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Lithium extraction from brine
Lithium has important application in national defense industry, which was called “energy metal of 21st century”.
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Working principle
Feature
Parameter
Describe

 
Lithium has important application in national defense industry, which was called “energy metal of 21st century”. In recent years, lithium’s demand as battery raw material is increasingly, Research and development and utilization of lithium is imminent.
There are many kinds of metal ion in salt lake bittern, how to extract lithium is an important topic research at the moment. Solvent extraction is a valid technology to extract all kinds of metal in bittern, it wih high separation rate, simple technology and equipment, continuous operation, easy to achieve automatic control and so on advantages, it was considered one of the most promising method that extracting lithium from high magnesium lithium ratio brine.
At the present, cause of the different of salt lake company their own element ratio, that the extraction systems are different, for example, some company regard TBP as extractant, ferric trichloride as common extractant, sulfonated kerosene as diluent, and Li and Fe extraction together enter in organic phase with LiFeCl4 form, separation with a amount of MgCl2 in aqueous phase and other metal and so on. Whatever any extraction system, they are all high requirement for extraction equipment, especially in the big scale production line, equipments’stable operation affect the production and economic benefit greatly.
According to the market extractor disadvantage, CWL-M series extractor is our new development, and with out own proprietary intellectual property rights, patent number is ZL2014205865573, The equipment takes shape with whole fluorine material, strong resistance corrosion; at the same time, under the same capacity condition, the power consumption is only 10%~30% of traditional annular type, and short retention time, high speed separation, high extraction efficiency, save invest and solvent recycling. The worth mentioning that our group improve and upgrade the technology of extracting lithium from salt lake brine, to ensure the stable operation of high yield industrial lithium carbonate production line, reach output and standard.
Process of Lithium extraction from brine:
Technology description:
Extraction ingredient: Extracting lithium, boron, magnesium, iodine, bromine from brine and other elements.
Processing capacity: We could meet 1000-10000T/Y lithium carbonate production line.
Structure material: SS304/316L/904L,PP,PVC,Polytef,Titanium alloy etc.

Customization or not: Yes
If supply small test or pilot-plant test: Yes
Centrifugal Extractor Working Pinciple:
1. Mixing and mass transfer process:
Light and heavy liquor enter in the annulus mixed zone proportionally and from two different feed pipe orifice respectively, which formed by bowl and shell, with the help of bowl’s rotation, the two phases through turbine disc and impeller mixing and dispersing quickly, after mass transfer completely, to finish mass transfer process.
2. Two phases separation process
With the eddy-current disc help, mixture enter in bowl, at the compartment formed by board, the mixture is quickly synchronized with the bowl, under the action of centrifugal force, the larger density liquor moving away from the bowl center to the wall gradually in the upward flow; and the small density liquor doing the opposite, after clarification, two liquids enter into collection chamber with their own weir plate respectively, and drawn out by tigella, to finish the separation process.
Extractor advantages:
  Separation effect is obvious and large handling capacity;

●  Two phase materials contact with short time, and save extraction agent consumption and save cost;

●  High mass transfer rate, high stage efficiency, convenient start and stop, it can not break balance when stopped.

●  Cover small area, the cost of comprehensive investment is low.

●  Well-adapted, good flexibility, with intermittent operation, or single operation, or continuous counter current operation, and there is no need to add interstage pump.
Centrifugal Extractor Specification:
 

Model 

 Bowl diameter
(mm)

Mixture flux(l/h)

Pipe diameter
(mm)

Power(kw)

Dimension(mm)

Weight(kg)

CWL-25-M

25

10

φ10

0.18

270*200*760

10

CWL-50-M

50

50

DN20

0.18

400*400*800

18

CWL-150-M

150

1000

DN40

0.75

620*630*1150

120

CWL-250-M

250

3000

DN50

0.75-2.5

750*750*1400

460

CWL-350-M

350

8000

DN65

1.5-4

950*950*1688

680

CWL-450-M

450

15000

DN80

3-5.5

1000*1000*1800

880

CWL-550-M

550

30000

DN100

4.-7.5

1200*1200*1760

1100

CWL-650-M

650

60000

DN150

4-7.5

1350*1350*1960

1800

CWL-850-M

850

150000

DN200

7.5-15

1500*1500*2100

22

1. Equipment material will be chosen according to the feed physico-chemical property, common used SS304/316L/904L, common composite material, fluoride material and so on;
2. Above table is general parameter, real device has a little difference, please refer to the matched technological manual;
3. Above flux is under ideal condition, ratio of oil and water is their flux sum when 1:1.

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