JPH04270886A - Electric furnace - Google Patents
Electric furnaceInfo
- Publication number
- JPH04270886A JPH04270886A JP5404691A JP5404691A JPH04270886A JP H04270886 A JPH04270886 A JP H04270886A JP 5404691 A JP5404691 A JP 5404691A JP 5404691 A JP5404691 A JP 5404691A JP H04270886 A JPH04270886 A JP H04270886A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- refractory
- electric
- atmosphere
- ceiling
- 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.)
- Granted
Links
- 238000005485 electric heating Methods 0.000 claims description 19
- 239000011819 refractory material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910020968 MoSi2 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は例えば高酸素濃度炉のよ
うな雰囲気式の電気炉の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an atmospheric electric furnace such as a high oxygen concentration furnace.
【０００２】0002
【従来の技術】上記のような雰囲気式の電気炉において
は、電気発熱体を炉内に設置すると急速に劣化が進行し
て短時間で使用ができなくなる。このため、従来は被焼
成物搬送路の上下を耐火物製の仕切板により炉体内部か
ら区切り、この区切られた発熱体室に水平に電気発熱体
を設置し、耐火物製の仕切板を介して被焼成物を加熱焼
成していた。2. Description of the Related Art When an electric heating element is installed in the atmosphere-type electric furnace as described above, it rapidly deteriorates and becomes unusable in a short period of time. For this reason, conventionally, the upper and lower parts of the conveyance path for the materials to be fired are separated from the inside of the furnace body using refractory partition plates, and an electric heating element is installed horizontally in this partitioned heating element chamber. The object to be fired was heated and fired through the furnace.
【０００３】ところがこのような従来の電気炉は被焼成
物の高さが高い場合には上下方向の温度分布の不均一が
大きくなり、均一な焼成が行えない欠点があった。また
構造的に仕切板の厚さが厚くなり、これを通して発熱体
室から炉内の被焼成物に熱伝導により熱が伝えられるた
め、熱効率が悪くなる欠点があった。更に発熱体室の容
積が増え、またいずれかの電気発熱体を交換する必要の
ある場合には炉内雰囲気を乱し易いという欠点があった
。However, such conventional electric furnaces have the disadvantage that when the height of the object to be fired is high, the uneven temperature distribution in the vertical direction becomes large and uniform firing cannot be performed. In addition, the thickness of the partition plate is increased structurally, and heat is transferred from the heating element chamber to the object to be fired in the furnace by conduction through the partition plate, resulting in poor thermal efficiency. Furthermore, the volume of the heating element chamber increases, and if any of the electric heating elements needs to be replaced, the atmosphere inside the furnace is likely to be disturbed.
【０００４】0004
【発明が解決しようとする課題】本発明は上記したよう
な従来の問題点を解決して、被焼成物の高さが高い場合
にも均一な温度分布が得られ、また熱効率がよく、電気
発熱体を交換する場合の炉内雰囲気の乱れを減少させる
ことができる電気炉を提供するために完成されたもので
ある。[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional problems, and provides uniform temperature distribution even when the height of the object to be fired is high. This was completed in order to provide an electric furnace that can reduce the disturbance of the atmosphere inside the furnace when replacing the heating element.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、炉体内部の被焼成物搬送路の両
側に、上端が炉体の天井を貫通する耐火物製の筒を所定
間隔で設置し、その内部に電気発熱体を垂直に吊り下げ
たことを特徴とするものである。以下に本発明を図示の
実施例によって更に詳細に説明する。[Means for Solving the Problems] The present invention, which has been made to solve the above problems, provides refractory cylinders whose upper ends penetrate through the ceiling of the furnace body, on both sides of the conveyance path for the materials to be fired inside the furnace body. are installed at predetermined intervals, and an electric heating element is vertically suspended inside the heating elements. The present invention will be explained in more detail below with reference to illustrated embodiments.
【０００６】[0006]
【実施例】図１、図２において、１は天井２、側壁３、
炉底４とから構成される炉体、５は炉室、６は被焼成物
搬送路である。被焼成物搬送路６は被焼成物７を耐火物
製の支持板８の上に載せて炉体１の長手方向に移動させ
るためのもので、その下側に冷却用の空洞部９を形成し
てある。また炉室５の内部は高濃度酸素雰囲気に保たれ
ている。[Example] In FIGS. 1 and 2, 1 indicates a ceiling 2, a side wall 3,
The furnace body is composed of a furnace bottom 4, 5 is a furnace chamber, and 6 is a conveyance path for the materials to be fired. The object conveying path 6 is for moving the object 7 to be fired in the longitudinal direction of the furnace body 1 by placing it on a support plate 8 made of refractory material, and has a cooling cavity 9 formed below it. It has been done. Further, the inside of the furnace chamber 5 is maintained in a highly concentrated oxygen atmosphere.
【０００７】このような炉体内部の被焼成物搬送路６の
両側には、所定間隔で耐火物製の筒１０が設置されてい
る。これらの耐火物製の筒１０はその上端が炉体１の天
井２を貫通するように設けられたもので、上部はフラン
ジ付きのれんが１２により封止されている。これらの耐
火物製の筒１０は例えばアルミナ系耐火物やナイトライ
ド系耐火物により成形されたものであるが、長い筒を一
体成形することが困難である場合には、図示のように筒
１０を複数の部分からなるものとし、各部分の継目の部
分をリング状耐火物１３を介して接続することが好まし
い。このような構造としておけば、熱膨張による変形を
緩和できる効果がある。[0007] Refractory tubes 10 are installed at predetermined intervals on both sides of the article conveyance path 6 inside the furnace body. These refractory cylinders 10 are provided so that their upper ends penetrate through the ceiling 2 of the furnace body 1, and the upper ends are sealed with flanged bricks 12. These refractory tubes 10 are made of, for example, alumina-based refractories or nitride-based refractories, but if it is difficult to integrally mold a long tube, the tubes 10 may be molded as shown in the figure. It is preferable that the refractory is made up of a plurality of parts, and the joints of each part are connected via a ring-shaped refractory 13. Such a structure has the effect of alleviating deformation due to thermal expansion.
【０００８】上記したような耐火物製の筒１０の内部に
は、それぞれ電気発熱体１４が垂直に吊り下げられてい
る。実施例では電気発熱体１４として、酸化雰囲気中で
１４００〜１５００℃の発熱が可能なＭｏＳｉ２ が使
用されている。この電気発熱体１４はＵ字状のものであ
って、その上端部を筒１０の上端から突出させて炉体１
の天井２の上面のチャック１５に支持させてある。なお
チャック１５の周囲にもカバー１６を被せて炉内雰囲気
の漏れを防止してある。Electric heating elements 14 are vertically suspended inside each of the refractory tubes 10 as described above. In the embodiment, MoSi2, which can generate heat at 1400 to 1500°C in an oxidizing atmosphere, is used as the electric heating element 14. This electric heating element 14 has a U-shape, and its upper end protrudes from the upper end of the cylinder 10 so that it can be attached to the furnace body.
It is supported by a chuck 15 on the upper surface of the ceiling 2. A cover 16 is also placed around the chuck 15 to prevent the atmosphere inside the furnace from leaking.
【０００９】[0009]
【作用】このように構成された本発明の電気炉は、炉室
５の内部を例えば高濃度酸素雰囲気とするとともに、電
気発熱体１４に通電して炉内を１４００〜１５００℃ま
で加熱したうえ、被焼成物７を耐火物製の支持板８の上
に載せて被焼成物搬送路６に沿って移動させつつ焼成を
行わせるものであることは従来のこの種の電気炉と同様
である。[Function] The electric furnace of the present invention configured as described above creates, for example, a high-concentration oxygen atmosphere inside the furnace chamber 5, and heats the inside of the furnace to 1400 to 1500°C by energizing the electric heating element 14. This furnace is similar to the conventional electric furnace of this type in that the object to be fired 7 is placed on a support plate 8 made of refractory material and fired while being moved along the object conveyance path 6. .
【００１０】しかし本発明の電気炉は、耐火物製の筒１
０の内部に電気発熱体１４を垂直に吊り下げてあるので
、従来のように電気発熱体を水平に配置したものに比較
して炉室５内の温度分布が均一となり、被焼成物７の高
さが高い場合にも温度むらのない均一焼成が可能となる
。また電気発熱体１４は上端が炉体１の天井２を貫通す
る耐火物製の筒１０の内部に配置されているので、仮に
いずれかの電気発熱体１４を交換する必要が生じた場合
には、炉の外側からフランジ付きのれんが１２を上方へ
引き抜いて電気発熱体１４の交換が可能である。しかも
このときに炉内の雰囲気は筒１０により遮断されている
のでほとんど炉外へ洩れることがない。従って電気発熱
体１４を交換する際の炉内雰囲気の乱れを最小限に抑え
ることができる。However, the electric furnace of the present invention has a cylinder 1 made of refractory material.
Since the electric heating element 14 is vertically suspended inside the furnace chamber 5, the temperature distribution in the furnace chamber 5 is uniform compared to the conventional electric heating element arranged horizontally, and the temperature distribution of the object 7 to be fired is uniform. Uniform firing without temperature unevenness is possible even when the height is high. Furthermore, since the electric heating elements 14 are arranged inside a refractory cylinder 10 whose upper end penetrates the ceiling 2 of the furnace body 1, if it becomes necessary to replace any of the electric heating elements 14, The electric heating element 14 can be replaced by pulling the flanged brick 12 upward from outside the furnace. Moreover, at this time, since the atmosphere inside the furnace is blocked by the cylinder 10, there is almost no leakage to the outside of the furnace. Therefore, disturbance of the atmosphere in the furnace when replacing the electric heating element 14 can be minimized.
【００１１】更に本発明の電気炉においては、電気発熱
体１４は筒１０により炉内の雰囲気から遮断されている
ので、電気発熱体１４の劣化を最小限に止めることがで
き、その使用寿命を延長することができる。Furthermore, in the electric furnace of the present invention, since the electric heating element 14 is isolated from the atmosphere in the furnace by the tube 10, deterioration of the electric heating element 14 can be minimized and its service life can be extended. Can be extended.
【００１２】0012
【発明の効果】本発明は以上に説明したように、被焼成
物の高さが高い場合にも均一な温度分布が得られるうえ
、従来のような厚い耐火物製の仕切板を必要としないの
で、熱効率を高めることができる。更に本発明によれば
、電気発熱体を交換する場合の炉内雰囲気の乱れを減少
させることができる。このように本発明の電気炉は特に
高酸素濃度炉のような雰囲気炉として優れたものであり
、産業の発展に寄与するところはきわめて大きいものが
ある。[Effects of the Invention] As explained above, the present invention can obtain uniform temperature distribution even when the height of the object to be fired is high, and does not require thick partition plates made of refractory material as in the past. Therefore, thermal efficiency can be increased. Furthermore, according to the present invention, it is possible to reduce disturbances in the atmosphere within the furnace when replacing the electric heating element. As described above, the electric furnace of the present invention is particularly excellent as an atmospheric furnace such as a high oxygen concentration furnace, and can greatly contribute to the development of industry.
【図１】本発明の実施例を示す炉幅方向の断面図である
。FIG. 1 is a sectional view in the furnace width direction showing an embodiment of the present invention.
【図２】本発明の実施例を示す炉の長手方向の断面図で
ある。FIG. 2 is a longitudinal sectional view of a furnace showing an embodiment of the present invention.
１ 炉体 ２ 天井 ６ 被焼成物搬送路 １０ 耐火物製の筒 １３ リング状耐火物 １４ 電気発熱体 1 Furnace body 2 Ceiling 6 Sintered material conveyance path 10 Refractory cylinder 13 Ring-shaped refractory 14 Electric heating element
Claims (2)
、上端が炉体１の天井２を貫通する耐火物製の筒１０を
所定間隔で設置し、その内部に電気発熱体１４を垂直に
吊り下げたことを特徴とする電気炉。1. Refractory cylinders 10 whose upper ends penetrate the ceiling 2 of the furnace body 1 are installed at predetermined intervals on both sides of the conveyance path 6 for the materials to be fired inside the furnace body, and electric heating elements 14 are installed inside the cylinders 10 made of refractory material and whose upper ends penetrate through the ceiling 2 of the furnace body 1 . An electric furnace characterized by vertically suspended electric furnaces.
り、かつ各部分の継目の部分がリング状耐火物１３によ
り接続されたものであることを特徴とする請求項１に記
載の電気炉。2. The electrical appliance according to claim 1, wherein the refractory cylinder 10 is composed of a plurality of parts, and the joints of each part are connected by a ring-shaped refractory 13. Furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3054046A JPH07117343B2 (en) | 1991-02-25 | 1991-02-25 | Electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3054046A JPH07117343B2 (en) | 1991-02-25 | 1991-02-25 | Electric furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04270886A true JPH04270886A (en) | 1992-09-28 |
| JPH07117343B2 JPH07117343B2 (en) | 1995-12-18 |
Family
ID=12959664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3054046A Expired - Lifetime JPH07117343B2 (en) | 1991-02-25 | 1991-02-25 | Electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07117343B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6438874U (en) * | 1987-09-03 | 1989-03-08 |
-
1991
- 1991-02-25 JP JP3054046A patent/JPH07117343B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6438874U (en) * | 1987-09-03 | 1989-03-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07117343B2 (en) | 1995-12-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960604 |