JPS6239207B2 - - Google Patents
Info
- Publication number
- JPS6239207B2 JPS6239207B2 JP21215283A JP21215283A JPS6239207B2 JP S6239207 B2 JPS6239207 B2 JP S6239207B2 JP 21215283 A JP21215283 A JP 21215283A JP 21215283 A JP21215283 A JP 21215283A JP S6239207 B2 JPS6239207 B2 JP S6239207B2
- Authority
- JP
- Japan
- Prior art keywords
- heating chamber
- billet
- burner
- heating
- high temperature
- 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 42
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011819 refractory material 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
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
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)
Description
【発明の詳細な説明】
本発明は、鋼片端部急速加熱装置およびその加
熱方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rapid heating device for the end of a steel billet and a heating method thereof.
従来、鋼片の端部（エツジ部）加熱装置として
は種々のものが提案されているが、鋼片の上下部
を覆うカバーを有するものであつて装置全体が大
型であるとともに、鋼片側方に設けたバーナで主
として火炎による直接加熱のみであるため、鋼片
表面積当りの伝熱量が、1000℃の熱片基準で40〜
70×104KCal／m2ｈと少なく、十分な伝熱量を得
ることができないものであつた。 Conventionally, various types of devices for heating the edge of a steel billet have been proposed, but they have a cover that covers the top and bottom of the steel billet, making the entire device large, and one side of the steel billet heating device is large. Because the burner installed in the steel plate mainly uses direct flame heating, the amount of heat transferred per surface area of the steel plate is 40 to
The heat transfer rate was as low as 70×10 4 KCal/m 2 h, making it impossible to obtain a sufficient amount of heat transfer.
本発明は前記従来の欠点を除去するためになさ
れたもので、加熱を必要とする鋼片の両側を包囲
する加熱室を設け、この加熱室に、加熱室を高温
に保持するバーナと、鋼片の端部（エツジ）を直
接火炎により加熱する酸素バーナとを設け、つま
り、加熱室を鋼片の端部のみを包囲するようにし
て装置の小型化を図り、鋼片通過時には酸素バー
ナを点火し、非通過時には、酸素バーナを消火
し、高温保持用バーナのみを燃焼させるようにし
て、鋼片通過時には加熱室の輻射伝熱を有効に利
用することにより伝熱量の大きい鋼片端部急速加
熱装置およびその加熱方法を提供することを目的
とする。 The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional method, and includes a heating chamber surrounding both sides of a steel piece that requires heating, a burner that maintains the heating chamber at a high temperature, and a steel piece that needs to be heated. An oxygen burner that directly heats the edge of the steel piece with flame is installed.In other words, the heating chamber surrounds only the edge of the steel piece, reducing the size of the device. When the billet is not passing through, the oxygen burner is extinguished and only the high-temperature maintenance burner is allowed to burn.When the billet is not passing through, the radiant heat transfer in the heating chamber is effectively used to quickly heat the end of the billet, which has a large amount of heat transfer. An object of the present invention is to provide a heating device and a heating method thereof.
つぎに、本発明を一実施例である図面にしたが
つて説明する。 Next, the present invention will be explained with reference to the drawings which are one embodiment.
図において、１は鋼片Ｗの搬送路両側に設置さ
れた加熱室（図では片方のみを示している）で、
鋼片Ｗの両側面と上・下面端部とを包囲するよう
に略コ字形をなす耐火材２からなり、その外周部
は内部が水冷構造の水冷壁３で被覆されている。 In the figure, 1 is a heating chamber (only one side is shown in the figure) installed on both sides of the conveyance path of the steel billet W.
It is made of a substantially U-shaped refractory material 2 that surrounds both sides and the upper and lower ends of the steel piece W, and its outer periphery is covered with a water-cooled wall 3 having a water-cooled structure inside.
また、加熱室１の対向する端部には内方に突出
する突出部４が設けられ、加熱室１の内方に燃焼
室５が形成されるとともに、加熱室１の上壁には
パイロツトバーナ兼用の高温保持用バーナ６が、
側壁には鋼材Ｗの側端部を火炎で直接加熱する酸
素バーナ（酸素リツチバーナを含む）７がそれぞ
れ設けてある。 In addition, a protrusion 4 that protrudes inward is provided at the opposite end of the heating chamber 1, and a combustion chamber 5 is formed inside the heating chamber 1. The dual-purpose high temperature maintenance burner 6 is
Oxygen burners (including oxygen rich burners) 7 are provided on the side walls to directly heat the side ends of the steel material W with flame.
なお、前記各加熱室１は、鋼片Ｗの板巾に対応
して互いに離間可能に図示しないサイドガイドあ
るいは架台に取付けてある。 The heating chambers 1 are attached to side guides or frames (not shown) so that they can be separated from each other in accordance with the width of the steel piece W.
本発明にかかる鋼片端部急速加熱装置は前記の
ように構成されており、前記高温保持用バーナ６
は材料通過前に点火され、加熱室１を高温に保持
する。 The steel billet end rapid heating device according to the present invention is configured as described above, and the high temperature maintenance burner 6
is ignited before the material passes through, keeping the heating chamber 1 at a high temperature.
そして、鋼片Ｗが加熱室１に至る直前に酸素バ
ーナ７を点火するとともに、高温保持用バーナ６
を消火あるいは低燃焼状態とし、鋼片Ｗの端部を
主として加熱室１の内壁からの輻射伝熱により加
熱するとともに、酸素バーナ７の火炎により直接
加熱する。このように、本発明においては、加熱
室１からの輻射伝熱を積極的に利用するため、鋼
片の端部表面積当りの伝熱量は1000℃熱片基準で
120×104KCal／m2ｈ以上とすることができた。 Then, just before the steel piece W reaches the heating chamber 1, the oxygen burner 7 is ignited, and the high temperature maintenance burner 6 is ignited.
is extinguished or brought into a low combustion state, and the end of the steel billet W is heated mainly by radiant heat transfer from the inner wall of the heating chamber 1, and also directly by the flame of the oxygen burner 7. In this way, in the present invention, since the radiation heat transfer from the heating chamber 1 is actively utilized, the amount of heat transferred per end surface area of the steel slab is based on the 1000°C hot slab standard.
120×10 4 KCal/m 2 h or more.
前記実施例では高温保持用バーナ６を加熱室１
の上壁に設けたものを示したが、下壁に設けても
よく、かつ、このバーナ６も酸素エンリツチある
いは純酸素バーナでもよい。 In the embodiment described above, the burner 6 for maintaining high temperature is placed in the heating chamber 1.
Although the burner 6 is shown as being installed on the upper wall, it may also be installed on the lower wall, and this burner 6 may also be an oxygen enriched or pure oxygen burner.
また、バーナ７も必ずしも加熱室１の側壁中央
に設ける必要もなく、上・下にそれぞれ設け、鋼
片Ｗの端部を火炎で直接加熱するようにしてもよ
いことは勿論である。 Further, the burner 7 does not necessarily need to be provided at the center of the side wall of the heating chamber 1, but it is of course possible to provide it at the top and bottom, respectively, so that the ends of the steel piece W are directly heated with flame.
さらに、加熱室１に、複数本のバーナ６と７と
を設ける場合には、鋼片Ｗの端部昇温温度によつ
てはその一部のみを作動させるようにしてもよ
い。 Furthermore, when a plurality of burners 6 and 7 are provided in the heating chamber 1, only a part of them may be operated depending on the temperature raised at the end of the steel billet W.
以上の説明で明らかなように、本発明における
鋼片の端部急速加熱装置によれば、加熱室は鋼片
全巾にわたつて設けるものでなく、鋼片の端部に
のみ設けるため装置が小型である。そして、鋼片
の端部加熱を、従来のように、火炎の直接加熱に
よつてのみ行なうものでなく、加熱室の輻射熱を
有効利用するため、小型で従来のものより大なる
伝熱量が得られ、必要熱量を従来のものの1/3以
下とすることができる。 As is clear from the above description, according to the device for rapidly heating the end of a steel billet according to the present invention, the heating chamber is not provided over the entire width of the billet, but is provided only at the end of the billet, so the device is It is small. The end of the steel billet is heated not only by direct flame heating as in the past, but also by effectively utilizing the radiant heat of the heating chamber, resulting in a smaller size and a larger amount of heat transfer than the conventional method. The amount of heat required can be reduced to less than 1/3 of that of conventional methods.
また、実施例のように、加熱室の対向端部を内
方に突出させて加熱室を包囲する構造とすると、
燃焼室での熱損失が少なく、かつ、高温保持用バ
ーナを消火し、酸素バーナを点火して鋼片端部を
加熱する場合、火炎が狭い開口から噴出するた
め、周囲の空気を巻込まず、熱効率がよいととも
にNOxの発生を低減できるという効果をも奏す
るものである。 Further, as in the embodiment, if the opposite end of the heating chamber is made to protrude inward and surround the heating chamber,
Heat loss in the combustion chamber is small, and when the high-temperature maintenance burner is extinguished and the oxygen burner is ignited to heat the end of the steel piece, the flame ejects from a narrow opening, so the surrounding air is not drawn in, and thermal efficiency is improved. This has the effect of reducing the amount of NOx generated.
第１図は本発明の鋼片端部急速加熱装置の片方
を示す断面図で、第２図はその正面図である。
１…加熱室、５…燃焼室、６…高温保持用バー
ナ、７…酸素バーナ、Ｗ…鋼片。
FIG. 1 is a sectional view showing one side of the apparatus for rapidly heating the end of a steel billet according to the present invention, and FIG. 2 is a front view thereof. DESCRIPTION OF SYMBOLS 1... Heating chamber, 5... Combustion chamber, 6... Burner for high temperature maintenance, 7... Oxygen burner, W... Steel piece.
Claims (1)
面と上・下面端部とを包囲する加熱室を設けると
ともに、この加熱室に加熱室を高温に保持する高
温保持用バーナと、鋼片の端部を直接火炎により
加熱する酸素バーナとを設けたことを特徴とする
鋼片端部急速加熱装置。 ２ 搬送される鋼片の両側に、それぞれ鋼片の側
面と上・下面端部とを包囲する加熱室を設けると
ともに、この加熱室に加熱室を高温に保持する高
温保持用バーナと、鋼片の端部を直接火炎により
加熱する酸素バーナとを設け、鋼片通過時には前
記酸素バーナを点火し、非通過時には前記酸素バ
ーナを消火し、前記高温保持用バーナのみを燃焼
させることを特徴とする鋼片端部急速加熱方法。[Scope of Claims] 1. A heating chamber is provided on both sides of the steel billet to be conveyed, each surrounding the side surface and the upper and lower end portions of the billet, and a high temperature holding device is provided in the heating chamber to keep the heating chamber at a high temperature. 1. A device for rapidly heating an end of a steel billet, comprising: a burner for heating the end of the billet; and an oxygen burner that directly heats the end of the billet with a flame. 2 A heating chamber is provided on both sides of the steel billet to be conveyed, each surrounding the side surface and the upper and lower ends of the steel billet, and a high temperature maintenance burner for keeping the heating chamber at a high temperature is installed in this heating chamber, and a steel billet is placed in the heating chamber. and an oxygen burner that directly heats the end portion of the plate with a flame, the oxygen burner is ignited when the billet passes through, the oxygen burner is extinguished when the billet is not passing through, and only the high temperature maintenance burner is burned. Rapid heating method for the end of a steel billet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21215283A JPS60103122A (en) | 1983-11-10 | 1983-11-10 | Quick heater for end of billet and heating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21215283A JPS60103122A (en) | 1983-11-10 | 1983-11-10 | Quick heater for end of billet and heating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60103122A JPS60103122A (en) | 1985-06-07 |
| JPS6239207B2 true JPS6239207B2 (en) | 1987-08-21 |
Family
ID=16617750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21215283A Granted JPS60103122A (en) | 1983-11-10 | 1983-11-10 | Quick heater for end of billet and heating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60103122A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271841A (en) * | 1996-04-03 | 1997-10-21 | Chugai Ro Co Ltd | Heating method for rough rolling coil and coil heating device in coil box |
-
1983
- 1983-11-10 JP JP21215283A patent/JPS60103122A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60103122A (en) | 1985-06-07 |
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