JPS60215716A - Burning method for heating furnace - Google Patents
Burning method for heating furnaceInfo
- Publication number
- JPS60215716A JPS60215716A JP7098584A JP7098584A JPS60215716A JP S60215716 A JPS60215716 A JP S60215716A JP 7098584 A JP7098584 A JP 7098584A JP 7098584 A JP7098584 A JP 7098584A JP S60215716 A JPS60215716 A JP S60215716A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- combustion
- region
- heating furnace
- heated
- 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.)
- Granted
Links
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
Abstract
Description
【発明の詳細な説明】
この発明は鋼材の加熱炉の燃焼方法に関し、スケールの
発生による品質の低下を防止することを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for burning steel materials in a heating furnace, and an object of the present invention is to prevent deterioration in quality due to scale formation.
一般の加熱炉におけるバーナ燃焼は空気比１１〜１．２
で燃焼させており、そのため燃焼ガス中の雰囲気は過剰
酸素を含む酸化性雰囲気となっている・その結果被加熱
材は酸化性雰囲気にさらされながら加熱されることにな
ル、スケール発生量が多く、これによる歩留フ低下が大
きかった。The burner combustion in a general heating furnace has an air ratio of 11 to 1.2.
As a result, the atmosphere in the combustion gas is an oxidizing atmosphere containing excess oxygen.As a result, the material to be heated is heated while being exposed to an oxidizing atmosphere, which reduces the amount of scale generated. In many cases, this caused a large drop in yield.
また一般的な直火式無酸化燃焼方式は水性ガス化反応理
論に基づく無酸化雰囲気が得られる空気比で燃焼させて
いる。水性ガス化反応に基づく無酸化雰囲気は、燃料を
空気比ｍ＝１．０以下の不完全燃焼によシ得られる燃焼
ガス中のＣＯ／ＣＯ２及びＨ１／ＨＢＯの値で決定され
、これらの値は第１図に示す様に加熱温度によって異な
る。即ち第１図かられかるように、加熱温度が高くなれ
ば珍るほど無酸化雰囲気を得る為にはＣｏ／Ｃｏ、の値
を大きくする必要があシ、一般加熱炉（加熱温度１２０
０〜１３００℃）ではｃｏ７’ｃｏ２＝ ３．１〜３．
３を確保する必要がある。この無酸化雰囲気管得るため
の設定空気比ｍは燃料組成によシ若干異なり、コークス
炉ガスの場合は第２図に示すようにｍ中０．５である。Furthermore, in the general direct-fire non-oxidizing combustion method, combustion is performed at an air-to-air ratio that provides a non-oxidizing atmosphere based on the theory of water gasification reactions. The non-oxidizing atmosphere based on the water gasification reaction is determined by the values of CO/CO2 and H1/HBO in the combustion gas obtained by incomplete combustion of fuel at an air ratio m = 1.0 or less, and these values varies depending on the heating temperature, as shown in FIG. In other words, as shown in Figure 1, the higher the heating temperature, the larger the value of Co/Co is required to obtain a non-oxidizing atmosphere.
0-1300℃), co7'co2 = 3.1-3.
It is necessary to secure 3. The set air ratio m for obtaining this non-oxidizing atmosphere tube varies slightly depending on the fuel composition, and in the case of coke oven gas, it is 0.5 in m as shown in FIG.
このように従来性われている直火式の無酸化加熱方式で
は燃料を極端な不完全燃焼で加熱することになるため、
火炎温度が低下し、その結果加熱能率が低下する。また
多量の未燃分が発生し、これらの結果燃料原単位が非常
に悪くなるという欠点があった。In this conventional direct flame non-oxidation heating method, the fuel is heated through extremely incomplete combustion.
The flame temperature decreases, resulting in a decrease in heating efficiency. In addition, a large amount of unburned matter is generated, resulting in a very poor fuel consumption rate.
本発明は上記した従来技術の欠点を改善するためになさ
れたもので、スケールを発生せずしかも加熱能率の低下
や未燃分の発生を起さない加熱方法を提供しようとする
ものであシ、被加熱材を囲む領域を空気比１．０未満て
燃焼させ、この領域の燃焼で発生した未燃分を該領域の
外側で燃焼させることを基本的な特徴とするものである
◎
以下図面に基づいて本発明法を詳説する。The present invention has been made in order to improve the above-mentioned drawbacks of the prior art, and aims to provide a heating method that does not generate scale, reduce heating efficiency, or generate unburned matter. The basic feature is that the area surrounding the material to be heated is combusted at an air ratio of less than 1.0, and the unburned matter generated by combustion in this area is combusted outside the area. The method of the present invention will be explained in detail based on the following.
第３図は＃抜管製造に際し帯鋼（Ｘ）を移送させつつ加
熱する加熱炉（１）に本発明を適用した例を示すもので
、この加熱炉（１）では両側壁部に多数のバーナを備え
、このバーナから噴出する燃焼ガス中に帯鋼（Ｘ）を通
過させ１２５０〜１３００℃まで急速加熱している。Figure 3 shows an example in which the present invention is applied to a heating furnace (1) that heats a strip steel (X) while transferring it during the manufacture of tube extrusion.This heating furnace (1) has many burners on both side walls. The steel strip (X) is passed through the combustion gas ejected from this burner and rapidly heated to 1250 to 1300°C.
本発明では、帯鋼（Ｘ）に対応する位置の１次燃焼ボー
） （２ａ）から帯ｇ４（Ｘ）を囲むように燃焼ガスを
噴出し燃焼させる。この１次燃焼の空気比は１．０未満
とする。こｎにより帯鋼（Ｘ）を囲む領域（Ａ）は未燃
分を含んだ雰囲気となって帯鋼（Ｘ）に接触し、スケー
ル発生を抑制する。In the present invention, combustion gas is ejected from the primary combustion bow (2a) at a position corresponding to the steel strip (X) so as to surround the strip g4(X) and burn it. The air ratio for this primary combustion is less than 1.0. As a result, the region (A) surrounding the steel strip (X) becomes an atmosphere containing unburned matter, comes into contact with the steel strip (X), and suppresses scale generation.
１次燃焼ボー） （２ａ）の近傍上下には更にスリット
状の２次燃焼ポート（２ｂ）を設け、ここから２次燃焼
ガスを領域（Ａ）の上下に吹き込み、１次燃焼で生じた
未燃分を完全燃焼させる・これにより燃焼火炎温度を上
げ加熱能力を保証する。この２次燃焼ガスは帯鋼（Ｘ）
に接触させない。A slit-shaped secondary combustion port (2b) is further provided above and below the area (2a), from which secondary combustion gas is blown into the upper and lower areas of the area (A), and the unused gas produced by the primary combustion is blown into the area (A). Completely burns the fuel - This raises the combustion flame temperature and guarantees heating capacity. This secondary combustion gas is a steel strip (X)
Do not let it come into contact with.
２次燃焼ポー） （２ｂ）から噴出するガスは空気か又
は酸化性ガスでも良い。後者の場合、１次燃焼で発生し
た未燃分を完全燃焼させるに必要な余剰へを含んだガス
とする。また第４図に示すように２次燃焼ポート（２ｂ
）ｔ−上下２段に配設しても良い◎
上記したように本発明法で祉未燃分を有する１次燃焼ガ
スを被加熱材に接触させ、この１次燃焼で発生した未燃
分を急速に燃焼させ、かつここで発生した酸化性２次燃
焼ガスを被加熱材に接触させない必要があるが、そのた
めＫは１次燃焼ガス及び２次燃焼ガスの噴出速度、バー
ナタイル径、２次燃焼ポートのスリット巾及びその設置
位置、更に２次燃焼ガスの上下流量比等をバーナ容量に
応じて最適値に決定する。The gas ejected from the secondary combustion port (2b) may be air or an oxidizing gas. In the latter case, the gas contains the surplus necessary to completely burn the unburned matter generated in the primary combustion. In addition, as shown in Figure 4, the secondary combustion port (2b
) T - May be arranged in two stages, upper and lower It is necessary to burn the oxidizing secondary combustion gas rapidly and to prevent the oxidizing secondary combustion gas generated here from coming into contact with the heated material. Therefore, K is the ejection velocity of the primary combustion gas and secondary combustion gas, the burner tile diameter, 2 The slit width of the secondary combustion port and its installation position, as well as the upper and lower flow rate ratio of secondary combustion gas, etc. are determined to optimal values according to the burner capacity.
なお第５図は、バーナ（２Ｊの好ましい配置例を示す平
面図であシ、向き合うバーナを千鳥状に配置することに
より、未燃分を含む雰囲気がとぎｎることなく帯鋼（Ｘ
）全体を包むようになシスケール抑制効果が促進される
。FIG. 5 is a plan view showing a preferable arrangement example of the burners (2J).
) The cisscale suppression effect is promoted in a manner that encompasses the whole.
第６図に本発明法に−よる場合のスケール発生率を従来
法との比較で示す。従来法ではスケール発生率２チであ
るのに対し本発明では０．２チに低下している。またこ
の際の帯鋼の加熱時間は第７図に示すように従来法と殆
んど差がなく加熱能率の保証が確保できることがわがる
・
以上説明したように本発明の加熱炉の燃焼方法によｎは
、スケールの発生を抑制できる上、加熱能率が低下する
ことがない。また最終的に未燃分も発生することがない
から燃料原単位を悪化させることもない等の効果がある
。FIG. 6 shows the scale occurrence rate when the method of the present invention is used in comparison with the conventional method. In the conventional method, the scale occurrence rate is 2 inches, but in the present invention, it is reduced to 0.2 inches. In addition, as shown in Figure 7, the heating time for the steel strip at this time is almost the same as that of the conventional method, and it can be seen that the heating efficiency can be guaranteed.As explained above, the combustion method of the heating furnace of the present invention In addition to being able to suppress the generation of scale, heating efficiency does not decrease. Further, since no unburned matter is ultimately generated, there are effects such as no deterioration of fuel consumption rate.
第１図は鉄の酸化・還元平衡図、第２図はコークスガス
の空気比とＣＯ／ＣＯ２、Ｈ１／Ｈ２０の関係を示すグ
ラフ、第３図乃至第５因は本発明方法の説明図、第６図
は本発明方法によるスケール発生率を示すグラフ、第７
図は加熱時間を示すグラフである。
特許出願人 日本鍋管株式会社
発 明 者 佐 １） 哲 男
同 多 １） 健
同 仲 村 勲
代理人弁理士 吉 鳳 省 玉
量 西 高 橋 清Figure 1 is an oxidation/reduction equilibrium diagram of iron, Figure 2 is a graph showing the relationship between coke gas air ratio and CO/CO2, H1/H20, Figures 3 to 5 are explanatory diagrams of the method of the present invention, FIG. 6 is a graph showing the scale occurrence rate according to the method of the present invention, and FIG.
The figure is a graph showing heating time. Patent Applicant Nippon Nabekan Co., Ltd. Inventor Sa 1) Tetsuo Dota 1) Kendo Nakamura Isao Representative Patent Attorney Yoshi Otori Sho Tamayo Nishi Takahashi Kiyoshi
Claims (1)
の領域の燃焼で発生した未燃分を該領域の外側で燃焼さ
せることを特徴とする加熱炉の燃焼方法。A heating furnace combustion method characterized in that a region surrounding a material to be heated is combusted at an air ratio of less than 1.0, and unburned matter generated by combustion in this region is combusted outside the region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7098584A JPS60215716A (en) | 1984-04-11 | 1984-04-11 | Burning method for heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7098584A JPS60215716A (en) | 1984-04-11 | 1984-04-11 | Burning method for heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60215716A true JPS60215716A (en) | 1985-10-29 |
| JPS6360094B2 JPS6360094B2 (en) | 1988-11-22 |
Family
ID=13447328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7098584A Granted JPS60215716A (en) | 1984-04-11 | 1984-04-11 | Burning method for heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60215716A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62188720A (en) * | 1986-02-13 | 1987-08-18 | Nippon Kokan Kk <Nkk> | Multilayer atmospheric combustion type heating apparatus |
| JPS62228430A (en) * | 1986-03-31 | 1987-10-07 | Nippon Kokan Kk <Nkk> | Method for heating steel material |
| FR2785668A1 (en) * | 1998-11-10 | 2000-05-12 | Air Liquide | METHOD FOR HEATING A CONTINUOUSLY LOADING OVEN IN PARTICULAR FOR STEEL PRODUCTS, AND CONTINUOUSLY LOADING HEATING OVEN |
| EP1816219A1 (en) * | 2006-02-03 | 2007-08-08 | Linde Aktiengesellschaft | Process for the heat treatment of metal strips by direct flame impingement |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55724U (en) * | 1978-06-15 | 1980-01-07 | ||
| JPS55125237A (en) * | 1979-03-19 | 1980-09-26 | Nippon Kokan Kk <Nkk> | Bright direct fire heating method of steel strip |
| JPS6039603U (en) * | 1983-08-26 | 1985-03-19 | 株式会社 東京ブラザ−シュ−ズ | shoes |
-
1984
- 1984-04-11 JP JP7098584A patent/JPS60215716A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55724U (en) * | 1978-06-15 | 1980-01-07 | ||
| JPS55125237A (en) * | 1979-03-19 | 1980-09-26 | Nippon Kokan Kk <Nkk> | Bright direct fire heating method of steel strip |
| JPS6039603U (en) * | 1983-08-26 | 1985-03-19 | 株式会社 東京ブラザ−シュ−ズ | shoes |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62188720A (en) * | 1986-02-13 | 1987-08-18 | Nippon Kokan Kk <Nkk> | Multilayer atmospheric combustion type heating apparatus |
| JPH036966B2 (en) * | 1986-02-13 | 1991-01-31 | Nippon Kokan Kk | |
| JPS62228430A (en) * | 1986-03-31 | 1987-10-07 | Nippon Kokan Kk <Nkk> | Method for heating steel material |
| FR2785668A1 (en) * | 1998-11-10 | 2000-05-12 | Air Liquide | METHOD FOR HEATING A CONTINUOUSLY LOADING OVEN IN PARTICULAR FOR STEEL PRODUCTS, AND CONTINUOUSLY LOADING HEATING OVEN |
| EP1001237A1 (en) * | 1998-11-10 | 2000-05-17 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Heating process of a continuous furnace, in particular for steel products and continuous furnace |
| EP1816219A1 (en) * | 2006-02-03 | 2007-08-08 | Linde Aktiengesellschaft | Process for the heat treatment of metal strips by direct flame impingement |
| WO2007087973A2 (en) * | 2006-02-03 | 2007-08-09 | Linde Aktiengesellschaft | Process for the heat treatment of steel strips in a continuous furnace with oxy-fuel burners |
| WO2007087973A3 (en) * | 2006-02-03 | 2007-11-29 | Linde Ag | Process for the heat treatment of steel strips in a continuous furnace with oxy-fuel burners |
| JP2009525401A (en) * | 2006-02-03 | 2009-07-09 | リンデ アクチエンゲゼルシヤフト | Heat treatment method for steel strip in a continuous heat treatment furnace equipped with an oxy-fuel burner |
| US9322598B2 (en) | 2006-02-03 | 2016-04-26 | Linde Aktiengesellschaft | Process for the heat treatment of steel strips |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6360094B2 (en) | 1988-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |