Rare earth direct flotation collector, method for preparing the same, and rare earth flotation method using the same

Abstract

The present application provides a kind of rare earth positive flotation collector and its preparation method and the rare earth flotation method using it, the rare earth positive flotation collector, including the following weight parts of component: component A: 70-100 parts of H205, 5-10 parts of 10% ammonia water and 5-10 parts of carbonamide with mass concentration;Component B: the weight parts of component A is 2-6% of the weight parts of second oil.This application provides a kind of rare earth positive flotation collector and its preparation method and the rare earth flotation method using it, the rare earth positive flotation collector has the advantages of good selectivity, strong collecting property and quick foaming, and higher rare earth ore flotation index and better economic benefits can be obtained by it.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral processing. More particularly, the present application relates to a rare earth positive flotation collector, a preparation method thereof and a rare earth flotation method using the same. BACKGROUND

[0002] Flotation is a mineral processing method that separates solid minerals from water suspension (ore pulp) according to the difference in physical and chemical properties of the mineral surface, and is most suitable for low-grade and fine-grained disseminated ores. The most commonly used treatment method for mineral-type rare earths is flotation, and the key to flotation is the use of effective collectors. In the flotation process of rare earth minerals, hydroxamic acid collectors are the most commonly used.

[0003] For example, the Chinese invention patent with publication number CN 112745245A discloses a synthesis method of aryl hydroxamic acid collector, which can effectively improve the reaction conversion rate; the Chinese invention patent with publication number CN 111013826A introduces a method for roughing flotation of micro-fine particle rare earth minerals using hydroxamic acid as a collector, which improves the recovery rate index of micro-fine particle mineral flotation; the Chinese invention patent with publication number CN 101816980A discloses a preparation method and use of a fatty hydroxamic acid collector, which has simple process, high separation efficiency and is suitable for industrial production of rare earth metal oxides. The rare earth ore positive flotation collectors introduced in the above patents all have good selectivity, low temperature resistance and other characteristics, but their collecting ability is poor, and the foaming performance is weak, which limits the index of rare earth ore flotation. SUMMARY

[0004] The present application aims to provide a rare earth positive flotation collector, a preparation method thereof and a rare earth flotation method using the same, which has the advantages of good selectivity, strong collecting ability and fast foaming, and can obtain higher rare earth ore flotation index and better economic benefits.

[0005] In order to achieve these objects and other advantages in accordance with the present application, a rare earth positive flotation collector is provided, which comprises the following components by weight:

[0006] Component A: 70-100 parts of H205, 5-10 parts of 10% ammonia water in mass concentration and 5-10 parts of carbamide;

[0007] Component B: 2-6% of No. 2 oil by weight of the weight of component A.

[0008] The present application also provides a preparation method of the above-mentioned rare earth positive flotation collector, comprising the following steps:

[0009] S1, add the ammonia water with a mass concentration of 10% of the formula part into the H205 of the formula part, continuously stir to mix and react, to obtain the saponified H205;

[0010] S2, add the carbamide of the formula part into the saponified H205 obtained in S1, stir and mix, to obtain the enhanced H205;

[0011] S3, add the No. 2 oil of the formula part into the enhanced H205 obtained in S2, after stirring and mixing, add ionized water to dilute to a mass concentration of 2-10% of the enhanced H205 and the No. 2 oil, to obtain the flotation collector.

[0012] Preferably, in the preparation method of the rare earth positive flotation collector, the continuous stirring in S1 is 5-8 minutes.

[0013] Preferably, in the preparation method of the rare earth positive flotation collector, the stirring and mixing in S2 is 8-10 minutes at 60-70℃.

[0014] Preferably, in the preparation method of the rare earth positive flotation collector, the stirring and mixing in S3 is 5-8 minutes.

[0015] The application further provides a rare earth flotation method using the above-mentioned rare earth positive flotation collector, comprising the following steps:

[0016] A, crush the rare earth ore to a particle size of 0.074mm, wherein the ore particles with a particle size of less than 0.074mm account for 60-85%;

[0017] B, perform once rough flotation on the crushed rare earth ore in step A to obtain rough concentrate and rough tailings;

[0018] In the rough flotation, the water glass is used in an amount of 400-800g / t, the rare earth positive flotation collector is used in an amount of 600-1000g / t, the pH value of the ore pulp is 8-9.5, and the mass concentration of the ore pulp is 30-40%;

[0019] C, perform twice scavenging on the rough tailings obtained in step B to obtain flotation tailings;

[0020] In the scavenging, the rare earth positive flotation collector is used in an amount of 200-300g / t;

[0021] D, perform twice clean flotation on the rough concentrate obtained in step B to obtain flotation concentrate, and take the flotation concentrate as rare earth concentrate;

[0022] In the clean flotation, the water glass is used in an amount of 100-200g / t, and the rare earth positive flotation collector is used in an amount of 200-300g / t.

[0023] Preferably, in the rare earth flotation method, the first time scavenging concentrate obtained in step C is returned to the next rough flotation feed; the second time scavenging concentrate obtained in step C is returned to the next first time scavenging feed in step C.

[0024] Preferably, in the rare earth flotation method, the first time scavenging concentrate obtained in step C is returned to the next rough flotation feed; the second time scavenging concentrate obtained in step C is returned to the next first time scavenging feed in step C.

[0025] Preferably, in the rare earth flotation method, the rough flotation time in step B is 4-6 min, and the temperature is 15-40℃; the scavenging time in step C is 1-2 min; the fine flotation time in step D is 1-2 min, and the temperature is 15-40℃.

[0026] The beneficial effects of the present application are:

[0027] 1. The rare earth direct flotation collector of the present application takes H205 as the main body, and after coupling strengthening of ammonia and carbamide, a certain amount of No. 2 oil is compounded to obtain a rare earth mineral collector with excellent selectivity, high efficient collecting capacity and good foaming property.

[0028] 2. In the rare earth flotation method of the present application, the rare earth ore direct flotation method of 1 rough 2 fine 2 scavenging through the cooperation of the rare earth direct flotation collector can obtain excellent rare earth concentrate index.

[0029] Other advantages, objects and features of the present application will be partly embodied by the following description, and partly understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Flow chart for the preparation method of the rare earth direct flotation collector described in the present application;

[0031] Figure 2 Flow chart for the rare earth flotation method using the rare earth direct flotation collector described in the present application. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description.

[0033] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Embodiments of the present invention provide a rare earth positive flotation collector, comprising the following components in parts by weight:

[0035] Component A: 70-100 parts of H2O5, 5-10 parts of 10% ammonia water and 5-10 parts of carbamide;

[0036] Component B: No. 2 oil, which is 2-6% by weight of the same amount as Component A.

[0037] H2O5 is 2-hydroxy-3-naphthylhydroxyoxime acid; No. two oil is a chemical substance with the molecular formula ROH (R-alkane group).

[0038] like Figure 1 As shown, embodiments of the present invention also provide a method for preparing the above-mentioned rare earth positive flotation collector, comprising the following steps:

[0039] S1. Add 10% ammonia water to the H2O5 in the formula and stir continuously to mix and react, so as to obtain saponified H2O5.

[0040] S2. Add the carbamide in the formula to the saponified H2O5 obtained in S1, stir and mix to obtain enhanced H2O5;

[0041] S3. Add the No. 2 oil of the formula to the enhanced H2O5 obtained in S2, stir and mix, and then add deionized water to dilute until the combined mass concentration of the enhanced H2O5 and the No. 2 oil is 2-10%, thus obtaining the flotation collector.

[0042] like Figure 2 As shown, embodiments of the present invention also provide a rare earth flotation method using the above-mentioned rare earth positive flotation collector, comprising the following steps:

[0043] A. Crush rare earth ore to a particle size of less than 0.074 mm, where the proportion of ore particles is 60-85%.

[0044] B. The rare earth ore powder after crushing in step A is subjected to rough flotation to obtain rough concentrate and rough tailings;

[0045] In the rough flotation, the water glass is used in an amount of 400-800 g / t, the rare earth positive flotation collector is used in an amount of 600-1000 g / t, the pulp pH value is 8-9.5, and the pulp mass concentration is 30-40%.

[0046] C. The rough tailings obtained in step B are subjected to two times of scavenging to obtain flotation tailings;

[0047] In the scavenging, the rare earth positive flotation collector is used in an amount of 200-300 g / t.

[0048] D. The rough concentrate obtained in step B is subjected to two times of cleaning flotation to obtain flotation concentrate, and the flotation concentrate is taken as rare earth concentrate.

[0049] In the cleaning flotation, the water glass is used in an amount of 100-200 g / t, and the rare earth positive flotation collector is used in an amount of 200-300 g / t.

[0050] In step C, the scavenging concentrate obtained by the first time of scavenging is returned to the feed of the next rough flotation, and the scavenging concentrate obtained by the second time of scavenging is returned to the feed of the first time of scavenging in step C. In step D, the tailings obtained by the first time of cleaning flotation are returned to the feed of the next rough flotation, and the tailings obtained by the second time of cleaning flotation are returned to the feed of the first time of cleaning flotation in step D.

[0051] In step B, the rough flotation is performed for 4-6 min at a temperature of 15-40℃; in step C, the scavenging is performed for 1-2 min; and in step D, the cleaning flotation is performed for 1-2 min at a temperature of 15-40℃.

[0052] In order to prove the beneficial effects of the rare earth positive flotation collector, the preparation method thereof and the rare earth flotation method using the same, the following examples are provided for verification:

[0053] In the following examples, the synthetic raw material H205, ammonia water and carbamide are all commercially available analytical pure; the synthetic raw material No. 2 oil is a commercially available industrial product; the rare earth positive flotation collector synthesis device is a commercially available hydrothermal reaction kettle device; the flotation is performed by using a commercially available mechanical stirring type flotation machine; the flotation pH adjuster is commercially available NaOH and HCl analytical pure; and the rare earth ore is fluorocarbon cerite with a REO grade of 0.5-6%.

[0054] <Example 1>

[0055] A rare earth positive flotation collector, comprising the following components in parts by weight:

[0056] A component: 100 parts of H205, 5 parts of 10% ammonia water and 5 parts of carbamide;

[0057] B component: 2% of No. 2 oil by weight of the weight of the A component.

[0058] The preparation method of the above-mentioned rare earth positive flotation collector comprises the following steps:

[0059] As Figure 1 shown, the embodiment of the present application also provides a preparation method of the above-mentioned rare earth positive flotation collector, comprising the following steps:

[0060] S1, adding formula parts of 10% ammonia water to formula parts of H205, continuously stirring for 5 minutes to make it mixed and reacted, to obtain saponified H205;

[0061] S2, adding formula parts of carbamide to the saponified H205 obtained in S1, stirring and mixing for 5 minutes to obtain enhanced H205;

[0062] S3, adding formula parts of No. 2 oil to the enhanced H205 obtained in S2, stirring and mixing for 5 minutes, and then diluting with ionized water to a mass concentration of 4% of the enhanced H205 and No. 2 oil, to obtain the flotation collector.

[0063] The rare earth flotation method using the above-mentioned rare earth positive flotation collector comprises the following steps:

[0064] A, crushing the rare earth ore to a particle size of less than 0.074 mm, accounting for 70% of the total;

[0065] B, performing one rough flotation on the crushed rare earth ore in step A to obtain rough concentrate and rough tailings;

[0066] Wherein, during the rough flotation, the dosage of water glass is 400g / t, the dosage of the rare earth positive flotation collector is 700g / t, the pH value of the ore pulp is 9, and the mass concentration of the ore pulp is 40%;

[0067] C, performing two scavenging on the rough tailings obtained in step B to obtain flotation tailings;

[0068] Wherein, during the scavenging, the dosage of the rare earth positive flotation collector is 300g / t

[0069] D, performing two clean flotation on the rough concentrate obtained in step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;

[0070] Wherein, during the clean flotation, the dosage of water glass is 100g / t, and the dosage of the rare earth positive flotation collector is 300g / t.

[0071] The sweep concentrate obtained in the first sweeping in step C is returned to the feed of the next rough flotation; the sweep concentrate obtained in the second sweeping in step C is returned to the feed of the first sweeping in step C in the next time. The tailings obtained in the first fine flotation in step D are returned to the feed of the next rough flotation; the tailings obtained in the second fine flotation in step D are returned to the feed of the first fine flotation in step D in the next time.

[0072] The rough flotation in step B is performed for 6 min at 40 DEG C; the sweeping in step C is performed for 2 min; the fine flotation in step D is performed for 2 min at -40 DEG C.

[0073] The rare earth ore used in the example is from Zhushan area in Hubei province; the composition is shown in Table 1 (weight percentage) ;

[0074] Table 1 Chemical multi-element analysis of Example 1

[0075] Ingredients REO [Nb2O5] TFe TiO2 SiO2 Al2O3 CaO K2O Na2O MgO Content / % 2.34 0.11 6.31 1.66 39.80 10.00 8.61 4.98 0.38 1.60

[0076] The separation indexes of the rare earth flotation method using the above-mentioned rare earth direct flotation collector are as follows:

[0077] Table 2 Separation indexes of Example 1

[0078]

[0079] <Example 2>

[0080] A rare earth direct flotation collector, comprising the following components in parts by weight:

[0081] The component A: 100 parts of H205, 5 parts of ammonia water with a mass concentration of 10%, and 5 parts of carbamide;

[0082] The component B: 2% of the component A in parts by weight of the component A.

[0083] The preparation method of the above-mentioned rare earth direct flotation collector, comprising the following steps:

[0084] S1, adding the component B in parts by weight of the component A into the component A in parts by weight of H205, continuously stirring to mix and react, to obtain the saponified H205;

[0085] S2, adding the component C in parts by weight of the component A into the saponified H205 obtained in S1, stirring and mixing, to obtain the enhanced H205;

[0086] S3, adding the component B in parts by weight of the component A into the enhanced H205 obtained in S2, stirring and mixing, and then diluting with ionized water to a mass concentration of 4% of the enhanced H205 and the component B, to obtain the flotation collector.

[0087] The rare earth flotation method using the above rare earth positive flotation collector comprises the following steps:

[0088] A, crushing the rare earth ore to 60% of the ore particles with a particle size less than 0.074 mm;

[0089] B, performing one rough flotation on the crushed rare earth ore in step A to obtain rough concentrate and rough tailings;

[0090] Wherein, during the rough flotation, the dosage of water glass is 400 g / t, the dosage of the rare earth positive flotation collector is 600 g / t, the pulp pH value is 9, and the pulp mass concentration is 40%;

[0091] C, performing two cleanings on the rough tailings obtained in step B to obtain flotation tailings;

[0092] Wherein, during the cleaning, the dosage of the rare earth positive flotation collector is 200 g / t

[0093] D, performing two cleanings on the rough concentrate obtained in step B to obtain flotation concentrate, and taking the flotation concentrate as the rare earth concentrate;

[0094] Wherein, during the cleaning, the dosage of water glass is 100 g / t, and the dosage of the rare earth positive flotation collector is 200 g / t.

[0095] Wherein, the cleaning concentrate obtained in the first cleaning in step C is returned to the rough flotation feedstock in the next step; the cleaning concentrate obtained in the second cleaning in step C is returned to the feedstock of the first cleaning in step C in the next step. The tailings obtained in the first cleaning in step D are returned to the rough flotation feedstock in the next step; the tailings obtained in the second cleaning in step D are returned to the feedstock of the first cleaning in step D in the next step.

[0096] Wherein, the rough flotation time in step B is 5 min, and the temperature is 35℃; the cleaning time in step C is 2 min; the cleaning time in step D is 2 min, and the temperature is 35℃.

[0097] The rare earth ore used in the embodiment is from Zhushan area in Hubei; the composition is shown in Table 1 (weight percentage);

[0098] Table 3 Chemical multi-element analysis of Example 2

[0099] Ingredients REO CaF2 CaCO3 CaO SiO2 Al2O3 MgO SrSO4 Content / % 3.78 1.31 31.50 18.65 24.50 4.40 0.81 7.79

[0100] The separation indexes of the rare earth flotation method using the above rare earth positive flotation collector are as follows:

[0101] Table 4 Separation indexes of Example 2

[0102]

[0103] <Embodiment 3>

[0104] A rare earth positive flotation collector, comprising the following components by weight:

[0105] A component: 100 parts of H205, 10 parts of 10% ammonia water by mass concentration and 10 parts of carbamide;

[0106] B component: 4% of No. 2 oil by weight of the weight of the A component.

[0107] The preparation method of the above-mentioned rare earth positive flotation collector, comprising the following steps:

[0108] S1, adding formula parts of 10% ammonia water by mass concentration to formula parts of H205, continuously stirring for 8 minutes to mix and react, to obtain saponified H205;

[0109] S2, adding formula parts of carbamide to the saponified H205 obtained in S1, stirring and mixing for 8 minutes to obtain enhanced H205;

[0110] S3, adding formula parts of No. 2 oil to the enhanced H205 obtained in S2, stirring and mixing for 8 minutes, and then diluting with ionized water to a mass concentration of 2-10% of the enhanced H205 and No. 2 oil, to obtain the flotation collector.

[0111] The rare earth flotation method using the above-mentioned rare earth positive flotation collector, comprising the following steps:

[0112] A, crushing the rare earth ore to a particle size of less than 0.074 mm, accounting for 70% of the total;

[0113] B, performing one rough flotation on the crushed rare earth ore in step A to obtain rough concentrate and rough tailings;

[0114] Wherein, during rough flotation, the dosage of water glass is 400g / t, the dosage of rare earth positive flotation collector is 700g / t, the pH value of the ore pulp is 9, and the mass concentration of the ore pulp is 40%;

[0115] C, performing two scavenging on the rough tailings obtained in step B to obtain flotation tailings;

[0116] Wherein, during scavenging, the dosage of rare earth positive flotation collector is 300g / t

[0117] D, performing two clean flotation on the rough concentrate obtained in step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;

[0118] Wherein, during clean flotation, the dosage of water glass is 100g / t, and the dosage of rare earth positive flotation collector is 300g / t.

[0119] The sweep concentrate obtained in the first sweeping in step C is returned to the feed of the next rough flotation; the sweep concentrate obtained in the second sweeping in step C is returned to the feed of the first sweeping in step C in the next time. The tailings obtained in the first fine flotation in step D are returned to the feed of the next rough flotation; the tailings obtained in the second fine flotation in step D are returned to the feed of the first fine flotation in step D in the next time.

[0120] The rough flotation in step B is performed for 6 min at 40℃; the sweeping in step C is performed for 2 min; the fine flotation in step D is performed for 2 min at 40℃.

[0121] The rare earth ore used in the example is from Zhushan area in Hubei province; the composition is shown in Table 1 (weight percentage) ;

[0122] Table 5 Chemical multi-element analysis of Example 1

[0123] Ingredients REO [Nb2O5] TFe TiO2 SiO2 Al2O3 CaO K2O Na2O MgO Content / % 2.34 0.11 6.31 1.66 39.80 10.00 8.61 4.98 0.38 1.60

[0124] The separation indexes of the rare earth flotation method using the above-mentioned rare earth direct flotation collector are as follows:

[0125] Table 6 Separation indexes of Example 3

[0126]

[0127] <Example 4>

[0128] A rare earth direct flotation collector, comprising the following components in parts by weight:

[0129] The component A: 70-100 parts of H205, 5-10 parts of ammonia water with a mass concentration of 10%, and 5-10 parts of carbamide;

[0130] The component B: 2-6% of the second oil in parts by weight of the component A.

[0131] The preparation method of the above-mentioned rare earth direct flotation collector, comprising the following steps:

[0132] S1, adding the formula parts of ammonia water with a mass concentration of 10% into the formula parts of H205, continuously stirring to mix and react, to obtain the saponified H205;

[0133] S2, adding the formula parts of carbamide into the saponified H205 obtained in S1, stirring and mixing, to obtain the enhanced H205;

[0134] S3, adding the formula parts of the second oil into the enhanced H205 obtained in S2, stirring and mixing, and then diluting with ionized water to a mass concentration of 2-10% of the enhanced H205 and the second oil, to obtain the flotation collector.

[0135] The rare earth flotation method using the rare earth positive flotation collector comprises the following steps:

[0136] A. crushing the rare earth ore to a particle size of 0.074 mm, wherein the proportion of the ore particles is 60-85%;

[0137] B. performing once rough flotation on the crushed rare earth ore in step A to obtain rough concentrate and rough tailings;

[0138] In the rough flotation, the dosage of water glass is 400-800 g / t, the dosage of the rare earth positive flotation collector is 600-1000 g / t, the pH value of the ore pulp is 8-9.5, and the mass concentration of the ore pulp is 30-40%;

[0139] C. performing twice scavenging on the rough tailings obtained in step B to obtain flotation tailings;

[0140] In the scavenging, the dosage of the rare earth positive flotation collector is 200-300 g / t;

[0141] D. performing twice clean flotation on the rough concentrate obtained in step B to obtain flotation concentrate, and taking the flotation concentrate as the rare earth concentrate;

[0142] In the clean flotation, the dosage of water glass is 100-200 g / t, and the dosage of the rare earth positive flotation collector is 200-300 g / t.

[0143] In step C, the scavenging concentrate obtained by the first scavenging is returned to the rough flotation feed of the next time, and the scavenging concentrate obtained by the second scavenging is returned to the feed of the first scavenging in step C of the next time. In step D, the tailings obtained by the first clean flotation are returned to the rough flotation feed of the next time, and the tailings obtained by the second clean flotation are returned to the feed of the first clean flotation in step D of the next time.

[0144] In step B, the rough flotation time is 4-6 min, and the temperature is 15-40℃; in step C, the scavenging time is 1-2 min; and in step D, the clean flotation time is 1-2 min, and the temperature is 15-40℃.

[0145] The rare earth ore used in the embodiment is from Zhushan area in Hubei Province, and the composition is shown in Table 1 (weight percentage);

[0146] Table 7 Chemical multi-element analysis of Example 4

[0147] Ingredients REO [Nb2O5] TFe TiO2 SiO2 Al2O3 CaO K2O Na2O MgO Content / % 2.34 0.11 6.31 1.66 39.80 10.00 8.61 4.98 0.38 1.60

[0148] The separation indexes of the rare earth flotation method using the rare earth positive flotation collector are as follows:

[0149] Table 8 Sorting index of Example 3

[0150]

[0151] It can be seen from the above Examples 1-4 that the rare earth positive flotation collector of the present application has obvious enrichment effect on rare earth ore; it can be seen from Examples 1 and 2 that the rare earth positive flotation collector of the present application has certain effect on minerals in different regions, and has universality; it can be seen from Examples 1 and 3, 4 that appropriately increasing the proportion of ammonia water and carbamide can enhance the flotation performance of the rare earth positive flotation collector, and has good recovery effect on fine-grained fluorocarbon cerium ore.

[0152] Although the embodiments of the present application have been disclosed as above, it is not limited to the use listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and other modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the examples shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A rare earth positive flotation collector, characterized in that, The components include the following weight parts: The component A: 70-100 parts of H205, 5-10 parts of ammonia water with a mass concentration of 10%, and 5-10 parts of carbamide; wherein, the H205 is 2-hydroxy-3-naphthalene hydroxamic acid; The component B: 2-6% of the second oil by weight parts of the component A.

2. A process for the preparation of the rare earth positive flotation collector as claimed in claim 1, characterized in that, The steps include the following: S1, adding the formula part of ammonia water with a mass concentration of 10% into the formula part of H205, continuously stirring to mix and react, to obtain the saponified H205; S2, adding the formula part of carbamide into the saponified H205 obtained in S1, stirring and mixing, to obtain the enhanced H205; S3, adding the formula part of the second oil into the enhanced H205 obtained in S2, stirring and mixing, and then adding ionized water to dilute to a mass concentration of 2-10% of the enhanced H205 and the second oil, to obtain the flotation collector.

3. The preparation method of the rare earth positive flotation collector as described in claim 2, characterized in that, The continuous stirring in S1 is for 5-8 minutes.

4. The preparation method of the rare earth positive flotation collector as described in claim 2, characterized in that, The stirring and mixing in S2 is for 8-10 minutes at 60-70℃.

5. The preparation method of the rare earth positive flotation collector as described in claim 2, characterized in that, The stirring and mixing in S3 is for 5-8 minutes.

6. A rare earth flotation process using the rare earth positive flotation collector according to claim 1, characterized by, The steps include the following: A, crushing the rare earth ore to a particle size of 60-85% of the ore particles with a particle size less than 0.074 mm; B, performing once rough flotation on the crushed rare earth ore in step A to obtain rough concentrate and rough tailings; Wherein, the water glass dosage is 400-800g / t, the rare earth positive flotation collector dosage is 600-1000g / t, the pulp pH value is 8-9.5, and the pulp mass concentration is 30-40% during rough flotation; C, performing twice scavenging on the rough tailings obtained in step B to obtain flotation tailings; Wherein, the rare earth positive flotation collector dosage is 200-300g / t during scavenging; D, performing twice clean flotation on the rough concentrate obtained in step B to obtain flotation concentrate, and taking the flotation concentrate as the rare earth concentrate; Wherein, the water glass dosage is 100-200g / t, and the rare earth positive flotation collector dosage is 200-300g / t during clean flotation.

7. A rare earth flotation process as claimed in claim 6, characterised in that, The scavenging concentrate obtained in the first scavenging in step C is returned to the feed of the next rough flotation; the scavenging concentrate obtained in the second scavenging in step C is returned to the feed of the first scavenging in step C.

8. A rare earth flotation process as claimed in claim 6, characterised in that, The tailings obtained in the first clean flotation in step D are returned to the feed of the next rough flotation; the tailings obtained in the second clean flotation in step D are returned to the feed of the first clean flotation in step D.

9. A rare earth flotation process as claimed in claim 6, characterised in that, The rough flotation time in step B is 4-6min, and the temperature is 15-40℃; the scavenging time in step C is 1-2min; the clean flotation time in step D is 1-2min, and the temperature is 15-40℃.

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