CN111215248B - Collecting agent for floating uranyl carbonate ions and preparation method and application thereof - Google Patents
Collecting agent for floating uranyl carbonate ions and preparation method and application thereof Download PDFInfo
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- CN111215248B CN111215248B CN201911200433.0A CN201911200433A CN111215248B CN 111215248 B CN111215248 B CN 111215248B CN 201911200433 A CN201911200433 A CN 201911200433A CN 111215248 B CN111215248 B CN 111215248B
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- uranyl carbonate
- carbonate ions
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- flotation
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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
- B03D1/004—Organic compounds
- B03D1/016—Macromolecular 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
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/014—Organic compounds containing phosphorus
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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
- B03D1/02—Froth-flotation processes
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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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Abstract
The invention provides a collecting agent for floating uranyl carbonate ions, which consists of dodecyl phosphate, dodecylamine and tween.
Description
Technical Field
The invention relates to the technical field related to enrichment of uranyl carbonate ions, and particularly relates to a collecting agent for floating uranyl carbonate ions, and a preparation method and application thereof.
Background
In a traditional uranium hydrometallurgy system, single alkyl phosphate ion is adopted for flotation, enrichment and separation of uranyl carbonate ions, and the new process is adopted, but only alkyl phosphate ions are used as collecting agents, so that the using amount is large, the cost is high, and the industrial application of the collecting agents is restricted.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the collecting agent for floating uranyl carbonate ions, and the formed mixed solution is used as the collecting agent for uranyl carbonate ions by adding laurylamine and tween into dodecyl phosphate, so that the using amount is less and the cost is lower than the single use of dodecyl phosphate.
In order to achieve the above purpose, the invention provides the following technical scheme:
a collector for floating uranyl carbonate ions is composed of dodecyl phosphate, dodecylamine and tween.
Further, the mass ratio of the dodecyl phosphate to the dodecylamine to the tween is 100: 10: 1.
the invention also discloses a preparation method of the collecting agent for floating uranyl carbonate ions, which comprises the following steps: adding dodecylamine and tween into dodecyl phosphate to dissolve the dodecylamine and the tween into the dodecyl phosphate to form a mixed solution, thus obtaining the collector.
The invention also discloses a method for floating uranyl carbonate ions, which comprises the step of floating the uranyl carbonate ions in the uranyl carbonate solution by using the collecting agent or the collecting agent prepared by the method.
Further, the method specifically comprises the following steps:
s1: preparing a collector mixed solution;
s2: adding the uranyl carbonate ion solution into flotation equipment, then adding the mixed solution prepared in the step S1, uniformly stirring, inflating for flotation, and obtaining foam water and tail water after the flotation is finished.
Further, the mass ratio of the collecting agent to the uranyl carbonate ions is 8-1: 2.
further, the stirring time in the S2 is 5-10min, and the aeration quantity is 10-20L/min.
Further, the concentration of the uranyl carbonate ions in the uranyl carbonate ion solution in S2 is 300 mg/L; the concentration of the uranyl carbonate ions in the tail water is 3-15 mg/L.
Compared with the prior art, the invention has the following beneficial effects:
according to the collector for floating uranyl carbonate ions, provided by the invention, dodecylamine and tween are added into dodecyl phosphate to form a mixed collector, in uranyl carbonate ion flotation, the dodecylamine and dodecyl phosphate in the mixed collector are subjected to co-adsorption and form a complex with uranyl carbonate ions, so that the mixed collector has hydrophobicity, and the tween can reduce the surface tension of the dodecylamine and dodecyl phosphate, promote the dissolution of the dodecylamine and dodecyl phosphate and the formation of the complex of the dodecylamine, dodecyl phosphate and uranyl carbonate ions, greatly reduce the use of the dodecyl phosphate and dodecylamine, and improve the flotation effect on the uranyl carbonate ions.
Detailed Description
The invention aims to provide a collector for floating uranyl carbonate ions, which can reduce the using amount and has good floating effect when the collector is used for floating the uranyl carbonate ions, and the specific technical scheme is as follows:
a collecting agent for floating uranyl carbonate ions comprises dodecyl phosphate, dodecylamine and tween; preferably, the mass ratio of the dodecyl phosphate to the dodecylamine to the tween is 100: 10: 1.
the invention also discloses a preparation method of the collecting agent, which comprises the following steps:
adding dodecylamine and tween into dodecyl phosphate, and uniformly mixing to form a mixed solution, thus preparing the collecting agent for floating uranyl carbonate ions.
The invention also discloses a method for floating uranyl carbonate ions, which comprises the following specific scheme:
s1: preparing a collector mixed solution according to the preparation method;
s2: adding a uranyl carbonate solution with a uranyl carbonate ion concentration of 300mg/L into check equipment, adding a mixed solution (namely a collecting agent) prepared by S1, stirring at the speed of 1500-.
Tests show that the concentration of uranyl carbonate ions in the foam water is more than 4000mg/L, and the concentration of the tail water is 3-15 mg/L.
After the flotation is finished, the obtained foam water is subjected to smelting treatment in the next procedure; the obtained tail water is treated to increase the concentration of uranyl carbonate ions, and then the next circulation flotation is carried out.
The technical solutions of the present invention will be described clearly and completely in the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A collecting agent for floating uranyl carbonate ions comprises dodecyl phosphate, dodecylamine and tween-20, wherein the mass ratio of the dodecyl phosphate to the dodecylamine to the tween-20 is 100: 10: 1.
the preparation method of the uranyl carbonate comprises the following steps:
adding dodecylamine and tween-20 into dodecyl phosphate, and uniformly stirring at normal temperature to form the mixed collecting agent for floating uranyl carbonate ions.
Example 2
A method for floating uranyl carbonate comprises the following steps:
s1: preparing a mixed collector by adopting the method of example 1, wherein the mixed collector consists of dodecyl phosphate, dodecylamine and tween-20; the mass ratio of the dodecyl phosphate to the dodecylamine to the tween-20 is 100: 10: 1;
s2: adding 1L uranyl carbonate solution with uranyl carbonate ion concentration of 300mg/L into a laboratory 1.5L groove-hanging flotation machine, adding the mixed collecting agent prepared in S1, stirring at the speed of 1500r/min for 10min, and then performing aeration flotation for 15min, wherein the aeration amount is 20L/min, so as to obtain foamed water and tail water; wherein the mass ratio of the mixed collector to the uranyl carbonate ions is 4: 1.
examples 3 to 7
Uranyl carbonate ions were floated by the method of example 2, wherein examples 3 to 7 differ from example 2 in the mass ratio of the collector mixture to the uranyl carbonate ions in S2, as shown in table 1.
Table 1 mass ratio of hybrid collector to uranyl carbonate ion in examples 3-7
The foamed water and tail water obtained in examples 2 to 8 were subjected to the measurement of the uranyl carbonate ion concentration, and the measurement results are shown in table 2.
Table 2 test results of uranyl carbonate ion concentration in foam water and tail water obtained in examples 2 to 8
Comparative example 1
The method for floating uranyl carbonate ions by using laurylamine as a collecting agent comprises the following steps:
adding 1L of uranyl carbonate ion solution with the concentration of 300mg/L into a 1.5L tank-hanging flotation machine in a laboratory, then adding dodecylamine, stirring at the speed of 1500r/min for 10min, then performing aeration flotation for 15min with the aeration amount of 20L/min to obtain foam water and tail water, wherein the mass ratio of the dodecylamine to the uranyl carbonate ions is 4: 1.
comparative examples 2 to 7
Uranyl carbonate ions were floated by the method of comparative example 1, wherein comparative examples 2 to 7 differ from comparative example 1 in the mass ratio of the dodecylamine to uranyl carbonate used, as shown in table 3.
TABLE 3 comparative examples 2-7 mass ratios of dodecylamine to uranyl carbonate ion
The frothed water and tail water obtained after flotation in comparative examples 1 to 7 were subjected to a test for uranyl carbonate ion concentration, and the test results are shown in table 4.
Table 4 test results of uranyl carbonate ion concentration in the frothed water and tail water obtained after flotation of comparative examples 1 to 8
Comparative example 8
And (3) carrying out flotation on the uranyl carbonate ions by adopting the method of comparative example 1, wherein the comparative example is different from the comparative example 1 in that a collecting agent is dodecyl phosphate, and the mass ratio of the collecting agent to the uranyl carbonate ions is consistent with that in the comparative example 1.
Comparative examples 9 to 14
And (3) carrying out flotation on the uranyl carbonate ions by adopting the method of the comparative example 1, wherein the comparative examples 9-14 are different from the comparative example 8 in that the amount of the collecting agent is different from that of the comparative example 8, and is specifically shown in the table 5.
TABLE 5 Mass ratios of dodecyl phosphate to uranyl carbonate ions of comparative examples 9 to 14
The foamed water and tail water obtained in comparative examples 8 to 14 were subjected to the test for the uranyl carbonate ion concentration, and the test results are shown in table 6.
TABLE 6 test results of uranyl carbonate ion concentration in foam water and tail water obtained in comparative examples 8 to 14
As shown in tables 2, 4 and 6, uranyl carbonate ions were floated using a single dodecylamine or dodecyl phosphate as the collector when the mass ratio of dodecylamine or dodecyl phosphate to uranyl carbonate ions was 2.2: 1, the flotation effect is optimal; when the mixed collector is used, the mass ratio of the mixed collector to the uranyl carbonate ions is 1.8: 1, the best flotation effect can be realized, so that the use amount of the collecting agent can be reduced when the mixed collecting agent provided by the invention is used for floating uranyl carbonate ions, and the use amount of the mixed collecting agent is reduced by 18% compared with the use amount of single dodecylamine or dodecyl phosphate by calculation; and the concentration of the uranyl carbonate ions in the froth water after flotation is the highest, and the concentration of the uranyl carbonate ions in the tail water is the lowest, so that the mixed collecting agent provided by the invention has a good effect in the application of the flotation of the uranyl carbonate ions, and the production cost can be greatly reduced by applying the mixed collecting agent to industrial production.
While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The collector for floating uranyl carbonate ions is characterized by consisting of dodecyl phosphate, dodecylamine and tween, wherein the mass ratio of the dodecyl phosphate to the dodecylamine to the tween is 100: 10: 1.
2. the preparation method of the collector for floating uranyl carbonate ions according to claim 1, wherein dodecylamine and tween are added into dodecyl phosphate to be dissolved to form a mixed solution.
3. A method for flotation of uranyl carbonate ions, characterized in that flotation is carried out using the collector of claim 1 or the collector prepared by the preparation method of claim 2, and specifically comprises the following steps:
s1: preparing a collector mixed solution;
s2: adding the uranyl carbonate ion solution into flotation equipment, then adding the mixed solution prepared in the step S1, uniformly stirring, inflating for flotation, and obtaining foam water and tail water after the flotation is finished; the concentration of the uranyl carbonate ions in the uranyl carbonate ion solution is 300 mg/L; the mass ratio of the collecting agent to the uranyl carbonate ions is 8-1: 2.
4. the method for floating uranyl carbonate ions according to claim 3, wherein stirring time in S2 is 5-10min, and aeration amount is 10-20L/min.
5. A process for the flotation of uranyl carbonate ions according to claim 3 or claim 4, wherein the concentration of uranyl carbonate ions in the tail water is 3 to 15 mg/L.
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