A collector for reducing collophanite sesquioxide and a preparation method and application thereof

Abstract

This invention discloses a collector for reducing sesquioxide content in phosphate rock, its preparation method, and its application. The invention involves mixing an interfacial activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stirring the mixture, ultrasonically treating it, and then stirring it in an aqueous solution of etheramine salt to obtain a collector for reducing sesquioxide content in phosphate rock. This collector exhibits high selectivity for phosphate rock separation and significantly improves the problems of poor foam flowability and difficulty in breaking up froth in reverse flotation products. Furthermore, the application of this collector for reducing sesquioxide content in phosphate rock allows for control over the particle size of the grinding product, reducing the impact of fine particles generated by over-grinding on the collector. This significantly improves the recovery rate of phosphate rock and the grade of phosphate concentrate while achieving deep impurity removal.

Description

Technical Field

[0001] This invention relates to the field of collectors for reverse flotation of collophane, specifically to a collector for reducing sesquioxide content in collophane, its preparation method, and its application. Background Technology

[0002] China's phosphate rock is mainly composed of collophane, which is rich in gangue minerals such as silicates and carbonates. These minerals are characterized by complex composition, fine crystals, and difficulty in beneficiation.

[0003] In the existing field of phosphate rock flotation technology, direct flotation is typically used to effectively separate easily beneficiated phosphate rock resources. Conventional single reverse flotation processes mainly use anionic collectors of fatty acid soaps in a weakly acidic environment. The aim is to separate associated gangue minerals such as dolomite from the phosphate rock, thereby reducing the magnesium oxide content and improving the quality of the phosphate concentrate. However, in practical applications, this reagent still suffers from problems such as high flotation temperature, high tailings grade, and low recovery rate.

[0004] For phosphate rock resources with high magnesium content and rich silicon, implementing direct and reverse flotation or double reverse flotation processes is more advantageous. Although the application of direct and reverse flotation is limited due to its complexity and high cost, double reverse flotation processes have shown greater rationality and efficiency in processing such phosphate rock resources. In this process, commonly used amine reagents have shown effectiveness, but also face a series of challenges such as high foaming volume, viscous foam, difficulty in defoaming, poor fluidity, difficulty in processing foam products, poor selectivity, and sensitivity to slime. These problems seriously affect flotation efficiency.

[0005] In summary, there is an urgent need for a collector that has high selectivity, good flotation performance, can be freed from strong acids, can effectively reduce the sesquioxide content in concentrate products, and can significantly improve the grade and recovery rate of phosphate rock flotation. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing collectors for reverse flotation of collophane and to provide a collector that reduces sesquioxide content in collophane. This collector is suitable for reverse flotation processes of collophane, exhibiting good flotation performance and high selectivity. It achieves efficient enrichment of P2O5 during flotation, effectively reducing the sesquioxide content in the concentrate and significantly improving the recovery rate of phosphate rock flotation. Furthermore, it addresses the issues of poor foam flowability and difficulty in breaking up foam in reverse flotation products; it also meets the near-alkaline standard requirements for direct discharge of recycled water, thus contributing to environmental sustainability.

[0007] To achieve the above-mentioned technical objectives, the technical solution provided by the present invention is: a collector for reducing sesquioxide content in collophane, characterized in that it is composed of the following components in mass percentage: 30%–50% aqueous solution of etheramine salt, 30%–60% interfacial activity enhancer, 5%–10% ammonium dodecyl sulfate, and 5%–10% sorbitan monooleate polyoxyethylene ether, wherein the interfacial activity enhancer is one of an aqueous solution of alcohol, an aqueous solution of ether, or an aqueous solution of nonpolar oil.

[0008] The above-mentioned collector for reducing sesquioxide content in collophane is characterized by comprising the following components in weight percentage: 40% aqueous solution of the etheramine salt, 40% of the interfacial activity enhancer, 10% of the ammonium dodecyl sulfate, and 10% of the sorbitan monooleate polyoxyethylene ether.

[0009] The above-mentioned collector for reducing sesquioxide content in phosphate rock is characterized in that the aqueous solution of the etheramine salt contains 20% to 40% by mass, the solute in the interfacial activity enhancer contains 20% to 40% by mass, the alcohol is one or a combination of polydimethylsiloxane, polydiethylsiloxane and PPG-type polypropylene glycol, the ether is polyoxypropylene glycerol ether, and the non-polar oil is aviation kerosene and / or light diesel oil.

[0010] The above-mentioned collector for reducing sesquioxide content in collophane is characterized in that the aqueous solution of the etheramine salt has a mass percentage content of 40% and the solute in the interfacial activity enhancer has a mass percentage content of 30%.

[0011] Another object of the present invention is to obtain the collector simply and quickly.

[0012] To achieve the above objectives, the technical solution of the present invention is to provide a method for preparing a collector that reduces sesquioxide content in collophane, characterized by comprising the following steps:

[0013] Step 1: Mix the surfactant enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir, and then place in an ultrasonic device for ultrasonic dispersion to obtain a mixture;

[0014] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir to obtain a collector.

[0015] The method for preparing a collector for reducing sesquioxide content in collophane is characterized in that the stirring in both steps one and two is performed using a magnetic stirrer, with a stirring rate of 300 r / min to 500 r / min and a stirring time of 20 min to 30 min; the ultrasonic device in step one is an ultrasonic disperser, with an ultrasonic temperature of 40℃ to 50℃ and an ultrasonic time of 30 min to 60 min.

[0016] The third objective of this invention is to enable the collector of this invention to be applied in actual processes, and to significantly improve the recovery rate of phosphate rock and the grade of phosphate concentrate through process optimization; at the same time, the process is simple, low in cost, and suitable for industrial application.

[0017] To achieve the above objectives, the technical solution provided by this invention is: an application of a collector for reducing sesquioxides in collophane, characterized by comprising the following steps:

[0018] Step 1: Prepare grinding water and phosphate rock sample in equal mass ratios. Add the phosphate rock sample to the rod mill all at once, then add the grinding water to the rod mill in batches for three-stage grinding. The specific steps include:

[0019] Step 101: Mix the collophane ore sample with the first batch of water, and place it in the rod mill for the first stage of grinding to obtain a mineral-water mixture;

[0020] Step 102: Add a second batch of water to the mineral-water mixture obtained in step 101 and perform a second stage of grinding to obtain a roughing solution for the slurry;

[0021] Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding.

[0022] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, add the collector into the flotation machine and perform roughing flotation to obtain flotation rough concentrate and roughing tailings;

[0023] Step 3: Feed the rough concentrate obtained in Step 2 into the flotation machine, and add an acidic adjuster to adjust the pH in the flotation machine to obtain a weakly acidic pulp.

[0024] Step 4: Add magnesium removal collector to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain concentrate and tailings II;

[0025] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0026] The above-mentioned application of a collector for reducing sesquioxide in collophane is characterized in that the grinding media of the rod mill in step one is steel rods, which are composed of at least three different diameter steel rods, the diameters of which are Ф75mm, Ф65mm and Ф50mm respectively; the mass ratio of the Ф75mm steel rod, the Ф65mm steel rod and the Ф50mm steel rod is 4:4:2.

[0027] In step 101, the mass of the first batch of water accounts for 60% to 70% of the mass of the grinding water, and the grinding time of the first stage of grinding is 2 minutes; in step 102, the grinding time of the second stage of grinding is 2 minutes.

[0028] The above-mentioned method for applying a collector to reduce sesquioxides in collophane is characterized in that the amount of collector used in step two is 400g to 800g / t collophane sample, and the pH of the flotation rough concentrate in step two is 7 to 9.

[0029] The acidity modifier mentioned in step three is phosphoric acid and / or sulfuric acid, and the dosage of the acidity modifier is 2 kg to 6 kg / t of phosphate rock sample;

[0030] The magnesium removal collector mentioned in step four is oleic acid or naphthenic acid, and the dosage of the magnesium removal collector is 100g to 400g / t of phosphate rock sample.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention provides a collector for reducing sesquioxide content in collophane. By modifying dodecylamine to obtain an etheramine salt, a hydrophilic etheroxy group is introduced into the collector, increasing the solubility of the collector, enhancing the adsorption of the collector at the gas-liquid interface, further improving the foaming performance, and thus enhancing the collector's ability and selectivity for silicate minerals.

[0033] 2. A method for preparing a collector for reducing sesquioxide content in collophane, according to the present invention, uses an aqueous solution of alcohol, an aqueous solution of ether, or an aqueous solution of non-polar oil as an interfacial activity enhancer. This effectively ensures that the collector has a good collecting effect while enhancing the fluidity of the foam and making the foam easier to break. Since the use of a large amount of sulfuric acid is avoided in the flotation process using the collector, the pH of the flotation concentrate is maintained at 7-9, thereby improving the versatility of the collector prepared by the present invention.

[0034] 3. The application of a collector for reducing sesquioxides in collophane minerals according to the present invention couples fine grinding with targeted flotation enrichment, thereby achieving deep impurity removal of multiple elements; fine grinding effectively controls particle size, reducing the impact of fine particles generated by over-grinding during reverse flotation on the collector; the collophane mineral sample is sorted through a double reverse flotation process, effectively achieving efficient and directional enrichment of phosphorus; the collector prepared according to the present invention is used for efficient enrichment of phosphorus in the collophane mineral sample in the first step, and a magnesium removal collector is used for directional removal of magnesium in the collophane mineral sample in the second step, significantly reducing the content of sesquioxides in the concentrate.

[0035] 4. The application of a collector for reducing sesquioxides in collophane ore according to the present invention can significantly improve the recovery rate of refractory siliceous calcium phosphate ore and the grade of phosphate concentrate; it avoids the use of large amounts of sulfuric acid in the flotation process using collectors, making the flotation rough concentrate a near-alkaline environment, effectively reducing the corrosion of flotation equipment by acidic pulp, thereby greatly extending the service life of the equipment; the process is simple, low in cost, and suitable for industrial application. Attached Figure Description

[0036] Figure 1 This is a flowchart illustrating the application of a collector for reducing sesquioxide content in collophane according to the present invention. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention. All materials and instruments used in the following embodiments are commercially available.

[0038] In the embodiments of the present invention, the collophane used in 1 to 8 is a siliceous calcium collophane from a certain place in Guizhou. The main minerals of the collophane are fluorapatite, quartz, mica, dolomite, kaolinite, etc., of which the mass percentage of P2O5 is 28.77% and the mass percentage of R2O3 (Al2O3+Fe2O3) is 5.39%.

[0039] In the application methods of Examples 1 to 8, the grinding media of the rod mill is steel rod, which is composed of three steel rods with different diameters, namely Ф75mm, Ф65mm and Ф50mm; the mass ratio of the Ф75mm steel rod, the Ф65mm steel rod and the Ф50mm steel rod is 4:4:2.

[0040] The technical solution of the present invention will be described in further detail below, but the scope of protection of the present invention is not limited to the following description.

[0041] Example 1

[0042] A collector for reducing sesquioxide content in collophane, as described in this embodiment, comprises the following components in weight percentage: 40% aqueous solution of the etheramine salt, 40% of the interfacial activity enhancer, 10% of the ammonium dodecyl sulfate, and 10% of the sorbitan monooleate polyoxyethylene ether.

[0043] The aqueous solution of the etheramine salt contains 40% by mass of the etheramine salt, and the surfactant contains 30% by mass of the solute.

[0044] The interfacial activity enhancer is an aqueous solution of an alcohol, wherein the alcohol is polydimethylsiloxane.

[0045] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0046] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 30 minutes at a stirring speed of 500 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 50°C for 60 minutes to obtain a mixture.

[0047] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 30 minutes at a stirring speed of 500 r / min to obtain the collector.

[0048] This embodiment describes a method for using a collector to reduce sesquioxide content in collophane, comprising the following steps:

[0049] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water. Add the 1 kg collophane ore sample to the rod mill all at once, and then add the grinding water to the rod mill in batches for three-stage grinding, including the following steps:

[0050] Step 101: Mix the ore sample with 0.7 kg of the first batch of water, and place it in the rod mill for a first stage of grinding for 2 minutes to obtain a ore-water mixture;

[0051] Step 102: Add 0.3 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0052] Step 103: The roughing solution of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.38%.

[0053] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 800g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 9.

[0054] Step 3: Feed the flotation rough concentrate with pH 9 obtained in Step 2 into the flotation machine, and add 6 kg / t of phosphoric acid from the phosphate rock sample into the flotation machine to obtain a weakly acidic pulp.

[0055] Step 4: Add 400g / t of oleic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain oleic phosphate concentrate and tailings II.

[0056] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0057] Following the application method of Example 1, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 1.

[0058] Table 1

[0059] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[R2O3 content / %]]> Flotation foam volume / L Concentrate 74.10 34.81 77.58 1.75 - Tailings II 31.96 17.81 20.43 - - Tailings I 4.11 13.83 1.99 - 1.10

[0060] As shown in Table 1, in Example 1, after treatment with the mineral processing reagents and processes of this invention, the P2O5 grade in the obtained collophane concentrate increased to 34.81%, the P2O5 recovery rate was 77.58%, and the R2O3 content was 1.75%. Compared with the original ore, the P2O5 grade increased by 6.04%, and the R2O3 content decreased by 3.64%. This proves that this invention can effectively separate collophane concentrate from siliceous calcium collophane ore, achieve efficient resource recovery, and the reverse flotation roughing tailings have good foam flowability and are easy to break, which can effectively utilize high-collophane resources.

[0061] Example 2

[0062] A collector for reducing sesquioxide content in collophane, as described in this embodiment, comprises the following components in weight percentage: 50% aqueous solution of the etheramine salt, 30% of the interfacial activity enhancer, 10% of the ammonium dodecyl sulfate, and 10% of the sorbitan monooleate polyoxyethylene ether.

[0063] The aqueous solution of the etheramine salt contains 40% by mass of the etheramine salt, and the surfactant contains 20% by mass of the solute.

[0064] The interfacial activity enhancer is an aqueous solution of an alcohol, wherein the alcohol is polydiethylsiloxane.

[0065] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0066] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 20 minutes at a stirring speed of 300 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 40°C for 30 minutes to obtain a mixture.

[0067] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 20 minutes at a stirring rate of 300 r / min to obtain the collector.

[0068] A method for applying a collector that reduces sesquioxide content in collophane includes the following steps:

[0069] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water. Add the 1 kg collophane ore sample to the rod mill all at once, and then add the grinding water to the rod mill in batches for three-stage grinding, including the following steps:

[0070] Step 101: Mix the collophane ore sample with 0.6 kg of the first batch of water, and place it in the rod mill for 2 minutes of first-stage grinding to obtain a mineral-water mixture;

[0071] Step 102: Add 0.4 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0072] Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.35%.

[0073] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 400g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 7.

[0074] Step 3: Feed the flotation rough concentrate with pH 7 obtained in Step 2 into the flotation machine, and add 2 kg / t of sulfuric acid of phosphate rock sample into the flotation machine to obtain a weakly acidic pulp.

[0075] Step 4: Add 100g / t naphthenic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain collophane concentrate and tailings II.

[0076] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0077] Following the application method of Example 2, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 2.

[0078] Table 2

[0079] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[Content of R2O3 / %]]> Flotation foam volume / L Concentrate 63.93 34.68 77.73 1.95 - Tailings II 31.96 17.96 20.13 - - Tailings I 4.11 14.83 2.14 - 1.25

[0080] As shown in Table 2, in Example 2, after processing with the beneficiation process of the present invention, the P2O5 grade in the obtained collophane concentrate increased to 34.68%, and the P2O5 recovery rate was 77.73%. Compared with the original ore, the P2O5 grade increased by 5.91%, and the R2O3 content decreased by 3.44%. Clearly, the beneficiation process of the present invention can separate collophane concentrate from siliceous-calcareous collophane ore, achieving effective resource recovery. Furthermore, the reverse flotation tailings exhibit good frothing effect and are easily crushed, enabling effective comprehensive utilization of high-collophane resources.

[0081] Example 3

[0082] A collector for reducing sesquioxide content in collophane, according to this embodiment, is composed of the following components in weight percentage: 30% aqueous solution of the etheramine salt, 60% of the interfacial activity enhancer, 5% of the ammonium dodecyl sulfate, and 5% of the sorbitan monooleate polyoxyethylene ether.

[0083] The aqueous solution of the etheramine salt contains 30% by mass of the etheramine salt, and the surfactant contains 30% by mass of the solute.

[0084] The interfacial activity enhancer is an aqueous solution of a non-polar oil, and the non-polar oil is light diesel oil.

[0085] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0086] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 25 minutes at a stirring speed of 400 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 45°C for 50 minutes to obtain a mixture.

[0087] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 25 minutes at a stirring rate of 400 r / min to obtain the collector.

[0088] A method for applying a collector that reduces sesquioxide content in collophane includes the following steps:

[0089] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water. Add the 1 kg collophane ore sample to the rod mill all at once, and then add the grinding water to the rod mill in batches for three-stage grinding, including the following steps:

[0090] Step 101: Mix the collophane ore sample with 0.65 kg of the first batch of water, and place it in the rod mill for 2 minutes of first-stage grinding to obtain a mineral-water mixture;

[0091] Step 102: Add 0.35 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0092] Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.28%.

[0093] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 500g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 8.

[0094] Step 3: Feed the flotation rough concentrate with pH 8 obtained in Step 2 into the flotation machine, and add a mixed acid solution of phosphoric acid and sulfuric acid of 4 kg / t phosphate rock sample into the flotation machine to obtain a weakly acidic pulp.

[0095] Step 4: Add 300g / t of oleic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain oleic phosphate concentrate and tailings II.

[0096] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0097] Following the application method of Example 3, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 3.

[0098] Table 3

[0099] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[R2O3 content / %]]> Flotation foam volume / L Concentrate 71.16 34.75 76.71 1.79 - Tailings II 34.64 17.96 20.13 - - Tailings I 4.20 14.83 3.16 - 1.15

[0100] As shown in Table 3, in Example 3, after processing with the beneficiation process of the present invention, the P2O5 grade in the obtained collophane concentrate increased to 34.75%, and the P2O5 recovery rate was 76.71%. Compared with the original ore, the P2O5 grade increased by 5.98%, and the R2O3 content decreased by 3.60%. Clearly, the beneficiation process of the present invention can separate collophane concentrate from siliceous-calcareous collophane ore, achieving effective resource recovery. Furthermore, the reverse flotation tailings exhibit good frothing effect and are easily crushed, enabling effective comprehensive utilization of high-collophane resources.

[0101] Example 4

[0102] A collector for reducing sesquioxide content in collophane, as described in this embodiment, comprises the following components in weight percentage: 40% aqueous solution of the etheramine salt, 50% of the interfacial activity enhancer, 5% of the ammonium dodecyl sulfate, and 5% of the sorbitan monooleate polyoxyethylene ether.

[0103] The aqueous solution of the etheramine salt contains 30% by mass of the etheramine salt, and the surfactant contains 30% by mass of the solute.

[0104] The interfacial activity enhancer is an aqueous solution of ether, and the ether is polyoxypropylene glycerol ether.

[0105] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0106] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 30 minutes at a stirring speed of 500 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 50°C for 60 minutes to obtain a mixture.

[0107] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 30 minutes at a stirring speed of 500 r / min to obtain the collector.

[0108] A method for applying a collector that reduces sesquioxide content in collophane includes the following steps:

[0109] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water. Add the 1 kg collophane ore sample to the rod mill all at once, and then add the grinding water to the rod mill in batches for three-stage grinding, including the following steps:

[0110] Step 101: Mix the collophane ore sample with 0.6 kg of the first batch of water, and place it in the rod mill for 2 minutes of first-stage grinding to obtain a mineral-water mixture;

[0111] Step 102: Add 0.4 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0112] Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.35%.

[0113] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 700g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 9.

[0114] Step 3: Feed the flotation rough concentrate with pH 9 obtained in Step 2 into the flotation machine, and add 5 kg / t of sulfuric acid from the phosphate rock sample to the flotation machine to obtain a weakly acidic pulp.

[0115] Step 4: Add 300 g / t of naphthenic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain collophane concentrate and tailings II;

[0116] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0117] Following the application method of Example 4, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 4.

[0118] Table 4

[0119] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[Content of R2O3 / %]]> Flotation foam volume / L Concentrate 74.21 34.24 76.53 1.93 - Tailings II 22.64 17.96 20.13 - - Tailings I 3.15 14.83 3.34 - 1.20

[0120] As shown in Table 4, in Example 4, after processing with the beneficiation process of the present invention, the P2O5 grade in the obtained collophane concentrate increased to 35.14%, and the P2O5 recovery rate was 76.53%. Compared with the original ore, the P2O5 grade increased by 5.47%, and the R2O3 content decreased by 3.46%. Clearly, the beneficiation process of the present invention can separate collophane concentrate from siliceous-calcareous collophane ore, achieving effective resource recovery. Furthermore, the reverse flotation tailings exhibit good frothing effect and are easily crushed, enabling effective comprehensive utilization of high-collophane resources.

[0121] Example 5

[0122] A collector for reducing sesquioxide content in phosphate rock according to this embodiment is composed of the following components in weight percentage: 40% aqueous solution of the etheramine salt, 45% of the interfacial activity enhancer, 10% of the ammonium dodecyl sulfate, and 5% of the sorbitan monooleate polyoxyethylene ether.

[0123] The aqueous solution of the etheramine salt contains 25% by mass of the etheramine salt, and the surfactant contains 35% by mass of the solute.

[0124] The interfacial activity enhancer is an aqueous solution of a non-polar oil, which is a mixture of aviation kerosene and light diesel oil.

[0125] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0126] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 25 min at a stirring speed of 300 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 45°C for 50 min to obtain a mixture.

[0127] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 25 minutes at a stirring rate of 300 r / min to obtain the collector.

[0128] A method for applying a collector that reduces sesquioxide content in collophane includes the following steps:

[0129] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water. Add the 1 kg collophane ore sample to the rod mill all at once, and then add the grinding water to the rod mill in batches for three-stage grinding, including the following steps:

[0130] Step 101: Mix the collophane ore sample with 0.7 kg of the first batch of water, and place it in the rod mill for the first stage of grinding for 2 minutes to obtain a mineral-water mixture;

[0131] Step 102: Add 0.3 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0132] Step 103: The roughing solution of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.29%.

[0133] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 500g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 7.

[0134] Step 3: Feed the flotation rough concentrate with pH 7 obtained in Step 2 into the flotation machine, and add 3 kg / t of phosphoric acid from the phosphate rock sample into the flotation machine to obtain a weakly acidic pulp.

[0135] Step 4: Add 200g / t of oleic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain oleic acid concentrate and tailings II.

[0136] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0137] Following the application method of Example 5, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 5.

[0138] Table 5

[0139] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 Recovery Rate / %]]> <![CDATA[Content of R2O3 / %]]> Flotation foam volume / L Concentrate 74.24 34.57 76.89 1.77 - Tailings II 22.13 17.69 20.22 - - Tailings I 3.63 14.24 2.89 - 1.20

[0140] As shown in Table 5, in Example 5, after processing with the beneficiation process of the present invention, the P2O5 grade in the obtained collophane concentrate increased to 34.97%, and the P2O5 recovery rate was 76.89%. Compared with the original ore, the P2O5 grade increased by 5.70%, and the R2O3 content decreased by 3.62%. Clearly, the beneficiation process of the present invention can separate collophane concentrate from siliceous-calcareous collophane ore, achieving effective resource recovery. Furthermore, the reverse flotation tailings exhibit good frothing effect and are easily crushed, enabling effective comprehensive utilization of high-collophane resources.

[0141] Example 6

[0142] A collector for reducing sesquioxide content in collophane, as described in this embodiment, comprises the following components in weight percentage: 30% aqueous solution of the etheramine salt, 55% of the interfacial activity enhancer, 10% of the ammonium dodecyl sulfate, and 5% of the sorbitan monooleate polyoxyethylene ether.

[0143] The aqueous solution of the etheramine salt contains 30% by mass of the etheramine salt, and the surfactant contains 40% by mass of the solute.

[0144] The interfacial activity enhancer is an aqueous solution of an alcohol, wherein the alcohol is PPG-type polypropylene glycol;

[0145] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0146] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 20 minutes at a stirring speed of 400 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 50°C for 30 minutes to obtain a mixture.

[0147] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 20 minutes at a stirring rate of 400 r / min to obtain the collector.

[0148] A method for applying a collector that reduces sesquioxide content in collophane includes the following steps:

[0149] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water for three-stage grinding, including the following steps:

[0150] Step 101: Mix the collophane ore sample with 0.7 kg of the first batch of water, and place it in the rod mill for the first stage of grinding for 2 minutes to obtain a mineral-water mixture;

[0151] Step 102: Add 0.3 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0152] Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.34%.

[0153] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 600g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 8.

[0154] Step 3: Feed the flotation rough concentrate with pH 8 obtained in Step 2 into the flotation machine, and add 4 kg / t of sulfuric acid of phosphate rock sample into the flotation machine to obtain a weakly acidic pulp.

[0155] Step 4: Add 300g / t naphthenic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain collophane concentrate and tailings II.

[0156] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0157] Following the application method of Example 6, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 6.

[0158] Table 6

[0159] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[R2O3 content / %]]> Flotation foam volume / L Concentrate 75.11 33.91 75.98 1.88 - Tailings II 20.29 18.34 21.23 - - Tailings I 4.60 14.28 2.79 - 1.10

[0160] As shown in Table 6, in Example 6, after processing with the beneficiation process of the present invention, the P2O5 grade in the obtained collophane concentrate increased to 34.91%, and the P2O5 recovery rate was 75.98%. Compared with the original ore, the P2O5 grade increased by 5.14%, and the R2O3 content decreased by 3.51%. Clearly, the beneficiation process of the present invention can separate collophane concentrate from siliceous-calcareous collophane ore, achieving effective resource recovery. Furthermore, the reverse flotation tailings exhibit good frothing effect and are easily crushed, enabling effective comprehensive utilization of high-collophane resources.

[0161] Example 7

[0162] A collector for reducing sesquioxide content in collophane, as described in this embodiment, comprises the following components in weight percentage: 40% aqueous solution of the etheramine salt, 40% of the interfacial activity enhancer, 10% of the ammonium dodecyl sulfate, and 10% of the sorbitan monooleate polyoxyethylene ether.

[0163] The aqueous solution of the etheramine salt contains 30% by mass of the etheramine salt, and the surfactant contains 30% by mass of the solute.

[0164] The interfacial activity enhancer is an aqueous solution of a non-polar oil; the non-polar oil is aviation kerosene.

[0165] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0166] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 30 minutes at a stirring speed of 500 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 40°C for 30 minutes to obtain a mixture.

[0167] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 30 minutes at a stirring speed of 500 r / min to obtain the collector.

[0168] A method for applying a collector that reduces sesquioxide content in collophane includes the following steps:

[0169] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water. Add the 1 kg collophane ore sample to the rod mill all at once, and then add the grinding water to the rod mill in batches for three-stage grinding, including the following steps:

[0170] Step 101: Mix the collophane ore sample with 0.6 kg of the first batch of water, and place it in the rod mill for 2 minutes of first-stage grinding to obtain a mineral-water mixture;

[0171] Step 102: Add 0.4 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0172] Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.35%.

[0173] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 500g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 7.

[0174] Step 3: Feed the flotation rough concentrate with pH 7 obtained in Step 2 into the flotation machine, and add 5 kg / t of phosphoric acid from the phosphate rock sample into the flotation machine to obtain a weakly acidic pulp.

[0175] Step 4: Add 400g / t naphthenic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain collophane concentrate and tailings II.

[0176] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0177] Following the application method of Example 7, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 7.

[0178] Table 7

[0179] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[Recovery rate of P2O5 / %]]> <![CDATA[R2O3 content / %]]> Flotation foam volume / L Concentrate 73.29 35.01 76.24 1.89 - Tailings II 23.44 16.34 21.12 - - Tailings I 3.27 13.15 2.64 - 1.20

[0180] As shown in Table 7, in Example 7, after processing with the beneficiation process of the present invention, the P2O5 grade in the obtained collophane concentrate increased to 35.01%, and the P2O5 recovery rate was 75.94%. Compared with the original ore, the P2O5 grade increased by 6.24%, and the R2O3 content decreased by 3.50%. Clearly, the beneficiation process of the present invention can separate collophane concentrate from siliceous-calcareous collophane ore, achieving effective resource recovery. Furthermore, the reverse flotation tailings exhibit good frothing effect and are easily crushed, enabling effective comprehensive utilization of high-collophane resources.

[0181] Example 8

[0182] A collector for reducing sesquioxide content in phosphate rock according to this embodiment is composed of the following components in weight percentage: 38% aqueous solution of the etheramine salt, 50% of the interfacial activity enhancer, 6% of the ammonium dodecyl sulfate, and 6% of the sorbitan monooleate polyoxyethylene ether.

[0183] The aqueous solution of the etheramine salt contains 35% by mass of the etheramine salt, and the surfactant contains 35% by mass of the solute.

[0184] The interfacial activity enhancer is an aqueous solution of an alcohol, wherein the alcohol is a mixed alcohol solution of polydimethylsiloxane and diethylsiloxane.

[0185] A method for preparing a collector that reduces sesquioxide content in collophane includes the following steps:

[0186] Step 1: Mix the surface activity enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir with a magnetic stirrer for 30 min at a stirring speed of 400 r / min, and then place the mixture in an ultrasonic disperser for ultrasonic dispersion at a temperature of 40°C for 30 min to obtain a mixture.

[0187] Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir with a magnetic stirrer for 30 minutes at a stirring rate of 400 r / min to obtain the collector.

[0188] A method for applying a collector that reduces sesquioxide content in collophane includes the following steps:

[0189] Step 1: Prepare 1 kg of collophane ore sample and 1 kg of grinding water. Add the 1 kg collophane ore sample to the rod mill all at once, and then add the grinding water to the rod mill in batches for three-stage grinding, including the following steps:

[0190] Step 101: Mix the collophane ore sample with 0.6 kg of the first batch of water, and place it in the rod mill for 2 minutes of first-stage grinding to obtain a mineral-water mixture;

[0191] Step 102: Add 0.4 kg of the second batch of water to the mineral-water mixture obtained in step 101, and perform a second-stage grinding for 2 minutes to obtain a roughing solution for the slurry;

[0192] Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. The proportion of material with a grinding fineness of less than 0.074 mm in the fine slurry is 71.28%.

[0193] Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, and add 500g / t of the collector of the phosphate rock sample into the flotation machine for roughing flotation to obtain a rough concentrate and roughing tailings with a pH of 8.

[0194] Step 3: Feed the flotation rough concentrate with pH 8 obtained in Step 2 into the flotation machine, and add 5 kg / t of phosphoric acid from the phosphate rock sample into the flotation machine to obtain a weakly acidic pulp.

[0195] Step 4: Add 400g / t of oleic acid to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain oleic phosphate concentrate and tailings II.

[0196] Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

[0197] Following the application method of Example 8, a flotation test was conducted on the obtained collector for reducing sesquioxide content in collophane. The experimental data are shown in Table 8.

[0198] Table 8

[0199] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[R2O3 content / %]]> Flotation foam volume / L Concentrate 75.12 34.29 74.38 1.93 - Tailings II 20.64 16.48 22.02 - - Tailings I 4.24 12.21 3.60 - 1.15

[0200] As shown in Table 8, in Example 8, after processing with the beneficiation process of the present invention, the P2O5 grade in the obtained collophane concentrate increased to 34.29%, and the P2O5 recovery rate was 74.38%. Compared with the original ore, the P2O5 grade increased by 5.52%, and the R2O3 content decreased by 3.46%. Clearly, the beneficiation process of the present invention can separate collophane concentrate from siliceous-calcareous collophane ore, achieving effective resource recovery. Furthermore, the reverse flotation tailings exhibit good frothing effect and are easily crushed, enabling effective comprehensive utilization of high-collophane resources.

[0201] Comparative Example 1

[0202] The collophane sample and application method described in Example 6 were used to recover the collophane sample, with the difference being that no PPG-type polypropylene glycol aqueous solution was added. Specific beneficiation test parameters are shown in Table 9.

[0203] Table 9

[0204]

[0205]

[0206] As shown in Table 9, the grade and recovery rate of P2O5 obtained by aqueous solution without adding PPG type polypropylene glycol are not much different from the test indicators of Example 6. However, the flowability of the roughing flotation foam is extremely poor, and the amount of residual foam is much greater than the test indicators of Example 6, making scavenging impossible.

[0207] Comparative Example 2

[0208] The collophane sample and application method of Example 4 were used to recover the collophane sample, except that diethyl phthalate solution was used instead of the aqueous solution of polyoxypropylene glycerol ether. The specific mineral processing test indicators are shown in Table 10.

[0209] Table 10

[0210] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[Content of R2O3 / %]]> Flotation foam volume / L Concentrate 58.19 33.90 68.91 1.9 - Tailings II 7.88 12.95 3.74 - - Tailings I 5.30 3.31 19.17 - 3.13

[0211] As shown in Table 10, when diethyl phthalate solution was used instead of the aqueous solution of polyoxypropylene glycerol ether, the recovery rate of P2O5 obtained was significantly lower than that of Example 4, and the amount of residual flotation foam was significantly greater than that of Example 4.

[0212] Comparative Example 3

[0213] The collophane sample and application method in Example 7 were used to recover the collophane sample, except that no aviation kerosene was added to the aqueous solution. The specific mineral processing test indicators are shown in Table 11.

[0214] Table 11

[0215] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[Content of R2O3 / %]]> Flotation foam volume / L Concentrate 62.71 33.82 71.65 1.9 - Tailings II 2.01 13.25 3.49 - - Tailings I 35.98 21.42 24.86 - 3.57

[0216] As shown in Table 11, the grade and recovery rate of P2O5 obtained from the aqueous solution without the addition of aviation kerosene are not much different from the test indicators of Example 7. However, the flowability of the roughing flotation foam is extremely poor, and the amount of residual foam is much greater than the test indicators of Example 7, making scavenging impossible.

[0217] Comparative Example 4

[0218] The collophane sample and application method of Example 3 were used to recover the collophane sample, except that cocamidopropylamine oxide was used instead of the aqueous solution of the etheramine salt. The specific mineral processing test indicators are shown in Table 12.

[0219] Table 12

[0220] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[Recovery rate of P2O5 / %]]> <![CDATA[R2O3 content / %]]> Flotation foam volume / L Concentrate 70.13 31.97 76.96 2.17 - Tailings II 1.91 13.20 0.87 - - Tailings I 8.25 18.78 5.32 - 2.34

[0221] As shown in Table 12, the grade of P2O5 obtained by replacing the aqueous solution of the etheramine salt with cocamidopropylamine oxide was significantly lower than that of the test index in Example 3.

[0222] Comparative Example 5

[0223] The collophane sample and application method of Example 3 were used to recover the collophane sample, except that dodecylamine polyoxyethylene ether was used instead of the aqueous solution of the etheramine salt. The specific mineral processing test indicators are shown in Table 13.

[0224] Table 13

[0225] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 recovery rate / %]]> <![CDATA[Content of R2O3 / %]]> Flotation foam volume / L Concentrate 73.68 31.26 79.06 2.23 - Tailings II 2.37 12.68 1.03 - - Tailings I 7.63 20.76 5.44 - 3.44

[0226] As shown in Table 13, the grade of P2O5 obtained by replacing the aqueous solution of the etheramine salt with dodecylamine polyoxyethylene ether was significantly lower than the test index of Example 3.

[0227] Comparative Example 6

[0228] The collophane sample and application method of Example 1 were used to recover the collophane sample, except that an ether amine was used instead of the aqueous solution of the ether amine salt. The specific mineral processing test indicators are shown in Table 14.

[0229] Table 14

[0230] product Yield / % <![CDATA[P2O5 grade / %]]> <![CDATA[P2O5 Recovery Rate / %]]> <![CDATA[R2O3 content / %]]> Flotation foam volume / L Concentrate 69.77 32.21 77.14 2.01 - Tailings II 2.19 15.05 1.13 - - Tailings I 8.94 17.92 5.50 - 3.35

[0231] As shown in Table 14, the grade of P2O5 obtained by replacing the aqueous solution of the etheramine salt with an etheramine is significantly lower than the test index of Example 1.

[0232] In summary, the collector prepared by the process of this invention has a higher P2O5 grade due to the selection of raw materials, resulting in lower foam content and better foam fluidity in the tailings. Comparative Examples 4-6 show that the etheramine salt obtained by modifying dodecylamine can introduce hydrophilic etheroxy groups into the collector prepared by this invention, increasing the solubility of the agent, enhancing the adsorption of the agent at the gas-liquid interface, and further improving the foaming performance. This results in enhanced collecting ability and selectivity of etheramine for silicate minerals.

[0233] The raw materials of this invention are further limited to an aqueous solution of an alcohol, wherein the alcohol is one or more of polydimethylsiloxane, polydiethylsiloxane, and PPG-type polypropylene glycol; an aqueous solution of polyoxypropylene glycerol ether is particularly selected in the aqueous solution of an ether; and an aqueous solution of a non-polar oil, wherein the non-polar oil is one or more of aviation kerosene and light diesel oil. Comparative Examples 1 to 3 illustrate that the selected interfacial activity enhancer enables the collector prepared by this invention to reduce the amount of tailings foam during flotation, facilitate crushing, improve flotation efficiency, and optimize the flotation process.

[0234] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the spirit and technical essence of the present invention. Therefore, any simple modifications, equivalent substitutions, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall still fall within the protection scope of the technical solutions of the present invention.

Claims

1. A collector for reducing sesquioxide content in collophane, characterized in that, It is composed of the following components in mass percentage: 30%–50% aqueous solution of etheramine salt, 30%–60% surfactant, 5%–10% ammonium dodecyl sulfate, and 5%–10% sorbitan monooleate polyoxyethylene ether; The etheramine salt in the aqueous solution is a salt of an etheramine obtained by modifying dodecylamine to introduce etheroxy groups; The interfacial activity enhancer is one of the following: an aqueous solution of polyoxypropylene glycerol ether, an aqueous solution of polydimethylsiloxane, or an aqueous solution of aviation kerosene.

2. The collector for reducing sesquioxide content in collophane according to claim 1, characterized in that, It is composed of the following components in weight percentage: 40% aqueous solution of the etheramine salt, 40% of the interfacial activity enhancer, 10% of the ammonium dodecyl sulfate, and 10% of the sorbitan monooleate polyoxyethylene ether.

3. A method for preparing a collector for reducing sesquioxide content in collophane as described in claim 1, characterized in that, Includes the following steps: Step 1: Mix the surfactant enhancer, ammonium dodecyl sulfate, and sorbitan monooleate polyoxyethylene ether, stir, and then place in an ultrasonic device for ultrasonic dispersion to obtain a mixture; Step 2: Place the mixture obtained in Step 1 into an aqueous solution of etheramine salt and stir to obtain a collector.

4. The method for preparing a collector for reducing sesquioxide content in collophane according to claim 3, characterized in that, The stirring in both steps one and two is carried out using a magnetic stirrer with a stirring rate of 300 r / min to 500 r / min and a stirring time of 20 min to 30 min. The ultrasonic device in step one is an ultrasonic disperser with an ultrasonic temperature of 40℃ to 50℃ and an ultrasonic time of 30 min to 60 min.

5. The application of a collector for reducing sesquioxide content in collophane as described in claim 1, characterized in that, Includes the following steps: Step 1: Prepare grinding water and phosphate rock sample in equal mass ratios. Add the phosphate rock sample to the rod mill all at once, then add the grinding water to the rod mill in batches for three-stage grinding. The specific steps include: Step 101: Mix the collophane ore sample with the first batch of water, and place it in the rod mill for the first stage of grinding to obtain a mineral-water mixture; Step 102: Add a second batch of water to the mineral-water mixture obtained in step 101 and perform a second stage of grinding to obtain a roughing solution for the slurry; Step 103: The roughing liquid of the slurry obtained in step 102 is screened by a drum screen to obtain coarse ore particles and fine slurry. The coarse ore particles are returned sequentially for the third stage of grinding. Step 2: Feed the fine slurry obtained in step 103 into a flotation machine, add the collector into the flotation machine and perform roughing flotation to obtain flotation rough concentrate and roughing tailings; Step 3: Feed the rough concentrate obtained in Step 2 into the flotation machine, and add an acidic adjuster to adjust the pH in the flotation machine to obtain a weakly acidic pulp. Step 4: Add magnesium removal collector to the weakly acidic slurry obtained in Step 3 and then perform flotation to obtain concentrate and tailings II; Step 5: Feed the roughing tailings obtained in Step 2 into a flotation machine and perform three flotation scavenging processes on the roughing tailings. The middlings are returned sequentially to obtain tailings I.

6. The method for applying a collector to reduce sesquioxide content in collophane according to claim 5, characterized in that, The grinding media of the rod mill in step one is steel rods, which are composed of at least three different diameter steel rods, namely Ф75mm, Ф65mm and Ф50mm; the mass ratio of the Ф75mm steel rod, the Ф65mm steel rod and the Ф50mm steel rod is 4:4:

2. In step 101, the mass of the first batch of water accounts for 60% to 70% of the mass of the grinding water, and the grinding time of the first stage of grinding is 2 minutes; in step 102, the grinding time of the second stage of grinding is 2 minutes.

7. The method for applying a collector to reduce sesquioxide content in collophane according to claim 5, characterized in that, The amount of collector used in step two is 400g~800g / t of phosphate rock sample, and the pH of the flotation rough concentrate in step two is 7~9; The acidity modifier mentioned in step three is phosphoric acid and / or sulfuric acid, and the dosage of the acidity modifier is 2 kg to 6 kg / t of phosphate rock sample; The magnesium removal collector mentioned in step four is oleic acid or naphthenic acid, and the dosage of the magnesium removal collector is 100g~400g / t of phosphate rock sample.

Images