CN105925801B - Concentrate method of the high salinity containing mixture solution and its application in lithium leachate is handled - Google Patents
Concentrate method of the high salinity containing mixture solution and its application in lithium leachate is handled Download PDFInfo
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- CN105925801B CN105925801B CN201610444264.5A CN201610444264A CN105925801B CN 105925801 B CN105925801 B CN 105925801B CN 201610444264 A CN201610444264 A CN 201610444264A CN 105925801 B CN105925801 B CN 105925801B
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- mixture solution
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 84
- 239000000203 mixture Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 58
- 239000012141 concentrate Substances 0.000 title claims abstract description 21
- 239000000706 filtrate Substances 0.000 claims abstract description 63
- 238000001914 filtration Methods 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 14
- 229910003002 lithium salt Inorganic materials 0.000 claims description 22
- 159000000002 lithium salts Chemical class 0.000 claims description 22
- 150000003839 salts Chemical group 0.000 claims description 7
- 238000009295 crossflow filtration Methods 0.000 claims description 5
- 239000000047 product Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 12
- 238000001704 evaporation Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000012528 membrane Substances 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 7
- 229910052808 lithium carbonate Inorganic materials 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 238000001471 micro-filtration Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 241001131796 Botaurus stellaris Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052629 lepidolite Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions 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
- 239000012452 mother liquor Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- -1 uses spodumene Chemical compound 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
- B01D61/026—Reverse osmosis; Hyperfiltration comprising multiple reverse osmosis steps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/10—Obtaining alkali metals
- C22B26/12—Obtaining lithium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of method for concentrating high salinity containing mixture solution and its application in processing lithium leachate, high salinity refers to liquid of the weight/mass percentage composition not less than 0.1% of soluble-salt content >=60000mg/L therein and water-insoluble containing mixture solution, and this method step includes：A, high salinity is formed into the first filtrate containing mixture solution by filtering the first filter plant that particle diameter is 0.1 50 μm, the filter medium of high salinity solution through the first filter plant；B, the second filter plant by the first filtrate by interception rate >=99.5% to the material of molecular weight >=1000, the first filtrate form the second filtrate through the filter medium of the second filter plant；C, the second filtrate is separated to form concentrate and the 3rd filtrate by the 3rd filter plant to molecular weight for interception rate >=90% of 100 1000 materials, the second filtrate by the 3rd filter plant；The 3rd filter plant the output quantity of the 3rd filtrate can be maintained at not less than 8L/ (m2H) and the soluble-salt content in concentrate is made to reach more than 130000mg/L.
Description
Technical field
The present invention relates to liquid concentration technical field, and in particular to a kind of method for concentrating high salinity containing mixture solution and its
Handle the application in lithium leachate.
Background technology
Liquid concentration is that the unit operation of partial solvent is removed from solution, is the part of solute and the uniform mixed liquor of solution
Separation process.Traditional concentration of solution containing salinity typically uses evaporation concentration technique, and evaporation concentration technique is primarily present following
Problem, first, still causing the yield of subsequent product relatively low containing substantial amounts of solute in mother liquor after evaporative crystallization；Second, evaporation
Still there are a large amount of impurity to stop in original solution afterwards, cause product purity not high, inferior quality；Third, in evaporating concentration process easily
Cause the thermal decomposition of product, cause the yield of product further to reduce；Fourth, the whole evaporation process used time is longer, it is higher to consume energy,
So that production cost greatly increases.In order to solve technical problem existing for aforesaid liquid concentration, applicant is contemplated using embrane method
Separation concentration technique concentrates instead of traditional evaporation concentration technique to solution containing salinity.But applicant is had found by studying
Current membrane separating concentration technique can only be directed to containing the not high solution concentration of salinity in actual mechanical process effectively, for height
Salinity can not be concentrated effectively containing mixture solution, it is found by the applicant that saline solns are concentrated into by general membrane separating method for concentration
The salt content of soluble-salt is that 60000mg/L has reached the concentration limit, also can not be further dense even if operating pressure is improved
The higher solution of the salt content that contracts.However, concentration operation of the high salinity containing mixture solution is exactly often needed in industrial processes
The technological operation to be carried out, thus need badly a kind of can concentrate method of the high salinity containing mixture solution at present.
For example, related in lithium production above-mentioned to concentration of the high salinity containing mixture solution.Lithium is a kind of important
Strategic resources material, it is the indispensable important source material of modern high technology product.Lithium carbonate is the secondary lithium salts of production and metal
The basic material of lithium product, thus become the maximum lithium product of dosage in lithium industry, other lithium products are all carbonic acid on it
The downstream product of lithium.The production technology of lithium carbonate can be divided into salt lake bittern extraction according to the difference of raw material sources and ore carries
Take.At present, China then mainly uses solid mineral extraction process, and ore extraction lithium mainly uses spodumene, lepidolite etc. solid
Body lithium ore produces lithium carbonate and other lithium products.The with a long history of lithium resource is extracted from ore, technology is also more ripe, mainly
Production technology has lime sinter process and sulfuric acid process, and wherein sulfuric acid process is the most important method used at present.Current sulfuric acid process
Processing step is as follows：The fine grinding of lithium ore, roasting, acidleach, remove calcium and magnesium, be filtering, evaporation and concentration, sinker, separating, washing, dry
It is dry, wherein the concentration of the lithium leachate of gained generally uses evaporating and concentrating process after going calcium and magnesium.The applicant, which studies, to be found, on
It is that high salinity contain mixture solution to state in technique lithium leachate, when being operated according to above-mentioned processing step the filtering accuracy of filtering link compared with
Low, impurity content is higher in lithium leachate after filtering, causes subsequent product quality relatively low；Be concentrated by evaporation link duration,
Thickening efficiency is low, power consumption is high, and the cost for causing to produce lithium greatly increases.The applicant attempts to concentrate using traditional membrane separating
Found during technical substitution aforesaid operations, lithium leachate occurs the situation of concentration stagnation in concentration at the very start in aforesaid operations, i.e.,
Raising operating pressure is set also can not effectively to be concentrated.
The content of the invention
The technical problems to be solved by the invention are that providing a kind of high salinity of the excellent concentration of concentrated effect contains mixture solution
Method and its application in lithium leachate is handled.
In order to solve the above problems, the present invention is achieved through the following technical solutions：
The invention provides a kind of high method of the salinity containing mixture solution of concentration, the high salinity refers to therein containing mixture solution
The weight/mass percentage composition of soluble-salt content >=60000mg/L and water-insoluble is not less than 0.1% liquid, this method step bag
Include：
A, it is 0.1-50 μm of the first filter plant by filtering particle diameter containing mixture solution by the high salinity, wherein, it is described
High salinity forms the first filtrate after the filter medium of the first filter plant is passed through containing mixture solution；
B, the second filter plant by the first filtrate by interception rate >=99.5% to the material of molecular weight >=1000, its
In, first filtrate forms the second filtrate after passing through the filter medium of the second filter plant；
C, by the second filtrate by molecular weight for 100-1000 materials interception rate >=90% the 3rd filter plant, its
In, second filtrate forms concentrate after being stopped by the filter medium of the 3rd filter plant, through the mistake of the 3rd filter plant
The 3rd filtrate is formed after filter medium；
The output quantity of 3rd filtrate can be maintained at not less than 8L/ (m by the 3rd described filter plant2H) and make described
Soluble-salt content in concentrate reaches more than 130000mg/L.
High salinity removes particle diameter more than 0.1- first under the filtering of the first filter plant containing mixture solution according to particle diameter screening
The solid matter of 50 μm of larger particles, such as the deposit of some calcium-magnesium-containings, increase before the filtering of the first filter plant
Coarse filtration operating unit, the large-sized solid particulate matter in saliferous liquid separation body is filtered out, avoid the larger solid particulate matter of these volumes
Filter medium in the first filter plant of verifying causes mechanical damage.Also contain from the first filtrate of the first filter plant filtering gained
There are some some impurity that can not be removed by the screening of above-mentioned particle diameter, such as some colloidal substances, pass through the second filter plant
Molecular weight screening removes the material of molecular weight >=1000 to obtain the higher solution of purity.Pass through the mistake of above-mentioned double-filtration equipment
Filter, is realized to deep purifying of the high salinity containing mixture solution to meet to want high salinity containing mixture solution during subsequent concentration
Ask.It can be realized under the operation condition of the 3rd filter plant from the second filtrate of the second filter plant outflow and be by salt content
60000mg/L is concentrated into 130000mg/L and can also further concentrated, and the high salinity in the concentrate for obstruction contains mixture solution,
It is not in the situation that concentration is stagnated in concentration process.The present invention mainly has some following benefit, first, can solve the problem that industrial
The technical problem that high salinity can not be concentrated effectively containing mixture solution, it is not easy the situation that concentration is stagnated occur in concentration process；Two
It is the combination operation of above-mentioned two-stage secondary filter and concentration so that final products purity is very high, product quality and concentration
Effect is all very good；Third, facts have proved under above-mentioned each Parameter Conditions, can be produced in the case where being operated compared with low energy consumption compared with Gao Pin
The product of matter, production efficiency is higher, and economic benefit is best.
As further improvements in methods of the high salinity of above-mentioned concentration containing mixture solution, the 3rd filter plant is included at least
Two filters being sequentially connected, each filter for interception rate >=90% of 100-1000 materials and are kept to molecular weight
The output quantity of 3rd filtrate is not less than 8L/ (m2·h).Under these conditions, two filters stop shape by filter medium
Into concentrate soluble-salt content it is substantially incremented by successively, and keep the 3rd filtrate output quantity, thereby guarantee that concentration effect
Fruit.The renewal of filtration flux can effectively be realized by increasing the filter quantity of the 3rd filter plant, be more favorable for the second filtrate
Concentration, realize and multistage containing mixture solution of high salinity concentrated, multistage concentration here can use multiple combinations mode, can be with
It is open, semi open model.Using it is open when, in the 3rd filter plant the concentration of last filter stop formed it is dense
Contracting liquid is flowed directly out, and during using semi open model, the concentrate formed is stopped in the 3rd filter plant last filter concentration
The concentrate for returning to the outflow of its inlet and a upper filter converges and is again introduced into last filter, thus improves solution
Thickening efficiency.
Further, the 3rd filter plant is made up of two filters being sequentially connected, two filter resistances
The soluble-salt content of the concentrate formed after cutting is followed successively by 130000mg/L, 180000mg/L.On this condition, after removal of impurities
High salinity concentrated effect containing mixture solution is best, products obtained therefrom performance optimal.
As further improvements in methods of the high salinity of above-mentioned concentration containing mixture solution, the filtering of the 3rd filter plant is situated between
Matter is made up of DTRO films.The DTRO films are disc tube reverse osmosis (dt-ro) film, are suitable for the liquid of processing filtering high concentration, are more favorable for
Keep the concentrated, stable of the 3rd filter plant.
As further improvements in methods of the high salinity of above-mentioned concentration containing mixture solution, first filter plant and the second mistake
Filter equipment uses end-filtration mode or cross-flow filtration mode.It should be noted that cross-flow filtration mode refers in power set
Under effect high salinity containing mixture solution parallel to film surface flow, high salinity containing mixture solution flow through shearing force caused by film surface can
The particle that film surface is detained is taken away, ensures the filtration flux of filter plant, the high salinity for not passing through filter medium is past containing mixture solution
Toward needing to be back in filter, high salinity salt content containing mixture solution is thus kept；End-filtration mode refers to the miscellaneous of obstruction
Matter particle packing only need to overcome membrane resistance on film surface, and its power consumption is small, but work continuity and filter efficiency are less than cross-flow
Filtering, in addition to both of these case, can also combine both utilization.
It is described present invention also offers a kind of application for concentrating high method of the salinity containing mixture solution in lithium leachate is handled
The weight/mass percentage composition of soluble lithium salt content >=60000mg/L and water-insoluble in lithium leachate be not less than 0.1%, including
Following steps：
A, by the lithium leachate by filtering the first filter plant that particle diameter is 0.1-50 μm, wherein, the lithium leaches
Liquid forms the first filtrate after passing through the filter medium of the first filter plant；
B, the second filter plant by the first filtrate by interception rate >=99.5% to the material of molecular weight >=1000, its
In, first filtrate forms the second filtrate after passing through the filter medium of the second filter plant；
C, by the second filtrate by molecular weight for 100-1000 materials interception rate >=90% the 3rd filter plant, its
In, second filtrate forms concentration lithium leachate after being stopped by the filter medium of the 3rd filter plant, set through the 3rd filtering
The 3rd filtrate is formed after standby filter medium；
The output quantity of 3rd filtrate can be maintained at not less than 8L/ (m by the 3rd described filter plant2H) and make described
Soluble lithium salt content in concentration lithium leachate reaches more than 130000mg/L.
It was verified that the reason lithium leachate in lithium industrial production is handled by the above method, gained concentration lithium leachate
Purity is high, production efficiency is high, lithium leachate just can be concentrated into preferable lithium salt content, and subsequent technique is soaked using the concentration lithium
It is best in quality to go out the lithium carbonate product of liquid production, can be directly used for market sale.
As the further improvement of application of method of the high salinity of above-mentioned concentration containing mixture solution in lithium leachate is handled, institute
Stating the 3rd filter plant includes at least two filters being sequentially connected, and each filter is 100-1000 materials to molecular weight
Interception rate >=90% and keep the 3rd filtrate output quantity be not less than 8L/ (m2·h)。
As the further improvement of application of method of the high salinity of above-mentioned concentration containing mixture solution in lithium leachate is handled, institute
State the 3rd filter plant to be made up of two filters being sequentially connected, the concentration lithium that two filters are formed after stopping leaches
The soluble lithium salt content of liquid is followed successively by 130000mg/L, 180000mg/L.On this condition, the lithium leachate concentration after removal of impurities
Effect is best, products obtained therefrom performance optimal.
As the further improvement of application of method of the high salinity of above-mentioned concentration containing mixture solution in lithium leachate is handled, institute
The filter medium for stating the 3rd filter plant is made up of DTRO films.The DTRO films are disc tube reverse osmosis (dt-ro) film, are suitable for treating
Highly-saline lithium leachate is filtered, is more favorable for keeping the concentrated, stable of the 3rd filter plant.
As the further improvement of application of method of the high salinity of above-mentioned concentration containing mixture solution in lithium leachate is handled, lithium
The filtration temperature of leachate is remained between 5 DEG C -40 DEG C.Under the temperature conditionss, be more suitable for lithium leachate filtering,
Concentration.
Below by way of accompanying drawing and embodiment, the invention will be further described.
Brief description of the drawings
Fig. 1 is the equipment flowsheet schematic diagram of embodiment one in the present invention.
Fig. 2 is the equipment flowsheet schematic diagram of embodiment two in the present invention.
Fig. 3 is the equipment flowsheet schematic diagram of embodiment three in the present invention.
Embodiment
High method of the salinity containing mixture solution and its application in lithium leachate is handled are concentrated to this below by way of the present invention
Invention is described further, and the lithium leachate is that lithium sulfate removes the leachate after magnesium calcium precipitate in lithium carbonate production process,
The weight/mass percentage composition of soluble lithium salt content >=60000mg/L and water-insoluble in the lithium leachate are not less than 0.1%.
As shown in figure 1, the embodiment of the present invention one provides a kind of high method of the salinity containing mixture solution of concentration in processing lithium leaching
The application gone out in liquid, comprises the following steps：
A, in the presence of power set pump 110, lithium leachate first passes around plate-frame filtering device and carries out coarse filtration, filters out
Bulky grain solid impurity in lithium leachate, by lithium leachate by filtering the first filter plant 1 that particle diameter is 0.1-50 μm, the
The filter medium that one filter plant 1 uses intercepts material of the particle diameter more than 0.1-50 μm for microfiltration membranes；
B, the first filtrate formed afterwards through the first filter plant 1 flow to the interception rate of the material of molecular weight >=1000 >=
99.5% the second filter plant 2, the second filter plant 2 also pass through second using microfiltration membranes as filter medium, the first filtrate
The filter medium of filter plant forms the impurity such as the second filtrate, the colloidal substance of the first filtrate middle-molecular-weihydroxyethyl >=1000 and is situated between by filtering
Matter is intercepted and filtered out；
C, by the second filtrate by molecular weight for 100-1000 materials interception rate >=90% the 3rd filter plant, its
In, second filtrate forms concentration lithium leachate after being stopped by the filter medium of the 3rd filter plant, set through the 3rd filtering
The 3rd filtrate is formed after standby filter medium；
The output quantity of 3rd filtrate can be maintained at not less than 8L/ (m by the 3rd described filter plant2H) and make described
Soluble lithium salt content in concentration lithium leachate reaches more than 130000mg/L.The filter medium of 3rd filter plant by
DTRO films are formed.Whole process temperature control equipment is controlled in the first filter plant 1, the second filter plant 2, the 3rd filter plant
The filtration temperature of lithium leachate remains at 40 DEG C in 3.First filter plant 1 and the second filter plant 2 use end-filtration
Mode or cross-flow filtration mode.3rd filter plant 3 can be single filter, and each filter is to molecular weight
Interception rate >=90% of 100-1000 materials and the output quantity of the 3rd filtrate is kept to be not less than 8L/ (m2·h).3rd filtering is set
The concentration lithium leachate is collected after the lithium salts leachate lithium salt content to be concentrated to target in standby 3, the concentration lithium being collected into leaches
Liquid, which can be preserved temporarily, is used for subsequent production in the next link sinker equipment for can also flow directly into lithium production technology.
Concentration is carried out to lithium leachate by the above method, concentrated effect is excellent, can realize that high lithium salts divides solution
Concentration, the lithium leachate purity of gained is high after concentration, also very high for the lithium carbonate product quality obtained by subsequent production,
Processing procedure can be compared with running under low energy consumption, and production cost is low, good in economic efficiency.
You need to add is that can periodically turn off the 3rd filtrate liquid outlet of the 3rd filter plant 3 in concentration process
3rd valve 410, then inputs clear water into the 3rd filter plant 3, and clear water enters the 3rd filtering with 1.5-3m/s flow velocity and set
It is standby, it can preferably clear water flow velocity be 2.5-3m/s, continuously be passed through 24-64h, thus, it is possible to play periodic cleaning filter plant, protect
Demonstrate,prove the effect of filter plant filtration flux.
Such as Fig. 1, the present embodiment one additionally provides a kind of equipment for concentrating lithium leachate, including the filtering particle diameter being sequentially connected
For 0.1-50 μm of the first filter plant 1, the second filter plant 2 of interception rate >=99.5% of the material of molecular weight >=1000, point
Son amount is the 3rd filter plant 3 of interception rate >=90% of 100-1000 materials, and the filtering of the first filter plant 1, second is set
Standby 2 be cross-flow filtration device and/or end-filtration device, the first filter plant 1, the second filter plant 2 filter medium by
Microfiltration membranes are formed, and the filter medium of the filter medium of the 3rd filter plant 3 is made up of DTRO films.These filters are sequentially
It is connected and the liquid salt content of each filter outflow is incremented by successively, in addition to high salinity edge containing mixture solution is filtered step by step
The pump 110 of equipment flowing and the salometry device for determining each high salinity salt content containing mixture solution of link.3rd filtering
3rd filtrate (liquid of equipment 3 is connected with pans 4, and the pans 4 are the second collection device, the 3rd filter plant 3
3rd filtrate liquid outlet is provided with the 3rd valve 410.Also include the temperature control dress for controlling each high salinity temperature containing mixture solution of link
Put.The inlet of first filter plant 1 is connected with plate and frame filter.Filtration flux >=8L/ of 3rd filter plant 3
(m2·h).The filter medium of first filter plant 1 is made up of microfiltration membranes.The concentration lithium of 3rd filter plant 3 leaches
Liquid liquid outlet is connected with the first collection device, and first collection device is dense to concentrate lithium leachate storage device or sinker device
Contracting lithium leachate can be stored temporarily, can also be flowed directly into follow-up sinker device and be carried out sinker operation.
Embodiment two
As shown in Fig. 2 the present embodiment concentrates application and reality of high method of the salinity containing mixture solution in lithium leachate is handled
The difference for applying example one is, in the present embodiment the 3rd filter plant 3 include two first level filtering devices 31 being sequentially connected with,
Two-stage filter 32, both the 3rd filtrate liquid outlets converge to be connected with pans 4, what two filters were formed after stopping
The soluble lithium salt content of concentration lithium leachate is followed successively by 130000mg/L, 180000mg/L.Lithium is concentrated in the present embodiment to leach
The equipment of liquid is Open architecture, i.e., the lithium salt content that two-stage filter 32 is isolated from the 3rd filter plant 3 is
180000mg/L concentration lithium leachates flow directly out and are collected for use as subsequent technique.
Embodiment three
As shown in figure 3, the present embodiment concentrates application and reality of high method of the salinity containing mixture solution in lithium leachate is handled
The difference for applying example one is,
The equipment for concentrating lithium leachate in the present embodiment in the present embodiment is semi-open type structure, i.e., from the 3rd filter plant 3
The inlet that the lithium salts leachate that middle two-stage filter 22 is isolated returns to first level filtering device 21 concentrates again, lithium salt content
Flowed out after reaching 180000mg/L.3rd filter plant 2 includes the first level filtering device 31 and two-stage filter being sequentially connected
32, two-stage filter 32 is provided with the outlet of concentration lithium salts leachate and concentration lithium salts leachate refluxing opening, and concentration lithium salts leaches
Liquid refluxing opening is provided with the first valve 310 and connected with the inlet of first level filtering device 31, concentrates lithium salts leachate liquid outlet
It is provided with the second valve 320.3rd filtrate liquid outlet of first level filtering device 31 and two-stage filter 32 converge and with centre
Tank 4 is connected.The soluble lithium salt content for the concentration lithium leachate that two filters are formed after stopping be followed successively by 130000mg/L,
180000mg/L.Concrete operations close the second valve 320, the lithium salts of lithium leachate to be concentrated contains first to open the first valve 310
Amount closes the first valve 310 after reaching 180000mg/L, opens the second valve 320 so that concentration lithium leachate is discharged and received
Collection, the 3rd filtrate enter pans 4.On this condition, the present embodiment compared to embodiment one, the lithium leachate of embodiment two it is dense
Contracting effect is more preferable, and concentration process is more stable, for the lithium carbonate product quality obtained by subsequent production also highest.
Claims (10)
1. high method of the salinity containing mixture solution of concentration, the high salinity containing mixture solution refer to soluble-salt content therein >=
The weight/mass percentage composition of 60000mg/L and water-insoluble is not less than 0.1% liquid, it is characterised in that this method step includes：
A, it is 0.1-50 μm of the first filter plant (1) by filtering particle diameter containing mixture solution by the high salinity, wherein, the height
Salinity forms the first filtrate after the filter medium of the first filter plant (1) is passed through containing mixture solution；
B, the second filter plant (2) by the first filtrate by interception rate >=99.5% to the material of molecular weight >=1000, wherein,
First filtrate forms the second filtrate after passing through the filter medium of the second filter plant (1)；
C, by the second filtrate by molecular weight for 100-1000 materials interception rate >=90% the 3rd filter plant (3), its
In, second filtrate forms concentrate after being stopped by the filter medium of the 3rd filter plant (3), through the 3rd filter plant
(3) the 3rd filtrate is formed after filter medium；
The output quantity of 3rd filtrate can be maintained at not less than 8L/ (m by the 3rd described filter plant (3)2H) and make described dense
Soluble-salt content in contracting liquid reaches more than 130000mg/L.
2. method of the high salinity containing mixture solution is concentrated as claimed in claim 1, it is characterised in that the 3rd filter plant
(3) include at least two filters being sequentially connected, each filter to molecular weight for 100-1000 materials interception rate >=
90% and keep the 3rd filtrate output quantity be not less than 8L/ (m2·h)。
3. method of the high salinity containing mixture solution is concentrated as claimed in claim 2, it is characterised in that the 3rd filter plant
(3) it is made up of two filters being sequentially connected, the soluble-salt content for the concentrate that two filters are formed after stopping
It is followed successively by 130000mg/L, 180000mg/L.
4. method of the high salinity containing mixture solution is concentrated as claimed in claim 1, it is characterised in that the 3rd filter plant
(3) filter medium is made up of DTRO films.
5. method of the high salinity containing mixture solution is concentrated as claimed in claim 1, it is characterised in that first filter plant
(1) and the second filter plant (2) uses end-filtration mode or cross-flow filtration mode.
6. application of high method of the salinity containing mixture solution in lithium leachate is handled is concentrated, the soluble lithium in the lithium leachate
The weight/mass percentage composition of salt content >=60000mg/L and water-insoluble is not less than 0.1%, it is characterised in that characterized in that, bag
Include following steps：
A, by the lithium leachate by filtering the first filter plant (1) that particle diameter is 0.1-50 μm, wherein, the lithium leachate
The first filtrate is formed after through the filter medium of the first filter plant (1)；
B, the second filter plant (2) by the first filtrate by interception rate >=99.5% to the material of molecular weight >=1000, wherein,
First filtrate forms the second filtrate after passing through the filter medium of the second filter plant (1)；
C, by the second filtrate by molecular weight for 100-1000 materials interception rate >=90% the 3rd filter plant (3), its
In, second filtrate forms concentration lithium leachate after being stopped by the filter medium of the 3rd filter plant (3), through the 3rd filtering
The 3rd filtrate is formed after the filter medium of equipment (3)；
The output quantity of 3rd filtrate can be maintained at not less than 8L/ (m by the 3rd described filter plant (3)2H) and make described dense
Soluble lithium salt content in contracting lithium leachate reaches more than 130000mg/L.
7. application of method of the high salinity containing mixture solution in lithium leachate is handled, its feature are concentrated as claimed in claim 6
It is, the 3rd filter plant (3) includes at least two filters being sequentially connected, and each filter is to molecular weight
Interception rate >=90% of 100-1000 materials and the output quantity of the 3rd filtrate is kept to be not less than 8L/ (m2·h)。
8. application of method of the high salinity containing mixture solution in lithium leachate is handled, its feature are concentrated as claimed in claim 7
It is, the 3rd filter plant (3) is made up of two filters being sequentially connected, what two filters were formed after stopping
The soluble lithium salt content of concentration lithium leachate is followed successively by 130000mg/L, 180000mg/L.
9. application of method of the high salinity containing mixture solution in lithium leachate is handled, its feature are concentrated as claimed in claim 6
It is, the filter medium of the 3rd filter plant (3) is made up of DTRO films.
10. application of method of the high salinity containing mixture solution in lithium leachate is handled, its feature are concentrated as claimed in claim 6
It is, the filtration temperature of lithium leachate is remained between 5 DEG C -40 DEG C.
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| CN103319042A (en) * | 2013-07-16 | 2013-09-25 | 北京倍杰特国际环境技术有限公司 | High-salt complex wastewater reuse and zero discharge integrated equipment and technology |
| CN104591432A (en) * | 2014-12-31 | 2015-05-06 | 浙江博世华环保科技有限公司 | Processing method of landfill leachate film concentrated solution |
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| CN105152443A (en) * | 2015-09-22 | 2015-12-16 | 江苏中圣高科技产业有限公司 | Method and system for recycling crystallized salt resources in high-salt-content wastewater zero discharge |
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| CN103319042A (en) * | 2013-07-16 | 2013-09-25 | 北京倍杰特国际环境技术有限公司 | High-salt complex wastewater reuse and zero discharge integrated equipment and technology |
| CN104591432A (en) * | 2014-12-31 | 2015-05-06 | 浙江博世华环保科技有限公司 | Processing method of landfill leachate film concentrated solution |
| CN104787929A (en) * | 2015-04-22 | 2015-07-22 | 光大环保技术研究院（深圳）有限公司 | Treatment method and device of landfill leachate concentrate |
| CN105152443A (en) * | 2015-09-22 | 2015-12-16 | 江苏中圣高科技产业有限公司 | Method and system for recycling crystallized salt resources in high-salt-content wastewater zero discharge |
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