CN108658100A - A kind of new process and equipment of salt lake bittern production lithium chloride - Google Patents
A kind of new process and equipment of salt lake bittern production lithium chloride Download PDFInfo
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- CN108658100A CN108658100A CN201710679001.7A CN201710679001A CN108658100A CN 108658100 A CN108658100 A CN 108658100A CN 201710679001 A CN201710679001 A CN 201710679001A CN 108658100 A CN108658100 A CN 108658100A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D15/00—Lithium compounds
- C01D15/04—Halides
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- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses new processes and equipment that a kind of salt lake bittern produces lithium chloride, including full chamber bed, middle-end at the top of the full chamber bed offers enterprising material mouth, the left side of the full chamber bed offers resin inlet and resin outlet successively from top to bottom, the upper end of the full chamber bed inner cavity is installed with upper layer liquid distributor, the middle-end of the inner cavity is filled with adsorbent, and the lower end of the full chamber bed inner cavity is installed with lower layer's liquid distributor, and the middle-end of the full chamber bed bottom offers lower feed inlet.The present invention is using salt lake bittern as raw material, using aluminium system molecular sieve as adsorbent, using the full chamber bed of extraordinary liquid distributor as core process and on the basis of equipping, produces the new technology route of qualified lithium chloride solution, which realizes from 300~600:It is 3~6 that Mg/Li ratio is made in 1 old halogen:1 lithium chloride qualifying liquid, qualified lithium chloride raw material is provided for follow-up lithium carbonate or other lithium products, and guarantee is provided for recycling for saline lake lithium resource.
Description
Technical field
The present invention relates to lithium chloride production technical field, the specially a kind of new process and dress of salt lake bittern production lithium chloride
It is standby.
Background technology
Currently, the main production process of lithium chloride has transformation approach, solvent extraction, ionic adsorption exchange process, salting out method, lithium
Salt transformation approach, freezing, liquid-film method etc., conversion method be broadly divided into the direct transformation approach of ore, lithium carbonate or lithium hydroxide transformation approach,
Lithium sulfate transformation approach, lithium hydroxide direct oxidation method, the production of China's major part lithium chloride are converted using lithium carbonate or lithium hydroxide
Method；Ionic adsorption exchange process is mainly used for extracting lithium in brine, seawater and geothermal brine, and the adsorbent (exchanger) developed is main
To include hydroxide aluminium profiles adsorbent, manganese dioxide adsorbent, titanium dioxide lithium adsorbent and the sour adsorbent of compound ladder, apply
Extract the mainly compound metaantimmonic acid adsorbent on lithium chloride.
Salt lake carries lithium and refers to the extraction lithium from the salt lake bittern containing lithium and produce lithium product, and salt lake bittern carries lithium and is typically passed through
Salt pan solar evaporation, obtain stage by stage different salts, salting liquid purification etc. the stages, finally by lithium salts from solution separation and Extraction,
Required lithium salts product is obtained, it is simple for process, at low cost from extracting lithium from salt lake brine, lithium ore production lithium is gradually replaced, according to system
Meter, salt lake bittern lithium resource reserves account for about the 70~80% of lithium resource total amount, therefore salt lake bittern extraction lithium production lithium carbonate will
It as the main direction of lithium salts production, scans the country and extracts lithium process from salt lake bittern, mainly there is the precipitation method, extraction
Method, ion exchange adsorption, carbonizatin method, calcining leaching method and electroosmose process etc., the wherein precipitation method, extraction, ion-exchange absorption
Attached method and carbonizatin method research are wide deep, are the methods of main salt lake bittern extraction lithium, and the great advantage of ionic adsorption method is
All have an enormous advantage from economical and environmentally friendly, and it is simple for process, the rate of recovery is high, selectivity is good, the key of this method is to want
Study the adsorbent of function admirable, it is desirable that adsorbent has lithium excellent Selective adsorption, largely total in brine to exclude
The interference of the alkali metal, alkaline-earth metal ions deposited, the absorption of adsorbent and elution property will be stablized, and fairly large operation is suitble to
It uses.
The incorporated Qinghai Saltlake Fozhao Lake Lithium Co., Ltd. of display drivers of Salt Lake Industry, Qinghai utilizes
Lithium in the low lithium type brine of the high magnesium of lithium adsorbent selective absorption, completes preliminary separating magnesium and lithium (Mg/Li ratio 500:1 or more
It is high), it is simultaneously synthesizing go out the lithium adsorbent of function admirable, the adsorbent can exclude the alkali metal largely coexisted in brine, alkaline earth
The interference of metal ion, the lithium ion in selective absorption brine, its performance indicator is all in nearly operation more than 3 years for the adsorbent
Target call is can reach, secondly the absorption of adsorbent and desorption performance are stablized, and are suitble to operate on a large scale, preparation method
Simply, cheap, environmentally safe, but because salt lake puies forward absorption bed process and the process optimization technique etc. of lithium
In development phase, do not have referential successful experience, improves the absorption property and efficiency of self-control adsorbent, optimizing process and work
Skill is equipped, and is put forward lithium process efficiency and is reduced production cost, is always that each brine produces lithium carbonate enterprise for resource
The emphasis of research and development.Patent of the present invention provides one kind using aluminium system molecular sieve as core adsorbent, with the full chamber bed of extraordinary liquid distributor
For the technology of Core equipment, the performance and efficiency of adsorbent can be greatly improved than traditional absorption method, life is greatly lowered
Produce cost.
Invention content
The purpose of the present invention is to provide new processes and equipment that a kind of salt lake bittern produces lithium chloride, to solve the above-mentioned back of the body
The problem of being proposed in scape technology.
To achieve the above object, the present invention provides the following technical solutions：A kind of new process of salt lake bittern production lithium chloride
And equipment, including full chamber bed, the middle-end at the top of the full chamber bed offer enterprising material mouth, the left side of the full chamber bed is from top to bottom
Resin inlet and resin outlet are offered successively, and the upper end of the full chamber bed inner cavity is installed with upper layer liquid distributor, described interior
The middle-end of chamber is filled with adsorbent, and the lower end of the full chamber bed inner cavity is installed with lower layer's liquid distributor, the full chamber bed bottom
Middle-end offer lower feed inlet.
Preferably, production technology includes the following steps：
A, mode of operation：The technique is using continuous operation, i.e., by the data-optimized technique and unit scale of technology Calculation,
Preferred mode of operation realizes industrialized unit continuous operation；
B, raw material forms：(a) salt lake bittern, wherein：Li+Concentration 0.01~0.2g/L, Mg2+Concentration 30~50g/L, Na+
Concentration 30~45g/L, K+Concentration 9~14g/L, Cl-200~300g/L of concentration；(b) salt lake bittern carries old halogen solution after potassium,
In：Li+Concentration 0.25~0.6g/L, Mg2+Concentration 100~120g/L, Na+Concentration 0.1~0.2g/L, Cl-300~400g/ of concentration
L。
C, technique and technical equipment：It uses self-control aluminium system's adsorbent of molecular sieve for core adsorbent, cloth is designed using special type
The full chamber bed of liquid device is core technology equipment, by adsorbing, being segmented washing, segmentation desorption, is made 3:1~6:1 conjunction
Lattice lithium chloride solution；
D, product：By the innovation technique and equipment, low Mg/Li ratio lithium chloride qualifying liquid, lithium chloride qualifying liquid group can be made
At as follows：Li+Concentration 0.4~0.9g/L, Mg2+Concentration 0.5~8.0g/L, Na+Concentration 0.01~0.2g/L, Cl-Concentration 2~
20g/L；
E, equivalent and yield are adsorbed：Yield >=50% of lithium chloride in brine；Lithium adsorbent adsorbs equivalent 1.8-2.7g/
kg；Washing process loss late 12~30%；
F, the raising and optimization of technological parameter：Compared with traditional absorbing process, adsorbent adsorbs equivalent and improves 15~30%；
Washing loss reduces by 10~25%；Qualifying liquid lithium concentration improves 15~30%；
G, the chloride containing lithium that lithium technique is extracted from salt lake bittern and preliminary exquisiteness obtains is carried with ion exchange adsorption to close
Lattice liquid, from salt lake bittern or from salt lake bittern carry potassium after old halogen solution 300:1~600:In 1 old halogen, lithium chloride is realized
Selective absorption, washing and desorption, it is 3 that Mg/Li ratio, which is made,:1~6:1 lithium chloride qualifying liquid is follow-up lithium carbonate or other lithiums
Product provides qualified lithium chloride raw material.
Preferably, technical solution includes following aspect：
1) suction equipped using aluminium system molecular sieve as adsorbent, by core technology of the full chamber bed of extraordinary liquid distributor, is used
The full chamber bed technology of attached method extractive technique, use includes but not limited to uplink full chamber bed technology, downlink full chamber bed technology；
2), the extraordinary liquid distributor used is customized according to self-control aluminium system's absorbent particles size and distribution, extraordinary liquid distributor
Selectivity uniformly cloth liquid and current-limiting function can be achieved, improve the absorption, washing and desorption efficiency of full chamber bed；
3), the extraordinary liquid distributor used according to brine fluid mechanical characteristic and absorption, washing, desorption technical process flow velocity and
Distribution character requires design to calculate；The liquid distributor that different uniformly cloth liquid functions are respectively adopted in full chamber bed adsorption tower up and down carrys out cloth liquid,
Liquid distributor structure type is using alternative mobile porous uniform cloth liquid mode；
4), the full chamber bed used does not use inert filler to fill, technical process can realize just washing, the functions such as backwash, online
The rinsing and screening for realizing tiny and fine crushing absorbent powder improve the efficiency and efficiency of adsorbent bed；
5), adsorption process flow control is in 5~8m/hr；Adsorption temp is controlled at 10~25 DEG C；
6), washing process flow control is in 10~20m/hr；Wash temperature is controlled at 10~25 DEG C；Flow control 10~
20m/hr, desorption flow control is in 10~20m/hr；
7), desorption process flow control is in 10~20m/hr；Desorption temperature is controlled at 20~40 DEG C；
8), washing is divided into the washing of four steps, three step desorptions；Wash high magnesium solution discharge, low magnesium solution reuse；Desorption process is high
Lithium solution recycles, and low lithium solution is applied mechanically, to realize the function of reducing lithium loss, reduce water consumption, improve yield；
9), washing process is washed using 5~10% sodium chloride solutions, washes away adsorption tower residual magnesium ion and adsorbent surface
Magnesium ion；
10), washing process is washed using light salt brine or desalination solution, washes away adsorption tower residual magnesium ion and adsorbent table
Face magnesium ion；
11), washing process is equipped with online conductivity meter, and on-line monitoring washing water quality controls washing quality；
12), absorption, washing, desorption process have been all made of automatic mode operation, and each operational parameter control can be according to next
The realizations such as material characteristic, calculated yield are automatically entered and are controlled.
Preferably, the mode of operation of the step A is continuous operation, i.e., is advised by data-optimized each device of technology Calculation
Mould, preferred mode of operation, the continuous operation of realization.
Preferably, low Mg/Li ratio lithium chloride qualifying liquid, chlorination can be made by the innovation technique and equipment in the step A
Lithium qualifying liquid composition is as follows：Li+Concentration 0.4~0.9g/L, Mg2+Concentration 0.5~8.0g/L, Na+Concentration 0.01~0.2g/L, Cl-
2~20g/L of concentration.
Preferably, from Mg/Li ratio from 300~600 in the step A:In 1 old halogen realize lithium chloride selective absorption,
Washing and desorption, it is 3~6 that Mg/Li ratio, which is made,:1 lithium chloride qualifying liquid provides qualification for follow-up lithium carbonate or other lithium products
Lithium chloride raw material.
Preferably, compared with traditional absorbing process, adsorbent adsorbs equivalent and improves 15~30% the step A；Washing damage
Losing reduces by 10~25%；Qualifying liquid lithium concentration improves 15~30%.
Preferably, lithium chloride single yield in the old halogen of step D：45~60%；Lithium adsorbent absorption equivalent 1.8~
2.7g/kg；Washing process loss late：12~30%；Qualifying liquid lithium concentration：400~900mg/L.
Compared with prior art, beneficial effects of the present invention are as follows：
The present invention is using salt lake bittern as raw material, using aluminium system molecular sieve as adsorbent, using the full chamber bed of extraordinary liquid distributor as core
On the basis of heart technique and equipment, the new technology route of qualified lithium chloride solution is produced, which realizes from 300~600:1
It is 3~6 that Mg/Li ratio is made in old halogen:1 lithium chloride qualifying liquid provides qualified chlorination for follow-up lithium carbonate or other lithium products
Lithium raw material provides guarantee for recycling for saline lake lithium resource.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is present invention process flow diagram.
In figure：1 full chamber bed, 2 adsorbents, 3 enterprising material mouths, 4 times feed inlets, 5 resin outlets, 6 resin inlets, 7 lower layer's cloth
Liquid device, 8 upper layer liquid distributors.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, a kind of salt lake bittern produces the new process and equipment of lithium chloride, including full chamber bed 1, full chamber bed 1
The middle-end at top offers enterprising material mouth 3, and the left side of full chamber bed 1 offers resin inlet 6 and resin outlet successively from top to bottom
5, the upper end of 1 inner cavity of full chamber bed is installed with upper layer liquid distributor 8, and the middle-end of inner cavity is filled with adsorbent 2,1 inner cavity of full chamber bed
Lower end be installed with lower layer's liquid distributor 7, the middle-end of 1 bottom of full chamber bed offers lower feed inlet 4.
Its production technology includes the following steps：
A, mode of operation：The technique is using continuous operation, i.e., by the data-optimized technique and unit scale of technology Calculation,
Preferred mode of operation realizes industrialized unit continuous operation；
B, raw material forms：(a) salt lake bittern, wherein：Li+Concentration 0.01~0.2g/L, Mg2+Concentration 30~50g/L, Na+
Concentration 30~45g/L, K+Concentration 9~14g/L, Cl-200~300g/L of concentration；(b) salt lake bittern carries old halogen solution after potassium,
In：Li+Concentration 0.25~0.6g/L, Mg2+Concentration 100~120g/L, Na+Concentration 0.1~0.2g/L, Cl-300~400g/ of concentration
L。
C, technique and technical equipment：It uses self-control aluminium system's adsorbent of molecular sieve for core adsorbent, cloth is designed using special type
The full chamber bed of liquid device is core technology equipment, by adsorbing, being segmented washing, segmentation desorption, is made 3:1~6:1 conjunction
Lattice lithium chloride solution；
D, product：By the innovation technique and equipment, low Mg/Li ratio lithium chloride qualifying liquid, lithium chloride qualifying liquid group can be made
At as follows：Li+Concentration 0.4~0.9g/L, Mg2+Concentration 0.5~8.0g/L, Na+Concentration 0.01~0.2g/L, Cl-Concentration 2~
20g/L；
E, equivalent and yield are adsorbed：Yield >=50% of lithium chloride in brine；Lithium adsorbent adsorbs equivalent 1.8-2.7g/
kg；Washing process loss late 12~30%；
F, the raising and optimization of technological parameter：Compared with traditional absorbing process, adsorbent adsorbs equivalent and improves 15~30%；
Washing loss reduces by 10~25%；Qualifying liquid lithium concentration improves 15~30%；
G, the chloride containing lithium that lithium technique is extracted from salt lake bittern and preliminary exquisiteness obtains is carried with ion exchange adsorption to close
Lattice liquid, from salt lake bittern or from salt lake bittern carry potassium after old halogen solution 300:1~600:In 1 old halogen, lithium chloride is realized
Selective absorption, washing and desorption, it is 3 that Mg/Li ratio, which is made,:1~6:1 lithium chloride qualifying liquid is follow-up lithium carbonate or other lithiums
Product provides qualified lithium chloride raw material.
Its technical solution includes following aspect：
1) suction equipped using aluminium system molecular sieve as adsorbent, by core technology of the full chamber bed of extraordinary liquid distributor, is used
The full chamber bed technology of attached method extractive technique, use includes but not limited to uplink full chamber bed technology, downlink full chamber bed technology；
2), the extraordinary liquid distributor used is customized according to self-control aluminium system's absorbent particles size and distribution, extraordinary liquid distributor
Selectivity uniformly cloth liquid and current-limiting function can be achieved, improve the absorption, washing and desorption efficiency of full chamber bed；
3), the extraordinary liquid distributor used according to brine fluid mechanical characteristic and absorption, washing, desorption technical process flow velocity and
Distribution character requires design to calculate；The liquid distributor that different uniformly cloth liquid functions are respectively adopted in full chamber bed adsorption tower up and down carrys out cloth liquid,
Liquid distributor structure type is using alternative mobile porous uniform cloth liquid mode；
4), the full chamber bed used does not use inert filler to fill, technical process can realize just washing, the functions such as backwash, online
The rinsing and screening for realizing tiny and fine crushing absorbent powder improve the efficiency and efficiency of adsorbent bed；
5), adsorption process flow control is in 5~8m/hr；Adsorption temp is controlled at 10~25 DEG C；
6), washing process flow control is in 10~20m/hr；Wash temperature is controlled at 10~25 DEG C；Flow control 10~
20m/hr, desorption flow control is in 10~20m/hr；
7), desorption process flow control is in 10~20m/hr；Desorption temperature is controlled at 20~40 DEG C；
8), washing is divided into the washing of four steps, three step desorptions；Wash high magnesium solution discharge, low magnesium solution reuse；Desorption process is high
Lithium solution recycles, and low lithium solution is applied mechanically, to realize the function of reducing lithium loss, reduce water consumption, improve yield；
9), washing process is washed using 5~10% sodium chloride solutions, washes away adsorption tower residual magnesium ion and adsorbent surface
Magnesium ion；
10), washing process is washed using light salt brine or desalination solution, washes away adsorption tower residual magnesium ion and adsorbent table
Face magnesium ion；
11), washing process is equipped with online conductivity meter, and on-line monitoring washing water quality controls washing quality；
12), absorption, washing, desorption process have been all made of automatic mode operation, and each operational parameter control can be according to next
The realizations such as material characteristic, calculated yield are automatically entered and are controlled.
The mode of operation of step A is continuous operation, that is, passes through data-optimized each unit scale of technology Calculation, preferred operations
Mode, the continuous operation of realization.
Low Mg/Li ratio lithium chloride qualifying liquid, lithium chloride qualifying liquid composition can be made by the innovation technique and equipment in step A
It is as follows：Li+Concentration 0.4~0.9g/L, Mg2+Concentration 0.5~8.0g/L, Na+Concentration 0.01~0.2g/L, Cl-2~20g/ of concentration
L。
From Mg/Li ratio from 300~600 in step A:Selective absorption, washing and the desorption of lithium chloride are realized in 1 old halogen,
It is 3~6 that Mg/Li ratio, which is made,:1 lithium chloride qualifying liquid provides qualified lithium chloride original for follow-up lithium carbonate or other lithium products
Material.
Compared with traditional absorbing process, adsorbent adsorbs equivalent and improves 15~30% step A；Washing loss reduction by 10~
25%；Qualifying liquid lithium concentration improves 15~30%.
Lithium chloride single yield in the old halogen of step D：45~60%；Lithium adsorbent adsorbs 1.8~2.7g/kg of equivalent；Washing
Process losses rate：12~30%；Qualifying liquid lithium concentration：400~900mg/L.
In use, using salt lake bittern as raw material, using aluminium system molecular sieve as adsorbent, using the full chamber bed of extraordinary liquid distributor as core
On the basis of heart technique and equipment, the new technology route of qualified lithium chloride solution is produced, which realizes from 300~600:1
It is 3~6 that Mg/Li ratio is made in old halogen:1 lithium chloride qualifying liquid provides qualified chlorination for follow-up lithium carbonate or other lithium products
Lithium raw material provides guarantee for recycling for saline lake lithium resource.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of new process and equipment of salt lake bittern production lithium chloride, including full chamber bed (1), it is characterised in that：The full room
Middle-end at the top of bed (1) offers enterprising material mouth (3), the left side of the full chamber bed (1) offer successively from top to bottom resin into
Mouth (6) and resin outlet (5), the upper end of full chamber bed (1) inner cavity are installed with upper layer liquid distributor (8), the inner cavity
Middle-end is filled with adsorbent (2), and the lower end of full chamber bed (1) inner cavity is installed with lower layer's liquid distributor (7), the full chamber bed
(1) middle-end of bottom offers lower feed inlet (4).
2. the new process and equipment of a kind of salt lake bittern production lithium chloride according to claim 1, it is characterised in that：It is given birth to
Production. art includes the following steps：
A, mode of operation：The technique is using continuous operation, i.e., by the data-optimized technique and unit scale of technology Calculation, preferably
Mode of operation realizes industrialized unit continuous operation；
B, raw material forms：(a) salt lake bittern, wherein：Li+Concentration 0.01~0.2g/L, Mg2+Concentration 30~50g/L, Na+Concentration 30
~45g/L, K+Concentration 9~14g/L, Cl-200~300g/L of concentration；(b) salt lake bittern carries old halogen solution after potassium, wherein：Li+It is dense
Spend 0.25~0.6g/L, Mg2+Concentration 100~120g/L, Na+Concentration 0.1~0.2g/L, Cl-300~400g/L of concentration；
C, technique and technical equipment：It uses self-control aluminium system's adsorbent of molecular sieve for core adsorbent, liquid distributor is designed using special type
Full chamber bed be core technology equipment, by adsorbing, being segmented washing, segmentation desorption, be made 3:1~6:1 qualified chlorine
Change lithium solution；
D, product：By the innovation technique and equipment, low Mg/Li ratio lithium chloride qualifying liquid can be made, lithium chloride qualifying liquid forms such as
Under：Li+Concentration 0.4~0.9g/L, Mg2+Concentration 0.5~8.0g/L, Na+Concentration 0.01~0.2g/L, Cl-2~20g/L of concentration；
E, equivalent and yield are adsorbed：Yield >=50% of lithium chloride in brine；Lithium adsorbent adsorbs equivalent 1.8-2.7g/kg；
Washing process loss late 12~30%；
F, the raising and optimization of technological parameter：Compared with traditional absorbing process, adsorbent adsorbs equivalent and improves 15~30%；Washing
Loss reduces by 10~25%；Qualifying liquid lithium concentration improves 15~30%；
G, the chloride containing lithium qualifying liquid that lithium technique is extracted from salt lake bittern and preliminary exquisiteness obtains is carried with ion exchange adsorption,
From salt lake bittern or from salt lake bittern carry potassium after old halogen solution 300:1~600:In 1 old halogen, the selectivity of lithium chloride is realized
Absorption, washing and desorption, it is 3 that Mg/Li ratio, which is made,:1~6:1 lithium chloride qualifying liquid carries for follow-up lithium carbonate or other lithium products
For qualified lithium chloride raw material.
3. the new process and equipment of a kind of salt lake bittern production lithium chloride according to claim 1, it is characterised in that：Its skill
Art scheme includes following aspect：
1) absorption method equipped using aluminium system molecular sieve as adsorbent, by core technology of the full chamber bed of extraordinary liquid distributor, is used
The full chamber bed technology of extractive technique, use includes but not limited to uplink full chamber bed technology, downlink full chamber bed technology；
2), the extraordinary liquid distributor used is customized according to self-control aluminium system's absorbent particles size and distribution, and extraordinary liquid distributor can be real
The now uniform cloth liquid of selectivity and current-limiting function, improve the absorption, washing and desorption efficiency of full chamber bed；
3), the extraordinary liquid distributor used is according to brine fluid mechanical characteristic and absorption, washing, desorption technical process flow velocity and distribution
Characteristic requirements design calculates；The liquid distributor that different uniformly cloth liquid functions are respectively adopted in full chamber bed adsorption tower up and down comes cloth liquid, cloth liquid
Device structure type is using alternative mobile porous uniform cloth liquid mode；
4), the full chamber bed used does not use inert filler to fill, technical process can realize just washing, the functions such as backwash, canbe used on line
The rinsing and screening of tiny and fine crushing absorbent powder improve the efficiency and efficiency of adsorbent bed；
5), adsorption process flow control is in 5~8m/hr；Adsorption temp is controlled at 10~25 DEG C；
6), washing process flow control is in 10~20m/hr；Wash temperature is controlled at 10~25 DEG C；Flow control is in 10~20m/
Hr, desorption flow control is in 10~20m/hr；
7), desorption process flow control is in 10~20m/hr；Desorption temperature is controlled at 20~40 DEG C；
8), washing is divided into the washing of four steps, three step desorptions；Wash high magnesium solution discharge, low magnesium solution reuse；The high lithium of desorption process is molten
Liquid recycles, and low lithium solution is applied mechanically, to realize the function of reducing lithium loss, reduce water consumption, improve yield；
9), washing process using 5~10% sodium chloride solutions wash, wash away adsorption tower residual magnesium ion and adsorbent surface magnesium from
Son；
10), washing process is washed using light salt brine or desalination solution, washes away adsorption tower residual magnesium ion and adsorbent surface magnesium
Ion；
11), washing process is equipped with online conductivity meter, and on-line monitoring washing water quality controls washing quality；
12), absorption, washing, desorption process have been all made of automatic mode operation, and each operational parameter control can be according to supplied materials spy
The realizations such as property, calculated yield are automatically entered and are controlled.
4. the new process and equipment of a kind of salt lake bittern production lithium chloride according to claim 2, it is characterised in that：It is described
The mode of operation of step A is continuous operation, i.e., by data-optimized each unit scale of technology Calculation, preferred mode of operation is real
Existing continuous operation.
5. the new process and equipment of a kind of salt lake bittern production lithium chloride according to claim 2, it is characterised in that：It is described
Low Mg/Li ratio lithium chloride qualifying liquid can be made by the innovation technique and equipment in step A, and lithium chloride qualifying liquid composition is as follows：Li+
Concentration 0.4~0.9g/L, Mg2+Concentration 0.5~8.0g/L, Na+Concentration 0.01~0.2g/L, Cl-2~20g/L of concentration.
6. the new process and equipment of a kind of salt lake bittern production lithium chloride according to claim 2, it is characterised in that：It is described
From Mg/Li ratio from 300~600 in step A:Selective absorption, washing and the desorption that lithium chloride is realized in 1 old halogen, are made magnesium lithium
Than being 3~6:1 lithium chloride qualifying liquid provides qualified lithium chloride raw material for follow-up lithium carbonate or other lithium products.
7. the new process and equipment of a kind of salt lake bittern production lithium chloride according to claim 2, it is characterised in that：It is described
Compared with traditional absorbing process, adsorbent adsorbs equivalent and improves 15~30% step A；Washing loss reduces by 10~25%；It is qualified
Liquid lithium concentration improves 15~30%.
8. the new process and equipment of a kind of salt lake bittern production lithium chloride according to claim 2, it is characterised in that：It is described
Lithium chloride single yield in the old halogen of step D：45~60%；Lithium adsorbent adsorbs 1.8~2.7g/kg of equivalent；Washing process loses
Rate：12~30%；Qualifying liquid lithium concentration：400~900mg/L.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264067A (en) * | 2018-03-22 | 2018-07-10 | 何朋飞 | A kind of new process and equipment of salt lake bittern production lithium chloride |
| CN112758961A (en) * | 2021-01-07 | 2021-05-07 | 青海盐湖工业股份有限公司 | Lithium chloride production process and system |
| CN115433839A (en) * | 2022-10-12 | 2022-12-06 | 广东邦普循环科技有限公司 | Lithium extraction device capable of automatically running in salt lake |
| WO2023040534A1 (en) * | 2021-09-17 | 2023-03-23 | 西安蓝晓科技新材料股份有限公司 | Method for lithium adsorption in carbonate- and/or sulfate-containing solution |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264067A (en) * | 2018-03-22 | 2018-07-10 | 何朋飞 | A kind of new process and equipment of salt lake bittern production lithium chloride |
| CN112758961A (en) * | 2021-01-07 | 2021-05-07 | 青海盐湖工业股份有限公司 | Lithium chloride production process and system |
| CN112758961B (en) * | 2021-01-07 | 2023-05-09 | 青海盐湖工业股份有限公司 | Lithium chloride production process and system thereof |
| WO2023040534A1 (en) * | 2021-09-17 | 2023-03-23 | 西安蓝晓科技新材料股份有限公司 | Method for lithium adsorption in carbonate- and/or sulfate-containing solution |
| CN115433839A (en) * | 2022-10-12 | 2022-12-06 | 广东邦普循环科技有限公司 | Lithium extraction device capable of automatically running in salt lake |
| CN115433839B (en) * | 2022-10-12 | 2023-11-03 | 广东邦普循环科技有限公司 | Lithium extraction device for self-running salt lake |
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