CN118204316A - Device and method for removing paint on surface of aluminum material and application - Google Patents
Device and method for removing paint on surface of aluminum material and application Download PDFInfo
- Publication number
- CN118204316A CN118204316A CN202410470849.9A CN202410470849A CN118204316A CN 118204316 A CN118204316 A CN 118204316A CN 202410470849 A CN202410470849 A CN 202410470849A CN 118204316 A CN118204316 A CN 118204316A
- Authority
- CN
- China
- Prior art keywords
- paint
- aluminum
- aluminum material
- removal
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 191
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 190
- 239000003973 paint Substances 0.000 title claims abstract description 138
- 239000000463 material Substances 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000007789 gas Substances 0.000 claims abstract description 35
- 229910000838 Al alloy Inorganic materials 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 210000002381 plasma Anatomy 0.000 abstract description 54
- 239000002699 waste material Substances 0.000 abstract description 19
- 239000000956 alloy Substances 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 7
- 230000008018 melting Effects 0.000 abstract description 7
- 239000011159 matrix material Substances 0.000 abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 230000036541 health Effects 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 36
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 12
- 239000002245 particle Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 238000001878 scanning electron micrograph Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 241000565357 Fraxinus nigra Species 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- IADRPEYPEFONML-UHFFFAOYSA-N [Ce].[W] Chemical compound [Ce].[W] IADRPEYPEFONML-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 ore exploitation Chemical compound 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- WLTSUBTXQJEURO-UHFFFAOYSA-N thorium tungsten Chemical compound [W].[Th] WLTSUBTXQJEURO-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a removal device, a removal method and application of paint on the surface of an aluminum product, wherein the removal device comprises a plasma generator, a direct current power supply, a gas cylinder and a mobile platform; the structure is simple, and the device can be used for efficiently removing paint on the surface of the aluminum material; the device is used for removing the aluminum material at the position with the surface distance of 25-30 cm from the aluminum material to be paint removed, so that the quick, efficient and green clean paint removal is realized. The method can be used for efficiently removing paint on the surface of the aluminum material, and can also be used for removing paint on workpieces with complex shapes and structures such as slits, holes and the like; the surface of the aluminum product workpiece does not need to be dried after being bombarded by the plasmas, so that the working procedure is simplified, the cost is saved, and the subsequent process of regenerating and melting the aluminum scrap alloy is facilitated; not only can remove dirt, but also can not cause damage and performance change of the matrix material; the paint removing method is environment-friendly, does not use chemical reagents, does not generate waste liquid and waste gas, does not cause environmental pollution, and can also ensure the personal safety and health of operators.
Description
Technical Field
The invention relates to the field of metal material recycling, in particular to a removal device, a removal method and application of paint on the surface of an aluminum material.
Background
The recycled aluminum (Recycled Aluminum) is an aluminum alloy or aluminum metal obtained by re-smelting waste aluminum and waste aluminum alloy materials or aluminum-containing scraps, and is an important source of metal aluminum. Compared with the original aluminum, the production of the regenerated aluminum does not need to go through the production flow of the original aluminum such as ore exploitation, alumina production by an alkaline method, aluminum electrolysis production and the like, thereby simplifying the manufacturing process of the product and having obvious advantages in the aspects of energy consumption and pollutant emission.
At present, paint which is not removed from the surface of a reclaimed aluminum raw material, namely a waste aluminum product, is a primary source of impurity elements of the reclaimed aluminum product. The surfaces of the waste aluminum products are mostly covered with paint coatings of more than 100 mu m, and the paint layers are composed of inorganic compounds such as chlorine-containing organic matters, titanium dioxide (TiO 2), barium sulfate (BaSO 4) and the like.
The conventional paint removing method comprises high-temperature baking, ultrahigh-pressure water spraying, chemical paint removing and the like, and has obvious defects of low efficiency and serious secondary pollution. For example, organic high molecular polymers in paints undergo a pyrolysis-oxy-combustion process at high temperatures during the baking and paint stripping process at high temperatures. The process not only generates a large amount of greenhouse gases, but also enables the incomplete inorganic compounds to enter the aluminum alloy liquid in the later stage melting link to form dispersed inclusions in the alloy liquid, so that the regenerated aluminum product is degraded for use, and the low-grade cast aluminum alloy is formed.
Disclosure of Invention
The invention mainly aims to provide a removal method and application of aluminum surface paint, and aims to solve the problems of low efficiency, serious secondary pollution and the like in the prior art for removing the aluminum surface paint.
In order to achieve the aim, the invention provides a removal device for paint on the surface of an aluminum product, which comprises a plasma generator, a direct current power supply, a gas cylinder and a mobile platform.
The plasma generator comprises a nozzle arranged at the lower part, and a cathode and an anode which are arranged in the inner cavity, wherein the cathode and the anode are electrically connected with the direct current power supply.
The working power of the direct current power supply is 12-12.5 kW.
The gas cylinder is communicated with the inner cavity of the plasma generator.
The moving platform is positioned below the nozzle.
Further, the anode and the nozzle are of an integral structure.
The invention also provides a method for removing paint on the surface of the aluminum material, which comprises the following steps: placing the aluminum material to be paint removed on a moving platform of the aluminum material surface paint removing device, and removing the aluminum material to be paint removed by plasma jet flow sprayed out of a nozzle of the aluminum material surface paint removing device; and cleaning the surface of the aluminum product subjected to the removal treatment to obtain the aluminum product subjected to paint removal.
Wherein the distance between the nozzle and the surface of the aluminum material to be paint removed is 25-30 cm.
Further, the working gas of the removal treatment is nitrogen.
Further, the flow rate of the working gas for the removal treatment is 0.5-1 m 3/h.
Further, the flow rate of the working gas in the arcing stage of the plasma generator is 0.8-1 m 3/h; the flow speed of the working gas in the plasma jet stabilization stage is 0.5-0.8 m 3/h.
Further, the duration of the removal treatment is 15-20 s.
Further, the cleaning treatment mode comprises one or more of brushing, erasing and blowing removal of the surface of the aluminum product after the removal treatment.
The invention also provides application of the removal method in any one of the aluminum materials to be paint removed, wherein the thickness of the paint coating of the aluminum materials to be paint removed is 50-150 mu m.
Further, the aluminum material to be paint-removed comprises a 6-series aluminum alloy section.
The invention has the beneficial effects that:
The device for removing the paint on the surface of the aluminum material works with constant current with the precision higher than 1%, and the working power is 12-12.5 kW; the device simple structure can be used to high-efficient desorption aluminum product surface paint.
According to the method for removing the paint on the surface of the aluminum material, provided by the invention, the paint on the surface of the aluminum material is removed at the position with the distance of 25-30 cm from the surface of the aluminum material to be paint removed by a removing device (comprising a plasma generator) of the paint on the surface of the aluminum material, and the high-energy particles contained in plasma are utilized to bombard or activate the paint coating on the surface of the aluminum material, so that the paint is removed rapidly, efficiently and cleanly; and cleaning the surface of the aluminum product after the removal treatment to obtain the aluminum product after paint removal. The removal method can be used for efficiently removing paint on the surface of the aluminum material, and can also be used for removing paint on workpieces with complex shapes and structures such as slits, holes and the like; the surface of the aluminum product workpiece does not need to be dried after being bombarded by the plasmas, so that the working procedure is simplified, the cost is saved, and the subsequent process of regenerating and melting the aluminum scrap alloy is facilitated; the removing method belongs to non-contact paint removal, not only can remove dirt, but also can not cause damage and performance change of a matrix material; in addition, the method is an environment-friendly paint removing method, does not use chemical reagents, does not generate waste liquid and waste gas after paint removal, does not cause environmental pollution, and can also ensure the personal safety and health of operators.
The removal method is applied to the aluminum material to be paint removed, can treat waste aluminum and waste aluminum alloy materials or aluminum-containing waste materials in a large area, so as to provide high-quality regenerated aluminum raw materials for regeneration of the waste aluminum alloy, and has wide application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a removal apparatus for paint on an aluminum surface in accordance with an alternative embodiment of the present invention;
FIG. 2 is a photograph showing the surface of an aluminum material before and after removing the residual loose non-reactive components on the surface of the aluminum material in example 1 and comparative examples 1 to 3 of the present invention; wherein, (a) -1 is the aluminum material after the removal treatment by the aluminum material surface paint removal device in the embodiment 1; (a) -2 is the aluminum material after removal of the loose non-reactive components remaining on the surface of the aluminum material in example 1; (b) -1 is the aluminum product after the removal treatment by the aluminum product surface paint removal device in comparative example 1; (b) -2 is the aluminum material after removing the loose non-reactive components remaining on the surface of the aluminum material in comparative example 1; (c) -1 is the aluminum product after the removal treatment by a removal device for the paint on the surface of the aluminum product in comparative example 2; (c) -2 is the aluminum material after removing the loose non-reactive components remaining on the surface of the aluminum material in comparative example 2; (d) -1 is an aluminum material after the conventional baking and paint removing treatment in comparative example 3; (d) -2 is the aluminum material after removing the loose non-reactive components remaining on the surface of the aluminum material in comparative example 3;
FIG. 3 is an XRD contrast pattern of two different colored ember beds (Black ash, yellow ash) of examples 1 and 2, comparative example 3 of the present invention;
FIG. 4 is an SEM image of a Yellow-brown ember bed (Yellow ash) of example 1 of the invention; wherein, (a) is an SEM image of BaSO 4 monomer particles in a tan ember bed; (b) SEM images of BaSO 4、CaCO3 monomer particles in a tan ash bed; (c) SEM images of BaSO 4、CaCO3 bound particles in the tan ember bed;
FIG. 5 is an SEM image of a Black ash bed (Black ash) of comparative example 2, comparative example 3 of the present invention;
FIG. 6 is a graph showing the tensile strength of the aluminum materials after paint removal according to the present invention in example 1, comparative example 2 and comparative example 3.
The achievement of the object, functional features and advantages of the present invention will be further described with reference to the drawings in connection with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs and to which this application belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this application may be used to practice the application. It should be appreciated by those skilled in the art that as an illustration of the present document, "strength" may be expressed as strength, "Stress" may be expressed as Strain, and "Strain" may be expressed as Strain, without affecting the actual understanding of the present solution.
Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers. The materials or reagents required in the examples below are commercially available unless otherwise specified.
In order to solve the problems of low efficiency, serious secondary pollution and the like in the prior art for removing the paint on the surface of the aluminum product, the invention provides a removing device for the paint on the surface of the aluminum product, which comprises a plasma generator 3, a direct current power supply 1, a gas cylinder 2 and a mobile platform 11. Specifically, in an alternative embodiment, a schematic diagram of an apparatus for removing paint from an aluminum surface is shown in fig. 1.
The plasma generator 3 comprises a nozzle 8 arranged at the lower part, a cathode 5 and an anode arranged in the inner cavity, and the cathode 5 and the anode are electrically connected with the direct current power supply 1. Specifically, referring to fig. 1, when the removal device for paint on the surface of aluminum material is operated, the working gas in the gas cylinder 2 is conveyed to the discharge chamber 6 by the gas supply system, and is broken down under the action of the direct current power supply 1, so as to generate arc plasma, wherein the arc plasma is a non-transfer arc torch, and the anode also serves as a nozzle 8 of the torch. That is, the arc plasma is ejected from the nozzle 8 to form a plasma jet 9. And the electric connection end of the cathode 5 and the direct current power supply 1 is also coated with cooling water 4 so as to cool the cathode 5 when the plasma heats the electric arc and prevent the serious loss of the cathode caused by overheat of the gun body. The discharge end of the cathode 5 is provided with an arc column 7, and the concentrated energy in the arc column 7 can fully ionize the working gas, and the energy obtained in the electric field is transmitted to the gas to realize gas discharge so as to generate plasma. Wherein the material of the cathode 5 is tungsten, cerium-tungsten, thorium-tungsten or zirconium. The material of the cathode 5 is preferably tungsten. Tungsten as the material of the cathode 5 has a stronger working gas adaptability and a higher economical efficiency.
The working power of the direct current power supply 1 is 12-12.5 kW. Specifically, the direct current power supply 1 operates in a constant current operation mode with an accuracy higher than 1%. The high-precision constant current source has higher precision and lower fluctuation, and can provide stable and accurate current output on the premise that the power of the direct current power supply 1 is constant at 12-12.5 kW so as to ensure the stability of the arc plasma torch.
The gas cylinder 2 is communicated with the inner cavity of the plasma generator 3. Specifically, referring to fig. 1, the working gas may be delivered to the discharge chamber 6 of the plasma generator 3 through a gas conduit to provide an atmosphere of the working gas in the discharge chamber 6.
The moving platform 11 is located below the nozzle 8 of the plasma generator 3. Specifically, referring to fig. 1, the moving platform 11 may be an operating platform clamped on a clamp with adjustable height, and the removal distance of paint on the surface of the aluminum material can be determined by adjusting the position height of the moving platform 11. And moving the aluminum material 10 to be paint removed on the moving platform 11 along a suitable path while the plasma jet 9 of the plasma generator 3 is active, to effect removal of the entire paint coating or a desired portion of the paint coating. The optimum removal distance for removing paint on the surface of the aluminum material can also be determined by adjusting the position height of the plasma generator 3.
The device for removing the paint on the surface of the aluminum material works with constant current with the precision higher than 1%, and the working power is 12-12.5 kW; the device simple structure can be used to high-efficient desorption aluminum product surface paint.
The invention also provides a method for removing the paint on the surface of the aluminum product, which comprises the steps of placing the aluminum product 10 to be paint removed on a moving platform 11 of a removing device of the paint on the surface of the aluminum product, and removing the aluminum product 10 to be paint removed by plasma jet 9 sprayed by a nozzle 8 of the removing device of the paint on the surface of the aluminum product; and cleaning the surface of the aluminum product subjected to the removal treatment to obtain the aluminum product subjected to paint removal.
Wherein the distance between the nozzle 8 and the surface of the aluminum material 10 to be paint-removed is 25-30 cm. Preferably, the distance is 28 to 30cm. By limiting the distance between the nozzle 8 and the surface of the aluminum material 10 to be paint removed, the situation that the active substances in the plasma jet 9 cannot fully contact with the surface of the aluminum material 10 to be paint removed and a thicker paint coating is still reserved on the surface after paint removal treatment can be avoided; or too closely spaced, the plasma jet 9 generates local instantaneous high temperature to cause thermal effect, so that combustion, gasification and melting are main reactions, and the residual paint layer on the surface after paint removal treatment is black and is difficult to separate from the aluminum alloy substrate.
Specifically, when the plasma generator 3 of the paint removing device for the surface of the aluminum material applies the plasma jet 9 to the surface of the aluminum material 10 to be paint removed, the removal of the paint coating is affected by two modes of action, one is the chemical action (such as oxidization) of the high-energy substance of the plasma jet 9 and the paint coating, and the other is the physical action between the pressure wave or shock wave generated in the plasma jet 9 and the non-reactive component, and the binding force of the non-reactive component and the surface of the aluminum material is lost or reduced. By this mode of action, both the reactive and non-reactive components can be decomposed or stripped simultaneously, constantly exposing new surfaces of the paint coating until the complete aluminum substrate is exposed. The reactive component is an organic substance, a polymer, or the like.
The invention bombards or activates the paint coating on the surface of the aluminum material 10 to be paint removed by utilizing plasmas (comprising electrons, ions, molecules and atomic groups) generated by breakdown of working gas, and can flexibly process the aluminum material with complex shapes and structures such as slits, holes and the like in atmospheric pressure by a non-contact treatment means, thereby obtaining the waste aluminum material (high-quality regenerated aluminum raw material) with high cleanliness and low loss rate, and further producing waste aluminum alloy regenerated products or secondary aluminum alloy ingots in the later stage of investment. Specifically, the atmospheric plasma generator 3 breaks down working gas to generate a non-transfer arc torch, high-energy substances are sprayed to the aluminum material 10 to be paint removed outside a certain distance along with the non-transfer arc torch from the nozzle 8, and the aluminum material 10 to be paint removed is moved according to a designed route, so that the activation of reactive substances of a surface paint layer and the bombardment of non-reactive substances are realized; and then cleaning the surface of the aluminum product after the removal treatment, and thoroughly separating loose non-reactive components remained on the surface of the aluminum product to obtain the aluminum product after paint removal, wherein the paint coating is thoroughly removed. The aluminum material after paint removal can be regenerated by using a conventional melting blending component regeneration process, and finally the efficient recycling of resources is realized.
According to the method for removing the paint on the aluminum surface, provided by the invention, the paint on the aluminum surface is removed at the position with the distance of 25-30 cm from the surface of the aluminum material 10 to be paint removed by a removing device (comprising a plasma generator) of the paint on the aluminum surface, and the paint coating on the aluminum surface is bombarded or activated by high-energy particles contained in plasma so as to realize rapid, efficient and green clean paint removal; and cleaning the surface of the aluminum product after the removal treatment to obtain the aluminum product after paint removal. The removal method can be used for efficiently removing paint on the surface of the aluminum material, and can also be used for removing paint on workpieces with complex shapes and structures such as slits, holes and the like; the surface of the aluminum product workpiece does not need to be dried after being bombarded by the plasmas, so that the working procedure is simplified, the cost is saved, and the subsequent process of regenerating and melting the aluminum scrap alloy is facilitated; the removing method belongs to non-contact paint removal, not only can remove dirt, but also can not cause damage and performance change of a matrix material; in addition, the method is an environment-friendly paint removing method, does not use chemical reagents, does not generate waste liquid and waste gas after paint removal, does not cause environmental pollution, and can also ensure the personal safety and health of operators.
Further, the working gas for the removal treatment is nitrogen. Specifically, the working gas is nitrogen, and the working gas pressure is atmospheric pressure. The plasma (including electrons, ions, molecules and atomic groups) generated by the breakdown of nitrogen can be utilized to bombard or activate the paint coating on the surface of the aluminum material 10 to be depainted, and a vacuum system is not required to maintain a low-pressure state.
Further, the flow rate of the working gas for the removal treatment is 0.5-1 m 3/h.
Further, the flow rate of the working gas in the arcing stage of the plasma generator is 0.8-1 m 3/h; the flow speed of the working gas in the plasma jet stabilization stage is 0.5-0.8 m 3/h. Specifically, the flow rate of nitrogen in the arcing stage of the plasma generator is 0.8-1 m 3/h; the flow rate of nitrogen in the plasma jet stabilization stage is 0.5-0.8 m 3/h, and stable arcing is realized by limiting the flow rate of nitrogen.
Further, the duration of the removal treatment is 15-20 s. Specifically, referring to fig. 1, when the external electric field power of the paint removal device on the surface of the aluminum material is stabilized at about 12kW for 10-15 s, the aluminum material 10 to be paint removed is placed under the plasma jet 9 for removal treatment for 15-20 s, and paint coatings with different thicknesses can be effectively removed by limiting the time of the paint removal treatment.
Further, the cleaning treatment mode comprises one or more of brushing, erasing and blowing removal of the surface of the aluminum product after the removal treatment. Specifically, loose non-reactive components remain on the surface of the aluminum material after the removal treatment. The non-reactive component is substantially separated from the aluminum substrate, and the surface of the aluminum material can be cleaned by a brush or a piece of rough cloth; further, a spray gun can be used for carrying out air blowing treatment on the surface of the aluminum material, so that the residual loose non-reactive components are thoroughly removed, and the subsequent practical application of the aluminum material is facilitated.
The invention also provides application of the removal method in any one of the above to the aluminum material 10 to be paint removed, wherein the paint coating thickness of the aluminum material 10 to be paint removed is 50-150 mu m.
The removal method is applied to the aluminum material to be paint removed, can treat waste aluminum and waste aluminum alloy materials or aluminum-containing waste materials in a large area, so as to provide high-quality regenerated aluminum raw materials for regeneration of the waste aluminum alloy, and has wide application prospect.
Further, the aluminum material 10 to be paint-removed includes a 6-series aluminum alloy profile. Specifically, the aluminum material to be paint-removed 10 mainly contains 6-series aluminum alloy profile common elements such as magnesium (Mg), silicon (Si), copper (Cu), manganese (Mn), iron (Fe), chromium (Cr), zinc (Zn), titanium (Ti) and the like, but does not contain paint coating common elements such as barium (Ba), calcium (Ca), sulfur (S) and the like, and the paint coating common elements are all enriched into residual loose non-reactive components in the form of inorganic phases such as barium sulfate (BaSO 4), calcium carbonate (CaCO 3) and the like.
For a further understanding of the present invention, an illustration is now given:
Example 1
The aluminum surface paint removing device adopts nitrogen as working gas of the plasma generator 3, the nitrogen is conveyed to the discharge chamber 6 through a gas conduit at a flow rate of 1m 3/h, and the power of an electric field for driving plasma after arcing is stabilized at about 12.4 kW. 6063-type broken-bridge aluminum alloy with the average thickness of the paint coating of 136.8 μm is placed on a moving platform 11 below an atmospheric plasma generator 3, and a nozzle 8 of the plasma generator 3 is 30cm away from the surface of the aluminum material 10 to be paint-removed. And (3) moving the aluminum material 10 to be paint removed, stabilizing the scanning speed of the plasma jet 9 at 0.01m/s, taking out the aluminum material after the plasma torch scans for 20s, measuring the instantaneous temperature of the surface of the aluminum material by using an infrared thermometer, and measuring the average thickness of an ash layer on the surface of the aluminum material by using a coating thickness meter.
And (3) cooling the surface temperature of the aluminum product after paint removal treatment to room temperature, and cleaning the non-reactive components with loose surfaces by using coarse cloth to obtain the aluminum product after final treatment. The treatment product in this pair of examples was designated d=30 cm.
Comparative example 1
Compared with the embodiment 1, the nozzle 8 is adjusted to be 37cm from 30cm of the surface of the aluminum material 10 to be paint removed (namely, the movable platform 11 is lowered by 7 cm), and other conditions are kept unchanged; the treated product in this comparative example was designated d=37 cm.
Comparative example 2
Compared with example 1, the nozzle 8 was adjusted to 15cm from 30cm of the surface of the aluminum material 10 to be paint-removed, and the other conditions were kept unchanged. The treated product in this comparative example was designated d=15 cm.
Comparative example 3
Compared with the embodiment 1, the method does not adopt a removing device for paint on the surface of the aluminum material, adopts common baking paint removing treatment, completely places the same aluminum material to be paint removed in an open temperature-controlled pit furnace, and takes out the aluminum material after the reaction for 15min at the constant temperature of 250 ℃.
And (3) cooling the surface temperature of the aluminum product after paint removal treatment to room temperature, and cleaning the non-reactive components with loose surfaces by using coarse cloth to obtain the aluminum product after final treatment. The treated product in this comparative example was designated as ordinary bake paint stripper.
Analytical example 1
1. FIGS. 2 are schematic views showing the surface of the aluminum materials before and after removing the residual loose nonreactive components on the surface of the aluminum materials in example 1 and comparative examples 1 to 3; wherein, FIG. 2 (a) -1 shows the aluminum product after the removal treatment by the aluminum product surface paint remover in example 1; FIGS. 2 (a) -2 are illustrations of the aluminum material after removal of the remaining loose non-reactive components on the surface of the aluminum material in example 1; FIG. 2 (b) -1 shows the aluminum material after the removal treatment by the aluminum material surface paint remover in comparative example 1; FIGS. 2 (b) -2 are the aluminum materials of comparative example 1 after removal of the remaining loose non-reactive components on the surface of the aluminum material; FIG. 2 (c) -1 shows the aluminum material after the removal treatment by the aluminum material surface paint remover in comparative example 2; FIGS. 2 (c) -2 are diagrams showing the aluminum material after removing the residual loose nonreactive components on the surface of the aluminum material in comparative example 2; FIG. 2 (d) -1 is an aluminum material after the conventional bake-stripping treatment in comparative example 3; FIGS. 2 (d) -2 are the aluminum materials of comparative example 3 after removing the residual loose nonreactive components on the surface of the aluminum material.
As can be seen from fig. 2: after bombardment by the plasma jet 9, the instantaneous temperature of the surface is lowest, which is different from the conventional baking paint removal and d=37 cm, d=30 cm, and the ash layer is yellow brown, and after removing the residual loose non-reactive components on the surface, only d=30 cm exposes the complete and clean aluminum alloy substrate.
TABLE 1 comparison of aluminum surfaces before and after removal of residual loose nonreactive components from aluminum surfaces in example 1 and comparative examples 1 to 3
2. XRD characterization of two different colored ember layers (Black ash, yellow ash) in examples 1 and 2 and 3 is shown in FIG. 3, and it can be seen that the control standard cards PDF#26-0191, PDF#07-0233, PDF#49-1433, PDF#05-0586, PDF#08-0427, PDF#06-0675: the diffraction peak positions of the two different color ember layers are basically consistent with the positions of the standard card diffraction peaks of the BaSO 4、BaO2、TiO2、CaCO3、MgCO3 and the C, which shows that the constituent materials of the ember layers in the example 1 are basically the same as those of the ember layers in the comparative example 2 and the comparative example 3, but the diffraction peak positions of the two different color ember layers are found by SEM (scanning electron microscope) map comparison of the yellow brown ember layers shown in figure 4 and the black gray ember layers shown in figure 5: the particles of the non-reactive components in the corresponding tan ember bed of d=30 cm (such as BaSO 4 monomer particles shown in fig. 4 (a), baSO 4、CaCO3 monomer particles shown in fig. 4 (b), baSO 4、CaCO3 -bound particles shown in fig. 4 (c)) have a particle size distribution of 1 to 25 μm, significantly smaller than the dark grey ember bed produced in comparative example 2, comparative example 3. Namely, the paint coating on the surface of the aluminum material is bombarded by adopting an atmospheric plasma torch (plasma jet 9) at a proper distance, so that organic components which have an adhesion effect between non-reactive components can be destroyed to a large extent in a short time, and meanwhile, shock waves are generated, so that the non-reactive components thoroughly fall off from the aluminum material matrix.
3. EDS spectroscopy analysis of the elements of the ember bed O, C, al in example 1 and comparative example 2, comparative example 3 can be seen in the following table: the content of C element in the ash bed remained on the surface of the example 1 is obviously smaller than that of the proportion 2 and the comparative example 3, which shows that the effect of bombarding the paint coating on the surface of the aluminum material by using an atmospheric plasma torch at a proper distance on activating reactive components (organic matters and polymers) in the coating is more obvious, and the C element in the carbon-containing organic matters is mostly separated from the surface of the aluminum material matrix in the form of CO 2.
TABLE 2 EDS Spectrometry for the elements O, C, al in the ember bed of example 1 and comparative example 2, comparative example 3
4. The paint removal products in the example 1 and the comparative examples 1 to 3 are respectively used as raw materials of a waste aluminum alloy regeneration process, and an A356 automotive aluminum alloy (the components are shown in the following table) is used as a target alloy to carry out a waste aluminum material melting regeneration test, wherein the specific test process is as follows:
TABLE 3 target alloy composition table
Taking a certain amount of aluminum material after paint removal, drying at 100 ℃ for 8 hours, adding the aluminum material into a graphite crucible at 750 ℃ which is preheated in advance, and placing the aluminum material into an aluminum alloy smelting furnace at 750 ℃ to be melted for 30 minutes at constant temperature. Adding a pure magnesium sheet and an aluminum-silicon intermediate alloy (20% Si) into the aluminum alloy liquid after the aluminum material is completely melted to adjust the components of the aluminum alloy liquid to the requirements of A356 type aluminum alloy for vehicles, stirring a high-purity graphite rod for 5min, standing at 720 ℃ for 45min, removing scum on the surface of the aluminum alloy liquid by adopting a 316 stainless steel Gao Wenlao slag ladle, directly casting the aluminum alloy liquid into a preheated graphite mould, and then quenching in room temperature water to obtain the regenerated A356 type aluminum alloy for vehicles;
referring to fig. 6, the test results are: d=30cm, d=15cm, and the tensile strength corresponding to the common baking paint removal is 282.37MPa, 272.61MPa and 270.40MPa respectively.
In summary, the above embodiments of the present invention are only preferred embodiments of the present invention, and therefore, the scope of the present invention is not limited by the above embodiments, and all equivalent structural changes made by the description and the accompanying drawings under the technical concept of the present invention, or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. The removing device for the paint on the surface of the aluminum material is characterized by comprising a plasma generator, a direct-current power supply, a gas cylinder and a mobile platform;
The plasma generator comprises a nozzle arranged at the lower part, a cathode and an anode which are arranged in the inner cavity, and the cathode and the anode are electrically connected with the direct current power supply;
The working power of the direct current power supply is 12-12.5 kW;
The gas cylinder is communicated with the inner cavity of the plasma generator;
The moving platform is positioned below the nozzle.
2. The removal apparatus as claimed in claim 1, wherein the anode is of unitary construction with the nozzle.
3. The method for removing the paint on the surface of the aluminum material is characterized by comprising the following steps of:
Placing the aluminum material to be paint removed on a moving platform of the aluminum material surface paint removing device according to claim 1 or 2, and removing the aluminum material to be paint removed by plasma jet flow sprayed from a nozzle of the aluminum material surface paint removing device;
cleaning the surface of the aluminum product subjected to the removal treatment to obtain a paint-removed aluminum product;
wherein the distance between the nozzle and the surface of the aluminum material to be paint removed is 25-30 cm.
4. A removal method according to claim 3, characterized in that the working gas of the removal treatment is nitrogen.
5. A removal method according to claim 3, characterized in that the working gas flow rate of the removal treatment is 0.5-1 m 3/h.
6. The removal method according to claim 5, wherein the flow rate of the working gas in the arcing phase of the plasma generator is 0.8-1 m 3/h; the flow speed of the working gas in the plasma jet stabilization stage is 0.5-0.8 m 3/h.
7. A removal method according to claim 3, characterized in that the duration of the removal treatment is 15-20 s.
8. A removal method as set forth in claim 3, wherein the cleaning treatment includes one or more of brushing, wiping, and blowing the surface of the aluminum material after the removal treatment.
9. Use of the stripping method as claimed in any of claims 3 to 8 in aluminum materials to be stripped, characterized in that the paint coating thickness of the aluminum materials to be stripped is 50 to 150 μm.
10. The use according to claim 9, characterized in that the aluminum material to be paint stripped comprises a 6-series aluminum alloy profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410470849.9A CN118204316A (en) | 2024-04-18 | 2024-04-18 | Device and method for removing paint on surface of aluminum material and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410470849.9A CN118204316A (en) | 2024-04-18 | 2024-04-18 | Device and method for removing paint on surface of aluminum material and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118204316A true CN118204316A (en) | 2024-06-18 |
Family
ID=91452237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410470849.9A Pending CN118204316A (en) | 2024-04-18 | 2024-04-18 | Device and method for removing paint on surface of aluminum material and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118204316A (en) |
-
2024
- 2024-04-18 CN CN202410470849.9A patent/CN118204316A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Saravanakumar et al. | Plasma assisted synthesis of γ-alumina from waste aluminium dross | |
| EP2687613B1 (en) | Method for recovering valuable metals | |
| WO2012111690A1 (en) | Valuable metal recovery method | |
| KR101501864B1 (en) | Valuable metal recovery method | |
| EP2703504B1 (en) | Method for recovering valuable metal | |
| KR960003815A (en) | How to Dispose of Metal Waste | |
| CN109368952B (en) | Harmless cooperative treatment method for heavy metal sludge and organic silicon waste | |
| JPH09287033A (en) | Treatment of waste containing oxide and method therefor | |
| JP5109144B2 (en) | Solvent and its production method and method for steel production | |
| WO2004029332A3 (en) | Purification of electrochemically deoxidised refractory metal particles by heat processing | |
| CN118204316A (en) | Device and method for removing paint on surface of aluminum material and application | |
| CN101591487A (en) | A kind of surface paint removal and stripping treatment agent for waste pop can | |
| KR101027218B1 (en) | Method for Recovering Metal Zinc from Material Containing Zinc | |
| CN1147021A (en) | Method and apparatus of treating dusts containing oxides | |
| EP2940155B1 (en) | Apparatus and method for processing molten iron | |
| Boom et al. | Recycling of scrap for high quality steel products | |
| CA3099835A1 (en) | A method for the manufacture of reduced graphene oxide from electrode graphite scrap | |
| CN113265536B (en) | Method for recycling ferrosilicon metallurgy byproducts | |
| RU2144096C1 (en) | Method of treatment of surfaces of articles by arc discharge in vacuum | |
| CN111411277A (en) | Method for improving oxidation resistance of magnesium and magnesium-calcium alloy | |
| CN1696350A (en) | Method for removing coat layer on surface of coated hard alloy | |
| CN118166233A (en) | Grain refiner for regenerated aluminum alloy, preparation method and application thereof | |
| JP2005248196A (en) | Method for recovering useful metal from residue or sludge containing metal powder particle | |
| JP2001020018A (en) | Method for regenerating magnesium base waste material | |
| CN107470578B (en) | A kind of centrifuge annular cast and its preparation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |