CN114522992A - Method for recycling aluminum wire drawing lubricating liquid - Google Patents
Method for recycling aluminum wire drawing lubricating liquid Download PDFInfo
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- CN114522992A CN114522992A CN202210219916.0A CN202210219916A CN114522992A CN 114522992 A CN114522992 A CN 114522992A CN 202210219916 A CN202210219916 A CN 202210219916A CN 114522992 A CN114522992 A CN 114522992A
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- Prior art keywords
- lubricating liquid
- aluminum
- filter screen
- pool
- lubricating
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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 120
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005491 wire drawing Methods 0.000 title claims abstract description 29
- 238000004064 recycling Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 title claims description 89
- 238000001914 filtration Methods 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 33
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 29
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 28
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000008394 flocculating agent Substances 0.000 claims abstract description 9
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 8
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 6
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 239000010419 fine particle Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000003311 flocculating effect Effects 0.000 claims description 2
- 125000000914 phenoxymethylpenicillanyl group Chemical group CC1(S[C@H]2N([C@H]1C(=O)*)C([C@H]2NC(COC2=CC=CC=C2)=O)=O)C 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 abstract description 15
- 239000003513 alkali Substances 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 12
- 239000013049 sediment Substances 0.000 abstract description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 3
- 230000036632 reaction speed Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 14
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000011575 calcium Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 235000019445 benzyl alcohol Nutrition 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0025—Working-up used lubricants to recover useful products ; Cleaning by thermal processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for recycling aluminum wire drawing lubricating fluid, which comprises the steps of firstly utilizing a coarse filter screen arranged in a No. 1 pool to mainly remove large blocks of special-shaped impurities, and improving the efficiency, purity and recovery rate of subsequent precipitation reaction; and Ca alkali is added to precipitate (2Al + 2H) aluminum powder2O+Ca(OH)2＝Ca(AlO2)2+3H2) Because the aluminum powder particles are fine, the reaction speed is high, and meanwhile, the generated precipitate is small, a flocculating agent is added into the No. 2 pool to flocculate and deposit the precipitate; the fine filter screen in No. 3 pond is for furthest collecting the precipitate, prevent to flow for the sediment of complex to, choose for use novel filter screen material to be pc/abs, because its intensity and toughness are high, can strike, be convenient for with the furthest collection of precipitate, select in No. 3 pond to adjust pH with carbonic acid, firstly can adjust pH, secondly can react with unnecessary alkali and generate the sediment, eliminate the influence of alkali to the lubricating fluid performance, No. 4 pondThe fine screen is used for filtering completely.
Description
Technical Field
The invention relates to a method for recycling aluminum wire drawing lubricating liquid.
Background
During the wire drawing production process of the aluminum wire, lubricating liquid is needed to lubricate, cool and resist oxidation of the aluminum wire. The lubricating fluid is a mixture of lubricating oil, water and antioxidant, and comprises the following components in percentage by weight: 84-92% of lubricating oil, 4-8% of water and 2-10% of antioxidant. However, in actual production, aluminum lumps having different particle diameters are inevitably generated and mixed in the lubricating fluid. The aluminum block in the lubricating liquid can reduce the lubricating effect, cause the product fish tail or skinning, influence the quality of product, and aluminum impurity also can cause the waste of aluminium resource in existing lubricating liquid simultaneously.
The lubricating liquid-Al powder mixed solution mainly comprises aluminum powder with the particle size of more than 100 microns and less than 100 microns, wherein the aluminum powder with the particle size of more than 100 microns can be removed by a physical filtration method, and most of the aluminum powder with the particle size of less than 100 microns is separated by a centrifugal method. However, in the actual operation process, the centrifugation method has many problems, for example, the difference between the density of the lubricating liquid and the density of aluminum is small, the viscosity of the lubricating liquid is large, aluminum powder with the particle size of less than 100 micrometers is mainly suspended in the lubricating liquid, complete separation of the lubricating liquid and an aluminum block is difficult to achieve, the separation efficiency is low, and the separation effect is poor. Meanwhile, only the lubricating liquid can be purified by adopting a centrifugal method, and other impurities in the lubricating liquid become wastes and cannot be used. At present, after the lubricating liquid is polluted, the lubricating liquid is diluted by adopting a new lubricating liquid, so that the content of aluminum powder is reduced, and the problem is not solved fundamentally.
Aiming at the problem that the loss of materials is inevitably generated when the aluminum is drawn from a large diameter to a small diameter in the aluminum drawing process of the company, aluminum powder or even small aluminum blocks are generated, and the lost aluminum materials are mixed into the lubricating liquid and circulate to the lubricating liquid storage pool along with the lubricating liquid. According to the current centrifugation or filtration mode, complete removal and recycling of aluminum powder are difficult to realize. However, the aluminum powder in the lubricating liquid can scratch the surface of the product, and more aluminum powder is generated to enter the lubricating liquid, so that vicious circle is caused, and meanwhile, after the aluminum powder enters the lubricating liquid, the lubricating liquid is polluted, so that the effect is poor, and the equipment is easy to block.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for recycling aluminum wire drawing lubricating fluid, which can deeply remove aluminum powder in the lubricating fluid, realize recycling of the lubricating fluid and realize recycling of the aluminum powder or aluminum blocks in the lubricating fluid.
The method for recycling the aluminum wire drawing lubricating fluid comprises the following steps:
1) in the wire drawing process, the liquid level of the lubricating liquid is flush with the wire drawing wheel, the lubricating liquid is recycled, the wire-drawn lubricating liquid enters the No. 1 pool, and a filter screen is arranged at the inlet of the No. 1 pool for primary filtration; the lubricating liquid after primary filtration enters a No. 1 pool, and the mass percent Wt of aluminum in the lubricating liquid in the No. 1 pool is tested(Al)Then adding calcium hydroxide into the lubricating liquid, and stirring the mixture to react with the fine-particle aluminum powder in the lubricating liquid; then flows into No. 2 pool;
2) adding a flocculating agent into the lubricating liquid in the No. 2 pool, stirring and flocculating, and then entering the No. 3 pool;
3) a fine filter screen is arranged at an inlet of the No. 3 tank and used for filtering impurities with the particle size of more than 30 microns, after the filtration is finished, a saturated carbonic acid solution is added into the lubricating liquid entering the No. 3 tank, the pH value of the lubricating liquid is adjusted to 6.8-7.2, and then the lubricating liquid flows into the No. 4 tank;
4) a fine filter screen is arranged at the inlet of the No. 4 tank and is used for filtering impurities above 30um, after filtering is finished, the lubricating liquid flows into the No. 5 tank, and the No. 5 tank is used for storing the lubricating liquid and is reused for the wire drawing process;
5) removing substances on the filter screen of the No. 1 tank in the step 1) periodically to obtain pure aluminum consumables; and (3) taking calcium aluminate as a substance knocked out from the No. 3 pool fine filter screen, and cleaning and sintering to obtain recovered alumina.
In the step 1), the filter screen is a 150-mesh filter screen.
In the step 1), the mass percent of the added calcium hydroxide powder is related to the mass percent of aluminum in the lubricating fluid, and theoretical calculation is carried out according to a chemical reaction equation: wCa(OH)2＝1.37*ρLubricating liquid*V*Wt(Al)Preferably, the mass of the added calcium hydroxide is 70-90% of the theoretical calculation.
Preferably, the lubricating fluid is used only once, and the calcium hydroxide is added to the lubricating fluid until the mass percentage of the calcium hydroxide in the lubricating fluid is (0.01-0.1)%.
In the step 2), the filter screen is a 300-mesh filter screen.
In the step 2), the flocculating agent is composed of PVB, PVA, n-butanol and benzyl alcohol, and the mass percentage of the compound is as follows: PVB: 30-50%, PVA 30-50%, n-butyl alcohol: 2-7% of benzyl alcohol, and 2-7% of benzyl alcohol, wherein the total amount is 100%; the amount of the lubricant added is 0.0003 to 0.00005% by mass relative to the lubricating fluid.
In the step 3), the fine filter screen is pc/abs, and the mesh number of the filter screen is 500 meshes.
In the step 4), the fine filter screen is pc/abs, and the mesh number of the filter screen is 500 meshes.
The invention adopts a fine filter screen pc/abs which is produced by Yunling Filter materials Co.
The principle of the invention is as follows: firstly, a coarse filter screen arranged in a No. 1 pool is mainly used for removing large and special-shaped impurities, so that the efficiency, the purity and the recovery rate of the subsequent precipitation reaction are improved; and adding Ca alkali to precipitate (2Al + 2H) aluminum powder2O+Ca(OH)2＝Ca(AlO2)2+3H2) Because the aluminum powder has fine particles and high reaction speed and the generated precipitate is small, the flocculating agent is added into the No. 2 tank to flocculate and deposit the precipitate; the fine filter screen in No. 3 pond is for furthest collects the precipitate, prevents to precipitate for the complex and flows out, chooses for use novel filter screen material to be pc/abs, because of its intensity and toughness are high, can strike, be convenient for with the furthest collection of precipitate, select in No. 3 pond to adjust pH with carbonic acid, can adjust pH firstly, can react with unnecessary alkali and generate the sediment, eliminate the influence of alkali to the lubricating fluid performance, the fine filter screen in No. 4 pond is for filtering completely.
The invention has the beneficial effects that: 1) aiming at the superfine aluminum powder particles which are difficult to remove by filtration, the method adopts calcium-alkali reaction and precipitation generated by the calcium-alkali reaction to remove the superfine aluminum particles and reduce the influence on the quality of the aluminum wire in the production process. 2) The invention aims at Ca (AlO) generated by calcium alkali reaction2)2The particle size of the precipitate is relatively small and notThe removal characteristic is good, the flocculant is adopted to carry out coagulation on the waste water to form large-particle precipitates, and the large-particle precipitates are removed through a fine filter screen; the redundant alkali is further neutralized by carbonic acid solution, so that the pH value of the lubricating liquid meets the use requirement; finally, the circulating lubricating fluid with low impurity content is obtained and used for the drawing process, and the safety problem caused by dilution of the lubricating fluid in the drawing process is solved. 3) The aluminum powder and the alumina separated by the method can be directly sold or the pure aluminum is prepared by adopting an electrolysis method, so that the production cost of enterprises is reduced, the requirement of green production is met, and the method has no pollution to the environment.
Detailed Description
Example 1
A method for separating and recycling aluminum powder mainly comprises the following steps: in the wire drawing process, the liquid level of the lubricating liquid is parallel and level to the wire drawing wheel, the equipment can normally perform wire drawing work, the lubricating liquid is recycled, and 5 lubricating liquid storage pools of 2m 3m 2m are arranged behind the wire drawing machine. The lubricating liquid is a mixture of the lubricating liquid, water and an antioxidant, and can play roles in lubricating, cooling and resisting oxidation in the wire drawing process.
The five lubricating liquid storage tanks are named as No. 1, No. 2, No. 3, No. 4 and No. 5 tanks respectively, filtering devices with different effects are arranged in the lubricating liquid storage tanks respectively, and the height of the lubricating liquid in the No. 1 tank is 1.5 m.
A150-mesh common filter screen is arranged at the inlet of the No. 1 tank, and the lubricating liquid is roughly filtered by the filter screen to remove aluminum particles with the particle size of more than 100 microns. And performing component test on the lubricant after rough filtration to obtain 0.08 mass percent of aluminum. The mass of the calcium hydroxide powder added is 85% of the theoretical addition, and the mass of the calcium hydroxide powder is calculated to be 1.37 x 0.8 (2 x 3 x 1.5) 1.0 x 10 according to the density and the volume of the lubricating fluid30.08%. 0.85 ═ 6.71 Kg. Fully stirring to ensure that tiny aluminum particles in the lubricating liquid and alkali fully react to generate precipitates, wherein the chemical reaction formula is as follows: 2Al +2H2O+Ca(OH)2＝Ca(AlO2)2+3H2And after the reaction is finished, the reaction solution flows into a No. 2 pool.
Adding 0.0003% of flocculant relative to the mass of the lubricating liquid into the No. 2 tank, wherein the flocculant comprises PVB: 48%, PVA: 48%, n-butanol: 2%, benzyl alcohol: 2 percent. After stirring and flocculation, the sediment is bonded and flows into a No. 3 pool.
A fine filter screen made of a novel material is arranged at the inlet of the No. 3 pool, and the novel filter screen is made of pc/abs and can filter a complex with the particle size of more than 30 microns. And after filtering, adding a saturated carbonic acid solution into the No. 3 pool to adjust the pH value to 6.8-7.2, and flowing into the No. 4 pool.
A fine filter screen made of pc/abs novel materials is arranged at the inlet of the No. 4 tank, filtering is carried out again, the filtered lubricating liquid enters the No. 5 storage tank, and the content of impurity aluminum in the lubricating liquid is lower than 105ppm and can be obtained through testing without dilution and can be circulated to a wire drawing machine.
Taking out the filter screen in each pool periodically according to the production condition, knocking out the aluminum consumables, wherein the filter screen in the No. 1 pool is pure aluminum after being directly dried; the filter screens of the No. 3 and No. 4 pools are calcium aluminate, and the alumina is generated by cleaning and heating.
Example 2
The five lubricating liquid storage tanks are named as No. 1, No. 2, No. 3, No. 4 and No. 5 tanks respectively, filtering devices with different effects are arranged in the lubricating liquid storage tanks respectively, and the height of the lubricating liquid in the No. 1 tank is 1.5 m.
A150-mesh common filter screen is arranged at the inlet of the No. 1 tank, and the lubricating liquid is roughly filtered by the filter screen to remove aluminum particles with the particle size of more than 100 microns. And performing component test on the lubricant after rough filtration to obtain 0.064 mass percent of aluminum. The mass of the calcium hydroxide powder added is 85% of the theoretical addition, and the mass of the calcium hydroxide powder is calculated to be 1.37 x 0.8 (2 x 3 x 1.5) 1.0 x 10 according to the density and the volume of the lubricating fluid30.064% 0.85 ═ 5.37 Kg. Fully stirring to ensure that tiny aluminum particles in the lubricating liquid and alkali fully react to generate precipitates, wherein the chemical reaction formula is as follows: 2Al +2H2O+Ca(OH)2＝Ca(AlO2)2+3H2And after the reaction is finished, the reaction solution flows into a No. 2 pool.
0.0005% relative to the mass of the lubricating liquid, and the flocculating agent comprises 47% of PVB, 48% of PVA, and n-butanol: 3 percent of benzyl alcohol, 2 percent of benzyl alcohol; after stirring and flocculation, the sediment is bonded and flows into a No. 3 pool.
The inlet of No. 3 pond is equipped with the fine filter screen of novel material, and novel filter screen material is pc/abs, can filter the aluminum product more than 30 microns, and the back of finishing filtering adds saturated carbonic acid solution and adjusts pH to 6.8 ~ 7.2 in No. 3 pond, makes the lubricating liquid present weak alkaline, flows into No. 4 pond.
A fine filter screen made of a novel material pc/abs is installed at the inlet of the No. 4 tank, filtering is performed again, the filtered lubricating liquid enters the No. 5 storage tank, and the content of impurity aluminum is lower than 98ppm and can be obtained through testing without dilution and can be circulated to a wire drawing machine.
Taking out the filter screen in each pool periodically according to the production condition, knocking out the aluminum consumables, wherein the filter screen in the No. 1 pool is pure aluminum after being directly dried; the filter screens of the No. 3 and No. 4 pools are calcium aluminate, and the aluminum oxide is generated by cleaning and heating.
Example 3
The five lubricating liquid storage tanks are named as No. 1, No. 2, No. 3, No. 4 and No. 5 tanks respectively, filtering devices with different effects are arranged in the lubricating liquid storage tanks respectively, and the height of the lubricating liquid in the No. 1 tank is 1.5 m.
A150-mesh common filter screen is arranged at the inlet of the No. 1 tank, and the lubricating liquid is roughly filtered by the filter screen to remove aluminum particles with the particle size of more than 100 microns. And performing component test on the lubricant after rough filtration to obtain 0.08 mass percent of aluminum. The mass of the calcium hydroxide powder added is 70% of the theoretical addition amount, and the mass of the calcium hydroxide powder is calculated to be 1.37 x 0.8 (2 x 3 x 1.5) 1.0 x 10 according to the density and the volume of the lubricating fluid30.08%. 0.7 ═ 5.52 Kg. Fully stirring to ensure that tiny aluminum particles in the lubricating liquid and alkali fully react to generate precipitates, wherein the chemical reaction formula is as follows: 2Al +2H2O+Ca(OH)2＝Ca(AlO2)2+3H2And after the reaction is finished, the reaction solution flows into a No. 2 pool.
Adding 0.0003% of flocculant relative to the mass of the lubricating liquid into the No. 2 tank, wherein the flocculant comprises PVB: 48%, PVA: 48%, n-butanol: 2%, benzyl alcohol: 2 percent. After stirring and flocculation, the sediment is bonded and flows into a No. 3 pool.
A fine filter screen made of a novel material is arranged at the inlet of the No. 3 pool, and the novel filter screen is made of pc/abs and can filter a complex with the particle size of more than 30 microns. And after filtering, adding a saturated carbonic acid solution into the No. 3 pool to adjust the pH value to 6.8-7.2, and flowing into the No. 4 pool.
A fine filter screen made of pc/abs is installed at the inlet of the No. 4 tank, filtering is performed again, the filtered lubricating liquid enters the No. 5 storage tank, and the content of impurity aluminum is lower than 194ppm through testing, so that the impurity aluminum does not need to be diluted and can be circulated to a wire drawing machine.
Taking out the filter screen in each pool periodically according to the production condition, knocking out the aluminum consumables, wherein the filter screen in the No. 1 pool is pure aluminum after being directly dried; the No. 3 and No. 4 pool filter screens are calcium aluminate, and are cleaned and heated to generate alumina.
Comparative example 1
Compared with the examples 1 and 3, the method only changes the mass of the added calcium hydroxide compared with the example 1, and the mass of the added calcium hydroxide powder is 60 percent of the theoretical addition amount; i.e. 1.37 x 0.8 x (2 x 3 x 1.5 x 1.0 x 10)30.08%. 0.6 ═ 4.73 Kg. The removal effect is shown in table 1;
compared with examples 1 and 2, the removal effect is not ideal, and the aluminum content is still higher.
Example 4
The five lubricating liquid storage tanks are named as No. 1, No. 2, No. 3, No. 4 and No. 5 tanks respectively, filtering devices with different effects are arranged in the lubricating liquid storage tanks respectively, and the height of the lubricating liquid in the No. 1 tank is 1.5 m.
A150-mesh common filter screen is arranged at the inlet of the No. 1 tank, and the lubricating liquid is roughly filtered by the filter screen to remove aluminum particles with the particle size of more than 100 microns. And performing component test on the lubricant after rough filtration to obtain 0.08 mass percent of aluminum. The mass of the calcium hydroxide powder added is 85% of the theoretical addition, and the mass of the calcium hydroxide powder is calculated to be 1.37 x 0.8 (2 x 3 x 1.5) 1.0 x 10 according to the density and the volume of the lubricating fluid30.08%. 0.85 ═ 6.71 Kg. Fully stirring to ensure that tiny aluminum particles in the lubricating liquid and alkali fully react to generate precipitates, wherein the chemical reaction formula is as follows: 2Al +2H2O+Ca(OH)2＝Ca(AlO2)2+3H2And after the reaction is finished, the reaction solution flows into a No. 2 pool.
To tank No. 2 was added 0.0005% by mass of the lubricating fluid of a flocculating agent consisting of PVB: 48%, PVA: 48%, n-butanol: 2%, benzyl alcohol: 2 percent. After stirring and flocculation, the sediment is bonded and flows into a No. 3 pool.
A fine filter screen made of a novel material is arranged at the inlet of the No. 3 pool, and the novel filter screen is made of pc/abs and can filter a complex with the particle size of more than 30 microns. And after filtering, adding a saturated carbonic acid solution into the No. 3 pool to adjust the pH value to 6.8-7.2, and flowing into the No. 4 pool.
A fine filter screen made of pc/abs novel materials is arranged at the inlet of the No. 4 tank, filtering is carried out again, the filtered lubricating liquid enters the No. 5 storage tank, and the content of impurity aluminum is lower than 102ppm and can be obtained through testing without dilution and can be circulated to a wire drawing machine.
Taking out the filter screen in each pool periodically according to the production condition, knocking out the aluminum consumables, wherein the filter screen in the No. 1 pool is pure aluminum after being directly dried; the filter screens of the No. 3 and No. 4 pools are calcium aluminate, and the alumina is generated by cleaning and heating.
Comparative example 2
Compared with the method of examples 1 and 4, the method only changes the flocculating agent and reduces the addition amount to 0.0002%.
Compared with examples 1 and 4, the effect on aluminum removal is less, and the aluminum content is slightly increased.
In conclusion, within a certain range, the more calcium hydroxide is added, the more flocculant is contained, and the better the aluminum filtering effect is.
Claims (7)
1. A method for recycling aluminum wire drawing lubricating fluid comprises the following steps:
1) in the wire drawing process, the liquid level of the lubricating liquid is flush with the wire drawing wheel, the lubricating liquid is recycled, the wire-drawn lubricating liquid enters the No. 1 pool, and a filter screen is arranged at the inlet of the No. 1 pool for primary filtration; the primarily filtered lubricating liquid enters a No. 1 pool, the content of aluminum in the lubricating liquid in the No. 1 pool is tested, then calcium hydroxide is added into the lubricating liquid, and stirring is carried out, so that the lubricating liquid reacts with fine-particle aluminum powder in the lubricating liquid; then flows into No. 2 pool;
2) adding a flocculating agent into the lubricating liquid in the No. 2 pool, stirring and flocculating, and then entering the No. 3 pool;
3) a fine filter screen is arranged at an inlet of the No. 3 tank and used for filtering impurities with the particle size of more than 30 microns, after the filtration is finished, a saturated carbonic acid solution is added into the lubricating liquid entering the No. 3 tank, the pH value of the lubricating liquid is adjusted to 6.8-7.2, and then the lubricating liquid flows into the No. 4 tank;
4) a fine filter screen is arranged at the inlet of the No. 4 tank and is used for filtering impurities above 30um, after filtering is finished, the lubricating liquid flows into the No. 5 tank, and the No. 5 tank is used for storing the lubricating liquid and is reused for the wire drawing process;
5) removing substances on the filter screen of the No. 1 tank in the step 1) periodically to obtain pure aluminum consumables; and (3) taking calcium aluminate as a substance knocked out from the No. 3 pool fine filter screen, and cleaning and sintering to obtain recovered alumina.
2. The method for recycling the aluminum wiredrawing lubricating fluid as claimed in claim 1, wherein in the step 1), the filter screen is a 150-mesh filter screen.
3. The method for recycling the aluminum wire drawing lubricating fluid according to claim 1, wherein in the step 1), the mass percent of the added calcium hydroxide powder is related to the mass percent of aluminum in the lubricating fluid, and the theoretical calculation is carried out according to a chemical reaction equation: wCa(OH)2＝1.37*ρLubricating liquid*V*Wt(Al)And the mass of the added calcium hydroxide is 70-90% of the theoretical calculation.
4. The method for recycling the aluminum wiredrawing lubricating fluid according to claim 3, wherein the lubricating fluid is used only once, and the calcium hydroxide is added until the mass percentage of the calcium hydroxide in the lubricating fluid is (0.01-0.1)%.
5. The method for recycling the aluminum wiredrawing lubricating fluid according to claim 1, wherein in the step 2), the flocculating agent is composed of PVB, PVA, n-butanol and benzyl alcohol, and the mass percentage of the compound is as follows: PVB: 30-50%, PVA 30-50%, n-butyl alcohol: 2-7% of benzyl alcohol, and 2-7% of benzyl alcohol, wherein the total amount is 100%; the amount of the lubricant added is 0.0003 to 0.00005% by mass relative to the lubricating fluid.
6. The method for recycling the aluminum wiredrawing lubricating fluid as claimed in claim 1, wherein in the step 3), the fine filter screen is pc/abs.
7. The method for recycling the aluminum wiredrawing lubricating fluid according to claim 1, wherein in the step 4), the fine filter screen is pc/abs.
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| CA624512A (en) * | 1961-07-25 | C. Milz Wendell | Reclamation of aluminum fabricating lubricants | |
| EP3404083A1 (en) * | 2017-05-17 | 2018-11-21 | Hydro Aluminium Rolled Products GmbH | Washing method for rolling and dressing oils |
| CN208213956U (en) * | 2018-05-09 | 2018-12-11 | 浙江应利成材料科技有限公司 | A kind of aluminium enamel-covered wire lubrication fluid circulation |
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| CN212236323U (en) * | 2020-04-30 | 2020-12-29 | 曲靖昆缆东电线缆有限公司 | Centrifugal wire drawing liquid separation filter equipment |
| CN113403134A (en) * | 2021-06-23 | 2021-09-17 | 江西省科学院能源研究所 | Copper wire drawing oil waste liquid treatment method |
| CN113862074A (en) * | 2021-11-04 | 2021-12-31 | 河北中科同创科技发展有限公司 | Method and device for recovering drawing oil in metal wire drawing oil sludge |
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2022
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA624512A (en) * | 1961-07-25 | C. Milz Wendell | Reclamation of aluminum fabricating lubricants | |
| EP3404083A1 (en) * | 2017-05-17 | 2018-11-21 | Hydro Aluminium Rolled Products GmbH | Washing method for rolling and dressing oils |
| CN208213956U (en) * | 2018-05-09 | 2018-12-11 | 浙江应利成材料科技有限公司 | A kind of aluminium enamel-covered wire lubrication fluid circulation |
| KR20200097401A (en) * | 2019-02-08 | 2020-08-19 | 주식회사 나산 | Metal Ion Extraction Device of Lubricant for Wet Wire Drawing |
| CN110643418A (en) * | 2019-10-23 | 2020-01-03 | 蒋陆肆 | Treatment method of waste aluminum wire drawing oil |
| CN212236323U (en) * | 2020-04-30 | 2020-12-29 | 曲靖昆缆东电线缆有限公司 | Centrifugal wire drawing liquid separation filter equipment |
| CN113403134A (en) * | 2021-06-23 | 2021-09-17 | 江西省科学院能源研究所 | Copper wire drawing oil waste liquid treatment method |
| CN113862074A (en) * | 2021-11-04 | 2021-12-31 | 河北中科同创科技发展有限公司 | Method and device for recovering drawing oil in metal wire drawing oil sludge |
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