JPS6258813B2 - - Google Patents
Info
- Publication number
- JPS6258813B2 JPS6258813B2 JP57098952A JP9895282A JPS6258813B2 JP S6258813 B2 JPS6258813 B2 JP S6258813B2 JP 57098952 A JP57098952 A JP 57098952A JP 9895282 A JP9895282 A JP 9895282A JP S6258813 B2 JPS6258813 B2 JP S6258813B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- water
- rolls
- slab
- refrigerant
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000003507 refrigerant Substances 0.000 claims description 20
- 238000011144 upstream manufacturing Methods 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
この発明は、連続鋳造機の顕熱回収装置に関す
るものである。
連続鋳造機においては、周知のように、溶鋼を
無底鋳型に鋳込み、この鋳型内で溶鋼の周囲に薄
い凝固殻を形成した後、鋳型直下の水スプレー帯
域において凝固殻表面に冷却水を噴射し、引き続
き空冷により凝固殻を成長させつつピンチロール
によつて引き抜いて鋳片を製造する。鋳型とピン
チロールの間では、鋳片内部が固まつていないた
め、凝固殻が破れないようにロールで鋳片を案内
支持しなければならない。鋳込む鋳片の幅が広い
ほど、殻に溶鋼圧が働くため殻に発生する応力お
よび歪値が大きくなる。鋳片の品質上この応力と
歪はある値以上に抑えなければならない。したが
つて、幅の広い鋳片になる程、ロール間隔を狭く
せねばならない。かつ、鋳型に近い程、ロール間
隔を密にせねばならない。
このような連続鋳造においては、鋳片が固まる
まで、その凝固熱を外部へ放熱しており、この放
射熱を回収することは、省エネルギーとして製鋼
コストを下げる上で重要である。ところで、熱回
収用の管をロール間に設置しようとしてもロール
が密に配列されているため、前記管で鋳片を覆う
ことが難しくかつ鋳片の放散する熱のかなりの量
がロールに吸収されてしまう。このため、従来に
おいては、ローラエプロンおよびピンチロール間
では、熱回収されることなく放置されていた。
この発明は、このような事情に鑑みて提案され
たもので、その目的は、ローラエプロン部および
ピンチロール部で放射熱を回収するとともに、緩
冷却を行なうことのできる顕熱回収装置を提供す
ることにある。
この発明に係る顕熱回収装置は、ローラエプロ
ンのロールとピンチロールの内部に冷媒通過路を
設け、これらロール群を複数段に区分けしてそれ
ぞれに気水分離ドラム、循環ポンプを有する冷媒
循環管路を接続するとともに、冷媒循環管路の各
気水分離ドラムを、給水ポンプを有する接続管路
により接続し、下流側のロール群から順に上流側
のロール群へと冷媒を通すように構成し、下流側
の冷媒循環系においてまず低圧の熱水とした後、
上流側に冷媒循環系で高温・高圧の蒸気を得るよ
うにしたものである。
以下、この発明を図示する一実施例に基づいて
説明する。第1図に示すように、鋳型Mとピンチ
ロール1との間には、多数のローラエプロン2が
湾曲して配置されており、これらローラエプロン
2は、それぞれ複数のガイドロール3を有し、鋳
片Sを案内支持する。
ピンチロール1および各ガイドロール3は、内
部に一端から他端へと貫通する冷媒通過路4が穿
設され(第2図参照)、この冷媒通過路4に連通
するヘツダ5が、各ローラエプロンごとに、また
ピンチロール1に接続されている。
このような構成のピンチロール1およびローラ
エプロン2において、これらロール群を下流側ロ
ール群6と上流側ロール群7の二段に区別けし、
これらロール群6,7にそれぞれ気水分離ドラム
13および循環ポンプ14を有する下流側冷媒循
環管路8、気水分離ドラム16および循環ポンプ
17を有する上流側冷媒循環管路9が接続され、
これら気水分離ドラム13,16が給水ポンプ1
2を有する接続管路10により接続される。
下流側冷媒循環管路8においては、給水タンク
11から給水ポンプ12により純水を下流側気水
分離ドラム13へ供給し、下流側循環ポンプ14
によりこの純水を下流側ロール群6のロール1あ
るいは3とドラム13との間を循環させ、純水は
ロール1あるいは3の冷媒通過路4を通過中鋳片
の放射熱を熱伝導により吸収して低圧の熱水とな
る。
ドラム13中の低圧の熱水は、接続管路10を
通つて給水ポンプ15により上流側冷媒循環管路
9の上流側気水分離ドラム16に供給される。こ
のドラム16中の熱水は、上流側循環ポンプ17
により上流側ロール群7のロール3に送られ、こ
こでさらに高温にさせ、ドラム16に戻し高圧の
蒸気Stを回収する。
ヘツダ5への給排水は並列とされているが、こ
れに限らず隣接するヘツダを接続して直列として
もよい。さらに、ロール1あるいは3への給水も
並列でも直列の配管でもよい。
本発明においては、下流側ロール群6において
まず低圧の熱水とした後、上流側ロール群7へ供
給するため、この上流側ロール群7においては通
常の雰囲気温度から昇温する必要がなくなるた
め、高温・高圧の蒸気を得ることができる。
さらに、本発明のもう一つの利点は、鋳片を緩
冷却(ソフトクリーリング)することができると
いう点にある。最近、省エネルギーの目的で連続
鋳造ラインを分塊圧延ラインへ直結して鋳片を高
温で出片することが行われているが、従来設備の
ロールでは、ロール保護のためロール内部へ冷却
水を通しているので、ロール表面の平均温度は
200〜300℃と低く保たれており、鋳片はロールに
よりかなりの熱が抜熱されることになる。したが
つて、ロールとの接触部で鋳片が急冷されるた
め、鋼種によつては表面割れが発生する。
本発明においては、ロール1,3内部に熱水が
循環されることにより、必然的に熱水の温度分ロ
ールの表面温度が高くなり、従来より鋳片よりの
抜熱量が少なくなるとともに冷却度も少なくな
る。これにより鋳片は緩冷却され表面割れが防止
されることになる。
次に、具体的数値例をあげて説明する。これは
次のような条件で連続鋳造を行つた例であり、
The present invention relates to a sensible heat recovery device for a continuous casting machine. As is well known, in continuous casting machines, molten steel is poured into a bottomless mold, a thin solidified shell is formed around the molten steel within this mold, and then cooling water is injected onto the surface of the solidified shell in a water spray zone directly below the mold. Then, the solidified shell is grown by air cooling and pulled out by pinch rolls to produce a slab. Since the inside of the slab is not solidified between the mold and the pinch rolls, the slab must be guided and supported by the rolls to prevent the solidified shell from breaking. The wider the slab to be cast, the greater the stress and strain values generated in the shell due to the molten steel pressure acting on the shell. For the quality of slabs, this stress and strain must be suppressed above a certain value. Therefore, the wider the slab, the narrower the roll spacing must be. In addition, the closer the roll is to the mold, the closer the roll spacing must be. In such continuous casting, solidification heat is radiated to the outside until the slab hardens, and recovering this radiant heat is important for saving energy and lowering steel manufacturing costs. By the way, even if you try to install heat recovery tubes between the rolls, the rolls are arranged closely, so it is difficult to cover the slab with the tube, and a considerable amount of the heat dissipated by the slab is absorbed by the rolls. It will be done. For this reason, in the past, heat was left unrecovered between the roller apron and the pinch rolls. This invention was proposed in view of the above circumstances, and its purpose is to provide a sensible heat recovery device capable of recovering radiant heat at the roller apron section and the pinch roll section and performing slow cooling. There is a particular thing. The sensible heat recovery device according to the present invention provides a refrigerant passage inside the rolls of the roller apron and the pinch rolls, and divides these roll groups into a plurality of stages, each of which has a refrigerant circulation pipe having a steam/water separation drum and a circulation pump. At the same time, each air-water separation drum of the refrigerant circulation pipe is connected by a connecting pipe having a water supply pump, and the refrigerant is configured to pass from the roll group on the downstream side to the roll group on the upstream side in order. In the downstream refrigerant circulation system, the water is first converted to low-pressure hot water, and then
High-temperature, high-pressure steam is obtained through a refrigerant circulation system on the upstream side. The present invention will be described below based on an illustrated embodiment. As shown in FIG. 1, a large number of roller aprons 2 are arranged in a curved manner between the mold M and the pinch roll 1, and each of these roller aprons 2 has a plurality of guide rolls 3. Guides and supports the slab S. The pinch roll 1 and each guide roll 3 are provided with a refrigerant passage 4 that penetrates from one end to the other end (see Fig. 2), and a header 5 that communicates with this refrigerant passage 4 is connected to each roller apron. Each is also connected to the pinch roll 1. In the pinch roll 1 and roller apron 2 having such a configuration, these roll groups are divided into two stages, a downstream roll group 6 and an upstream roll group 7,
A downstream refrigerant circulation line 8 having a steam/water separation drum 13 and a circulation pump 14 and an upstream refrigerant circulation line 9 having a steam/water separation drum 16 and a circulation pump 17 are connected to these roll groups 6 and 7, respectively.
These air-water separation drums 13 and 16 are connected to the water supply pump 1.
They are connected by a connecting conduit 10 having 2. In the downstream refrigerant circulation pipe 8, pure water is supplied from the water tank 11 to the downstream steam/water separation drum 13 by the water pump 12, and the downstream circulation pump 14
The pure water is circulated between the rolls 1 or 3 of the downstream roll group 6 and the drum 13, and the pure water absorbs the radiant heat of the slab by thermal conduction while passing through the coolant passage 4 of the rolls 1 or 3. and becomes low-pressure hot water. The low-pressure hot water in the drum 13 is supplied to the upstream steam/water separation drum 16 of the upstream refrigerant circulation pipe 9 through the connecting pipe 10 by the water supply pump 15 . The hot water in this drum 16 is transferred to an upstream circulation pump 17
The steam is then sent to the roll 3 of the upstream roll group 7, where it is further heated to a high temperature, and then returned to the drum 16 to recover the high pressure steam St. Although the water supply and drainage to the headers 5 are arranged in parallel, the present invention is not limited to this, and adjacent headers may be connected in series. Furthermore, the water supply to the rolls 1 or 3 may be provided by parallel or series piping. In the present invention, since the downstream roll group 6 first generates low-pressure hot water and then supplies it to the upstream roll group 7, there is no need to raise the temperature from the normal ambient temperature in the upstream roll group 7. , high temperature and high pressure steam can be obtained. Furthermore, another advantage of the present invention is that the slab can be cooled slowly (soft cooling). Recently, in order to save energy, a continuous casting line is directly connected to a blooming line and slabs are exposed at high temperature. However, in conventional equipment, cooling water is passed inside the roll to protect the roll. Therefore, the average temperature of the roll surface is
The temperature is kept low at 200-300℃, and a considerable amount of heat is removed from the slab by the rolls. Therefore, since the slab is rapidly cooled at the contact portion with the rolls, surface cracks may occur depending on the steel type. In the present invention, by circulating hot water inside the rolls 1 and 3, the surface temperature of the rolls is inevitably raised by the temperature of the hot water, and the amount of heat removed from the slab is lower than in the past, and the cooling degree is will also decrease. As a result, the slab is slowly cooled and surface cracks are prevented. Next, explanation will be given using specific numerical examples. This is an example of continuous casting under the following conditions.
【表】【table】
【表】
従来の工業用水を通してロールの冷却を行つた
場合、ロール内面温度は40〜60℃で、ロール表面
温度の平均温度は200〜300℃と低く保たれていた
が、本発明では、ロール内面温度が170〜250℃で
ロール表面温度の平均温度が250〜400℃となり、
従来よりも鋳片よりの抜熱量、冷却度が少なくな
り、緩冷却が可能となる。
なお、この実施例では、ロール群を二段に区分
けしてあるが、これに限らず三段以上の複数段と
してもよいが。また、下流側ロール群6の熱水温
度が100℃を大幅に越えないように制御する場合
には、給水ポンプ12および下流側気水分離ドラ
ム13は不要であり、第3図に示すように、給水
タンク11をドラム13の代わりに使用すること
ができる。
なお、鋳型Mの直下では鋳片の凝固殻が破れて
溶湯が殻外へ出るという事故が発生することがあ
る。この時には、操業を停止しローラエプロンの
修理を行わなければならない。そのため、鋳型M
直下の数個のローラエプロンのロール群を給水タ
ンク11へ供給する純水の予熱(100℃以下)に
利用するようにしてもよい。このようにすれば、
この系統は、ボイラ配管ではなく水配管でよく損
傷も少なく抑えることができる。
また、冷媒は純水に限らずフロン等を使用して
も同様の効果を得ることができる。
前述のとおり、この発明によれば、ロール群を
複数段に区分けして熱回収するため鋳片の放射熱
を効果的に回収することができる。さらに、鋳片
の緩冷却が可能であり、表面割れを防止すること
ができる。[Table] When the roll was conventionally cooled through industrial water, the roll inner surface temperature was kept at 40 to 60°C and the average roll surface temperature was kept low at 200 to 300°C, but in the present invention, the roll When the inner surface temperature is 170 to 250℃, the average roll surface temperature is 250 to 400℃,
Compared to the conventional method, the amount of heat removed from the slab and the degree of cooling are lower, allowing for gradual cooling. In this embodiment, the roll group is divided into two stages, but the roll group is not limited to this and may be divided into three or more stages. In addition, when controlling the hot water temperature of the downstream roll group 6 so as not to significantly exceed 100°C, the water supply pump 12 and the downstream air-water separation drum 13 are unnecessary, and as shown in FIG. , the water supply tank 11 can be used instead of the drum 13. It should be noted that an accident may occur in which the solidified shell of the slab ruptures directly under the mold M and the molten metal flows out of the shell. At this time, operations must be stopped and the roller apron repaired. Therefore, mold M
A group of several roller apron rolls directly below may be used for preheating (to 100° C. or less) pure water to be supplied to the water supply tank 11. If you do this,
This system uses water piping rather than boiler piping, and damage can be minimized. Further, the same effect can be obtained by using not only pure water but also fluorocarbon or the like as the refrigerant. As described above, according to the present invention, the roll group is divided into multiple stages for heat recovery, so that the radiant heat of the slab can be effectively recovered. Furthermore, the slab can be cooled slowly, and surface cracks can be prevented.
第1図は、この発明に係る顕熱回収装置を示す
縦断面図、第2図は同様の装置の系統図、第3図
は同様の装置の下流側ロール群の循環系統の異な
る系統図である。
1……ピンチロール、2……ローラエプロン、
3……ガイドロール、4……冷媒通過路、5……
ヘツダ、6……下流側ロール群、7……上流側ロ
ール群、8……下流側冷媒循環管路、9……上流
側冷媒循環管路、10……接続管路、11……給
水タンク、12……給水ポンプ、13……下流側
気水分離ドラム、14……下流側循環ポンプ、1
5……給水ポンプ、16……上流側気水分離ドラ
ム、17……上流側循環ポンプ。
FIG. 1 is a vertical sectional view showing a sensible heat recovery device according to the present invention, FIG. 2 is a system diagram of a similar device, and FIG. 3 is a system diagram of a different circulation system of a downstream roll group of the same device. be. 1...pinch roll, 2...roller apron,
3...Guide roll, 4...Refrigerant passage, 5...
Header, 6...Downstream roll group, 7...Upstream roll group, 8...Downstream refrigerant circulation pipe, 9...Upstream refrigerant circulation pipe, 10...Connection pipe, 11...Water tank , 12...Water pump, 13...Downstream side air-water separation drum, 14...Downstream circulation pump, 1
5... Water supply pump, 16... Upstream side air-water separation drum, 17... Upstream side circulation pump.
Claims (1)
部に冷媒通過路を設け、これらロール群を複数段
に区分けしてそれぞれに気水分離ドラム、循環ポ
ンプを有する冷媒循環管路を接続するとともに、
冷媒循環管路の各気水分離ドラムを、給水ポンプ
を有する接続管路により接続し、下流側のロール
群から順に上流側のロール群へと冷媒を通すよう
に構成したことを特徴とする連続鋳造機の顕熱回
収装置。1. A refrigerant passage is provided inside the rolls and pinch rolls of the roller apron, and these roll groups are divided into multiple stages, each of which is connected to a refrigerant circulation pipe having a steam separation drum and a circulation pump,
Each of the air-water separation drums of the refrigerant circulation pipe is connected by a connecting pipe having a water supply pump, and the refrigerant is sequentially passed from the roll group on the downstream side to the roll group on the upstream side. Sensible heat recovery device for casting machines.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9895282A JPS58215255A (en) | 1982-06-09 | 1982-06-09 | Device for recovering sensible heat in continuous casting machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9895282A JPS58215255A (en) | 1982-06-09 | 1982-06-09 | Device for recovering sensible heat in continuous casting machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58215255A JPS58215255A (en) | 1983-12-14 |
JPS6258813B2 true JPS6258813B2 (en) | 1987-12-08 |
Family
ID=14233425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9895282A Granted JPS58215255A (en) | 1982-06-09 | 1982-06-09 | Device for recovering sensible heat in continuous casting machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58215255A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2504454C2 (en) * | 2009-03-02 | 2014-01-20 | Смс Зимаг Аг | Power recovery at strip hot rolling mill by converting continuous casting plant cooling heat and residual heat of slabs or coil into electric power, or other application of process trapped heat |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100837760B1 (en) | 2006-09-29 | 2008-06-13 | 조소곤 | the compound cooling system through water and air in continuous casting apron |
DE102010036020A1 (en) | 2010-05-07 | 2011-11-10 | Sms Siemag Ag | Method and device for recovering energy behind a continuous casting plant |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51148619A (en) * | 1975-06-16 | 1976-12-21 | Kobe Steel Ltd | Method of suppling cooling water in continuous casting installation |
JPS54129551A (en) * | 1978-03-31 | 1979-10-08 | Nippon Steel Corp | Heat recovering cooler for high temperature material |
JPS56154214A (en) * | 1979-10-18 | 1981-11-28 | Voest Ag | Method of recovering sensible heat from slab casted according to continuous casting method and device for executing said method |
JPS5747561A (en) * | 1980-09-03 | 1982-03-18 | Sumitomo Metal Ind Ltd | Method for recovering heat of continuously cast ingot |
-
1982
- 1982-06-09 JP JP9895282A patent/JPS58215255A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51148619A (en) * | 1975-06-16 | 1976-12-21 | Kobe Steel Ltd | Method of suppling cooling water in continuous casting installation |
JPS54129551A (en) * | 1978-03-31 | 1979-10-08 | Nippon Steel Corp | Heat recovering cooler for high temperature material |
JPS56154214A (en) * | 1979-10-18 | 1981-11-28 | Voest Ag | Method of recovering sensible heat from slab casted according to continuous casting method and device for executing said method |
JPS5747561A (en) * | 1980-09-03 | 1982-03-18 | Sumitomo Metal Ind Ltd | Method for recovering heat of continuously cast ingot |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2504454C2 (en) * | 2009-03-02 | 2014-01-20 | Смс Зимаг Аг | Power recovery at strip hot rolling mill by converting continuous casting plant cooling heat and residual heat of slabs or coil into electric power, or other application of process trapped heat |
Also Published As
Publication number | Publication date |
---|---|
JPS58215255A (en) | 1983-12-14 |
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