JPS639571Y2 - - Google Patents
Info
- Publication number
- JPS639571Y2 JPS639571Y2 JP19303683U JP19303683U JPS639571Y2 JP S639571 Y2 JPS639571 Y2 JP S639571Y2 JP 19303683 U JP19303683 U JP 19303683U JP 19303683 U JP19303683 U JP 19303683U JP S639571 Y2 JPS639571 Y2 JP S639571Y2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- ceramic
- radiant tube
- rope
- heating
- 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.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 13
- 238000000137 annealing Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011819 refractory material Substances 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
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【考案の詳細な説明】
(産業上の利用分野)
本考案は、連続焼鈍炉における鋼帯の加熱炉に
関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a heating furnace for steel strips in a continuous annealing furnace.
(従来技術)
従来鋼帯の加熱炉としては、金属製のラジアン
トチユーブを用い、該チユーブからの熱放射によ
り、走行する鋼帯を加熱せしめる方法が一般であ
つた。この加熱方式による鋼帯の受熱量Q
(Kcal/m2h)は、鋼帯の温度をTs(〓)、ラジア
ントチユーブの表面温度をTt(〓)としたとき
Q=C(T4 t−T4 s) ……(1)
で与えられる。ここにCは定数で、鋼帯の放射
率、ラジアントチユーブの寸法、配列等により定
まる。(1)式から明らかなように、鋼帯の受熱量Q
は、ラジアントチユーブの表面温度Ttが高いほ
ど大となる。換言すれば、ラジアントチユーブ表
面温度が高いほど、同じ加熱能力をもつ加熱設備
を小型化することができ、設備費も安くすること
ができる。(Prior Art) Conventionally, a metal radiant tube is used as a heating furnace for a steel strip, and a running steel strip is heated by heat radiation from the tube. Amount of heat received by the steel strip by this heating method Q
(Kcal/m 2 h) is when the temperature of the steel strip is T s (〓) and the surface temperature of the radiant tube is T t (〓).Q=C(T 4 t −T 4 s )...(1 ) is given by Here, C is a constant, which is determined by the emissivity of the steel strip, the dimensions and arrangement of the radiant tubes, etc. As is clear from equation (1), the amount of heat received by the steel strip Q
becomes larger as the surface temperature T t of the radiant tube increases. In other words, the higher the radiant tube surface temperature is, the smaller the heating equipment with the same heating capacity can be, and the lower the equipment cost can be.
さて通常のニツケルおよびクロムを含有する耐
熱鋼を用いたラジアントチユーブの場合、表面温
度はその寿命を考慮すると、1000℃以下となるよ
う設計するのが一般であつた「工業炉ハンドブツ
ク」日本工業炉協会(昭和53年7月20日、P501
〜505参照)。一方近年炭化硅素、窒化硅素等を主
成分とする高耐熱セラミツクを素材としたラジア
ントチユーブが開発されている。セラミツクの耐
熱温度は1300℃以上もあり、これを加熱炉に適用
すれば、その大巾な小型化が期待できる。 Now, in the case of a radiant tube made of ordinary heat-resistant steel containing nickel and chromium, the surface temperature is generally designed to be 1000 degrees Celsius or less, considering its lifespan. Association (July 20, 1978, P501
~505). On the other hand, in recent years, radiant tubes made of highly heat-resistant ceramics containing silicon carbide, silicon nitride, etc. as main components have been developed. Ceramic has a heat resistance temperature of over 1,300℃, and if it is applied to heating furnaces, it can be expected to be significantly smaller.
一試算例として、常温から700℃まで板厚1mm、
板巾1000mmの鋼帯を、150t/Hの加熱能力で処理
する加熱炉について、金属ラジアントチユーブ
(表面温度930℃)を用いた場合、必要加熱長は
350mであるが、セラミツクラジアントチユーブ
(表面温度1100℃)を用いた場合190mとなる。 As an example of calculation, the plate thickness is 1mm from room temperature to 700℃,
When using a metal radiant tube (surface temperature 930℃) in a heating furnace that processes steel strip with a width of 1000mm at a heating capacity of 150t/H, the required heating length is
350m, but if ceramic radiant tubes (surface temperature 1100°C) are used, it will be 190m.
セラミツクラジアントチユーブは、このように
加熱炉の大巾な小型化を可能とするものである
が、大きな難点として衝撃に弱いという問題があ
る。連続焼鈍炉では、高速で走行する鋼帯が炉内
で破断することがあり、このとき破断した鋼帯
が、セラミツクラジアントチユーブに接触し衝撃
を与え、これを破壊する事故が考えられる。 Ceramic radiant tubes make it possible to significantly downsize heating furnaces in this way, but a major drawback is that they are susceptible to impact. In a continuous annealing furnace, a steel strip running at high speed may break in the furnace, and it is conceivable that the broken steel strip may come into contact with the ceramic radiant tube and give an impact, causing it to break.
(考案の目的)
本考案は、このような不具合を解消した連続焼
鈍炉の加熱炉を提供することにある。(Objective of the Invention) The object of the invention is to provide a heating furnace for a continuous annealing furnace which eliminates such problems.
(考案の構成、作用)
本考案の要旨とするところは、セラミツクを素
材とするラジアントチユーブにより構成される鋼
帯の加熱炉において、該ラジアントチユーブと鋼
帯との間に、セラミツクフアイバーよりなる複数
本のロープを緊張せしめて配置し、鋼帯破断時鋼
帯と該ラジアントチユーブとが接触しない構造と
した点にある。(Structure and operation of the invention) The gist of the invention is that in a heating furnace for a steel strip constituted by a radiant tube made of ceramic, a plurality of ceramic fibers are arranged between the radiant tube and the steel strip. The structure is such that the rope is placed under tension so that the steel strip and the radiant tube do not come into contact when the steel strip breaks.
(実施例)
以下具体的な実施例にもとづき本考案について
説明する。(Example) The present invention will be described below based on specific examples.
第1図において、鋼帯1はハースロール2を介
して垂直方向に走行し、セラミツクラジアントチ
ユーブ群3により放射加熱される。4は本考案の
ラジアントチユーブを、鋼帯破断時の衝撃から保
護するためのロープであり、支持部材5a,5
b,……により、その両端がロープがたるまない
ように固定されている。支持部材5は金属製で、
その内部には冷却用空気を流通せしめるととも
に、外面は耐火材で被覆し、高温度の炉内で充分
な強度をもつようにする。ロープ4の鋼帯巾方向
配列ピツチとしては、300mm以下が望ましい。な
おロープ4の素材としては、高温での強度および
非酸化性を考慮すると、炭化硅素フアイバーが最
も適している。 In FIG. 1, a steel strip 1 runs vertically through hearth rolls 2 and is radiantly heated by a group of ceramic radiant tubes 3. 4 is a rope for protecting the radiant tube of the present invention from impact when the steel strip breaks, and support members 5a, 5
Both ends of the rope are fixed by b, . . . so that the rope does not slacken. The support member 5 is made of metal,
Cooling air is allowed to flow through the inside, and the outer surface is coated with a refractory material to ensure sufficient strength in the high-temperature furnace. The pitch in the width direction of the steel strips of the rope 4 is preferably 300 mm or less. Note that silicon carbide fiber is the most suitable material for the rope 4 in view of its strength at high temperatures and non-oxidizing properties.
本考案の保護ロープは、複数本の単独ロープを
張設したもののみに限られず、網状に形成した場
合も有効であり、勿論本考案の範囲に含まれる。 The protective rope of the present invention is not limited to one in which a plurality of individual ropes are stretched, but is also effective when formed into a net shape, which is of course included in the scope of the present invention.
(考案の効果)
以上述べたように本考案は、衝撃値の小さいセ
ラミツクラジアントチユーブの有効な保護技術を
提供することにより、従来の金属ラジアントチユ
ーブ炉に比較して、画期的にコンパクトな加熱設
備の実現を可能にしたもので、その産業上寄与す
るところは大である。(Effects of the invention) As described above, the present invention provides an effective protection technology for ceramic radiant tubes with a small impact value, thereby achieving a revolutionary compact heating system compared to conventional metal radiant tube furnaces. This made it possible to realize the equipment, and its contribution to industry is significant.
第1図は、本考案のロープによるセラミツクラ
ジアントチユーブ保護装置の全体図で、aは側面
図、bは正面図である。
1……鋼帯、2……ハースロール、3……セラ
ミツクラジアントチユーブ、4……セラミツクフ
アイバー製ロープ、5a,5b……ロープ支持部
材。
FIG. 1 is an overall view of the rope-based ceramic radiant tube protector of the present invention, in which a is a side view and b is a front view. DESCRIPTION OF SYMBOLS 1... Steel strip, 2... Hearth roll, 3... Ceramic radiant tube, 4... Ceramic fiber rope, 5a, 5b... Rope support member.
Claims (1)
より構成される鋼帯の連続焼鈍設備における加熱
炉において、該ラジアントチユーブと鋼帯との間
に、セラミツクフアイバーよりなる複数本のロー
プを、緊張せしめて配置したことを特徴とする連
続焼鈍設備における加熱炉。 In a heating furnace of continuous annealing equipment for steel strips consisting of radiant tubes made of ceramic material, a plurality of ropes made of ceramic fibers are placed under tension between the radiant tubes and the steel strips. A heating furnace used in continuous annealing equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19303683U JPS60102244U (en) | 1983-12-16 | 1983-12-16 | Heating furnace in continuous annealing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19303683U JPS60102244U (en) | 1983-12-16 | 1983-12-16 | Heating furnace in continuous annealing equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60102244U JPS60102244U (en) | 1985-07-12 |
JPS639571Y2 true JPS639571Y2 (en) | 1988-03-22 |
Family
ID=30415274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19303683U Granted JPS60102244U (en) | 1983-12-16 | 1983-12-16 | Heating furnace in continuous annealing equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60102244U (en) |
-
1983
- 1983-12-16 JP JP19303683U patent/JPS60102244U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS60102244U (en) | 1985-07-12 |
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