CN119303735A - Composite collector for positive flotation of mineral-type rare earth ore, preparation method and flotation method - Google Patents
Composite collector for positive flotation of mineral-type rare earth ore, preparation method and flotation method Download PDFInfo
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- CN119303735A CN119303735A CN202411374429.7A CN202411374429A CN119303735A CN 119303735 A CN119303735 A CN 119303735A CN 202411374429 A CN202411374429 A CN 202411374429A CN 119303735 A CN119303735 A CN 119303735A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a mineral type rare earth ore forward flotation composite collector, a preparation method and a flotation method, wherein the mineral type rare earth ore forward flotation composite collector comprises fatty acid, fatty alcohol and sodium hydroxide solution, wherein the mass ratio of the fatty acid to the fatty alcohol is 10:1, the mass concentration of the sodium hydroxide solution is 10-20%, and the mass of the sodium hydroxide solution is equal to the mass sum of the fatty acid and the fatty alcohol. The invention provides a mineral type rare earth ore forward flotation composite collector, a preparation method and a flotation method, and the mineral type rare earth ore forward flotation composite collector has the advantages of simple process, strong selectivity, high collection performance, good dispersibility and environmental protection and low cost, is used for separating micro-fine mineral type rare earth ores, and can obtain flotation indexes with high grade and high recovery rate.
Description
Technical Field
The present invention relates to the field of mineral processing. More particularly, the invention relates to a mineral type rare earth ore forward flotation composite collector, a preparation method and a flotation method.
Background
Rare earth ore deposit types in China are divided into weathered rare earth ore and mineral type rare earth ore, and mineral type rare earth ore mainly adopts mineral separation and extraction methods such as gravity separation, magnetic separation, floatation and the like. Froth flotation can treat fine-grained minerals, and thus the technique is widely applied to mineral-type rare earth ores. The key of the froth flotation method is selection of a flotation collector, and common collectors of rare earth ores are carboxylic acid type collectors, hydroxamic acid type collectors and phosphoric acid type collectors. The fatty acid collector is the collector which is applied to rare earth flotation at the earliest, but the traditional fatty acid collector has the defects of poor adaptability, poor dispersibility, low selectivity and the like, and in mineral flotation, other agents are often combined with the fatty acid collector to improve the flotation effect.
For example, the Chinese patent publication No. CN112474064A discloses a preparation and use method of a compound collector for complex rare earth ore flotation, and the problem that ore pulp needs to be heated during traditional agent flotation is avoided by using a hydroxamic acid collector, a fatty acid collector, a phosphonic acid compound and other combined collectors in the patent publication. The invention patent with the publication number of CN117046614A discloses a rare earth ore positive flotation combined collector, a preparation method and a flotation method using the same, wherein chlorinated fatty acid is used as a raw material, and hydroxamic acid is compounded to form the rare earth ore positive flotation combined collector. The Chinese patent publication No. CN112246441A discloses a flotation composite collector, a preparation method and application thereof, and the invention provides a composite collector prepared from peroxide and hydroxylamine salt serving as raw materials and containing hydroxamic acid compounds and alcohol, so that the synergistic collecting effect among various flotation agents is realized, and the composite collector has the defects of complex process flow, long time consumption and high agent price.
Disclosure of Invention
The invention aims to provide a mineral type rare earth ore forward flotation composite collector, a preparation method and a flotation method, wherein the mineral type rare earth ore forward flotation composite collector has the advantages of simple process, strong selectivity, high collection performance, good dispersibility and environmental protection and low cost, is used for separating micro-fine mineral type rare earth ores, and can obtain flotation indexes with high grade and high recovery rate.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a mineral type rare earth ore positive flotation composite collector comprising the following components:
fatty acids, fatty alcohols and sodium hydroxide solution;
Wherein the mass ratio of the fatty acid to the fatty alcohol is 10:1, the mass concentration of the sodium hydroxide solution is 10-20%, and the mass is equal to the sum of the mass of the fatty acid and the fatty alcohol.
Preferably, in the mineral type rare earth ore positive flotation composite collector, the fatty acid is C8-C18 fatty acid, and the fatty alcohol is C10-C16 fatty alcohol.
The invention also provides a preparation method of the mineral type rare earth ore positive flotation composite collector, which comprises the following steps:
s1, melting fatty acid and fatty alcohol;
S2, mixing the melted fatty acid and fatty alcohol in the S1 according to a mass ratio of 10:1, and continuously stirring and uniformly mixing to obtain a mixture;
S3, adding 10-20% sodium hydroxide solution with the mass concentration equal to that of the mixture in the step S2, stirring and saponifying to obtain a prefabricated product;
S4, adding deionized water into the prefabricated product obtained in the step S3, and diluting until the mass concentration of the prefabricated product is 2-10%, thus obtaining the mineral type rare earth ore positive flotation composite collector.
Preferably, in the preparation method of the mineral type rare earth ore positive flotation composite collector, the fatty acid and the fatty alcohol in S1 are melted at the temperature of 50-70 ℃.
Preferably, in the preparation method of the mineral type rare earth ore forward flotation composite collector, when the melted fatty acid and fatty alcohol in the S2 are mixed, the continuous stirring time is 5-6 minutes.
Preferably, in the preparation method of the mineral type rare earth ore forward flotation composite collector, the stirring saponification time in the step S3 is 5-10 minutes.
The invention also provides a rare earth flotation method, which adopts the mineral type rare earth ore positive flotation composite collector and comprises the following steps:
A. Crushing rare earth ore to a mineral grain with the grain diameter smaller than 0.074mm accounting for 65-85 percent;
B. c, carrying out primary rough flotation on the rare earth mineral powder crushed in the step A to obtain rough concentrate and rough tailings;
Wherein, during coarse flotation, the consumption of water glass is 400-800g/t, the consumption of the positive flotation composite collector is 600-1000g/t, the pH value of ore pulp is 4-5.5, and the mass concentration of ore pulp is 30-40%;
C. b, scavenging the rougher tailings obtained in the step B for two times to obtain flotation tailings;
Wherein the dosage of the positive flotation composite collector is 200-300g/t during scavenging;
D. Performing tertiary fine flotation on the rough concentrate obtained in the step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;
Wherein, the dosage of the water glass is 100-200g/t and the dosage of the positive flotation composite collector is 200-300g/t during the fine flotation.
In the rare earth flotation method, the scavenging concentrate obtained by the first scavenging in the step C is returned to the coarse flotation ore feeding of the next time, and the scavenging concentrate obtained by the second scavenging in the step C is returned to the ore feeding of the first scavenging in the next step C.
Preferably, in the rare earth flotation method, tailings obtained by the first fine flotation in the step D are returned to coarse flotation feeding of the next time, tailings obtained by the second fine flotation in the step D are returned to first fine flotation feeding of the next time, and tailings obtained by the third fine flotation in the step D are returned to second fine flotation feeding of the next time.
Preferably, in the rare earth flotation method, the rough flotation time in the step B is 4-6min, the temperature is 20-55 ℃, the scavenging time in the step C is 1-2min, the fine flotation time in the step D is 1-2min, and the temperature is 20-55 ℃.
The beneficial effects of the invention are as follows:
1. the mineral type rare earth ore positive flotation composite collector is prepared by taking fatty acid as a raw material and compounding a certain amount of fatty alcohol, and the natural fatty acid has the advantages of low cost and easy purchase, so that the cost of the mineral type rare earth ore positive flotation composite collector is obviously reduced compared with that of industrial collectors such as H205, salicylic hydroxamic acid and the like.
2. Compared with a single flotation collector, the mineral type rare earth ore positive flotation composite collector has the characteristics of high selectivity, strong collection property, low toxicity, good foamability, easy degradation and the like, and can be suitable for rare earth flotation under normal temperature conditions.
3. According to the rare earth flotation method, the mineral type rare earth ore positive flotation composite collector is adopted, and the 1 coarse and 3 fine 2-sweep rare earth flotation process is matched, so that the rare earth concentrate index with high grade and high recovery rate can be obtained, the loss of rare earth minerals in tailings is reduced, and the economic benefit is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a flow chart of a rare earth flotation process according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
It should be noted that, in the following embodiments, unless otherwise specified, the experimental methods are conventional methods, and the reagents and materials are commercially available, unless otherwise specified, and in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The embodiment of the invention provides a mineral type rare earth ore positive flotation composite collector, which comprises the following components:
C8-C18 fatty acids, C10-C16 fatty alcohols and sodium hydroxide solution.
Wherein the mass ratio of the fatty acid to the fatty alcohol is 10:1, the mass concentration of the sodium hydroxide solution is 10-20%, and the mass is equal to the sum of the mass of the fatty acid and the fatty alcohol.
The embodiment of the invention also provides a preparation method of the mineral type rare earth ore positive flotation composite collector, which comprises the following steps:
s1, melting fatty acid and fatty alcohol;
S2, mixing the melted fatty acid and fatty alcohol in the S1 according to a mass ratio of 10:1, and continuously stirring and uniformly mixing to obtain a mixture;
S3, adding 10-20% sodium hydroxide solution with the mass concentration equal to that of the mixture in the step S2, stirring and saponifying to obtain a prefabricated product;
S4, adding deionized water into the prefabricated product obtained in the step S3, and diluting until the mass concentration of the prefabricated product is 2-10%, thus obtaining the mineral type rare earth ore positive flotation composite collector.
In the preparation method of the mineral type rare earth ore forward flotation composite collector, fatty acid and fatty alcohol in S1 are melted at the temperature of 50-70 ℃.
Wherein, when the melted fatty acid and fatty alcohol in S2 are mixed, the continuous stirring time is 5-6 minutes.
Wherein the stirring saponification time in S3 is 5-10 minutes.
As shown in fig. 1, the embodiment of the invention also provides a rare earth flotation method, which adopts the mineral type rare earth ore positive flotation composite collector, and comprises the following steps:
A. Crushing rare earth ore to a mineral grain with the grain diameter smaller than 0.074mm accounting for 65-85 percent;
B. c, carrying out primary rough flotation on the rare earth mineral powder crushed in the step A to obtain rough concentrate and rough tailings;
Wherein, during coarse flotation, the consumption of water glass is 400-800g/t, the consumption of the positive flotation composite collector is 600-1000g/t, the pH value of ore pulp is 4-5.5, and the mass concentration of ore pulp is 30-40%;
C. b, scavenging the rougher tailings obtained in the step B for two times to obtain flotation tailings;
Wherein the dosage of the positive flotation composite collector is 200-300g/t during scavenging;
D. Performing tertiary fine flotation on the rough concentrate obtained in the step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;
Wherein, the dosage of the water glass is 100-200g/t and the dosage of the positive flotation composite collector is 200-300g/t during the fine flotation.
In the rare earth flotation method, the scavenging concentrate obtained by the first scavenging in the step C is returned to the coarse flotation ore feeding of the next time, and the scavenging concentrate obtained by the second scavenging in the step C is returned to the ore feeding of the first scavenging in the next time.
In the rare earth flotation method, tailings obtained by the first fine flotation in the step D are returned to the coarse flotation ore feeding of the next time, tailings obtained by the second fine flotation in the step D are returned to the first fine flotation ore feeding of the next time, and tailings obtained by the third fine flotation in the step D are returned to the second fine flotation ore feeding of the next time.
In the rare earth flotation method, the rough flotation time in the step B is 4-6min, the temperature is 20-55 ℃, the scavenging time in the step C is 1-2min, the fine flotation time in the step D is 1-2min, and the temperature is 20-55 ℃.
In order to prove the beneficial effects of the mineral type rare earth ore forward flotation composite collector, the preparation method thereof and the rare earth flotation method using the same, the following examples are specially carried out for verification:
Wherein, in the following examples, the fatty acid, fatty alcohol and sodium hydroxide are all commercially available analytical pure, the flotation adopts a commercially available mechanical stirring type flotation machine, the flotation pH regulator adopts commercially available NaOH and HCl analytical pure, and the rare earth ore is bastnaesite with REO grade of 1-3%.
Example 1]
The ore dressing stone raw material of the embodiment is bastnaesite rare earth ore in Sichuan, the rare earth ore mainly comprises gangue minerals such as barite, fluorite, quartz and the like, the main rare earth mineral is bastnaesite, and the REO grade is only 2.34 percent.
The fatty acid in the raw material of the composite collector used in the embodiment is lauric acid, which is a saturated fatty acid, also called dodecanoic acid, and has a chemical formula of C 12H24O2, and the fatty alcohol is lauryl alcohol, also called dodecanol, and has a chemical formula of C 12H26 O. Wherein the mass ratio of lauric acid to lauryl alcohol is 10:1, the mass concentration of the sodium hydroxide solution is 20%, and the ratio of the mass of the sodium hydroxide solution to the sum of the mass of lauric acid and the mass of lauryl alcohol is 1:1.
The preparation method of the positive flotation composite collector comprises the following steps:
s1, melting lauric acid and lauryl alcohol;
s2, mixing lauric acid and lauryl alcohol obtained in the step S1 according to the mass ratio of 10:1, and continuously stirring and uniformly mixing to obtain a mixture medicament solution;
s3, adding a sodium hydroxide solution with the mass concentration of 20% which is equal to the total mass of lauric acid and lauryl alcohol into the mixture medicament solution in the S2, stirring and saponifying for 7 minutes, and thus obtaining a prefabricated product;
And S4, adding deionized water to dilute the prefabricated product in the step S3 to a medicament solution with the mass concentration of 2%, so as to obtain the mineral type rare earth ore positive flotation composite collector.
The rare earth flotation method adopting the composite collector comprises the following steps of:
A. crushing rare earth ores until the ore grains with the grain diameter smaller than 0.074mm account for 70 percent;
B. c, carrying out primary rough flotation on the rare earth mineral powder crushed in the step A to obtain rough concentrate and rough tailings;
the water glass dosage is 400g/t during coarse flotation, the dosage of the positive flotation composite collector is 500g/t, the pH value of ore pulp is 4.5, and the mass concentration of ore pulp is 40%;
C. b, scavenging the rougher tailings obtained in the step B for two times to obtain flotation tailings;
Wherein the dosage of the positive flotation composite collector is 200g/t during scavenging;
D. Performing tertiary fine flotation on the rough concentrate obtained in the step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;
Wherein, during fine flotation, the dosage of the water glass is 100g/t, and the dosage of the positive flotation composite collector is 200g/t.
The scavenging concentrate obtained by the first scavenging in the step C is returned to the coarse flotation ore feeding of the next time, and the scavenging concentrate obtained by the second scavenging in the step C is returned to the ore feeding of the first scavenging in the next step C.
The tailings obtained by the first fine flotation in the step D are returned to the coarse flotation feeding of the next time, the tailings obtained by the second fine flotation in the step D are returned to the first fine flotation feeding of the next time in the step D, and the tailings obtained by the third fine flotation in the step D are returned to the second fine flotation feeding of the next time in the step D.
Wherein the time of coarse flotation in the step B is 4min, the temperature is 25 ℃, the time of scavenging in the step C is 2min, the time of fine flotation in the step D is 2min, and the temperature is 25 ℃.
The separation indexes of the rare earth flotation method adopting the composite collector are as follows:
table 1 example 1 sorting index
Example 2]
The ore dressing stone raw material of the embodiment is bastnaesite rare earth ore in Sichuan, the rare earth ore mainly comprises gangue minerals such as barite, fluorite, quartz and the like, the main rare earth mineral is bastnaesite, and the REO grade is only 2.34 percent.
The collector used in this example was different from that of example 1 in that laurinol was added in an amount of 0 as a single collector component of lauric acid, sodium hydroxide solution. Wherein the mass concentration of the sodium hydroxide solution is 20%, and the ratio of the mass of the sodium hydroxide solution to the mass of the lauric acid is 1:1.
The preparation method of the single collector comprises the following steps:
S1, melting lauric acid;
s2, adding a sodium hydroxide solution with the mass concentration of 20% which is equal to that of lauric acid into the lauric acid solution, stirring and saponifying for 7 minutes to obtain a prefabricated product;
And S3, adding deionized water to dilute the prefabricated product in the step S2 to a reagent solution with the mass concentration of 2%, and thus obtaining the single collector.
The rare earth flotation method adopting the single collector comprises the following steps:
A. crushing rare earth ores until the ore grains with the grain diameter smaller than 0.074mm account for 70 percent;
B. c, carrying out primary rough flotation on the rare earth mineral powder crushed in the step A to obtain rough concentrate and rough tailings;
the water glass dosage is 400g/t during coarse flotation, the dosage of the positive flotation composite collector is 600g/t, the pH value of ore pulp is 4.5, and the mass concentration of ore pulp is 40%;
C. b, scavenging the rougher tailings obtained in the step B for two times to obtain flotation tailings;
wherein the dosage of the positive flotation composite collector is 300g/t during scavenging;
D. Performing tertiary fine flotation on the rough concentrate obtained in the step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;
wherein, during fine flotation, the dosage of the water glass is 200g/t, and the dosage of the positive flotation composite collector is 300g/t.
The scavenging concentrate obtained by the first scavenging in the step C is returned to the coarse flotation ore feeding of the next time, and the scavenging concentrate obtained by the second scavenging in the step C is returned to the ore feeding of the first scavenging in the next step C.
The tailings obtained by the first fine flotation in the step D are returned to the coarse flotation feeding of the next time, the tailings obtained by the second fine flotation in the step D are returned to the first fine flotation feeding of the next time in the step D, and the tailings obtained by the third fine flotation in the step D are returned to the second fine flotation feeding of the next time in the step D.
Wherein the time of coarse flotation in the step B is 4min, the temperature is 45 ℃, the time of scavenging in the step C is 2min, the time of fine flotation in the step D is 2min, and the temperature is 45 ℃.
The separation indexes of the rare earth flotation method adopting the single collector are as follows:
table 2 example 2 sorting index
Example 3 ]
The ore dressing stone raw material of the embodiment is bastnaesite rare earth ore in Sichuan, the rare earth ore mainly comprises gangue minerals such as barite, fluorite, quartz and the like, the main rare earth mineral is bastnaesite, and the REO grade is only 2.34 percent.
The composite collector used in this example is different from that of example 1 in that the fatty acid in the raw material is palmitic acid, which is a saturated fatty acid, also called palmitic acid, and has a chemical formula of C 16H32O2. Wherein the mass ratio of the palmitic acid to the lauryl alcohol is 10:1, the mass concentration of the sodium hydroxide solution is 20%, and the mass ratio of the palmitic acid to the sum of the lauryl alcohol is 1:1.
The preparation method of the positive flotation composite collector comprises the following steps:
s1, melting palmitic acid and lauryl alcohol;
s2, mixing the palmitic acid and the lauryl alcohol obtained in the step S1 according to the mass ratio of 10:1, and continuously stirring and uniformly mixing to obtain a mixture medicament solution;
S3, adding a sodium hydroxide solution with the mass concentration of 20% which is equal to the total mass of the palmitic acid and the lauryl alcohol into the mixture medicament solution in the S2, stirring and saponifying for 7 minutes, and thus obtaining a prefabricated product;
And S4, adding deionized water to dilute the prefabricated product in the step S3 to a medicament solution with the mass concentration of 2%, so as to obtain the mineral type rare earth ore positive flotation composite collector.
The rare earth flotation method adopting the composite collector comprises the following steps of:
A. crushing rare earth ores until the ore grains with the grain diameter smaller than 0.074mm account for 70 percent;
B. c, carrying out primary rough flotation on the rare earth mineral powder crushed in the step A to obtain rough concentrate and rough tailings;
the water glass dosage is 400g/t during coarse flotation, the dosage of the positive flotation composite collector is 500g/t, the pH value of ore pulp is 4.5, and the mass concentration of ore pulp is 40%;
C. b, scavenging the rougher tailings obtained in the step B for two times to obtain flotation tailings;
Wherein the dosage of the positive flotation composite collector is 200g/t during scavenging;
D. Performing tertiary fine flotation on the rough concentrate obtained in the step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;
Wherein, during fine flotation, the dosage of the water glass is 100g/t, and the dosage of the positive flotation composite collector is 200g/t.
The scavenging concentrate obtained by the first scavenging in the step C is returned to the coarse flotation ore feeding of the next time, and the scavenging concentrate obtained by the second scavenging in the step C is returned to the ore feeding of the first scavenging in the next step C.
The tailings obtained by the first fine flotation in the step D are returned to the coarse flotation feeding of the next time, the tailings obtained by the second fine flotation in the step D are returned to the first fine flotation feeding of the next time in the step D, and the tailings obtained by the third fine flotation in the step D are returned to the second fine flotation feeding of the next time in the step D.
Wherein the time of coarse flotation in the step B is 4min, the temperature is 25 ℃, the time of scavenging in the step C is 2min, the time of fine flotation in the step D is 2min, and the temperature is 25 ℃.
The separation indexes of the rare earth flotation method adopting the composite collector are as follows:
TABLE 3 example 3 sorting index
As can be seen from the comparison of the above examples 1 and 2, the lauric acid and lauryl alcohol composite collector described in the invention has significantly higher flotation performance than that of a single lauric acid collector, and the REO grade and recovery rate of the obtained rare earth ore flotation product are respectively higher than those of 5.7 percent and 10.37 percent. Comparison of examples 1 and 3 shows that there is a slight difference in the performance of the composite collectors made from different types of fatty acids and fatty alcohols.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown, it is well suited to various fields of use for which the invention is suited, and further modifications may be readily made by one skilled in the art, and the invention is therefore not to be limited to the particular details and examples shown and described herein, without departing from the general concepts defined by the claims and the equivalents thereof.
Claims (10)
1. The mineral type rare earth ore positive flotation composite collector is characterized by comprising the following components:
fatty acids, fatty alcohols and sodium hydroxide solution;
Wherein the mass ratio of the fatty acid to the fatty alcohol is 10:1, the mass concentration of the sodium hydroxide solution is 10-20%, and the mass is equal to the sum of the mass of the fatty acid and the fatty alcohol.
2. The mineral type rare earth ore positive flotation composite collector as claimed in claim 1, wherein the fatty acid is a C8-C18 fatty acid, and the fatty alcohol is a C10-C16 fatty alcohol.
3. A method for preparing the mineral type rare earth ore positive flotation composite collector as claimed in claim 1 or 2, comprising the following steps:
s1, melting fatty acid and fatty alcohol;
S2, mixing the melted fatty acid and fatty alcohol in the S1 according to a mass ratio of 10:1, and continuously stirring and uniformly mixing to obtain a mixture;
S3, adding 10-20% sodium hydroxide solution with the mass concentration equal to that of the mixture in the step S2, stirring and saponifying to obtain a prefabricated product;
S4, adding deionized water into the prefabricated product obtained in the step S3, and diluting until the mass concentration of the prefabricated product is 2-10%, thus obtaining the mineral type rare earth ore positive flotation composite collector.
4. The method for preparing the mineral type rare earth ore positive flotation composite collector as claimed in claim 3, wherein the fatty acid and the fatty alcohol in S1 are melted at the temperature of 50-70 ℃.
5. The method for preparing a mineral type rare earth ore positive flotation composite collector as claimed in claim 3, wherein the continuous stirring time is 5-6 minutes when the melted fatty acid and fatty alcohol in S2 are mixed.
6. The method for preparing a mineral type rare earth ore forward flotation composite collector as claimed in claim 3, wherein the stirring saponification time in S3 is 5-10 minutes.
7. A rare earth flotation method using the mineral type rare earth ore positive flotation composite collector as claimed in claim 1 or 2, comprising the steps of:
A. Crushing rare earth ore to a mineral grain with the grain diameter smaller than 0.074mm accounting for 65-85 percent;
B. c, carrying out primary rough flotation on the rare earth mineral powder crushed in the step A to obtain rough concentrate and rough tailings;
Wherein, during coarse flotation, the consumption of water glass is 400-800g/t, the consumption of the positive flotation composite collector is 600-1000g/t, the pH value of ore pulp is 4-5.5, and the mass concentration of ore pulp is 30-40%;
C. b, scavenging the rougher tailings obtained in the step B for two times to obtain flotation tailings;
Wherein the dosage of the positive flotation composite collector is 200-300g/t during scavenging;
D. Performing tertiary fine flotation on the rough concentrate obtained in the step B to obtain flotation concentrate, and taking the flotation concentrate as rare earth concentrate;
Wherein, the dosage of the water glass is 100-200g/t and the dosage of the positive flotation composite collector is 200-300g/t during the fine flotation.
8. A rare earth flotation process according to claim 7, wherein the scavenger concentrate obtained in the first scavenger in step C is returned to the next coarse flotation feed and the scavenger concentrate obtained in the second scavenger in step C is returned to the next first scavenger feed in step C.
9. The rare earth flotation method according to claim 7, wherein tailings obtained by the first fine flotation in the step D are returned to the coarse flotation feed of the next time, tailings obtained by the second fine flotation in the step D are returned to the first fine flotation feed of the next time in the step D, and tailings obtained by the third fine flotation in the step D are returned to the second fine flotation feed of the next time in the step D.
10. The rare earth flotation method according to claim 7, wherein the rough flotation time in the step B is 4-6min at 20-55 ℃, the scavenging time in the step C is 1-2min, and the fine flotation time in the step D is 1-2min at 20-55 ℃.
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