CN219744173U - Analysis and purification system device of lithium-rich adsorbent in production of alumina - Google Patents
Analysis and purification system device of lithium-rich adsorbent in production of alumina Download PDFInfo
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- CN219744173U CN219744173U CN202320718254.1U CN202320718254U CN219744173U CN 219744173 U CN219744173 U CN 219744173U CN 202320718254 U CN202320718254 U CN 202320718254U CN 219744173 U CN219744173 U CN 219744173U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 63
- 239000003463 adsorbent Substances 0.000 title claims abstract description 28
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000000746 purification Methods 0.000 title abstract description 7
- 239000012528 membrane Substances 0.000 claims abstract description 62
- 239000002253 acid Substances 0.000 claims abstract description 60
- 238000001728 nano-filtration Methods 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000000926 separation method Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000001179 sorption measurement Methods 0.000 claims abstract description 22
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 12
- 238000003795 desorption Methods 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000000243 solution Substances 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000001471 micro-filtration Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000012536 storage buffer Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002594 sorbent Substances 0.000 claims 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 4
- 238000004131 Bayer process Methods 0.000 abstract description 3
- 230000020477 pH reduction Effects 0.000 abstract 1
- 238000004886 process control Methods 0.000 abstract 1
- 230000026676 system process Effects 0.000 abstract 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 210000000582 semen Anatomy 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Abstract
A system device for analyzing and purifying a lithium-rich adsorbent in alumina production comprises an adsorption device, a solid-liquid separation device, a hydrothermal desorption device, a primary separation device of desorption liquid and a multi-stage acid-resistant nanofiltration membrane system. The adsorption device is connected with the solid-liquid separation device, a solid outlet of the solid-liquid separation device is connected with the hydrothermal analysis attaching device, the hydrothermal analysis attaching device is connected with the analysis liquid primary separation device, and the analysis liquid primary separation device is connected with the multistage acid-resistant nanofiltration system. The utility model aims at the adsorbent for adsorbing lithium in the Bayer process alumina production factory, adopts an acidification and hydrothermal reaction device as an analysis device, can effectively realize the analysis of lithium ions, and simultaneously adopts a multistage acid-resistant membrane system to effectively realize the purification of lithium ions. The method has the characteristics of simple analysis process, high lithium yield and stable system process control.
Description
Technical Field
The utility model relates to a system device for analyzing and purifying lithium, in particular to a system device for analyzing and purifying a lithium-rich adsorbent in alumina production.
Background
Lithium is an energy metal, and a lithium battery has high capacity density and no memory effect, and has become an important energy storage module. The lithium battery is widely applied to the field of energy supply of new energy automobiles, energy storage power stations and electronic products. The source of lithium is mainly lithium ore and lithium-containing brine. The lithium extraction process of lithium ore is generally a calcination method, namely, mixing and calcining the ore after mineral separation with sulfuric acid, leaching lithium ions in the ore by water after calcination, and preparing lithium carbonate after impurity removal. The method is mature, but has high energy consumption and low lithium yield. The salt lake brine is rich in a large amount of lithium resources, most of lithium and compounds thereof in the market come from salt lake lithium extraction, and a salt lake lithium extraction process using an adsorption-membrane method is formed, namely, the lithium is selectively extracted by adopting an adsorption method, and then the lithium is purified and concentrated by adopting a membrane process.
Lithium resources in bauxite in China are rich, and it is reported that lithium enters Bayer semen in the smelting process of bauxite by a Bayer process and mostly enters aluminum hydroxide crystals in the seed precipitation process. In the aluminum hydroxide refining process, the aluminum hydroxide is enriched in the electrolytic tank, and finally the operation of the electrolytic tank is influenced, so that the quality is reduced. And the part of lithium is effectively extracted, and the lithium resource is comprehensively utilized, so that the quality of aluminum products can be improved, and new benefits can be brought to an alumina factory. Aluminum hydroxide is used as a high-efficiency lithium adsorbent, and can be used for adsorbing lithium in Bayer semen, however, aluminum hydroxide crystals are used as the adsorbent, and because aluminum hydroxide is difficult to dissolve in acid and alkali, the dissolving process is complex, so that when the aluminum hydroxide crystals are used for adsorbing lithium, the resolving process is complex, and in the purifying process, the conventional precipitation method often causes lithium to enter precipitation, so that the yield of lithium is greatly reduced. Patent CN109761249a discloses a method and system for resolving lithium in a lithium-rich adsorbent of an alumina plant, however, the resolving liquid therein is not purified. Generally conventional precipitation methods result in some lithium entering the precipitate, reducing the final lithium yield.
Therefore, there is a need for a system for resolving and purifying a lithium-rich adsorbent in a bayer process alumina production plant, which solves the problems of complex resolving, reduced lithium yield and low purification efficiency.
Disclosure of Invention
Aiming at the technical problems, the utility model provides a system device for analyzing and purifying a lithium-rich adsorbent in alumina production.
A system device for analyzing and purifying a lithium-rich adsorbent in alumina production is characterized by comprising an adsorption device, a solid-liquid separation device, a hydrothermal desorption device, an analysis liquid primary separation device and a multi-stage acid-resistant nanofiltration membrane system. The outlet of the adsorption device is connected with the solid-liquid separation device, the solid outlet of the solid-liquid separation device is connected with the hydrothermal analysis attaching device, the hydrothermal analysis attaching device is connected with the analysis liquid primary separation device, and the aqueous solution outlet of the analysis liquid primary separation device is connected with the multistage acid-resistant nanofiltration membrane system. The hydrothermal analysis device is a hydrothermal reaction kettle, and a stirring part is arranged in the hydrothermal analysis device; the core membrane element of the multistage acid-resistant nanofiltration membrane system is an acid-resistant nanofiltration membrane, the number of stages is 3, and the produced water of the multistage acid-resistant nanofiltration membrane system is product liquid.
Further, the hydrothermal analysis attaching device is provided with a solid adsorbent feeding port and an aqueous solution feeding port; the pH of the solution is adjusted to be between 0.1 and 2 by adopting hydrochloric acid solution before the hydrothermal reaction, and a temperature adjusting system is further arranged to provide temperature control for the hydrothermal reaction, wherein the temperature adjusting range of the system is 100-300 ℃. And carrying out hydrothermal reaction under weak acid condition to finish analysis of lithium.
Further, the concentrated water of the first-stage acid-resistant nanofiltration membrane system in the multi-stage acid-resistant nanofiltration membrane system is used as raw material liquid to enter the second-stage acid-resistant nanofiltration membrane system, and the concentrated water of the second-stage acid-resistant nanofiltration membrane system is used as impurity solution to be discharged; the produced water of the secondary acid-resistant nanofiltration membrane system is mixed with the produced water of the primary acid-resistant nanofiltration membrane system, and is taken as raw material water of the tertiary acid-resistant nanofiltration membrane system, and the concentrated water of the tertiary acid-resistant nanofiltration membrane system is mixed with the produced water of the primary separation device of the analytical liquid and enters the primary acid-resistant nanofiltration membrane system. And removing impurity ions in the analysis liquid by adopting multi-stage nanofiltration, so as to realize the purification of lithium ions.
Further, the solid-liquid separation device is any one of a centrifugal filter, a filter press, a caterpillar filter and a disc filter, so that separation of the adsorbent and the solution is realized, and a liquid outlet of the solid-liquid separation device is connected with a feed inlet of the adsorption device. The adsorbent enters a next desorption device, a part of the solution flows back into the adsorption kettle of the previous step, and a part of the solution directly enters the next working procedure of alumina production.
Further, the adsorption device is provided with a stirring system, and the full mixing of the adsorbent and the lithium-containing solution is realized through stirring; the slurry containing the adsorbent is then transported to a solid-liquid separation device by a transport pump at the bottom of the adsorption apparatus.
Furthermore, in the multistage acid-resistant nanofiltration membrane system, the water inlet of the secondary acid-resistant nanofiltration membrane system is connected with pure water, a certain amount of pure water is required to be added, and dilution filtration is performed in the secondary acid-resistant nanofiltration membrane system.
Further, the primary separation device of the analytic liquid is a micro-filtration-level filtering system.
Furthermore, the devices are connected through a pipeline, a pump and a valve, a storage buffer tank is arranged at the joint of each process section, and the output of the feed liquid in each step or process section is realized through the pump.
The beneficial effects of the utility model are as follows:
a system device for analyzing and purifying a lithium-rich adsorbent in alumina production is characterized by comprising an adsorption device, a solid-liquid separation device, a hydrothermal desorption device, an analysis liquid primary separation device and a multi-stage acid-resistant nanofiltration membrane system. The lithium is resolved by utilizing the hydrothermal reaction kettle, so that the resolving efficiency is high, the process is easy to control, the input cost is low, and the equipment is simple. In addition, the multistage nanofiltration system is adopted to remove impurities of lithium, and the acid-resistant nanofiltration membrane is adopted to purify lithium, so that the equipment is simple to control, and the yield of lithium is high. The whole analytic purification system device has the advantages of easy control of the process, high automation degree and high total yield of lithium.
Drawings
FIG. 1 shows a system for resolving and purifying a lithium-rich adsorbent from alumina production in accordance with the present utility model.
1-adsorption device, 2-solid-liquid separation device, 3-hydrothermal analysis attachment device, 4-analysis liquid primary separation device, 5-primary acid-resistant nanofiltration membrane system, 6-secondary acid-resistant nanofiltration membrane system and 7-tertiary acid-resistant nanofiltration membrane system
Detailed Description
The technical scheme of the utility model is further described in detail below with reference to the specific embodiments.
Embodiments of the present utility model are described in detail below, and are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts or parts having the same or similar functions. In the description of the present utility model with reference to the accompanying drawings, it should be understood that the terms "front", "rear", "out", "in", etc. refer to the orientation or positional relationship as shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, rather than indicating or implying a configuration in which the apparatus or location referred to must have a specific orientation, characteristics, and therefore should not be construed as limiting the present utility model.
A system device for analyzing and purifying a lithium-rich adsorbent in alumina production is characterized by comprising an adsorption device, a solid-liquid separation device, a hydrothermal desorption device, an analysis liquid primary separation device and a multi-stage acid-resistant nanofiltration membrane system. The outlet of the adsorption device (1) is connected with the solid-liquid separation device (2), the solid outlet of the solid-liquid separation device (2) is connected with the hydrothermal analysis attaching device (3), the hydrothermal analysis attaching device (3) is connected with the analysis liquid primary separation device (4), and the water outlet of the analysis liquid primary separation device (4) is connected with the multistage acid-resistant nanofiltration membrane system. The hydrothermal analysis attaching device (3) is a hydrothermal reaction kettle, and a stirring part is arranged in the hydrothermal analysis attaching device; the core membrane element of the multistage acid-resistant nanofiltration membrane system is an acid-resistant membrane, the nanofiltration device is of 3 stages, and the produced water of the three-stage acid-resistant nanofiltration membrane system (7) is product liquid.
Specifically, the hydrothermal analysis attaching device (3) is provided with a solid adsorbent feeding port and an aqueous solution feeding port; before the hydrothermal reaction, the pH of the hydrothermal reaction solution is adjusted to be between 0.1 and 2 by adopting a hydrochloric acid solution; in addition, a temperature regulating system is also arranged for regulating the temperature of the analysis device, and the temperature regulating range of the system is 100-300 ℃.
Specifically, concentrated water of a first-stage acid-resistant nanofiltration membrane system (5) in the multi-stage acid-resistant nanofiltration membrane system is taken as raw material liquid to enter a second-stage acid-resistant nanofiltration membrane system (6), and the concentrated water of the second-stage acid-resistant nanofiltration membrane system (6) is taken as impurity solution to be discharged; the produced water of the secondary acid-resistant nanofiltration membrane system (6) is mixed with the produced water of the primary acid-resistant nanofiltration membrane system (5), and is used as raw material water of the tertiary acid-resistant nanofiltration membrane system (7), concentrated water of the tertiary acid-resistant nanofiltration membrane system (7) is mixed with the produced water of the primary separation device (4) of the analytical solution, and the mixture enters the primary acid-resistant nanofiltration membrane system (5).
Specifically, the solid-liquid separation device (2) is any one of a centrifugal filter, a caterpillar filter, a filter press and a disc filter, so that separation of the adsorbent and the solution is realized, and a liquid outlet of the solid-liquid separation device (2) is connected with a feed inlet of the adsorption device (1).
Specifically, the adsorption device (1) is provided with a stirring system, and the full mixing of the adsorbent and the lithium-containing solution is realized through stirring; the slurry containing the adsorbent is then conveyed to a solid-liquid separation device (2) by a conveying pump at the bottom of the adsorption equipment (1).
Specifically, in the multistage acid-resistant nanofiltration membrane system, the water inlet of the secondary acid-resistant nanofiltration membrane system (6) is connected with pure water, a certain amount of pure water is required to be added, and dilution filtration is performed in the secondary acid-resistant nanofiltration membrane system (6).
Specifically, the primary separation device (4) of the analytic solution is a micro-filtration-level filtering system.
Specifically, the devices are connected through a pipeline, a pump and a valve, a storage buffer tank is arranged at the joint of each process section, and the output of the feed liquid in each step or process section is realized through the pump.
The system comprises an adsorption device, a solid-liquid separation device, a hydrothermal desorption device, a desorption liquid primary separation device and a multi-stage acid-resistant nanofiltration membrane system. The lithium is resolved by utilizing the hydrothermal reaction kettle, so that the resolving efficiency is high, the process is easy to control, the input cost is low, and the equipment is simple. In addition, the multistage nanofiltration system is adopted to remove impurities of lithium, and the acid-resistant nanofiltration membrane is adopted to purify lithium, so that the equipment is simple to control, and the yield of lithium is high. The whole analytic purification system device has the advantages of easy control of the process, high automation degree and high total yield of lithium.
The foregoing examples are merely representative of several embodiments of the present utility model, and the detailed description thereof is specific and detailed and thus should not be taken as limiting the scope of the utility model.
Claims (7)
1. The system device for analyzing and purifying the lithium-rich adsorbent in the production of alumina is characterized by comprising an adsorption device, a solid-liquid separation device, a hydrothermal desorption device, an analysis liquid primary separation device and a multi-stage acid-resistant nanofiltration membrane system; wherein the outlet of the adsorption device (1) is connected with the solid-liquid separation device (2), the solid outlet of the solid-liquid separation device (2) is connected with the hydrothermal analysis device (3), the aqueous solution outlet of the hydrothermal analysis device (3) is connected with the primary separation device (4) of the analysis liquid, and the primary separation device (4) of the analysis liquid is connected with the multistage acid-resistant nanofiltration membrane system; the hydrothermal analysis attaching device (3) is a hydrothermal reaction kettle, and a stirring part is arranged in the hydrothermal analysis attaching device; the core membrane element of the multistage acid-resistant nanofiltration membrane system is an acid-resistant membrane, the nanofiltration device is of 3 stages, and the produced water of the three-stage acid-resistant nanofiltration membrane system (7) is product liquid.
2. A system for resolving and purifying a lithium-rich sorbent from alumina production as claimed in claim 1, wherein: the hydrothermal analysis attachment device (3) is provided with a solid adsorbent feeding port and an aqueous solution feeding port; the pH adjusting system is internally provided with a solution, and the pH of the hydrothermal reaction solution is adjusted to be between 0.1 and 2 by adopting a hydrochloric acid solution; in addition, a temperature regulating system is also arranged for regulating the temperature of the analysis device, and the temperature regulating range of the system is 100-300 ℃.
3. A system for resolving and purifying a lithium-rich sorbent from alumina production as claimed in claim 1, wherein: concentrated water of a first-stage acid-resistant nanofiltration membrane system (5) in the multi-stage acid-resistant nanofiltration membrane system is taken as raw material liquid to enter a second-stage acid-resistant nanofiltration membrane system (6), and the concentrated water of the second-stage acid-resistant nanofiltration membrane system (6) is taken as impurity solution to be discharged; the produced water of the secondary acid-resistant nanofiltration membrane system (6) is mixed with the produced water of the primary acid-resistant nanofiltration membrane system (5), and is used as raw material water of the tertiary acid-resistant nanofiltration membrane system (7), concentrated water of the tertiary acid-resistant nanofiltration membrane system (7) is mixed with the produced water of the primary separation device (4) of the analytical solution, and the mixture enters the primary acid-resistant nanofiltration membrane system (5).
4. A system for resolving and purifying a lithium-rich sorbent from alumina production as claimed in claim 1, wherein: the solid-liquid separation device (2) is any one of a centrifugal filter, a caterpillar filter, a filter press and a disc filter, so that the separation of the adsorbent and the solution is realized, and a liquid outlet of the solid-liquid separation device (2) is connected with a feed inlet of the adsorption device (1).
5. A system for resolving and purifying a lithium-rich sorbent from alumina production as claimed in claim 1, wherein: the adsorption device (1) is provided with a stirring system, and the full mixing of the adsorbent and the lithium-containing solution is realized through stirring; the slurry containing the adsorbent is conveyed to the solid-liquid separation device (2) through a conveying pump at the bottom of the adsorption device (1).
6. A system for resolving and purifying a lithium-rich sorbent from alumina production as claimed in claim 1, wherein: the primary separation device (4) of the analysis liquid is a micro-filtration-level filtering system.
7. A system for resolving and purifying a lithium-rich sorbent from alumina production as claimed in claim 1, wherein: the devices are connected through a pipeline, a pump and a valve, a storage buffer tank is arranged at the joint of each process section, and the output of the feed liquid in each step or process section is realized through the pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320718254.1U CN219744173U (en) | 2023-04-03 | 2023-04-03 | Analysis and purification system device of lithium-rich adsorbent in production of alumina |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320718254.1U CN219744173U (en) | 2023-04-03 | 2023-04-03 | Analysis and purification system device of lithium-rich adsorbent in production of alumina |
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| CN219744173U true CN219744173U (en) | 2023-09-26 |
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| CN202320718254.1U Active CN219744173U (en) | 2023-04-03 | 2023-04-03 | Analysis and purification system device of lithium-rich adsorbent in production of alumina |
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