CN218404350U - Device for recycling and extracting lithium by taking lithium ore as raw material - Google Patents
Device for recycling and extracting lithium by taking lithium ore as raw material Download PDFInfo
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- CN218404350U CN218404350U CN202222191419.2U CN202222191419U CN218404350U CN 218404350 U CN218404350 U CN 218404350U CN 202222191419 U CN202222191419 U CN 202222191419U CN 218404350 U CN218404350 U CN 218404350U
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Abstract
The utility model relates to a retrieve and carry out lithium equipment technical field, more specifically relates to a retrieve and carry out device of lithium with lithium ore as raw materials, and the device runs under acid condition completely, need not throw with alkali before acid leachate gets into the system and synthesizes pH value, practices thrift the medicament and throws with the cost, reduces the pollution; the system adopts a special concentration membrane, the salt concentration of the solution can be increased to 280g/l under the condition of reducing the operation pressure, and then the high-concentration lithium solution can be directly subjected to chemical lithium deposition, so that the links of an evaporator are reduced, and the investment and the operation cost are reduced. The system recycles the wastewater discharged by each membrane section as much as possible, improves the lithium yield and simultaneously separates and discharges the wastewater.
Description
Technical Field
The utility model relates to a retrieve and carry lithium equipment technical field, more specifically relates to an use lithium ore to retrieve the device of carrying lithium as the raw materials.
Background
In recent years, with the wide application of new energy electric vehicles, the demand of lithium batteries is increasing.
Compared with a sulfuric acid roasting method, a sulfate roasting method, a chlorination roasting method, a limestone roasting method and a pressure boiling method, the membrane method for extracting lithium has the advantages of good magnesium-lithium separation effect, green and environment-friendly process, no dangerous processes such as high pressure, inflammability, explosiveness and the like, high process safety, short process flow and the like.
Most of the current membrane method lithium extraction processes have the following obvious defects: 1. the lithium extraction system and the used membrane need to be carried out under an alkaline condition, and because the lithium extraction stock solution is mostly acid leachate, alkali needs to be added for pretreatment to neutralize the pH value of the stock solution before extraction or before entering the lithium extraction system, so that the lithium extraction process has the problems of high medicament adding cost and great pollution; 2. the concentration of the lithium solution proposed by the traditional lithium extraction system is not high enough, so that chemical lithium deposition can be carried out only after additional evaporation is carried out, and the lithium extraction system is often connected with an evaporator, so that the investment and operation cost are increased; 3. the general lithium extraction system can only recover partial liquid, which makes the liquid recovery and utilization inefficient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the shortcoming among the prior art, provide a use lithium ore to retrieve the device of carrying lithium as the raw materials.
The purpose of the utility model is realized through the following technical scheme:
a device for recovering and extracting lithium by taking lithium ores as raw materials comprises a raw water tank, a raw water pump, a sand filter, an ultrafiltration device, an ultrafiltration water production tank, a primary nanofiltration water pump, a primary nanofiltration device, a primary nanofiltration water tank, a secondary nanofiltration water pump, a secondary nanofiltration device, a secondary nanofiltration water tank, a primary concentration pump, a primary concentration device, a primary concentration water tank, a secondary concentration pump, a secondary concentration device, a secondary concentration water tank, a tertiary concentration pump and a tertiary concentration device which are sequentially connected;
nanofiltration membranes are respectively arranged in the primary nanofiltration device and the secondary nanofiltration device; the first-stage concentration device, the second-stage concentration device and the third-stage concentration device are respectively provided with a concentration membrane;
the water produced by the secondary nanofiltration device enters the secondary nanofiltration water tank through a secondary nanofiltration water production outlet, and the concentrated water flows back to the ultrafiltration water production tank through a secondary nanofiltration concentrated water outlet; concentrated water of the secondary concentration device enters a secondary concentration water tank through a secondary concentration concentrated water outlet, and produced water flows back to the secondary nanofiltration water tank through a secondary concentration produced water outlet; concentrated water of the third-stage concentration device is discharged through a third-stage concentrated water outlet to obtain a lithium-rich liquid, and produced water flows back to the first-stage concentrated water tank through a third-stage concentrated water outlet.
The utility model discloses above-mentioned device's work flow as follows: the method comprises the steps of primarily treating an acid leaching solution of lithium ore, then feeding the acid leaching solution into a raw water tank, pumping the raw water into a sand filter, removing suspended solid dust and unreacted flocculating agents in the sand filter, then feeding the sand filter into an ultrafiltration device, effectively removing macromolecular organic matters and small particles in the ultrafiltration device, storing the produced water after the acid leaching solution is subjected to ultrafiltration treatment in an ultrafiltration production water tank, and enabling the acid leaching solution to be a soluble salt solution of calcium, magnesium, iron, sodium, lithium, potassium, chloride ions and sulfate radicals.
And then, removing most of divalent ions in the acid leachate in the ultrafiltration water production tank through a primary nanofiltration device, directly discharging concentrated water passing through the primary nanofiltration device, feeding the produced water into the primary nanofiltration water tank, pumping the produced water into a secondary nanofiltration device through a secondary pump, removing residual divalent ions through the secondary nanofiltration device, collecting the produced water passing through the secondary nanofiltration device in a secondary nanofiltration water production tank, and refluxing the concentrated water into the ultrafiltration water production tank for circulation treatment.
The solution in the second-stage nanofiltration water production tank is concentrated through a third-stage membrane, concentrated water of each stage of concentrated membrane enters a next-stage concentrating device (the concentrating device is provided with the concentrated membrane), the concentration of the final third-stage concentrated water reaches 280g/l, lithium can be directly chemically precipitated as a high-concentration lithium solution, the produced water passing through the second-stage concentrating device flows back to the second-stage nanofiltration water production tank, and the produced water passing through the third-stage concentrating device flows back to the first-stage concentrated water tank.
Preferably, the ultrafiltration device is provided with a first ultrafiltration water outlet and a second ultrafiltration water outlet, wherein the first ultrafiltration water outlet directly discharges ultrafiltration concentrated water; the second ultrafiltration water outlet is connected with the ultrafiltration water production tank.
Preferably, the first-stage nanofiltration device is provided with a first nanofiltration water outlet and a second nanofiltration water outlet, wherein the first nanofiltration water outlet directly discharges nanofiltration concentrated water, and the second nanofiltration water outlet is connected with the first-stage nanofiltration water tank.
Preferably, the first concentrated water outlet of the first-stage concentration device directly discharges the first-stage concentrated produced water, and the second concentrated water outlet is connected with the first-stage concentrated water tank.
In the above device, the water produced by the primary concentration device is an acidic desalted water solution, which can be used as an acid solution to treat the lithium ore with acid again, and therefore, preferably, the first concentrated water outlet is further connected to an acid solution tank, and the acid solution is used for acid treatment of the lithium ore.
Preferably, the nanofiltration membrane is an acid-resistant nanofiltration membrane.
More preferably, the aperture of the primary nanofiltration membrane is 0.37-0.49 nm, and the aperture of the secondary nanofiltration membrane is 0.18-0.29 nm.
Preferably, the concentration membrane is an acid-resistant concentration membrane.
More preferably, the pore diameter of the first-stage concentration membrane is less than 0.1nm, the pore diameter of the second-stage concentration membrane is 0.10-0.14 nm, and the pore diameter of the third-stage concentration membrane is 0.14-0.18 nm.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a device for recovering and extracting lithium by taking lithium ore as a raw material, which completely runs under an acidic condition, and does not need to add alkali to synthesize the pH value before an acidic leaching solution enters a system, thereby saving the adding cost of a medicament and reducing pollution; the system adopts a special concentration membrane, the salt concentration of the solution can be increased to 280g/l under the condition of reducing the operation pressure, and then the high-concentration lithium solution can be directly subjected to chemical lithium deposition, so that the links of an evaporator are reduced, and the investment and the operation cost are reduced. The system recycles the wastewater discharged by each membrane section as much as possible, improves the lithium yield and simultaneously separates and discharges the wastewater.
Drawings
FIG. 1 is a schematic connection diagram of a device for recovering and extracting lithium from lithium ore according to the present invention;
reference numerals are as follows: 1-raw water tank; 2-raw water pump; 3-sand filtration; 4-ultrafiltration; 5-ultrafiltration water production tank; 6-first-stage nanofiltration water pump; 7-a first-stage nanofiltration device; 8-a first-stage nanofiltration water tank; 9-a secondary nanofiltration water pump; 10-a secondary nanofiltration device; 11-a secondary nanofiltration water tank; 12-first stage concentration pump; 13-first-stage concentration device; 14-first-stage concentration water tank; 15-a second-stage concentration pump; 16-a secondary concentration device; 17-a secondary concentration water tank; 18-three-stage concentration pump; 19-three-stage concentration device.
Detailed Description
A device for recovering and extracting lithium by taking lithium ore as a raw material comprises a raw water tank 1, a raw water pump 2, a sand filter 3, an ultrafiltration device 4, an ultrafiltration water production tank 5, a primary nanofiltration water pump 6, a primary nanofiltration device 7, a primary nanofiltration water tank 8, a secondary nanofiltration water pump 9, a secondary nanofiltration device 10, a secondary nanofiltration water tank 11, a primary concentration pump 12, a primary concentration device 13, a primary concentration water tank 14, a secondary concentration pump 15, a secondary concentration device 16, a secondary concentration water tank 17, a tertiary concentration pump 18 and a tertiary concentration device 19 which are connected in sequence;
the first-stage nanofiltration device 7 and the second-stage nanofiltration device 10 are respectively provided with nanofiltration membranes, specifically, the nanofiltration membranes are acid-resistant nanofiltration membranes, and the acid-resistant nanofiltration membranes resist pollution, so that calcium, magnesium and sulfate radicals can be separated from a solution to a concentrated water side, and the concentrations of sodium, potassium, lithium and chloride ions on a fresh water side are basically unchanged. In the embodiment, the primary nanofiltration membrane and the secondary nanofiltration membrane are both commercially available acid-resistant nanofiltration membranes, wherein the aperture of the primary nanofiltration membrane is 0.37-0.49 nm, and the aperture of the secondary nanofiltration membrane is 0.18-0.29 nm.
The first-stage concentration device 13, the second-stage concentration device 16 and the third-stage concentration device 19 are respectively provided with a concentration membrane, and specifically, the concentration membrane is an acid-resistant concentration membrane. The first-stage concentration, the second-stage concentration and the third-stage concentration respectively adopt acid-resistant membrane elements with different desalination rates, so that TDS (total dissolved solids) is up to 280g/L, an evaporator is not needed, and the obtained solution can be directly subjected to chemical lithium precipitation; in this embodiment, the first-stage concentration membrane, the second-stage concentration membrane and the third-stage concentration membrane are commercially available acid-resistant concentration membranes, the pore diameter of the first-stage concentration membrane is less than 0.1nm, the pore diameter of the second-stage concentration membrane is 0.10-0.14 nm, and the pore diameter of the third-stage concentration membrane is 0.14-0.18 nm.
An inlet of the secondary nanofiltration device 10 is connected with the secondary nanofiltration water pump 9, and the secondary nanofiltration device 10 is provided with two outlets, so that the produced water passing through the secondary nanofiltration device 10 enters the secondary nanofiltration water tank 11 through a secondary nanofiltration water production outlet, and the concentrated water flows back to the ultrafiltration water production tank 5 through a secondary nanofiltration concentrated water outlet for reuse; an inlet of the secondary concentration device 16 is connected with a secondary concentration pump 15, the secondary concentration device 16 is provided with two outlets, wherein, the concentrated water passing through the secondary concentration device 16 enters a secondary concentration water tank 17 through a secondary concentrated water outlet, and the produced water flows back to the secondary nanofiltration water tank 11 through a secondary concentrated water outlet for reuse; an inlet of the third-stage concentration device 19 is connected with the third-stage concentration pump 18, the third-stage concentration device 19 is provided with two outlets, wherein concentrated water passing through the third-stage concentration device 19 is discharged through the third-stage concentrated water outlet to obtain a lithium-rich solution, and the obtained solution can be directly subjected to chemical lithium precipitation; the produced water passing through the third-stage concentration device 19 flows back to the first-stage concentration water tank 14 through a third-stage concentration water production outlet to be reused.
In this embodiment, the positions of the respective reflux points of the secondary nanofiltration device 10, the secondary concentration device 16 and the tertiary concentration device are selected according to the principle that discharged water is refluxed to a water tank with similar salt concentration for reuse.
In the embodiment, an inlet of the ultrafiltration device 4 is connected with the sand filter 3, the ultrafiltration device 4 is provided with a first ultrafiltration water outlet and a second ultrafiltration water outlet, and the first ultrafiltration water outlet directly discharges ultrafiltration concentrated water; the second ultrafiltration water outlet is connected with the ultrafiltration water production tank 5, so that the acid leachate after ultrafiltration is discharged into the ultrafiltration water production tank 5.
In this embodiment, an inlet of the first-stage nanofiltration device 7 is connected to the first-stage nanofiltration water pump 6, the first-stage nanofiltration device 7 is provided with a first nanofiltration water outlet and a second nanofiltration water outlet, wherein the first nanofiltration water outlet directly discharges concentrated water passing through the first-stage nanofiltration device, and the second nanofiltration water outlet is connected to the first-stage nanofiltration water tank 8, so that the produced water passing through the first-stage nanofiltration device is discharged into the first-stage nanofiltration water tank 8.
In this embodiment, the inlet of the first-stage concentration device 13 is connected to the first-stage concentration pump 12, the first-stage concentration device 13 is provided with a first concentrated water outlet and a second concentrated water outlet, the first concentrated water outlet directly discharges the first-stage concentrated produced water, and the second concentrated water outlet is connected to the first-stage concentrated water tank 14, so that the concentrated water passing through the first-stage concentration device is discharged into the first-stage concentrated water tank 14.
In this embodiment, the produced water passing through the primary concentrating device 13 is an acidic desalted water solution, which can be used as an acid solution to treat the lithium ore with acid again, and therefore, the first concentrated water outlet is further connected to an acid solution tank, and the acid solution is used for acid treatment of the lithium ore.
The utility model discloses above-mentioned device's work flow as follows: the method comprises the steps of primarily treating an acid leaching solution of lithium ore, then pumping the acid leaching solution into a raw water tank, then pumping the acid leaching solution into a sand filter through raw water, removing suspended solid dust and unreacted flocculating agents in the sand filter, then entering an ultrafiltration device, effectively removing macromolecular organic matters and small particles in the ultrafiltration device, storing the produced water of the acid leaching solution subjected to ultrafiltration treatment in an ultrafiltration production water tank, wherein the acid leaching solution at the moment is a soluble salt solution of calcium, magnesium, iron, sodium, lithium, potassium, chloride ions and sulfate radicals.
And then, removing most of divalent ions in the acid leachate in the ultrafiltration water production tank through a primary nanofiltration device, directly discharging concentrated water passing through the primary nanofiltration device, feeding the produced water into the primary nanofiltration water tank, pumping the produced water into a secondary nanofiltration device through a secondary pump, removing residual divalent ions through the secondary nanofiltration device, collecting the produced water passing through the secondary nanofiltration device in a secondary nanofiltration water production tank, and refluxing the concentrated water into the ultrafiltration water production tank for circulation treatment.
The solution in the second-stage nanofiltration water production tank is concentrated through a third-stage membrane, concentrated water of each stage of concentrated membrane enters a next-stage concentration device (a concentration membrane is arranged in the concentration device), the concentration of the final third-stage concentrated water reaches 280g/l, lithium can be directly chemically precipitated as a high-concentration lithium solution, the produced water passing through the second-stage concentration device flows back to the second-stage nanofiltration water production tank, and the produced water passing through the third-stage concentration device flows back to the first-stage concentrated water tank.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The device for recovering and extracting lithium by taking lithium ores as raw materials is characterized by comprising a raw water tank (1), a raw water pump (2), a sand filter (3), an ultrafiltration device (4), an ultrafiltration water production tank (5), a primary nanofiltration water pump (6), a primary nanofiltration device (7), a primary nanofiltration water tank (8), a secondary nanofiltration water pump (9), a secondary nanofiltration device (10), a secondary nanofiltration water tank (11), a primary concentration pump (12), a primary concentration device (13), a primary concentration water tank (14), a secondary concentration pump (15), a secondary concentration device (16), a secondary concentration water tank (17), a tertiary concentration pump (18) and a tertiary concentration device (19) which are connected in sequence;
nanofiltration membranes are respectively arranged in the primary nanofiltration device (7) and the secondary nanofiltration device (10); the first-stage concentration device (13), the second-stage concentration device (16) and the third-stage concentration device (19) are respectively provided with a concentration membrane;
the water produced by the secondary nanofiltration device (10) enters the secondary nanofiltration water tank (11) through a secondary nanofiltration water production outlet, and the concentrated water flows back to the ultrafiltration water production tank (5) through a secondary nanofiltration concentrated water outlet; concentrated water of the secondary concentration device (16) enters a secondary concentration water tank (17) through a secondary concentration concentrated water outlet, and produced water flows back to the secondary nanofiltration water tank (11) through a secondary concentration produced water outlet; concentrated water of the third-stage concentration device (19) is discharged through a third-stage concentrated water outlet to obtain a lithium-rich liquid, and produced water flows back to the first-stage concentrated water tank (14) through a third-stage concentrated water outlet.
2. The device for recovering and extracting lithium by taking lithium ore as a raw material according to claim 1, wherein the ultrafiltration device (4) is provided with a first ultrafiltration water outlet and a second ultrafiltration water outlet, wherein the first ultrafiltration water outlet directly discharges ultrafiltration concentrated water; the second ultrafiltration water outlet is connected with an ultrafiltration water generating tank (5).
3. The device for recovering and extracting lithium from lithium ore as raw material according to claim 1, wherein the primary nanofiltration device (7) is provided with a first nanofiltration water outlet and a second nanofiltration water outlet, wherein the first nanofiltration water outlet directly discharges nanofiltration concentrated water, and the second nanofiltration water outlet is connected with the primary nanofiltration water tank (8).
4. The device for recovering and extracting lithium by taking lithium ore as raw material according to claim 1, wherein the first concentration water outlet of the primary concentration device (13) directly discharges primary concentration produced water, and the second concentration water outlet is connected with the primary concentration water tank (14).
5. The device for recovering and extracting lithium from lithium ore as claimed in claim 4, wherein the first concentrated water outlet is further connected to an acid solution tank, and the acid solution is used for acid treatment of lithium ore.
6. The apparatus for recovering and extracting lithium from lithium ore as claimed in claim 1, wherein the nanofiltration membrane is an acid-resistant nanofiltration membrane.
7. The device for recycling and extracting lithium from lithium ores as claimed in claim 6, wherein the aperture of the nanofiltration membrane of the primary nanofiltration device (7) is 0.37-0.49 nm, and the aperture of the nanofiltration membrane of the secondary nanofiltration device (10) is 0.18-0.29 nm.
8. The apparatus for recovering and extracting lithium from lithium ore as claimed in claim 1, wherein the concentration membrane is an acid-resistant concentration membrane.
9. The apparatus for recovering and extracting lithium from lithium ore as claimed in claim 8, wherein the aperture of the concentrating membrane of the first concentrating device (13) is less than 0.1nm, the aperture of the concentrating membrane of the second concentrating device (16) is 0.10-0.14 nm, and the aperture of the concentrating membrane of the third concentrating device (19) is 0.14-0.18 nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222191419.2U CN218404350U (en) | 2022-08-19 | 2022-08-19 | Device for recycling and extracting lithium by taking lithium ore as raw material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222191419.2U CN218404350U (en) | 2022-08-19 | 2022-08-19 | Device for recycling and extracting lithium by taking lithium ore as raw material |
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| CN218404350U true CN218404350U (en) | 2023-01-31 |
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| CN202222191419.2U Active CN218404350U (en) | 2022-08-19 | 2022-08-19 | Device for recycling and extracting lithium by taking lithium ore as raw material |
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Address after: No. 899, Songying Road, Qingpu District, Shanghai, 200001 Patentee after: Shanghai Weisaibo Environmental Technology Co.,Ltd. Address before: 200001 No. 899, Songying Road, Huangpu District, Shanghai Patentee before: Shanghai Weisaibo Environmental Technology Co.,Ltd. |
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