JPH0749185A - Electric resistance heating furnace and manufacture of electric resistance heating element - Google Patents
Electric resistance heating furnace and manufacture of electric resistance heating elementInfo
- Publication number
- JPH0749185A JPH0749185A JP19377093A JP19377093A JPH0749185A JP H0749185 A JPH0749185 A JP H0749185A JP 19377093 A JP19377093 A JP 19377093A JP 19377093 A JP19377093 A JP 19377093A JP H0749185 A JPH0749185 A JP H0749185A
- Authority
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- Japan
- Prior art keywords
- resistance heating
- heating element
- lower layer
- upper layer
- layer resistance
- 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.)
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- Crucibles And Fluidized-Bed Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電気抵抗発熱炉及び電
気抵抗発熱体の製造方法に係り、特に、加熱物の高温化
と経済性の向上とを図るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric resistance heating furnace and a method for manufacturing an electric resistance heating element, and more particularly, to increase the temperature of a heated material and improve the economical efficiency.
【０００２】[0002]
【従来の技術】炭化微粒子及び無機質耐熱材を使用して
電気抵抗発熱炉を構成する技術として、特公昭６２−３
７５１２号公報（電気抵抗発熱炉）が提案されており、
また、電気抵抗発熱体の製造方法に関わる技術として、
特公昭６２−３７５１１号公報（電気抵抗発熱体の製造
方法）が提案されている。2. Description of the Related Art As a technique for constructing an electric resistance heating furnace using carbonized fine particles and an inorganic heat resistant material, Japanese Patent Publication No. 62-3
Japanese Patent No. 7512 (electrical resistance heating furnace) has been proposed,
In addition, as a technique related to a method for manufacturing an electric resistance heating element,
Japanese Examined Patent Publication No. 62-37511 (manufacturing method of electric resistance heating element) is proposed.
【０００３】これらの技術では、炭化微粒子と、所定温
度以下では電気的に絶縁性を呈する反面所定温度以上で
は導体または半導体となるような無機質耐熱材の微粒子
とを混練焼結し、冷却後に破砕分級して得た０．１〜１
ｍｍの粉末状物が電気抵抗発熱体として利用される。そ
して、この電気抵抗発熱体を使用すれば、高温状態まで
の抵抗変化特性を緩やかにして電力制御が容易になり、
１８００〜２０００℃程度の高温を得ることができると
している。In these techniques, fine carbonized particles and fine particles of an inorganic heat-resistant material which is electrically insulating at a predetermined temperature or lower but becomes a conductor or a semiconductor at a predetermined temperature or higher are kneaded and sintered, and crushed after cooling. 0.1 to 1 obtained by classification
A powdery substance of mm is used as an electric resistance heating element. And, if this electric resistance heating element is used, the resistance change characteristic up to a high temperature state is made gentle, and power control becomes easy,
It is said that a high temperature of about 1800 to 2000 ° C. can be obtained.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上述例の電気
抵抗発熱体は、製造量が少なく比較的高価で入手しにく
くなっているとともに、製造設備として電気炉等を必要
とするため、簡単には実施できない状況下にある。However, the electric resistance heating element of the above-mentioned example is small in production amount, relatively expensive, and difficult to obtain, and requires an electric furnace or the like as a production facility. Is in a situation where it cannot be implemented.
【０００５】本発明は、このような上記事情に鑑みてな
されたもので、 ａ）例えば３０００℃程度までの加熱物の高温加熱を達
成すること ｂ）電気抵抗発熱炉を利用して電気抵抗発熱体の製造を
簡単に行なうこと ｃ）経済性を向上させること 等を目的とするものである。The present invention has been made in view of the above circumstances. A) Achieving high-temperature heating of a heated object up to about 3000 ° C. b) Electric resistance heating using an electric resistance heating furnace The purpose is to simplify the production of the body. C) Improve economic efficiency.
【０００６】[0006]
【課題を解決するための手段】本発明に係る電気抵抗発
熱炉にあっては、対をなす給電電極が対向状態に配され
る炉体と、該炉体の内部に上下に積層状態に充填される
上層用抵抗発熱体及び下層用抵抗発熱体とを具備し、上
層用抵抗発熱体は、炭化微粒子と所定温度以上で導電化
する無機質耐熱材との混練焼成材を破砕分級して得た粉
末状物であり、下層用抵抗発熱体は、木炭等を破砕分級
して得た平均粒度１ｍｍないし５ｍｍの炭素粒状物であ
る構成を採用している。加えて、上層用抵抗発熱体が、
上層用抵抗発熱体及び下層用抵抗発熱体による抵抗発熱
後におけるこれらの混合物を破砕分級して得た粉末状物
である技術が採用される。そして、本発明に係る電気抵
抗発熱体の製造方法にあっては、炉体の内部に配した対
をなす給電電極に給電して、その間に介在する請求項１
記載の上層用抵抗発熱体及び下層用抵抗発熱体を抵抗発
熱させ、その冷却後にこれらの混合物を破砕分級して粉
末状物を選別する構成を採用している。加えて、上記の
方法で製造した抵抗発熱体を上層用抵抗発熱体とすると
ともに、請求項１記載の下層用抵抗発熱体とによる抵抗
発熱により、電気抵抗発熱体を繰り返し製造する技術が
採用される。SUMMARY OF THE INVENTION In an electric resistance heating furnace according to the present invention, a furnace body in which paired power supply electrodes are arranged to face each other, and the inside of the furnace body are stacked in a vertically stacked state. The resistance heating element for upper layer and the resistance heating element for lower layer are provided, and the resistance heating element for upper layer is obtained by crushing and classifying a kneading and firing material of carbonized fine particles and an inorganic heat-resistant material which becomes conductive at a predetermined temperature or higher. The lower layer resistance heating element is a powdery material, and the lower layer resistance heating element is a carbon particulate material having an average particle size of 1 mm to 5 mm obtained by crushing and classifying charcoal or the like. In addition, the upper layer resistance heating element,
A technique which is a powdery material obtained by crushing and classifying a mixture of these after resistance heating by the upper layer resistance heating element and the lower layer resistance heating element is employed. In the method for manufacturing an electric resistance heating element according to the present invention, power is supplied to a pair of power supply electrodes arranged inside the furnace body and is interposed therebetween.
The resistance heating element for the upper layer and the resistance heating element for the lower layer described above are resistance-heated, and after cooling, the mixture is crushed and classified to select a powdery material. In addition, the resistance heating element manufactured by the above method is used as the upper layer resistance heating element, and the technique of repeatedly manufacturing the electric resistance heating element by resistance heating with the lower layer resistance heating element according to claim 1 is adopted. It
【０００７】[0007]
【作用】給電電極への通電により上層用抵抗発熱体及び
下層用抵抗発熱体がそれぞれ発熱するが、高温領域にあ
っては、下層用抵抗発熱体の電気抵抗の低下が著しくな
ることに基づいて、下層部分の発熱量が多くなる。この
場合に上層用抵抗発熱体は、その粒子が小さく設定され
ていることに加えて、無機質耐熱材が含まれていること
により、下層用抵抗発熱体の放熱や揮発による消費を抑
制して炉内の温度上昇の限度を引き上げる。高温下の通
電状態においては、上層用抵抗発熱体と下層用抵抗発熱
体との間で、溶解、混合、拡散現象が生じて、上層用抵
抗発熱体に含まれている無機質耐熱材の一部が、下層用
抵抗発熱体に取り込まれる。抵抗発熱後には、全抵抗発
熱体が揮発分の発生等によって消費された分だけ減量す
るが、全量を取り出して混合し、混合物を破砕分級して
得た粉末状物中には、当初の無機質耐熱材が残される。
したがってこれを上層用抵抗発熱体として再利用する
と、当初に準じる性能を発揮する。加えて、新規の下層
用抵抗発熱体に再利用した上層用抵抗発熱体を加えて、
抵抗発熱させる工程を複数回繰り返しても、当初の無機
質耐熱材が大部分残され、初期性能を有する抵抗発熱体
が製造される。The upper layer resistance heating element and the lower layer resistance heating element each generate heat when electricity is supplied to the power supply electrode. However, in the high temperature region, the lower layer resistance heating element is remarkably reduced in electric resistance. The amount of heat generated in the lower layer increases. In this case, in the upper layer resistance heating element, the particles are set to be small, and in addition to the inclusion of the inorganic heat-resistant material, the lower layer resistance heating element suppresses heat dissipation and consumption due to volatilization, and Raise the limit of temperature rise inside. In the energized state at high temperature, melting, mixing, and diffusion phenomena occur between the upper layer resistance heating element and the lower layer resistance heating element, and a part of the inorganic heat-resistant material contained in the upper layer resistance heating element. Are taken into the lower layer resistance heating element. After resistance heating, the total resistance heating element is reduced by the amount consumed due to the generation of volatile components, etc., but the total amount was taken out and mixed, and the mixture was crushed and classified. Heat resistant material is left behind.
Therefore, when this is reused as the resistance heating element for the upper layer, the performance equivalent to the original is exhibited. In addition, by adding the upper layer resistance heating element reused to the new lower layer resistance heating element,
Even if the process of resistance heating is repeated a plurality of times, most of the initial inorganic heat-resistant material remains, and a resistance heating element having initial performance is manufactured.
【０００８】[0008]
【実施例】以下、本発明に係る電気抵抗発熱炉及び電気
抵抗発熱体の製造方法の一実施例について、図１及び図
２基づいて説明する。図１において、符号１は給電電
極、２は炉体、３は上層用抵抗発熱体、４は下層用抵抗
発熱体、５は電源、６は電力制御部、７は焼成容器（る
つぼ）、Ｘは被焼成体である。EXAMPLES An example of an electric resistance heating furnace and a method of manufacturing an electric resistance heating element according to the present invention will be described below with reference to FIGS. 1 and 2. In FIG. 1, reference numeral 1 is a power supply electrode, 2 is a furnace body, 3 is an upper layer resistance heating element, 4 is a lower layer resistance heating element, 5 is a power source, 6 is a power control unit, 7 is a firing container (crucible), and X is a unit. Is an object to be fired.
【０００９】前記給電電極１は、炉体２の内部側方等に
対向状態に対をなすように複数配され、黒鉛棒等によっ
て形成される。A plurality of the power supply electrodes 1 are arranged so as to be opposed to each other on the inner side of the furnace body 2 or the like, and are formed of graphite rods or the like.
【００１０】前記炉体２は、円筒状等の所望形状をなす
断熱壁２ａと、該断熱壁２ａを囲む外壁２ｂと、焼成容
器７や両抵抗発熱体３，４の搬入搬出を行なうための開
口部２ｃを有している。The furnace body 2 is for carrying in and out a heat insulating wall 2a having a desired shape such as a cylindrical shape, an outer wall 2b surrounding the heat insulating wall 2a, a firing container 7 and both resistance heating elements 3 and 4. It has an opening 2c.
【００１１】前記上層用抵抗発熱体３は、前述した特公
昭６２−３７５１１号公報に掲載されている電気抵抗発
熱体、つまり、炭化微粒子と所定温度以上で導電化する
無機質耐熱材との混練焼成材を破砕分級して得た粉末状
物等とされる。The upper layer resistance heating element 3 is an electric resistance heating element described in Japanese Patent Publication No. 62-37511, that is, kneading and firing of carbonized fine particles and an inorganic heat-resistant material which becomes conductive at a predetermined temperature or higher. A powdery material obtained by crushing and classifying the material is used.
【００１２】前記下層用抵抗発熱体４は、例えば硬質の
木炭を破砕分級して得た平均粒度１ｍｍないし５ｍｍの
炭素粒状物、あるいは同等のものであり、この場合の粒
度は、上層用抵抗発熱体３よりも相対的に十分に小さく
設定される。The lower layer resistance heating element 4 is, for example, carbon granules having an average particle size of 1 mm to 5 mm obtained by crushing and classifying hard charcoal, or the equivalent, and the particle size in this case is the upper layer resistance heating element. It is set to be sufficiently smaller than the body 3.
【００１３】前記電源５は、例えば交流２００ボルトの
商用交流電源が利用され、必要に応じて電圧調整装置や
変圧器等を具備する電力制御部６によって、給電電力
（電圧及び電流）が適宜に制御される。The power source 5 is, for example, a commercial AC power source of 200 V AC, and the power control unit 6 including a voltage adjusting device, a transformer and the like appropriately supplies power (voltage and current). Controlled.
【００１４】前記焼成容器７は、黒鉛るつぼや石英るつ
ぼ等が適用され、被焼成体Ｘの焼成温度によって適宜選
定される。A graphite crucible, a quartz crucible, or the like is applied to the firing container 7, which is appropriately selected depending on the firing temperature of the article X to be fired.
【００１５】以下、このように構成されている電気抵抗
発熱炉によって、被焼成体Ｘの加熱焼成及び電気抵抗発
熱体の製造を実施した例について説明する。Hereinafter, an example in which the object X to be fired is heated and fired and the electric resistance heating element is manufactured by the electric resistance heating furnace configured as described above will be described.
【００１６】図１及び図２のＳ１に示すように、前述の
ように粒度を調整した比較的大粒の下層用抵抗発熱体４
を炉体２内部に例えば半分ほど投入し、かつ、焼成容器
７を装填した。As shown by S1 in FIGS. 1 and 2, the lower layer resistance heating element 4 having a relatively large grain size adjusted as described above.
Was charged into the furnace body 2, for example, about half, and the firing container 7 was loaded.
【００１７】図２のＳ２に示すように、微粒子状態の上
層用抵抗発熱体３を炉体２内部に投入し、下層用抵抗発
熱体４の上を隙間なくかつ厚く覆った。As shown in S2 of FIG. 2, the upper layer resistance heating element 3 was charged into the furnace body 2 to cover the lower layer resistance heating element 4 thickly with no space.
【００１８】高温焼成しようとするかき殻、蟹殻等の被
焼成体Ｘを、概略上層用抵抗発熱体３の高さに合わせて
焼成容器７に投入した。A material X to be fired, such as an oyster shell or a crab shell to be fired at a high temperature, was placed in a firing container 7 in a manner substantially matching the height of the upper resistance heating element 3.
【００１９】電源５及び電力制御部６を作動させて、給
電電極１への給電を開始し、図２のＳ３に示すように、
上層用抵抗発熱体３及び下層用抵抗発熱体４を抵抗発熱
させて高温状態に導いた。この場合の温度は、本発明者
の計測例によれば、上層用抵抗発熱体３及び下層用抵抗
発熱体４を約半々ずつ組み合わせて大気中で抵抗発熱さ
せた場合、被焼成体Ｘからの蒸気発生等が少なくなった
焼結終期に、焼成容器７の近傍温度が約３０００℃に達
した。このような高温領域にあっては、下層用抵抗発熱
体４の部分の温度が相対的に高くなる現象が現れたが、
この理由は、下層用抵抗発熱体４の方が、高温領域で電
気抵抗が著しく小さくなることに基づいて、発熱量が多
くなるためと考えられる。また、上層用抵抗発熱体３は
粒子径が小さく、加えて外気が炉体２の開口部２ｃから
下層用抵抗発熱体４に達することが少なく、下層用抵抗
発熱体４の放熱が遮断されるとともに、ガス放出も抑制
されて気化熱による冷却がなされないためと考えられ
る。The power supply 5 and the power control unit 6 are operated to start power supply to the power supply electrode 1, and as shown in S3 of FIG.
The resistance heating element 3 for the upper layer and the resistance heating element 4 for the lower layer were resistance-heated to reach a high temperature state. According to the measurement example of the present inventor, the temperature in this case is measured from the object X to be fired when the upper layer resistance heating element 3 and the lower layer resistance heating element 4 are combined by about half each and the resistance heating is performed in the atmosphere. At the final stage of sintering when the generation of steam was reduced, the temperature in the vicinity of the firing container 7 reached about 3000 ° C. In such a high temperature region, a phenomenon that the temperature of the lower layer resistance heating element 4 becomes relatively high appears.
It is considered that the reason is that the lower layer resistance heating element 4 has a larger amount of heat generation because the electric resistance is significantly reduced in the high temperature region. In addition, the upper layer resistance heating element 3 has a small particle size, and in addition, the outside air rarely reaches the lower layer resistance heating element 4 through the opening 2c of the furnace body 2, and the lower layer resistance heating element 4 is radiated. At the same time, it is considered that the gas release is suppressed and the cooling due to the heat of vaporization is not performed.
【００２０】また、上層用抵抗発熱体３及び下層用抵抗
発熱体４への抵抗発熱途中では、抵抗発熱体自身からガ
ス成分が放出されて量が減少する傾向が現れた。両抵抗
発熱体３，４を再利用するために、図２のＳ４に示すよ
うに、ガス成分の放出及び燃焼炎がほぼ消滅するまで、
引き続き抵抗発熱を継続する両抵抗発熱体３，４の予備
焼結を行なった。Further, during resistance heating to the upper layer resistance heating element 3 and the lower layer resistance heating element 4, there was a tendency that a gas component was released from the resistance heating element itself and the amount thereof decreased. In order to reuse both resistance heating elements 3 and 4, as shown in S4 of FIG. 2, until the gas components are released and the combustion flame is almost extinguished,
Both resistance heating elements 3 and 4 which continue resistance heating were pre-sintered.
【００２１】次いで、図２のＳ５に示すように、電源５
及び電力制御部６の作動を停止して、両抵抗発熱体３，
４を冷却した。Next, as shown in S5 of FIG.
And the operation of the power control unit 6 is stopped, and both resistance heating elements 3,
4 was cooled.
【００２２】冷却した両抵抗発熱体３，４は、図２のＳ
６に示すように、両者を十分に攪拌してむらなく混合し
た。Both of the cooled resistance heating elements 3 and 4 are indicated by S in FIG.
As shown in 6, both were thoroughly stirred and mixed evenly.
【００２３】混合した抵抗発熱体は、炉体２の内部にお
いて両給電電極１の間に山形に盛り上げた状態にして、
図２のＳ７及びＳ８に示すように、再び抵抗加熱して約
２０００℃の温度で焼結を行なった。この場合にあって
も、短時間の間、抵抗発熱体自身からガス成分が少量放
出され、燃焼炎が観測された。ただし、前述のＳ４の工
程よりも量的には著しく少なかった。高温下の通電状態
においては、上層用抵抗発熱体３及び下層用抵抗発熱体
４の一部が溶解する現象や、化学成分が拡散する現象が
生じるが、両抵抗発熱体３，４を混合した状態で加熱焼
結すると、その際に、上層用抵抗発熱体３に含まれてい
る無機質耐熱材の一部が、下層用抵抗発熱体４に取り込
まれるものと考えられる。The mixed resistance heating element is piled up between the two feeding electrodes 1 inside the furnace body 2,
As shown in S7 and S8 of FIG. 2, resistance heating was performed again and sintering was performed at a temperature of about 2000 ° C. Even in this case, a small amount of gas component was released from the resistance heating element itself for a short time, and a combustion flame was observed. However, it was significantly smaller in quantity than the above-mentioned step S4. In the energized state at high temperature, a phenomenon in which part of the upper layer resistance heating element 3 and the lower layer resistance heating element 4 is dissolved and a phenomenon in which chemical components are diffused occur, but both resistance heating elements 3 and 4 are mixed. When heat-sintered in the state, it is considered that at that time, a part of the inorganic heat-resistant material contained in the upper layer resistance heating element 3 is taken into the lower layer resistance heating element 4.
【００２４】再焼結を行なった抵抗発熱体は、図２のＳ
９に示すように、再び冷却してほぼ常温状態まで戻し
た。The resistance heating element subjected to the re-sintering is S in FIG.
As shown in FIG. 9, the sample was cooled again and returned to a room temperature state.
【００２５】再焼結した抵抗発熱体を炉体２から取り出
して微粒子状に粉砕し、ふるいに掛けることにより、平
均粒径が０．１〜１ｍｍ程度の微粒子状となったものの
みを分級選別した。The re-sintered resistance heating element is taken out of the furnace body 2, pulverized into fine particles, and sieved to classify only fine particles having an average particle size of 0.1 to 1 mm. did.
【００２６】なお、かき殻、蟹殻等の被焼成体Ｘを焼成
したものは、カルシウム成分のみが残された状態となっ
た。The calcined material X such as oyster shells and crab shells was in a state where only the calcium component remained.
【００２７】図２に破線の矢印で示すように、分級選別
した抵抗発熱体を使用して、Ｓ１ないしＳ１０の工程を
繰り返した。抵抗発熱体の再利用時の最高到達温度は、
３０００℃よりも若干低くなる傾向を示したものの、２
０００℃よりも遥かに高い温度、例えば２５００℃以上
となった。この場合にあって、新規の無機質耐熱材を含
む抵抗発熱体を補給することなく、抵抗発熱体を製造す
る工程を順次繰り返したところ、徐々に高温加熱が困難
な状況となった。As shown by the broken line arrow in FIG. 2, the steps S1 to S10 were repeated using the classified resistance heating elements. The maximum temperature reached when the resistance heating element is reused is
Although it tended to be slightly lower than 3000 ° C, 2
The temperature was much higher than 000 ° C, for example 2500 ° C or higher. In this case, when the steps of manufacturing the resistance heating element were sequentially repeated without replenishing the resistance heating element containing the new inorganic heat-resistant material, the high temperature heating gradually became difficult.
【００２８】したがって、抵抗発熱体の再利用時の繰り
返し回数は、数回程度にとどめるか、新規の無機質耐熱
材を含む抵抗発熱体を少しずつ補給するかの方法により
対処できると結論づけられる。Therefore, it can be concluded that the number of times the resistance heating element is reused can be limited to several times or the resistance heating element containing the new inorganic heat-resistant material can be replenished little by little.
【００２９】[0029]
【発明の効果】本発明に係る電気抵抗発熱炉及び電気抵
抗発熱体の製造方法によれば、以下の効果を奏する。 （１） 無機質耐熱材を含みかつ微粒子状の上層用抵抗
発熱体で下層用抵抗発熱体を覆って、下層用抵抗発熱体
の部分の抵抗発熱量を大きくすることにより、高温化を
容易にし、３０００℃程度までの高温加熱を達成するこ
とができる。 （２） 抵抗発熱に使用した上層用抵抗発熱体及び下層
用抵抗発熱体が溶解混合拡散し易い性質と、電気抵抗発
熱炉とを利用して、被焼成体の焼成工程とともに電気抵
抗発熱体の製造を簡単に行なうことができる。 （３） 一度使用した上層用抵抗発熱体に含まれる無機
質耐熱材を、下層用抵抗発熱体に取り込んで再利用する
ことにより、コスト低減を図り経済性を向上させること
ができる。The electric resistance heating furnace and the method for manufacturing the electric resistance heating element according to the present invention have the following effects. (1) By covering the lower layer resistance heating element with a fine particle resistance heating element containing an inorganic heat-resistant material and increasing the resistance heating value of the lower layer resistance heating element, it is possible to easily raise the temperature. High temperature heating up to about 3000 ° C. can be achieved. (2) Utilizing the property that the upper layer resistance heating element and the lower layer resistance heating element used for resistance heating easily dissolve, mix, and diffuse, and the electric resistance heating furnace is used to perform the firing process of the object to be fired and the electrical resistance heating element It can be easily manufactured. (3) By incorporating the inorganic heat-resistant material contained in the upper layer resistance heating element that has been used once into the lower layer resistance heating element and reusing it, cost reduction and economic efficiency can be improved.
【図１】本発明に係る電気抵抗発熱炉の一実施例を示す
正断面図である。FIG. 1 is a front sectional view showing an embodiment of an electric resistance heating furnace according to the present invention.
【図２】図１に示す電気抵抗発熱炉を利用した電気抵抗
発熱体の製造工程例のフローチャートである。2 is a flowchart of an example of a manufacturing process of an electric resistance heating element using the electric resistance heating furnace shown in FIG.
１ 給電電極 ２ 炉体 ２ａ 断熱壁 ２ｂ 外壁 ２ｃ 開口部 ３ 上層用抵抗発熱体 ４ 下層用抵抗発熱体 ５ 電源 ６ 電力制御部 ７ 焼成容器（るつぼ） Ｘ 被焼成体 1 Power Supply Electrode 2 Furnace Body 2a Heat Insulation Wall 2b Outer Wall 2c Opening 3 Upper Layer Resistance Heating Element 4 Lower Layer Resistance Heating Element 5 Power Supply 6 Power Control Section 7 Firing Container (Crucible) X Firing Object
Claims (4)
される炉体（２）と、該炉体の内部に上下に積層状態に
充填される上層用抵抗発熱体（３）及び下層用抵抗発熱
体（４）とを具備し、上層用抵抗発熱体は、炭化微粒子
と所定温度以上で導電化する無機質耐熱材との混練焼成
材を破砕分級して得た粉末状物であり、下層用抵抗発熱
体は、木炭等を破砕分級して得た平均粒度１ｍｍないし
５ｍｍの炭素粒状物であることを特徴とする電気抵抗発
熱炉。1. A furnace body (2) in which paired power supply electrodes (1) are arranged to face each other, and an upper layer resistance heating element (3) which is vertically stacked inside the furnace body. The lower layer resistance heating element (4) is provided, and the upper layer resistance heating element is a powdery material obtained by crushing and classifying a kneaded and fired material of carbonized fine particles and an inorganic heat-resistant material that becomes conductive at a predetermined temperature or higher. The electric resistance heating furnace, wherein the resistance heating element for the lower layer is a carbon granular material having an average particle size of 1 mm to 5 mm obtained by crushing and classifying charcoal or the like.
発熱体及び下層用抵抗発熱体（４）による抵抗発熱後に
おけるこれらの混合物を破砕分級して得た粉末状物であ
ることを特徴とする請求項１記載の電気抵抗発熱炉。2. The upper layer resistance heating element (3) is a powdery substance obtained by crushing and classifying a mixture of the upper layer resistance heating element and the lower layer resistance heating element (4) after resistance heating. The electric resistance heating furnace according to claim 1, wherein:
電極（１）に給電して、その間に介在する請求項１記載
の上層用抵抗発熱体（３）及び下層用抵抗発熱体（４）
を抵抗発熱させ、その冷却後にこれらの混合物を破砕分
級して粉末状物を選別することを特徴とする電気抵抗発
熱体の製造方法。3. The upper layer resistance heating element (3) and the lower layer resistance heating (3) according to claim 1, wherein a pair of feeding electrodes (1) arranged inside the furnace body (2) are fed with power and are interposed therebetween. Body (4)
Resistance heating, and after cooling, the mixture is crushed and classified to select a powdery material, and a method for producing an electric resistance heating element is characterized.
体を上層用抵抗発熱体とするとともに、請求項１記載の
下層用抵抗発熱体とによる抵抗発熱により、電気抵抗発
熱体を繰り返し製造することを特徴とする電気抵抗発熱
体の製造方法。4. The resistance heating element manufactured by the method according to claim 3 is used as the resistance heating element for the upper layer, and the resistance heating element with the resistance heating element for the lower layer according to claim 1 repeatedly manufactures the electric resistance heating element. A method of manufacturing an electric resistance heating element, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19377093A JP2506552B2 (en) | 1993-08-04 | 1993-08-04 | Electric resistance heating furnace and method for manufacturing electric resistance heating element using the heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19377093A JP2506552B2 (en) | 1993-08-04 | 1993-08-04 | Electric resistance heating furnace and method for manufacturing electric resistance heating element using the heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0749185A true JPH0749185A (en) | 1995-02-21 |
| JP2506552B2 JP2506552B2 (en) | 1996-06-12 |
Family
ID=16313521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19377093A Expired - Fee Related JP2506552B2 (en) | 1993-08-04 | 1993-08-04 | Electric resistance heating furnace and method for manufacturing electric resistance heating element using the heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506552B2 (en) |
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| DE102006020234A1 (en) * | 2006-04-27 | 2007-10-31 | Deutsche Solar Ag | Furnace for non-metal melting |
| CN102401562A (en) * | 2010-09-13 | 2012-04-04 | 方强 | Furnace body based on electroconductive intra-furnace member, and resistor furnace |
| CN102519264A (en) * | 2011-08-18 | 2012-06-27 | 西安奥杰电热设备工程有限责任公司 | Triple-element pitch-T heater for aviation resistance furnace |
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1993
- 1993-08-04 JP JP19377093A patent/JP2506552B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7423242B2 (en) | 2006-04-27 | 2008-09-09 | Deutsche Solar Ag | Oven for non-metal melting |
| DE102006020234A1 (en) * | 2006-04-27 | 2007-10-31 | Deutsche Solar Ag | Furnace for non-metal melting |
| CN102401562A (en) * | 2010-09-13 | 2012-04-04 | 方强 | Furnace body based on electroconductive intra-furnace member, and resistor furnace |
| CN102767946A (en) * | 2011-05-04 | 2012-11-07 | 上海浔兴拉链制造有限公司 | Zinc furnace |
| CN102519264A (en) * | 2011-08-18 | 2012-06-27 | 西安奥杰电热设备工程有限责任公司 | Triple-element pitch-T heater for aviation resistance furnace |
| CN103822488A (en) * | 2012-11-19 | 2014-05-28 | 江苏华东炉业有限公司 | Novel welding-free electricity conducting rod for heating furnace |
| CN103438708A (en) * | 2013-09-02 | 2013-12-11 | 太仓子午电气有限公司 | Smelting furnace for copper silver composite processing |
| CN103759542A (en) * | 2014-02-18 | 2014-04-30 | 朱建新 | Combined type direct-heating resistance furnace |
| CN103759542B (en) * | 2014-02-18 | 2015-12-09 | 朱建新 | Combined vertical thermal resistance stove |
| CN105783528A (en) * | 2016-04-27 | 2016-07-20 | 苏州汇科机电设备有限公司 | Heating element structure for glue discharging and sintering combined furnace for sintering electronic elements |
| CN105783528B (en) * | 2016-04-27 | 2018-07-31 | 苏州汇科机电设备有限公司 | A kind of heating element structure of the dumping and sintered combination stove of sintering electronic component |
| CN105953445A (en) * | 2016-05-20 | 2016-09-21 | 哈尔滨工业大学 | Miniature high-temperature molten salt electric heating system |
| CN105953445B (en) * | 2016-05-20 | 2018-05-11 | 哈尔滨工业大学 | Micro high-temperature fuse salt electric heating system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2506552B2 (en) | 1996-06-12 |
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