JP2005214512A - Contact heating/atmospheric furnace for long and flat material - Google Patents

Contact heating/atmospheric furnace for long and flat material Download PDF

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JP2005214512A
JP2005214512A JP2004021613A JP2004021613A JP2005214512A JP 2005214512 A JP2005214512 A JP 2005214512A JP 2004021613 A JP2004021613 A JP 2004021613A JP 2004021613 A JP2004021613 A JP 2004021613A JP 2005214512 A JP2005214512 A JP 2005214512A
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furnace
drum
long
heated
heat
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JP4427813B2 (en
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Shinichi Takahashi
慎一 高橋
Satoshi Mizuguchi
智 水口
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Kanto Yakin Kogyo Co Ltd
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<P>PROBLEM TO BE SOLVED: To provide an industrial furnace capable of shortening an opportunity and a time when a long and flat material is kept into contact with a conveying means in the furnace, and heating the material in a short time without impairing its physical property and quality, when the long and flat material such as a metallic fiber sheet is heated in the furnace. <P>SOLUTION: The required number of drums rotatable in synchronization with a feeding speed of the material are mounted in the furnace to support and convey the material in the furnace, the material is kept into contact with a part of an outer periphery of the drums to be heated, and the drums and/or a furnace inner wall are carbonaceous to keep a neutral or reducing furnace atmosphere to the material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、長尺で平らな材料、例えば銅短繊維グリンシートを加熱して脱脂、焼成するときに好適に用い得る加熱炉にかかるものである。   The present invention relates to a heating furnace that can be suitably used when heating and degreasing and firing a long and flat material such as a copper short fiber green sheet.

上記した種類の材料には、その他に電極シート等が挙げられる。かかる長尺で平らな材料を熱処理する場合には、トンネル状の連続炉が広く用いられている。連続炉は他の熱処理炉に比して優れた種々の利点を有するが、連続炉による加熱処理には長い距離に亘る工程が必要である。そこで採用される長尺で質量の大きい循環搬送ベルトによる熱の損失、または長尺なベルトとこれまた長尺な被加熱処理材料と間の摩擦によって生じる材料の不具合等が問題となる。   In addition, the above-mentioned types of materials include electrode sheets. When heat-treating such a long and flat material, a tunnel-like continuous furnace is widely used. A continuous furnace has various advantages over other heat treatment furnaces, but heat treatment by a continuous furnace requires a process over a long distance. Therefore, there is a problem of heat loss due to the long and large circulation transport belt employed, or a material failure caused by friction between the long belt and a long heat-treated material.

特開平１０−２２８８９８号公報 この特許文献では、電極シートの如き長尺で平らな材料を、上述したような不具合なしに熱処理する一つの発明が開示されている。In this patent document, one invention is disclosed in which a long and flat material such as an electrode sheet is heat-treated without the above-described problems.

本発明は、上記で触れたような今までの技術よりも更に効率的に、長尺で平らな材料を加熱処理できる炉を提供することを課題とする。言い換えれば、長尺で平らな材料が搬送手段と接触する機会と時間を短くし、しかも短時間でその材質を損なわずに該材料が加熱されることを課題とする。   An object of the present invention is to provide a furnace capable of heat-treating a long and flat material more efficiently than the conventional techniques as mentioned above. In other words, it is an object to shorten the opportunity and time for a long and flat material to come into contact with the conveying means, and to heat the material without damaging the material in a short time.

本発明は、長尺で平らな材料の所定の加熱処理速度と同期して回転して、炉内で材料を支持・搬送するドラムを加熱手段とする。被加熱処理材料は加熱したドラムの外周面の一部と接触して、伝導加熱される。また、ドラムあるいは炉内壁、またはその双方を炭素質とする。   The present invention uses a drum that rotates in synchronization with a predetermined heat treatment speed of a long and flat material and supports and conveys the material in a furnace as a heating means. The material to be heated comes into contact with a part of the outer peripheral surface of the heated drum and is conductively heated. Further, the drum and / or the furnace inner wall are made carbonaceous.

この発明になる炉における加熱されたドラムと被加熱処理材料との間の接触伝導加熱は、材料が輻射または対流加熱される場合に比して、短時間でしかも材料に不具合を生じる間を与えないで、長尺で平らな材料を加熱できる。更にまた、この発明で採用した炭素質の炉内壁またはドラムは、４００℃以上に加熱されたときに活性であって、被加熱処理材料を保護する炉内雰囲気中へ持ち込まれる外乱の酸素を吸着して、そのほとんどをCOとして炉内外へ排出させる効果がある。   The contact conduction heating between the heated drum and the material to be heated in the furnace according to the present invention provides a short time and a period during which the material is defective as compared with the case where the material is radiated or convectively heated. Without it, long and flat materials can be heated. Furthermore, the carbonaceous furnace inner wall or drum employed in the present invention is active when heated to 400 ° C. or higher and adsorbs disturbance oxygen brought into the furnace atmosphere protecting the material to be heated. And most of it has the effect of exhausting into and out of the furnace as CO.

図１〜図４には、本発明になる接触加熱・雰囲気炉の３実施例が示されており、各実施例に共通な部分と部材には、同一の符号が付されている。   1 to 4 show three embodiments of the contact heating / atmosphere furnace according to the present invention, and parts and members common to the embodiments are denoted by the same reference numerals.

図１を参照して、炉１はセラミック繊維になる断熱材５で囲まれて外気と断熱されて、炉室２がつくられる。この炉室２には、長尺で平らな被加熱処理材料１０をそこに搬入する搬入口３と、そこから該材料１０を搬出する搬出口４とを有している。この被加熱処理材料の移動方向と直交する一軸を中心としてドラム７が回転自在に枢支される。この実施例１では、このドラム４は炭素質の材料、グラファイトでつくられている。ローラー群９によって、材料の移動速度と同期してこのドラム４は回転し、その外周面の一部で常に材料１０の一面と接触する。 Referring to FIG. 1, a furnace 1 is surrounded by a heat insulating material 5 that is a ceramic fiber, and is insulated from the outside air to form a furnace chamber 2. The furnace chamber 2 has a carry-in port 3 through which a long and flat material 10 to be heated is carried, and a carry-out port 4 through which the material 10 is carried out. The drum 7 is pivotally supported around one axis orthogonal to the moving direction of the material to be heated. In the first embodiment, the drum 4 is made of a carbonaceous material, graphite. The drum 4 rotates by the group of rollers 9 in synchronization with the moving speed of the material, and always contacts one surface of the material 10 at a part of its outer peripheral surface.

中空の該ドラム７の内部にはチューブヒーター８があって、ドラムを所望の温度に加熱し、この加熱されたドラムは、上述した通りにその一部で材料１０の一面と接触して材料を伝導加熱する。管１１より窒素、窒素と水素の混合ガス、またはDXガス等の所望の炉内雰囲気ガスが炉室内へ送られ、材料を保護するこのガスは順次に搬入、搬出口３，４から排出されて、これらの口から大気が炉内へ侵入するのを防ぐと共に、被加熱材料から蒸発するバインダー蒸気等をも炉外へ排出する。   Inside the hollow drum 7 there is a tube heater 8 which heats the drum to the desired temperature and this heated drum is partly in contact with one side of the material 10 as described above. Conductive heating. A desired furnace atmosphere gas such as nitrogen, a mixed gas of nitrogen and hydrogen, or a DX gas is sent from the tube 11 into the furnace chamber, and this gas for protecting the material is sequentially carried in and discharged from the carry-out ports 3 and 4. In addition to preventing the atmosphere from entering the furnace from these ports, binder vapor evaporated from the material to be heated is also discharged out of the furnace.

被加熱処理材料に付着して炉室内へもたらされる空気中の酸素は、４００℃以上に加熱されて活性化されたドラム７のグラファイトに吸着され、その大部分がCOとして炉内雰囲気中に放出される。従って、炉内雰囲気ガスが汚染されることがない。   Oxygen in the air that adheres to the material to be heated and is brought into the furnace chamber is adsorbed by the activated graphite of the drum 7 heated to 400 ° C. or more, and most of it is released as CO into the furnace atmosphere. Is done. Therefore, the furnace atmosphere gas is not contaminated.

図２にて図示される本発明になるこの実施例の接触加熱・雰囲気炉の構成は、上記実施例１の炉の構成と基本的に同一である。ただし、この実施例２では、２個のドラム７が炉室内に設けられ、これらが間隔をおいて並列する同一な水平面上の軸で枢支されている。また、雰囲気ガスの送気管も２個設けられている。雰囲気ガス，即ドラム７を加熱するチューブヒーター８はドラム外の炉室内に配置されている。また、ドラムはこの実施例では、耐熱ステンレス鋼のSUS３１０Sでつくられ、一方炉内壁６はグラファイトでつくられている。この実施例では、材料１０はその両面が交互にドラム７の外周面の一部と接触する。   The configuration of the contact heating / atmosphere furnace of this embodiment according to the present invention illustrated in FIG. 2 is basically the same as the configuration of the furnace of the first embodiment. However, in the second embodiment, two drums 7 are provided in the furnace chamber, and these drums 7 are pivotally supported by a shaft on the same horizontal plane arranged in parallel at a distance. Two atmosphere gas supply pipes are also provided. A tube heater 8 for immediately heating the atmospheric gas and the drum 7 is disposed in a furnace chamber outside the drum. In this embodiment, the drum is made of heat-resistant stainless steel SUS310S, while the furnace inner wall 6 is made of graphite. In this embodiment, the material 10 alternately contacts a part of the outer peripheral surface of the drum 7.

図３と図４で図示される本発明になるこの炉の構成は、前記実施例２の接触加熱・雰囲気炉とその基本的な構造において同一である。ただし、この実施例では、両端が閉鎖されたドラム７の加熱は、その外周面と摺接する抵抗加熱電極１４によってなされる。炉内壁は実施例２と同様にグラファイトでつくられている。   The structure of the furnace according to the present invention illustrated in FIGS. 3 and 4 is the same as that of the contact heating / atmosphere furnace of the second embodiment in its basic structure. However, in this embodiment, the drum 7 whose both ends are closed is heated by the resistance heating electrode 14 which is in sliding contact with the outer peripheral surface thereof. The inner wall of the furnace is made of graphite as in the second embodiment.

炉内雰囲気は、この実施例３では炉室内の下方で開口する送気管１１と、ドラム７内へ開口する送気管１１で送られる。図４で図示される通り、ドラム７内へ送られた雰囲気ガスはドラム７の外周面に多数設けられたスリット１２から炉室内へ噴出し、加熱された被加熱処理材料１０からのバインダー蒸気等の炉室内への放出を容易にする。雰囲気ガスは順次に搬入、搬出口３，４からと共に、排気管１５からも排出される。符号１３は炉内温度を制御するための熱電対であり、他の実施例ではその図示を省略した。   In the third embodiment, the atmosphere in the furnace is sent through the air supply pipe 11 that opens below the furnace chamber and the air supply pipe 11 that opens into the drum 7. As shown in FIG. 4, the atmospheric gas sent into the drum 7 is jetted into the furnace chamber from a plurality of slits 12 provided on the outer peripheral surface of the drum 7, and the binder vapor from the heated material to be heated 10. Facilitates the release of the gas into the furnace chamber. The atmospheric gas is sequentially carried in and discharged from the exhaust pipe 15 as well as from the outlets 3 and 4. Reference numeral 13 denotes a thermocouple for controlling the temperature in the furnace, and is not shown in other examples.

上記の如くにドラム７を介して雰囲気ガスを炉室内へ送る代わりに、ドラム内へ吸気管を開口して、材料１０からのバインダー蒸気等をスリット１２を介してドラム内へ吸引して、炉室内を経ずにこれらの蒸気等を直接に炉外へ排気することもできる。これも、この発明の一実施例である。この場合には、送気管１１は吸気管とする。   Instead of sending the atmospheric gas into the furnace chamber through the drum 7 as described above, an intake pipe is opened into the drum, and binder vapor or the like from the material 10 is sucked into the drum through the slit 12, and the furnace It is also possible to exhaust these vapors directly outside the furnace without going through the room. This is also one embodiment of the present invention. In this case, the air supply pipe 11 is an intake pipe.

銅の短繊維（長さ：0.2ｍｍ 直径：10μｍ）とバインダー（ＬＯＮＺＡ社製の商品名ＡｃｒａｗａｘＣ＝溶融温度140℃のエチレンビスステアロアマイド）との混合物をロール圧延・成型し、続いて脱脂した銅短繊維体シート（幅350ｍｍ:厚さ1ｍｍ: 重量4.3Ｋｇ／ｍ2：バインダー２ｗ％）１０を、図２を参照して実施例２で説明したこの発明の接触伝導加熱炉１で焼成した。 A mixture of copper short fibers (length: 0.2 mm, diameter: 10 μm) and a binder (trade name Acrawax C manufactured by LONZA = ethylene bisstearamide having a melting temperature of 140 ° C.) was roll-rolled and molded, followed by degreasing. A copper short fiber sheet (width 350 mm: thickness 1 mm: weight 4.3 kg / m 2 : binder 2 w%) 10 was fired in the contact conduction heating furnace 1 of the present invention described in Example 2 with reference to FIG. .

この焼成時の炉１の加熱・運転条件は、次の通りとした。
炉室内とドラム７内に設けられた電気チューブヒーター８で、ドラム７の外表面を９００℃に維持した。炉室内の雰囲気を窒素とし、供給管１１よりのＮ2の供給量を1.25ｍ3／ｈｒ、搬入口３と搬出口４からの排気量（バインダー蒸気を含み）を1.5ｍ3／ｈｒとした。炉内はシートの送り速度を1000ｍｍ／ｍｉｎとした。シート１０は皺も折れも無く、短時間で美麗に焼結された。炉内のＯ2濃度は６ｐｐｍ以下に保たれ、焼成された材料の表面に酸化被膜の発生は全く認められなかった。 The heating and operating conditions of the furnace 1 during the firing were as follows.
The outer surface of the drum 7 was maintained at 900 ° C. with an electric tube heater 8 provided in the furnace chamber and in the drum 7. The atmosphere in the furnace chamber is nitrogen, the supply amount of N 2 from the supply pipe 11 is 1.25 m 3 / hr, and the exhaust amount (including the binder vapor) from the carry-in port 3 and the carry-out port 4 is 1.5 m 3 / hr. . In the furnace, the sheet feeding speed was 1000 mm / min. The sheet 10 was beautifully sintered in a short time without any wrinkles or breakage. The O 2 concentration in the furnace was kept at 6 ppm or less, and no oxide film was observed on the surface of the fired material.

以上で、この発明の炉を金属繊維体シートの焼成に使用したが、かかるシートの脱脂にも利用できることは勿論であり、また、長尺で平らな炭素繊維シートの予備炭化、炭化、または黒鉛化にも利用できる。更にまた、セラミック繊維シートの脱脂または焼成にも利用できるものである。 Although the furnace of the present invention has been used for firing the metal fiber sheet, it can of course be used for degreasing such a sheet, and pre-carbonization, carbonization, or graphite of a long and flat carbon fiber sheet. It can also be used for conversion. Furthermore, it can be used for degreasing or firing ceramic fiber sheets.

本発明になる接触加熱・雰囲気炉の一例を示す説明的な縦断面図である。（実施例１）It is explanatory vertical sectional drawing which shows an example of the contact heating and atmospheric furnace which becomes this invention. (Example 1) 本発明になる接触加熱・雰囲気炉の他例を示す説明的な縦断面図である。（実施例２）FIG. 6 is an explanatory longitudinal sectional view showing another example of the contact heating / atmosphere furnace according to the present invention. (Example 2) 本発明になる接触加熱・雰囲気炉の更に他例を示す説明的な縦断面図である。（実施例３）It is explanatory vertical sectional drawing which shows the other example of the contact heating and atmospheric furnace which becomes this invention. Example 3 図３にて示される炉のドラムの一つを拡大して示す説明的な斜視図である。（実施例３）FIG. 4 is an explanatory perspective view showing, on an enlarged scale, one of the drums of the furnace shown in FIG. 3. Example 3

符号の説明Explanation of symbols

１−接触加熱・雰囲気炉の全体
２−炉室
３−被加熱処理材料の搬入口
４−被加熱処理材料の搬出口
５−断熱材
６−炉内壁
７−接触伝導加熱ドラム
８−チューブヒーター
９−ローラー
１０−被加熱処理材料
１１−雰囲気ガス送気管（吸気管）
１２−ドラムの円周面上の貫通スリット
１３−熱電対
１４−抵抗発熱電極
１５−雰囲気ガス排気管 1-Overall of contact heating / atmosphere furnace 2-furnace chamber 3-inlet of heat-treated material 4-outlet of heat-treated material 5-insulation material 6-furnace inner wall 7-contact conduction heating drum 8-tube heater 9 -Roller 10-Material to be heated 11-Atmospheric gas air supply pipe (intake pipe)
12-through slit on the circumferential surface of the drum 13-thermocouple 14-resistance heating electrode 15-atmosphere gas exhaust pipe

Claims (5)

長尺で平らな被加熱処理材料の搬入口と搬出口を有し断熱材で囲まれた炉室と、この炉室内での被加熱処理材料の移動方向と直交する軸で枢支されてこの炉室内にある回転自在な一つのドラムと、この炉室内へ雰囲気ガスを送る管とを備え、この炉室内にある該ドラムまたは炉の内壁等の炉室内の構造物の何れかの少なくとも一部が炭素質でつくられ、上記ドラムは加熱されてその外周面の一部で被加熱処理材料と接触してこの材料を所望の温度に伝導加熱することを特徴とし、かつ前記した炭素質は炉室内へもたらされる外乱の酸素を吸着してそのほとんどをCOとして炉室内または炉室外へ放出することを特徴とする長尺で平らな被加熱処理材料の接触伝導加熱炉。   A furnace chamber that has a long and flat inlet and outlet for the heat-treated material and is surrounded by a heat insulating material, and is pivotally supported by an axis perpendicular to the direction of movement of the heat-treated material in the furnace chamber. At least a part of a structure in the furnace chamber such as the drum or the inner wall of the furnace, which includes a rotatable drum in the furnace chamber and a pipe for sending atmospheric gas into the furnace chamber Is made of carbonaceous material, and the drum is heated and contacted with the material to be heated at a part of the outer peripheral surface thereof, and this material is conductively heated to a desired temperature. A long and flat contact-conduction heating furnace for heat-treated materials, characterized by adsorbing disturbance oxygen brought into the room and releasing most of it as CO into the furnace room or outside the furnace room. 前記ドラムが複数であり、材料の移動方向と直交するこれらドラムの軸が同一の水平面上で間隔をおいて互いに平行であり、材料の両面が交互にドラムの外周面の一部と接触して伝導加熱されるようにした請求項１記載の長尺で平らな被加熱処理材料の接触伝導加熱炉。   There are a plurality of drums, the axes of the drums orthogonal to the direction of material movement are parallel to each other on the same horizontal plane, and both surfaces of the material are alternately in contact with a part of the outer peripheral surface of the drum. The contact conduction heating furnace for a long and flat heat-treated material according to claim 1, wherein the heating is conducted by conduction heating. 前記ドラムがドラム内および／あるいはドラム外で炉室内に設けられた発熱体、および／あるいはドラムと摺接する電極により輻射加熱および／或いは抵抗加熱される請求項１又は２記載の長尺で平らな被加熱処理材料の接触伝導加熱炉。   3. The long and flat surface according to claim 1, wherein the drum is radiatively heated and / or resistance-heated by a heating element provided in the furnace chamber inside and / or outside the drum and / or an electrode slidingly contacting the drum. Contact conduction furnace for heat-treated materials. 雰囲気ガスが前記ドラムを介して炉室内へ送られるようにした請求項１、２又は３記載の長尺で平らな被加熱処理材料の接触伝導加熱炉。 The contact conduction heating furnace for a long and flat heat-treated material according to claim 1, 2 or 3, wherein the atmospheric gas is sent into the furnace chamber through the drum. 雰囲気ガスが前記ドラムを介して炉室外へ排気されるようにした請求項１、２又は３記載の長尺で平らな被加熱処理材料の接触伝導加熱炉。
The contact conduction heating furnace for a long and flat heat-treated material according to claim 1, 2 or 3, wherein the atmospheric gas is exhausted outside the furnace chamber through the drum.
JP2004021613A 2004-01-29 2004-01-29 Contact heating / atmosphere furnace for long and flat materials Expired - Lifetime JP4427813B2 (en)

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