CN114522992B - Method for recycling aluminum wiredrawing lubricating liquid - Google Patents
Method for recycling aluminum wiredrawing lubricating liquid Download PDFInfo
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- CN114522992B CN114522992B CN202210219916.0A CN202210219916A CN114522992B CN 114522992 B CN114522992 B CN 114522992B CN 202210219916 A CN202210219916 A CN 202210219916A CN 114522992 B CN114522992 B CN 114522992B
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- lubricating liquid
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- aluminum
- precipitate
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- 239000007788 liquid Substances 0.000 title claims abstract description 112
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 109
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 59
- 238000005491 wire drawing Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 13
- 239000008394 flocculating agent Substances 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 37
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 21
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 21
- 239000000920 calcium hydroxide Substances 0.000 claims description 21
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 21
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 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
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 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
- 239000002245 particle Substances 0.000 abstract description 24
- 239000002244 precipitate Substances 0.000 abstract description 16
- 239000003513 alkali Substances 0.000 abstract description 14
- 229910017090 AlO 2 Inorganic materials 0.000 abstract description 6
- 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
- 230000001788 irregular Effects 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 14
- 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
- 239000011575 calcium Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000010790 dilution Methods 0.000 description 6
- 239000012895 dilution Substances 0.000 description 6
- 239000013049 sediment Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- 235000019445 benzyl alcohol Nutrition 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 239000012530 fluid 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
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000203 mixture 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
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation 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
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 wiredrawing lubricating liquid, which comprises the steps of firstly removing large irregular impurities by using a coarse filter screen arranged in a No. 1 pool, and improving the efficiency, purity and recovery rate of subsequent precipitation reaction; adding Ca alkali to precipitate the aluminum powder (2Al+2H) 2 O+Ca(OH) 2 ＝Ca(AlO 2 ) 2 +3H 2 ) Because the aluminum powder particles are fine, the reaction speed is high, and meanwhile, the generated precipitate is small, so that a flocculating agent is added into a No. 2 pool to flocculate and deposit the precipitate; the fine filter screen in the No. 3 pond is in order to collect the precipitate to a greater extent, prevent to flow out for the precipitate that complex was arrived, selects novel filter screen material to be pc/abs, is because its intensity and toughness are high, can strike, is convenient for collect the precipitate to a greater extent, selects carbonic acid to adjust pH in the No. 3 pond, firstly can adjust pH, secondly can react with unnecessary alkali and produce the precipitate, eliminates the influence of alkali to the lubricating liquid performance, and the fine filter screen in the No. 4 pond is in order to filter completely.
Description
Technical Field
The invention relates to a method for recycling aluminum wiredrawing lubricating liquid.
Background
In the wire drawing production process of the aluminum wire, lubricating liquid is needed to lubricate, cool and resist oxidation. The lubricating fluid is a mixture of lubricating oil, water and an antioxidant, and comprises the following components: 84-92% of lubricating oil, 4-8% of water and 2-10% of antioxidant. However, in actual production, aluminum blocks with different particle diameters are inevitably generated and doped into the lubricating liquid. The aluminum block in the lubricating liquid can reduce the lubricating effect, so that the product is scratched or peeled, the quality of the product is affected, and meanwhile, aluminum impurities exist in the lubricating liquid and can also cause the waste of aluminum resources.
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 filtering method, and the aluminum powder with the particle size of less than 100 microns is separated by adopting a centrifugal method. However, in the practical operation process, there are many problems in the centrifugal method, such as that the density of the lubricating liquid and the density of aluminum differ less, the viscosity of the lubricating liquid is greater, the aluminum powder with the particle size of less than 100 microns is mainly suspended in the lubricating liquid, the complete separation of the lubricating liquid and the aluminum block is difficult to realize, the separation efficiency is lower, and the separation effect is poor. Meanwhile, the lubricating liquid can be purified only by adopting a centrifugal method, and other impurities in the lubricating liquid become wastes which cannot be used. At present, after the lubricating liquid is polluted, the novel lubricating liquid is usually adopted for dilution, so that the content of aluminum powder is reduced, and the problem is not fundamentally solved.
The aluminum alloy wire drawing device aims at the problem that the loss of materials is inevitably generated when the aluminum alloy wire drawing device is pulled from a large diameter to a small diameter in the aluminum wire drawing process, aluminum powder and even small aluminum blocks are generated, the lost aluminum material is mixed into lubricating liquid, and the lubricating liquid is circulated to a lubricating liquid storage tank. According to the current centrifugation or filtration mode, the aluminum powder is difficult to completely remove and recycle. However, aluminum powder existing in the lubricating liquid can scratch the surface of a product, more aluminum powder is generated to enter the lubricating liquid to cause vicious circle, and meanwhile, the aluminum powder can pollute the lubricating liquid to cause poor effect and easily block equipment after entering the lubricating liquid.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for recycling aluminum wiredrawing lubricating liquid, which can deeply remove aluminum powder in the lubricating liquid, realize recycling of the lubricating liquid and recycle aluminum powder or aluminum blocks in the lubricating liquid.
The method for recycling the aluminum wiredrawing lubricating liquid comprises the following steps of:
1) In the wire drawing process, the liquid level of the lubricating liquid is required to be level with the wire drawing wheel, the lubricating liquid is recycled, the wire drawing lubricating liquid enters a No. 1 pool, a filter screen is arranged at the inlet of the No. 1 pool, and primary filtration is carried out; the lubricating liquid after primary filtration enters a No. 1 pool, and the mass percentage 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 to enable the lubricating liquid to react with the fine-grained aluminum powder in the lubricating liquid; then flows into a 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 the inlet of the No. 3 tank and is used for filtering impurities with the diameter of more than 30 mu m, saturated carbonic acid solution is added into the lubricating liquid entering the No. 3 tank after the filtering is finished, the pH value of the lubricating liquid is regulated to be 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 pool and is used for filtering impurities with the diameter of more than 30 mu m, after the filtering is finished, the lubricating liquid flows into the No. 5 pool, and the No. 5 pool is used for storing the lubricating liquid and is reused in the wire drawing process;
5) Periodically knocking out substances on the No. 1 pool filter screen in the step 1) to obtain pure aluminum consumable materials; the knocked-out substance on the No. 3 pond fine filter screen is calcium aluminate, and alumina can be obtained after cleaning and sintering.
In the step 1), the filter screen is a 150-mesh filter screen.
In the step 1), the mass percentage of the added calcium hydroxide powder is related to the mass percentage of aluminum in the lubricating liquid, and theoretical calculation is performed according to a chemical reaction equation: w (W) Ca(OH)2 ＝1.37 * ρ Lubricating liquid *V*Wt (Al) Preferably, the mass of the added calcium hydroxide is 70-90% of theoretical calculation.
Preferably, the lubricating fluid is used only once, and calcium hydroxide is added to the lubricating fluid in a mass percentage of (0.01 to 0.1)%.
In the step 2), the filter screen is a 300-mesh filter screen.
In the step 2), the flocculant consists of PVB, PVA, n-butanol and benzyl alcohol, and the mass percentage of the flocculant is as follows: PVB: 30-50% of PVA, 30-50% of n-butanol: 2-7% of benzyl alcohol, 2-7% of total 100%; the addition amount of the lubricant is 0.0003 to 0.00005 percent relative to the mass of the lubricant.
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 as the product of the rhyme bell filter material company.
The principle of the invention is as follows: the invention firstly utilizes the coarse filter screen arranged in the No. 1 pool to mainly remove massive abnormal impurities, thereby improving the efficiency, purity and recovery rate of the subsequent precipitation reaction; adding Ca alkali to precipitate the aluminum powder (2Al+2H) 2 O+Ca(OH) 2 ＝Ca(AlO 2 ) 2 +3H 2 ) Because the aluminum powder particles are fine, the reaction speed is high, and meanwhile, the generated precipitate is small, so that a flocculating agent is added into a No. 2 pool to flocculate and deposit the precipitate; the fine filter screen in the No. 3 pool is used for collecting sediment to a larger extent, complex is prevented from flowing out, the novel filter screen material is pc/abs, the novel filter screen material is high in strength and toughness, knocking can be carried out, the sediment can be collected to a larger extent conveniently, the pH value of the No. 3 pool is regulated by carbonic acid, firstly, the pH value can be regulated, secondly, the novel filter screen can react with redundant alkali to generate sediment, the influence of alkali on the performance of lubricating liquid is eliminated, and the fine filter screen in the No. 4 pool is used for completely filtering.
The invention has the beneficial effects that: 1) Aiming at superfine aluminum powder particles which are difficult to remove by filtration, the method adopts the calcium-alkali reaction and precipitation generated by the calcium-alkali reaction to remove the superfine aluminum powder particles, thereby reducing the influence on the quality of aluminum wires in the production process. 2) The invention aims at Ca (AlO) generated by calcium-alkali reaction 2 ) 2 The particle size of the sediment is relatively small, and the characteristic of difficult removal is that the sediment is precipitated by adopting a flocculating agent to form large-particle sediment and removed by 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 liquid with low impurity content is obtained and is used for the wire drawing process, so that the safety problem caused by dilution of the lubricating liquid in the wire drawing process is solved. 3) The aluminum powder and the aluminum oxide separated by the method can be directly sold or prepared into pure aluminum by adopting an electrolysis method, so that the production cost of enterprises is reduced, the requirements of green production are met, and no pollution is caused to the environment.
Detailed Description
Example 1
The method for separating and recycling the aluminum powder mainly comprises the following steps: in the wire drawing process, the liquid level of the lubricating liquid is required to be flush with a wire drawing wheel, the equipment can normally perform wire drawing work, the lubricating liquid is recycled, and 5 lubrication liquid storage tanks of 2m and 3m and 2m are arranged behind the wire drawing machine. The lubricating liquid is a mixture of lubricating liquid, water and an antioxidant, and has the effects of lubrication, temperature reduction and oxidation resistance in the wire drawing process.
The five lubrication storage tanks are respectively named as No. 1, no. 2, no. 3, no. 4 and No. 5 tanks, the lubrication storage tanks are respectively provided with filtering devices with different effects, and the height of the lubrication liquid in the No. 1 tank is 1.5m.
A common filter screen with 150 meshes is arranged at the inlet of the No. 1 pool, and lubricating liquid is subjected to rough filtration through the filter screen to remove aluminum particles with the particle size of more than 100 microns. And (3) carrying out component test on the lubricating liquid after rough filtration to obtain the aluminum with the mass percentage of 0.08%. The mass of the added calcium hydroxide powder is 85% of the theoretical addition amount, and according to the density and the volume of the lubricating liquid, the mass of the calcium hydroxide powder is calculated to be 1.37-0.8 (2-3-1.5) -1.0-10 3 *0.08% 0.85=6.71 Kg. Fully stirring to enable tiny aluminum particles in the lubricating liquid to fully react with alkali to generate precipitate, wherein the chemical reaction formula is as follows: 2Al+2H 2 O+Ca(OH) 2 ＝Ca(AlO 2 ) 2 +3H 2 After the reaction is finished, the wastewater flows into a No. 2 pool.
Adding flocculant with the mass of 0.0003% relative to lubricating liquid into a No. 2 pool, wherein the flocculant comprises PVB:48%, PVA:48%, n-butanol: 2%, benzyl alcohol: 2%. After stirring and flocculation, the precipitate is bonded and flows into a No. 3 pool.
A fine filter screen of a novel material, pc/abs, is arranged at the inlet of the No. 3 pool, and can filter the complex above 30 microns. After the filtration is finished, adding saturated carbonic acid solution into the No. 3 pool to adjust the pH to 6.8-7.2, and flowing into the No. 4 pool.
A fine filter screen of a novel material pc/abs is arranged at the inlet of a No. 4 pool, the filtering is carried out again, the filtered lubricating liquid enters a No. 5 storage pool, and the content of impurity aluminum of the lubricating liquid can be obtained to be lower than 105ppm through testing, and the lubricating liquid can be circulated to a wire drawing machine without dilution.
Taking out the filter screen in each pool regularly according to the production condition, knocking out the aluminum consumable, wherein the filter screen in the pool 1 is pure aluminum after being directly dried; the No. 3 and No. 4 pond filter screens are calcium aluminate, and aluminum oxide is generated through cleaning and heating.
Example 2
The five lubrication storage tanks are respectively named as No. 1, no. 2, no. 3, no. 4 and No. 5 tanks, the lubrication storage tanks are respectively provided with filtering devices with different effects, and the height of the lubrication liquid in the No. 1 tank is 1.5m.
A common filter screen with 150 meshes is arranged at the inlet of the No. 1 pool, and lubricating liquid is subjected to rough filtration through the filter screen to remove aluminum particles with the particle size of more than 100 microns. And (3) carrying out component test on the lubricating liquid after rough filtration to obtain the aluminum with the mass percentage of 0.064%. The mass of the added calcium hydroxide powder is 85% of the theoretical addition amount, and according to the density and the volume of the lubricating liquid, the mass of the calcium hydroxide powder is calculated to be 1.37-0.8 (2-3-1.5) -1.0-10 3 * 0.064%. 0.85=5.37 Kg. Fully stirring to enable tiny aluminum particles in the lubricating liquid to fully react with alkali to generate precipitate, wherein the chemical reaction formula is as follows: 2Al+2H 2 O+Ca(OH) 2 ＝Ca(AlO 2 ) 2 +3H 2 After the reaction is finished, the wastewater flows into a No. 2 pool.
0.0005% relative to the mass of lubricating liquid is added into a No. 2 pool, the flocculating agent comprises 47% of PVB, 48% of PVA and n-butanol: 3%, benzyl alcohol 2%; after stirring and flocculation, the precipitate is bonded and flows into a No. 3 pool.
A fine filter screen made of novel materials is arranged at the inlet of the No. 3 pool, the novel filter screen is pc/abs, aluminum materials with the particle size of more than 30 microns can be filtered, and after the filtration is finished, saturated carbonic acid solution is added into the No. 3 pool to adjust the pH value to 6.8-7.2, so that lubricating liquid is weakly alkaline and flows into the No. 4 pool.
A fine filter screen of a novel material pc/abs is arranged at the inlet of a No. 4 pool, the filtering is carried out again, the filtered lubricating liquid enters a No. 5 storage pool, and the content of impurity aluminum is lower than 98ppm through testing, and the lubricating liquid can be circulated to a wire drawing machine without dilution.
Taking out the filter screen in each pool regularly according to the production condition, knocking out the aluminum consumable, wherein the filter screen in the pool 1 is pure aluminum after being directly dried; the No. 3 and No. 4 pond filter screens are calcium aluminate, and aluminum oxide is generated through cleaning and heating.
Example 3
The five lubrication storage tanks are respectively named as No. 1, no. 2, no. 3, no. 4 and No. 5 tanks, the lubrication storage tanks are respectively provided with filtering devices with different effects, and the height of the lubrication liquid in the No. 1 tank is 1.5m.
A common filter screen with 150 meshes is arranged at the inlet of the No. 1 pool, and lubricating liquid is subjected to rough filtration through the filter screen to remove aluminum particles with the particle size of more than 100 microns. And (3) carrying out component test on the lubricating liquid after rough filtration to obtain the aluminum with the mass percentage of 0.08%. The mass of the added calcium hydroxide powder is 70% of the theoretical addition amount, and according to the density and the volume of the lubricating liquid, the mass of the calcium hydroxide powder is calculated to be 1.37-0.8 (2-3-1.5) -1.0-10 3 *0.08% 0.7=5.52 Kg. Fully stirring to enable tiny aluminum particles in the lubricating liquid to fully react with alkali to generate precipitate, wherein the chemical reaction formula is as follows: 2Al+2H 2 O+Ca(OH) 2 ＝Ca(AlO 2 ) 2 +3H 2 After the reaction is finished, the wastewater flows into a No. 2 pool.
Adding flocculant with the mass of 0.0003% relative to lubricating liquid into a No. 2 pool, wherein the flocculant comprises PVB:48%, PVA:48%, n-butanol: 2%, benzyl alcohol: 2%. After stirring and flocculation, the precipitate is bonded and flows into a No. 3 pool.
A fine filter screen of a novel material, pc/abs, is arranged at the inlet of the No. 3 pool, and can filter the complex above 30 microns. After the filtration is finished, adding saturated carbonic acid solution into the No. 3 pool to adjust the pH to 6.8-7.2, and flowing into the No. 4 pool.
A fine filter screen of a novel material pc/abs is arranged at the inlet of a No. 4 pool, the filtering is carried out again, the filtered lubricating liquid enters a No. 5 storage pool, and the content of impurity aluminum is lower than 194ppm through testing, and the lubricating liquid can be circulated to a wire drawing machine without dilution.
Taking out the filter screen in each pool regularly according to the production condition, knocking out the aluminum consumable, wherein the filter screen in the pool 1 is pure aluminum after being directly dried; the No. 3 and No. 4 pond filter screens are calcium aluminate, and aluminum oxide is generated through cleaning and heating.
Comparative example 1
The method is compared with examples 1 and 3, and the mass of the added calcium hydroxide powder is 60% of the theoretical addition amount compared with example 1; i.e. 1.37 x 0.8*(2*3*1.5)*1.0*10 3 *0.08% 0.6=4.73 Kg. The removal effect is shown in Table 1;
the removal effect was not ideal and the aluminum content was still higher compared to examples 1 and 2.
Example 4
The five lubrication storage tanks are respectively named as No. 1, no. 2, no. 3, no. 4 and No. 5 tanks, the lubrication storage tanks are respectively provided with filtering devices with different effects, and the height of the lubrication liquid in the No. 1 tank is 1.5m.
A common filter screen with 150 meshes is arranged at the inlet of the No. 1 pool, and lubricating liquid is subjected to rough filtration through the filter screen to remove aluminum particles with the particle size of more than 100 microns. And (3) carrying out component test on the lubricating liquid after rough filtration to obtain the aluminum with the mass percentage of 0.08%. The mass of the added calcium hydroxide powder is 85% of the theoretical addition amount, and according to the density and the volume of the lubricating liquid, the mass of the calcium hydroxide powder is calculated to be 1.37-0.8 (2-3-1.5) -1.0-10 3 *0.08% 0.85=6.71 Kg. Fully stirring to enable tiny aluminum particles in the lubricating liquid to fully react with alkali to generate precipitate, wherein the chemical reaction formula is as follows: 2Al+2H 2 O+Ca(OH) 2 ＝Ca(AlO 2 ) 2 +3H 2 After the reaction is finished, the wastewater flows into a No. 2 pool.
0.0005% of flocculant relative to the mass of lubricating liquid is added into a No. 2 pool, wherein the flocculant comprises PVB:48%, PVA:48%, n-butanol: 2%, benzyl alcohol: 2%. After stirring and flocculation, the precipitate is bonded and flows into a No. 3 pool.
A fine filter screen of a novel material, pc/abs, is arranged at the inlet of the No. 3 pool, and can filter the complex above 30 microns. After the filtration is finished, adding saturated carbonic acid solution into the No. 3 pool to adjust the pH to 6.8-7.2, and flowing into the No. 4 pool.
A fine filter screen of a novel material pc/abs is arranged at the inlet of a No. 4 pool, the filtering is carried out again, the filtered lubricating liquid enters a No. 5 storage pool, and the content of impurity aluminum is lower than 102ppm through testing, and the lubricating liquid can be circulated to a wire drawing machine without dilution.
Taking out the filter screen in each pool regularly according to the production condition, knocking out the aluminum consumable, wherein the filter screen in the pool 1 is pure aluminum after being directly dried; the No. 3 and No. 4 pond filter screens are calcium aluminate, and aluminum oxide is generated through cleaning and heating.
Comparative example 2
The method was compared with examples 1 and 4, except that the flocculant was changed and the addition amount was reduced to 0.0002%.
Compared with examples 1 and 4, the effect on aluminum removal is not great, and the aluminum content is slightly increased.
In summary, within a certain range, the more the mass of calcium hydroxide is added, the more the flocculant is contained, and the better the effect of filtering aluminum is.
Claims (5)
1. A method for recycling aluminum wiredrawing lubricating liquid comprises the following steps:
1) In the wire drawing process, the liquid level of the lubricating liquid is required to be level with the wire drawing wheel, the lubricating liquid is recycled, the wire drawing lubricating liquid enters a No. 1 pool, a filter screen is arranged at the inlet of the No. 1 pool, and primary filtration is carried out; the lubricating liquid after primary filtration 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 to enable the lubricating liquid to react with fine-grained aluminum powder in the lubricating liquid; then flows into a 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 the inlet of the No. 3 tank and is used for filtering impurities with the diameter of more than 30 mu m, saturated carbonic acid solution is added into lubricating liquid entering the No. 3 tank after the filtering is finished, the pH value of the lubricating liquid is regulated 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 pool and is used for filtering impurities with the diameter of more than 30 mu m, after the filtering is finished, the lubricating liquid flows into the No. 5 pool, and the No. 5 pool is used for storing the lubricating liquid and is reused in the wire drawing process;
periodically knocking out substances on the No. 1 pool filter screen in the step 1) to obtain pure aluminum consumable materials; the knocked-out substance on the No. 3 pond fine filter screen is calcium aluminate, and alumina can be obtained after cleaning and sintering;
in the step 1), the mass percentage of the added calcium hydroxide powder is related to the mass percentage of aluminum in the lubricating liquid, and theoretical calculation is performed according to a chemical reaction equation: w (W) Ca(OH)2 =1.37 * ρ Lubricating liquid *V*Wt (Al) The mass of the added calcium hydroxide is 70-90% of that calculated in theory;
in the step 2), the flocculant consists of PVB, PVA, n-butanol and benzyl alcohol, and the mass percentage of the flocculant is as follows: PVB: 30-50% of PVA, 30-50% of n-butanol: 2-7% of benzyl alcohol, 2-7% of total 100%; the mass addition amount of the lubricant is 0.0003-0.00005%.
2. The method for recycling aluminum wiredrawing lubricant according to claim 1, wherein in the step 1), the filter screen is a 150 mesh filter screen.
3. The method for recycling aluminum wiredrawing lubricating liquid according to claim 1, wherein the lubricating liquid is used once, and calcium hydroxide is added to the lubricating liquid until the mass percentage of the calcium hydroxide in the lubricating liquid is (0.01-0.1%).
4. The method for recycling aluminum wiredrawing lubricant according to claim 1, wherein in the step 3), the fine filter screen is pc/abs.
5. The method for recycling aluminum wiredrawing lubricant 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 | |
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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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| 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 |
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