CN114457234A - Rare earth impurity removal and enrichment ion exchange system and process method - Google Patents
Rare earth impurity removal and enrichment ion exchange system and process method Download PDFInfo
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- CN114457234A CN114457234A CN202110838065.3A CN202110838065A CN114457234A CN 114457234 A CN114457234 A CN 114457234A CN 202110838065 A CN202110838065 A CN 202110838065A CN 114457234 A CN114457234 A CN 114457234A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/42—Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
Abstract
The invention relates to the technical field of rare earth extraction, in particular to a rare earth impurity removal and enrichment ion exchange system and a process method, which comprises an analytic system, an impurity removal ion exchange system, an adsorption and enrichment ion exchange system, a recovery system, a transition system, a filter pressing system, a deionization ion exchange system and a collection system; the impurity-removing ion exchange system comprises: the sand tank and the first resin tank, the adsorption and enrichment ion exchange system comprises a second resin tank and a third resin tank, and the water outlets of the sand tank and the first resin tank are connected with the water outlets of the second resin tank and the third resin tank through pipelines with valves. The invention uses ion exchange technology to concentrate rare earth liquid by dozens or even hundreds of times in the adsorption and analysis process, so that the input rare earth mother liquid with low concentration can enrich rare earth with extremely high concentration at one time, and has no pollution to the environment and low impurity content.
Description
Technical Field
The invention relates to the technical field of rare earth extraction, in particular to a rare earth impurity removal and enrichment ion exchange system and a process method.
Background
The mining of ionic rare earths belongs to the category of chemical solution mining, and leachate in the mining process always contains a large amount of impurities, such as iron, aluminum, silicon, calcium, silicates and the like, which must be removed before further processing. At present, a chemical method, a method adopting a medicament, pH adjustment and solvent extraction are time-consuming, high in cost and low in efficiency, a large amount of chemical agents are used to cause environmental contamination, and wastewater containing multiple elements after impurity removal cannot be recycled if the wastewater is not treated. The separation of impurities to improve purity is one of the important links in metallurgical engineering, and different reagents and methods must be adopted to process the elements according to the same physicochemical properties as the compounds and the slight difference between the elements.
The invention provides a rare earth in-situ leaching and enriching process of ionic rare earth ore, which comprises the following steps: the method comprises the following steps: injecting an ore leaching agent and a shrinking agent into the ore body, and leaching the ore in situ to leach the 'ionic phase' and part of the 'other phase state' rare earth to obtain mother liquor; step two: introducing an impurity removing agent I into the medium-concentration and high-concentration mother liquor to remove impurities, precipitating by using a precipitator, washing by using clear water, filtering and firing to obtain a solid rare earth product; the impurity removing agent I is a mixed solution of a sodium bicarbonate solution and a sodium carbonate solution, and the precipitator is a sodium bicarbonate solution; introducing an impurity removing agent II into the low-concentration mother liquor for neutralization to remove aluminum impurities, introducing the mother liquor subjected to aluminum removal into an ion exchange column for adsorption and enrichment of rare earth ions, and desorbing by using acid to obtain a liquid rare earth product; the impurity removing agent II is lime milk.
The rare earth element that adopts the oxalic acid to carry out when prior art purifies the tombarthite deposits the edulcoration, lead to the use of a large amount of oxalic acid to causing the pollution, and the tradition deposits edulcoration technology and need establish large area's hydrometallurgy workshop at the exploitation scene, construct bulky edulcoration pond, sedimentation tank and transfer pond etc. lead to except that initial stage capital construction input is big, the material transportation in each leaching pond also consumes a large amount of energy, and traditional leaching deposits the edulcoration technology and is manual operation completely, the stirring, add the medicine, join in marriage acid and flow control all needs manual intervention, lead to intensity of labour big, work efficiency is low. Therefore, there is a need to design a rare earth impurity removal and enrichment ion exchange system and a process method to solve the above problems.
Disclosure of Invention
The invention aims to provide a rare earth impurity removal and enrichment ion exchange system and a process method, which are used for solving the problems of environmental pollution, large investment and low efficiency in the background technology.
The technical scheme of the invention is as follows: the rare earth impurity removal and enrichment ion exchange system comprises an analysis system, an impurity removal ion exchange system, an adsorption and enrichment ion exchange system, a recovery system, a transition system, a filter pressing system, a deionization ion exchange system and a collection system;
the impurity-removing ion exchange system comprises: the adsorption and enrichment ion exchange system comprises a sand tank and a first resin tank, wherein water outlets of the sand tank and the first resin tank are connected with water outlets of the second resin tank and the third resin tank through pipelines with valves;
analytic system includes clear water groove, circulating water tank and analytic medicament groove, clear water groove, circulating water tank and analytic medicament groove communicate each other through the pipeline that has the valve, one side in analytic medicament groove is provided with the second booster pump, the delivery port of second booster pump has the second flowmeter through the pipe connection, one side of second flowmeter is provided with the compressor, the gas outlet of compressor passes through the pipe connection with the water inlet of second flowmeter.
Further, transition system includes midway pond, it has third booster pump, third flowmeter and first electron flowmeter to establish ties in proper order between the delivery port of midway pond and the water inlet of second resin jar, all be provided with first agitator and second water level measuring apparatu in clear water groove, the circulating water groove and the analytic medicament groove, the inside of clear water groove is provided with the water level controller.
Further, the recovery system comprises a collection pool, and the recovery system is connected with the analysis system through a pipeline.
Further, the inside of collecting pit is provided with first water level measuring apparatu and first ion detector, it has first booster pump and first flowmeter to establish ties in proper order between the delivery port of collecting pit and the water inlet of sand tank.
Furthermore, the deionization exchange system is connected with a collection system through a pipeline, and the collection system is connected with the adsorption and enrichment ion exchange system through a pipeline.
Further, the filter-pressing system passes through the pipe connection with analytic system, the filter-pressing system includes concentrated jar, impurity jar and opens the accent groove, the delivery port of concentrated jar and impurity jar all has the pressure filter through the pipe connection, filter tank and fourth booster pump have established ties in proper order between pressure filter and the collecting pit, open and transfer between the water inlet of groove and concentrated jar and impurity jar through the pipe connection and add the medicine pump, it all is provided with the water level controller to contract jar and impurity jar inside.
Furthermore, a third water level measuring instrument and a second ion detector are arranged in the midway pool, and the second ion detector is electrically connected with the first electronic flowmeter through a lead.
The rare earth impurity removal and enrichment ion exchange process method is characterized by comprising the following steps:
s1, leaching rare earth from a mine, namely leaching rare earth ore collected on the mine by using a recycled liquid medicine to form a rare earth mother solution;
s2, collecting rare earth mother liquor, collecting the rare earth mother liquor by using a collecting tank, and precipitating soil particles in the mother liquor by using the collecting tank;
s3, removing impurities through ion exchange, sequentially conveying mother liquor to the interior of a first resin tank through a first booster pump, adsorbing rare earth ions on resin functional groups through the first resin tank, further separating the impurity ions from the rare earth ions, then introducing a detergent in the sand tank into the interior of the first resin tank, removing the rare earth ions, and introducing the rare earth ions into a midway pool;
s4, adsorbing and enriching the rare earth through ion exchange, introducing the ionic liquid in the midway tank into the second resin tank and the third resin tank through a third booster pump for enriching the rare earth ions, eluting the rare earth ions in the second resin tank and the third resin tank through a eluent again, and the concentrated rare earth solution after being resolved is conveyed into a concentration tank, impurity ions are conveyed into an impurity tank, the medicament in the medicament analysis tank is sent into a concentration tank and an impurity tank by a second booster pump and is stirred by a water level controller, so that the rare earth ions in the concentration tank form high-purity rare earth carbonate precipitates, the impurity concentrated solution in the impurity tank forms impurity ion precipitates, then conveying the impurity ion precipitate and the high-purity rare earth carbonate precipitate into a filter press through a diaphragm pump respectively, so that the high-purity rare earth carbonate precipitate is dehydrated into a rare earth finished product;
s5, recycling/ore closing, namely enabling the liquid obtained after the rare earth ions are enriched in the second resin tank and the third resin tank to flow into a collection system for recycling, so that the liquid is separated into waste liquid and recycled liquid, and the recycled liquid is returned to the mine again to leach the rare earth ore;
s6, recovering ammonia nitrogen, namely recovering ammonia ions and nitrogen ions from the waste liquid by adopting a deionization exchange system;
and S7, discharging after reaching the standard, filtering the waste liquid from which the nitrogen ions and the ammonia ions are removed to reach the standard, and then discharging the waste liquid reaching the standard.
Further, in S3, the detergent is either HCl or NaOH solution, and the ph of the solution in the middle tank is neutral.
Further, in S4, the ammonium bicarbonate chemical in the adjustment tank is added to the concentration tank and the impurity tank by the chemical addition pump, the liquid flowing out of the filter press is recovered by the filter tank, and the liquid is sent to the inside of the circulation water tank by the third booster pump.
Compared with the prior art, the invention has the following improvements and advantages that through improving the rare earth impurity removal and enrichment ion exchange system and the process method provided by the invention:
(1) the invention uses ion exchange technology to concentrate rare earth liquid by dozens or even hundreds of times in the adsorption and analysis process, so that the input rare earth mother liquid with low concentration can enrich rare earth with extremely high concentration at one time, and has no pollution to the environment and low impurity content.
(2) The invention utilizes the ion exchange process, uses few process tanks, only needs 2-3 sedimentation tanks except necessary liquid preparation tanks, and only needs about 50 cubic per tank, the ion exchange equipment comprising the control system mainly comprises the exchange columns, and the exchange columns belong to portable mobile equipment, are convenient to carry, and further greatly reduce the construction cost of the site.
(3) The invention applies the mechanization and automation control technology to the rare earth ion purification, so that the whole process is closed and continuous, thereby increasing the environmental protection, reducing the labor intensity and improving the product quality and the working efficiency.
(4) According to the invention, the liquid inflow after the rare earth ions are enriched is recovered by using the collection system, so that the liquid is separated into the waste liquid and the recycled liquid, and the recycled liquid is returned to the mine to leach the rare earth ore, so that the liquid medicine can be recycled, and further the production cost of rare earth mining is saved.
Drawings
The invention is further explained below with reference to the figures and examples:
FIG. 1 is a schematic diagram of a rare earth impurity removal enrichment ion exchange system of the present invention;
FIG. 2 is a schematic diagram of a parsing system of the present invention;
FIG. 3 is a schematic view of the recovery system of the present invention;
FIG. 4 is a schematic view of an adsorption and enrichment ion exchange system of the present invention;
FIG. 5 is a schematic view of a pressure filtration system of the present invention;
FIG. 6 is a flow chart of the rare earth impurity removal and enrichment ion exchange process method of the invention.
Description of reference numerals:
1 analytic system, 2 impurity-removing ion exchange system, 3 adsorption and enrichment ion exchange system, 4 recovery system, 5 transition system, 6 collecting tank, 7 first water level measuring instrument, 8 first booster pump, 9 first flow meter, 10 first ion detector, 11 clear water tank, 12 circulating water tank, 13 analytic chemical agent tank, 14 second booster pump, 15 compressor, 16 second water level measuring instrument, 17 filter pressing system, 18 deionization exchange system, 19 collecting system, 20 first stirrer, 21 second flow meter, 22 water level controller, 23 water level controller, 24 sand tank, 25 first resin tank, 26 midway tank, 27 third water level measuring instrument, 28 second ion detector, 29 third booster pump, 30 second resin tank, 31 third resin tank, 32 third flow meter, 33 first electronic flow meter, 34 concentration tank, 35 impurity tank, 36 open-regulating tank, 37 open-closed regulating tank, 13 open-closed regulating tank, and the like, A 38 filter press, a 39 filter tank, a 40 fourth booster pump and a 41 dosing pump.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 6, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a rare earth impurity removal and enrichment ion exchange system through improvement, as shown in figures 1-5, the system comprises an analysis system 1, an impurity removal ion exchange system 2, an adsorption and enrichment ion exchange system 3, a recovery system 4, a transition system 5, a filter pressing system 17, a deionization ion exchange system 18 and a collection system 19;
the impurity-removing ion exchange system 2 includes: the adsorption and enrichment ion exchange system 3 comprises a sand tank 24 and a first resin tank 25, the water outlets of the sand tank 24 and the first resin tank 25 are connected with the water outlets of the second resin tank 30 and the third resin tank 31 through pipelines with valves, the water inlets of the sand tank 24 and the first resin tank 25 are connected with the water inlets of the second resin tank 30 and the third resin tank 31 through pipelines with valves, the water outlet of the sand tank 24 is connected with the water inlet of the first resin tank 25 through a pipeline with a valve, and the water outlet of the second resin tank 30 is connected with the water inlet of the third resin tank 31 through a pipeline with a valve;
the analysis system 1 comprises a clean water tank 11, a circulating water tank 12 and an analysis agent tank 13, wherein the clean water tank 11, the circulating water tank 12 and the analysis agent tank 13 are mutually communicated through a pipeline with a valve, a second booster pump 14 is arranged on one side of the analysis agent tank 13, a water outlet of the second booster pump 14 is connected with a second flow meter 21 through a pipeline, a compressor 15 is arranged on one side of the second flow meter 21, and an air outlet of the compressor 15 is connected with a water inlet of the second flow meter 21 through a pipeline.
Further, the transition system 5 includes a middle tank 26, a third booster pump 29, a third flow meter 32 and a first electronic flow meter 33 are connected in series between a water outlet of the middle tank 26 and a water inlet of a second resin tank 30 in this order, a first stirrer 20 and a second water level measuring instrument 16 are provided in the clean water tank 11, the circulating water tank 12 and the eluent tank 13, and a water level controller 22 is provided inside the clean water tank 11.
Further, the recovery system 4 comprises a collecting tank 6, and the recovery system 4 is connected with the resolution system 1 through a pipeline.
Further, a first water level measuring instrument 7 and a first ion detector 10 are arranged inside the collecting tank 6, and a first booster pump 8 and a first flow meter 9 are sequentially connected in series between the water outlet of the collecting tank 6 and the water inlet of the sand tank 24.
Further, the deionization exchange system 18 is connected to the collection system 19 through a pipe, and the collection system 19 is connected to the adsorption and enrichment ion exchange system 3 through a pipe.
Further, the filter pressing system 17 is connected with the analysis system 1 through a pipeline, the filter pressing system 17 comprises a concentration tank 34, an impurity tank 35 and an opening and adjusting tank 36, water outlets of the concentration tank 34 and the impurity tank 35 are connected with a filter press 38 through pipelines, a filter tank 39 and a fourth booster pump 40 are sequentially connected between the filter press 38 and the collecting tank 6 in series, a dosing pump 41 is connected between the opening and adjusting tank 36 and water inlets of the concentration tank 34 and the impurity tank 35 through pipelines, and a water level controller 23 is arranged inside the contraction tank and the impurity tank 35.
Further, a third water level measuring instrument 27 and a second ion detector 28 are disposed inside the midway tank 26, and the second ion detector 28 is electrically connected to the first electronic flow meter 33 through a lead.
The rare earth impurity removal and enrichment ion exchange process method, as shown in fig. 6, comprises the following steps:
s1, leaching rare earth from a mine, namely leaching rare earth ore collected on the mine by using a recycled liquid medicine to form a rare earth mother solution;
s2, collecting rare earth mother liquor, collecting the rare earth mother liquor by using a collecting tank 6, and precipitating soil particles in the mother liquor by using the collecting tank 6;
s3, removing impurities through ion exchange, sequentially conveying the mother liquor into a first resin tank 25 through a first booster pump 8, adsorbing rare earth ions on resin functional groups through the first resin tank 25, further separating impurity ions from the rare earth ions, introducing a detergent in a sand tank 24 into the first resin tank 25, removing the rare earth ions, and introducing the rare earth ions into a midway pool 26;
s4, adsorbing and enriching the rare earth through ion exchange, introducing the ionic liquid in the midway tank 26 into the second resin tank 30 and the third resin tank 31 through a third booster pump 29 for enriching the rare earth ions, eluting the rare earth ions in the second resin tank 30 and the third resin tank 31 through a eluent again, and the concentrated rare earth solution after being resolved is conveyed into a concentration tank 34, impurity ions are conveyed into an impurity tank 35, the chemical in the desorption chemical tank 13 is sent to the concentration tank 34 and the impurity tank 35 by the second booster pump 14, stirring by a water level controller 23 to enable rare earth ions in the concentration tank 34 to form high-purity rare earth carbonate precipitates, enable impurity concentrated solution in the impurity tank 35 to form impurity ion precipitates, then, the impurity ion precipitate and the high-purity rare earth carbonate precipitate are respectively conveyed into a filter press 38 through a diaphragm pump 37, so that the high-purity rare earth carbonate precipitate is dehydrated into a rare earth finished product;
s5, recycling/ore closing, namely enabling the liquid obtained after the rare earth ions are enriched in the second resin tank 30 and the third resin tank 31 to flow into a collection system 19 for recycling, so that the liquid is separated into waste liquid and recycled liquid, and the recycled liquid is returned to the mine again to leach the rare earth ore;
s6, recovering ammonia nitrogen, namely recovering ammonia ions and nitrogen ions from the waste liquid by adopting a deionization exchange system 18;
and S7, discharging after reaching the standard, filtering the waste liquid from which the nitrogen ions and the ammonia ions are removed to reach the standard, and then discharging the waste liquid reaching the standard.
Further, in S3, the detergent is either HCl or NaOH solution, and the ph of the solution in the middle tank 26 is neutral.
Further, in S4, the ammonium bicarbonate chemical in the adjustment tank 36 is fed by the chemical feed pump 41 to the concentration tank 34 and the impurity tank 35, respectively, the liquid flowing out of the filter press machine 38 is recovered by the filter tank 39, and the liquid is sent to the inside of the circulation water tank 12 by the third booster pump 29.
The working principle of the invention is as follows: s1, leaching rare earth from a mine, namely leaching rare earth ore collected on the mine by using a recycled liquid medicine to form a rare earth mother solution; s2, collecting rare earth mother liquor, collecting the rare earth mother liquor by adopting a collecting tank 6, and precipitating soil particles in the mother liquor by using the collecting tank 6; s3, removing impurities through ion exchange, sequentially conveying the mother liquor into a first resin tank 25 through a first booster pump 8, adsorbing rare earth ions on resin functional groups through the first resin tank 25, further separating impurity ions from the rare earth ions, introducing a detergent in a sand tank 24 into the first resin tank 25, removing the rare earth ions, and introducing the rare earth ions into a midway pool 26; s4, adsorbing and enriching the rare earth through ion exchange, introducing the ionic liquid in the midway tank 26 into the second resin tank 30 and the third resin tank 31 through a third booster pump 29 for enriching the rare earth ions, eluting the rare earth ions in the second resin tank 30 and the third resin tank 31 through a eluent again, and the concentrated rare earth solution after being resolved is conveyed into a concentration tank 34, impurity ions are conveyed into an impurity tank 35, the chemical in the desorption chemical tank 13 is sent to the concentration tank 34 and the impurity tank 35 by the second booster pump 14, stirring by a water level controller 23 to enable rare earth ions in the concentration tank 34 to form high-purity rare earth carbonate precipitates, enable impurity concentrated solution in the impurity tank 35 to form impurity ion precipitates, then, the impurity ion precipitate and the high-purity rare earth carbonate precipitate are respectively conveyed into a filter press 38 through a diaphragm pump 37, so that the high-purity rare earth carbonate precipitate is dehydrated into a rare earth finished product; s5, recycling/ore closing, namely enabling the liquid obtained after the rare earth ions are enriched in the second resin tank 30 and the third resin tank 31 to flow into a collection system 19 for recycling, so that the liquid is separated into waste liquid and recycled liquid, and the recycled liquid is returned to the mine again to leach the rare earth ore; s6, recovering ammonia nitrogen, namely recovering ammonia ions and nitrogen ions from the waste liquid by adopting a deionization exchange system 18; and S7, discharging after reaching the standard, filtering the waste liquid from which the nitrogen ions and the ammonia ions are removed to reach the standard, and then discharging the waste liquid reaching the standard.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. Rare earth edulcoration enrichment ion exchange system which characterized in that: comprises an analysis system (1), an impurity-removing ion exchange system (2), an adsorption and enrichment ion exchange system (3), a recovery system (4), a transition system (5), a pressure filtration system (17), a deionization ion exchange system (18) and a collection system (19);
the dedust ion exchange system (2) comprises: the adsorption and enrichment ion exchange system comprises a sand tank (24) and a first resin tank (25), the adsorption and enrichment ion exchange system (3) comprises a second resin tank (30) and a third resin tank (31), the water outlets of the sand tank (24) and the first resin tank (25) are connected with the water outlets of the second resin tank (30) and the third resin tank (31) through pipelines with valves, the water inlets of the sand tank (24) and the first resin tank (25) are connected with the water inlets of the second resin tank (30) and the third resin tank (31) through pipelines with valves, the water outlet of the sand tank (24) is connected with the water inlet of the first resin tank (25) through a pipeline with valves, and the water outlet of the second resin tank (30) is connected with the water inlet of the third resin tank (31) through a pipeline with valves;
analytic system (1) is including clear water groove (11), circulation tank (12) and analysis medicament groove (13), clear water groove (11), circulation tank (12) and analysis medicament groove (13) communicate each other through the pipeline that has the valve, one side of analysis medicament groove (13) is provided with second booster pump (14), there is second flowmeter (21) water outlet of second booster pump (14) through the pipe connection, one side of second flowmeter (21) is provided with compressor (15), the gas outlet of compressor (15) passes through the pipe connection with the water inlet of second flowmeter (21).
2. The rare earth impurity removal and enrichment ion exchange system according to claim 1, characterized in that: transition system (5) are including midway pond (26), it has third booster pump (29), third flow meter (32) and first electronic flowmeter (33) to establish ties in proper order between the delivery port of midway pond (26) and the water inlet of second resin jar (30), all be provided with first agitator (20) and second water level measuring instrument (16) in clear water groove (11), circulation basin (12) and the analysis medicament groove (13), the inside of clear water groove (11) is provided with water level controller (22).
3. The rare earth impurity removal and enrichment ion exchange system according to claim 1, characterized in that: the recovery system (4) comprises a collection pool (6), and the recovery system (4) is connected with the analysis system (1) through a pipeline.
4. The rare earth impurity removal and enrichment ion exchange system according to claim 3, wherein: the inside of collecting pit (6) is provided with first water level measuring apparatu (7) and first ion detector (10), it has first booster pump (8) and first flowmeter (9) to establish ties in proper order between the delivery port of collecting pit (6) and the water inlet of sand jar (24).
5. The rare earth impurity removal and enrichment ion exchange system according to claim 1, characterized in that: the deionization exchange system (18) is connected with a collection system (19) through a pipeline, and the collection system (19) is connected with the adsorption and enrichment ion exchange system (3) through a pipeline.
6. The rare earth impurity removal and enrichment ion exchange system according to claim 3, wherein: filter-pressing system (17) and analytic system (1) pass through the pipe connection, filter-pressing system (17) are including concentrated jar (34), impurity jar (35) and division transfer groove (36), the delivery port of concentrated jar (34) and impurity jar (35) all has pressure filter (38) through the pipe connection, it has filter tank (39) and fourth booster pump (40) to establish ties in proper order between pressure filter (38) and collecting pit (6), it has dosing pump (41) to open between the water inlet of transfer groove (36) and concentrated jar (34) and impurity jar (35) through the pipe connection, it all is provided with water level controller (23) to contract jar and impurity jar (35) inside.
7. The rare earth impurity removal and enrichment ion exchange system according to claim 2, characterized in that: and a third water level measuring instrument (27) and a second ion detector (28) are arranged in the midway pool (26), and the second ion detector (28) is electrically connected with the first electronic flowmeter (33) through a lead.
8. The rare earth impurity removal and enrichment ion exchange process method is characterized by comprising the following steps:
s1, leaching rare earth from a mine, namely leaching rare earth ore collected on the mine by using a recycled liquid medicine to form a rare earth mother solution;
s2, collecting rare earth mother liquor, collecting the rare earth mother liquor by adopting a collecting tank (6), and precipitating soil particles in the mother liquor by using the collecting tank (6);
s3, removing impurities through ion exchange, sequentially conveying the mother liquor into a first resin tank (25) through a first booster pump (8), adsorbing rare earth ions on resin functional groups through the first resin tank (25), further separating impurity ions from the rare earth ions, introducing a detergent in a sand tank (24) into the first resin tank (25), removing the rare earth ions, and introducing the rare earth ions into a midway pool (26);
s4, adsorbing and enriching ion exchange rare earth, introducing the ionic liquid in the midway tank (26) into the second resin tank (30) and the third resin tank (31) through a third booster pump (29) to enrich rare earth ions, eluting the rare earth ions in the second resin tank (30) and the third resin tank (31) through a desorption agent again, conveying the desorbed concentrated rare earth solution into a concentration tank (34), conveying impurity ions into an impurity tank (35), conveying the reagent in an analytic reagent tank (13) into the concentration tank (34) and the impurity tank (35) through a second booster pump (14), stirring through a water level controller (23), forming high-purity rare earth carbonate precipitates from the rare earth ions in the concentration tank (34), forming impurity ion precipitates from the impurity concentrated liquid in the impurity tank (35), conveying the impurity ion precipitates and the high-purity rare earth carbonate precipitates into a filter press (38) through a diaphragm pump (37) respectively So that the high-purity rare earth carbonate is precipitated and dehydrated to form a rare earth finished product;
s5, recycling/ore closing, namely enabling the liquid obtained after the rare earth ions are enriched in the second resin tank (30) and the third resin tank (31) to flow into a collection system (19) for recovery, so that the liquid is separated into waste liquid and recycled liquid, and returning the recycled liquid to the mine again for leaching rare earth ore;
s6, recovering ammonia nitrogen, namely recovering ammonia ions and nitrogen ions from the waste liquid by adopting a deionization exchange system (18);
and S7, discharging after reaching the standard, filtering the waste liquid from which the nitrogen ions and the ammonia ions are removed to reach the standard, and then discharging the waste liquid reaching the standard.
9. The rare earth impurity removal and enrichment ion exchange process method according to claim 8, which is characterized in that: in S3, the detergent is either HCl or NaOH solution, and the pH of the solution in the middle tank (26) is neutral.
10. The rare earth impurity removal and enrichment ion exchange process method according to claim 8, which is characterized in that: in S4, the ammonium bicarbonate chemical in the adjustment tank 36 is introduced into the concentration tank 34 and the impurity tank 35 by the chemical feed pump 41, the liquid flowing out of the filter press 38 is recovered by the filter tank 39, and the liquid is sent into the circulation water tank 12 by the third booster pump 29.
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