JPH0121205B2 - - Google Patents
Info
- Publication number
- JPH0121205B2 JPH0121205B2 JP19032785A JP19032785A JPH0121205B2 JP H0121205 B2 JPH0121205 B2 JP H0121205B2 JP 19032785 A JP19032785 A JP 19032785A JP 19032785 A JP19032785 A JP 19032785A JP H0121205 B2 JPH0121205 B2 JP H0121205B2
- Authority
- JP
- Japan
- Prior art keywords
- flame
- temperature
- oxidation
- plasma
- gas
- 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
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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は連続焼鈍炉（CAL）、連続溶融亜鉛
メツキ設備（CGL）及び鍛接管製造設備等にお
ける薄鋼板の連続加熱並びにインラインでの鋼材
の表面加熱等に適用される直火無酸化加熱方法に
関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to the continuous heating of thin steel sheets in continuous annealing furnaces (CAL), continuous hot-dip galvanizing equipment (CGL), forge-welded pipe manufacturing equipment, etc., and the surface treatment of steel materials in-line. The present invention relates to a direct flame non-oxidation heating method applied to heating and the like.
鋼板の直火無酸化加熱法として、例えばシーラ
ス（Selas）社の無酸化加熱方式がある。この方
式の場合、鋼板への衝突時の火炎温度が高い程、
無酸化加熱限界も高くなることが知られている。
しかし、この方式では、予混合バーナを用いてい
るため、火炎温度を積極的に高めることができ
ず、上記限界温度は700℃前後である。一方、拡
散タイプのバーナを用いた直火無酸化加熱法が、
特願昭60−88731で提案されている。この方式で
は空気予熱により限界温度を900℃前後まで高め
ることができるとされている。
As an example of a method for directly heating a steel plate without oxidation, there is a non-oxidation heating method manufactured by Selas. In this method, the higher the flame temperature at the time of collision with the steel plate, the
It is known that the non-oxidation heating limit also becomes high.
However, since this method uses a premix burner, it is not possible to actively increase the flame temperature, and the above-mentioned limit temperature is around 700°C. On the other hand, the direct flame non-oxidation heating method using a diffusion type burner
This was proposed in Japanese Patent Application No. 1988-88731. This method is said to be able to raise the limit temperature to around 900 degrees Celsius by preheating the air.
しかし、いずれの方式も、鋼材を900℃前後以
上1200℃の高温域まで加熱することはできない。
そこで、更に限界温度を高めるために、すなわち
火炎温度を高める手段として、燃焼用空気に酸素
を富化することが考えられるが、この場合Co2、
H2Oの熱解離が大きくなるため、期待するほど
の火炎温度の上昇はみられない。 However, neither method can heat the steel material to a high temperature range of around 900°C to 1200°C.
Therefore, in order to further increase the critical temperature, that is, as a means of increasing the flame temperature, it may be possible to enrich the combustion air with oxygen, but in this case Co 2 ,
Because the thermal dissociation of H 2 O increases, the flame temperature does not increase as much as expected.
この発明は、鋼材を鋼材温度900℃以上の高温
域まで加熱できるようにした直火無酸化加熱法を
提供することを目的とするものである。 An object of the present invention is to provide a direct flame oxidation-free heating method that allows steel materials to be heated to a high temperature range of 900° C. or higher.
この発明の直火無酸化加熱法の特徴は、空気比
1.0以下での燃焼火炎中にプラズマガスをインジ
エクシヨンすることにより火炎温度を高め、この
高温火炎を鋼材に衝突させることによつて鋼材を
無酸化状態で加熱することである。
The feature of the direct fire non-oxidation heating method of this invention is that the air ratio
The method is to increase the flame temperature by injecting plasma gas into the combustion flame at a temperature of 1.0 or less, and to heat the steel material in a non-oxidizing state by colliding this high-temperature flame with the steel material.
以下本発明法の一実施例を図面を参照して説明
する。第１図は本発明方法を実施するために用い
られるバーナの一例である。図中１は、円筒形の
バーナタイルで、その中心部に、バーナ本体２が
設けられている。バーナ本体２の外周部に燃料Ｆ
の流路３が形成され、燃料Ｆが先端部の吐出孔３
ａから軸心に垂直方向に吐出されるようになつて
いる。また燃焼用空気Ａは、バーナタイルの内周
壁に接線方向にあけられた吐出孔１ａから吐出さ
れ、強旋回火炎を形成するようになつている。一
方上記バーナ本体２の中心部にプラズマ電極対４
が設けられ、電極間に送給されるプラズマガスＰ
が超高温に加熱され、プラズマジエツトとして、
上記強旋回火炎中にインジエクシヨンされるよう
になつている。プラズマガスＰとしては、H2、
Ar、N2、He、CH4及びO2等の単体ガス、あるい
は、製鉄プロセスで副生される、コークス炉ガ
ス、高炉ガス、転炉ガス等が用いられる。
An embodiment of the method of the present invention will be described below with reference to the drawings. FIG. 1 is an example of a burner used to carry out the method of the present invention. In the figure, 1 is a cylindrical burner tile, and a burner body 2 is provided in the center thereof. Fuel F is placed on the outer periphery of the burner body 2.
A flow path 3 is formed, and the fuel F flows through the discharge hole 3 at the tip.
It is designed to be discharged from point a in a direction perpendicular to the axis. Further, the combustion air A is discharged from a discharge hole 1a formed tangentially in the inner circumferential wall of the burner tile, so as to form a strong swirling flame. On the other hand, a pair of plasma electrodes 4 is located at the center of the burner body 2.
is provided, and plasma gas P is supplied between the electrodes.
is heated to an extremely high temperature, and as a plasma jet,
It is designed to be injected into the strong swirling flame. As the plasma gas P, H 2 ,
Single gases such as Ar, N 2 , He, CH 4 and O 2 , or coke oven gas, blast furnace gas, converter gas, etc., which are by-produced in the steel manufacturing process, are used.
而して、空気比1.0以下での燃焼で、燃焼空気
吐出孔１ａに対する燃料吐出孔３ａの軸方向位置
を適当に定めることにより、バーナタイル１の出
側で、高温で、未燃反応分が残存すると共に遊離
イオンが存在し、かつ未反応O2が少ないか又は
余りない還元領域の火炎が形成される。この場
合、燃焼用空気は予熱することが望ましい。そし
て、上記の強旋回高温火炎中に、超高温のプラズ
マジエツトがインジエクシヨンされることによ
り、火炎温度は2000℃以上になる。こうして得ら
れた高温火炎を鋼材に衝突させることにより、鋼
材温度を900℃以上1200℃の高温域まで無酸化、
還元加熱することができる。 Therefore, by appropriately determining the axial position of the fuel discharge hole 3a with respect to the combustion air discharge hole 1a in combustion at an air ratio of 1.0 or less, unburned reaction components are removed at high temperature on the outlet side of the burner tile 1. A flame is formed in the reducing region where there are residual and free ions and little or no unreacted O 2 . In this case, it is desirable to preheat the combustion air. Then, the extremely high temperature plasma jet is injected into the above-mentioned strongly swirling high temperature flame, resulting in a flame temperature of 2000°C or higher. By colliding the high temperature flame obtained in this way with the steel material, the temperature of the steel material can be raised to a high temperature range of 900℃ to 1200℃ without oxidation.
Can be reductively heated.
次に、第２図に、第１図に示したバーナタイル
出口直後の火炎温度と、鋼板の無酸化・還元加熱
限界温度を実験的に求めた関係を示す。 Next, FIG. 2 shows the experimentally determined relationship between the flame temperature immediately after the exit of the burner tile shown in FIG. 1 and the non-oxidation/reduction heating limit temperature of the steel plate.
実験において、燃焼時の空気比を0.9一定とし、
燃料としては、コークス炉ガスを使用した。ま
た、プラズマを使用する場合、プラズマガスとし
てコークス炉ガスを使用し、供給量は、全使用量
の10％とした。プラズマの強度は、投入電力で制
御し、本実験では、0.5kW〜3.2kWの範囲で使用
した。 In the experiment, the air ratio during combustion was kept constant at 0.9,
Coke oven gas was used as the fuel. Furthermore, when using plasma, coke oven gas was used as the plasma gas, and the supply amount was 10% of the total amount used. The intensity of the plasma was controlled by the input power, and in this experiment, it was used in the range of 0.5kW to 3.2kW.
〇印はＣガス−常温空気を用いた場合で、×印
はＣガス−予熱空気、△印はＣガス−プラズマ−
予熱空気を用いたものである。予熱空気温度は、
400℃と600℃とした。プラズマを加え、火炎温度
を約2200℃とすることにより、約1200℃まで鋼材
を無酸化で加熱することが可能であることが確め
られた。 〇 mark is when C gas - room temperature air is used, × mark is C gas - preheated air, △ mark is when C gas - plasma -
It uses preheated air. The preheating air temperature is
The temperatures were 400℃ and 600℃. It was confirmed that by adding plasma and setting the flame temperature to about 2200°C, it is possible to heat steel up to about 1200°C without oxidation.
この発明の直火無酸化加熱法は、上記のような
もので鋼材を900℃以上1200℃の高温域まで直火
無酸化加熱することができる。
The direct fire non-oxidation heating method of the present invention is capable of direct fire non-oxidation heating of steel materials to a high temperature range of 900°C or higher and 1200°C.
第１図は、本発明法を実施するために用いられ
るバーナの一実施例を示す説明図、第２図は実験
結果の一例を示す説明図である。
FIG. 1 is an explanatory diagram showing an example of a burner used to carry out the method of the present invention, and FIG. 2 is an explanatory diagram showing an example of experimental results.
Claims (1)
スをインジエクシヨンすることにより火炎温度を
高め、この高温火炎を鋼材に衝突させることによ
つて鋼材を無酸化状態で加熱することを特徴とす
る直火無酸化加熱法。1 A direct flame characterized by increasing the flame temperature by injecting plasma gas into the combustion flame at an air ratio of 1.0 or less, and heating the steel material in a non-oxidizing state by colliding this high-temperature flame with the steel material. Non-oxidizing heating method.
Priority Applications (16)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19032785A JPS6250416A (en) | 1985-08-29 | 1985-08-29 | Direct flame non-oxidation heating method |
| GB8609874A GB2175684B (en) | 1985-04-26 | 1986-04-23 | Burner |
| AU56577/86A AU597883B2 (en) | 1985-04-26 | 1986-04-24 | Burner |
| DE19863614100 DE3614100A1 (en) | 1985-04-26 | 1986-04-25 | BURNER |
| FR8606086A FR2581163B1 (en) | 1985-04-26 | 1986-04-25 | BURNER FOR FLAMING STEEL MATERIALS |
| CN86102828.7A CN1009948B (en) | 1985-04-26 | 1986-04-25 | Restoration heating burner of direct flame type |
| CA000507654A CA1295229C (en) | 1985-04-26 | 1986-04-25 | Burner |
| AT0113886A AT400261B (en) | 1985-04-26 | 1986-04-28 | BURNER FOR DIRECT FLAMEING |
| BR8601899A BR8601899A (en) | 1985-04-26 | 1986-04-28 | DIRECT HEATING BURNER FOR REDUCTION |
| IT48018/86A IT1191273B (en) | 1985-08-29 | 1986-05-14 | Burner for direct heating of steel |
| US07/315,670 US4969815A (en) | 1985-04-26 | 1989-02-27 | Burner |
| US07/316,352 US4993939A (en) | 1985-04-26 | 1989-02-27 | Burner with a cylindrical body |
| US07/316,349 US4971552A (en) | 1985-04-26 | 1989-02-27 | Burner |
| US07/316,351 US4971553A (en) | 1985-04-26 | 1989-02-27 | Burner with a cylindrical body |
| US07/315,991 US5000679A (en) | 1985-04-26 | 1989-02-27 | Burner with a cylindrical body |
| US07/317,303 US4971551A (en) | 1985-04-26 | 1989-02-27 | Burner with a cylindrical body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19032785A JPS6250416A (en) | 1985-08-29 | 1985-08-29 | Direct flame non-oxidation heating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6250416A JPS6250416A (en) | 1987-03-05 |
| JPH0121205B2 true JPH0121205B2 (en) | 1989-04-20 |
Family
ID=16256336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19032785A Granted JPS6250416A (en) | 1985-04-26 | 1985-08-29 | Direct flame non-oxidation heating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6250416A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2525014Y2 (en) * | 1993-05-11 | 1997-02-05 | 株式会社永幸 | Winding tools such as continuous crimp terminals |
| JPH09183626A (en) | 1995-12-28 | 1997-07-15 | Central Glass Co Ltd | Reinforced thin glass plate |
| SE531990C2 (en) * | 2007-01-29 | 2009-09-22 | Aga Ab | Process for heat treatment of long steel products |
-
1985
- 1985-08-29 JP JP19032785A patent/JPS6250416A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6250416A (en) | 1987-03-05 |
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