CN113663412A - Method for improving filtering performance of purifying liquid in preparation of ultrapure manganese sulfate - Google Patents
Method for improving filtering performance of purifying liquid in preparation of ultrapure manganese sulfate Download PDFInfo
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- CN113663412A CN113663412A CN202110790282.XA CN202110790282A CN113663412A CN 113663412 A CN113663412 A CN 113663412A CN 202110790282 A CN202110790282 A CN 202110790282A CN 113663412 A CN113663412 A CN 113663412A
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- 238000001914 filtration Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000007788 liquid Substances 0.000 title claims abstract description 36
- 229940099596 manganese sulfate Drugs 0.000 title claims abstract description 36
- 235000007079 manganese sulphate Nutrition 0.000 title claims abstract description 36
- 239000011702 manganese sulphate Substances 0.000 title claims abstract description 36
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000706 filtrate Substances 0.000 claims abstract description 21
- 238000005086 pumping Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000032683 aging Effects 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 13
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 239000011572 manganese Substances 0.000 claims abstract description 12
- 238000000746 purification Methods 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims abstract description 7
- 238000011049 filling Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 239000008399 tap water Substances 0.000 claims description 2
- 235000020679 tap water Nutrition 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000002244 precipitate Substances 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 2
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- MOVRNJGDXREIBM-UHFFFAOYSA-N aid-1 Chemical compound O=C1NC(=O)C(C)=CN1C1OC(COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C(NC(=O)C(C)=C2)=O)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C(NC(=O)C(C)=C2)=O)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C(NC(=O)C(C)=C2)=O)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)COP(O)(=O)OC2C(OC(C2)N2C3=C(C(NC(N)=N3)=O)N=C2)CO)C(O)C1 MOVRNJGDXREIBM-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012025 fluorinating agent Substances 0.000 description 1
- -1 fluorine ions Chemical class 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/10—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention relates to the technical field of preparation of ultrapure manganese sulfate, and discloses a method for improving the filtration performance of a purification solution in preparation of ultrapure manganese sulfate, which comprises the following steps: 1) preparing and filling filter aid slurry, respectively adding pure water and filter aid into a dispensing barrel, stirring, pumping the prepared filter aid slurry into a filter press, returning the filtrate into a dispensing tank, and circulating until the effluent is clear; 2) preparing a purifying liquid, namely preparing the aged purifying liquid with the temperature of 50-70 ℃, the manganese concentration of 80-120g/L in the former step according to the technical requirements. According to the method for improving the filtering performance of the purified liquid in the preparation of the ultrapure manganese sulfate, the filter aid is formed on the surface of the filter cloth in advance, and can be used for cooperating with fine-grained suspended matters in the purified liquid, so that the viscosity and granularity of precipitates are improved, the aging time is reduced, the filtering speed is accelerated, the using amount of the filter cloth is reduced, the production cost is saved, the filtering quality is improved, the quality of a manganese sulfate solution is improved, and the production benefit is increased.
Description
Technical Field
The invention relates to the technical field of improvement of a wet-process manganese sulfate production process, in particular to a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate.
Background
The process for producing manganese sulfate by a wet method comprises the following steps: firstly, leaching manganese ions in manganese ore powder by using sulfuric acid through a high-temperature high-acid process, and then neutralizing with lime to remove impurities such as iron, aluminum and the like; after the solid-liquid separation of the obtained leachate, impurities such as calcium, magnesium, heavy metals and the like are removed by a one-step method by sequentially adopting a fluorinating agent and a vulcanizing agent; then filtering the solution, and reducing the content of fluorine ions in the purified solution by using the high-efficiency fluorine removal agent; and then filtering the solution, and feeding the obtained qualified solution into a high-efficiency energy-saving MVR system for evaporation and crystallization to obtain a high-quality ultra-pure manganese sulfate product.
In the process of producing the ultrapure manganese sulfate by the wet method, the filtration is a common procedure, the filtration is needed during the leaching and the purification, the filtration performance directly influences the production cost, the production period, the product quality and the slag treatment cost of the manganese sulfate, in the process of producing the ultrapure manganese sulfate by a wet method, calcium and magnesium in the leachate need to be removed by adding fluoride, and colloidal precipitates of calcium fluoride and magnesium fluoride with extremely high viscosity are formed in the process, so that the solution is extremely difficult to filter, and nanometer calcium fluoride and magnesium fluoride colloidal particles are easily formed to be suspended in the solution and are extremely difficult to separate from the solution, the engineering deficiency troubles the hydrometallurgy industry for a long time, and can not be solved all the time, so that the production efficiency is low, the production period is long, and the cost is high, therefore, the method for improving the filtering performance of the purification liquid in the preparation of the ultrapure manganese sulfate is provided to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for improving the filtering performance of a purification solution in the preparation of ultrapure manganese sulfate, which has the advantages of improving the quality of the manganese sulfate solution, increasing the production benefit and the like, and solves the problems of low production efficiency, long production period and high cost in the prior art.
(II) technical scheme
In order to achieve the purposes of improving the quality of the manganese sulfate solution and increasing the production benefit, the invention provides the following technical scheme: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps:
1) preparing and filling filter aid slurry, respectively adding pure water and filter aid into a dispensing barrel, stirring, pumping the prepared filter aid slurry into a filter press, returning the filtrate into a dispensing tank, and circulating until the effluent is clear;
2) preparing a purifying solution, namely preparing an aged purifying solution with the temperature of 50-70 ℃, the manganese concentration of 80-120g/L in the former step according to the technical requirements;
3) pumping the purified liquid obtained in the second step into a filter press for filtering, and feeding the qualified filtrate into the next process;
4) when the filtration speed is lower than 0.09m3When the square meter is square meter h, the slag is removed, and the first step, the second step and the third step are repeated, and the production is carried out in such a circulating way.
Furthermore, the filter aid is one or more of diatomite, bentonite, activated carbon and carbon-based inorganic salt, and the pure water is tap water with the impurity content reaching the standard.
Further, the filling means that slurry is filled into a filter plate frame cavity, a compact filter membrane (filter aid layer) is formed on the surface of the filter cloth, and the thickness of the filter layer is 2-10 mm.
Further, the proportion of the pure water and the filter aid in the step one is 1:10-1:20, and the stirring time in the step one is 30-60 minutes.
Further, the aging time of the purification liquid in the first step is 2-6 hours.
Further, the step four is to discharge the invalid filter aid and the particles in the purified liquid out of the filter press, wherein the invalid filter aid and the particles in the purified liquid are obviously reduced in filtration speed, and the obvious reduction in filtration speed is lower than 0.09m3/(㎡·h)。
(III) advantageous effects
Compared with the prior art, the invention provides a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate, which has the following beneficial effects:
according to the method for improving the filtering performance of the purified liquid in the preparation of the ultrapure manganese sulfate, the filter aid is formed on the surface of the filter cloth in advance, and can be used for cooperating with fine-grained suspended matters in the purified liquid, so that the viscosity and granularity of precipitates are improved, the aging time is reduced, the filtering speed is accelerated, the using amount of the filter cloth is reduced, the production cost is saved, the filtering quality is improved, the quality of a manganese sulfate solution is improved, and the production benefit is increased.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding filter aid 1 and pure water according to a solid-liquid ratio of 1:10 respectively, stirring for 30 minutes, pumping into a filter press, returning filtrate to a dispensing tank, cleaning the filtrate, and stopping pumping, wherein the thickness of a filter layer is 4.6 mm; the purified liquid prepared in the former step at the temperature of 60 ℃, the manganese concentration of 93.65g/L and the aging time of 3 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter, h) and the filtration capacity reaches 300m3When the attenuation is 0.10m3/(㎡·h)。
Example two: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding a filter aid 2 and pure water according to a solid-liquid ratio of 1:10 respectively, stirring for 30 minutes, pumping into a filter press, returning the filtrate to a dispensing tank, and stopping pumping after the filtrate is clear, wherein the thickness of a filter layer is 4.6 mm; the purified liquid prepared in the former step at the temperature of 60 ℃, the manganese concentration of 93.65g/L and the aging time of 3 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter. h), the filtration capacity reaches 1000m3When the attenuation is 0.10m3/(㎡·h)。
Example three: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding a filter aid 2 and pure water according to a solid-liquid ratio of 1:10 respectively, stirring for 30 minutes, pumping into a filter press, returning the filtrate to a dispensing tank, and stopping pumping after the filtrate is clear, wherein the thickness of a filter layer is 4.6 mm; the purified liquid prepared in the former step at the temperature of 60 ℃, the manganese concentration of 119.26g/L and the aging time of 3 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter. h), the filtration capacity reaches 1000m3When the attenuation is 0.10m3/(㎡·h)。
Example four: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding a filter aid 2 and pure water according to a solid-liquid ratio of 1:15 respectively, stirring for 30 minutes, pumping into a filter press, returning the filtrate to a dispensing tank, and stopping pumping after the filtrate is clear, wherein the thickness of a filter layer is 6.8 mm; the purified liquid prepared in the former step at the temperature of 60 ℃, the manganese concentration of 93.65g/L and the aging time of 3 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter, h) and the filtration capacity reaches 600m3When the attenuation is 0.10m3/(㎡·h)。
Example five: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding a filter aid 2 and pure water according to a solid-liquid ratio of 1:15 respectively, stirring for 30 minutes, pumping into a filter press, returning the filtrate to a dispensing tank, and stopping pumping after the filtrate is clear, wherein the thickness of a filter layer is 4.6 mm; the purified liquid prepared in the former step at the temperature of 60 ℃, the manganese concentration of 93.65g/L and the aging time of 6 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter, h) and the filtering capacity reaches 900m3When the attenuation is 0.10m3/(㎡·h)。
Example six: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding a filter aid 2 and pure water according to a solid-liquid ratio of 1:15 respectively, stirring for 30 minutes, pumping into a filter press, returning the filtrate to a dispensing tank, and stopping pumping after the filtrate is clear, wherein the thickness of a filter layer is 4.6 mm; the purified liquid prepared in the former step at the temperature of 50 ℃, the manganese concentration of 93.65g/L and the aging time of 3 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter, h) and the filtration capacity reaches 750m3When the attenuation is 0.10m3/(㎡·h)。
Example seven: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding filter aid 2 and pure water according to a solid-liquid ratio of 1:15 respectively, stirring for 30 minutes, pumping into a filter press, returning the filtrate to a dispensing tank, cleaning the filtrate, and stopping pumping, wherein the thickness of a filter layer is 2.7 mm; the purified liquid prepared in the former step at the temperature of 50 ℃, the manganese concentration of 93.65g/L and the aging time of 3 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter. h), the filtration capacity reaches 660m3When the attenuation is 0.10m3/(㎡·h)。
Example eight: a method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate comprises the following steps: adding filter aid 3 and pure water according to a solid-liquid ratio of 1:15 respectively, stirring for 30 minutes, pumping into a filter press, returning the filtrate to a dispensing tank, cleaning the filtrate, and stopping pumping, wherein the thickness of a filter layer is 4.6 mm; front end toolThe purified liquid which is prepared in sequence and has the temperature of 60 ℃, the manganese concentration of 93.65g/L and the aging time of 3 hours is transferred into a transfer tank for filter pressing. The initial flow rate was 0.25m3(square meter, h) and the filtering quantity reaches 570m3When the attenuation is 0.10m3/(㎡·h)。
In summary, the following steps: the method for improving the filtering performance of the purified liquid in the preparation of the ultrapure manganese sulfate comprises the following steps: the method can obviously improve the viscosity and granularity of the precipitate, reduce the aging time, accelerate the filtration speed and improve the filtration quality, thereby reducing the usage amount of the filter cloth, saving the production cost, reducing the production period and increasing the production benefit.
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 (6)
1. A method for improving the filtering performance of a purifying solution in the preparation of ultrapure manganese sulfate is characterized by comprising the following steps:
1) preparing and filling filter aid slurry, respectively adding pure water and filter aid into a dispensing barrel, stirring, pumping the prepared filter aid slurry into a filter press, returning the filtrate into a dispensing tank, and circulating until the effluent is clear;
2) preparing a purifying solution, namely preparing an aged purifying solution with the temperature of 50-70 ℃, the manganese concentration of 80-120g/L in the former step according to the technical requirements;
3) pumping the purified liquid obtained in the second step into a filter press for filtering, and feeding the qualified filtrate into the next process;
4) when the filtration speed is lower than 0.09m3When the square meter is square meter h, the slag is removed, and the first step, the second step and the third step are repeated, and the production is carried out in such a circulating way.
2. The method for improving the filtering performance of the purification liquid in the preparation of the ultrapure manganese sulfate according to claim 1, wherein the filter aid is one or more of diatomite, bentonite, activated carbon and carbon-based inorganic salt, and the pure water is tap water with the impurity content reaching the standard.
3. The method for improving the filtering performance of the purification solution in the preparation of the ultrapure manganese sulfate according to claim 1, wherein the filling in the first step is to fill the slurry into a filter plate frame cavity to form a dense filter membrane (filter aid layer) on the surface of the filter cloth, and the thickness of the filter layer is 2-10 mm.
4. The method for improving the filtering performance of the purified liquid in the preparation of the ultrapure manganese sulfate according to claim 1, wherein the ratio of the pure water to the filter aid in the first step is 1:10-1:20, and the stirring time in the first step is 30-60 minutes.
5. The method for improving the filtering performance of the purification solution in the preparation of the ultrapure manganese sulfate as claimed in claim 1, wherein the aging time of the purification solution in the first step is 2-6 hours.
6. The method for improving the filtering performance of the purified liquid in the preparation of the ultrapure manganese sulfate according to claim 1, wherein the slag discharge refers to discharging the filter aid with failure and particles in the purified liquid out of a filter press, wherein the failure refers to a remarkable reduction of the filtering speed, and the remarkable reduction refers to a filtering speed lower than 0.09m3/(㎡·h)。
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| Title |
|---|
| 简明自然科学词典编委会: "《简明自然科学词典》", 30 September 1988, 山东大学出版社 * |
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