CN114733269B - Method for cleaning titanium gypsum filter cloth - Google Patents
Method for cleaning titanium gypsum filter cloth Download PDFInfo
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- CN114733269B CN114733269B CN202210456247.9A CN202210456247A CN114733269B CN 114733269 B CN114733269 B CN 114733269B CN 202210456247 A CN202210456247 A CN 202210456247A CN 114733269 B CN114733269 B CN 114733269B
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- filter cloth
- titanium gypsum
- soluble
- fluoride
- soaking
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- 239000004744 fabric Substances 0.000 title claims abstract description 106
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 36
- 239000010440 gypsum Substances 0.000 title claims abstract description 36
- 239000010936 titanium Substances 0.000 title claims abstract description 36
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004140 cleaning Methods 0.000 title claims abstract description 18
- 238000002791 soaking Methods 0.000 claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 34
- 239000000243 solution Substances 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 28
- 150000004673 fluoride salts Chemical class 0.000 claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 238000005406 washing Methods 0.000 claims abstract description 16
- 239000012266 salt solution Substances 0.000 claims abstract description 15
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 13
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 13
- 159000000007 calcium salts Chemical class 0.000 claims abstract description 9
- -1 hexafluoro metal complex Chemical class 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 16
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 14
- 239000011775 sodium fluoride Substances 0.000 claims description 7
- 235000013024 sodium fluoride Nutrition 0.000 claims description 7
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 6
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000011698 potassium fluoride Substances 0.000 claims description 3
- 235000003270 potassium fluoride Nutrition 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- 230000004907 flux Effects 0.000 abstract description 7
- 229960004887 ferric hydroxide Drugs 0.000 abstract description 4
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 235000011132 calcium sulphate Nutrition 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/32—Removal of the filter cakes
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Filtering Materials (AREA)
Abstract
The application discloses a method for cleaning titanium gypsum filter cloth, which at least comprises the following steps: s1, removing titanium gypsum on the surface of titanium gypsum filter cloth, and soaking the filter cloth with acid liquor with the acidity of 1-4 mol/L to remove acid-soluble impurities; s2, soaking the filter cloth by adopting a soluble fluoride salt solution; s3, soaking the filter cloth by adopting an iron source solution and/or an aluminum source solution, and then washing to obtain the clean filter cloth. Compared with the prior art, the method has the advantages that acid liquor is firstly adopted to soak and remove acid-soluble impurities such as ferric hydroxide and the like remained in the filter cloth, then soluble fluoride salt is adopted to convert calcium sulfate in the filter cloth into calcium fluoride, then the calcium fluoride reacts with an iron source and/or an aluminum source to generate a water-soluble hexafluoro metal complex and a water-soluble calcium salt, and the water flux of the filter cloth is completely recovered through washing and separation of the filter cloth, so that the purpose of repeatedly using the filter cloth is realized.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide production, and particularly relates to a method for cleaning titanium gypsum filter cloth.
Background
In the production process of titanium dioxide by the sulfuric acid method, a large amount of acid wastewater with sulfuric acid as a main component is generated. At present, carbide sludge is often adopted to neutralize the acid wastewater in the treatment process. After the neutralization reaction, a large amount of titanium gypsum with calcium sulfate as the main component is produced. In the filter pressing process, as calcium sulfate crystals continuously grow, not only are filter cloth easy to block and harden, but also the filter cloth cannot be reused completely due to the problems of difficult cleaning and the like, so that the utilization rate of the filter cloth is reduced.
Disclosure of Invention
The invention aims to provide a method for cleaning titanium gypsum filter cloth to solve the defects in the prior art.
The invention aims at realizing the following technical scheme:
a method of cleaning titanium gypsum filter cloth, comprising at least the steps of:
s1, removing titanium gypsum on the surface of titanium gypsum filter cloth, and soaking the filter cloth with acid liquor with the acidity of 1-4 mol/L to remove acid-soluble impurities;
s2, soaking the filter cloth by adopting a soluble fluoride salt solution, and converting slightly soluble calcium sulfate in the filter cloth into insoluble calcium fluoride and water-soluble sulfate;
s3, soaking the filter cloth by adopting an iron source solution and/or an aluminum source solution, converting the insoluble calcium fluoride into a water-soluble hexafluoro metal complex and a water-soluble calcium salt, and then washing to remove the water-soluble hexafluoro metal complex and the water-soluble calcium salt to obtain the clean filter cloth.
Preferably, the acid liquor in the step S1 is recycled until the pH value is more than or equal to 1.
Preferably, the acid solution in step S1 is hydrochloric acid or nitric acid solution.
Preferably, the soaking time in the step S1 is 1.5-2.5 hours.
Preferably, the fluoride salt solution concentration in step S2 is > 50mg/L calculated as fluoride ion.
Preferably, the soaking time in the step S2 is more than or equal to 2 hours, and the temperature of the fluoride salt solution is less than or equal to 60 ℃.
Preferably, the fluoride salt is one or more selected from sodium fluoride and potassium fluoride.
Preferably, the iron source in step S3 is one or more combinations selected from ferric chloride and ferric nitrate, and the aluminum source is one or more combinations selected from aluminum chloride and aluminum nitrate.
Preferably, the filter cloth is soaked by adopting an aluminum source solution, the concentration of the aluminum source solution is more than or equal to 0.7mol/L, and the soaking time is 1.5-2.5 h.
Preferably, the filter cloth is soaked by adopting an iron source solution, the concentration of the iron source solution is more than or equal to 0.7mol/L, and the soaking time is 1.5-2.5 h.
Compared with the prior art, the method has the advantages that acid liquor is firstly adopted to soak and remove acid-soluble impurities such as ferric hydroxide and the like remained in the filter cloth, then soluble fluoride salt is adopted to convert calcium sulfate in the filter cloth into calcium fluoride, then the calcium fluoride reacts with an iron source and/or an aluminum source to generate a water-soluble hexafluoro metal complex and a water-soluble calcium salt, and the water flux of the filter cloth is completely recovered through washing and separation of the filter cloth, so that the purpose of repeatedly using the filter cloth is realized.
Detailed Description
A method of cleaning titanium gypsum filter cloth, comprising the steps of:
s1, removing titanium gypsum on the surface of titanium gypsum filter cloth, then placing the filter cloth in 1-4 mol/L acid liquor for soaking, wherein calcium sulfate is removed from the filter cloth, hydroxide such as ferric hydroxide generated in the neutralization process is also contained in the filter cloth, and the hydroxide is dissolved in acid through acid liquor soaking and can be removed from the calcium sulfate through washing;
s2, soaking the filter cloth by adopting a soluble fluoride salt solution, and converting the slightly soluble calcium sulfate crystals in the filter cloth into insoluble calcium fluoride and water-soluble sulfate; because the solubility of the calcium fluoride is low, the calcium sulfate in the filter cloth can be completely converted into the calcium fluoride; the fluoride salt is required to be fluoride salt which reacts with sulfate radical to generate soluble sulfate solution, such as sodium fluoride and potassium fluoride;
s3, soaking the filter cloth by adopting an iron source solution and/or an aluminum source solution, and reacting the insoluble calcium fluoride with the iron source or the aluminum source to convert into a water-soluble complex ([ FeF) 6 ] 3- Or [ AlF ] 6 ] 3- ) And a water-soluble calcium salt, and then removed from the filter cloth by washing to obtain a clean filter cloth which can be reused. The iron source or aluminum source is required to be used for generating soluble calcium salt solution by reacting with calcium ions, such as ferric chloride and aluminum chloride.
Therefore, the method firstly adopts acid liquor to soak and remove acid-soluble impurities such as ferric hydroxide and the like remained in the filter cloth, then adopts soluble fluoride salt to convert calcium sulfate in the filter cloth into calcium fluoride, then reacts with an iron source and/or an aluminum source to generate a water-soluble hexafluoro metal complex and a water-soluble calcium salt, and the water flux of the filter cloth is basically and completely recovered through washing and separation of the filter cloth, so that the purpose of repeatedly using the filter cloth is realized.
Preferably, the acid liquor in the step S1 is recycled until the pH value is more than or equal to 1 and the recycling is stopped when the acidity is weakened.
Preferably, the acid solution in step S1 can be nitric acid or hydrochloric acid solution.
Preferably, the soaking time in the step S1 is 1.5-2.5 hours, and in this range, acid-soluble impurities can be sufficiently removed.
Preferably, the concentration of the fluoride salt solution in the step S2 is more than 50mg/L in terms of fluoride ion, and saturated fluoride salt solution can be adopted when the fluoride salt solution is used for the first time, and when the concentration of the fluoride salt solution is reduced to be less than or equal to 50mg/L, the fluoride salt solution stops recycling, so that incomplete reaction with calcium sulfate due to lower fluoride salt content is prevented.
Preferably, the soaking time in the step S2 is not less than 2 hours, the fluoride salt solution can be heated to accelerate the reaction, and the heating temperature is less than or equal to 60 ℃.
Preferably, the iron source in the step S3 is one or more combinations selected from ferric chloride and ferric nitrate, and the aluminum source is one or more combinations selected from aluminum chloride and aluminum nitrate.
Preferably, the filter cloth is soaked by adopting an aluminum source solution, the concentration of the aluminum source solution is more than or equal to 0.7mol/l, and the soaking time is 1.5-2.5 h.
Preferably, the filter cloth is soaked by adopting an iron source solution, the concentration of the iron source solution is more than or equal to 0.7mol/l, and the soaking time is 1.5-2.5 h.
Example 1
1. After the titanium gypsum is removed from the plate, the surface of the filter cloth is washed by an external water pipe to remove the incompletely removed titanium gypsum, the filter cloth is removed, the flux of the filter cloth is about 20 percent of that of the fresh filter cloth, and the calcium sulfate content in the filter cloth is 2.3Kg/m 2 (on a calcium sulfate dihydrate dry basis);
2. soaking the filter cloth by using acid liquor (preferably, submerging the filter cloth), wherein the acid liquor is hydrochloric acid, the concentration of the hydrochloric acid is 2mol/L, the soaking time is 2 hours, and then washing by using clear water;
3. soaking the filter cloth by using a hot sodium fluoride solution, wherein the temperature of the solution is 45 ℃, the sodium fluoride content is 9.4g/L (calculated by fluoride ions), the soaking time is 2 hours, and washing by using clear water;
4. soaking the filter cloth by using aluminum chloride, wherein the concentration of the aluminum chloride solution is 0.92mol/l, and the soaking time is 2 hours;
5. then the filter cloth is washed by primary water, the flux of the filter cloth is about 80 percent of that of the fresh filter cloth, and the calcium sulfate content in the filter cloth is 0.45Kg/m 2 The filter cloth (based on the dry basis of calcium sulphate dihydrate) is reusable.
Example 2
1. After the titanium gypsum is removed from the plate, the surface of the filter cloth is washed by an external water pipe to remove the incompletely removed titanium gypsum, the filter cloth is removed, the flux of the filter cloth is about 38% of that of fresh filter cloth, and the content of crystalline calcium sulfate in the filter cloth is 1.51Kg/m 2 (on a calcium sulfate dihydrate dry basis);
2. soaking the filter cloth by using acid liquor (preferably, submerging the filter cloth), wherein the acid liquor is hydrochloric acid, the concentration of the hydrochloric acid is 1.3mol/L, the soaking time is 2 hours, and then washing by using clear water;
3. soaking the filter cloth by using a hot sodium fluoride solution, wherein the temperature of the solution is 36 ℃, the sodium fluoride content is 2.6g/L (calculated by fluoride ions), the soaking time is 2 hours, and washing by using clear water;
4. soaking the filter cloth by using aluminum chloride, wherein the concentration of the aluminum chloride is 1.35mol/l, and the soaking time is 2 hours;
5. the filter cloth was then washed with primary water, at which time the filter cloth flux was about 69% of the fresh filter cloth, and the crystalline calcium sulfate content of the filter cloth was 0.81Kg/m 2 The filter cloth (based on the dry basis of calcium sulphate dihydrate) is reusable.
Comparative example 1
1. After the titanium gypsum is unloaded, the surface of the filter cloth is washed by an external water pipe to remove the incompletely unloaded titanium gypsum;
2. soaking the filter cloth by using acid liquor, wherein the acid liquor is hydrochloric acid, the acidity is 3mol/L, the soaking time is 4 hours, and washing is performed by using clear water;
3. the filter cloth is still in a hardened state and cannot be used.
Comparative example 2
1. After the titanium gypsum is unloaded, the surface of the filter cloth is washed by an external water pipe to remove the incompletely unloaded titanium gypsum;
2. soaking the filter cloth by using sodium hydroxide solution, wherein the alkalinity of the sodium hydroxide solution is 2mol/L, the soaking time is 2h, and washing by using clear water;
3. the filter cloth is still not hardened and cannot be used.
Comparative example 3
1. After the titanium gypsum is unloaded, the surface of the filter cloth is washed by an external water pipe to remove the incompletely unloaded titanium gypsum;
2. soaking the filter cloth by using acid liquor, wherein the acid liquor is hydrochloric acid, the acidity is 3mol/L, the soaking time is 4 hours, and washing is performed by using clear water;
3. soaking the filter cloth by using sodium carbonate solution for 4 hours, and washing by using clear water;
4. the filter cloth is soaked by acid liquor, the acid liquor is hydrochloric acid, the acid is 3mol/L, the soaking time is 4 hours, and a large number of bubbles are generated due to the reaction, so that the determination of the reaction end point is difficult and cannot be conveniently determined.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A method of cleaning titanium gypsum filter cloth, comprising at least the steps of:
s1, removing titanium gypsum on the surface of titanium gypsum filter cloth, and soaking the filter cloth with acid liquor with the acidity of 1-4 mol/L to remove acid-soluble impurities;
s2, soaking the filter cloth by adopting a soluble fluoride salt solution, and converting slightly soluble calcium sulfate in the filter cloth into insoluble calcium fluoride and water-soluble sulfate;
s3, soaking the filter cloth by adopting an iron source solution and/or an aluminum source solution, converting the insoluble calcium fluoride into a water-soluble hexafluoro metal complex and a water-soluble calcium salt, and then washing to remove the water-soluble hexafluoro metal complex and the water-soluble calcium salt to obtain the clean filter cloth.
2. A method of cleaning titanium gypsum filter cloth according to claim 1,
and (3) recycling the acid liquor in the step (S1) until the pH value is more than or equal to 1.
3. A method of cleaning titanium gypsum filter cloth according to claim 1,
the acid liquid in the step S1 is hydrochloric acid or nitric acid solution.
4. A method of cleaning titanium gypsum filter cloth according to claim 1,
the soaking time in the step S1 is 1.5-2.5 h.
5. A method of cleaning titanium gypsum filter cloth according to claim 1,
the concentration of the fluoride salt solution in the step S2 is calculated by fluoride ion, and the concentration is more than 50mg/L.
6. A method of cleaning titanium gypsum filter cloth according to claim 1,
the soaking time in the step S2 is more than or equal to 2 hours, and the temperature of the fluoride salt solution is less than or equal to 60 ℃.
7. A method of cleaning titanium gypsum filter cloth according to claim 1,
the fluoride salt is one or more selected from sodium fluoride and potassium fluoride.
8. A method of cleaning titanium gypsum filter cloth according to claim 1,
the iron source in the step S3 is one or more combinations selected from ferric chloride and ferric nitrate, and the aluminum source is one or more combinations selected from aluminum chloride and aluminum nitrate.
9. A method of cleaning titanium gypsum filter cloth according to claim 8,
the filter cloth is soaked by adopting an aluminum source solution, the concentration of the aluminum source solution is more than or equal to 0.7mol/L, and the soaking time is 1.5-2.5 h.
10. A method of cleaning titanium gypsum filter cloth according to claim 8,
the filter cloth is soaked by adopting an iron source solution, the concentration of the iron source solution is more than or equal to 0.7mol/L, and the soaking time is 1.5-2.5 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210456247.9A CN114733269B (en) | 2022-04-28 | 2022-04-28 | Method for cleaning titanium gypsum filter cloth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210456247.9A CN114733269B (en) | 2022-04-28 | 2022-04-28 | Method for cleaning titanium gypsum filter cloth |
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| CN114733269A CN114733269A (en) | 2022-07-12 |
| CN114733269B true CN114733269B (en) | 2024-02-06 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB885383A (en) * | 1958-01-17 | 1961-12-28 | Gen Am Transport | Recovery of depleted chemical nickle plating baths |
| US4139465A (en) * | 1976-11-26 | 1979-02-13 | Nordengren Patenter Ab | Method for washing filter-cakes and a spray nozzle intended for use with the method |
| US4159308A (en) * | 1975-06-30 | 1979-06-26 | The University Of Melbourne | Mineral treatment |
| SU1342285A1 (en) * | 1986-02-25 | 1995-07-09 | Всесоюзный Государственный Научно-Исследовательский И Проектный Институт Химико-Фотографической Промышленности | Method of chemical-photographic treatment of halogen-silver photographic materials |
| JPH10137744A (en) * | 1996-11-11 | 1998-05-26 | Nec Corp | Treatment of waste water containing fluorine |
| WO2002004361A1 (en) * | 2000-07-07 | 2002-01-17 | Microbar, Inc. | System and method for simultaneous removal of arsenic and fluoride from aqueous solutions |
| CN101658746A (en) * | 2009-09-16 | 2010-03-03 | 朱峰 | Method for removing crystallization scales on plastic film filter plate of electroplating wastewater |
| CN108360070A (en) * | 2018-01-19 | 2018-08-03 | 西安建筑科技大学 | A kind of normal temperature modified method improving hemihydrate calcium sulfate crystal whisker stability |
| CN108373140A (en) * | 2018-02-26 | 2018-08-07 | 中南大学 | A method of removing fluorine from sulfate liquor |
| CN212166735U (en) * | 2019-11-27 | 2020-12-18 | 常州广威新材料科技有限公司 | Belt filter cloth belt cleaning device is used in calcium sulfate whisker production |
-
2022
- 2022-04-28 CN CN202210456247.9A patent/CN114733269B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB885383A (en) * | 1958-01-17 | 1961-12-28 | Gen Am Transport | Recovery of depleted chemical nickle plating baths |
| US4159308A (en) * | 1975-06-30 | 1979-06-26 | The University Of Melbourne | Mineral treatment |
| US4139465A (en) * | 1976-11-26 | 1979-02-13 | Nordengren Patenter Ab | Method for washing filter-cakes and a spray nozzle intended for use with the method |
| SU1342285A1 (en) * | 1986-02-25 | 1995-07-09 | Всесоюзный Государственный Научно-Исследовательский И Проектный Институт Химико-Фотографической Промышленности | Method of chemical-photographic treatment of halogen-silver photographic materials |
| JPH10137744A (en) * | 1996-11-11 | 1998-05-26 | Nec Corp | Treatment of waste water containing fluorine |
| WO2002004361A1 (en) * | 2000-07-07 | 2002-01-17 | Microbar, Inc. | System and method for simultaneous removal of arsenic and fluoride from aqueous solutions |
| CN101658746A (en) * | 2009-09-16 | 2010-03-03 | 朱峰 | Method for removing crystallization scales on plastic film filter plate of electroplating wastewater |
| CN108360070A (en) * | 2018-01-19 | 2018-08-03 | 西安建筑科技大学 | A kind of normal temperature modified method improving hemihydrate calcium sulfate crystal whisker stability |
| CN108373140A (en) * | 2018-02-26 | 2018-08-07 | 中南大学 | A method of removing fluorine from sulfate liquor |
| CN212166735U (en) * | 2019-11-27 | 2020-12-18 | 常州广威新材料科技有限公司 | Belt filter cloth belt cleaning device is used in calcium sulfate whisker production |
Non-Patent Citations (1)
| Title |
|---|
| Removal of F −and organic matter from coking wastewater by coupling dosing FeCl 3 and AlCl 3;Shuo Li等;《Journal of environmental sciences》 * |
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