JPS6229490B2 - - Google Patents
Info
- Publication number
- JPS6229490B2 JPS6229490B2 JP4288682A JP4288682A JPS6229490B2 JP S6229490 B2 JPS6229490 B2 JP S6229490B2 JP 4288682 A JP4288682 A JP 4288682A JP 4288682 A JP4288682 A JP 4288682A JP S6229490 B2 JPS6229490 B2 JP S6229490B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- solid
- breathable
- heat treatment
- air
- 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
- 239000007787 solid Substances 0.000 claims description 36
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000001012 protector Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000011343 solid material Substances 0.000 claims description 2
- 239000003779 heat-resistant material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 15
- 239000000567 combustion gas Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910000831 Steel 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
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】
本発明は、直火無酸化加熱タイプの堅型連続熱
処理炉（以後NOFと呼び予熱炉を含む）におけ
る通気性固体壁の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure of a permeable solid wall in a direct-fire non-oxidation heating type vertical continuous heat treatment furnace (hereinafter referred to as NOF and including a preheating furnace).
一般にストリツプ材の連続熱処理炉において、
ストリツプ材は500〜700℃迄は弱酸化性雰囲気の
NOFにより加熱される。その炉温は1200〜1300
℃とされているが、従来のNOFでは炉壁面の温
度は炉温よりも100〜150℃低いと考えられ、その
ために伝熱効率には改善する余地が残されてい
る。 Generally, in a continuous heat treatment furnace for strip materials,
Strip material can be used in a weakly oxidizing atmosphere up to 500 to 700℃.
Heated by NOF. Its furnace temperature is 1200-1300
℃, but in conventional NOF, the temperature of the furnace wall surface is thought to be 100 to 150℃ lower than the furnace temperature, so there is still room for improvement in heat transfer efficiency.
第１図に従来のNOFのレイアウトを示し、ス
トリツプ１は一方の炉装入口から導入され、ハー
スロール１１によつて複数パスを形成しながら加
熱装置１２により加熱される。このような従来の
NOFでは伝達効率が悪いことから、本発明者等
は第１図の炉壁の代りに第２図に示す通気性固体
４をストリツプ材１に対面して設置し、その通気
性固体４を通して燃焼ガスを流すことにより、通
気性固体壁面と燃焼ガスの温度がほぼ等しくな
り、そのためふく射能の大きな通気性固体面から
の固体ふく射が大きくなり、従来のNOFよりも
伝熱効率を上昇させることができる。 FIG. 1 shows the layout of a conventional NOF, in which a strip 1 is introduced from one furnace charging port and heated by a heating device 12 while forming a plurality of passes with a hearth roll 11. Traditional like this
Since the transmission efficiency is poor in NOF, the present inventors installed a permeable solid 4 shown in FIG. 2 facing the strip material 1 instead of the furnace wall shown in FIG. By flowing the gas, the temperature of the permeable solid wall surface and the combustion gas become almost equal, which increases the solid radiation from the permeable solid surface with high radiation activity, making it possible to increase heat transfer efficiency compared to conventional NOF. .
一方、ストリツプ材の堅型連続熱処理炉におい
ては、ストリツプ材が破断することがあり、その
際破断したストリツプ材が通気性固体を破損させ
る恐れがある。しかしながら通気性固体はその性
質上板破断等の外力に対する強度を有しておら
ず、炉内に通気性固体を設置する構造が問題とな
る。 On the other hand, in a vertical continuous heat treatment furnace for strip material, the strip material may break, and the broken strip material may damage the air-permeable solid. However, due to its nature, the breathable solid does not have the strength to withstand external forces such as plate breakage, and the structure of installing the breathable solid in the furnace poses a problem.
本発明は以上の点に鑑み直火無酸化炉におい
て、伝熱効率を上昇させ省エネルギーを計るこ
と、NOF伝熱面構成の変化により設備長さを
短かくして設備費の低減を計ること、を目的と
し、通気性固体をNOF内に、ガス通過面積の65
％以上配置した通気性固体壁の支持を効果的にか
つストリツプの破断等の外力に対し高い強度を有
する通気性固体壁構造を得ようとするものであ
る。そして本発明の特徴は分割タイプの通気性固
体、支持パイプ、プロテクター及び通気性固体支
持枠等から構成されることにある。 In view of the above points, the present invention aims to save energy by increasing heat transfer efficiency in a direct-fired non-oxidizing furnace, and to reduce equipment costs by shortening the equipment length by changing the NOF heat transfer surface configuration. , breathable solids inside the NOF, gas passage area of 65
% or more of air permeable solid walls arranged therein, and which has a high strength against external forces such as strip breakage. A feature of the present invention is that it is composed of a split type breathable solid body, a support pipe, a protector, a breathable solid support frame, and the like.
なお、ここでいう通気性固体とは通気性と適度
の圧損を有する多孔質材のことで、金属系では発
泡金属、焼結金属等があり、耐火物系ではセラミ
ツク多孔体、ポーラスSiC、アルミナボール結合
体等のものがある。 Note that the breathable solid here refers to a porous material that has air permeability and a suitable pressure drop.Metallic materials include foamed metals and sintered metals, and refractory materials include porous ceramics, porous SiC, and alumina. There are things such as ball joints.
一般にこの種の通気性固体は多孔質であるため
通気性固体と通過ガス間の熱移動現象は粉粒体の
充填層伝熱に略近似しており、通気性固体の相当
直径が0.1〜１mm程度であれば102〜103kcal／m2ｈ
℃といつた大きな対流熱伝達係数が得られるた
め、通気性固体の表面温度は略瞬間的にガス温度
近くまで加熱（もしくは冷却）されるという特徴
を有したものである。 In general, this type of breathable solid is porous, so the heat transfer phenomenon between the breathable solid and the passing gas is approximately similar to the heat transfer in a packed bed of powder and granules, and the equivalent diameter of the breathable solid is 0.1 to 1 mm. 10 2 to 10 3 kcal/m 2 h
Since a large convective heat transfer coefficient of .degree. C. is obtained, the surface temperature of the breathable solid is almost instantaneously heated (or cooled) to near the gas temperature.
以下図によつて本発明の一実施例を説明する。 An embodiment of the present invention will be described below with reference to the drawings.
通気性固体を支持しかつ板破断等の外力を、炉
体の強度メンバーである炉穀金物に伝播させる為
に高さ方向に所定間隔ごとに、メインの支持部材
例えば支持パイプ２（以下支持パイプ２という）
を水平に設置する。このパイプ２は外面にライニ
ングされた耐火材の自重に対する曲げ剛性と、ス
トリツプ材１の破断による外力に対抗するための
充分な強度を高温の雰囲気条件下で有するもの
で、炉穀金物で支持され、外面は耐火材９でライ
ニングされる。又、この支持パイプ２は、小径で
充分な衝撃強度が必要なことから、金属パイプを
使用することが良好な効果をもたらす。又必要に
応じ、パイプ内面に空気を流すことにより冷却す
ることもできる。尚、燃焼用の空気をこの冷却用
の空気に使用することが可能である。又、支持パ
イプ２は、例えば第３図ハに示す如く単一パイプ
構造であつても、あるいは第４図ニの如く連結し
た一対パイプ構造としてもよい。 In order to support the breathable solid and to propagate external forces such as plate breakage to the furnace grain hardware, which is a strength member of the furnace body, main support members such as support pipes 2 (hereinafter referred to as support pipes) are installed at predetermined intervals in the height direction. 2)
Install it horizontally. This pipe 2 has sufficient bending rigidity against its own weight due to the refractory material lined on its outer surface and sufficient strength under high temperature atmospheric conditions to withstand the external force caused by the breakage of the strip material 1, and is supported by furnace hardware. , the outer surface is lined with refractory material 9. Further, since the support pipe 2 needs to have a small diameter and sufficient impact strength, it is advantageous to use a metal pipe. Also, if necessary, cooling can be achieved by flowing air into the inner surface of the pipe. Note that combustion air can be used as this cooling air. Further, the support pipe 2 may have a single pipe structure as shown in FIG. 3C, or a pair of connected pipes as shown in FIG. 4D, for example.
破断したストリツプ材１が、通気性固体４を損
傷させないように、どの様な板幅ストリツプ材１
の破断に対しても対処できるように、通気性固体
４の保護のためのプロテクター３−１，３−２
を、前記パイプ２の長さ方向に所定の間隔で配置
する。第３図に示すように通過する燃焼ガスの温
度が低い領域（1000℃未満）では、保護するため
のプロテクターとしては外面に耐火材を有した耐
熱鋼３−１が、第４図に示すように燃焼ガスの温
度が高い領域（1000℃以上）では、耐火煉瓦３−
２を採用した構造が考えられる。プロテクターに
は通気性固体４の支持のために溝をつけ、支持枠
を兼用させることができる。 What is the width of the strip material 1 so that the broken strip material 1 does not damage the breathable solid material 4?
Protectors 3-1 and 3-2 for protecting the breathable solid 4 so as to be able to cope with the breakage of the
are arranged at predetermined intervals in the length direction of the pipe 2. As shown in Figure 3, in the region where the temperature of the combustion gas passing through is low (less than 1000℃), heat-resistant steel 3-1 with a refractory material on the outer surface is used as a protector, as shown in Figure 4. In areas where the combustion gas temperature is high (over 1000℃), firebrick 3-
A structure adopting 2 is conceivable. The protector can be provided with grooves to support the breathable solid 4 and can also serve as a support frame.
通気性固体４を支持パイプで支持するための枠
６を中間に設ける。この枠６は通過する燃焼ガス
の温度が低い領域（1000℃未満）では金属６−１
とし、燃焼ガスの温度が高い領域（1000℃以上）
では耐火煉瓦６−２の採用が考えられる。各々の
枠は通気性固体４が破損した時、簡単に取替がで
きるよう、溝は片側が傾斜を持つた形状とする。 A frame 6 for supporting the breathable solid 4 with a support pipe is provided in the middle. This frame 6 is a metal 6-1 in an area where the temperature of the combustion gas passing through is low (less than 1000℃).
and the area where the combustion gas temperature is high (1000℃ or more)
In this case, it is conceivable to use refractory brick 6-2. Each frame has a groove with a slope on one side so that it can be easily replaced when the air permeable solid 4 is damaged.
板破断時の衝撃荷重が、支持パイプ２を介し通
気性固体４に働かないよう又枠６と通気性固体４
との熱変形差による通気性固体の破損防止のた
め、通気性固体４と枠６との間には緩衝材５を入
れる。又、通気性固体４と通気性固体４との接続
部には相互の熱変形時の影響を防ぐための枠６−
３，６−４を入れる。なお、７は炉穀、８は耐火
断熱材を示している。 The frame 6 and the air permeable solid 4 are connected so that the impact load when the plate breaks does not act on the air permeable solid 4 through the support pipe 2.
A cushioning material 5 is inserted between the breathable solid 4 and the frame 6 in order to prevent damage to the breathable solid due to the difference in thermal deformation between the breathable solid 4 and the frame 6. In addition, a frame 6- is provided at the connection portion between the air-permeable solids 4 and the air-permeable solids 4 to prevent the effects of mutual thermal deformation.
Enter 3,6-4. In addition, 7 shows the furnace grain, and 8 shows the fireproof insulation material.
以上のように本発明は連続熱処理炉においてス
トリツプ材とストリツプ材との間、あるいは炉壁
との間に高さ方向へ所定間隔をいて耐熱支持材を
配設し、この配設間に通気性固体とプロテクター
を配設し、通気性固体壁を板破断のような外力か
ら保護する構造を保有させると共に所定の大きさ
の通気性固体を安定取付け配設するものである。
したがつて、本発明は連続熱処理炉に対し通気性
固体を適用する上できわめて有用であり、その工
業的価置は非常に高い。 As described above, the present invention provides a continuous heat treatment furnace in which heat-resistant supporting materials are disposed at a predetermined interval in the height direction between strip materials or between the furnace walls, and air permeability is provided between the two strip materials. The solid body and the protector are arranged to have a structure that protects the breathable solid wall from external forces such as plate breakage, and at the same time, the breathable solid body of a predetermined size is stably attached and arranged.
Therefore, the present invention is extremely useful in applying air-permeable solids to continuous heat treatment furnaces, and its industrial value is extremely high.
第１図は従来の直火無酸化炉のレイアウトを示
す断面図、第２図は通気性固体壁を組込んだ場合
の直火無酸化炉のレイアウトを示す断面図であ
る。第３図は通過する燃焼ガスの温度が低い場合
（1000℃未満）における炉構造例を示すもので、
イは正面図、ロはイのＢ−Ｂ断面図、ハはロのａ
部詳細図、ニはイのＡ−Ａ断面図である。第４図
は燃焼ガスの温度が高い場合（1000℃以上）にお
ける炉構造例を示すもので、イは正面図、ロはイ
のＣ−Ｃ断面図、ハはロのＤ−Ｄ断面図、ニはロ
のｂ部詳細図である。
１……ストリツプ材、２……支持パイプ、３−
１，３−２……プロテクター、４……通気性固
体、５……緩衝材、６……支持枠。
FIG. 1 is a cross-sectional view showing the layout of a conventional direct-fired non-oxidation furnace, and FIG. 2 is a cross-sectional view showing the layout of a direct-fired non-oxidation furnace incorporating an air-permeable solid wall. Figure 3 shows an example of a furnace structure when the temperature of the combustion gas passing through is low (less than 1000℃).
A is a front view, B is a BB sectional view of A, C is a of B
A detailed view of the part, D is a sectional view taken along line A-A of A. Figure 4 shows an example of the furnace structure when the temperature of combustion gas is high (1000℃ or higher), where A is a front view, B is a CC sectional view of A, C is a DD sectional view of B, D is a detailed view of part b of B. 1... Strip material, 2... Support pipe, 3-
1, 3-2...protector, 4...breathable solid, 5...buffer material, 6...support frame.
Claims (1)
スを形成する連続熱処理炉内において、ストリツ
プ材とストリツプ材の間、あるいはストリツプ材
と炉壁との間に、炉壁へ固定又は取外し可能とし
た耐熱支持部材を高さ方向へ所定間隔をおいて配
列すると共に、該耐熱支持部材の長さ方向へ所定
の間隔でプロテクターを配し、この耐熱支持部材
とプロテクターとで形成した枠内に通気性固体壁
を配設したことを特徴とする連続熱処理炉の通気
性固体壁構造。1. In a continuous heat treatment furnace where metal strips pass through rolls in a continuous heat treatment furnace, a heat-resistant material that can be fixed to or removed from the furnace wall is placed between the strips or between the strips and the furnace wall. Support members are arranged at predetermined intervals in the height direction, protectors are arranged at predetermined intervals in the length direction of the heat-resistant support members, and a breathable solid material is placed within the frame formed by the heat-resistant support members and the protectors. An air permeable solid wall structure of a continuous heat treatment furnace characterized by a wall.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4288682A JPS58161729A (en) | 1982-03-19 | 1982-03-19 | Construction of air permeable solid wall for continuous heat treatment furnace |
| US06/475,489 US4494929A (en) | 1982-03-19 | 1983-03-15 | Continuous heat treatment furnace |
| FR8304794A FR2523709B1 (en) | 1982-03-19 | 1983-03-18 | CONTINUOUS HEAT TREATMENT OVEN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4288682A JPS58161729A (en) | 1982-03-19 | 1982-03-19 | Construction of air permeable solid wall for continuous heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58161729A JPS58161729A (en) | 1983-09-26 |
| JPS6229490B2 true JPS6229490B2 (en) | 1987-06-26 |
Family
ID=12648514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4288682A Granted JPS58161729A (en) | 1982-03-19 | 1982-03-19 | Construction of air permeable solid wall for continuous heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58161729A (en) |
-
1982
- 1982-03-19 JP JP4288682A patent/JPS58161729A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58161729A (en) | 1983-09-26 |
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