A reverse flotation collector, a preparation method and application thereof

Abstract

The application provides a reverse flotation collector and a preparation method and application thereof. The reverse flotation collector of the application is compounded with a non-polar oil-fatty primary amine combined collector; the collector is mixed with the non-polar oil as an auxiliary collector to dissolve the fatty primary amine, the fatty primary amine is adsorbed on the non-polar oil water interface to reduce the interfacial tension through the emulsifying effect of the fatty primary amine, the selectivity to organic carbon is enhanced, and the content of black organic carbon is reduced. The application utilizes the emulsifying characteristics of the fatty primary amine to enhance the solubility of the single collector in water, thereby reducing the use cost of the collector; the application utilizes the electrostatic adsorption characteristics of the fatty primary amine and silicate to remove SiO2 impurities through reverse flotation; the application utilizes the compounded collector to fully exert the characteristics of the single collector, enhance the selectivity to the target mineral, and solve the problems of poor acid resistance of the reverse flotation reagent, low concentrate yield in the reverse flotation process, incomplete whitening and the like.

Description

Technical Field

[0001] This invention belongs to the field of solid waste treatment technology, and in particular relates to a reverse flotation collector, its preparation method and application. Background Technology

[0002] Phosphogypsum is an industrial byproduct of wet-process phosphoric acid production. It appears as a grayish-white or grayish-black powder, primarily composed of CaSO4·nH2O, accounting for over 85% of its composition. Other impurities include undecomposed phosphate rock powder, uncleaned phosphoric acid, iron and aluminum compounds, acid-insoluble substances, organic matter, phosphorus (P), phosphorus (F), and heavy metals. Current surveys indicate that my country's phosphogypsum stockpile exceeds 600 million tons, with an annual increase of approximately 80 million tons. Despite continuous increases, the utilization rate of existing stock remains low. The presence of impurities significantly hinders its resource utilization. Desilication, purification, and whitening of phosphogypsum through flotation is an excellent method for processing it. However, current research on flotation methods for phosphogypsum processing, both domestically and internationally, is still in its early stages. Research on flotation reagents is limited, with many methods drawing inspiration from coal slime separation and phosphate rock flotation. Consequently, the flotation process for phosphogypsum suffers from weak mineral specificity.

[0003] Existing technology discloses a whitening and impurity removal agent for phosphogypsum reverse flotation and its preparation. This reverse flotation collector is composed of tributyl phosphate, terpineol, fatty primary amine, and dimethyl tertiary amine. This collector exhibits good adaptability to strongly acidic environments, but the flotation process is relatively cumbersome, requiring two reverse and two forward flotation stages to achieve optimal results. Existing technology also discloses a collector for collecting siliceous minerals and its preparation method. The collector prepared by this method can effectively collect silicate minerals in phosphogypsum while removing a certain amount of organic carbon. However, this collector contains many components and its preparation is complex. When used in the phosphogypsum flotation process, it exhibits low efficiency in removing organic carbon and low whiteness.

[0004] Given the problems with existing collectors, it is necessary to improve them. Summary of the Invention

[0005] In view of this, the present invention provides an anti-flotation collector, its preparation method and application, to overcome the defects existing in the prior art.

[0006] In a first aspect, the present invention provides an anti-flotation collector comprising the following components: an aqueous solution of terpineol, a nonpolar oil, an aqueous solution of a fatty primary amine, and an aqueous solution of an alcohol.

[0007] The fatty primary amine in the aqueous solution is a fatty primary amine with a fatty alkyl carbon chain length of C12 to C18.

[0008] Preferably, the non-polar oil in the reverse flotation collector includes at least one of aviation kerosene, light diesel oil, and shale light diesel oil.

[0009] Preferably, in the reverse flotation collector, the primary fatty amine in the aqueous solution includes at least one of dodecylamine, tetradecylamine, hexadecylamine, and octadecylamine.

[0010] Preferably, in the reverse flotation collector, the mass fraction of the fatty primary amine in the aqueous solution is 4-6%.

[0011] Preferably, in the reverse flotation collector, the alcohol in the aqueous solution includes at least one of methanol, ethanol, and n-butanol;

[0012] The alcohol in the aqueous solution has a mass fraction of 5-10%.

[0013] Preferably, the reverse flotation collector comprises the following components by mass fraction: 5%–10% pine oil, 10%–20% non-polar oil, 30%–60% aqueous solution of fatty primary amine, and 20%–40% aqueous solution of alcohol.

[0014] Secondly, the present invention also provides a method for preparing the aforementioned anti-flotation collector, comprising the following steps:

[0015] An aqueous solution of a fatty primary amine, terpineol, and a nonpolar oil are mixed and added to an aqueous solution of alcohol. After stirring and sonication, a reverse flotation collector is obtained.

[0016] Preferably, the method for preparing the reverse flotation collector involves mixing an aqueous solution of a fatty primary amine, terpineol, and a non-polar oil, then adding the mixture to an aqueous solution of alcohol, stirring, and then sonicating at 40–50°C for 30–60 minutes to obtain the reverse flotation collector.

[0017] Thirdly, the present invention also provides an application of the reverse flotation collector described above or the reverse flotation collector prepared by the preparation method described above in the flotation of phosphogypsum.

[0018] Preferably, the application includes the following steps:

[0019] Water is added to phosphogypsum to prepare a slurry;

[0020] A reverse flotation collector is added to the slurry for reverse flotation.

[0021] The reverse flotation collector of this invention is a compound collector consisting of non-polar oil and aliphatic primary amines. This collector uses non-polar oil as an auxiliary collector to miscibly dissolve the aliphatic primary amines. Through the emulsification effect of the aliphatic primary amines, the amines adsorb at the oil-water interface of the non-polar oil, reducing interfacial tension, enhancing selectivity for organic carbon, and decreasing the content of black organic carbon. Furthermore, through the adsorption of silicates and some mineral slime by the aliphatic primary amines, the content of SiO2 is reduced, achieving desilication, decolorization, and purification of phosphogypsum. The flotation reagents of this invention have the following advantages over previous flotation reagents: By combining reverse flotation collectors, this invention utilizes the emulsifying properties of fatty primary amines to enhance the solubility of a single collector in water, thereby reducing collector costs and improving economic efficiency; this invention removes SiO2 impurities through reverse flotation by utilizing the electrostatic adsorption characteristics of fatty primary amines and silicates; this invention, through the compounding of collectors, fully leverages the characteristics of a single collector, enhances its selectivity for target minerals, and solves problems such as poor acid resistance of reverse flotation reagents, low concentrate yield during reverse flotation, and incomplete whitening. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

[0023] It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of embodiments. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single digits within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any referenced number (fraction or integer) within the indicated range.

[0024] This application provides an anti-flotation collector comprising the following components: an aqueous solution of terpineol, a non-polar oil, a fatty primary amine, and an aqueous solution of an alcohol.

[0025] Among them, the fatty primary amine in the aqueous solution is a fatty primary amine with a fatty alkyl carbon chain length of C12 to C18.

[0026] In some embodiments, the non-polar oil includes at least one of aviation kerosene, light diesel oil, and shale light diesel oil.

[0027] In some embodiments, the fatty primary amine in the aqueous solution includes at least one of dodecylamine, tetradecylamine, hexadecylamine, and octadecylamine.

[0028] In some embodiments, the alcohol in the aqueous solution includes at least one of methanol, ethanol, and n-butanol.

[0029] In some embodiments, the mass fraction of the fatty primary amine in the aqueous solution is 4-6%.

[0030] In some embodiments, the mass fraction of alcohol in the aqueous solution is 5-10%.

[0031] In some embodiments, the reverse flotation collector comprises the following components by mass fraction: 5%–10% pine oil, 10%–20% non-polar oil, 30%–60% aqueous solution of fatty primary amine, and 20%–40% aqueous solution of alcohol.

[0032] The reverse flotation collector of this invention is a compound collector consisting of non-polar oil and aliphatic primary amines. This collector uses non-polar oil as an auxiliary collector to miscibly dissolve the aliphatic primary amines. Through the emulsification effect of the aliphatic primary amines, the amines adsorb at the oil-water interface of the non-polar oil, reducing interfacial tension, enhancing selectivity for organic carbon, and decreasing the content of black organic carbon. Furthermore, through the adsorption of silicates and some mineral slime by the aliphatic primary amines, the SiO2 content is reduced, achieving desilication, decolorization, and purification of phosphogypsum. The flotation reagents of this invention have the following advantages over previous flotation reagents: By combining reverse flotation collectors, this invention utilizes the emulsifying properties of fatty primary amines to enhance the solubility of a single collector in water, thereby reducing collector costs and improving economic efficiency; this invention removes SiO2 impurities through reverse flotation by utilizing the electrostatic adsorption characteristics of fatty primary amines and silicates; this invention, through the compounding of collectors, fully leverages the characteristics of a single collector, enhances its selectivity for target minerals, and solves problems such as poor acid resistance of reverse flotation reagents, low concentrate yield during reverse flotation, and incomplete whitening.

[0033] Based on the same inventive concept, the present invention also provides a method for preparing the above-mentioned reverse flotation collector, comprising the following steps:

[0034] A fatty primary amine, terpineol, and non-polar oil are mixed and added to an aqueous solution of alcohol. After stirring and sonication, a reverse flotation collector is obtained.

[0035] In some embodiments, an aqueous solution of a fatty primary amine, terpineol, and a nonpolar oil are mixed and added to an aqueous solution of alcohol. After stirring, the mixture is ultrasonicated at a temperature of 40–50°C for 30–60 minutes to obtain a reverse flotation collector.

[0036] Based on the same inventive concept, the present invention also provides an application of the above-mentioned reverse flotation collector or the reverse flotation collector prepared by the above-mentioned preparation method in the flotation of phosphogypsum.

[0037] In some embodiments, the above application includes the following steps:

[0038] S1. Add water to phosphogypsum to prepare a slurry;

[0039] S2. Add reverse flotation collector to the slurry for reverse flotation;

[0040] S3. The concentrate obtained from reverse flotation is filtered and dried to obtain purified phosphogypsum.

[0041] In step S1, the mass concentration of the slurry is 20-40%.

[0042] The following detailed embodiments further illustrate the reverse flotation collector, its preparation method, and its application. This section further explains the invention in conjunction with specific embodiments, but should not be construed as limiting the invention. Unless otherwise specified, the techniques used in the embodiments are conventional methods well known to those skilled in the art. Unless otherwise specified, the reagents, methods, and equipment used in this invention are conventional reagents, methods, and equipment in the art.

[0043] Example 1

[0044] This application provides an anti-flotation collector comprising the following components by mass fraction: 10% pine oil, 20% aviation kerosene, 50% aqueous solution of dodecylamine, and 20% aqueous solution of n-butanol.

[0045] The aqueous solution of dodecylamine contains 5% dodecylamine by mass, and the aqueous solution of n-butanol contains 8% n-butanol by mass.

[0046] The preparation method of the above-mentioned reverse flotation collector includes the following steps:

[0047] A mixture of pine oil, aviation kerosene, and an aqueous solution of dodecylamine was added to an aqueous solution of n-butanol and ultrasonicated at 45°C for 40 minutes to obtain a reverse flotation collector.

[0048] Example 2

[0049] This application provides an anti-flotation collector comprising the following components by mass fraction: 10% pine oil, 20% light diesel oil, 50% aqueous solution of dodecylamine, and 20% aqueous solution of n-butanol.

[0050] The aqueous solution of dodecylamine contains 5% dodecylamine by mass, and the aqueous solution of n-butanol contains 8% n-butanol by mass.

[0051] The preparation method of the above-mentioned reverse flotation collector includes the following steps:

[0052] A mixture of pine oil, light diesel oil, and dodecylamine aqueous solution was added to an aqueous solution of n-butanol and ultrasonicated at 45°C for 40 minutes to obtain a reverse flotation collector.

[0053] Comparative Example 1

[0054] This comparative example provides a reverse flotation collector comprising the following components by mass fraction: 15% pine oil, 50% aqueous solution of dodecylamine, and 35% aqueous solution of n-butanol;

[0055] The aqueous solution of dodecylamine contains 5% dodecylamine by mass, and the aqueous solution of n-butanol contains 8% n-butanol by mass.

[0056] The preparation method of the above-mentioned reverse flotation collector includes the following steps:

[0057] A mixture of pine oil and dodecylamine aqueous solution was added to an aqueous solution of n-butanol and ultrasonicated at 45°C for 40 min to obtain a reverse flotation collector.

[0058] Comparative Example 2

[0059] This comparative example provides a reverse flotation collector comprising the following components by mass fraction: 20% pine oil, 20% light diesel oil, and 60% aqueous solution of dodecylamine;

[0060] The aqueous solution of dodecylamine contains 5% dodecylamine by mass.

[0061] The preparation method of the above-mentioned reverse flotation collector includes the following steps:

[0062] A reverse flotation collector was obtained by mixing pine alcohol oil, light diesel oil, and an aqueous solution of dodecylamine and then sonicating at 45°C for 40 minutes.

[0063] Comparative Example 3

[0064] This comparative example provides a reverse flotation collector comprising the following components by mass fraction: 20% pine oil and 80% aqueous solution of tetradecylamine;

[0065] The aqueous solution of tetradecylamine contains 5% tetradecylamine by mass.

[0066] The preparation method of the above-mentioned reverse flotation collector includes the following steps:

[0067] A reverse flotation collector was obtained by mixing pine oil and tetradecylamine aqueous solution and then sonicating at 45°C for 40 min.

[0068] Example 3

[0069] This embodiment 3 provides the application of a reverse flotation collector in the flotation of phosphogypsum. Specifically, it involves a desilication purification flotation process experiment on phosphogypsum from a certain location in Hubei Province. The phosphogypsum has a CaSO4·2H2O content (mass content) of 90.23%, a SiO2 content (mass content) of 5.45%, and a whiteness of 29.67%. The specific steps include:

[0070] S1. Weigh 150g of phosphogypsum and add it to water to prepare a slurry with a mass fraction of 30%.

[0071] S2. Add 100 μL of the reverse flotation collector from Example 1 to the slurry in S1. Adjust the slurry at a speed of 2000 r / min for 1 min without aeration, and then perform reverse flotation for 8 min.

[0072] S3. The concentrate obtained from flotation in step S2 is filtered and dried to obtain purified phosphogypsum.

[0073] The purified gypsum was tested and found to have a CaSO4·2H2O content (mass content) of 96.12%, a whiteness of 60.35%, and a SiO2 content (mass content) of 1.34%.

[0074] The detection method is as follows:

[0075] The CaSO4·2H2O content was tested according to the national standard "Chemical Analysis Methods for Gypsum" (GB / T 5484-2012);

[0076] The whiteness of the phosphogypsum sample was tested using a WSB-3C whiteness meter manufactured by Hangzhou Qiwei Instrument Co., Ltd.

[0077] Whiteness measurement range is 0%-99%.

[0078] The SiO2 content was tested according to the standard GB / T1873-1995, "Determination of SiO2 Content in Phosphate Rocks and Phosphate Concentrates by Gravimetric and Volumetric Methods".

[0079] Comparative Example 4

[0080] This comparative example provides the application of reverse flotation collectors in the flotation of phosphogypsum. Specifically, it describes a flotation process experiment for desilication purification of phosphogypsum from a certain region in Hubei Province. The phosphogypsum was from a certain region in Hubei Province, and the content of CaSO4·2H2O (mass content) was 90.23%, the content of SiO2 (mass content) was 5.45%, and the whiteness was 29.67%.

[0081] Specifically, the following steps are included:

[0082] S1. Weigh 150g of phosphogypsum and add it to water to prepare a slurry with a mass fraction of 30%.

[0083] S2. Add 100 μL of the reverse flotation collector from Comparative Example 1 to the slurry in S1. Adjust the slurry at a speed of 2000 r / min for 1 min without aeration, and then perform reverse flotation for 8 min.

[0084] S3. The concentrate obtained from flotation in step S2 is filtered and dried to obtain purified phosphogypsum.

[0085] The purified gypsum was tested and found to have a CaSO4·2H2O content (mass content) of 92.12%, a whiteness of 40.35%, and a SiO2 content (mass content) of 4.34%.

[0086] The phosphogypsum raw materials used in Comparative Example 4 and Example 3 were the same, and the procedures were identical, only the composition of the compound collector was changed while the dosage remained unchanged. It was found that in the absence of aviation kerosene, the grade of the purified phosphogypsum (based on CaSO4·2H2O) decreased by about 3%, the whiteness decreased by about 20%, and the SiO2 content increased by about 4%. Dodecylamine has a certain collecting effect on both organic carbon and SiO2. In the non-polar oil-fatty amine combination system, aviation kerosene and dodecylamine act in pairs. Dodecylamine acts as an emulsifier for kerosene, dispersing oil droplets floating on the water surface into small particles. Simultaneously, the oil droplets act as carriers for dodecylamine, existing in the form of active oil droplets. The absence of aviation kerosene causes dodecylamine to act on the slurry system, carrying out more fine gypsum particles, and the collector distribution ratio for SiO2 impurities decreases. Furthermore, the collecting ability of dodecylamine for organic carbon is not as good as that of aviation kerosene, resulting in a decrease in whiteness. It can be seen that the absence of aviation kerosene has a significant impact on organic carbon and SiO2.

[0087] Example 4

[0088] This embodiment 4 provides the application of a reverse flotation collector in the flotation of phosphogypsum. Specifically, it involves a desilication purification flotation process experiment on phosphogypsum from a certain location in Hubei Province. The phosphogypsum has a CaSO4·2H2O content (mass content) of 88.64%, a SiO2 content (mass content) of 6.11%, and a whiteness of 28.34%. The specific steps include:

[0089] S1. Weigh 300g of phosphogypsum and add it to water to prepare a slurry with a mass fraction of 30%.

[0090] S2. Add 200 μL of the reverse flotation collector from Example 2 to the slurry in S1. Adjust the slurry at a speed of 2000 r / min for 1 min without aeration, and then perform reverse flotation for 8 min.

[0091] S3. The concentrate obtained from flotation in step S2 is filtered and dried to obtain purified phosphogypsum.

[0092] The purified gypsum was tested and found to have a CaSO4·2H2O content (mass content) of 95.34%, a whiteness of 59.28%, and a SiO2 content (mass content) of 1.12%.

[0093] Comparative Example 5

[0094] This comparative example provides the application of reverse flotation collectors in the flotation of phosphogypsum. Specifically, it describes a flotation process experiment for desilication purification of phosphogypsum from a certain region in Hubei Province. The phosphogypsum was from a certain region in Hubei Province, and the content of CaSO4·2H2O (mass content) was 88.64%, the content of SiO2 (mass content) was 6.11%, and the whiteness was 28.34%.

[0095] Specifically, the following steps are included:

[0096] S1. Weigh 300g of phosphogypsum and add it to water to prepare a slurry with a mass fraction of 30%.

[0097] S2. Add 200 μL of the reverse flotation collector from Comparative Example 2 to the slurry in S1. Adjust the slurry at a speed of 2000 r / min for 1 min without aeration, and then perform reverse flotation for 8 min.

[0098] S3. The concentrate obtained from flotation in step S2 is filtered and dried to obtain purified phosphogypsum.

[0099] The purified gypsum was tested and found to have a CaSO4·2H2O content (mass content) of 95.26%, a whiteness of 55.55%, and a SiO2 content (mass content) of 1.07%.

[0100] The phosphogypsum raw materials used in Comparative Example 5 and Example 4 were the same, and the procedures were identical, only the composition and amount of the compound collector were changed. It was found that in the absence of n-butanol, the grade (calculated as CaSO4·2H2O) and SiO2 content of the purified phosphogypsum were basically the same as in Example 4, with only a slight decrease in whiteness. n-Butanol acts as a co-emulsifier in the non-polar oil-fatty amine composite system, helping to disperse light diesel oil into smaller particles and improving its ability to collect organic carbon. Therefore, it can be seen that the absence of n-butanol has a certain impact on the removal of organic carbon from phosphogypsum.

[0101] Example 5

[0102] This embodiment provides the application of a reverse flotation collector in the flotation of phosphogypsum, specifically involving a desilication purification flotation process experiment on phosphogypsum from a certain region in Hubei Province. The phosphogypsum in question is from Hubei Province, and its CaSO4·2H2O content (mass content) is 85.23%, SiO2 content (mass content) is 8.16%, and whiteness is 25.43%. The specific steps include:

[0103] S1. Weigh 300g of phosphogypsum and add it to water to prepare a slurry with a mass fraction of 30%.

[0104] S2. Add 200 μL of the reverse flotation collector from Example 1 to the slurry in S1. Adjust the slurry at a speed of 2000 r / min for 1 min without aeration, and then perform reverse flotation for 8 min.

[0105] S3. The concentrate obtained from flotation in step S2 is filtered and dried to obtain purified phosphogypsum.

[0106] The purified gypsum was tested and found to have a CaSO4·2H2O content (mass content) of 95.89%, a whiteness of 61.24%, and a SiO2 content (mass content) of 1.48%.

[0107] Comparative Example 6

[0108] This comparative example provides the application of reverse flotation collectors in the flotation of phosphogypsum. Specifically, it describes a flotation process experiment for desilication purification of phosphogypsum from a certain region in Hubei Province. The phosphogypsum in question is from a certain region in Hubei Province, and its CaSO4·2H2O content (mass content) is 85.23%, SiO2 content (mass content) is 8.16%, and whiteness is 25.43%.

[0109] Specifically, the following steps are included:

[0110] S1. Weigh 300g of phosphogypsum and add it to water to prepare a slurry with a mass fraction of 30%.

[0111] S2. Add 200 μL of the reverse flotation collector from Comparative Example 3 to the slurry in S1. Adjust the slurry at a speed of 2000 r / min for 1 min without aeration, and then perform reverse flotation for 8 min.

[0112] S3. The concentrate obtained from flotation in step S2 is filtered and dried to obtain purified phosphogypsum.

[0113] The purified gypsum was tested and found to have a CaSO4·2H2O content (mass content) of 92.45%, a whiteness of 42.22%, and a SiO2 content (mass content) of 7.48%.

[0114] Comparative Example 6 and Example 5 used the same phosphogypsum raw materials and followed the same procedures, only changing the type and amount of collector. It was observed that in the absence of aviation kerosene and n-butanol, the purified phosphogypsum had a lower grade (based on CaSO4·2H2O), a higher SiO2 content, and moderate whiteness. Amine collectors are commonly used in the collection of quartz minerals and have good collecting ability for SiO2. However, in the phosphogypsum flotation process, with a small amount of tetradecylamine, the surfactant's ability is first utilized to preferentially collect smaller organic carbon particles in the pulp, and then collect quartz. Therefore, it was found that adding only pine oil and tetradecylamine as a compound collector, at a dosage of 200 μl, had a good removal ability for organic carbon, and the whiteness increased by about 17%.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Application of a reverse flotation collector in the flotation of phosphogypsum; The application includes the following steps: Water is added to phosphogypsum to prepare a slurry; Add a reverse flotation collector to the slurry to perform reverse flotation; The anti-float collector comprises the following components by mass fraction: 10% pine oil, 20% non-polar oil, 50% aqueous solution of fatty primary amine, and 20% aqueous solution of alcohol; The non-polar oil is aviation kerosene; The primary fatty amine in the aqueous solution is dodecylamine; The mass fraction of the primary fatty amine in the aqueous solution of the fatty amine is 5%; The alcohol in the aqueous solution is n-butanol; The alcohol has a mass fraction of 8% in the aqueous solution.

2. The application as described in claim 1, characterized in that, The preparation method of the reverse flotation collector includes the following steps: An aqueous solution of a fatty primary amine, terpineol, and a nonpolar oil are mixed and added to an aqueous solution of alcohol. After stirring and sonication, a reverse flotation collector is obtained.

3. The application as described in claim 2, characterized in that, An aqueous solution of a fatty primary amine, terpineol, and a non-polar oil are mixed and added to an aqueous solution of alcohol. After stirring, the mixture is sonicated at 40-50°C for 30-60 minutes to obtain a reverse flotation collector.