JP2717326B2 - Method and apparatus for removing adhered metal from metal-attached steel sheet - Google Patents
Method and apparatus for removing adhered metal from metal-attached steel sheetInfo
- Publication number
- JP2717326B2 JP2717326B2 JP14663691A JP14663691A JP2717326B2 JP 2717326 B2 JP2717326 B2 JP 2717326B2 JP 14663691 A JP14663691 A JP 14663691A JP 14663691 A JP14663691 A JP 14663691A JP 2717326 B2 JP2717326 B2 JP 2717326B2
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- Japan
- Prior art keywords
- chamber
- metal
- heating
- steel sheet
- article
- Prior art date
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Classifications
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- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- ing And Chemical Polishing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属付着鋼板から付着金
属を除去する方法および装置に関し、たとえば亜鉛メッ
キ鋼板から亜鉛を除去する場合等に利用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing adhered metal from a metal-coated steel sheet, and is used, for example, when removing zinc from a galvanized steel sheet.
【０００２】[0002]
【従来の技術】自動車用亜鉛メッキ鋼板のスクラップ
材、プレス屑等を製鋼材料として再利用する場合、酸化
亜鉛等が溶解炉寿命を短かくするので、メッキされてい
る亜鉛を鋼から除去しなければならない。鋼から亜鉛を
除去する方法として、自動車用鋼板の例ではないが、特
公昭６１−２３８５８号公報には、加熱炉中において、
減圧下で、被処理物を加熱し、表面の亜鉛を蒸発させ、
蒸発された亜鉛をコレクタに付着させ回収する方法が開
示されている。2. Description of the Related Art When scrap materials and press waste of galvanized steel sheets for automobiles are reused as steelmaking materials, zinc oxide and the like shorten the life of a melting furnace. Must. As a method for removing zinc from steel, although not an example of a steel plate for automobiles, Japanese Patent Publication No. 23858/1986 discloses that in a heating furnace,
Heat the object under reduced pressure to evaporate the zinc on the surface,
A method for depositing and recovering evaporated zinc on a collector is disclosed.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記従来方法
を自動車用亜鉛メッキ鋼板のスクラップ材の亜鉛除去に
適用しても高効率の亜鉛除去は得られない。これは、カ
ーシュレッダからのスクラップ材には、機械油、プレス
油が付着するとともに、樹脂等の不純物が含まれてお
り、亜鉛回収加熱時にこれら有機材が蒸発して亜鉛と反
応し、ＺｎＣｌ2 、ＺｎＳ、ＺｎＳＯ4 などの難蒸発性
化合物層を表面に形成し、これが亜鉛（Ｚｎ）の蒸発を
妨げるからであると考えられる。However, even if the above-mentioned conventional method is applied to zinc removal from scrap materials of galvanized steel sheets for automobiles, highly efficient zinc removal cannot be obtained. This is because the scrap material from the car shredder adheres to the machine oil and press oil and contains impurities such as resin. At the time of zinc recovery and heating, these organic materials evaporate and react with zinc, and ZnCl 2 , ZnS, ZnSO 4, etc., are formed on the surface, which prevents the evaporation of zinc (Zn).
【０００４】本発明の目的は、有機材付着の有無にかか
わらず、金属付着鋼板から、高効率で付着金属を除去で
きる方法を提供することにある。[0004] It is an object of the present invention to provide a method capable of efficiently removing adhered metal from a metal-attached steel sheet regardless of whether or not an organic material is adhered.
【０００５】[0005]
【課題を解決するための手段】上記目的は、本発明によ
れば、次の金属付着鋼板の付着金属除去方法および装置
によって達成される。 （１）金属付着鋼板からなる被処理品を減圧下で２００
〜５００℃に加熱して被処理品の表面に付着している有
機材を蒸発させ捕捉する工程と、付着した有機材が除去
された被処理品を減圧下で５００〜９５０℃に加熱して
鋼板に付着している金属を蒸発させ回収する工程と、か
ら成る金属付着鋼板の付着金属除去方法。 （２） 金属付着鋼板からなる被処理品を減圧下でない
条件下で予熱する工程と、予熱された被処理品を前処理
室内にて減圧下で２００〜５００°Ｃに加熱して前記被
処理品に付着している有機材を蒸発させ捕捉する工程
と、有機材が蒸発除去された被処理品を前記前処理室か
ら中間室を介して処理室へと搬送する工程と、前記処理
室に搬送された被処理品を前記処理室内で減圧下で５０
０〜９５０°Ｃに加熱して鋼板に付着している金属を蒸
発させ回収させる工程と、付着金属が蒸発除去された鋼
板を冷却室で冷却する工程と、から成る金属付着鋼板の
付着金属除去方法。 （３） 減圧可能で、金属付着鋼板からなる被処理品を
２００〜５００°Ｃに加熱可能な加熱手段を有する前処
理室と、前記前処理室より後段に配され、減圧可能で、
前記被処理品を５００〜９５０°Ｃに加熱可能な加熱手
段を有する処理室と、を備えた金属付着鋼板の付着金属
除去装置。 （４） 前記前処理室と前記処理室との間に中間室を備
えている（３）記載の金属付着鋼板の付着金属除去装
置。 （５） 前記前処理室の前段に減圧下でない条件下で被
処理品を予熱する予熱手段を備えている（３）記載の金
属付着鋼板の付着金属除去装置。According to the present invention, the above object is attained by the following method and apparatus for removing adhered metal from a metal-coated steel sheet. (1) An object to be processed consisting of a metal-attached steel plate is reduced under reduced pressure for 200 hours.
A step of evaporating and capturing the organic material adhering to the surface of the article to be treated by heating to about 500 ° C., and heating the article to be treated with the removed organic material under reduced pressure to 500 to 950 ° C. Evaporating and recovering the metal adhering to the steel sheet. (2) a step of preheating the article to be treated made of a metal-attached steel sheet under a condition not under reduced pressure, and heating the preheated article to 200 to 500 ° C. under reduced pressure in a pretreatment chamber; Evaporating and capturing the organic material adhering to the product; transporting the processed material from which the organic material has been removed by evaporation to the processing chamber via the intermediate chamber; and The conveyed articles are reduced in the processing chamber under reduced pressure by 50
A step of heating to 0 to 950 ° C. to evaporate and collect the metal adhering to the steel sheet; and a step of cooling the steel sheet from which the adhering metal has been removed in a cooling chamber, to remove the adhering metal from the metal-adhered steel sheet. Method. (3) a pretreatment chamber having heating means capable of heating the workpiece to be formed of a metal-adhered steel sheet to 200 to 500 ° C. which can be depressurized, and a pretreatment chamber disposed downstream of the pretreatment chamber and capable of decompression;
A treatment chamber having a heating means capable of heating the article to be processed to 500 to 950 ° C .; (4) The apparatus for removing adhered metal from a metal-attached steel sheet according to (3), further comprising an intermediate chamber between the pretreatment chamber and the treatment chamber. (5) The apparatus for removing adhered metal from a metal-attached steel sheet according to (3), further comprising a preheating means for preheating the article to be processed under a condition not under reduced pressure, in a stage preceding the pretreatment chamber.
【０００６】[0006]
【作用】上記（１）の方法では、亜鉛蒸発温度以下で、
被処理品を加熱して有機材を蒸発させるので、有機材が
亜鉛加熱回収時に亜鉛と反応して化合物を形成すること
が防止される。このため、亜鉛加熱回収時に亜鉛の蒸発
が円滑に行われ、高効率で亜鉛を除去することが可能に
なる。上記（２）の方法では、前処理室での減圧下での
加熱工程の前に、減圧下でない条件下で予熱する工程を
設けたので、前処理室での加熱が対流熱伝達を有効に利
用できないため時間がかかるところを、予熱工程で対流
熱伝達も有効に利用して予熱するため、２００〜５００
°Ｃに被処理品を昇温する時間を短縮できる。また、被
処理品を前処理室から処理室に中間室を介して搬送する
ので、処理室と中間室との間の扉が開いたときには前処
理室と中間室との間の扉が閉じるようにしておくことに
より、処理室と前処理室とが直接連通することがないよ
うにできる。したがって、処理室で蒸発した付着金属、
たとえば亜鉛が前処理室に移行して処理室内の被処理品
より低温の前処理室内の被処理品に凝着することが防止
される。上記（３）の装置では、前処理室と処理室とを
設けたので、前処理室で有機材を除去した後に、処理室
で付着金属を蒸発除去でき、除去効率が向上する。上記
（４）の装置では、中間室が設けられているので、処理
室と前処理室とが直接連通することが防止され、処理室
で蒸発された付着金属が前処理室のより低温の被処理品
に再付着することが防止される。また、中間室を設けた
ことにより、バッチ処理によらず、被処理品を連続処理
できるようになる。上記（５）の装置では、前処理室の
前段に予熱手段が設けられているので、被処理品は対流
熱伝達で効果的に２００〜５００°Ｃ近傍まで昇温され
る。したがって、前処理室だけで２００〜５００°Ｃに
昇温する場合に比べて昇温時間が大幅に短縮される。According to the above method (1), when the temperature is equal to or lower than the zinc evaporation temperature,
Since the processed material is heated to evaporate the organic material, the organic material is prevented from reacting with zinc to form a compound at the time of recovery by heating with zinc. For this reason, at the time of zinc heating recovery, zinc is smoothly evaporated, and zinc can be removed with high efficiency. In the above method (2), a step of preheating under non-reduced pressure conditions is provided before the heating step under reduced pressure in the pretreatment chamber, so that heating in the pretreatment chamber effectively improves convective heat transfer. Since it is not possible to use it and it takes time, the convection heat transfer is effectively used in the preheating step to perform preheating.
The time for raising the temperature of the article to be processed to ° C can be shortened. Further, since the article to be processed is transferred from the pre-processing chamber to the processing chamber via the intermediate chamber, when the door between the processing chamber and the intermediate chamber is opened, the door between the pre-processing chamber and the intermediate chamber is closed. By doing so, the processing chamber and the pre-processing chamber can be prevented from directly communicating with each other. Therefore, the deposited metal evaporated in the processing chamber,
For example, it is prevented that zinc moves to the pre-treatment chamber and adheres to the article to be processed in the pre-processing chamber at a lower temperature than the article to be processed in the processing chamber. In the apparatus of the above (3), since the pretreatment chamber and the treatment chamber are provided, after removing the organic material in the pretreatment chamber, the adhered metal can be removed by evaporation in the treatment chamber, and the removal efficiency is improved. In the apparatus of the above (4), since the intermediate chamber is provided, the processing chamber and the preprocessing chamber are prevented from directly communicating with each other, and the adhered metal evaporated in the processing chamber is cooled at a lower temperature in the preprocessing chamber. Redeposition on the processed product is prevented. In addition, the provision of the intermediate chamber enables continuous processing of the article to be processed irrespective of batch processing. In the apparatus of the above (5), since the preheating means is provided in the preceding stage of the pretreatment chamber, the temperature of the article to be treated is effectively raised to around 200 to 500 ° C. by convective heat transfer. Therefore, the temperature raising time is significantly reduced as compared with the case where the temperature is raised to 200 to 500 ° C. only in the pretreatment chamber.
【０００７】なお、処理室での処理を減圧下としたの
は、大気中で７００℃以上に加熱しても、ＺｎはＺｎＯ
になり酸化物として鉄板に固着するだけだからである。
また、大気中で１０００℃まで加熱を行った場合、Ｚｎ
は蒸発しないで、鋼板に浸入拡散し、鋼板自体の酸化が
発生する。そのため、本発明では処理中のＯ2 濃度をさ
げるために減圧し脱Ｚｎ処理を行う。また、温度に関し
ては、Ｚｎの蒸気圧は約２５０°Ｃ時に１０-4ｍｍＨｇ
であり、Ｚｎの融点が４１９℃であるため、基本的には
２５０℃以上であれば減圧下での脱Ｚｎ処理は可能であ
ると考えられる。しかし、脱Ｚｎの効率を考えると４０
０℃以上であることが望ましい。最高温度に関しては、
最高１１００℃まであれば実用上問題ないレベルであ
り、１１００℃以上の温度域の処理については、処理時
間当りの電力費がかかるばかりで、コスト的なメリット
は得られない。また、他の条件も考慮して、温度範囲を
５００℃−９５０℃とした。５００℃は有機材除去のた
めの温度範囲２００−５００℃と干渉しないためであ
り、９５０℃は、それ以上にしても９５０℃の時と除去
効率がほとんど向上しないのでランニングコストを低く
するためである。The reason why the processing in the processing chamber is performed under reduced pressure is that Zn is treated with ZnO even if it is heated to 700 ° C. or more in the atmosphere.
This is because they only become oxides and adhere to the iron plate.
When heating to 1000 ° C. in the atmosphere, Zn
Does not evaporate but penetrates and diffuses into the steel sheet, causing oxidation of the steel sheet itself. Therefore, in the present invention, the pressure is reduced and the Zn removal treatment is performed to reduce the O 2 concentration during the treatment. Regarding the temperature, the vapor pressure of Zn was 10 −4 mmHg at about 250 ° C.
Since the melting point of Zn is 419 ° C., it is considered that removal of Zn under reduced pressure is basically possible at 250 ° C. or higher. However, considering the efficiency of Zn removal, 40
It is desirable that the temperature is 0 ° C. or higher. Regarding the maximum temperature,
If the maximum temperature is 1100 ° C., there is no problem in practical use. In the processing in the temperature range of 1100 ° C. or more, only the power cost per processing time is required, and no cost advantage can be obtained. The temperature range was set at 500 ° C. to 950 ° C. in consideration of other conditions. The reason is that 500 ° C. does not interfere with the temperature range of 200 to 500 ° C. for removing organic materials, and 950 ° C. does not improve the removal efficiency at 950 ° C. even if it is higher than 950 ° C., so that the running cost is reduced. is there.
【０００８】[0008]
【実施例】図１は本発明の方法を実施するための装置の
一例を示している。図１に示すように、予熱手段（図示
例では加熱室）２、前処理室４、中間室６、処理室８、
冷却手段１０が順に配設されている。予熱手段２は、金
属付着鋼板（以下、亜鉛メッキ鋼板を例にとる。亜鉛メ
ッキ鋼板では付着金属は亜鉛である。）から成る被処理
品を減圧下でない条件下で予熱する手段からなる。予熱
手段２は、たとえばエネルギ節約のために冷却室１０か
ら送られてくるガスで予熱するために、非酸化性ガス、
たとえばＡｒガスが充満した室から成ってもよく、ある
いは設備費を小とするために大気中での加熱であっても
よい。前処理室４は、被処理品の表面に付着した油や被
処理品に含まれているかもしれない樹脂等の、有機材を
減圧下で加熱して蒸発せしめて捕捉するための室であ
る。前処理室４は、被処理品を加熱するための加熱手段
が設けられた密閉室（したがって、前後に扉がある。）
から成る。前処理室４には、有機材が酸化しないように
酸素のない雰囲気とするための、かつ比較的低い温度で
有機材が蒸発することを可能にするための、減圧ポンプ
１２が接続されており、その接続配管途中に、蒸発され
た有機材の蒸気を捕捉するフィルタ１４が設けられてい
る。FIG. 1 shows an example of an apparatus for carrying out the method of the present invention. As shown in FIG. 1, preheating means (heating chamber in the illustrated example) 2, pretreatment chamber 4, intermediate chamber 6, processing chamber 8,
Cooling means 10 are arranged in order. The preheating means 2 is a means for preheating an article to be treated made of a metal-coated steel sheet (hereinafter, a galvanized steel sheet is taken as an example; in the case of a galvanized steel sheet, the deposited metal is zinc). The preheating means 2 includes, for example, a non-oxidizing gas for preheating with a gas sent from the cooling chamber 10 to save energy.
For example, it may be composed of a chamber filled with Ar gas, or may be heated in the atmosphere to reduce equipment costs. The pre-treatment chamber 4 is a chamber for heating and evaporating organic materials such as oil adhering to the surface of the article to be treated and resin that may be contained in the article to be treated under reduced pressure to capture the organic material. . The pre-processing chamber 4 is a closed chamber provided with a heating means for heating the article to be processed (therefore, there are doors before and after).
Consists of A decompression pump 12 is connected to the pretreatment chamber 4 so as to provide an oxygen-free atmosphere so as not to oxidize the organic material and to allow the organic material to evaporate at a relatively low temperature. In the middle of the connection pipe, a filter 14 for capturing vapor of the evaporated organic material is provided.
【０００９】中間室６は、前処理室４と処理室８の間に
配設され、真空に近い状態を保ったまま連続して被処理
品が前処理室４から処理室８に搬入されることを可能に
している。中間室６は密閉室から成る（したがって、処
理室８と扉で仕切られることができる）。中間室６に
は、前処理室４と同様、減圧ポンプ１６が接続され、そ
の配管途中にフィルタ１８が設けられている。これによ
って、中間室６も前処理室４で除去しきれなかった有機
材を除去することができる。The intermediate chamber 6 is disposed between the pre-processing chamber 4 and the processing chamber 8, and articles to be processed are continuously carried into the processing chamber 8 from the pre-processing chamber 4 while maintaining a state close to vacuum. That makes it possible. The intermediate chamber 6 consists of a closed chamber (hence it can be separated from the processing chamber 8 by a door). A pressure reducing pump 16 is connected to the intermediate chamber 6 as in the pretreatment chamber 4, and a filter 18 is provided in the middle of the piping. Thus, the intermediate chamber 6 can also remove the organic material that cannot be completely removed in the pretreatment chamber 4.
【００１０】処理室８は、被処理品から付着金属を、た
とえば亜鉛メッキ鋼板から亜鉛を、蒸発させ回収するた
めの室である。処理室８は、図２にも示すように、開閉
可能な扉を有する密閉容器２６と、密閉容器２６内を加
熱する加熱手段２８とを有する。処理室８には、密閉容
器２６内を減圧するための減圧ポンプ２０が接続され、
その配管途中には蒸発金属を凝縮させて回収する回収装
置２２（凝縮器２２）が配設されている。処理室８に
は、さらに、密閉容器２６内に非酸化性ガス（たとえ
ば、Ａｒ、Ｎ2 ）を供給するガス供給手段３０が設けら
れてもよい。供給された非酸化性ガスは、加熱手段２８
が発熱体である場合に、加熱手段２８から被処理品への
熱伝達を可能にしている。非処理品加熱時には密閉容器
２６内は非酸化性ガスで充満され、金属蒸発時には高真
空とされなければならないので、密閉容器２６内はほぼ
大気圧と真空に近い圧力との間に圧力が少なくとも１回
変動する。ただし、非酸化性ガス供給手段３０は必須の
ものではなく、減圧状態を保持したまま、主にふく射と
伝導で被処理品を加熱してもよい。The processing chamber 8 is a chamber for evaporating and recovering adhered metal from the article to be processed, for example, zinc from a galvanized steel sheet. As shown in FIG. 2, the processing chamber 8 includes a sealed container 26 having a door that can be opened and closed, and a heating unit 28 that heats the inside of the sealed container 26. The processing chamber 8 is connected to a decompression pump 20 for depressurizing the inside of the closed container 26.
A collecting device 22 (condenser 22) for condensing and collecting the evaporated metal is provided in the middle of the pipe. The processing chamber 8 may further be provided with a gas supply means 30 for supplying a non-oxidizing gas (for example, Ar, N 2 ) into the closed vessel 26. The supplied non-oxidizing gas is supplied to the heating unit 28.
Is a heating element, heat can be transferred from the heating means 28 to the article to be processed. When the non-processed product is heated, the inside of the closed vessel 26 is filled with a non-oxidizing gas, and a high vacuum must be created when the metal is evaporated. Therefore, the pressure inside the closed vessel 26 is at least between the atmospheric pressure and the pressure close to the vacuum. It fluctuates once. However, the non-oxidizing gas supply means 30 is not essential, and the object to be processed may be heated mainly by radiation and conduction while maintaining the reduced pressure state.
【００１１】回収装置２２を処理室８と減圧ポンプ２０
との間に設けたのは、蒸発金属が減圧ポンプ２０に付着
してポンプの性能を低下させないようにするためであ
る。また、図２に示すように、処理室８と回収装置２２
を結ぶ配管にもヒータ３２と断熱材３４を巻いて、配管
部で蒸発金属が凝縮して通路が閉塞することがないよう
にしてある。The recovery unit 22 is connected to the processing chamber 8 and the vacuum pump 20.
The reason for this is to prevent the evaporated metal from adhering to the decompression pump 20 and lowering the performance of the pump. Also, as shown in FIG.
A heater 32 and a heat insulating material 34 are also wound around the pipe connecting the pipes to prevent the evaporation metal from condensing in the pipe and blocking the passage.
【００１２】図３−図５は、種々のタイプの回収装置２
２Ａ、２２Ｂ、２２Ｃを示している。図３はカッタータ
イプの回収装置２２Ａであり、真空シールモータ３６に
てギヤ３８を回転させ、ラック４０を上下させて、刃付
回転ペラ４２にて、凝縮金属をけずりとる。容器壁４４
は水冷してあり、壁面に蒸発金属が付着して凝縮する。
けずりとられた金属は扉４６を開いて取出す。蒸発金属
入口、および回転ペラのシャフト部はヒータ４８にて加
熱し、固着しないようにしておく。FIGS. 3 to 5 show various types of recovery devices 2.
2A, 22B and 22C are shown. FIG. 3 shows a cutter type recovery device 22A, in which a gear 38 is rotated by a vacuum seal motor 36, a rack 40 is moved up and down, and a condensed metal is scraped off by a rotary bladed blade 42. Container wall 44
Is water-cooled, and the evaporated metal adheres to the wall surface and condenses.
The scraped metal is taken out by opening the door 46. The inlet of the evaporated metal and the shaft of the rotary prop are heated by the heater 48 so as not to be fixed.
【００１３】図４は付着タイプの回収装置２２Ｂであ
り、フィルタ５０を設け、フィルタ５０を冷却すること
によりフィルタ部に蒸発金属を捕捉させる。フィルタ５
０の前後に扉５２、５４を設け、フィルタ変換時にはこ
の扉を使用して大気との圧力差を吸収する。構造的に
は、フィルタ５０部に圧力調整弁５６やバイパス５８が
必要である。FIG. 4 shows a recovery device 22B of the adhesion type, in which a filter 50 is provided, and the filter 50 is cooled to cause the filter portion to capture evaporated metal. Filter 5
Doors 52 and 54 are provided before and after 0, and the filter is used to absorb a pressure difference from the atmosphere during filter conversion. Structurally, the filter 50 requires a pressure regulating valve 56 and a bypass 58.
【００１４】図５は急冷タイプの回収装置２２Ｃを示し
ている。回収装置内に、モータ６０で回転される回転式
急冷体６２を設け、この急冷体表面に蒸発金属を付着さ
せることにより、金属をアモルファス化して粒状にす
る。この微細な粒状物を、回収装置２２Ｃの下部に蓄積
させる。回収は、扉６４、６６によって圧力差を吸収さ
せることにより、金属粉末を取出すことによって行な
う。たとえば、Ｚｎは、急冷するとアモルファス化する
が、このとき運動エネルギを与えることによって、微細
な粒状物になる。このようにして回収した金属Ｚｎは、
純度が９８％以上であり、良質な状態で回収できる。し
たがって、鋼材の再利用ばかりでなく、メッキ金属の回
収、再利用もはかられる。FIG. 5 shows a quenching type recovery device 22C. A rotary quenching body 62 rotated by a motor 60 is provided in the collection device, and the metal is made amorphous and granular by attaching evaporated metal to the surface of the quenching body. These fine particles are accumulated in the lower part of the recovery device 22C. The recovery is performed by removing the metal powder by absorbing the pressure difference by the doors 64 and 66. For example, Zn becomes amorphous when quenched, but at this time, kinetic energy is applied to form fine granular materials. The metal Zn thus recovered is
Purity is 98% or more and can be recovered in good quality. Therefore, not only the steel material can be reused, but also the plating metal can be recovered and reused.
【００１５】図１にて、冷却室１０は、処理室８から送
られてきた、亜鉛メッキを除去された鋼のみの、高温の
鋼板をエア、または非酸化性ガス（たとえばＡｒ）で冷
却する室である。鋼板を冷却することにより、ガス自体
の温度は上昇するが、これを循環通路２４を通して、前
述の予熱室２に循環させ、エネルギの有効利用をはかっ
てもよい。In FIG. 1, a cooling chamber 10 cools a high-temperature steel sheet, which is only a steel stripped of galvanized steel, sent from a processing chamber 8 by air or a non-oxidizing gas (for example, Ar). Room. Although the temperature of the gas itself rises by cooling the steel plate, the gas itself may be circulated through the circulation passage 24 to the preheating chamber 2 so as to effectively use the energy.
【００１６】次に、上記装置等を用いて実施される本方
法発明の実施例を説明する。まず、第１の工程におい
て、金属付着鋼板（たとえば、亜鉛メッキ鋼板）から成
る被処理品を予熱手段２にて予熱する。これによって、
被処理品を、対流熱伝達を利用して効果的に２００〜５
００°Ｃ近傍の温度に短時間に昇温できる。Next, a description will be given of an embodiment of the present invention implemented using the above-described apparatus and the like. First, in a first step, an article to be processed made of a metal-attached steel sheet (for example, a galvanized steel sheet) is preheated by the preheating means 2. by this,
The object to be treated is effectively reduced to 200 to 5 using convection heat transfer.
The temperature can be raised to a temperature close to 00 ° C in a short time.
【００１７】第２の工程において、被処理品を前処理室
４に入れ、被処理品の表面に付着している油等の有機材
または被処理品に含まれている有機材の種類、減圧下に
おけるその有機材の沸点（２００−５００℃）を考慮に
入れ、前処理室４を減圧するとともに加熱する。これに
よって、前処理室４にて有機材を、酸化させることな
く、蒸発させ、蒸発有機材をフィルタ１４にて捕捉す
る。In the second step, the article to be treated is put into the pretreatment chamber 4 and the kind of organic material such as oil adhering to the surface of the article to be treated or the organic material contained in the article to be treated is reduced. Taking into account the boiling point (200-500 ° C.) of the organic material below, the pretreatment chamber 4 is depressurized and heated. Thus, the organic material is evaporated in the pretreatment chamber 4 without being oxidized, and the evaporated organic material is captured by the filter 14.
【００１８】この有機材の除去によって、処理室８にお
けるＺｎの蒸発処理時にＺｎと有機材との反応によるＺ
ｎＣｌ2 、ＺｎＳ、ＺｎＳＯ4 の生成がなくなり、これ
らの化合物によるＺｎの蒸発の妨げがなくなるので、信
頼性の高いＺｎの蒸発が得られる。また、有機材のフィ
ルタ１４による回収によって、工場内への逸散が防止さ
れ、作業環境が大巾に改善される。一般的に鋼の切粉を
鋳造用原料に使用する場合、切削油が付着していると、
著しく作業環境が悪化する。従来は、切粉をアセトンで
脱脂するか、焼成するかして使用しているが、アセトン
による脱脂ではコスト的に大巾なアップになってしまう
し、焼成法では一部の切粉が酸化し、歩留りが悪くなっ
てしまう。本発明では、たとえば３００℃×１０-1ｍｍ
Ｈｇに被処理品を加熱保持することにより、切削油はほ
ぼ１００％気化され、除去される。この場合、Ｚｎの蒸
発の場合と異なり、油の気化を利用しただけであるの
で、加熱温度を５００℃以下にさげて処理を行っても問
題ない。The removal of the organic material allows the Z to react with the organic material during the evaporation of Zn in the processing chamber 8.
Since generation of nCl 2 , ZnS, and ZnSO 4 is eliminated, and obstruction of the evaporation of Zn by these compounds is eliminated, highly reliable evaporation of Zn can be obtained. In addition, the collection of the organic material by the filter 14 prevents the organic material from escaping into the factory and greatly improves the working environment. In general, when using steel chips as a raw material for casting, if cutting oil is attached,
The working environment deteriorates significantly. Conventionally, chips are degreased with acetone or baked, but degreasing with acetone results in a large increase in cost, and in the calcination method, some chips are oxidized. Then, the yield becomes worse. In the present invention, for example, 300 ° C. × 10 −1 mm
By heating and holding the workpiece to Hg, the cutting oil is vaporized and removed almost 100%. In this case, unlike the case of the evaporation of Zn, only the vaporization of oil is used, so that there is no problem even if the treatment is performed at a heating temperature of 500 ° C. or lower.
【００１９】第３の工程において、被処理品を減圧され
た中間室６を介して前処理室４から処理室８に搬送す
る。前処理室４で蒸発による除去ができなかった有機材
は蒸発、除去され、完全か、またはほぼ完全に除去され
る。また、中間室６は前処理と本処理とを連続して行う
ことを可能にしている。前処理を真空中で行うため、搬
送中に圧力が大気圧に戻ると、本処理時に再度高真空に
しなければならないが、これは時間や電力の浪費を伴
う。しかし、本発明では中間室６があるため、そのよう
な不利が解消される。また、中間室６があるため、被処
理品を処理室側の扉を開けて処理室８に入れるときに前
処理室側の扉を閉めておくことにより、処理室８と前処
理室４との直接の連通が防止され、蒸発金属が処理室８
から前処理室４に流れて、前処理室４内のより低温の被
処理品に凝着することが防止される。In the third step, the article to be processed is transported from the pre-processing chamber 4 to the processing chamber 8 via the depressurized intermediate chamber 6. The organic material that cannot be removed by evaporation in the pretreatment chamber 4 is evaporated and removed, and is completely or almost completely removed. Further, the intermediate chamber 6 enables the pre-processing and the main processing to be performed continuously. Since the pre-processing is performed in a vacuum, if the pressure returns to the atmospheric pressure during transportation, the vacuum must be again increased during the main processing, but this consumes time and power. However, in the present invention, since the intermediate chamber 6 is provided, such disadvantage is solved. Further, since the intermediate chamber 6 is provided, the door on the pre-processing chamber side is closed when the article to be processed is opened and the door on the processing chamber side is opened, so that the processing chamber 8 and the pre-processing chamber 4 can be closed. Is prevented from directly communicating with the processing chamber 8.
From the pretreatment chamber 4 and adhere to the lower-temperature processing target in the pretreatment chamber 4.
【００２０】第４の工程において、被処理品を処理室８
に入れ、減圧するとともに、５００〜９５０℃に加熱し
て鋼材に付着している金属、たとえば亜鉛を蒸発させ
る。そして、蒸発金属を処理室８とは別に設けた回収装
置２２に導いて、凝縮させて回収する。真空脱Ｚｎは、
１０-4〜１０-1ｍｍＨｇの真空中で、５００〜９００℃
に被処理品を加熱することにより行う。たとえば、図２
において、開閉可能の扉をあけて被処理品を密閉容器２
６内に入れて扉を閉じ、減圧ポンプ２０を作動させて密
閉容器２６内を１０-1〜１０-4Ｔｏｒｒ程度にまで減圧
する。これによって、酸素を抜く。ついで、ガス供給手
段（たとえば、ボンベ）３０から非酸化性ガス（たとえ
ば、Ａｒ、Ｎ2 ）を供給してから撹拌器を作動させて雰
囲気を撹拌しながら、加熱手段２８によって所定の温度
まで昇温させる。被処理品の温度は、供給ガスの熱伝達
の作用で上昇し、ある程度の温度（あまり蒸発しない温
度）まで加熱した後、減圧しさらに被処理品を加熱し付
着金属を蒸発させる。ただし、非酸化性ガスを供給しな
いで、真空状態を保持したまま被処理品を加熱してもよ
い。In the fourth step, the article to be processed is placed in the processing chamber 8.
While reducing the pressure and heating to 500 to 950 ° C. to evaporate the metal, for example zinc, adhering to the steel material. Then, the evaporated metal is guided to a recovery device 22 provided separately from the processing chamber 8, and is condensed and recovered. Vacuum removal Zn
500 to 900 ° C. in a vacuum of 10 -4 to 10 -1 mmHg
By heating the article to be treated. For example, FIG.
, Open the door that can be opened and closed
6, the door is closed, and the pressure reducing pump 20 is operated to reduce the pressure in the sealed container 26 to about 10 -1 to 10 -4 Torr. This removes oxygen. Next, a non-oxidizing gas (for example, Ar, N 2 ) is supplied from a gas supply unit (for example, a cylinder) 30, and then the temperature is raised to a predetermined temperature by a heating unit 28 while operating the stirrer to stir the atmosphere. Let warm. The temperature of the article to be treated rises by the action of the heat transfer of the supplied gas, and after heating to a certain temperature (a temperature that does not evaporate too much), the pressure is reduced and the article to be treated is heated to evaporate the deposited metal. However, the article to be processed may be heated without supplying a non-oxidizing gas and maintaining a vacuum state.
【００２１】この場合、有機材が既に除去されているか
ら、Ｚｎは一定温度で、効果的に蒸発する。蒸発した金
属（気体）は回収装置２２で冷却され、凝縮して固体金
属となり、回収される。この回収金属は、金属の蒸発を
利用したものであるから、極めて高純度のものであり、
再利用される。In this case, since the organic material has already been removed, Zn evaporates effectively at a constant temperature. The evaporated metal (gas) is cooled by the recovery device 22 and condensed into a solid metal, which is recovered. Since this recovered metal utilizes the evaporation of metal, it is of extremely high purity,
Reused.
【００２２】第５の工程において、付着金属が除去され
た被処理品は、冷却室１０に送られ、そこで冷却され
る。冷却室１０と非酸化性ガスを循環してもよく、その
場合は、循環している非酸化性ガスにより冷却される。
冷却された被処理品は、冷却室１０から取出されて、製
鋼原料として再利用される。Ｚｎ等が付着していないの
で、炉を傷めることはない。In the fifth step, the workpiece from which the adhered metal has been removed is sent to the cooling chamber 10 where it is cooled. The cooling chamber 10 and the non-oxidizing gas may be circulated. In this case, the cooling chamber 10 is cooled by the circulating non-oxidizing gas.
The cooled article is taken out of the cooling chamber 10 and reused as a steelmaking raw material. Since no Zn or the like is attached, the furnace is not damaged.
【００２３】冷却ガスが循環される場合は、冷却室１０
における被処理品の冷却により、自身は高温とされたガ
スは、予熱室２に循環され、新たに送給されてくる被処
理品の予熱に利用される。When the cooling gas is circulated, the cooling chamber 10
The gas heated to a high temperature by the cooling of the article to be processed is circulated to the preheating chamber 2 and used for preheating the article to be newly supplied.
【００２４】上記工程において、本発明の必須の工程
は、前処理室４における有機材除去工程（第２の工程）
と、処理室８における付着金属除去工程（第４の工程）
である。また、上記実施例では、付着金属として亜鉛Ｚ
ｎを例にとったが、アルミニウムＡｌも類似の沸点をも
つので、Ａｌ蒸発除去にも利用できる。すなわち、Ａｌ
メッキ鋼板のＡｌについて除去を試みたところ、Ａｌメ
ッキ鋼板を９００℃×１０-4ｍｍＨｇに加熱保持するこ
とにより、Ｚｎ鋼板と同様に、ほぼ完全な除去ができ
る。これは、Ｚｎの場合と同様に、Ａｌの蒸気圧を利用
したものであり、Ａｌの蒸気圧は約８００°Ｃで１０-4
ｍｍＨｇであるため、本発明の条件内で処理を行うこと
により、Ａｌが除去できたと考える。In the above steps, an essential step of the present invention is an organic material removing step in the pretreatment chamber 4 (second step).
And an attached metal removing step in the processing chamber 8 (fourth step)
It is. In the above embodiment, zinc Z is used as the adhering metal.
Although n is taken as an example, aluminum Al also has a similar boiling point and can be used for Al evaporation removal. That is, Al
When an attempt was made to remove Al from the plated steel sheet, almost complete removal can be achieved by heating and holding the Al-plated steel sheet at 900 ° C. × 10 −4 mmHg, similarly to the Zn steel sheet. This utilizes the vapor pressure of Al, as in the case of Zn, and the vapor pressure of Al is 10 −4 at about 800 ° C.
Since it is mmHg, it is considered that Al was removed by performing the treatment under the conditions of the present invention.
【００２５】本発明による脱Ｚｎの性能を確認するため
に、溶融Ｚｎメッキ鋼板（両面６０ｇ／ｍ2 目付、Ｚｎ
の付着量が約２重量％）を使用して、以下に示す試験を
行った。In order to confirm the performance of Zn removal according to the present invention, a hot-dip galvanized steel sheet (both sides 60 g / m 2 basis weight, Zn
The following test was carried out using the above-mentioned method.
【００２６】試験例１ １０-4ｍｍＨｇの減圧状態で３００〜１０００℃の加熱
保持を行い、脱Ｚｎ状態を調査した。加熱速度は１５℃
／ｍｉｎ一定、保持時間は約１０分とした。その結果を
図６に示す。図６の結果からわかるように、３００℃時
には、約０．２６％のＺｎ付着量であったのに対し、６
００℃時には（５００℃以上が本発明）０．０２９％で
あり、著しいＺｎ除去効果が得られた。また、９００℃
時には、０．００２％、１０００℃時には０．００７％
のＺｎ付着量であり、ほぼ完全に除去できた。９００℃
時と１０００℃時の値の違いは、分析誤差によるもので
ある。Test Example 1 Heating and holding at 300 to 1000 ° C. under a reduced pressure of 10 −4 mmHg was conducted to examine the state of removing Zn. Heating rate is 15 ° C
/ Min, and the holding time was about 10 minutes. FIG. 6 shows the result. As can be seen from the results of FIG. 6, the Zn deposition amount at about 300 ° C. was about 0.26%,
At 00 ° C (500 ° C or higher according to the present invention) was 0.029%, and a remarkable Zn removing effect was obtained. 900 ° C
Sometimes 0.002%, 1000 ° C 0.007%
, And could be almost completely removed. 900 ° C
The difference between the time and the value at 1000 ° C. is due to an analysis error.
【００２７】試験例２ １０-1ｍｍＨｇの減圧状態で、７５０℃、９００℃の加
熱保持を行い、脱Ｚｎ状態の検討を行うとともに、回収
されたＺｎの状態について分析を行った。加熱速度は２
０℃／ｍｉｎ一定、保持時間については約１０分とし
た。結果としては、Ｚｎ付着量は、７５０℃、９００℃
時とも、０．０１％であり、ほぼ完全に除去できたこと
を確認した。また、回収されたＺｎについて分析を行っ
た結果、回収物は金属Ｚｎと酸化亜鉛が混在したものに
はなっていたが、Ｚｎ量としては９５％であり、かなり
高純度のＺｎが回収できた。従来法が約８０％であった
ことを考慮に入れると、本発明の効果が大きいことがわ
かる。Test Example 2 Heating and holding at 750 ° C. and 900 ° C. under a reduced pressure of 10 −1 mmHg was conducted to examine the state of Zn removal, and to analyze the state of the recovered Zn. Heating rate is 2
The temperature was kept constant at 0 ° C./min, and the holding time was about 10 minutes. As a result, the Zn deposition amount was 750 ° C., 900 ° C.
Sometimes, it was 0.01%, and it was confirmed that it was almost completely removed. In addition, as a result of analyzing the recovered Zn, the recovered material was a mixture of metal Zn and zinc oxide. However, the Zn content was 95%, and Zn of considerably high purity could be recovered. . Taking into account that the conventional method is about 80%, it can be seen that the effect of the present invention is great.
【００２８】試験例３ ５×１０-1ｍｍＨｇと、１０ｍｍＨｇの減圧状態で、４
００℃〜９００℃の加熱保持を行い、脱Ｚｎ状態を調査
した。その結果を図７に示す。図７の結果からわかるよ
うに、５×１０-1ｍｍＨｇの条件では４００℃のＺｎ残
留量が０．８６ｗｔ％であるのに対し、９００℃では
０．００２ｗｔ％であり、本発明条件では著しい効果が
あると言える。また１０ｍｍＨｇの条件で９００℃の加
熱保持を行った結果、Ｚｎ残留量は０．０９２ｗｔ％で
あり、若干真空度を落しても、脱Ｚｎとしての効果は十
分ある事が確認された。Test Example 3 Under the reduced pressure of 5 × 10 -1 mmHg and 10 mmHg, 4
Heating and holding at 00 ° C to 900 ° C were performed, and the state of Zn removal was investigated. FIG. 7 shows the result. As can be seen from the results of FIG. 7, the Zn residual amount at 400 ° C. is 0.86 wt% under the condition of 5 × 10 −1 mmHg, whereas it is 0.002 wt% at 900 ° C., which is remarkable under the conditions of the present invention. It can be said that it is effective. In addition, as a result of heating and holding at 900 ° C. under the condition of 10 mmHg, the residual amount of Zn was 0.092 wt%, and it was confirmed that even if the degree of vacuum was slightly lowered, the effect of removing Zn was sufficient.
【００２９】試験例４ ５×１０-1ｍｍＨｇの減圧状態で、６００℃〜９００℃
の加熱保持を行い、保持時間を変える事による脱Ｚｎ状
態を調査した。その結果を図８に示す。図８の結果から
分かるように、６００℃では時間をかければ脱Ｚｎの効
率は向上するが、７００℃、９００℃では。短時間も効
果が大きい事が確認された。６００℃では、保持時間が
５分、３０分ではＺｎ残留量が０．４ｗｔ％前後である
のに対し、１００分まで処理を行うと、０．１ｗｔ％以
下になった。７００℃では、５分の処理時間でもＺｎ残
留量は約０．０５ｗｔ％であり、３０分まで処理を行う
とさらにＺｎ残留量は低下する。また９００℃において
も同様であった。Test Example 4 600 ° C. to 900 ° C. under reduced pressure of 5 × 10 -1 mmHg
Was heated and held, and the Zn removal state by changing the holding time was investigated. FIG. 8 shows the result. As can be seen from the results of FIG. 8, at 600 ° C., the efficiency of Zn removal improves with time, but at 700 ° C. and 900 ° C. It was confirmed that the effect was large even for a short time. At 600 ° C., the retention time was 5 minutes, and the residual amount of Zn was around 0.4 wt% for 30 minutes, whereas when the treatment was performed up to 100 minutes, it became 0.1 wt% or less. At 700 ° C., the residual amount of Zn is about 0.05 wt% even for a treatment time of 5 minutes, and when the treatment is performed up to 30 minutes, the residual amount of Zn further decreases. The same was true at 900 ° C.
【００３０】[0030]
【発明の効果】請求項１の方法によれば、被処理品を減
圧下で２００〜５００℃に加熱して有機材を蒸発させ捕
捉し、ついで被処理品を減圧下で５００〜９５０℃に加
熱して鋼板にメッキ等で付着している金属を蒸発させ回
収するようにしたので、有機材と蒸発金属との化合物の
形成を防止でき、金属蒸発を円滑に行わせしめることが
可能となった。請求項２の方法によれば、さらに予熱工
程を設けたので被処理品の昇温時間を短縮できる。ま
た、中間室を介しての搬送としたので、処理室での蒸発
金属が前処理室に流れて被処理品に凝着することを防止
できる。請求項３の装置によれば、前処理室と処理室と
を設けたので、前処理室で有機材を蒸発させて除去する
ことにより、処理室での付着金属の鋼板からの蒸発除去
効率を向上できる。請求項４の装置によれば、中間室を
設けたので前処理室と処理室の直接の連通を防止でき、
蒸発金属が処理室から前処理室に流れて被処理品に凝着
することを防止できる。請求項５の装置によれば、前処
理室の前段に予熱手段を設けたので、被処理品の昇温時
間を短縮できる。According to the method of the first aspect, the article to be treated is heated to 200 to 500 ° C. under reduced pressure to evaporate and trap the organic material, and then the article to be treated is reduced to 500 to 950 ° C. under reduced pressure. Heating was performed to evaporate and collect the metal adhering to the steel plate by plating or the like, which prevented the formation of a compound between the organic material and the evaporating metal, and made it possible to smoothly evaporate the metal. . According to the method of the second aspect, since the preheating step is further provided, the time for raising the temperature of the article to be processed can be reduced. Further, since the transfer is performed through the intermediate chamber, the evaporated metal in the processing chamber can be prevented from flowing into the preprocessing chamber and sticking to the article to be processed. According to the apparatus of claim 3, since the pre-processing chamber and the processing chamber are provided, the organic material is evaporated and removed in the pre-processing chamber, so that the efficiency of evaporating and removing the adhered metal from the steel plate in the processing chamber is improved. Can be improved. According to the apparatus of claim 4, since the intermediate chamber is provided, direct communication between the pre-processing chamber and the processing chamber can be prevented,
Evaporated metal can be prevented from flowing from the processing chamber to the preprocessing chamber and adhering to the article to be processed. According to the apparatus of the fifth aspect, since the preheating means is provided in the preceding stage of the pretreatment chamber, the time for raising the temperature of the article to be treated can be reduced.
【図１】本発明の金属付着鋼板の付着金属除去装置の概
略機器配置図である。FIG. 1 is a schematic equipment layout of an apparatus for removing adhered metal from a metal-attached steel sheet according to the present invention.
【図２】図１のうち処理室と回収装置近傍の概略構成図
である。FIG. 2 is a schematic configuration diagram of the vicinity of a processing chamber and a recovery device in FIG.
【図３】図２の処理装置に適用可能なカッタータイプの
回収装置の概略断面図である。FIG. 3 is a schematic sectional view of a cutter-type recovery device applicable to the processing device of FIG. 2;
【図４】図２の処理装置に適用可能な付着タイプの回収
装置の概略断面図である。FIG. 4 is a schematic cross-sectional view of an adhesion type recovery device applicable to the processing device of FIG. 2;
【図５】図２の処理装置に適用可能な急冷タイプの回収
装置の概略断面図である。FIG. 5 is a schematic sectional view of a quenching type recovery apparatus applicable to the processing apparatus of FIG. 2;
【図６】本発明の方法による脱Ｚｎ試験結果の一例を示
すＺｎ付着量対温度図である。FIG. 6 is a diagram illustrating an example of the results of a Zn removal test according to the method of the present invention versus the Zn deposition amount versus temperature.
【図７】本発明の方法による脱Ｚｎ試験結果のもう一つ
の例を示すＺｎ残量対処理温度図である。FIG. 7 is a plot of Zn remaining amount versus processing temperature showing another example of the Zn removal test result by the method of the present invention.
【図８】本発明の方法による脱Ｚｎ試験結果のさらにも
う一つの例を示すＺｎ残量対処理温度図である。FIG. 8 is a diagram showing a Zn remaining amount versus a processing temperature, showing still another example of the results of the Zn removal test by the method of the present invention.
【符号の説明】 ２ 予熱手段（予熱室） ４ 前処理室 ６ 中間室 ８ 処理室 １０ 冷却室 １２ 減圧ポンプ １４ フィルタ ２０ 減圧ポンプ ２２ 回収装置 ２４ 循環通路[Description of Signs] 2 Preheating means (Preheating chamber) 4 Pretreatment chamber 6 Intermediate chamber 8 Processing chamber 10 Cooling chamber 12 Decompression pump 14 Filter 20 Decompression pump 22 Recovery device 24 Circulation passage
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 和弘 愛知県豊田市鴻ノ巣町３丁目33番地 ト ヨキン株式会社内 (72)発明者 篠山 輝治 愛知県豊田市鴻ノ巣町３丁目33番地 ト ヨキン株式会社内 (56)参考文献 特開 平４−225876（ＪＰ，Ａ) 特公 昭61−23858（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiro Suzuki 3-33 Konosu-cho, Toyota City, Aichi Prefecture Toyokin Corporation (72) Inventor Teruji Shinoyama 3-33 Konosu-cho, Toyota City, Aichi Prefecture Toyokin Corporation (56) References JP-A-4-225876 (JP, A) JP-B-61-23858 (JP, B2)
Claims (5)
で２００〜５００℃に加熱して被処理品の表面に付着し
ている有機材を蒸発させ捕捉する工程と、 付着した有機材が蒸発除去された被処理品を減圧下で５
００〜９５０℃に加熱して鋼板に付着している金属を蒸
発させ回収する工程と、 から成る金属付着鋼板の付着金属除去方法。1. A step of heating an object to be treated made of a metal-attached steel plate to 200 to 500 ° C. under reduced pressure to evaporate and trap an organic material adhering to the surface of the object to be treated. The object to be removed which has been evaporated is removed under reduced pressure for 5 minutes.
A step of heating to 00 to 950 ° C. to evaporate and recover the metal adhering to the steel sheet;
でない条件下で予熱する工程と、 予熱された被処理品を前処理室内にて減圧下で２００〜
５００°Ｃに加熱して前記被処理品に付着している有機
材を蒸発させ捕捉する工程と、 有機材が蒸発除去された被処理品を前記前処理室から中
間室を介して処理室へと搬送する工程と、 前記処理室に搬送された被処理品を前記処理室内で減圧
下で５００〜９５０°Ｃに加熱して鋼板に付着している
金属を蒸発させ回収させる工程と、 付着金属が蒸発除去された鋼板を冷却室で冷却する工程
と、 から成る金属付着鋼板の付着金属除去方法。2. A step of preheating an article to be treated made of a metal-coated steel sheet under a condition not under reduced pressure;
A step of heating to 500 ° C. to evaporate and trap the organic material adhering to the article to be treated, and the step of treating the article from which the organic material has been removed by evaporation from the pretreatment chamber to the treatment chamber via the intermediate chamber. Heating the workpiece transported to the processing chamber to 500 to 950 ° C. under reduced pressure in the processing chamber to evaporate and collect the metal adhering to the steel sheet; Cooling the steel sheet from which the metal has been evaporated by a cooling chamber.
理品を２００〜５００°Ｃに加熱可能な加熱手段を有す
る前処理室と、 前記前処理室より後段に配され、減圧可能で、前記被処
理品を５００〜９５０°Ｃに加熱可能な加熱手段を有す
る処理室と、 を備えた金属付着鋼板の付着金属除去装置。3. A pretreatment chamber having heating means capable of heating a workpiece made of a metal-attached steel plate at 200 to 500 ° C. which can be depressurized, and disposed at a stage subsequent to the pretreatment chamber, and capable of depressurization. A treatment chamber having a heating means capable of heating the article to be processed to 500 to 950 ° C .;
室を備えている請求項３記載の金属付着鋼板の付着金属
除去装置。4. The apparatus according to claim 3, further comprising an intermediate chamber between the pre-processing chamber and the processing chamber.
下で被処理品を予熱する予熱手段を備えている請求項３
記載の金属付着鋼板の付着金属除去装置。5. A preheating means for preheating an object to be processed under a condition not under reduced pressure, in a stage preceding the preprocessing chamber.
An apparatus for removing adhered metal from a metal-attached steel sheet as described in the above.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14663691A JP2717326B2 (en) | 1991-05-23 | 1991-05-23 | Method and apparatus for removing adhered metal from metal-attached steel sheet |
| DE19924217081 DE4217081C2 (en) | 1991-05-23 | 1992-05-22 | Device for removing plated metal from scrap steel |
| US08/155,810 US5350438A (en) | 1991-05-23 | 1993-11-23 | Method and apparatus for removing plated metal from steel sheet scraps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14663691A JP2717326B2 (en) | 1991-05-23 | 1991-05-23 | Method and apparatus for removing adhered metal from metal-attached steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04346681A JPH04346681A (en) | 1992-12-02 |
| JP2717326B2 true JP2717326B2 (en) | 1998-02-18 |
Family
ID=15412212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14663691A Expired - Lifetime JP2717326B2 (en) | 1991-05-23 | 1991-05-23 | Method and apparatus for removing adhered metal from metal-attached steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2717326B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160060824A (en) * | 2014-11-20 | 2016-05-31 | 재단법인 포항산업과학연구원 | Thermo reduction apparatus |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0816248B2 (en) * | 1991-11-29 | 1996-02-21 | 株式会社オギハラ | Vacuum evaporation recovery method |
| JPH0530149U (en) * | 1991-06-27 | 1993-04-20 | 株式会社オギハラ | Vacuum evaporation recovery device |
| JPH05331563A (en) * | 1991-07-31 | 1993-12-14 | Ogihara:Kk | Direct electrically heated vacuum-evaporation recovery method |
| JPH05306417A (en) * | 1991-07-31 | 1993-11-19 | Ogihara:Kk | Induction heating vacuum vaporizing recovery method and apparatus therefor |
| JPH05331564A (en) * | 1991-08-29 | 1993-12-14 | Ogihara:Kk | Method and device for induction-heated vacuum evaporation recovery |
| JPH08188833A (en) * | 1991-09-17 | 1996-07-23 | Yoshiaki Yokoyama | Method and equipment for evaporation and recovery in vacuum |
| EP0694623A3 (en) * | 1994-07-29 | 1996-04-17 | Teruhisa Ogihara | Method for processing metallic waste |
| JPH09287033A (en) * | 1995-05-31 | 1997-11-04 | Toyota Motor Corp | Treatment of waste containing oxide and method therefor |
| DE19781654T1 (en) * | 1996-03-15 | 1999-04-29 | Ogihara Ecology Co | Machining equipment, machining system and machining method |
| WO1998005439A1 (en) * | 1996-08-01 | 1998-02-12 | Itochu Shoji Kabushikikaisha | Method of thermal decomposition of scrap motor vehicle and apparatus therefor |
-
1991
- 1991-05-23 JP JP14663691A patent/JP2717326B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160060824A (en) * | 2014-11-20 | 2016-05-31 | 재단법인 포항산업과학연구원 | Thermo reduction apparatus |
| KR101628655B1 (en) | 2014-11-20 | 2016-06-13 | 재단법인 포항산업과학연구원 | Thermo reduction apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04346681A (en) | 1992-12-02 |
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