JPS645964B2 - - Google Patents
Info
- Publication number
- JPS645964B2 JPS645964B2 JP5755482A JP5755482A JPS645964B2 JP S645964 B2 JPS645964 B2 JP S645964B2 JP 5755482 A JP5755482 A JP 5755482A JP 5755482 A JP5755482 A JP 5755482A JP S645964 B2 JPS645964 B2 JP S645964B2
- Authority
- JP
- Japan
- Prior art keywords
- slab
- combustion
- temperature
- heating chamber
- heat
- 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
- 238000010438 heat treatment Methods 0.000 claims description 65
- 238000002485 combustion reaction Methods 0.000 claims description 37
- 230000005855 radiation Effects 0.000 claims description 29
- 230000001737 promoting effect Effects 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims description 2
- 239000000567 combustion gas Substances 0.000 description 23
- 238000005098 hot rolling Methods 0.000 description 17
- 239000011449 brick Substances 0.000 description 10
- 238000009749 continuous casting Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、鋳片の端部加熱装置に関するもの
であつて、一層詳細には連続鋳造設備において連
続鋳造されたスラブ、ビレツト等の鋳片を引続き
熱間圧延設備に移送して圧延を行うに当り、該熱
間圧延設備への移送途中において前記鋳片の温度
降下し易い端部を加熱し、熱間圧延に適した温度
にまで再昇温させるよう構成した熱効率の良好な
鋳片の端部加熱装置に関するものである。Detailed Description of the Invention "Industrial Field of Application" The present invention relates to a device for heating the end of a slab, and more particularly to a device for heating slabs, billets, etc. continuously cast in continuous casting equipment. When the slab is subsequently transferred to a hot rolling facility for rolling, the end portion of the slab where the temperature tends to drop is heated during the transfer to the hot rolling facility, and the temperature is re-heated to a temperature suitable for hot rolling. The present invention relates to an end heating device for a slab having good thermal efficiency and configured to raise the temperature.
「従来技術」
連続鋳造設備において、溶融金属から直接連続
的に鋳造生産されるスラブ、ビレツト等の鋳片
は、鋳造時の高温が未だ保持されている状態のう
ちに熱間圧延設備に移送して熱間圧延を行うのが
省エネルギーの見地から望ましく、このように連
続鋳造工程に引続いて鋳片を熱間圧延する連続圧
延方法が近時広く採用されるに至つている。``Prior art'' In continuous casting equipment, slabs, billets, etc. that are continuously cast directly from molten metal are transferred to hot rolling equipment while the high temperature during casting is still maintained. From the viewpoint of energy saving, it is desirable to hot-roll the cast slab after the continuous casting process, and a continuous rolling method in which the slab is hot-rolled following the continuous casting process has recently been widely adopted.
「発明が解決しようとする課題」
ところで、鋳片の熱間圧延を行うためには、熱
間圧延設備における該鋳片の材料温度は一般に
1000℃以上に均一に均熱されていることが要求さ
れるが、鋳片は連続鋳造設備からこの熱間圧延設
備まで搬送されて来る間に部分的に失熱して温度
降下を生じ、そのままでは直接熱間圧延をなし得
ない。例えば、第1図に示すように厚さ200mm、
幅1600mmの連鋳スラブを想定すると、該鋳片10
が連続鋳造設備から搬送されて熱間圧延設備にま
で到来した時点での鋳片温度分布は図示の通りで
あつて、幅方向の端部a及び隅角部bでの温度
Ta,Tbや鋳片の上面中央部温度Tcは、中心温
度Tdに比べて低下しており、このままでは直接
熱間圧延に供するには不適当な温度条件となつて
いる。そこで従来は、連続鋳造設備と熱間圧延設
備との間にガス加熱装置や誘導加熱装置を併設
し、鋳片の前記温度降下し易い端部を再加熱して
熱間圧延に適する温度にまで昇温させる手段が採
用されているが、前者は単にバーナを鋳片端面に
臨ませた構造が多く、伝熱効率が悪いため燃料コ
ストが嵩み、後者は比較的熱効率は良いが設備費
が非常に高くなるという難点があつた。"Problem to be Solved by the Invention" By the way, in order to hot-roll a slab, the material temperature of the slab in the hot rolling equipment is generally
It is required that the slab be uniformly heated to over 1000℃, but while the slab is transported from the continuous casting equipment to this hot rolling equipment, it partially loses heat and the temperature drops, and if it is not heated as it is, Direct hot rolling is not possible. For example, as shown in Figure 1, the thickness is 200mm,
Assuming a continuously cast slab with a width of 1600 mm, the slab 10
The temperature distribution of the slab at the time when it is transported from the continuous casting equipment and reaches the hot rolling equipment is as shown in the figure, and the temperature at the end a and corner b in the width direction is
Ta, Tb, and the temperature Tc at the center of the upper surface of the slab are lower than the center temperature Td, and the temperature conditions are unsuitable for direct hot rolling as it is. Conventionally, therefore, a gas heating device or an induction heating device was installed between the continuous casting equipment and the hot rolling equipment to reheat the ends of the slab, where the temperature tends to drop, to a temperature suitable for hot rolling. Methods for raising the temperature are used, but the former often has a structure in which the burner simply faces the end face of the slab, resulting in poor heat transfer efficiency and high fuel costs, while the latter has relatively good thermal efficiency but requires very high equipment costs. The problem was that it was expensive.
「発明の目的」
本発明に係る鋳片の端部加熱装置は、前記の難
点に鑑みこれを克服するべく案出されたものであ
つて、極めて良好な熱効率でもつて鋳片の温度降
下し易い端部域を重点的に加熱して、該鋳片を熱
間圧延に適する温度まで急速に昇温させることが
でき、しかも設備面積も僅かで足りる省エネルギ
ー指向の鋳片端部加熱装置を提供することを目的
とする。``Object of the Invention'' The end heating device for a slab according to the present invention has been devised to overcome the above-mentioned difficulties, and is capable of easily reducing the temperature of a slab even with extremely good thermal efficiency. To provide an energy saving oriented slab end heating device capable of rapidly raising the temperature of the slab to a temperature suitable for hot rolling by intensively heating the end region, and requiring only a small equipment area. With the goal.
「課題を解決するための手段」
この目的を達成するため本発明に係る鋳片の端
部加熱装置は、多数配設したローラ上を搬送され
る長尺の鋳片の温度降下し易い長手方向両端部を
走行自在に囲繞的に包挟可能で、かつ該鋳片の横
幅寸法に適合させるべく相互に接近離間自在に対
向配置した1対の加熱ブロツク内に、前記鋳片の
長手方向端縁部に指向するバーナを配設して1対
の燃焼加熱室を構成し、
前記各燃焼加熱室における前記鋳片の温度降下
し易い両端部の走行領域の上方及び下方に、通気
性固体からなる輻射促進板を夫々配設したことを
特徴とする。"Means for Solving the Problem" In order to achieve this object, the end heating device for a slab according to the present invention is provided in the longitudinal direction where the temperature of a long slab that is conveyed on a large number of rollers is likely to drop. The longitudinal edges of the slab are placed in a pair of heating blocks which can surround both ends so as to be freely movable and are arranged facing each other so as to be able to approach and move away from each other in order to match the width dimension of the slab. A pair of combustion heating chambers are formed by arranging burners oriented toward the respective combustion heating chambers, and above and below the traveling areas of the slab at both ends where the temperature of the slab tends to drop in each combustion heating chamber is made of a breathable solid material. A feature is that a radiation promoting plate is provided respectively.
この場合、前記燃焼加熱室の上部及び下部輻射
促進板により画成される領域に、耐火性材料から
なる火炎分流板を配設するようにすれば、鋳片角
部の加熱が促進できるので一層好適である。 In this case, if a flame distribution plate made of a fire-resistant material is arranged in the area defined by the upper and lower radiation promoting plates of the combustion heating chamber, the heating of the corners of the slab can be further promoted. suitable.
「実施例」
次に、本発明に係る鋳片の端部加熱装置につ
き、好適な実施例を挙げて添付図面を参照しなが
ら以下詳細に説明する。Embodiments Next, a preferred embodiment of the slab end heating device according to the present invention will be described in detail with reference to the accompanying drawings.
第2図は本発明に係る端部加熱装置の概略的な
全体構造を示す斜視図であつて、この加熱装置は
図示しない連続鋳造設備以降に配設した切断装置
と熱間圧延設備との間の鋳片搬送ラインに設置さ
れる。すなわち、連続鋳造設備で連続生産された
鋳片10(ここではスラブ)は、軸受12に両端
部を枢支され適宜の動力源により回転駆動される
ローラ14に担持されて矢印方向へ搬送されてい
る。該鋳片10の幅方向に、接近・離間自在に構
成した1対の加熱ブロツク16,16から成る本
発明装置が配設され、かつこの装置は鋳片10の
搬送方向に複数基順次設置するのが好ましい。前
記加熱ブロツク16は、第3図に明確に示すよう
に、鋳片10の搬送方向に対し直角に敷設したレ
ール18上を車輪20を介して移動可能な台車2
2と、この台車22に載設したバーナパネル24
とから基本的に構成される。このバーナパネル2
4は適宜の補強を付した鋼製の殻体からなり、該
殻体内部に断面略コ字状のキヤビテイを形成した
耐火物炉壁26の内張りが施されている。前記耐
火物炉壁26のキヤビテイ、すなわち空洞部は燃
焼加熱室28として構成され、該燃焼加熱室28
の1方の炉壁側部に放射型バーナ32が配設され
ている。このバーナ32は、第2図及び第4図に
示すように複数基(本実施例では3個)配設され
る。 FIG. 2 is a perspective view showing a schematic overall structure of an end heating device according to the present invention, and this heating device is installed between a cutting device and hot rolling equipment installed after continuous casting equipment (not shown). installed on the slab conveyance line. That is, a slab 10 (slab here) continuously produced in a continuous casting facility is carried in the direction of the arrow by a roller 14 whose both ends are supported by bearings 12 and which is rotationally driven by an appropriate power source. There is. A device of the present invention consisting of a pair of heating blocks 16, 16 configured to be able to approach and move away from each other is disposed in the width direction of the slab 10, and a plurality of this device are sequentially installed in the conveying direction of the slab 10. is preferable. As clearly shown in FIG. 3, the heating block 16 is a trolley 2 movable via wheels 20 on rails 18 laid at right angles to the direction of conveyance of the slab 10.
2, and a burner panel 24 mounted on this trolley 22.
It basically consists of. This burner panel 2
Reference numeral 4 consists of a steel shell with appropriate reinforcement, and inside the shell is lined with a refractory furnace wall 26 forming a cavity with a substantially U-shaped cross section. The cavity of the refractory furnace wall 26 is configured as a combustion heating chamber 28.
A radiant burner 32 is disposed on one side of the furnace wall. A plurality of burners 32 (three in this embodiment) are provided as shown in FIGS. 2 and 4.
前記燃焼加熱室28の開口部には、第3図に明
確に示すように鋳片10の温度降下のし易い端部
が適当距離だけ水平に侵入して、該加熱室28の
加熱ゾーンにより抱挾されるようになつている。
従つて、この燃焼加熱室28の開口周縁部には、
前記鋳片10と燃焼加熱室28との間の空隙を極
力減少させるために絞り部を形成するテーパを付
しておくのが望ましい。更に前記燃焼加熱室28
には、該室中に臨む鋳片10を基準としてその上
方及び下方に、夫々所謂通気性固体からなる上部
輻射促進板34及び下部輻射促進板36を水平に
配設固定し、前記各輻射促進板34,36の端部
間は第4図に示すように耐熱性絶縁板38,38
で連結するようにしておく。すなわち燃焼加熱室
28の前記鋳片10の端部が臨む燃焼ゾーンに
は、該鋳片端部を抱挾するような形で2枚の輻射
促進板34,36が水平に近接位置していること
になる。 As clearly shown in FIG. 3, the end of the slab 10 where the temperature tends to drop horizontally enters the opening of the combustion heating chamber 28 by an appropriate distance and is held by the heating zone of the heating chamber 28. It's starting to get pinched.
Therefore, at the opening periphery of this combustion heating chamber 28,
In order to reduce the gap between the slab 10 and the combustion heating chamber 28 as much as possible, it is desirable to provide a taper to form a constricted portion. Furthermore, the combustion heating chamber 28
An upper radiation promoting plate 34 and a lower radiation promoting plate 36 made of a so-called breathable solid are horizontally arranged and fixed above and below the slab 10 facing into the chamber, respectively. Between the ends of the plates 34 and 36 are heat-resistant insulating plates 38 and 38 as shown in FIG.
Make sure to connect it with That is, in the combustion zone where the end of the slab 10 of the combustion heating chamber 28 faces, two radiation promoting plates 34 and 36 are horizontally located close to each other so as to embrace the end of the slab. become.
なお、本明細書において前記輻射促進板34,
36の材質として使用される通気性固体とは、金
属、セラミツクス等の耐熱性材料を網状、ハニカ
ム状、繊維状、多孔質状に成形して通気性を持た
せた適宜厚さの固体をいい、これは細線または細
粒が多数集合して構成されたものと考えられるの
で、その実質的な表面積は極めて大きくなつてい
る。そして固体の輻射射出能力は気体の輻射射出
能力よりも充分高いものであるから、前記通気性
固体に後述するように高温の燃焼ガスを通過させ
ると、燃焼ガスの顕熱が表面積の極めて大きい通
気性固体と接触して高効率の熱交換が行われ、大
量の固体輻射熱を該燃焼ガスの上流側に射出する
というものである。本実施例の場合、線径1.0mm、
16メツシユの耐熱鋼金網を6層に積層し、厚さ約
12mmの板状にしたものを輻射促進板34,36と
して使用した。 Note that in this specification, the radiation promoting plate 34,
The breathable solid used as the material in 36 refers to a solid of appropriate thickness made by molding a heat-resistant material such as metal or ceramics into a net shape, honeycomb shape, fiber shape, or porous shape to give it breathability. This is thought to be composed of a large number of thin wires or fine grains, so its substantial surface area is extremely large. Since the radiation emission capacity of a solid is sufficiently higher than that of a gas, when high-temperature combustion gas is passed through the air-permeable solid as described later, the sensible heat of the combustion gas is transferred to the air-permeable gas, which has an extremely large surface area. A highly efficient heat exchange is performed by contacting with a solid solid, and a large amount of solid radiant heat is injected to the upstream side of the combustion gas. In the case of this example, the wire diameter is 1.0 mm,
Six layers of 16-mesh heat-resistant steel wire mesh are laminated to a thickness of approx.
12 mm plates were used as the radiation accelerator plates 34 and 36.
また燃焼加熱室28の頂部には、該室と連通す
るダクト40を設けて燃焼廃ガスの出口とし、該
室頂部と前記上部輻射促進板34との間に画成さ
れる空間にはバーナ供給用空気を予熱するための
熱交換器42を配設し、この熱交換器42から導
出した管体を前記ダクト40を介してバーナ32
に接続する。前記ダクト40の開口部上方には、
排気フード44を設け、該フード44は前記加熱
ブロツク16がレール18上を移動するときのダ
クト40の移動軌跡上に開口するよう予め寸法設
定しておく。 A duct 40 communicating with the combustion heating chamber 28 is provided at the top of the combustion heating chamber 28 to serve as an outlet for combustion waste gas, and a space defined between the top of the chamber and the upper radiation promotion plate 34 is provided with a duct 40 for supplying burner gas. A heat exchanger 42 for preheating the air for use is provided, and the pipe body led out from the heat exchanger 42 is passed through the duct 40 to the burner 32.
Connect to. Above the opening of the duct 40,
An exhaust hood 44 is provided, and the dimensions of the hood 44 are set in advance so as to open on the trajectory of movement of the duct 40 when the heating block 16 moves on the rail 18.
更に、第3図に示すように各加熱ブロツク1
6,16の対向側部に基部を固着した被覆板4
6,46を段差を設けて水平に張出たせ、適宜の
支持部材で支持して(図示せず)前記鋳片10の
上方を非接触で覆うよう構成する。この被覆板4
6,46は、鋳片10の表面から熱エネルギーが
逃出するのを極力防止するためのものであるから
耐熱性の熱絶縁材料からなるものとするが、前記
通気性固体を材質としてもよく、このときは鋳片
10から放射される輻射熱は該通気性固体におい
て大量の固体輻射熱として鋳片10に戻されるの
で、一層好適である。また前記の段差を付して配
設した2枚の被覆板46,46の重なり合う先端
部には、石綿、セラミツクフアイバー等の可撓性
に富む耐熱性シール48を付設して、該被覆空間
からの熱逃出を防止する。また周囲からの空気の
侵入防止や、周囲への燃焼ガスが無作為に吹出す
のを防止しかつ通気性固体を通過するガスの温度
を高めるため、燃焼加熱室28の開口周縁部に
は、第2図及び第3図に示すように耐熱性シール
50が延設されている。この耐熱性シールの代り
に、第6図に示す如くバーナの燃焼ガスを吹き出
させるフレームカーテンを用いてもよい。なお、
第3図において参照符号52は、鋳片10の下方
にその搬送方向に沿つて延設したステンレス反射
板を示し、これによつて鋳片10の下面からの熱
エネルギーの損失を極力防止するようにしてあ
る。 Furthermore, as shown in FIG.
Covering plate 4 whose base is fixed to the opposite sides of 6 and 16
6 and 46 are provided with a step and project horizontally, and are supported by a suitable support member (not shown) so as to cover the upper part of the slab 10 in a non-contact manner. This covering plate 4
6 and 46 are made of a heat-resistant heat insulating material because they are intended to prevent as much as possible the escape of thermal energy from the surface of the slab 10, but they may also be made of the above-mentioned air-permeable solid material. In this case, the radiant heat radiated from the slab 10 is returned to the slab 10 as a large amount of solid radiant heat in the air-permeable solid, which is more preferable. In addition, a highly flexible heat-resistant seal 48 made of asbestos, ceramic fiber, etc. is attached to the overlapping ends of the two covering plates 46, 46 arranged with a step difference, so that the covering space can be removed from the covered space. Prevents heat escape. In addition, in order to prevent air from entering from the surroundings, prevent combustion gas from randomly blowing out into the surroundings, and increase the temperature of the gas passing through the breathable solid, the opening periphery of the combustion heating chamber 28 has a As shown in FIGS. 2 and 3, a heat-resistant seal 50 is extended. Instead of this heat-resistant seal, a frame curtain may be used to blow out the combustion gas of the burner, as shown in FIG. In addition,
In FIG. 3, reference numeral 52 indicates a stainless steel reflector plate extending below the slab 10 along the conveyance direction, thereby preventing loss of thermal energy from the bottom surface of the slab 10 as much as possible. It is set as.
第5図は、本発明に係る鋳片の端部加熱装置の
別の実施例を示すものであつて、この端部加熱装
置ではバーナ54として燃焼ガスが略収束的に噴
射されるジエツトバーナを使用し、かつ燃焼加熱
室28における前記上部輻射促進板34及び下部
輻射促進板36により画成される領域内に、耐熱
性材料例えばセラミツクで構成した火炎分流板5
6を適宜の手段で配設する。ここで上部輻射促進
板34及び下部輻射促進板36により“画成”さ
れるとは、“上部輻射促進板34と下部輻射促進
板36とにより、燃焼加熱室28の内部を上方及
び下方に仕切つて、内部的に区画される”の意味
である。前記火炎分流板56は、ジエツトバーナ
54から前記鋳片10の端部に向けて略収束的に
噴射される燃焼ガスの火炎を偏向させ、熱投入の
特に必要な鋳片の隅角端部に指向させて均一加熱
を補助するものであるから、第5図に示すように
ジエツトバーナ54からの燃焼ガスの噴射方向で
かつ前記鋳片10の端部に近接して配設するのが
好ましい。 FIG. 5 shows another embodiment of the slab end heating device according to the present invention, in which a jet burner in which combustion gas is injected in a substantially convergent manner is used as the burner 54. In addition, a flame distribution plate 5 made of a heat-resistant material such as ceramic is provided in the area defined by the upper radiation promotion plate 34 and the lower radiation promotion plate 36 in the combustion heating chamber 28.
6 by appropriate means. Here, "defined" by the upper radiation promoting plate 34 and the lower radiation promoting plate 36 means that the inside of the combustion heating chamber 28 is partitioned into upper and lower parts by the upper radiation promoting plate 34 and the lower radiation promoting plate 36. It means "internally partitioned". The flame distribution plate 56 deflects the flame of the combustion gas that is injected from the jet burner 54 toward the end of the slab 10 in a substantially convergent manner, and directs it toward the corner end of the slab where heat input is particularly required. Since this assists uniform heating, it is preferable to dispose it in the direction of combustion gas injection from the jet burner 54 and close to the end of the slab 10, as shown in FIG.
本発明で使用するバーナには特に形式上の制限
はなく、多孔質れんがに空気と燃料を通じ、該れ
んがの表面近くで燃焼を行わせる所謂バーニング
ウオールを使用してもよい。例えば、第6図は本
発明に係る鋳片の端部加熱装置の更に別の実施例
を示すものであつて、前記放射型バーナ32やジ
エツトバーナ54に代えて、前記燃焼加熱室28
に多孔質れんが58を臨ませ、この多孔質れんが
58の背面に燃焼ガスと空気との混合気体を強制
供給することにより該気体を多孔質れんが58の
正面に浸透させ、高温の燃焼ガスを室28中に得
るようにしたバーニングウオール形式のものであ
る。この場合、多孔質れんが58自体が無数のバ
ーナの集合と看做すことができ、極めて均質な火
炎が得られる。また、燃焼加熱室28の開口縁部
とこの室中に臨む鋳片10との熱遮蔽は第3図に
示す耐熱性シール50としてもよいが、第6図に
示すように多孔質れんが60を前記開口縁部に配
設し、先と同様に燃焼ガスと空気との混合気体を
強制供給して火炎を放射させるようにした所謂フ
レームカーテンを採用するのが好適である。な
お、図中参照符号62は燃焼ガス供給管、64は
空気供給管(前記熱交換器42から導出接続する
のが好ましい)、66は燃焼ガスと空気とを所定
の比率に混合するミキサを示す。 There are no particular formal restrictions on the burner used in the present invention, and a so-called burning wall that allows air and fuel to pass through porous bricks to cause combustion near the surface of the bricks may be used. For example, FIG. 6 shows still another embodiment of the slab end heating device according to the present invention, in which the combustion heating chamber 28 is used instead of the radiant burner 32 and the jet burner 54.
A porous brick 58 is placed in front of the porous brick 58, and a mixed gas of combustion gas and air is forcibly supplied to the back of the porous brick 58, so that the gas permeates into the front of the porous brick 58, and the hot combustion gas is brought into the room. It is of the burning wall type that was obtained during the 28th century. In this case, the porous brick 58 itself can be regarded as a collection of countless burners, and an extremely homogeneous flame can be obtained. Further, the heat shield between the opening edge of the combustion heating chamber 28 and the slab 10 facing into the chamber may be a heat-resistant seal 50 shown in FIG. 3, but a porous brick 60 may be used as shown in FIG. It is preferable to employ a so-called frame curtain which is disposed at the edge of the opening and, as before, is configured to forcibly supply a mixture of combustion gas and air to radiate flame. In the figure, reference numeral 62 indicates a combustion gas supply pipe, 64 indicates an air supply pipe (preferably connected to the heat exchanger 42), and 66 indicates a mixer for mixing combustion gas and air at a predetermined ratio. .
「実施例の作用」
このように構成した本実施例に係る鋳片の端部
加熱装置の作用について、主として第3図に示す
装置に関連して次に説明する。先ず、ローラ14
上を搬送される鋳片10の幅寸法に合わせて、台
車22,22をレール18上に移動させ適宜位置
の調節を行い、該鋳片10の前記温度降下のし易
い端部を夫々加熱ブロツク16の燃焼加熱室28
に臨ませる(第3図参照)。この状態でバーナ3
2,32を点火して高温の燃焼ガスを燃焼加熱室
28に向けて放射し、一方前記ローラ14を回転
駆動して鋳片10の搬送を行う。前記燃焼加熱室
28に放射された燃焼ガスは該室の開口部周縁に
形成された前記絞り部で絞られて、加熱燃焼室2
8中に走行自在に臨んでいる鋳片10の端部を主
として対流熱伝達により加熱する。また加熱燃焼
室28中の高温の燃焼ガスの1部は該鋳片10の
上方及び下方に配置した上部輻射促進板34及び
下部輻射促進板36を通過して、夫々燃焼加熱室
28の頂部及び底部に向けて流出する。このと
き、先に述べたように高温の燃焼ガスは表面積の
極めて大きい通気性固体からなる輻射促進板3
4,36と接触することにより顕熱の高効率の熱
交換が行われ、該輻射促進板34,36は燃焼ガ
スの上流側(すなわち鋳片10に面した側)に大
量の輻射熱を射出し、これによつて鋳片10端部
近傍は上下両方向から追加的に加熱され、次工程
の熱間圧延に適した温度にまで再昇温される。更
に、バーナ32の稼動により輻射促進板34,3
6は高温に加熱されるので、燃焼ガス中に未燃焼
成分が含まれていてもこの高温になつている輻射
促進板34,36を通過する際に再燃焼し、燃焼
効率は一層向上する。"Operations of the Embodiment" The operations of the slab end heating device according to the present embodiment configured as described above will be described below, mainly in relation to the device shown in FIG. 3. First, roller 14
The carts 22, 22 are moved onto the rail 18 and their positions are adjusted appropriately according to the width dimension of the slab 10 being conveyed thereon. 16 combustion heating chambers 28
(See Figure 3). In this state, burner 3
2, 32 are ignited to radiate high-temperature combustion gas toward the combustion heating chamber 28, while the rollers 14 are rotationally driven to convey the slab 10. The combustion gas radiated into the combustion heating chamber 28 is throttled by the constriction formed at the periphery of the opening of the chamber, and the combustion gas is radiated into the combustion heating chamber 28.
The end portion of the slab 10 facing freely into the slab 8 is heated primarily by convective heat transfer. Further, a part of the high temperature combustion gas in the heating combustion chamber 28 passes through an upper radiation accelerating plate 34 and a lower radiation accelerating plate 36 disposed above and below the slab 10, and passes through the top and bottom of the combustion heating chamber 28, respectively. It flows out towards the bottom. At this time, as mentioned earlier, the high-temperature combustion gas is absorbed by the radiation promoting plate 3, which is made of an air-permeable solid with an extremely large surface area.
4, 36, highly efficient heat exchange of sensible heat is performed, and the radiation promoting plates 34, 36 inject a large amount of radiant heat to the upstream side of the combustion gas (that is, the side facing the slab 10). As a result, the vicinity of the end of the slab 10 is additionally heated from both the upper and lower directions, and the temperature is again raised to a temperature suitable for the next step of hot rolling. Furthermore, by operating the burner 32, the radiation promoting plates 34, 3
6 is heated to a high temperature, even if the combustion gas contains unburned components, they will be re-burned when passing through the high-temperature radiation promotion plates 34 and 36, further improving combustion efficiency.
なお、第5図に示す火炎分流板56を配設した
構造の加熱装置の場合は、ジエツトバーナ54か
ら噴射される燃焼ガスは前記鋳片10の端部近傍
に設けた火炎分流板56に衝突して流れ方向を偏
向させられ、鋳片10の温度降下の特に著して角
端部に重点的に熱投入を行つて、鋳片10の温度
分布を略均一に昇温させることができる。また、
第6図に示す装置でも、鋳片の端部加熱を同様に
好適に達成することができる。 In addition, in the case of a heating device having a structure in which a flame distribution plate 56 shown in FIG. The flow direction of the slab 10 is deflected, and heat is input intensively to the corner ends where the temperature drop of the slab 10 is particularly significant, thereby making it possible to increase the temperature distribution of the slab 10 substantially uniformly. Also,
The apparatus shown in FIG. 6 can similarly suitably achieve end heating of the slab.
次に、前記輻射促進板34,36を通過し、顕
熱を奪われて温度降下した燃焼廃ガスは燃焼加熱
室28の頂部に到来し、該頂部に配設した熱交換
器42と接触してバーナ供給用空気の予熱を行つ
た後、ダクト40を介してフード44に捕集され
る。また、前記被覆板46,46及び反射板52
は、鋳片10の上面及び下面からの熱逃出を遮断
して、該鋳片10の温度降下を防止する。なお、
熱間圧延設備に搬送される鋳片10の寸法の変更
があつた場合は、規格変更された新たな鋳片の寸
法に合わせるべく、台車22,22が接近・離間
移動して寸法調節が行われる。 Next, the combustion waste gas, which has passed through the radiation promoting plates 34 and 36 and whose temperature has been lowered by being deprived of sensible heat, reaches the top of the combustion heating chamber 28 and comes into contact with the heat exchanger 42 disposed at the top. After preheating the burner supply air, the air is collected in a hood 44 via a duct 40. Further, the covering plates 46, 46 and the reflecting plate 52
blocks heat escape from the upper and lower surfaces of the slab 10 and prevents the temperature of the slab 10 from dropping. In addition,
When the dimensions of the slab 10 to be transported to the hot rolling equipment are changed, the carts 22 and 22 are moved closer and further apart to adjust the dimensions in order to match the dimensions of the new slab whose specifications have been changed. be exposed.
「発明の効果」
以上詳細に説明したように、本発明に係る鋳片
の端部加熱装置によれば、加熱ブロツクにバーナ
が臨む燃焼加熱室を画成し、該燃焼加熱室に鋳片
の温度降下し易い端部を走行自在に臨ませ、かつ
前記燃焼加熱室の上方及び下方に夫々通気性固体
からなる輻射促進板を配設するよう構成したこと
により、バーナから燃焼加熱室中に放射される燃
焼ガスは該室中に臨んでいる鋳片の端部を対流及
び輻射熱伝達によつて加熱すると共に、まだ高温
の燃焼ガスが輻射促進板を通過接触する際に高効
率の熱交換を行つて大量の輻射熱を前記鋳片端部
に射出し、該鋳片を熱間圧延に適する温度まで熱
効率良く昇温させ得るものである。"Effects of the Invention" As explained in detail above, according to the slab end heating device according to the present invention, a combustion heating chamber in which a burner faces the heating block is defined, and a slab is heated in the combustion heating chamber. By allowing the end portion where the temperature tends to drop to be freely exposed, and by arranging radiation promoting plates made of air-permeable solid above and below the combustion heating chamber, radiation from the burner into the combustion heating chamber is provided. The combustion gas heated heats the end of the slab facing into the chamber by convection and radiation heat transfer, and when the still hot combustion gas passes through the radiation promotion plate and comes into contact with it, highly efficient heat exchange is performed. By doing so, a large amount of radiant heat is injected into the end of the slab, and the temperature of the slab can be raised with good thermal efficiency to a temperature suitable for hot rolling.
また装置全体も構成が簡単で極めてコンパクト
になり、従つて鋳片搬送装置の1部として組込む
ことが出来る等、設置面積の低減と省エネルギー
に寄与するものである。 Furthermore, the entire device has a simple structure and is extremely compact, so it can be incorporated as a part of a slab conveying device, contributing to a reduction in installation area and energy savings.
以上、本発明に係る鋳片の端部加熱装置につき
好適な実施例を挙げて説明したが、本発明はこの
実施例に限定されるものではなく、発明の精神の
範囲内で多くの改良・変更をなし得ることは勿論
である。 The preferred embodiments of the slab end heating device according to the present invention have been described above, but the present invention is not limited to these embodiments, and many improvements and improvements can be made within the spirit of the invention. Of course, changes can be made.
第1図は連続鋳造設備で製造され引続き熱間圧
延設備へ搬送される途次における鋳片の温度分布
を示す断面図、第2図は本発明に係る鋳片の端部
加熱装置の全体構造を概略図示する斜視図、第3
図は第2図の−線断面図、第4図は第3図の
−線断面図、第5図は本発明装置において分
流板を設けた別の実施例を示す部分断面図、第6
図は本発明装置においてバーナとして多孔質れん
がを設けかつ耐熱性シールに代えてフレームカー
テンを使用した別の実施例の部分断面図を示す。
10……鋳片、12……軸受、14……ロー
ラ、16……加熱ブロツク、18……レール、2
0……車輪、22……台車、24……バーナパネ
ル、26……炉壁、28……燃焼加熱室、32…
…バーナ、34,36……輻射促進板、38……
絶縁板、40……ダクト、42……熱交換器、4
4……排気フード、46……被覆板、48,50
……耐熱性シール、52……反射板、54……ジ
エツトバーナ、56……火炎分流板、58,60
……多孔質れんが、62……燃焼ガス供給管、6
4……空気供給管、66……ミキサ。
FIG. 1 is a cross-sectional view showing the temperature distribution of a slab manufactured in a continuous casting facility and subsequently transported to a hot rolling facility, and FIG. 2 is an overall structure of the end heating device for a slab according to the present invention. A perspective view schematically illustrating the third
The figures are a sectional view taken along the - line in Fig. 2, Fig. 4 is a sectional view taken along the - line in Fig. 3, Fig. 5 is a partial sectional view showing another embodiment in which a flow dividing plate is provided in the device of the present invention, and Fig. 6 is a sectional view taken along the - line in Fig. 2.
The figure shows a partial sectional view of another embodiment of the apparatus according to the invention, in which porous bricks are provided as burners and frame curtains are used instead of heat-resistant seals. 10... Slab, 12... Bearing, 14... Roller, 16... Heating block, 18... Rail, 2
0...Wheel, 22...Dolly, 24...Burner panel, 26...Furnace wall, 28...Combustion heating chamber, 32...
...Burner, 34, 36...Radiation promotion plate, 38...
Insulating plate, 40...Duct, 42...Heat exchanger, 4
4...Exhaust hood, 46...Covering plate, 48,50
... Heat-resistant seal, 52 ... Reflector, 54 ... Jet burner, 56 ... Flame distribution plate, 58, 60
... Porous brick, 62 ... Combustion gas supply pipe, 6
4...Air supply pipe, 66...Mixer.
Claims (1)
の鋳片10の温度降下し易い長手方向両端部を走
行自在に囲繞的に包挟可能で、かつ該鋳片10の
横幅寸法に適合させるべく相互に接近離間自在に
対向配置した1対の加熱ブロツク16,16内
に、前記鋳片10の長手方向端縁部に指向するバ
ーナ32を配設して1対の燃焼加熱室28,28
を構成し、 前記各燃焼加熱室28における前記鋳片10の
温度降下し易い両端部の走行領域の上方及び下方
に、通気性固体からなる輻射促進板34,36を
夫々配設した ことを特徴とする鋳片の端部加熱装置。 2 前記各燃焼加熱室28の前記上部及び下部輻
射促進板34,36により画成される領域に、耐
火性材料からなる火炎分流板56を配設してなる
特許請求の範囲第1項記載の鋳片の端部加熱装
置。[Scope of Claims] 1. A long slab 10 that is conveyed on a large number of rollers 14 and can be freely wrapped around both ends in the longitudinal direction where the temperature tends to drop, and that the slab 10 is A burner 32 directed toward the longitudinal edge of the slab 10 is disposed in a pair of heating blocks 16, 16, which are arranged facing each other so as to be able to approach and separate from each other in order to match the width dimension of the slab. Combustion heating chamber 28, 28
Radiation promoting plates 34 and 36 made of air-permeable solid are respectively disposed above and below the running area of both ends of the slab 10 where the temperature tends to drop in each combustion heating chamber 28. An end heating device for slabs. 2. A flame distribution plate 56 made of a fire-resistant material is disposed in a region defined by the upper and lower radiation promoting plates 34 and 36 of each combustion heating chamber 28. Slab end heating device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5755482A JPS58176013A (en) | 1982-04-06 | 1982-04-06 | Device for heating end part of ingot |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5755482A JPS58176013A (en) | 1982-04-06 | 1982-04-06 | Device for heating end part of ingot |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58176013A JPS58176013A (en) | 1983-10-15 |
JPS645964B2 true JPS645964B2 (en) | 1989-02-01 |
Family
ID=13059022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5755482A Granted JPS58176013A (en) | 1982-04-06 | 1982-04-06 | Device for heating end part of ingot |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58176013A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS609514A (en) * | 1983-06-27 | 1985-01-18 | Chugai Ro Kogyo Kaisha Ltd | Device for heating end part of hot billet |
JPH01139912U (en) * | 1988-03-15 | 1989-09-25 | ||
JPH0614884Y2 (en) * | 1988-03-17 | 1994-04-20 | 新日本製鐵株式会社 | Device to prevent overcooling of hot steel strips |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5019612A (en) * | 1973-06-22 | 1975-03-01 |
-
1982
- 1982-04-06 JP JP5755482A patent/JPS58176013A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58176013A (en) | 1983-10-15 |
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