WO1995019454A1 - Procede de recyclage de produits en alliage d'aluminium pour automobiles - Google Patents

Procede de recyclage de produits en alliage d'aluminium pour automobiles Download PDF

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Publication number
WO1995019454A1
WO1995019454A1 PCT/JP1995/000036 JP9500036W WO9519454A1 WO 1995019454 A1 WO1995019454 A1 WO 1995019454A1 JP 9500036 W JP9500036 W JP 9500036W WO 9519454 A1 WO9519454 A1 WO 9519454A1
Authority
WO
WIPO (PCT)
Prior art keywords
aluminum alloy
automobiles
paint
products
recycling
Prior art date
Application number
PCT/JP1995/000036
Other languages
English (en)
Japanese (ja)
Inventor
Kunihiro Yasunaga
Noboru Hayashi
Kenji Oosumi
Original Assignee
Honda Giken Kogyo Kabushiki Kaisha
Kabushiki Kaisha Kobe Seiko Sho
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Giken Kogyo Kabushiki Kaisha, Kabushiki Kaisha Kobe Seiko Sho filed Critical Honda Giken Kogyo Kabushiki Kaisha
Publication of WO1995019454A1 publication Critical patent/WO1995019454A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/0007—Preliminary treatment of ores or scrap or any other metal source
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
    • B44D3/166—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning by heating, e.g. by burning
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/0084—Obtaining aluminium melting and handling molten aluminium
    • C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
    • 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
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a method for recycling aluminum alloy product waste for automobiles.
  • Aluminum alloys are excellent in light weight, fashionability, workability, etc., and are widely used in the fields of transportation, construction, and food. Of these, in the transportation field, automobiles are becoming lighter in terms of resource and energy savings. In other words, parts and bodies used in automobiles are made of aluminum alloy, which is lighter than conventional iron-based materials.
  • the engine and other parts are already using aluminum alloy (aluminized), and the subject of aluminum is car bodies (outer panels, skeletons, etc.).
  • Aluminum alloys used for these bodies are generally painted to improve aesthetics and corrosion resistance.
  • a method is generally used in which a base treatment is applied to the surface of an aluminum alloy plate and a paint is applied thereon.
  • Aluminum alloy products have a higher scrap value compared to iron products, and have the ability to be recycled from the viewpoint of resource and energy savings and to return to high value-added applications, such as the original aluminum alloy products for automobiles. desirable.
  • aluminum alloy products that are currently frequently used include aluminum alloy beverage cans that are similar to aluminum alloy products for automobiles and have similar issues in recycling.
  • the similarities between the aluminum alloy body and the aluminum alloy beverage can are at least the following items.
  • Aluminum alloy is pre-treated and painted with paint.
  • the surface material and backing material of the bonnet, and the end material and the body material of the aluminum alloy beverage can are generally dissimilar metals or dissimilar alloys, and there are restrictions on the target varieties and products after recycling. .
  • the differences between the aluminum alloy body and the aluminum alloy beverage can include at least the following items.
  • the coating of aluminum alloy products for automobiles is about 3 to 5 times as thick as that of aluminum alloy beverage cans. ing.
  • the ratio of the paint weight is about 2-3% for aluminum alloy drink cans and about 10% for automobile bodies, for example, bonnets, based on the weight of aluminum alloy. .
  • Aluminum series (hereinafter abbreviated to aluminum alloy) and JIS 5000 series are mainly used, but aluminum alloy beverage cans are composed of JIS 300 series and JIS 5000 series. Have been.
  • Additives such as pigments contained in paints are mixed into the molten metal, increasing the concentration of impurity elements in the molten metal, resulting in defective components of the molten metal.
  • the main thing is a component failure due to T 1 mixed by T i 0 2 in the pigment.
  • paint Alcoa and others.
  • pigments for example T i 0 2, etc.
  • This tendency is the same for aluminum alloys for automobiles.
  • This method uses a solution mainly composed of methylene chloride to remove the paint film by a swelling and peeling method.
  • this method is directly used for an aluminum alloy for automobiles having a thick paint film, its effect is not sufficient as described later in detail.
  • the present invention employs the following configuration.
  • the present invention after at least paint is removed from the aluminum alloy product scraps for automobiles, it is used as a part or whole of the molten raw material and melted in the air, and is returned to the aluminum alloy products for automobiles using part or all of the molten metal That's how it was done.
  • the following method is preferably used as a method for removing paint and preventing iron from being mixed.
  • the paint is removed by a combination of roasting and mechanical removal.
  • the JIS 6000 series alloy bonnet material can be recycled into the JIS 6000 series alloy.
  • Pb 200 ppm to 50 ppm
  • Sn about 20 ppm
  • Zn about 420 ppm were detected.
  • Pb and Sn forces, 'The reason that they were detected was because they were included in the paint, and because Pb and Sn had no solid solubility limit in the aluminum alloy, they existed independently and were rolled. If heated above the melting point in the process, etc., it melts, causing a decrease in strength and causing processing defects (cracks, etc.). For this reason, usually, Pb should be less than 50 ppm, preferably less than 10 ppm.
  • Manako S n should be less than 15 ppm, preferably less than 10 ppm.
  • Zn is usually set to 200 ppm or less, preferably 100 ppm or less.
  • the analysis of the molten metal there is no problem with the automotive material according to the analysis of the molten metal due to the presence of Ti in the aluminum alloy beverage can.
  • the painted bonnet emits black smoke when melted, which is not desirable in terms of work environment.
  • a greater amount of paint coexists and burns than aluminum alloy beverage cans, so countermeasures are needed.
  • the dissolution yield is about 85%, which can be improved.
  • the bonnet material of the same type and shape used as a comparison material had a good melting yield of about 97%, which was no paint. That power, 'is presumed to be affecting.
  • the above bonnet material was heated and held at 300 to 400 ° C., and was roasted.
  • this material was used as a raw material and dissolved, the paint was thermally decomposed in advance by roasting.
  • the amount of exhaust gas was extremely low, and the problem in the working environment was resolved.
  • the melting yield was improved to be comparable to the untreated aluminum alloy plate.
  • the amounts of Pb, Sn, and Zn during dissolution were almost the same as those without removing the paint. This is because the oxides such as PbO contained in the paint or the zinc phosphate treated film are burned as they are by the combustion of the paint and the polymer component which is the base material in the phosphorous acid treated film.
  • a bonnet material is used, and a paint mainly containing methylene chloride (a swelling peeling solution shown in Example 2 described later) is used to swell and peel the paint. Tested to remove.
  • the removal rate of paint was significantly slower for ponnet materials for aluminum alloy products for automobiles.
  • Fig. 1 shows an example of this.
  • the cause is considered as follows. In other words, the principle of the swelling and peeling method is to allow the solution to penetrate from the paint surface, expand the paint film, and remove the paint from the base material by the deformation force at this time.
  • zinc phosphate treatment is more preferable than chromate treatment for the base treatment prior to painting.
  • the zinc phosphate treatment is more effective for the swelling and peeling of the paint as a base treatment. Extremely easy.
  • FIG. 1 is a graph for comparing paint removal behavior due to swelling separation between an aluminum alloy can and an aluminum alloy material for automobiles.
  • FIG. 2 is a graph for comparing the effect of surface treatment of an aluminum alloy plate on paint removal by swelling and peeling.
  • FIG. 3 is a graph for comparing the effect of the undercoating treatment on paint removal by swelling and peeling.
  • FIG. 4 is a graph showing the effect of raw material size on paint removal by swelling and peeling.
  • Fig. 5 is a graph for comparing iron contamination from iron port immersed in molten aluminum alloy.
  • Raw material Aluminum alloy JIS 600 series, plate thickness l mm, dimensions 30 mm square, weight 1 t 0 n
  • Raw material pretreatment (paint removal): roasting method Heating rate 10 o'cz min
  • Raw material Aluminum alloy JIS 5000 series, other conditions are the same as (1) above.
  • the results of the investigation are shown in Table 2, and the results of the combination of roasting and mechanical method It was found that all aspects of melting yield and exhaust gas generation were excellent.
  • Raw material Aluminum alloy JIS 6000 series (50 ° /.) + JIS 5000 series (50%), other conditions are the same as (1) above. As shown in Table 3, the results of the investigation show that the combination of roasting and mechanical methods is superior in all aspects, including the amount of impurity elements mixed, the melting yield, and the state of exhaust gas generation.
  • Raw material aluminum alloy JIS 6000 series, thickness: 1 mm, dimensions: 300 thigh, weight 10 t 0 n
  • composition of swelling stripper methylene chloride 82 ° / 0
  • Raw material Aluminum alloy JIS 6000 series (50%) + JIS 5000 series (50%), and other conditions are the same as above (4). If swelling / peeling treatment is applied, the amount of impurities It turned out to be excellent in all aspects of exhaust gas generation.
  • Raw material Aluminum alloy JIS 500 series, other conditions are the same as (4) above. As shown in Table 6, the results of the survey showed that the swelling and peeling treatment was superior in all respects in the amount of impurities mixed, the dissolution yield, and the state of exhaust gas generation as compared to the case without treatment. .
  • Raw material pretreatment (paint removal): roasting method: heating rate 10 O'CZ min
  • Automotive aluminum alloy products can be recycled into the original automotive aluminum alloy products.
  • the method for recycling aluminum alloy product scraps for automobiles of the present invention by subjecting the aluminum alloy product scraps for automobiles to predetermined treatment, the aluminum alloy product for automobiles and other aluminum alloy products can be recycled. It is possible.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Body Structure For Vehicles (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Afin de recycler des produits en alliage d'aluminium pour automobiles, notamment en alliage d'aluminium traité en surface pour carrosseries d'automobiles, on utilise des ferrailles de produits en alliage d'aluminium, comme partie constituante du matériau de fusion ou comme matériau global de fusion, du moins après que la peinture qui les recouvre en ait été enlevée. Après fusion, une partie du matériau en fusion est recyclée pour former des produits en alliage d'aluminium pour automobiles. Pour enlever la peinture, on procède d'abord par calcination, puis on soumet la peinture à une opération de gonflement pour l'enlever de manière mécanique ou à l'aide d'un solvant contenant essentiellement du chlorure de méthylène. En outre, pour rendre les opérations de gonflement et d'enlèvement de la peinture plus aisées, les surfaces métalliques des produits en alliage d'aluminium sont traités par grenaillage, finissage terne, finissage à la meule et finissage à l'émeri, pour conférer une contrainte résiduelle aux produits, et le substrat est ensuite soumis à un traitement.
PCT/JP1995/000036 1994-01-17 1995-01-17 Procede de recyclage de produits en alliage d'aluminium pour automobiles WO1995019454A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6/3179 1994-01-17
JP317994A JP3568568B2 (ja) 1994-01-17 1994-01-17 自動車用アルミニウム合金製品屑のリサイクル法

Publications (1)

Publication Number Publication Date
WO1995019454A1 true WO1995019454A1 (fr) 1995-07-20

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PCT/JP1995/000036 WO1995019454A1 (fr) 1994-01-17 1995-01-17 Procede de recyclage de produits en alliage d'aluminium pour automobiles

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JP (1) JP3568568B2 (fr)
WO (1) WO1995019454A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005023429A1 (fr) * 2003-09-09 2005-03-17 House Of Metals Company Limited Procede de recyclage de roues en alliage d'aluminium
US10845279B1 (en) 2019-06-04 2020-11-24 House Of Metals Company Limited Method and system for determining waste metal batch composition taking into account differences in surface and interior composition
US11332807B2 (en) 2019-07-09 2022-05-17 House Of Metals Company Limited Method and system for estimating waste metal batch composition
US11761056B2 (en) 2020-06-17 2023-09-19 House Of Metals Company Limited Systems and methods for recycling waste metal pieces using shot blasting and shot removal

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003277837A (ja) * 2002-03-22 2003-10-02 Sumitomo Light Metal Ind Ltd 自動車用アルミニウム展伸材のリサイクル方法及びプラント
JP4317352B2 (ja) * 2002-10-11 2009-08-19 株式会社神戸製鋼所 自動車ルーフ取り付け構造
JP2004130985A (ja) * 2002-10-11 2004-04-30 Kobe Steel Ltd 自動車ルーフ取り付け構造
JP4852737B2 (ja) * 2004-09-27 2012-01-11 国立大学法人 千葉大学 リサイクル型Ｆｅ−Ａｌ複合材料の製造方法
JP4548105B2 (ja) * 2004-12-08 2010-09-22 東洋製罐株式会社 樹脂被覆金属成形体からの樹脂被覆除去方法及び該方法により得られるチタン成形体
JP5250238B2 (ja) * 2007-10-26 2013-07-31 アサヒセイレン株式会社 アルミニウム・スクラップの精製方法及びその精製装置
JP6786689B1 (ja) * 2019-10-10 2020-11-18 東京ステーション開発株式会社 アルミニウム製鉄道車両のリサイクル方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58126990A (ja) * 1982-01-22 1983-07-28 Toyota Motor Corp 鉄鋼の耐食性向上処理方法
JPS6227139B2 (fr) * 1983-05-26 1987-06-12 Alcan Int Ltd
JPS62142787A (ja) * 1985-10-21 1987-06-26 ト−カド・リミテツド 亜鉛めつきまたはカドミウムめつきした金属物品の耐蝕性を改善する方法
JPS63103081A (ja) * 1986-10-20 1988-05-07 Sumitomo Electric Ind Ltd 焼結部品の表面処理方法
JPH02160473A (ja) * 1988-12-07 1990-06-20 Fukuoka Alum Kogyo Kk アルミニウム屑の塗料除去方法
JPH036348A (ja) * 1989-06-03 1991-01-11 Kobe Steel Ltd 化成処理性に優れた自動車パネル用アルミニウム合金及びその製造方法
JPH03290475A (ja) * 1990-04-09 1991-12-20 Kobe Steel Ltd アルミニウム合金缶の塗料除去処理液
JPH0432577A (ja) * 1990-05-25 1992-02-04 Kobe Steel Ltd 塗膜密着性及び耐食性に優れた塗装ＡｌまたはＡｌ合金材
JPH05279762A (ja) * 1992-03-31 1993-10-26 Topy Ind Ltd 回収アルミ製品の溶融精製法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58126990A (ja) * 1982-01-22 1983-07-28 Toyota Motor Corp 鉄鋼の耐食性向上処理方法
JPS6227139B2 (fr) * 1983-05-26 1987-06-12 Alcan Int Ltd
JPS62142787A (ja) * 1985-10-21 1987-06-26 ト−カド・リミテツド 亜鉛めつきまたはカドミウムめつきした金属物品の耐蝕性を改善する方法
JPS63103081A (ja) * 1986-10-20 1988-05-07 Sumitomo Electric Ind Ltd 焼結部品の表面処理方法
JPH02160473A (ja) * 1988-12-07 1990-06-20 Fukuoka Alum Kogyo Kk アルミニウム屑の塗料除去方法
JPH036348A (ja) * 1989-06-03 1991-01-11 Kobe Steel Ltd 化成処理性に優れた自動車パネル用アルミニウム合金及びその製造方法
JPH03290475A (ja) * 1990-04-09 1991-12-20 Kobe Steel Ltd アルミニウム合金缶の塗料除去処理液
JPH0432577A (ja) * 1990-05-25 1992-02-04 Kobe Steel Ltd 塗膜密着性及び耐食性に優れた塗装ＡｌまたはＡｌ合金材
JPH05279762A (ja) * 1992-03-31 1993-10-26 Topy Ind Ltd 回収アルミ製品の溶融精製法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005023429A1 (fr) * 2003-09-09 2005-03-17 House Of Metals Company Limited Procede de recyclage de roues en alliage d'aluminium
US6983901B2 (en) * 2003-09-09 2006-01-10 House Of Metals Company Limited Method for recycling aluminum alloy wheels
US10845279B1 (en) 2019-06-04 2020-11-24 House Of Metals Company Limited Method and system for determining waste metal batch composition taking into account differences in surface and interior composition
US11262280B2 (en) 2019-06-04 2022-03-01 House Of Metals Company Limited Method and system for determining waste metal batch composition taking into account differences in surface and interior composition
US11332807B2 (en) 2019-07-09 2022-05-17 House Of Metals Company Limited Method and system for estimating waste metal batch composition
US11795523B2 (en) 2019-07-09 2023-10-24 House Of Metals Company Limited Method and system for improving waste metal batch composition
US11761056B2 (en) 2020-06-17 2023-09-19 House Of Metals Company Limited Systems and methods for recycling waste metal pieces using shot blasting and shot removal

Also Published As

Publication number Publication date
JPH07207354A (ja) 1995-08-08
JP3568568B2 (ja) 2004-09-22

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