JPH01283352A - Galvanealing furnace - Google Patents
Galvanealing furnaceInfo
- Publication number
- JPH01283352A JPH01283352A JP11154788A JP11154788A JPH01283352A JP H01283352 A JPH01283352 A JP H01283352A JP 11154788 A JP11154788 A JP 11154788A JP 11154788 A JP11154788 A JP 11154788A JP H01283352 A JPH01283352 A JP H01283352A
- Authority
- JP
- Japan
- Prior art keywords
- zone
- heating zone
- furnace
- heating
- holding
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 63
- 230000006698 induction Effects 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 abstract description 3
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract 8
- 238000005275 alloying Methods 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000007747 plating Methods 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 238000007865 diluting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は溶融亜鉛めっき直後のストリップを加熱及び保
熱することにより合金化層を形成させる合金化熱処理炉
、即ちガルバニール炉に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an alloying heat treatment furnace, that is, a galvanil furnace, in which an alloyed layer is formed by heating and heat-retaining a strip immediately after hot-dip galvanizing.
〈従来の技術〉
近年合金化処理鋼板は自動車、家庭電気器具等に益々多
く採用されており、−層高品質のものが要求されている
。<Prior Art> In recent years, alloyed steel sheets have been increasingly used in automobiles, home appliances, etc., and high-quality steel sheets are required.
従来の合金化炉は直火加熱帯、保持帯をめっきポットの
上部に直列に配置したもの（特開昭６０−１４９７５９
号）、又は誘導加熱帯、直火加熱帯、保持帯をめっきポ
ットの上部に直列に配置したもの（特開昭６１−２０７
５６４号）が知られている。この後者の誘導加熱帯、直
火加熱帯、保持帯を直列に配したものは、直火加熱及び
誘導加熱の長所、欠点を検討し、それぞれの長所を取り
入れたものといえる。The conventional alloying furnace has a direct heating zone and a holding zone arranged in series above the plating pot (Japanese Patent Application Laid-Open No. 60-149759).
No.), or one in which an induction heating zone, a direct flame heating zone, and a holding zone are arranged in series above the plating pot (Japanese Patent Laid-Open No. 61-207
No. 564) is known. This latter method, in which an induction heating zone, a direct flame heating zone, and a holding zone are arranged in series, can be said to be the result of considering the advantages and disadvantages of direct flame heating and induction heating, and incorporating the advantages of each.
しかしこれらは、いずれのタイプにしても長い煙突形状
をしているため、炉内高温ガスのドラフト効果による侵
入エアーが多量に存在し、熱効率の低下をまねくばかり
でなく加熱ムラを発生させ品質の低下にもつながってい
る。However, since these types have a long chimney shape, a large amount of air enters due to the draft effect of high-temperature gas inside the furnace, which not only reduces thermal efficiency but also causes uneven heating and deteriorates quality. It also leads to a decline.
従来の合金化炉ではドラフトによる侵入エアーが燃焼用
空気の約６倍にも達しており、この侵入エアーを加熱す
る為に投入燃料の約６０％が費やされている。In conventional alloying furnaces, the amount of intruding air due to draft is about six times that of combustion air, and about 60% of the input fuel is used to heat this intruding air.
また、その構造の概観は第２図に示すような配置になっ
ているが、加熱保持後のストリップが完全に冷却される
前にトップロール１６に接触した場合には、ロールに亜
鉛が付着し表面疵の原因となり、品質の低下をもたらし
ている。In addition, although the structure is arranged as shown in Figure 2, if the strip comes into contact with the top roll 16 before being completely cooled after being heated and held, zinc may adhere to the roll. This causes surface flaws, leading to a decline in quality.
一方、完全に冷却させてから方向転換させようとすると
保持帯の上方に長い冷却帯を必要とするので合金化炉全
体が高くなり建屋を含めたコストが非常に高くなる。On the other hand, if the direction is changed after complete cooling, a long cooling zone is required above the holding zone, which increases the height of the entire alloying furnace and the cost including the building.
〈発明が解決しようとする課題〉
本発明は、合金化炉内のドラフトを押え、侵入エアーを
防止し、加熱効率を高め、均一加熱を実施し、最適加熱
、最適保持を可能とするガルバニール炉を提供するもの
である。<Problems to be Solved by the Invention> The present invention provides a galvanyl furnace that suppresses drafts in the alloying furnace, prevents air from entering, increases heating efficiency, performs uniform heating, and enables optimal heating and optimal holding. It provides:
また加熱、保持後のストリップがある一定の温度以下ま
でロール等に接触しないように搬送、冷却し、表面疵を
も防止したガルバニール炉を提供するものである。The present invention also provides a galvanil furnace in which the heated and held strip is transported and cooled to a temperature below a certain level without contacting rolls, etc., and surface flaws are also prevented.
〈課題を解決するだめの手段〉
本発明は溶融亜鉛めっきポットの上部に誘導加熱帯、直
火加熱帯、保持帯及び冷却帯を直列に配したガルバニー
ル炉において、誘導加熱帯入側部。<Means for Solving the Problems> The present invention provides a galvaneal furnace in which an induction heating zone, a direct flame heating zone, a holding zone, and a cooling zone are arranged in series on the upper part of a hot-dip galvanized pot, at the entrance side of the induction heating zone.
誘導加熱帯と直火加熱帯の接続部、直火加熱帯と保持帯
の接続部及び保持帯出側部に夫々ガスシール装置を設け
たことを特徴とするガルバニール炉であり、望ましくは
誘導加熱帯入側部のガスシール装置には直火加熱帯から
の排ガスを導入できるように配管したものであり、また
保持帯の上部に、或いは冷却帯の上部に非接触方式によ
りストリップの移送方向を転換させるガスパッドを設け
たものである。A galvaneal furnace is characterized in that a gas sealing device is provided at the joint between the induction heating zone and the direct-fired heating zone, at the joint between the direct-fired heating zone and the retention zone, and at the exit side of the retention zone. The gas seal device on the inlet side is equipped with piping to introduce the exhaust gas from the direct-fired heating zone, and the direction of conveyance of the strip can be changed using a non-contact method at the top of the holding zone or the top of the cooling zone. It is equipped with a gas pad.
〈作 用〉
次に本発明を一実施例である第１図に基づいて説明する
。<Function> Next, the present invention will be explained based on FIG. 1, which is an embodiment.
めっきポット１を出たストリップ２は誘導加熱帯４及び
直火加熱帯６からなる加熱帯１３で所定温度に加熱され
、保持帯８で一定時間保熱後冷却帯１０、１２により冷
却される。１４は亜鉛目付量調整用ワイピングノズルで
ある。加熱１１１３ではまず誘導加熱帯４の入口開口部
からの侵入エアーを防止するためにガスシール装Ｗ３を
設置する。このガスシール装置３に直火加熱帯６の排ガ
スを常温空気で稀釈した熱風（４５０〜６００°Ｃ）を
用いることにより、ストリップ２が予熱され炉の熱効率
を高めるので望ましい。なおこの実施例では流体パッド
タイツのガスシール装置が図示されているが、エアーカ
ーテンタイプのガスシール装置も採用できる。The strip 2 leaving the plating pot 1 is heated to a predetermined temperature in a heating zone 13 consisting of an induction heating zone 4 and a direct flame heating zone 6, and after being kept in a holding zone 8 for a certain period of time, it is cooled in cooling zones 10 and 12. 14 is a wiping nozzle for adjusting the zinc coating amount. In the heating step 1113, a gas sealing device W3 is first installed to prevent air from entering through the inlet opening of the induction heating zone 4. It is desirable to use hot air (450 to 600° C.) obtained by diluting the exhaust gas from the direct-fired heating zone 6 with air at room temperature in the gas sealing device 3 because the strip 2 is preheated and the thermal efficiency of the furnace is increased. Although this embodiment shows a fluid pad tights gas seal device, an air curtain type gas seal device may also be used.
次に誘導加熱帯４でストリップは急速加熱される。この
誘導加熱帯４は仮継ぎ時等の非定常時には、応答性の良
くない直火加熱帯の加熱過不足を速い応答性により補う
ことができる。The strip is then rapidly heated in induction heating zone 4. This induction heating zone 4 can compensate for the excessive or insufficient heating of the direct-fired heating zone, which does not have good response, with its quick response during unsteady conditions such as during temporary jointing.
誘導加熱帯４の出側で直火加熱帯６への接続部のガスシ
ール装置５は炉内のドラフトを防止するとともに、直火
加熱帯６の高温排ガスが誘導加熱帯４に流入し、誘導コ
イル（図示せず）を過加熱することを防止する。ここで
利用するガスは直火加熱帯６の排ガスを空気で稀釈した
熱風がストリップ温度低下防止のためには望ましい。The gas sealing device 5 at the connection part to the direct-fired heating zone 6 on the exit side of the induction heating zone 4 prevents drafts in the furnace, and also prevents the high-temperature exhaust gas from the direct-fired heating zone 6 from flowing into the induction heating zone 4, causing induction heating. Prevent overheating of the coil (not shown). The gas used here is preferably hot air obtained by diluting the exhaust gas from the open heating zone 6 with air in order to prevent the strip temperature from decreasing.
直火加熱帯６ではストリップ２は直火バーナ（図示せず
）により最終合金化温度（５００〜７００’Ｃ）まで加
熱される。In the open heating zone 6 the strip 2 is heated to the final alloying temperature (500-700'C) by an open burner (not shown).
直火加熱帯６の出側で保持帯８への接続部のガスシール
装置７は炉内のドラフトを防止する以外に、高温の排ガ
ス（９００〜１２００°Ｃ）がそのまま保持帯８に侵入
し、保持帯温度が上昇することも防止する。従ってこの
ガスシール装置７では直火加熱帯６からの上昇排ガスが
保持温度（５００〜７００°Ｃ）になるように冷風を用
いるか、又は直火加熱帯６から導いた排ガスを空気で稀
釈して、保持温度にした熱風を用いる。この例では冷風
によるガスシールを行い保持帯に流れる排ガス温度を保
持温度に制御している。The gas seal device 7 at the connection to the holding zone 8 on the outlet side of the direct-fired heating zone 6 not only prevents drafts in the furnace, but also prevents high-temperature exhaust gas (900 to 1200°C) from directly entering the holding zone 8. , it also prevents the retention zone temperature from increasing. Therefore, in this gas sealing device 7, cold air is used so that the rising exhaust gas from the open heating zone 6 reaches a holding temperature (500 to 700°C), or the exhaust gas led from the open heating zone 6 is diluted with air. Use hot air at a holding temperature. In this example, the temperature of the exhaust gas flowing into the holding zone is controlled to the holding temperature by performing gas sealing with cold air.
保持帯出側部のガスシール装置９では炉内のドラフトを
防止すると共に、保持帯８と冷却帯１０のガスの流れを
分断し、冷却ＩＦ １０に比較的高温の排ガスが流入し
て冷却効率を低下させることを防ぐ。The gas seal device 9 on the outlet side of the retention zone prevents drafts in the furnace, and also separates the gas flow between the retention zone 8 and the cooling zone 10, allowing relatively high temperature exhaust gas to flow into the cooling IF 10 and improving cooling efficiency. prevent deterioration.
なお冷却帯１０の上部に合金化後の高温のストリップを
非接触で方向転換させるガスパッド１１を配置し、従来
トップロール１６で発生していた亜鉛のロール表面への
イリ着による表面疵の発生を完全に無（している。この
例ではガスパッド１１は冷却帯１０の上部に配置してい
るが、保持４ｉＦの上部にガスシール装置９を介して直
接配置することもできる。In addition, a gas pad 11 is placed above the cooling zone 10 to change the direction of the high-temperature strip after alloying in a non-contact manner, thereby eliminating the occurrence of surface flaws due to smearing of the zinc onto the roll surface, which conventionally occurs with the top roll 16. In this example, the gas pad 11 is placed above the cooling zone 10, but it can also be placed directly above the holder 4iF via the gas seal device 9.
この場合には炉高をさらに低くできるのでより経済的で
ある。In this case, the height of the furnace can be further reduced, making it more economical.
ところで各ガスシールの構造は公知の流体パッド又はガ
スカーテンのどちらでもよい。Incidentally, the structure of each gas seal may be either a known fluid pad or a gas curtain.
〈発明の効果〉
以上のように本発明においては、各併入側及び出側にガ
スシール装置を用いるので、侵入エアーはほぼ完全に防
止でき、さらにストリップの予熱もできるので、加熱効
率は従来の約２０％が約４０％に向上する。<Effects of the Invention> As described above, in the present invention, since a gas seal device is used on each inlet side and outlet side, intrusion air can be almost completely prevented, and the strip can also be preheated, so the heating efficiency is higher than that of the conventional one. This increases from about 20% to about 40%.
また各帯の入側及び出側にガスシール装置を設置したこ
とにより前後の帯から流入するガスを制御でき、各帯独
自の温度制御が応答性良く、かつ高い精度で行い得るた
め、種々の合金化処理鋼板を安定した品質で製造ができ
る。In addition, by installing gas seal devices on the inlet and outlet sides of each zone, it is possible to control the gas flowing in from the front and rear zones, and the unique temperature control of each zone can be performed with good responsiveness and high precision, making it possible to perform various Alloyed steel sheets can be manufactured with stable quality.
トップロールにかわって、非接触式方向転換装置である
ガスパッドを使用することにより、これまで発生してい
たトップロールによる表面疵が皆無になる。By using a gas pad, which is a non-contact direction changing device, in place of the top roll, surface flaws caused by the top roll that have occurred up until now are completely eliminated.
また、この設（ＲＷ配装により合金化炉全体を低くする
ことができると共に、高品質の合金化めっき鋼板を安価
で安定して製造できる。In addition, this setup (RW arrangement) allows the entire alloying furnace to be made lower in height, and high-quality alloyed plated steel sheets can be produced stably at low cost.
第１図は本発明のガルバニール炉の一実施例を示す断面
図、第２図は従来のガルバニール炉の断面図である。
１・・・めっきポット、 ２・・・ストリップ、３
・・・ガスシール装置、 ４・・・誘導加熱帯、５・・
・ガスシール装置、 ６・・・直火加熱帯、７・・・ガ
スシール装置、 ８・・・保熱帯、９・・・ガスシール
装置、 １０・・・冷却帯、１１・・・ガスパッド、
１２・・・冷却帯、１３・・・加熱帯、
１４・・・ワイピングノズル、１５・・・ブロワ、１６
・・・トップロール。
特許出願人 川崎製鉄株式会社
第１図
「
第２図
一一一 ＩＲFIG. 1 is a cross-sectional view showing an embodiment of the galvaneal furnace of the present invention, and FIG. 2 is a cross-sectional view of a conventional galvaneal furnace. 1... Plating pot, 2... Strip, 3
...Gas seal device, 4...Induction heating zone, 5...
・Gas seal device, 6...Direct fire heating zone, 7...Gas seal device, 8...Insulation zone, 9...Gas seal device, 10...Cooling zone, 11...Gas pad ,
12... Cooling zone, 13... Heating zone,
14... Wiping nozzle, 15... Blower, 16
...Top roll. Patent Applicant Kawasaki Steel Corporation Figure 1 "Figure 2 111 IR
Claims (1)
熱帯、保持帯及び冷却帯を直列に配したガルバニール炉
において、誘導加熱帯入側部、誘導加熱帯と直火加熱帯
の接続部、直火加熱帯と保持帯の接続部及び保持帯出側
部に夫々ガスシール装置を設けたことを特徴とするガル
バニール炉。 ２、請求項１記載の誘導加熱帯入側部のガスシール装置
には直火加熱帯からの排ガスを導入できるように配管し
たことを特徴とするガルバニール炉。 ３、請求項１記載の保持帯の上部に、或いは冷却帯の上
部に非接触方式によりストリップの移送方向を転換させ
るガスパッドを設けたことを特徴とするガルバニール炉
。[Claims] 1. In a galvaneal furnace in which an induction heating zone, a direct flame heating zone, a holding zone, and a cooling zone are arranged in series on the upper part of a hot-dip galvanized pot, the induction heating zone entry side and the induction heating zone and A galvaneal furnace characterized in that a gas sealing device is provided at each of the connecting portion of the fire heating zone, the connecting portion of the direct flame heating zone and the holding zone, and the exit side of the holding zone. 2. A galvaneal furnace, characterized in that the gas seal device at the entrance side of the induction heating zone according to claim 1 is provided with piping so that exhaust gas from the direct-fired heating zone can be introduced. 3. A galvaneal furnace, characterized in that a gas pad is provided above the holding zone or above the cooling zone according to claim 1, for changing the direction of conveyance of the strip in a non-contact manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11154788A JPH01283352A (en) | 1988-05-10 | 1988-05-10 | Galvanealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11154788A JPH01283352A (en) | 1988-05-10 | 1988-05-10 | Galvanealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01283352A true JPH01283352A (en) | 1989-11-14 |
Family
ID=14564148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11154788A Pending JPH01283352A (en) | 1988-05-10 | 1988-05-10 | Galvanealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01283352A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008044716A1 (en) * | 2006-10-13 | 2008-04-17 | Nippon Steel Corporation | Apparatus and process for producing steel sheet plated by hot dipping with alloyed zinc |
| JP2008115462A (en) * | 2006-10-13 | 2008-05-22 | Nippon Steel Corp | Apparatus and method for producing galvannealed steel sheet |
-
1988
- 1988-05-10 JP JP11154788A patent/JPH01283352A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008044716A1 (en) * | 2006-10-13 | 2008-04-17 | Nippon Steel Corporation | Apparatus and process for producing steel sheet plated by hot dipping with alloyed zinc |
| JP2008115462A (en) * | 2006-10-13 | 2008-05-22 | Nippon Steel Corp | Apparatus and method for producing galvannealed steel sheet |
| US8402909B2 (en) | 2006-10-13 | 2013-03-26 | Nippon Steel & Sumitomo Metal Corporation | Production facility and production process for hot dip galvannealed steel plate |
| US8844462B2 (en) | 2006-10-13 | 2014-09-30 | Nippon Steel & Sumitomo Metal Corporation | Production facility and production process for hot dip galvannealed steel plate |
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