JPH0229592A - High temperature atmosphere furnace - Google Patents
High temperature atmosphere furnaceInfo
- Publication number
- JPH0229592A JPH0229592A JP17996788A JP17996788A JPH0229592A JP H0229592 A JPH0229592 A JP H0229592A JP 17996788 A JP17996788 A JP 17996788A JP 17996788 A JP17996788 A JP 17996788A JP H0229592 A JPH0229592 A JP H0229592A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- brick layer
- lining material
- graphite brick
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 22
- 239000010439 graphite Substances 0.000 claims abstract description 22
- 239000011449 brick Substances 0.000 claims abstract description 18
- 150000001639 boron compounds Chemical class 0.000 claims abstract description 5
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 5
- 239000004917 carbon fiber Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は高温雰囲気炉の改良に関し、さらに詳しくは
炉内面側の高熱伝導性黒鉛レンガ層と裏面側の高断熱性
黒鉛レンガ層とでなる内張り材を内張り施工してなる高
温雰囲気炉に関する６（従来の技ｖ＃）
従来、ニューセラミックスなどの焼結に用いられる常圧
焼結炉あるいはホットプレス炉などの高温雰囲気炉は、
主として第１図に示すように、内張り材２ａを施工した
炉体１ａの内部外周沿いに配設されたカーボンヒーター
３ａ及び炉内の試料ケース４ａなどから構成されている
。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to the improvement of a high-temperature atmosphere furnace, and more specifically, the invention relates to the improvement of a high-temperature atmosphere furnace, and more specifically, it is composed of a highly thermally conductive graphite brick layer on the inner surface side of the furnace and a highly insulating graphite brick layer on the back side. 6. Concerning high-temperature atmosphere furnaces that are lined with lining materials (conventional techniques v#) Conventionally, high-temperature atmosphere furnaces such as atmospheric pressure sintering furnaces or hot press furnaces used for sintering new ceramics, etc.
As shown in FIG. 1, it mainly consists of a carbon heater 3a disposed along the inner periphery of a furnace body 1a on which a lining material 2a has been constructed, a sample case 4a inside the furnace, and the like.
そしてこの高温雰囲気炉は、その被焼物にもよるが、Ｎ
２ ＃ Ａ ｒなとの不活性ガス雰囲気中で炉内温度
が１６００℃以上の高温下にて使用される。Although this high-temperature atmosphere furnace depends on the object to be burned, N
It is used at a high furnace temperature of 1600° C. or higher in an inert gas atmosphere such as 2 #Ar.
そこでこれらの条件下にて使用される内張り材は３００
０℃以上でも安定して存在できる炭素材料以外にはない
。かつ炉内を効率的に高温に保つためには断熱性に優れ
ていることが条件となり、従来は断熱材のカーボンファ
イバーフェルトが内張り材２ａとして使用されている。Therefore, the lining material used under these conditions is 300
There is no other material other than carbon material that can exist stably even above 0°C. In addition, in order to efficiently maintain the inside of the furnace at a high temperature, it is necessary to have excellent heat insulation properties, and carbon fiber felt, which is a heat insulating material, has conventionally been used as the lining material 2a.
（発明が解決しようとする問題点）
しかるに従来使用されているカーボンファイバーフェル
トは、高温時での安定性及び断熱性において有効な材料
であるが、断熱性が高いということは熱伝導率が低いと
いうことである。（−殻内にカーボンファイバーフェル
トの品質は表１のようである。）
そして使用面側の熱伝導率が悪いと炉内各部分への熱伝
達はヒータ一部分からの放射及び炉内に存在する気体を
通してのみとなる。ところがこれらの熱伝達はヒーター
自体の温度バラツキ、ヒーターから処理物までの距離な
どに非常に多くの影響を受けるものである。そして実際
の炉内温度は例えば第３図における炉体１内の中心上部
より５０ｍ＋毎の各測定場所■〜［相］における各測定
炉内中心部温度を示した表２でわかるように■〜■の位
置においても３５℃のバラツキを持っている。(Problem to be solved by the invention) However, conventionally used carbon fiber felt is an effective material in terms of stability and heat insulation properties at high temperatures, but high heat insulation properties mean that it has low thermal conductivity. That's what it means. (-The quality of the carbon fiber felt inside the shell is as shown in Table 1.) If the thermal conductivity of the use side is poor, heat transfer to each part of the furnace will be due to radiation from one part of the heater and the presence inside the furnace. Only through gas. However, these heat transfers are greatly affected by temperature variations in the heater itself, the distance from the heater to the object to be processed, and so on. The actual temperature inside the furnace is, for example, as shown in Table 2, which shows the temperature at the center of the furnace at each measurement location 50m+ from the upper center of the furnace body 1 in Figure 3. There is also a variation of 35°C at the position (2).
しかしセラミックスなどの焼結では、その熱収縮がたい
へんに大きいなどの点から処理物の温度バラツキをシビ
アーに管理する必要がある。However, in the case of sintering ceramics, it is necessary to strictly control the temperature variation of the processed material because the thermal contraction is very large.
そこで現在これが対応策として、炉内に高熱伝導性黒鉛
ケースをセットし、その中に処理物を入れている。これ
は炉内の熱伝達をヒーターから一度黒鉛ケースに伝達し
、ケース壁内にて温度を均一化し、その均−熱にて処理
物に熱伝達する方策である。Currently, as a countermeasure, a highly thermally conductive graphite case is set inside the furnace and the processed material is placed inside the case. This is a measure to transfer heat within the furnace from the heater to the graphite case, equalize the temperature within the case wall, and use the uniform heat to transfer heat to the processed material.
しかしこの方策は処理物を必ず黒鉛ケース内に入れなけ
ればならず、かつ処理物は炉内寸法よりかなり小さいも
のしか処理できないという問題点を持っている。However, this method has the problem that the object to be treated must be placed inside the graphite case, and the object to be treated must be much smaller than the size inside the furnace.
（問題点を解決するための手段）
この発明は上記問題点を解決するためになされたもので
あって次のように構成されている。(Means for Solving the Problems) The present invention has been made to solve the above problems, and is constructed as follows.
即ちこの発明は、炉内面側をホウ素化合物の添加された
黒鉛質レンガ層として裏面側を嵩比重０．５以下、熱伝
導率０ 、３ ｋｃａｌ／ｍ、ｈｒ．℃以下の性質をも
つ黒鉛質レンガ層とした内張り材が内張り施工されてな
る炉体を構成したことを特徴とする高温雰囲気炉である
。That is, in this invention, the inner surface of the furnace is made of a graphite brick layer to which a boron compound is added, and the back surface is made of a graphite brick layer with a bulk specific gravity of 0.5 or less, a thermal conductivity of 0.3 kcal/m, and an hr. This is a high-temperature atmosphere furnace characterized by having a furnace body lined with a lining material made of a graphite brick layer having a property of not more than ℃.
次にこの発明の高温雰囲気炉を図面第２図について鮮明
する。Next, the high temperature atmosphere furnace of the present invention will be clearly explained with reference to FIG.
１は、炉内にカーボンヒーター３の配設された炉体であ
る。また２は、炉内面側をホウ素化合物の添加された黒
鉛質レンガ層５として裏面側を嵩比重０．５以下、熱伝
導率０ 、３ ｋｃａｌ／ｍ、ｈｒ、Ｔ：以下の性質を
もつ黒鉛質レンガ層６とした内張り材である。そしてこ
の発明は、上記構成の内張り材２が内張り施工されて炉
体１を構成したことを特徴とするものである。1 is a furnace body in which a carbon heater 3 is disposed. In addition, 2 has a graphite brick layer 5 added with a boron compound on the inner surface of the furnace, and graphite with the following properties: bulk specific gravity 0.5 or less, thermal conductivity 0.3 kcal/m, hr, T: This is a lining material with 6 layers of quality brick. The present invention is characterized in that the furnace body 1 is constructed by lining the lining material 2 having the above structure.
実 施 例
コークス粉末（平均粒径２０μｍ）８０部とＢ４Ｃ粉末
（平均粒径ｌＯμ醜）２０部をピッチにて加熱混合した
原料を油圧プレスにて１００ Ｘ ｌｏｏｍの金型を用
い１ ｔｏｎ／ｃｄの圧力にて厚み１０■の板を成形し
た。・・・・・・・・・・・・０
次にコークス粉末（平均粒径２■）１００部に対し外か
けで３０部のピッチにて加熱混合した原料を作成した。Example A raw material prepared by heating and mixing 80 parts of coke powder (average particle size 20μm) and 20 parts of B4C powder (average particle size 1Oμm) at a pitch was heated to 1 ton/cd using a hydraulic press using a 100X room mold. A plate with a thickness of 10 cm was molded at a pressure of . ......0 Next, a raw material was prepared by heating and mixing 100 parts of coke powder (average particle size: 2 cm) at a pitch of 30 parts.
・・・・・・・・・・・・■そして■にて成形した板を
再度１００ Ｘ １１００ａの金型中に入れ、その上部
に■にて作成した原料を投入し、１００℃にてｌ ）ｃ
ｇ／ｃｄの圧力で加熱成形−体化し、１２００℃で仮焼
成し、２４００℃にて本焼成を行って２層黒鉛レンガの
内張り材を得た。・・・・・・・・・・・・■Then, the plate formed in step 2 was placed again into a 100 x 1100a mold, the raw material prepared in step 2 was placed on top of it, and the plate was heated at 100°C. )c
The material was heat-molded at a pressure of g/cd, pre-fired at 1200°C, and main fired at 2400°C to obtain a two-layer graphite brick lining material.
この時の各材質の物性を表１に示す。Table 1 shows the physical properties of each material at this time.
表 １
次に上記方法にて製造した２層黒鉛レンガの内張り材（
炉内面側材質厚み１０ａ、裏面側材質厚み５５ｍａ＋）
を炉内径φ５００ｍの円筒型高温雰囲気炉に内張り施工
した。Table 1 Next, the lining material of the two-layer graphite brick manufactured by the above method (
Furnace inner side material thickness 10a, back side material thickness 55ma+)
A cylindrical high-temperature atmosphere furnace with an inner diameter of φ500 m was lined.
施工厚み
本発明材（２ＷＪ黒鉛レンガ） ６５ｍ・・・ ａカ
ーボンファイバーフェルト ６５ｍ・・・ ｂ（比較例
１）
使用ヒーターは均熱長２５０ｍのものを炉中心より２０
０ｍ５の位置に円周上１２本配置した。Construction thickness Inventive material (2WJ graphite brick) 65 m... a Carbon fiber felt 65 m... b (Comparative example 1) The heater used has a soaking length of 250 m and is 20 m from the center of the furnace.
Twelve pieces were placed on the circumference at a position of 0 m5.
また比較例２としてカーボンファイバーフェルト施工炉
の中心にφ１５０ ｘ Ｈ２ＳＯの黒鉛ケースをセツト
した。Further, as Comparative Example 2, a graphite case of φ150 x H2SO was set in the center of a carbon fiber felt construction furnace.
そして第３図における炉内中心上部より５０ｍ毎の各測
定場所■〜［相］の炉内温度は表２のようであった。Table 2 shows the temperature in the furnace at each measurement location ① to [phase] every 50 m from the upper center of the furnace in FIG.
この表２によって本発明を使用した場合の炉内温度は、
■〜■の位置において１０℃のバラツキにおさえること
ができることがわかる。According to Table 2, the furnace temperature when using the present invention is:
It can be seen that the variation can be suppressed to 10° C. in the positions ① to ②.
（発明の効果）
内張り材の炉内面側は熱伝導率が高いため、ヒーターを
含めて炉内全体が均一温度になるもので、これは従来使
用されている黒鉛ケース内部の状況が炉内全体に拡大で
きるものであり、処理物の大きさも炉内寸法に近い大型
のものまで処理可能となる。(Effect of the invention) Since the inside of the furnace inner surface of the lining material has high thermal conductivity, the entire inside of the furnace including the heater has a uniform temperature. It can be expanded to a large size, and it is possible to process large objects that are close to the size of the inside of the furnace.
また本発明材（内張り材）は酸化開始温度が７００℃と
たいへんに高く、その温度以下では、はとんど酸化消耗
がないため内張り材の寿命を大幅に伸ばすことができる
。In addition, the material of the present invention (lining material) has a very high oxidation starting temperature of 700° C. Below that temperature, there is almost no oxidation consumption, so the life of the lining material can be greatly extended.
すなおちこの発明の高温雰囲気炉は、従来のものに比べ
、均熱ゾーン内での温度バラツキの減少、均熱部分の拡
大がはかれると同時に炉の内張り材の寿命延長をもはか
ることができる。In other words, compared to conventional furnaces, the high temperature atmosphere furnace of the present invention can reduce temperature variations within the soaking zone, expand the heat soaking area, and at the same time extend the life of the furnace lining material.
第１図は従来の高温雰囲気炉の断面図、第２図はこの発
明高温雰囲気炉の断面図、第３図は炉内中心部各測温場
所の位置を示した説明図である。
１．１ａ・・・炉体、２，２ａ・・・内張り材、３．３
ａ・・・カーボンヒーター、４ａ・−・試料ケース、５
，６・・・黒鉛質レンガ層
特許出願人 明智セラミックス株式会社代理人 弁理
士 大 矢 須 和 夫第
図
１・炉体
２ 内張り材
５．６・・・黒鉛賀レンガ層FIG. 1 is a sectional view of a conventional high-temperature atmosphere furnace, FIG. 2 is a sectional view of the high-temperature atmosphere furnace of the present invention, and FIG. 3 is an explanatory diagram showing the positions of temperature measurement locations in the center of the furnace. 1.1a...furnace body, 2,2a...lining material, 3.3
a...Carbon heater, 4a...Sample case, 5
, 6...Graphite brick layer Patent applicant Akechi Ceramics Co., Ltd. Agent Patent attorney Kazuo Oyasu Figure 1 Furnace body 2 Lining material 5.6...Graphite brick layer
Claims (1)
して裏面側を嵩比重０．５以下、熱伝導率０．３ｋｃａ
ｌ／ｍ．ｈｒ．℃以下の性質をもつ黒鉛質レンガ層とし
た内張り材が内張り施工されて炉体を構成したことを特
徴とする高温雰囲気炉。The inner surface of the furnace is a graphite brick layer added with a boron compound, and the back surface has a bulk specific gravity of 0.5 or less and a thermal conductivity of 0.3 kca.
l/m. hr. A high-temperature atmosphere furnace characterized in that a furnace body is constructed by lining the lining material with a graphite brick layer having properties of a temperature below ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17996788A JPH0229592A (en) | 1988-07-19 | 1988-07-19 | High temperature atmosphere furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17996788A JPH0229592A (en) | 1988-07-19 | 1988-07-19 | High temperature atmosphere furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0229592A true JPH0229592A (en) | 1990-01-31 |
Family
ID=16075108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17996788A Pending JPH0229592A (en) | 1988-07-19 | 1988-07-19 | High temperature atmosphere furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0229592A (en) |
-
1988
- 1988-07-19 JP JP17996788A patent/JPH0229592A/en active Pending
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