CN114471489B - Novel modified diatomite filter aid for producing aluminum foil material and use method thereof - Google Patents
Novel modified diatomite filter aid for producing aluminum foil material and use method thereof Download PDFInfo
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- CN114471489B CN114471489B CN202210187319.4A CN202210187319A CN114471489B CN 114471489 B CN114471489 B CN 114471489B CN 202210187319 A CN202210187319 A CN 202210187319A CN 114471489 B CN114471489 B CN 114471489B
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- filter aid
- stirring tank
- lignocellulose
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- activated clay
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 97
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- 239000011888 foil Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 title claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 111
- 239000000314 lubricant Substances 0.000 claims abstract description 55
- 238000003756 stirring Methods 0.000 claims description 82
- 239000004927 clay Substances 0.000 claims description 57
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 48
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 48
- 239000000203 mixture Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 23
- 238000005086 pumping Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 14
- 239000002689 soil Substances 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 18
- 239000011148 porous material Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 description 5
- 239000005909 Kieselgur Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000005608 naphthenic acid group Chemical group 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to the technical field of aluminum foil rolling auxiliary materials, relates to filtration of aluminum foil lubricants, and particularly relates to a novel modified diatomite filter aid for producing aluminum foil materials and a use method thereof. The filter aid has the advantages of easily available raw materials and environment friendliness; the pore diameter can be adjusted according to the combination and the proportion of the raw materials, the filtering effect and the filtering speed can be considered, and the raw material cost is saved; the modified diatomite improves the content of silicon dioxide, and improves the low-grade diatomite into high-grade diatomite, so that the filtering effect is further improved.
Description
Technical Field
The invention belongs to the technical field of aluminum foil rolling auxiliary materials, relates to filtering of aluminum foil lubricants, and particularly relates to a novel modified diatomite filter aid for producing aluminum foil materials and a use method thereof.
Background
In the aluminum foil processing industry, the processing difficulty of ultra-thin aluminum foils is great. And the processing difficulty of producing ultrathin aluminum foil by adopting cast-rolled blanks is higher. The lubricant plays roles of bearing, washing, cooling and lubricating in the aluminum foil production process. Therefore, the lubricant is effectively cleaned in the subsequent processing process, and the quality of the ultrathin aluminum foil is very important to ensure. In this process, a large amount of lubricant is used, but during the use process, the lubricant is contaminated by fine particulate aluminum powder ground off the surface of the rolled strip and soluble impurities, the main components of which are resins, naphthenic acids and other chemical substances, and if the contaminants are not removed, the rolling conditions are deteriorated by rolling into the surface of the strip, so that the quality of the product is lowered, and therefore, an automatic filter device is required to be prepared on the rolling equipment, so that the impurities are removed by means of the filter aid.
With the increasing importance of society on environmental protection and resource consumption, the requirement on the environmental protection of the filter media is higher. In order to improve the environmental protection property of the filter medium and reduce the resource consumption, the novel filter medium and the lubricant filtering effect are urgently required.
The main components of conventional filter aids are diatomaceous earth and activated clay. Diatomite is a nonmetallic mineral, is siliceous biological sedimentary rock mainly composed of single-cell algae remains, has the excellent characteristics of high porosity, large specific surface area, strong adsorptivity and the like, and is widely applied to industries such as beverage, brewing, water treatment and the like. In the conventional application, diatomaceous earth is generally loaded as a filler in a filtering device, and then sewage to be treated is filtered, and after the diatomaceous earth filler is blocked, the diatomaceous earth is replaced. Such fillers tend to have lower demands on the strength of the filler particles and higher demands on their porosity.
The existing filter aid is poor in filtering effect or small in filtering quantity, and cannot meet the requirements of industrial production, so that the filter aid with good filtering effect, large filtering quantity and fast filtering is required to be developed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a novel modified diatomite filter aid for producing aluminum foil materials.
Technical proposal
A novel modified diatomite filter aid for producing aluminum foil material is composed of modified diatomite, activated clay, lignocellulose and ethylene-vinyl acetate copolymer, wherein the filter aid has different proportions at each stage, and different pore diameters are realized, so that the optimal filtering effect is achieved.
The filter aid for the first stage filtering stage consists of 10-15 Kg of modified diatomite, 2-5 Kg of activated clay, 0.2-0.5 Kg of lignocellulose and 0Kg of ethylene-vinyl acetate copolymer; the filter aid has larger pore diameter, mainly filters larger particles in the lubricant, mainly fine particle aluminum powder and the like, ensures the filtering speed by the larger particles, reduces the use of lignocellulose and ethylene-vinyl acetate copolymer, and reduces the cost of the filter aid.
The filter aid in the secondary filtering stage consists of 10-15 Kg of modified diatomite, 4-7 Kg of activated clay, 0.5-1 Kg of lignocellulose and 0.1-0.3 Kg of ethylene-vinyl acetate copolymer, and at the moment, the amounts of lignocellulose and ethylene-vinyl acetate copolymer are properly increased, the pore diameter of the filter aid is reduced, and the filtering effect on fine particles is improved.
The filter aid in the three-stage filtering stage consists of 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 2-5 Kg of lignocellulose and 1-1.5 Kg of ethylene-vinyl acetate copolymer, and at the moment, the amount of lignocellulose and ethylene-vinyl acetate copolymer is properly increased, so that the pore diameter of the filter aid is further reduced, the filtering effect on fine particles is improved, and meanwhile, the adsorption on soluble impurity resin, naphthenic acid and other chemical substances is increased.
The filter aid in the four-stage filtering stage consists of 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 5-8 Kg of lignocellulose and 3-6 Kg of ethylene-vinyl acetate copolymer, and at this time, the amount of lignocellulose and ethylene-vinyl acetate copolymer is properly increased, so that the pore diameter of the filter aid is further reduced, and the adsorption of chemical substances such as soluble impurity resin, naphthenic acid and the like is increased.
In the preferred embodiment of the invention, the weight of filter aid can be used to treat 10 to 15 kiloliters of lubricant, preferably 12 to 15 kiloliters, more preferably 13 kiloliters, and the lubricant flow is 3500 to 4000 liters/min.
The invention also discloses a using method of the filter aid, which comprises the following steps:
1. a primary filtering stage: emptying the stirring tank, adding 10-15 kg of modified diatomite, 2-5 kg of activated clay and 0.2-0.5 kg of lignocellulose, pumping the mixture into a lubricant to be filtered until the liquid level is 90%, setting the filtering speed to be 3-4 h/stirring tank, namely completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 3-4 h;
2. and (3) a secondary filtering stage: adding 10-15 Kg of modified diatomite, 4-7 Kg of activated clay, 0.5-1 Kg of lignocellulose and 0.1-0.3 Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of liquid level, setting the filtering speed to be 4-6 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank for 4-6 h;
3. three-stage filtration: adding 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 2-5 Kg of lignocellulose and 1-1.5 Kg of ethylene-vinyl acetate copolymer into a stirring tank, adding filter soil, pumping clean lubricant into the stirring tank until the liquid level is 90%, pumping the lubricant to be filtered until the liquid level is 90%, setting the filtering speed to be 5-7 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 5-7 h;
4. four stages of filtration: adding 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 5-8 Kg of lignocellulose and 3-6 Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of liquid level, setting the filtering speed to be 7-9 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 7-9 h.
Step 1 further preferably, 12kg of modified diatomite, 3kg of activated clay and 0.3kg of lignocellulose are added into a stirring tank; setting the filtering speed to be 3 h/stirring tank;
step 2 further preferably, 13Kg of modified diatomite, 5Kg of activated clay, 0.75Kg of lignocellulose and 0.2Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, and the filtration speed is set to be 5 h/stirring tank;
step 3 further preferably, 14Kg of modified diatomite, 7Kg of activated clay, 3Kg of lignocellulose and 1.2Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, and the filtration speed is set to be 6 h/stirring tank;
in step 4, it is further preferable to add 12Kg of modified diatomaceous earth, 7Kg of activated clay, 7Kg of lignocellulose, and 5Kg of ethylene-vinyl acetate copolymer to a stirring tank and set the filtration rate to 8 h/stirring tank.
Further preferably, the modified diatomaceous earth is prepared by the following method:
crushing and screening mine raw soil to 6-8 meshes, treating the mine raw soil by using sulfuric acid solution, calcining the mine raw soil at high temperature, washing, press-filtering the mine raw soil by using hot water, drying and screening the mine raw soil to obtain coarse and fine modified diatomite.
Wherein, the ratio of the mine raw soil to the sulfuric acid solution is 1 g: 10-15 ml, the calcination temperature is 900-1200 ℃, and the diatomite liquid after reaction is washed and filter-pressed by hot water with the temperature of 80-100 ℃.
After the modification by the method, the impurities such as aluminum oxide, ferric oxide and the like contained in the original diatomite are easy to dissolve in acid, the generated sulfate is removed, and the low-grade diatomite is purified to obtain the high-grade filter aid. After the treatment, the silicon dioxide is improved to 98 percent from the original 60 percent, and basically does not contain aluminum oxide, ferric oxide and the like.
Advantageous effects
(1) According to the invention, the aluminum foil lubricant is filtered by adopting the modified diatomite, the activated clay, the lignocellulose and the ethylene-vinyl acetate copolymer, so that the raw materials are easily available, and the environment is protected;
(2) The invention adopts modified diatomite, activated clay, lignocellulose and ethylene-vinyl acetate copolymer as the filtering agent, the pore diameter of which can be adjusted according to the combination and proportion of raw materials, and the filtering effect and the filtering speed can be taken into account;
(3) The invention adopts the staged filtering agent, can give consideration to the filtering effect and the filtering speed, and saves the cost of raw materials;
(4) The modified diatomite improves the content of silicon dioxide, and improves the low-grade diatomite into high-grade diatomite, so that the filtering effect is further improved.
Detailed Description
The present invention will be described in detail with reference to the following examples, so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following examples.
1. Example 1
The proportions of the filter aids in the four stages are as follows: a primary filtering stage: 12kg of modified diatomite, 3kg of activated clay and 0.3kg of lignocellulose; and (3) a secondary filtering stage: 13Kg of modified diatomite, 5Kg of activated clay, 0.75Kg of lignocellulose and 0.2Kg of ethylene-vinyl acetate copolymer; three-stage filtration: 14Kg of modified diatomite, 7Kg of activated clay, 3Kg of lignocellulose and 1.2Kg of ethylene-vinyl acetate copolymer; four stages of filtration: 12Kg of modified diatomite, 7Kg of activated clay, 7Kg of lignocellulose and 5Kg of ethylene-vinyl acetate copolymer.
A method of filtering aluminum foil lubricant using a filter aid comprising the steps of:
(1) Stage one filtering: emptying the stirring tank, adding 12kg of modified diatomite, 3kg of activated clay and 0.3kg of lignocellulose, pumping the mixture into the lubricant to be filtered until the liquid level is 90%, setting the filtering speed to be 3 h/stirring tank, namely completely discharging the mixture of the lubricant and the filter aid in the stirring tank in 3 hours;
(2) Two-stage filtering: 13Kg of modified diatomite, 5Kg of activated clay, 0.75Kg of lignocellulose and 0.2Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, the lubricant to be filtered is pumped into the stirring tank until the liquid level is 90%, the filtering speed is set to be 5 h/the stirring tank, namely, the mixture of the lubricant and the filter aid in the stirring tank is completely discharged within 5 hours;
(3) Third stage filtering: adding 14Kg of modified diatomite, 7Kg of activated clay, 3Kg of lignocellulose and 1.2Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of the liquid level, setting the filtering speed to be 6 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 6 hours;
(4) Four-stage filtering stage: 12Kg of modified diatomite, 7Kg of activated clay, 7Kg of lignocellulose and 5Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, the lubricant to be filtered is pumped into the stirring tank until the liquid level is 90%, the filtering speed is set to be 8 h/stirring tank, namely the mixture of the lubricant and the filter aid in the stirring tank is completely discharged within 8 h.
And (3) detecting a filtering effect: the filtering period is 22 hours, the light transmittance is more than or equal to 95 percent, the filtering period is shorter, and the filtering effect is better.
2. Example 2
The proportions of the filter aids in the four stages are as follows: a primary filtering stage: 13kg of modified diatomite, 3.5kg of activated clay and 0.4kg of lignocellulose; and (3) a secondary filtering stage: 11Kg of modified diatomite, 6Kg of activated clay, 0.8Kg of lignocellulose and 0.3Kg of ethylene-vinyl acetate copolymer; three-stage filtration: 12Kg of modified diatomite, 6Kg of activated clay, 4Kg of lignocellulose and 1.5Kg of ethylene-vinyl acetate copolymer; four stages of filtration: 12Kg of modified diatomite, 8Kg of activated clay, 8Kg of lignocellulose and 6Kg of ethylene-vinyl acetate copolymer.
A method of filtering aluminum foil lubricant using a filter aid comprising the steps of:
(1) Stage one filtering: emptying the stirring tank, adding 13kg of modified diatomite, 3.5kg of activated clay and 0.4kg of lignocellulose, pumping the mixture into a lubricant to be filtered until the liquid level is 90%, setting the filtering speed to be 3.5 h/stirring tank, namely completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 3.5 h;
(2) Two-stage filtering: 131Kg of modified diatomite, 6Kg of activated clay, 0.8Kg of lignocellulose and 0.3Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, the lubricant to be filtered is pumped into the stirring tank until the liquid level is 90%, the filtering speed is set to be 6 h/the stirring tank, namely, the mixture of the lubricant and the filter aid in the stirring tank is completely discharged within 6 hours;
(3) Third stage filtering: adding 12Kg of modified diatomite, 6Kg of activated clay, 4Kg of lignocellulose and 1.5Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of the liquid level, setting the filtering speed to be 6.5 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 6.5 hours;
(4) Four-stage filtering stage: 12Kg of modified diatomite, 8Kg of activated clay, 8Kg of lignocellulose and 6Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, the lubricant to be filtered is pumped into the stirring tank until the liquid level is 90%, the filtering speed is set to be 9 h/stirring tank, namely the mixture of the lubricant and the filter aid in the stirring tank is completely discharged within 9 h.
And (3) detecting a filtering effect: the filtering period is 25 hours, the light transmittance is more than or equal to 93.5 percent, the filtering period is shorter, and the filtering effect is better.
3. Example 3
The proportions of the filter aids in the four stages are as follows: a primary filtering stage: 15kg of modified diatomite, 4kg of activated clay and 0.4kg of lignocellulose; and (3) a secondary filtering stage: 11Kg of modified diatomite, 7Kg of activated clay, 0.9Kg of lignocellulose and 0.3Kg of ethylene-vinyl acetate copolymer; three-stage filtration: 13Kg of modified diatomite, 6Kg of activated clay, 5Kg of lignocellulose and 1.5Kg of ethylene-vinyl acetate copolymer; four stages of filtration: 15Kg of modified diatomite, 8Kg of activated clay, 8Kg of lignocellulose and 6Kg of ethylene-vinyl acetate copolymer.
A method of filtering aluminum foil lubricant using a filter aid comprising the steps of:
(1) Stage one filtering: emptying the stirring tank, adding 15kg of modified diatomite, 4kg of activated clay and 0.4kg of lignocellulose, pumping the mixture into the lubricant to be filtered until the liquid level is 90%, setting the filtering speed to be 4 h/stirring tank, namely completely discharging the mixture of the lubricant and the filter aid in the stirring tank in 4 hours;
(2) Two-stage filtering: adding 11Kg of modified diatomite, 7Kg of activated clay, 0.9Kg of lignocellulose and 0.3Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of the liquid level, setting the filtering speed to be 6 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 6 hours;
(3) Third stage filtering: 13Kg of modified diatomite, 6Kg of activated clay, 5Kg of lignocellulose and 1.5Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, the lubricant to be filtered is pumped into the stirring tank until the liquid level is 90%, the filtering speed is set to be 7 h/stirring tank, namely, the mixture of the lubricant and the filter aid in the stirring tank is completely discharged within 7 hours;
(4) Four-stage filtering stage: 15Kg of modified diatomite, 8Kg of activated clay, 8Kg of lignocellulose and 6Kg of ethylene-vinyl acetate copolymer are added into a stirring tank, the lubricant to be filtered is pumped into the stirring tank until the liquid level is 90%, the filtering speed is set to be 9 h/stirring tank, namely the mixture of the lubricant and the filter aid in the stirring tank is completely discharged within 9 hours.
And (3) detecting a filtering effect: the filtering period is 26 hours, the light transmittance is more than or equal to 94.5 percent, the filtering period is shorter, and the filtering effect is better.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. The modified diatomite filter aid for producing aluminum foil materials is characterized by comprising modified diatomite, activated clay, lignocellulose and ethylene-vinyl acetate copolymer, wherein the filter aid has different proportions at each stage, and specifically comprises the following components:
the filter aid in the first stage consists of 10-15 kg of modified diatomite, 2-5 kg of activated clay and 0.2-0.5 kg of lignocellulose;
the filter aid for the secondary filtration stage consists of 10-15 Kg of modified diatomite, 4-7 Kg of activated clay, 0.5-1 Kg of lignocellulose and 0.1-0.3 Kg of ethylene-vinyl acetate copolymer;
the filter aid for the three-stage filtration stage consists of 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 2-5 Kg of lignocellulose and 1-1.5 Kg of ethylene-vinyl acetate copolymer;
the filter aid for the four-stage filtering stage consists of 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 5-8 Kg of lignocellulose and 3-6 Kg of ethylene-vinyl acetate copolymer;
wherein, the modified diatomite is prepared by the following method:
crushing and screening mine raw soil to 6-8 meshes, treating the mine raw soil with sulfuric acid solution, calcining the mine raw soil at high temperature, washing, press-filtering the mine raw soil with hot water, drying and screening the mine raw soil to obtain coarse and fine modified diatomite;
wherein, the ratio of the mine raw soil to the sulfuric acid solution is 1 g: 10-15 ml, the calcination temperature is 900-1200 ℃, and the diatomite liquid after reaction is washed and filter-pressed by hot water with the temperature of 80-100 ℃.
2. The modified diatomaceous earth filter aid for producing an aluminum foil material according to claim 1, wherein the filter aid for the primary filtration stage consists of 12kg of modified diatomaceous earth, 3kg of activated clay and 0.3kg of lignocellulose.
3. The modified diatomaceous earth filter aid for producing aluminum foil materials according to claim 1, wherein the secondary filtration stage filter aid consists of 13Kg of modified diatomaceous earth, 5Kg of activated clay, 0.75Kg of lignocellulose and 0.2Kg of ethylene-vinyl acetate copolymer.
4. The modified diatomaceous earth filter aid for producing aluminum foil materials according to claim 1, wherein the three-stage filtration stage filter aid consists of 14Kg of modified diatomaceous earth, 7Kg of activated clay, 3Kg of lignocellulose and 1.2Kg of ethylene-vinyl acetate copolymer.
5. The modified diatomaceous earth filter aid for producing aluminum foil materials according to claim 1, wherein the filter aid for the four-stage filtration stage consists of 12Kg of modified diatomaceous earth, 7Kg of activated clay, 7Kg of lignocellulose and 5Kg of ethylene-vinyl acetate copolymer.
6. The method of using the modified diatomaceous earth filter aid of claim 1 for producing aluminum foil material, comprising the steps of:
(1) Stage one filtering: emptying the stirring tank, adding 10-15 kg of modified diatomite, 2-5 kg of activated clay and 0.2-0.5 kg of lignocellulose, pumping the mixture into a lubricant to be filtered until the liquid level is 90%, setting the filtering speed to be 3-4 h/stirring tank, namely completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 3-4 h;
(2) Two-stage filtering: adding 10-15 Kg of modified diatomite, 4-7 Kg of activated clay, 0.5-1 Kg of lignocellulose and 0.1-0.3 Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of liquid level, setting the filtering speed to be 4-6 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank for 4-6 h;
(3) Third stage filtering: adding 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 2-5 Kg of lignocellulose and 1-1.5 Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of liquid level, setting the filtering speed to be 5-7 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 5-7 h;
(4) Four-stage filtering stage: adding 10-15 Kg of modified diatomite, 5-8 Kg of activated clay, 5-8 Kg of lignocellulose and 3-6 Kg of ethylene-vinyl acetate copolymer into a stirring tank, pumping the lubricant to be filtered to 90% of liquid level, setting the filtering speed to be 7-9 h/stirring tank, namely, completely discharging the mixture of the lubricant and the filter aid in the stirring tank within 7-9 h.
7. The method of using the modified diatomaceous earth filter aid for producing aluminum foil material according to claim 6, wherein 12kg of modified diatomaceous earth, 3kg of activated clay and 0.3kg of lignocellulose are added into the stirring tank in the step (1); the filtration rate was set at 3 h/stirred tank.
8. The method of using the modified diatomaceous earth filter aid for producing aluminum foil material according to claim 6, wherein 13Kg of modified diatomaceous earth, 5Kg of activated clay, 0.75Kg of lignocellulose and 0.2Kg of ethylene-vinyl acetate copolymer are added to the stirring tank in the step (2), and the filtration rate is set to 5 h/stirring tank.
9. The method of using a modified diatomaceous earth filter aid for producing an aluminum foil material according to claim 6, wherein 14Kg of modified diatomaceous earth, 7Kg of activated clay, 3Kg of lignocellulose and 1.2Kg of ethylene-vinyl acetate copolymer are added to a stirring tank in the step (3), and the filtration rate is set to 6 h/stirring tank.
10. The method of using a modified diatomaceous earth filter aid for producing an aluminum foil material according to claim 6, wherein 12Kg of modified diatomaceous earth, 7Kg of activated clay, 7Kg of lignocellulose and 5Kg of ethylene-vinyl acetate copolymer are added to a stirring tank in the step (4), and the filtration rate is set to 8 h/stirring tank.
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| JP2003200009A (en) * | 2001-12-28 | 2003-07-15 | Kobe Steel Ltd | Filter aid for cold rolling mill lubricant and filtering method for the same |
| WO2003064013A1 (en) * | 2002-01-31 | 2003-08-07 | Koslow Technologies Corporation | Microporous filter media, filtration systems containing same, and methods of making and using |
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| CN110893296A (en) * | 2019-11-29 | 2020-03-20 | 江苏大亚铝业有限公司 | Filter aid for aluminum foil rolling oil and use method thereof |
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| US6660172B2 (en) * | 2002-01-31 | 2003-12-09 | Koslow Technologies Corporation | Precoat filtration media and methods of making and using |
| US20180200654A1 (en) * | 2014-12-19 | 2018-07-19 | Ep Minerals, Llc | Non-Respirable Powdered Diatomaceous Earth Products |
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| WO2003064013A1 (en) * | 2002-01-31 | 2003-08-07 | Koslow Technologies Corporation | Microporous filter media, filtration systems containing same, and methods of making and using |
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