JPS6364281A - Lanthanum-chromite system unit heater - Google Patents
Lanthanum-chromite system unit heaterInfo
- Publication number
- JPS6364281A JPS6364281A JP20836086A JP20836086A JPS6364281A JP S6364281 A JPS6364281 A JP S6364281A JP 20836086 A JP20836086 A JP 20836086A JP 20836086 A JP20836086 A JP 20836086A JP S6364281 A JPS6364281 A JP S6364281A
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- lanthanum
- lanthanum chromite
- furnace
- present
- 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
- NFYLSJDPENHSBT-UHFFFAOYSA-N chromium(3+);lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+3].[La+3] NFYLSJDPENHSBT-UHFFFAOYSA-N 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 17
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052863 mullite Inorganic materials 0.000 claims description 6
- LEMJVPWNQLQFLW-UHFFFAOYSA-N [La+3].[La+3].[O-][Cr]([O-])=O.[O-][Cr]([O-])=O.[O-][Cr]([O-])=O Chemical group [La+3].[La+3].[O-][Cr]([O-])=O.[O-][Cr]([O-])=O.[O-][Cr]([O-])=O LEMJVPWNQLQFLW-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はランタンクロマイト系ユニツトヒーターに関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lanthanum chromite unit heater.
ランタンクロマイト系発熱体は例えば特公昭５４−１１
５４１号公報などから明かなように既に種々の構造のも
のが提案されているが、２等従来構造のものに於ては、
その使用範囲についていくつかの制約があった。For example, the lanthanum chromite heating element is
As is clear from Publication No. 541, various structures have already been proposed, but in the conventional structure of the second class,
There were some restrictions on the scope of its use.
■ 炉材の制約
ランタンクロマイト材質は、炉材に含まれるアルカリ成
分（／Ｖａ、 Ｋ ）との反応により劣化するため、そ
の材質の選定については、Ａｌ２Ｏ３純度の高いアルカ
リ成分の少ない材質である必要性がある。■ Restrictions on furnace material Lanthanum chromite material deteriorates due to reaction with alkaline components (/Va, K) contained in the furnace material, so when selecting the material, it is necessary to select a material with high Al2O3 purity and low alkali component. There is sex.
■ 雰囲気についての制約
発熱体の導電性は、酸素を介在するホッヒンタ伝導によ
〕その導伝機構がなされておシ、使用雰囲気に酸素が存
在している必要性がちる。■ Restrictions on Atmosphere The electrical conductivity of the heating element is based on Hochnter conduction through oxygen, so it is necessary that oxygen be present in the atmosphere in which it is used.
■ 炉の設計についての制約
高温下で発熱体から飛散するＣＦ ２０ｓによる汚染を
防止するため、構造上、加熱室の被焼成物と発熱体を隔
離する必要性がある。■ Restrictions on Furnace Design In order to prevent contamination by CF20s scattered from the heating element at high temperatures, it is structurally necessary to isolate the material to be fired in the heating chamber from the heating element.
本発明はこのような従来の問題点を一トＪすることを目
的としてなされたものである。The present invention has been made with the aim of alleviating these conventional problems.
問題点を解決するための手段
本発明は、ランタンクロマイトを主成分とする発熱体と
、該発熱体の発熱部の外周部を周１！炎を存して密閉被
覆するように当該発熱体に一体結合された、ジルコニア
、アルミナ又はムライト製の保護管を具備していること
を特徴とするランタンクロマイト系ユニツトし一ターに
係る。Means for Solving the Problems The present invention provides a heating element whose main component is lanthanum chromite, and an outer circumference of the heat generating part of the heating element. The present invention relates to a lanthanum chromite-based unit characterized by comprising a protective tube made of zirconia, alumina, or mullite, which is integrally bonded to the heating element so as to contain a flame and hermetically cover the heating element.
以下に本考案の実施例を添附図面にもとづき説明すると
次の通電である。An embodiment of the present invention will be described below based on the attached drawings.
第１図は本発明の一実施例を示し）ランタンクロマイト
を主成分とする発熱体（１）（以下ランタンクロマイト
系発熱体とい５）は管状であって発熱部α０と、該発熱
部αＵの両端に接続する端子部αＪ（１’５から構成さ
れ、端子部（１２四には、電極０邊がそれぞれ取付けら
れている。図中α場は端子部亜の端部を閉塞する栓体で
、該栓体０功の材質は例えば発熱管（１）と同材質でよ
く、その他アルミナ、ムライト、ジルコニアなどの）Ｎ
人物を用いてもよい。このような発熱体（１）の？ｆ４
造そのものは、従来品と実質的に＋Ａなる所カニない。(Fig. 1 shows an embodiment of the present invention) A heating element (1) containing lanthanum chromite as a main component (hereinafter referred to as lanthanum chromite heating element 5) is tubular, and has a heating part α0 and a heating part αU. The terminal part αJ (1'5) connected to both ends has an electrode 0 attached to each terminal part (124). In the figure, the α field is a plug that closes the end of the terminal part. The material of the stopper may be, for example, the same material as the heating tube (1), or may be made of other materials such as alumina, mullite, zirconia, etc.
A person may also be used. Such a heating element (1)? f4
The construction itself is essentially a +A from the conventional product.
上記発熱体（１）の発熱部αυの外周部全周隙（２）を
存して密閉被覆するように保護管（３）が上記発熱管（
１）に結合一体化される。The protective tube (3) is connected to the heat generating tube (
1) is combined and integrated.
上記保護管（３）はアルミナ、ジルコニア又はムライト
から成形されていることが必要である。保護管（３）と
して例えば炭化けい素管、窒化けい素管などを用いると
、高温雰囲気での使用中に酸化分解されて早期に保護機
能を失なうことになるが、アルミナ、ジルコニア及びム
ライトは酸化物であって高温雰囲気中での安定性に優れ
、保ａ機能を長期間持続保持できる。もちろん保り管（
３）を溝底するアル三す、ジルコニア及びムライトはア
ルカリ成分を含有せず、ランタンクロマイト系発熱体（
１）への悪影響はない。The protective tube (3) must be made of alumina, zirconia or mullite. For example, if a silicon carbide tube or a silicon nitride tube is used as the protective tube (3), it will be oxidized and decomposed during use in a high-temperature atmosphere and will quickly lose its protective function. is an oxide and has excellent stability in high-temperature atmospheres, and can maintain its a-containing function for a long period of time. Of course storage (
3) The aluminum, zirconia, and mullite that make up the groove bottom do not contain alkali components, and are lanthanum chromite heating elements (
There is no negative impact on 1).
上記保護管（３）はその両端部に於て、スペーサを兼ね
るシール部（４）を介して発熱体（１）に結合一体化さ
れる。シール部（４）の材質は保護管（３）と同様にア
ルミナ、ジルコニア及びムライトが適当であり、また構
成材料としては、予め用足形状に成形されたブツシュ、
ファイバー及びセメントなどを単独又は併用して用いる
ことができる。The protective tube (3) is integrally connected to the heating element (1) at both ends thereof via seal portions (4) which also serve as spacers. As with the protection tube (3), suitable materials for the sealing part (4) include alumina, zirconia, and mullite, and the constituent materials include a bushing pre-shaped into a leg shape,
Fibers, cement, etc. can be used alone or in combination.
保護管（３）は、発熱体（１）の発熱部０りを炉材から
隔離するので、炉材に含まれるアルカリ成分の影響を考
える必要がなくなり、炉材として、通常一般の耐火断熱
レンガ並びに耐火断熱ボードを使用できる。而して断熱
ボードを長月した一般省エネル千−炉に本発明ユニット
し−９を適用すると、一般の耐火断熱レンガ炉に比べ、
発熱体の電力表面負荷密度を約５〜６８１１に設定する
ことができ、その結果炉の急速昇温か可能となると共に
発熱体の寿命を約２倍に延長できる。Since the protective tube (3) isolates the heat generating part of the heating element (1) from the furnace material, there is no need to consider the influence of alkaline components contained in the furnace material. Also, fireproof insulation boards can be used. Therefore, when the present invention unit 9 is applied to a general energy-saving furnace with insulation board for a long time, compared to a general fireproof insulation brick furnace,
The power surface load density of the heating element can be set to about 5 to 6811, and as a result, the furnace can be heated up rapidly and the life of the heating element can be approximately doubled.
更に保′ＩｆＩ管（３）は、発熱体（１）の発熱部Ｏυ
の外周部を密閉被覆するので、ｔＩＪ温下にて発熱部へ
りより飛散する酸化クロムの、？；気圧が抑％Ｊｌｊさ
れ、総体的に酸化りＯムの蒸散を抑ル」することができ
る、一般にランタンクロマイト系発熱体に於て、高温下
にてその素材たるランタンクロマイトより１敗する酸化
クロムが、発熱体の寿命に重大な影響を与えることはよ
く知られることであり、このようす酸化クロムの蒸散抑
制により、発熱体の寿命を、保護管を有しない従来品に
比べ約２倍に延長できる。Furthermore, the IfI pipe (3) is connected to the heating part Oυ of the heating element (1).
Since the outer periphery of the is hermetically coated, the chromium oxide that scatters from the edge of the heat generating part under tIJ temperature can be prevented. In general, lanthanum chromite-based heating elements, which can suppress the atmospheric pressure and overall suppress the evaporation of oxidized oxygen, have one more loss of oxidation than the lanthanum chromite material at high temperatures. It is well known that chromium has a significant effect on the lifespan of heating elements, and by suppressing transpiration of chromium oxide, the lifespan of heating elements can be approximately doubled compared to conventional products that do not have a protective tube. Can be extended.
更に保内管（３）と発熱体（１）の発熱部０１）との間
には周隙（２）が形成され、この周庫（２）内には、空
気（酸素）が封入され、この封入空気の存在により、発
熱体（１）は通電によシ支障なく発熱できる。而して本
発明によれば、使用算囲気面での制限がなくな力、例え
ば真空並びに各種カス雰囲気（Ｒ２，Ａｒ２゜（：０２
． Ｃｏ、 Ｎ２． Ｒ２０など）にも支障なく適用で
きる。また保頴管（３）として、特にじルコニア管を用
いた場合は、炉内の使用最高温度を従来の１８００′Ｃ
から２０００ ’Ｃ〜２２００ ”Ｃまで上昇でさる。Furthermore, a circumferential gap (2) is formed between the storage tube (3) and the heat generating part 01) of the heating element (1), and air (oxygen) is sealed in this circumferential chamber (2). Due to the presence of the enclosed air, the heating element (1) can generate heat without any trouble when energized. According to the present invention, there is no restriction on the use of surrounding air, and force such as vacuum and various gas atmospheres (R2, Ar2° (:02
．． Co, N2. R20, etc.) can be applied without any problem. In addition, when a zirconia tube is used as the yeast storage tube (3), the maximum operating temperature inside the furnace is 1800'C, which is lower than the conventional temperature.
The temperature rises from 2000'C to 2200''C.
第２図は本発明の他の実施の一例を示し、本実施例に於
ては発熱体（１）の−側部がスリットａｒ３により２つ
割部され、この２つ割部に電極（１８１）、（１３１）
が設けられている以外は、第１図に示された実施例のも
のと実質的に異なる所がない。尚本実施例に於ては、電
極（１８１）、（１８１）がスリットａ９を挾さんで瞬
り合うので、栓体（１４１）としては、絶縁性耐火物例
えばアルミナ製のものが用いられ、この栓体（１４１）
は比較的深く設けられていて、発熱体（１）内を外気か
ら完全に遮断している。スリット０９の下端には、第３
図に水源れるように螺旋状スリット（１５１）（１５１
） を１８０°位相をずらして連成するようにしても
よい。FIG. 2 shows an example of another embodiment of the present invention. In this embodiment, the negative side of the heating element (1) is divided into two parts by a slit ar3, and an electrode (181 ), (131)
There is no substantial difference from the embodiment shown in FIG. 1 except for the provision of. In this embodiment, since the electrodes (181) and (181) pinch each other with the slit a9, the stopper (141) is made of an insulating refractory material such as alumina. This plug (141)
is provided relatively deeply, completely shielding the inside of the heating element (1) from outside air. At the lower end of slit 09, there is a third
Spiral slit (151) (151)
) may be coupled with a 180° phase shift.
第２図及び第８図に示されるように、電極（１８１）（
１，３１） を、発熱体（１）の一端側に設けること
によシ、発熱体のセット方法が炉の上、下面並びとが可
能であシ更には、炉の設計に対しても容易となる。As shown in FIGS. 2 and 8, the electrode (181) (
1, 31) on one end side of the heating element (1), it is possible to set the heating element on the top or bottom of the furnace, and it is also easy to design the furnace. becomes.
以下に本発明の実験例を掲げる。Experimental examples of the present invention are listed below.
実験例１
ランタンクロマイト系発熱体（１）の外周部をアル三す
製の保護管（３）で密閉被覆した本発明ユニットヒータ
ーと、保護管（３）を有しない以外は本発明品と同一の
従来品とを、第１表の各種耐大物にて内張シした電気炉
に設置し、炉内温度１７００”ＣＸ１００ ＡＶ を１
サイクルとして発熱体が使用不能となるまでのサイクル
数（但し最高１０サイクルまで）を調べた。その結果は
第２表の通りである。Experimental Example 1 A unit heater of the present invention in which the outer periphery of the lanthanum chromite heating element (1) is hermetically covered with a protective tube (3) made of aluminum, and a product that is the same as the present invention except that it does not have the protective tube (3). The conventional product was installed in an electric furnace lined with various large-sized materials shown in Table 1, and the furnace temperature was 1700"CX100 AV.
The number of cycles (up to a maximum of 10 cycles) until the heating element became unusable was investigated. The results are shown in Table 2.
第 １ 表
第 ２ 表
第１表及び第２表から明らかなように、５１０２及びア
ルカリ成分の含有量の多い耐火物に於て、本発明品と従
来品との間に顕著な差が認められた。Table 1 Table 2 As is clear from Tables 1 and 2, there is a significant difference between the products of the present invention and the conventional products in 5102 and refractories with a high content of alkali components. Ta.
効 果
本発明ランタンクロマイト系ユニットヒーターによれば
、炉材面で−の制約や使用雰囲気面での制約がいずれも
なくなり、その適用範囲を拡大できると共に寿命を従来
品よシも２倍程度延長でき、汎用型にして耐用度のよい
この種部品を提供できる。Effects According to the lanthanum chromite unit heater of the present invention, there are no restrictions in terms of furnace material or usage atmosphere, and the range of application can be expanded, and the lifespan is approximately twice as long as that of conventional products. This makes it possible to provide this type of component that is of a general-purpose type and has good durability.
第１図は本発明の一実施例を示す一部縦断面図、第２図
及び第３図は本発明の他の実施例を示す縦断面図である
。
図に於て、（１）は発熱体、（２）は周隙、（３）は保
護管、（４）はシール部である。
（以 上）
“−一：：ノFIG. 1 is a partial longitudinal sectional view showing one embodiment of the present invention, and FIGS. 2 and 3 are longitudinal sectional views showing other embodiments of the invention. In the figure, (1) is a heating element, (2) is a circumferential gap, (3) is a protective tube, and (4) is a seal portion. (and above) “-1::ノ
Claims (1)
発熱体の発熱部の外周部を周隙を存して密閉被覆するよ
うに当該発熱体に一体結合された、ジルコニア、アルミ
ナ又はムライト製の保護管を具備していることを特徴と
するランタンクロマイト系ユニットヒーター。[1] A heating element whose main component is lanthanum chromite, and a material made of zirconia, alumina, or mullite that is integrally bonded to the heating element so as to hermetically cover the outer periphery of the heating part of the heating element with a gap in between. A lanthanum chromite unit heater characterized by being equipped with a protective tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20836086A JPS6364281A (en) | 1986-09-04 | 1986-09-04 | Lanthanum-chromite system unit heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20836086A JPS6364281A (en) | 1986-09-04 | 1986-09-04 | Lanthanum-chromite system unit heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6364281A true JPS6364281A (en) | 1988-03-22 |
Family
ID=16555001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20836086A Pending JPS6364281A (en) | 1986-09-04 | 1986-09-04 | Lanthanum-chromite system unit heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6364281A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS567995A (en) * | 1979-06-28 | 1981-01-27 | Inoue Japax Res Inc | Manufacture of heat exchanger |
| JPS5835291B2 (en) * | 1978-12-29 | 1983-08-02 | 富士通株式会社 | Automatic reset device for microprocessor runaway |
| JPS6021699B2 (en) * | 1979-08-16 | 1985-05-29 | ゼネラル・エレクトリツク・カンパニイ | Manufacturing method for reinforced epoxy structures |
-
1986
- 1986-09-04 JP JP20836086A patent/JPS6364281A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835291B2 (en) * | 1978-12-29 | 1983-08-02 | 富士通株式会社 | Automatic reset device for microprocessor runaway |
| JPS567995A (en) * | 1979-06-28 | 1981-01-27 | Inoue Japax Res Inc | Manufacture of heat exchanger |
| JPS6021699B2 (en) * | 1979-08-16 | 1985-05-29 | ゼネラル・エレクトリツク・カンパニイ | Manufacturing method for reinforced epoxy structures |
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