovery rate of 93.55%. The experimental results show that the above reagent conditions can effectively separate sulfur and arsenic minerals to obtain sulfur concentrate and arsenopyrite concentrate.

[0055] By comparing and analyzing the relevant data in Application Examples 1-5, it can be seen that using the arsenopyrite combination inhibitor prepared in this invention for the flotation separation of sulfur and arsenic minerals not only ensures the quality and grade of the minerals obtained after flotation separation, but also improves the comprehensive utilization of mineral resources. Therefore, it is evident that the arsenopyrite combination inhibitor prepared in this invention has a broader market prospect and is more suitable for widespread application.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for preparing a combination inhibitor of arsenopyrite, characterized in that, Includes the following steps: The porous adsorption substrate was uniformly dispersed in the mixed solution at a solid-liquid ratio of 0.02–0.05 g / mL. Then, 3-glycidylpropoxytrimethoxysilane, with a mass of 0.4–0.6 times that of the porous adsorption substrate, was added. After mixing and stirring evenly, the mixture was stirred at 50–65°C for 2–3 h. After the reaction was completed, the pH of the resulting product was adjusted to 10.8–11.

5. Then, gallic tannic acid and trihydroxyethylamine were added, mixed and dispersed evenly, and the mixture was kept at 60–70°C for 10–15 h. After the reaction was completed, the reaction product was filtered, washed, and dried to obtain the arsenopyrite combination inhibitor product.

2. The method for preparing a styrax combination inhibitor according to claim 1, characterized in that, The method for preparing the porous adsorption substrate includes the following steps: I. Mix magnetite, binder, pore-forming agent and water in a mass ratio of 1:0.2~0.4:0.02~0.04:8~12 until homogeneous. The resulting mixture is then extruded and molded into compound solid granules. II. Mix kaolin with 3-5% (by weight) of a pore-forming agent until homogeneous. Then add 15-25% (by weight) of water to the resulting solid mixture and mix thoroughly. Wrap 0.6-1.2 times the mass of the compounded solid particles with the resulting slurry and dry at 80-100°C for 3-5 hours. After drying, place it in a reducing atmosphere and sinter at 850-950°C for 2-3 hours. After sintering, allow it to cool naturally to room temperature. The final product is the porous adsorption substrate.

3. The method for preparing a styrax combination inhibitor according to claim 2, characterized in that: The adhesive is polyacrylamide with a molecular weight of 12 million to 18 million.

4. The method for preparing a styrax combination inhibitor according to claim 2, characterized in that: The pore-forming agent is selected from any one of urea, starch, and thiourea.

5. The method for preparing a styrax combination inhibitor according to claim 1, characterized in that: The mixed solution is prepared by ultrasonic dissolution of an aqueous ethanol solution with a concentration of 40-60% and a synergistic inhibitor with a mass of 5-8%.

6. The method for preparing a styrax combination inhibitor according to claim 5, characterized in that, The preparation method of the synergistic inhibitor includes the following steps: Step 1: Add 1,2-xylene to a sulfuric acid aqueous solution with a volume concentration of 20-25% at a dosage ratio of 0.03-0.08 g / mL. Heat the solution to dissolve the 1,2-xylene and allow it to cool naturally to 15-20°C. Then, slowly add a sodium sulfate aqueous solution with a volume of 10-20% sulfuric acid aqueous solution and a concentration of 10-15 wt%. The resulting mixture is called the first mixed component. Step 2: Add anilin black to a 1.0-1.5 mol / L potassium hydroxide aqueous solution at a dosage ratio of 0.06-0.1 g / mL. After mixing and stirring evenly, allow the solution to cool naturally to 15-20°C. Mix the resulting second mixture with the first mixture at a volume ratio of 1-2:

1. Adjust the pH to 10.6-11 and react for 3-5 hours. React the resulting reaction product with naphthol blue black at a pH of 10.3-10.8 for 5-8 hours. After the reaction is complete, perform solid-liquid separation and vacuum drying on the resulting product components. The final product is the synergistic inhibitor.

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