JPH0234728A - Method for controlling injection of water into dip cooler in continuous annealing furnace - Google Patents
Method for controlling injection of water into dip cooler in continuous annealing furnaceInfo
- Publication number
- JPH0234728A JPH0234728A JP18175688A JP18175688A JPH0234728A JP H0234728 A JPH0234728 A JP H0234728A JP 18175688 A JP18175688 A JP 18175688A JP 18175688 A JP18175688 A JP 18175688A JP H0234728 A JPH0234728 A JP H0234728A
- Authority
- JP
- Japan
- Prior art keywords
- water
- cooling
- hot water
- tank
- amount
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 238000002347 injection Methods 0.000 title claims description 15
- 239000007924 injection Substances 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 12
- 238000000137 annealing Methods 0.000 title claims description 10
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 239000000498 cooling water Substances 0.000 claims abstract description 25
- 238000007654 immersion Methods 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 4
- 239000008235 industrial water Substances 0.000 abstract 2
- 239000002699 waste material Substances 0.000 abstract 2
- 238000004140 cleaning Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【発明の詳細な説明】
ｆ産業上の利用分野〕
本発明は金属ストリップの連続焼鈍炉における浸漬冷却
装置の注水制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water injection control method for an immersion cooling device in a continuous annealing furnace for metal strip.
〔従来の技術ｊ
金属ストリップの連続焼鈍炉の一例を第３図に示す。ス
トリップｌはペイオフリール２を払い出され、溶接機３
にて先行のストリ・シブの尾端に溶接された後、クリー
ニング装置４、入側ルーパ５を通過して焼鈍炉に入る。[Prior Art j Figure 3 shows an example of a continuous annealing furnace for metal strips. The strip l is discharged from the payoff reel 2 and is passed through the welding machine 3.
After being welded to the tail end of the preceding strip, it passes through a cleaning device 4 and an inlet looper 5 and enters an annealing furnace.
焼鈍炉は金属ストリップの熱処理を行うために加熱冷却
を行うものであり、均熱または過時効処理が含まれる場
合もある。An annealing furnace performs heating and cooling to heat treat the metal strip, and may also include soaking or overaging treatment.
第３図では入側から加熱帯６、均熱帯７、冷却帯８．９
、最終冷却帯１０と順次ならんでいる。In Figure 3, from the entrance side, heating zone 6, soaking zone 7, cooling zone 8.9
, and the final cooling zone 10.
焼鈍炉を出たストリ・シブｌは出側ルーパ１． ｌ、ス
キンパス装置１２、検査装置１３を通過し、テンション
リール１５に巻き取られる。After leaving the annealing furnace, the steel sheet passes through the outlet looper 1. 1, passes through a skin pass device 12 and an inspection device 13, and is wound onto a tension reel 15.
本発明は金属ストリップの浸漬冷却に関するものである
。浸漬冷却はその冷却能力が大きいところから、ストリ
ップの焼き入れまたは最終冷却に多く用いられている。The present invention relates to immersion cooling of metal strips. Immersion cooling is often used for quenching or final cooling of strips due to its large cooling capacity.
第３図の例では、最終冷却帯１０が浸漬冷却である。In the example of FIG. 3, the final cooling zone 10 is immersion cooling.
浸漬冷却ではストリップを冷却する時の熱により、温排
水が発生する。近年この温排水は省エネルギーの観点か
ら、工場用水として利用されてきている。第３図ではそ
の一例を示しているが、最終冷却帯ＩＯで発生した温水
Ｉ８は温水タンク１６に貯溜され、移送ポンプ１９によ
って入側温水タンク１７に移送されるにの移送された温
水は、クリーニング装置４で用いられる温水２ｏとして
利用されている６
従来の浸漬冷却における注水制御は大別して次のａ）、
ｂ）の２つの方法が採られている。In immersion cooling, the heat generated when the strip is cooled generates hot water. In recent years, this heated wastewater has been used as factory water from the perspective of energy conservation. An example of this is shown in FIG. 3, where the hot water I8 generated in the final cooling zone IO is stored in the hot water tank 16 and transferred to the inlet hot water tank 17 by the transfer pump 19. The water injection control in conventional immersion cooling can be roughly divided into the following a):
Two methods have been adopted (b).
ａ）冷却槽内液温制御
この方法では冷却槽内の液温を一定に保つために、冷却
水の注水量を制御する（特公昭５７−１１９３１）。第
４図にその一例を示す。a) Liquid temperature control in the cooling tank In this method, the amount of cooling water injected is controlled in order to keep the liquid temperature in the cooling tank constant (Japanese Patent Publication No. 57-11931). An example is shown in FIG.
ストリップｌは冷却水槽２２内に貯溜された冷却水２３
に浸漬することにより冷却される。この時、冷却水２３
の温度はストリップ１を所定の温度に冷却するために一
定温度にコントロールする必要がある。この際、冷却水
温を制御するために補給水２４が流調弁２６によって注
水制御される。補給水２４はストリップ１の持ち出しお
よび蒸発によっても消費される・が、その殆どは温水１
８として、温水タンク１６に排水される。温水タンク中
の温水は移送ポンプ１９により各使用先へ移送される。The strip l is the cooling water 23 stored in the cooling water tank 22.
It is cooled by immersing it in water. At this time, cooling water 23
It is necessary to control the temperature at a constant temperature in order to cool the strip 1 to a predetermined temperature. At this time, the supply of makeup water 24 is controlled by the flow control valve 26 in order to control the cooling water temperature. Make-up water 24 is also consumed by strip 1 removal and evaporation, but most of it is consumed by hot water 1
8, the water is drained into the hot water tank 16. The hot water in the hot water tank is transferred to each place of use by a transfer pump 19.
ｂ）一定量注水
第５図に一例を示すように、冷却槽内の液温に無関係に
一定量の水を補給水２４として注水する。b) Injecting a fixed amount of water As an example is shown in FIG. 5, a fixed amount of water is injected as make-up water 24 regardless of the liquid temperature in the cooling tank.
上記ａ）方式と異なり、冷却水槽２２の液温コントロー
ルは補給水の注水制御によるものではな（、他の方式に
よる。第３図に示した例では、冷却水２３を循環し、こ
の循環系に熱交換器３０を設け、循環水温あるいは循環
水量で冷却水２３の液温をコントロールするものである
。Unlike the method a) above, the liquid temperature in the cooling water tank 22 is not controlled by the injection of make-up water (but by another method. In the example shown in FIG. 3, the cooling water 23 is circulated, and this circulation system A heat exchanger 30 is installed in the cooling water 23, and the temperature of the cooling water 23 is controlled by the circulating water temperature or the amount of circulating water.
このような液温コントロールを行った場合、補給水はス
トリップが持ち出す量および蒸発によって減少する量を
補給すればよく、一定量を補給すべく注水バルブの開度
を一定としており、余分な補給水が温水１８として温水
タンク１６に排出されている。When such liquid temperature control is performed, it is only necessary to replenish the amount of make-up water taken out by the strip and the amount that decreases due to evaporation.The opening of the water injection valve is kept constant to replenish a constant amount, and excess make-up water is is discharged to the hot water tank 16 as hot water 18.
［発明が解決しようとする課題］
以上の従来の方式では、浸漬冷却装置からの温水の発生
量とクリーニング装置用温水等の工場用水の使用量との
バランスがとれず、発生量が多い場合には余分な温水は
ドレンとして排水し、また使用量が多い場合には、純水
などの水を補給し、さらに温度を上げるために蒸気など
の熱が必要であった。[Problems to be Solved by the Invention] In the conventional system described above, it is difficult to balance the amount of hot water generated from the immersion cooling device with the amount of factory water used such as hot water for cleaning equipment, and when the amount of generated water is large, Excess hot water was drained as a drain, and when the amount used was large, water such as pure water was replenished, and heat such as steam was required to further raise the temperature.
このアンバランスは従来の浸漬冷却装置における温排水
の発生量は冷却装置のみを考慮した冷却水の注水制御を
行っていたためであり１本発明は冷却水の注水量を工場
使用量に合わせることにより、前記の不具合を解消しよ
うとするものである。This imbalance is due to the fact that the amount of heated waste water generated in conventional immersion cooling equipment is controlled by cooling water injection taking only the cooling equipment into consideration. , which attempts to solve the above-mentioned problems.
〔課題を解決するための手段Ｊ
温水の使用量と補給水の注水量のバランスが崩れると、
冷却槽から排出された温水の温水タンクレベルが変化す
る。すなわち、温水の使用量が多いとタンクレベルが低
下し、また少ないとタンクレベルが上昇する。[Means to solve the problem J: If the balance between the amount of hot water used and the amount of makeup water injected is disrupted,
The hot water tank level of hot water discharged from the cooling tank changes. That is, if the amount of hot water used is large, the tank level will decrease, and if the amount of hot water used is small, the tank level will increase.
そこで温水の工場使用量に応じて冷却槽への補給水の注
水量を制御することにより、温水の使用量に応じて、補
給水を注水することができる。またさらに温水タンクの
レベル変化に応じて注水Ｉを補正することによって安定
した注水制御を行うことができる。Therefore, by controlling the amount of make-up water injected into the cooling tank according to the amount of hot water used in the factory, make-up water can be injected in accordance with the amount of hot water used. Furthermore, stable water injection control can be performed by correcting water injection I in accordance with changes in the level of the hot water tank.
〔作用］ 第１図に本発明の実施例を示す。[Effect] FIG. 1 shows an embodiment of the present invention.
ストリップｌは冷却槽２２に溜められた冷却水２３に浸
漬することにより冷却される６冷却水２３はストリップ
の熱を奪うことにより温度上昇するが、本例に示す如く
、冷却水の循環系を設けて槽内の冷却水温をコントロー
ルすればよい。２５は液温計、２８は循環ポンプ、２９
はコントロールバルブ、３０は熱交換器である。The strip l is cooled by being immersed in the cooling water 23 stored in the cooling tank 22.The temperature of the cooling water 23 rises by taking away the heat from the strip, but as shown in this example, the cooling water circulation system is The temperature of the cooling water in the tank can be controlled. 25 is a liquid thermometer, 28 is a circulation pump, 29
30 is a control valve, and 30 is a heat exchanger.
この例に示した水温制御方法は一例であって、本発明を
何ら限定するものではな（、例えば循環水を温水タンク
１６から取り出し熱交換器を通しで冷却水槽２２に供給
してもよい。The water temperature control method shown in this example is an example and does not limit the present invention in any way (for example, circulating water may be taken out from the hot water tank 16 and supplied to the cooling water tank 22 through a heat exchanger.
冷却槽への補給水２４はコントロールバルブ３２を介し
て冷却槽２２へ注水されるが、ストノツプの持ち出しお
よび蒸発によって消費された残りの冷却水は温水１８と
して温水タンク１６に０１出される。この時温水の排出
は冷却槽からのオーバーフローによって行うのが好まし
い。これは冷却槽内の冷却液面レベルを一定に保つため
であり、ストリップの浸漬長を一定にすることで、冷却
能力を確保することができる６
温水タンク１６に溜められた温水１８は移送ポンプ１９
によって工場用水として、例えばクリーニング装置など
に移送される。この時、移送ポンプ１９による移送量と
、補給水の注水量およびストリップの持ち出し量、蒸発
Ｉの差が温水タンク１６のレベル変化として現れる。そ
こで工場の温水使用量を流量計３７で測定し、補給量演
算装置３８によって、補給水の注水量の設定を行・）。Make-up water 24 to the cooling tank is injected into the cooling tank 22 through the control valve 32, but the remaining cooling water consumed by the removal of the stopper and evaporation is discharged into the hot water tank 16 as hot water 18. At this time, hot water is preferably discharged by overflow from the cooling tank. This is to keep the level of the cooling liquid in the cooling tank constant, and by keeping the immersion length of the strip constant, the cooling capacity can be secured6.The hot water 18 stored in the hot water tank 16 is pumped 19
The water is then transferred to, for example, cleaning equipment as factory water. At this time, the difference between the amount transferred by the transfer pump 19, the amount of makeup water injected, the amount of strip taken out, and the evaporation I appears as a change in the level of the hot water tank 16. Therefore, the amount of hot water used in the factory is measured with a flow meter 37, and the amount of replenishment water to be injected is set using the replenishment amount calculation device 38.
このようにすれば使用量と供給量との差は小さくなり、
温水タンク１６のレベル変化はほとんどなくなる。しか
しながら、工場使用量をそのまま補給水量の設定とする
と、ストリップが持ち出す水量および蒸発によって消費
される水量が不足するため、補給水の設定水量には、こ
れらの水量を考慮して、多めの設定を行う、この時、一
定量を加算して補給水量を設定してもよいが、ストリッ
プのサイズラインスピード、冷却槽人口板温により、ス
トリップの持ち出す水量および蒸発水量が異なるため、
一定Ｉの加算ではこれらの水量を補正することができな
い。In this way, the difference between the amount used and the amount supplied will be smaller,
There is almost no change in the level of the hot water tank 16. However, if the make-up water amount is set based on the factory usage amount, the amount of water carried out by the strip and the amount of water consumed by evaporation will be insufficient, so the set amount of make-up water should be set a little higher, taking these water amounts into consideration. At this time, you can set the make-up water amount by adding a certain amount, but the amount of water taken out by the strip and the amount of evaporated water will differ depending on the size of the strip, line speed, and cooling tank temperature.
These water amounts cannot be corrected by adding a constant I.
そこでレベル計３６を温水タンク１６に設置し、温水タ
ンク１６のレベルが一定となるように補給量演算装置３
８に信号を送り補給水２４の補給量制御器３９を作動さ
せる。このようにすれば温水の消費量と同量を確実に補
給水量として設定することができる。Therefore, a level meter 36 is installed in the hot water tank 16, and the replenishment amount calculation device 3 is set so that the level of the hot water tank 16 is constant.
8 to operate the replenishment amount controller 39 for the replenishment water 24. In this way, it is possible to reliably set the amount of make-up water equal to the consumption amount of hot water.
〔実施例１
本発明による注水制御を実施した結果を以下に示す。冷
延鋼板の連続焼鈍炉の最終冷却帯における注水制御に本
発明方法を適応した。本方法による効果を確認するため
に、従来方法との比較テストを実施した。[Example 1] The results of water injection control according to the present invention are shown below. The method of the present invention was applied to water injection control in the final cooling zone of a continuous annealing furnace for cold-rolled steel sheets. In order to confirm the effectiveness of this method, we conducted a comparative test with conventional methods.
テスト条件としてはストリップ０．８ｍｍしＸ１１５０
ｍｍＷを４００ｍｐｍで通板した。最終冷却帯は第１図
と同型式のものを設置した。The test conditions are strip 0.8mm and X1150.
The plate was passed through at a mmW of 400 mpm. The final cooling zone was of the same type as shown in Figure 1.
ストリップは２５０℃で浸漬冷却を開始し、８０℃まで
冷却される。この時、冷却槽の水温は６５°Ｃであった
。また温水はクリーニング装置で利用され、その使用量
は１ｓｔｒｆ’／ｈであった。The strip begins immersion cooling at 250°C and is cooled to 80°C. At this time, the water temperature in the cooling tank was 65°C. Further, hot water was used in the cleaning device, and the amount used was 1 strf'/h.
この冷却装置を用いて第４図に示すような注水による液
温制御を実施したところ、補給水として１２７ｍ’／ｈ
もの多量の冷却水を必要とし、この殆ど全量が温水タン
クへ排出された。温水タンクからはクリーニング装置へ
１８ｒｒｌ’／ｈ移送されているが、残りの１０９ｒｒ
１″／ｈの渇水はドレンとして温水タンクより排水され
た。また同様に第５図に示すような一定流量の補給水と
して５ｒｒ１′／ｈを冷却槽へ注水した。本方式では移
送ポンプは温水タンクのレベルにより間欠運転を行って
いる。この場合、クリーニング装置の温水消費量に対し
て移送量が少ないため、クリーニング装置において温水
を作る必要が生じる。When this cooling device was used to control the liquid temperature by water injection as shown in Figure 4, the amount of make-up water was 127 m'/h.
A large amount of cooling water was required, and almost all of this was discharged into the hot water tank. 18rrl'/h is transferred from the hot water tank to the cleaning device, but the remaining 109rrl'/h
1''/h of dry water was drained from the hot water tank as drain. Similarly, as shown in Figure 5, 5rr1'/h of water was injected into the cooling tank as a constant flow of make-up water. In this method, the transfer pump is used to drain hot water. Intermittent operation is performed depending on the level of the tank.In this case, since the amount of transferred water is small compared to the amount of hot water consumed by the cleaning device, it is necessary to generate hot water in the cleaning device.
この時クリーニング装置では１３ｒｎ’／ｈの純水およ
びこの純水を６５℃まで昇温するために約１ ｔ／ｈの
蒸気を消費した。At this time, the cleaning device consumed 13 rn'/h of pure water and about 1 t/h of steam to raise the temperature of this pure water to 65°C.
これに対し第１図に示した本発明による注水制御を実施
した結果、クリーニング装置への温水移送量はｌ ８
ｒｒ？ ／ ｈと安定し、また注水量は温水レベルに応
じて約１８ｒｒ？／ｈと安定した注水制御ができた。On the other hand, as a result of implementing the water injection control according to the present invention shown in FIG. 1, the amount of hot water transferred to the cleaning device was 18
rr? / h and the amount of water injected is about 18rr depending on the hot water level. /h, stable water injection control was achieved.
なお、第１図は冷却水槽が一槽タイブの実施例であるが
、連続焼鈍炉出側にスキンバスが設置されている場合、
冷却水槽出口板温は５０℃以下が良いとされている。−
槽タイプではストリップのサイズ変化、ラインスピード
変化に対して出口板温５０℃を制御できない場合がある
。Although Fig. 1 shows an example in which the cooling water tank is a single tank type, if a skin bath is installed on the outlet side of the continuous annealing furnace,
It is said that the plate temperature at the outlet of the cooling water tank is preferably 50°C or less. −
In the tank type, it may not be possible to control the outlet plate temperature of 50°C in response to changes in strip size and line speed.
そこで冷却水槽を複数槽設けて段階的に板温を下げる方
式が考えられる。第２図は２槽タイプの冷却装置に本発
明を適用した例である。Therefore, a method can be considered in which multiple cooling water tanks are provided to lower the plate temperature in stages. FIG. 2 shows an example in which the present invention is applied to a two-tank type cooling device.
〔発明の効果１
以上述べた如く、本発明による注水制御を行うことによ
り、ストリップの冷却時に発生する温水を効率よく利用
することができる。[Effect of the Invention 1] As described above, by performing the water injection control according to the present invention, it is possible to efficiently utilize the hot water generated when cooling the strip.
第１図、第２図は本発明の実施例のフローシート、第３
図は連続焼鈍装置の全体模式図、第４図、第５図は従来
例のフローシートである。
ｌ・・−ストリップ、２−・・ペイオフリール、３・・
・溶接機、４・・−クリーニング装置、５・・・入口ル
ーバ、６・・・加熱帯、７・・・均熱帯、８．９・・−
冷却帯、１０・・−最終冷却帯、１１・・・出ＩＩＩル
ーパ、１２・・・スキンバス装置、１３・・・検査装置
、１５−・・テンションリール、１６−・・温水タンク
、１７・−・入側温水タンク、１８・・−温水、１９・
・・移送ポンプ、２０・・−温水、２２・−冷却槽、２
３・・・冷却水、２４−・・補給水、２５−液温計、２
８−・−１盾環ポンプ、２９．３２−・コントロールバ
ルブ、３０・・−熱交換器、３６・・−レベル計、３７
・・・流量計、３８−・・補給量演算装置、３９−・・
補給量制御器。Figures 1 and 2 are flow sheets of embodiments of the present invention;
The figure is an overall schematic diagram of a continuous annealing apparatus, and FIGS. 4 and 5 are flow sheets of a conventional example. l...-Strip, 2-...Payoff reel, 3...
・Welding machine, 4...-Cleaning device, 5...Inlet louver, 6...Heating zone, 7...Soaking zone, 8.9...-
Cooling zone, 10... Final cooling zone, 11... Output III looper, 12... Skin bath device, 13... Inspection device, 15-... Tension reel, 16-... Hot water tank, 17... -・Inlet hot water tank, 18・・・Hot water, 19・
・・Transfer pump, 20・・−Hot water, 22・−Cooling tank, 2
3... Cooling water, 24-... Make-up water, 25- Liquid thermometer, 2
8--1 shield ring pump, 29.32--control valve, 30--heat exchanger, 36--level meter, 37
...Flow meter, 38-...Replenishment amount calculation device, 39-...
Replenishment amount controller.
Claims (1)
浸漬冷却に用いる冷却水を補給し、そのオーバーフロー
温排水を工場用水として利用する冷却制御において、該
温排水の使用流量に応じて補給水の注水量を制御するこ
とを特徴とする浸漬冷却装置の注水制御方法。1. In cooling control that replenishes the cooling water used for immersion cooling to the immersion cooling tank in a continuous annealing furnace for metal strips and uses the overflow warm wastewater as factory water, the amount of make-up water injected is adjusted according to the flow rate of the hot wastewater used. A water injection control method for an immersion cooling device characterized by controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18175688A JPH0234728A (en) | 1988-07-22 | 1988-07-22 | Method for controlling injection of water into dip cooler in continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18175688A JPH0234728A (en) | 1988-07-22 | 1988-07-22 | Method for controlling injection of water into dip cooler in continuous annealing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0234728A true JPH0234728A (en) | 1990-02-05 |
| JPH0583617B2 JPH0583617B2 (en) | 1993-11-26 |
Family
ID=16106338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18175688A Granted JPH0234728A (en) | 1988-07-22 | 1988-07-22 | Method for controlling injection of water into dip cooler in continuous annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0234728A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289813A (en) * | 1991-08-28 | 1994-03-01 | Aisin Seiki Kabushiki Kaisha | Two speed mechanical supercharger |
| JP2021042408A (en) * | 2019-09-09 | 2021-03-18 | 日本製鉄株式会社 | Method and apparatus for manufacturing heat-treated steel strip |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711931A (en) * | 1980-06-25 | 1982-01-21 | Sumitomo Chem Co Ltd | Production of allyl alcohol |
| JPS5756532A (en) * | 1980-09-16 | 1982-04-05 | Unitika Ltd | Production of wavy flat low crimped yarn |
| JPS6347341A (en) * | 1986-08-18 | 1988-02-29 | Mitsubishi Heavy Ind Ltd | Method for recovering heat of metallic strip |
-
1988
- 1988-07-22 JP JP18175688A patent/JPH0234728A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711931A (en) * | 1980-06-25 | 1982-01-21 | Sumitomo Chem Co Ltd | Production of allyl alcohol |
| JPS5756532A (en) * | 1980-09-16 | 1982-04-05 | Unitika Ltd | Production of wavy flat low crimped yarn |
| JPS6347341A (en) * | 1986-08-18 | 1988-02-29 | Mitsubishi Heavy Ind Ltd | Method for recovering heat of metallic strip |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289813A (en) * | 1991-08-28 | 1994-03-01 | Aisin Seiki Kabushiki Kaisha | Two speed mechanical supercharger |
| JP2021042408A (en) * | 2019-09-09 | 2021-03-18 | 日本製鉄株式会社 | Method and apparatus for manufacturing heat-treated steel strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0583617B2 (en) | 1993-11-26 |
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