JPS62177126A - Method for continuously annealing strip - Google Patents
Method for continuously annealing stripInfo
- Publication number
- JPS62177126A JPS62177126A JP1776486A JP1776486A JPS62177126A JP S62177126 A JPS62177126 A JP S62177126A JP 1776486 A JP1776486 A JP 1776486A JP 1776486 A JP1776486 A JP 1776486A JP S62177126 A JPS62177126 A JP S62177126A
- Authority
- JP
- Japan
- Prior art keywords
- atmospheric gas
- furnace
- steel strip
- annealing furnace
- 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.)
- Pending
Links
- 238000000137 annealing Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 50
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
【産業上の利用分野】
本発明は新たな雰囲気ガスの炉内への送気はを少なくし
て行なうことの出来る鋼帯の連続焼鈍方法に関するもの
である。
【従来技術及び問題点］
一般に冷間圧延を行なったステンレス鋼などの鋼帯の連
続焼鈍方法は、第２図に光輝焼鈍の場合の実施状態を示
すように、ｕＡ帯１０走行経路の上流側から入側シュー
ト部３．トップロール４．加熱ゾーン５及び冷却ゾーン
６が順次配置された連続焼鈍炉（焼鈍炉と略記すること
がある）２を使用して次のように実施している。
鋼帯１を焼鈍炉２中に走行せしめ、入側シュート部３の
末端で（・ツブロール４により移動方向を上向きから下
向きに反転せしめ、その後に加熱ゾーン５で加熱し、更
に冷却ゾーン６によって冷却する。
この場合、鋼帯１が加熱中に酸化してテンパーカラーが
生ずるのを防止するために、焼鈍炉２内には水素と窒素
との混合ガス、アンモニアの分解ガス等の還元性雰囲気
ガスを充満しておくのである。しかしながら焼鈍中にお
いては、鋼帯１が焼鈍炉２内に持込む水分によって雰囲
気ガス中の水分量が増加して、雰囲気ガスの還元能力を
低下させるので、その防止のために従来がなりの間の新
しい雰囲気ガスを常時焼鈍炉２内に送気しており、この
新たな送気量に相当する雰囲気ガスは入側もしくは出側
のシール部１０より焼鈍炉２外に放出されていた。この
雰囲気ガスの焼鈍炉２内への送気は、例えば第２図の如
く流量計８を見て所定量をコントロールバルブ７の操作
により送気口９から行なっており、そして送気箇所は鋼
帯１が最も酸化し易い状態にある加熱ゾーン５の下部も
しくは、冷却ゾーン６の上部とするのが普通である。
（発明が解決しようとする問題点］
上記の如く焼鈍炉内の雰囲気ガス中の水分量な鋼帯１が
酸化しない範囲内に少なく保つことが必要であるため、
従来の連続焼鈍方法においては常にかなりの聞の新しい
雰囲気ガスを送気し続けなければならなかった。
しかしながら、この雰囲気ガスのコストはがなり高価で
連続焼鈍コスト中にがなりのウェイトを占めている。従
ってコスト低減のためには、雰囲気ガスの流量を出来る
だけ絞ることが望ましい一方、品質面からは逆に流量を
増やして焼鈍炉内の雰囲気ガス中の水分量を下げる必要
があった。
すなわち、上記従来の連続焼鈍方法では、コスト上昇か
それでなければ品質低下を避けられない問題点があった
。
【問題点を解決するための手段１
本発明者は以上のような従来技術の問題点に鑑み、新し
い雰囲気ガスの送気量を少なくし、しがも焼鈍炉内の雰
囲気ガス中の水分量を減少させて銅帯の品質の維持、向
上を図ることを共に達成する口との出来る連続焼鈍方法
の提供を目的として検討した結果、焼鈍炉内の雰囲気ガ
スの一部を循環し、その際に雰囲気ガスの汚れ、水分を
除去すれば、新しい雰囲気ガスとして再使用することが
可能であることを究明して、本発明を完成したのである
。
すなわち本発明は、新しい雰囲気ガスを炉内に送気しな
から鋼帯を走行せしめて連続焼鈍を行なうに際し、炉内
の雰囲気ガスの一部を連続的に炉外に取り出して濾過及
び乾燥処理を施してから炉内に送気する循環を行なうこ
とにより、新しい雰囲気ガスの送気ｍを少なくすること
を特徴とする鋼帯の連続焼鈍方法に関するものである。
【構成の説明１
以下、本発明方法を図によって詳細に説明する。
第１図は連続−焼鈍炉を使用する場合の本発明方法の実
施状態を示す説明図である。
焼鈍炉２内への新しい雰囲気ガスの送気は従来通り、例
えば第１図の如く冷却ゾーン６の上部に設けた送気口９
より行なう。この雰囲気ガスは大部分加熱ゾーン５．入
側シュート部３へ流れるが、この間に鋼帯１からの水分
を含んで雰囲気ガス中の水分量は徐々に増加する。最も
雰囲気ガス中の水分量が高くなる入側シュート部３の上
流（ｕＡ帯１の走行経路としての上流）部分より循環ポ
ンプ１１にて雰囲気ガスを吸引して取り出す。取り出し
た雰囲気ガスはフィルター１２を通過させて濾過してガ
ス中の油分等の汚れを除去し、次いでドライヤー１３に
て乾燥処理して水分を除去するのである。
このドライヤー１３としてはモレキュラーシーブス等を
使用するのが好ましく、更に自動切替にて再生、吸着が
繰り返されるタイプのものを採用するのが好ましい。こ
のドライヤー１３で乾燥処理した債の雰囲気ガス（再生
雰囲気ガスと言う口とがある）の露点は通常−６０℃以
下、水分量としては１０ＰＰＩＪ以下となっており、新
しい雰囲気ガスと何ら異なることなく使用することが出
来る。そこでシール部１０の気密構造を高め、焼鈍炉外
へ放出される雰囲気ガスの量を極力少なくするようにす
ると共に、上記の如くにして得られる再生雰囲気ガスを
コントロールバルブ１４．流量計１５にて流量調整して
、例えば新しい雰囲気ガスの送気口９の付近に設けた再
生雰囲気ガス用の送気口１６より焼鈍炉２内へ再送気す
るのである。この場合焼鈍炉２内の雰囲気ガスの水分量
を鋼帯］を酸化させない範囲に少なく維持するのに必要
な新しい雰囲気ガスと再生雰囲気ガスの合計量のうち多
くの部分に再生雰囲気ガスを使用して循環させる雰囲気
ガスの流量は常に一定とし、新しい雰囲気ガスの流量は
焼鈍炉２内圧力の保持に必要な分のみに止めることが望
ましい。
なお、図面による本発明方法の説明は竪型の連続焼鈍炉
を使用する連続焼鈍方法について行なったが、本発明方
法の範囲は雰囲気ガスを使用して行なうすべての連続焼
鈍方法を含むものである。
【発明の効果１
本発明方法によれば、新たに焼鈍炉２内へ送気する雰囲
気ガスは例えば炉内圧力を保持するのに必要なだけの流
量の如く、僅かで済む。従って、連続焼鈍に使用する新
しい雰囲気ガスの量は大幅に節減でき、かなりのコスト
ダウンを図ることが可能となる。また雰囲気ガスの循環
母を上げることにより、コストに殆んど影響なく焼鈍炉
２内の雰囲気ガスの水分出を従来よりも下げることが可
能となる口とから、一層品質を向上せしめて銅帯を連続
焼鈍することが出来るのである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous annealing method for steel strips, which can be carried out while reducing the amount of fresh atmospheric gas introduced into the furnace. [Prior art and problems] In general, the continuous annealing method for cold-rolled steel strips such as stainless steel is carried out on the upstream side of the uA band 10 travel path, as shown in FIG. From the entrance chute section 3. Top roll 4. The process is carried out as follows using a continuous annealing furnace (sometimes abbreviated as an annealing furnace) 2 in which a heating zone 5 and a cooling zone 6 are sequentially arranged. The steel strip 1 is run through an annealing furnace 2, and at the end of the entrance chute 3 (the direction of movement is reversed from upward to downward by a tube roll 4, then heated in a heating zone 5, and further cooled in a cooling zone 6). In this case, in order to prevent the steel strip 1 from oxidizing during heating and causing temper color, the annealing furnace 2 is filled with a reducing atmosphere gas such as a mixed gas of hydrogen and nitrogen, decomposed gas of ammonia, etc. However, during annealing, the amount of moisture in the atmospheric gas increases due to the moisture brought into the annealing furnace 2 by the steel strip 1, reducing the reducing ability of the atmospheric gas. For this reason, conventionally, a new atmosphere gas between the two sides is constantly fed into the annealing furnace 2, and the atmosphere gas corresponding to this new amount of air is fed into the annealing furnace 2 from the seal part 10 on the inlet or outlet side. This atmospheric gas was discharged to the outside.This atmospheric gas was supplied into the annealing furnace 2 by, for example, as shown in FIG. , and the air supply point is usually the lower part of the heating zone 5 or the upper part of the cooling zone 6, where the steel strip 1 is most easily oxidized. (Problems to be Solved by the Invention) As described above. Since it is necessary to keep the amount of moisture in the atmospheric gas in the annealing furnace within a range that does not oxidize the steel strip 1,
In the conventional continuous annealing method, a considerable amount of fresh atmospheric gas must be continuously supplied. However, the cost of this atmospheric gas is quite expensive and occupies a large portion of the continuous annealing cost. Therefore, in order to reduce costs, it is desirable to reduce the flow rate of the atmospheric gas as much as possible, but from the standpoint of quality, it is necessary to increase the flow rate to reduce the amount of moisture in the atmospheric gas in the annealing furnace. That is, the above-mentioned conventional continuous annealing method has the problem of an increase in cost or an unavoidable decrease in quality. [Means for Solving the Problems 1] In view of the problems of the prior art as described above, the present inventor reduced the amount of new atmospheric gas supplied and reduced the amount of moisture in the atmospheric gas in the Shigamo annealing furnace. As a result of our study, we aimed to provide a continuous annealing method that would both maintain and improve the quality of the copper strip by reducing the They discovered that if dirt and moisture are removed from the atmospheric gas, it can be reused as a new atmospheric gas, and the present invention was completed. That is, in the present invention, when continuous annealing is performed by running a steel strip without feeding new atmospheric gas into the furnace, a part of the atmospheric gas in the furnace is continuously taken out of the furnace and subjected to filtration and drying treatment. The present invention relates to a continuous annealing method for steel strip, which is characterized in that the amount of fresh atmosphere gas m supplied is reduced by carrying out circulation in which air is supplied into the furnace after the above-mentioned. [Description of structure 1] Hereinafter, the method of the present invention will be explained in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing the implementation state of the method of the present invention when a continuous annealing furnace is used. The new atmosphere gas is supplied into the annealing furnace 2 as usual, for example, through an air supply port 9 provided at the upper part of the cooling zone 6 as shown in FIG.
Do more. This atmospheric gas is mostly in the heating zone 5. The atmospheric gas flows into the inlet chute 3, but during this time, the atmospheric gas contains moisture from the steel strip 1, and the amount of moisture in the atmospheric gas gradually increases. The circulation pump 11 sucks and extracts the atmospheric gas from the upstream portion of the inlet chute 3 (upstream as the traveling path of the uA band 1) where the moisture content in the atmospheric gas is highest. The extracted atmospheric gas is filtered through a filter 12 to remove dirt such as oil in the gas, and then dried in a dryer 13 to remove moisture. As the dryer 13, it is preferable to use molecular sieves or the like, and it is further preferable to use a type in which regeneration and adsorption are repeated by automatic switching. The dew point of the bond atmosphere gas (sometimes referred to as regeneration atmosphere gas) that has been dried in this dryer 13 is usually -60°C or less, and the moisture content is 10 PPIJ or less, which is no different from the new atmosphere gas. It can be used. Therefore, the airtight structure of the seal portion 10 is improved to minimize the amount of atmospheric gas released outside the annealing furnace, and the regenerated atmospheric gas obtained as described above is transferred to the control valve 14. The flow rate is adjusted by a flow meter 15, and the air is re-supplied into the annealing furnace 2 through, for example, an air supply port 16 for regenerating atmospheric gas provided near the gas supply port 9 for new atmospheric gas. In this case, the regeneration atmosphere gas is used for a large portion of the total amount of new atmosphere gas and regeneration atmosphere gas required to maintain the moisture content of the atmosphere gas in the annealing furnace 2 within a range that does not oxidize the steel strip. It is desirable that the flow rate of the atmospheric gas to be circulated is always constant, and the flow rate of new atmospheric gas is limited to only the amount necessary to maintain the internal pressure of the annealing furnace 2. Although the method of the present invention has been explained with reference to the drawings in terms of a continuous annealing method using a vertical continuous annealing furnace, the scope of the method of the present invention includes all continuous annealing methods using atmospheric gas. Effect of the Invention 1 According to the method of the present invention, only a small amount of atmospheric gas is required to be newly fed into the annealing furnace 2, such as a flow rate necessary to maintain the pressure inside the furnace. Therefore, the amount of new atmospheric gas used for continuous annealing can be significantly reduced, making it possible to achieve considerable cost reductions. In addition, by increasing the circulation of the atmospheric gas, it is possible to lower the amount of moisture extracted from the atmospheric gas inside the annealing furnace 2 than before, with almost no effect on cost, which further improves the quality of copper strips. can be annealed continuously.
第１図は連続焼鈍炉を使用する場合の本発明方法の実施
状態を示す説明図。第２図は従来の連続焼鈍の実施状態
を示す説明図である。
１：金属鋼帯 ２；連続焼鈍炉３；入側シュ
ート部 ４ニドツブロール５；加熱ゾーン
６；冷却ゾーン７；コントロールパルプ ８；流量計
９：送気口 １０：シール部１１；循環ポ
ンプ １２；フィルター１３：ドライヤー
１４；コントロールバルブ１５；流量計
１６；送気口第１０FIG. 1 is an explanatory diagram showing the implementation state of the method of the present invention when a continuous annealing furnace is used. FIG. 2 is an explanatory diagram showing the implementation state of conventional continuous annealing. 1: Metallic steel strip 2; Continuous annealing furnace 3; Inlet chute 4 Nidotsu roll 5; Heating zone
6; Cooling zone 7; Control pulp 8; Flow meter 9: Air supply port 10: Seal portion 11; Circulation pump 12; Filter 13: Dryer
14; Control valve 15; Flow meter
16; Air supply port No. 10
Claims (1)
せしめて連続焼鈍を行なうに際し、炉内の雰囲気ガスの
一部を連続的に炉外に取り出して濾過及び乾燥処理を施
してから炉内に送気する循環を行なうことにより、新し
い雰囲気ガスの送気量を少なくすることを特徴とする鋼
帯の連続焼鈍方法。 ２ 炉内の鋼帯走行経路が上流側から入側シュート部、
加熱ゾーン及び冷却ゾーンから成つていて、新しい雰囲
気ガスを冷却ゾーン入口付近に送気し、炉内の雰囲気ガ
スを入側シュート部から取り出し、濾過及び乾燥処理後
に冷却ゾーン入口付近に送気して循環せしめる特許請求
の範囲第１項に記載の鋼帯の連続焼鈍方法。[Claims] 1. When continuous annealing is performed by running a steel strip while supplying new atmospheric gas into the furnace, a part of the atmospheric gas inside the furnace is continuously taken out of the furnace for filtration and drying. A continuous annealing method for steel strip characterized by reducing the amount of fresh atmospheric gas supplied by circulating the air into the furnace after treatment. 2 The steel strip running path in the furnace is from the upstream side to the inlet chute section,
Consisting of a heating zone and a cooling zone, new atmospheric gas is sent to the vicinity of the cooling zone entrance, the atmospheric gas inside the furnace is taken out from the inlet chute, and after filtration and drying processing, it is sent to the vicinity of the cooling zone entrance. 2. A continuous annealing method for a steel strip according to claim 1, wherein the steel strip is circulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1776486A JPS62177126A (en) | 1986-01-31 | 1986-01-31 | Method for continuously annealing strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1776486A JPS62177126A (en) | 1986-01-31 | 1986-01-31 | Method for continuously annealing strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62177126A true JPS62177126A (en) | 1987-08-04 |
Family
ID=11952772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1776486A Pending JPS62177126A (en) | 1986-01-31 | 1986-01-31 | Method for continuously annealing strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62177126A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347923A (en) * | 1989-04-05 | 1991-02-28 | Nippon Yakin Kogyo Co Ltd | Bright annealing furnace |
| JPH03140614A (en) * | 1989-10-23 | 1991-06-14 | Hamilton Stevens Group Inc | Bearing block |
| JPH0413817A (en) * | 1990-05-07 | 1992-01-17 | Nippon Yakin Kogyo Co Ltd | Bright annealing furnace |
| JPH0472021A (en) * | 1990-07-12 | 1992-03-06 | Nippon Steel Corp | Continuous bright annealing method for stainless steel strip |
| JPH04116127A (en) * | 1990-09-04 | 1992-04-16 | Nippon Yakin Kogyo Co Ltd | Bright annealing furnace |
| GB2270327A (en) * | 1992-08-06 | 1994-03-09 | Linde Ag | A process and appartatus for the continuous annealing of metallic material in the presence of hydrogen-rich protective gas |
| JP2002266035A (en) * | 2001-03-09 | 2002-09-18 | Chugai Ro Co Ltd | Vertical continuous heat treating apparatus |
| EP1338659A1 (en) * | 2002-02-22 | 2003-08-27 | Chugai Ro Co., Ltd. | White powder removing device for continuous annealing furnace |
| AT502238B1 (en) * | 2005-05-12 | 2007-12-15 | Ebner Ind Ofenbau | PROCESS FOR BATCH HEAT TREATMENT OF REFRIGERATED PRODUCTS |
| JP2011144433A (en) * | 2010-01-15 | 2011-07-28 | Nippon Metal Ind Co Ltd | Continuous annealing furnace |
| WO2015180501A1 (en) * | 2014-05-30 | 2015-12-03 | 宝山钢铁股份有限公司 | Reducing gas circulation recycling system for pickling-free continuous annealing furnace and utilisation method therefor |
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|---|---|---|---|---|
| JPS51100917A (en) * | 1975-03-03 | 1976-09-06 | Kobe Steel Ltd | Funikigasunosaisei saishonyoru reienkohanno shodonhoho |
| JPS5537571A (en) * | 1978-09-09 | 1980-03-15 | Masayuki Mitsui | Permanent automatic system by buoyancy |
| JPS564825A (en) * | 1979-06-26 | 1981-01-19 | Toshiba Corp | Pulse input unit |
| JPS58167721A (en) * | 1982-03-29 | 1983-10-04 | Nippon Steel Corp | Method of regenerating and using atmosphere gas from heat-treating oven |
| JPS6017805A (en) * | 1983-03-18 | 1985-01-29 | トムソン−キユイブル | Multiwire conductor with connection easiness and direct soldering type |
-
1986
- 1986-01-31 JP JP1776486A patent/JPS62177126A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51100917A (en) * | 1975-03-03 | 1976-09-06 | Kobe Steel Ltd | Funikigasunosaisei saishonyoru reienkohanno shodonhoho |
| JPS5537571A (en) * | 1978-09-09 | 1980-03-15 | Masayuki Mitsui | Permanent automatic system by buoyancy |
| JPS564825A (en) * | 1979-06-26 | 1981-01-19 | Toshiba Corp | Pulse input unit |
| JPS58167721A (en) * | 1982-03-29 | 1983-10-04 | Nippon Steel Corp | Method of regenerating and using atmosphere gas from heat-treating oven |
| JPS6017805A (en) * | 1983-03-18 | 1985-01-29 | トムソン−キユイブル | Multiwire conductor with connection easiness and direct soldering type |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347923A (en) * | 1989-04-05 | 1991-02-28 | Nippon Yakin Kogyo Co Ltd | Bright annealing furnace |
| JPH03140614A (en) * | 1989-10-23 | 1991-06-14 | Hamilton Stevens Group Inc | Bearing block |
| JPH0413817A (en) * | 1990-05-07 | 1992-01-17 | Nippon Yakin Kogyo Co Ltd | Bright annealing furnace |
| JPH0472021A (en) * | 1990-07-12 | 1992-03-06 | Nippon Steel Corp | Continuous bright annealing method for stainless steel strip |
| JPH04116127A (en) * | 1990-09-04 | 1992-04-16 | Nippon Yakin Kogyo Co Ltd | Bright annealing furnace |
| GB2270327B (en) * | 1992-08-06 | 1995-06-14 | Linde Ag | A process and apparatus for the continuous annealing of metallic material in the presence of hydrogen-rich protective gas |
| GB2270327A (en) * | 1992-08-06 | 1994-03-09 | Linde Ag | A process and appartatus for the continuous annealing of metallic material in the presence of hydrogen-rich protective gas |
| JP2002266035A (en) * | 2001-03-09 | 2002-09-18 | Chugai Ro Co Ltd | Vertical continuous heat treating apparatus |
| JP4567221B2 (en) * | 2001-03-09 | 2010-10-20 | 中外炉工業株式会社 | Vertical continuous heat treatment equipment |
| EP1338659A1 (en) * | 2002-02-22 | 2003-08-27 | Chugai Ro Co., Ltd. | White powder removing device for continuous annealing furnace |
| AT502238B1 (en) * | 2005-05-12 | 2007-12-15 | Ebner Ind Ofenbau | PROCESS FOR BATCH HEAT TREATMENT OF REFRIGERATED PRODUCTS |
| US7875235B2 (en) | 2005-05-12 | 2011-01-25 | Ebner Industrieofenbau Gesellschaft M.B.H. | Method for batchwise heat treatment of goods to be annealed |
| JP2011144433A (en) * | 2010-01-15 | 2011-07-28 | Nippon Metal Ind Co Ltd | Continuous annealing furnace |
| WO2015180501A1 (en) * | 2014-05-30 | 2015-12-03 | 宝山钢铁股份有限公司 | Reducing gas circulation recycling system for pickling-free continuous annealing furnace and utilisation method therefor |
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