JPS6358667B2 - - Google Patents
Info
- Publication number
- JPS6358667B2 JPS6358667B2 JP66385A JP66385A JPS6358667B2 JP S6358667 B2 JPS6358667 B2 JP S6358667B2 JP 66385 A JP66385 A JP 66385A JP 66385 A JP66385 A JP 66385A JP S6358667 B2 JPS6358667 B2 JP S6358667B2
- Authority
- JP
- Japan
- Prior art keywords
- tundish
- cooling
- water
- refractory
- lining
- 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 28
- 238000001816 cooling Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 239000011819 refractory material Substances 0.000 claims 2
- 239000000463 material Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 239000003595 mist Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000007704 transition Effects 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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- 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
- B22D11/10—Supplying or treating molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
「産業上の利用分野」
本発明は連続鋳造法において使用されたタンデ
イツシユの内張り耐火物の冷却方法に関するもの
である。
「従来の技術」
従来、タンデイツシユの整備に先立つ冷却は、
例えば鉄鋼便覧（昭和54年10月15日丸善発行第
巻798頁左欄下から17行に記載があるように多量
の水による急冷処理が行なわれていた。
「発明が解決しようとする問題点」
従来の方法は水をかけて耐火物表面を急冷する
のでコーテイング材のはつり除去後の母材の冷却
状態は不均一となり、このために母材に層状剥離
が生じてタンデイツシユは短寿命となると共に多
量の水蒸気を発生して作業環境上に問題があつ
た。
「問題点を解決するための手段」
本発明は高温物の噴霧冷却を行う場合、第４
図、第５図から望ましい範囲を得る適当な水量と
粒径と搬送気体量とを選定すれば微細な霧滴が核
沸騰し、この核沸騰により高温物に当る前に蒸発
する現象に着目したものであつて、上記問題点を
解決するために次のように構成されている。即ち
連続鋳造法で使用されたタンデイツシユの整備工
程において、タンデイツシユの内張り耐火物を冷
却する際、霧滴径20〜300μｍの微小な水滴群の
水量0.5〜3.5／分をタンデイツシユ内部への
100〜1000m3／分の気流に添加してタンデイツシ
ユ内張り耐火物表面を冷却することを特徴とする
タンデイツシユ内張り耐火物の噴霧散水冷却方法
にある。
「作用」
連続鋳造に使用される溶鋼を受けるタンデイツ
シユは使用後内面の手入れを行なうが使用直後は
高温（300〜400℃）である。従つてタンデイツシ
ユ内部に本発明者等の知見にもとずく上述の量の
気流を送風し、同気流内に上述の微小水滴群を添
加すると同タンデイツシユの内張り耐火物表面の
温度は時間の経過に伴つて均等かつ円滑に下降す
る。これは上記微小水滴がそれぞれ核沸騰し、上
記表面に当る前に蒸発し、この蒸発時にタンデイ
ツシユ内張りの熱を均等に吸収しこれを送風によ
つて持ち去る現象によるものであつて上記表面温
度の円滑な下降は迅速かつ全面的に行なわれる。
「実施例」
連続鋳造法で使用されたタンデイツシユ１（内
張り耐火物表面温度300〜400℃）の開口部中央部
に軸流扇風機２を装着した機枠３を架設し、これ
を回転させることによつて第２図矢印方向の送風
を行いその送風量は100〜1000m3／分である。こ
の状態において第１図仮想線位置にある送水管
４，４を同図実線位置に回動し送水してその先端
の噴霧ノズル５（フオグジエツトノズル）から霧
滴径20〜300μｍの水滴群0.5〜3.5／分（第４
図）を噴出すると同水滴群は第２図矢印方向の送
風に伴つて移行し加熱されて微細水滴は核沸騰
し、内張り耐火物６の表面６′に当る前に蒸発し
一定時間冷却時の耐火物内部温度勾配t2（第７図）
に沿つて同表面は冷却する。即ち噴霧冷却の場合
（t2の場合）は風冷の場合（t1の場合）や水冷の
場合（t3の場合）と異り、霧滴を微小化すること
によつて耐火物表面６′を濡らさないために同表
面６′に不均一な急冷部を発生させず、送風に乗
せて蒸気を除去するため作業環境における蒸気対
流がなく、連続噴霧が可能となり冷却時間が短縮
され注水急冷に近い抜熱能力を示す。第８図は本
発明の噴霧冷却（上記t2の場合）の比較例の一例
で耐火物表面６′は徐冷され、水冷の場合（第１
０図の場合）のような急冷・急熱は発生しない。
但し霧滴径・流量が本発明が限定する範囲外であ
るため耐火物表面６′を濡らさないように噴霧を
断続的に行つたものである。第３図は本発明の噴
霧冷却（t2の場合）の最適な例で霧滴径、流量、
ノズル位置が本発明が定める範囲内で実施され、
連続噴霧によつて徐冷され300〜100℃冷却時間は
180分であつて第９図に示す風冷のみの場合の260
〜90℃冷却時間の240分と比較してきわめて短時
間に徐冷されることがわかる。第７図中７で示す
ものは水滴、第６図中８は鉄皮である。
この実施例の場合霧滴径20〜300μｍ、流量は
0.1〜3.5／分であることは上述のとおりであ
り、ノズル５の位置はＬ＝1000〜3000mm、Ｈ＝０
〜800mmであつた（第２図）。第１図、第２図にノ
ズル位置設定の状態を示しタンデイツシユ１内部
は軸流扇風機２により風冷されているためノズル
５を同扇風機２に近づけると霧滴はタンデイツシ
ユ１の中央部で冷却に供され炉材全体を一様に冷
却することはできない。又ノズル５を扇風機２か
ら離し過ぎると霧滴の一部はタンデイツシユ１か
ら外へ向う風のためタンデイツシユ１内に入らず
有効な冷却ができない。よつてタンデイツシユ１
の内張り耐火物を噴霧により均等に冷却するため
には扇風機２のつくる空気流に適したノズル位置
Ｌ，Ｈを設定することが望ましい。
上記実施例の結果を従来例と併記して第１表に
示す。
"Industrial Field of Application" The present invention relates to a method for cooling the refractory lining of a tundish used in a continuous casting method. ``Conventional technology'' Conventionally, cooling prior to maintenance of the tandy
For example, as described in the Iron and Steel Handbook (October 15, 1976, published by Maruzen, page 798, line 17 from the bottom of the left column), rapid cooling treatment was carried out using a large amount of water. ” In the conventional method, the surface of the refractory is rapidly cooled by spraying water, so the cooling condition of the base material after the coating material is chipped away becomes uneven, which causes delamination of the base material and shortens the service life of the tandate. In addition, a large amount of water vapor was generated, which caused a problem in the working environment.
We focused on the phenomenon that fine mist droplets undergo nucleate boiling by selecting the appropriate amount of water, particle size, and amount of carrier gas to obtain the desired range from Fig. In order to solve the above problems, it is constructed as follows. That is, in the maintenance process of a tundish used in the continuous casting method, when cooling the refractory lining of the tundish, a group of minute water droplets with a diameter of 20 to 300 μm is poured into the tundish at a rate of 0.5 to 3.5 per minute.
A method for cooling a tundish lining refractory by spraying water, which is characterized in that the surface of the tundish lining refractory is cooled by adding water to an air flow of 100 to 1000 m 3 /min. ``Operation'' The inner surface of the tandate that receives molten steel used in continuous casting is cleaned after use, but the temperature is high (300 to 400°C) immediately after use. Therefore, by blowing the above-mentioned amount of airflow into the tundish based on the knowledge of the present inventors and adding the above-mentioned microscopic water droplets into the airflow, the temperature of the surface of the refractory lining of the tundish will change over time. As a result, it descends evenly and smoothly. This is due to the phenomenon that each of the minute water droplets undergo nucleate boiling and evaporate before hitting the surface, and at the time of this evaporation, the heat of the tundish lining is evenly absorbed and carried away by air, and the surface temperature is maintained smoothly. The descent is rapid and complete. ``Example'' A machine frame 3 equipped with an axial fan 2 was installed in the center of the opening of a tundish 1 (lined refractory surface temperature: 300 to 400°C) used in the continuous casting method, and this was rotated. Therefore, air is blown in the direction of the arrow in FIG. 2, and the amount of air blown is 100 to 1000 m 3 /min. In this state, the water pipes 4, 4 located at the imaginary line position in Fig. 1 are rotated to the solid line position in the figure, and water is fed from the spray nozzle 5 (fog jet nozzle) at the tip of the water pipes 4, 4, to form a group of water droplets with a diameter of 20 to 300 μm. 0.5-3.5/min (4th
When the water droplets are ejected, the water droplets move as the air blows in the direction of the arrow in Fig. 2, are heated, and the fine water droplets undergo nucleate boiling, evaporate before hitting the surface 6' of the lining refractory 6, and are cooled for a certain period of time. Refractory internal temperature gradient t 2 (Figure 7)
The same surface cools along. In other words, in the case of spray cooling (in the case of t 2 ), unlike in the case of air cooling (in the case of t 1 ) or the case of water cooling (in the case of t 3 ), the refractory surface 6 is Since the surface 6' does not get wet, uneven quenching does not occur on the same surface 6', and since the steam is removed by blowing air, there is no steam convection in the working environment, and continuous spraying is possible, reducing cooling time and rapid water injection cooling. Shows a heat removal capacity close to that of FIG. 8 is an example of a comparative example of spray cooling of the present invention (in the case of t 2 above), in which the refractory surface 6' is gradually cooled, and in the case of water cooling (in the case of t 2), the refractory surface 6' is gradually cooled.
No rapid cooling or rapid heating occurs as in case of Figure 0).
However, since the diameter and flow rate of the mist droplets were outside the range defined by the present invention, the spraying was carried out intermittently so as not to wet the refractory surface 6'. Figure 3 shows an optimal example of spray cooling (for t 2 ) according to the present invention, with the droplet diameter, flow rate,
The nozzle position is carried out within the range defined by the present invention,
It is slowly cooled by continuous spraying and the cooling time is 300~100℃.
260 for 180 minutes and only wind cooling as shown in Figure 9
It can be seen that the slow cooling time is extremely short compared to the 240 minutes of cooling time to ~90°C. 7 in FIG. 7 is a water droplet, and 8 in FIG. 6 is an iron shell. In this example, the mist droplet diameter is 20 to 300 μm, and the flow rate is
As mentioned above, the speed is 0.1~3.5/min, and the position of the nozzle 5 is L=1000~3000mm, H=0
It was ~800mm (Figure 2). Figures 1 and 2 show the state of the nozzle position settings. The inside of the tundish 1 is cooled by the axial fan 2, so when the nozzle 5 is brought close to the fan 2, the mist droplets are cooled in the center of the tundish 1. It is not possible to uniformly cool the entire furnace material. Furthermore, if the nozzle 5 is placed too far away from the electric fan 2, some of the mist droplets will not enter the tundish 1 due to the wind blowing outward from the tundish 1, making it impossible to cool them effectively. Yotsute tandaisuyu 1
In order to uniformly cool the refractory lining by spraying, it is desirable to set nozzle positions L and H suitable for the air flow generated by the electric fan 2. The results of the above embodiment are shown in Table 1 together with the conventional example.
【表】
「効果」
本発明は水量と粒径と搬送気体量を限定したの
でタンデイツシユの整備に先立つ内面冷却に際
し、少ない冷却用水量でタンデイツシユ内張り表
面を濡らすことなく冷却することを可能とし、こ
れによつてタンデイツシユ内張りを均等かつ効率
よく冷却し得て母材の層状剥離を防止し耐用命数
を格段に向上すると共に排気機能も発生水蒸気量
が少いことから小形化でき、しかも作業環境を大
巾に改善することができる等産業上もたらす効果
は大きい。[Table] "Effects" Since the present invention limits the amount of water, particle size, and amount of carrier gas, when cooling the inner surface of the tundish dish prior to maintenance, it is possible to cool the tundish lining surface with a small amount of cooling water without wetting it. This makes it possible to evenly and efficiently cool the tundish lining, prevent delamination of the base material, and significantly improve the service life.The exhaust function can also be made smaller because it generates less water vapor, and the work environment is improved. It has great industrial effects, such as the ability to make wide-ranging improvements.
第１図は本発明のタンデイツシユ内張り耐火物
の噴霧散水冷却方法の実施状態を示す斜視図、第
２図は上記方法の説明図であつて第１図Ａ−Ａ線
による縦断面図、第３図は本発明方法による炉材
表面温度推移図、第４図は霧滴径・水量による濡
れ曲線図、第５図は霧滴径・冷却時間曲線図、第
６図はタンデイツシユの縦断面図、第７図は耐火
物内部温度勾配図、第８図は本発明の比較例によ
る炉材表面温度推移図、第９図は風冷の場合の炉
材表面温度推移図、第１０図は多量の水をかける
場合の炉材表面温度推移図である。
１……タンデイツシユ、６……内張り耐火物。
FIG. 1 is a perspective view showing the implementation state of the method for cooling a tundish lining refractory by spraying water according to the present invention, FIG. Figure 4 is a graph of the temperature change on the surface of the furnace material according to the method of the present invention, Figure 4 is a wetting curve diagram based on the diameter of droplets and water amount, Figure 5 is a diagram of the diameter of droplets and cooling time curve, Figure 6 is a longitudinal cross-sectional view of the tundish, Fig. 7 is a diagram of the temperature gradient inside the refractory, Fig. 8 is a diagram of the temperature change on the surface of the furnace material according to a comparative example of the present invention, Fig. 9 is a diagram of the temperature change on the surface of the furnace material in the case of wind cooling, and Fig. 10 is a diagram of the temperature change on the surface of the furnace material in the case of wind cooling. FIG. 3 is a diagram of the temperature transition on the surface of the furnace material when water is poured on the furnace material. 1... Tanditetsu, 6... Lining refractory.
Claims (1)
備工程において、タンデイツシユの内張り耐火物
を冷却する際、霧滴径20〜300μｍの微小な水滴
群の水量0.5〜3.5／分をタンデイツシユ内部へ
の100〜1000m3／分の気流に添加してタンデイツ
シユ内張り耐火物表面を冷却することを特徴とす
るタンデイツシユ内張り耐火物の噴霧散水冷却方
法。1. In the maintenance process of a tundish used in the continuous casting method, when cooling the refractory lining of the tundish, a group of minute water droplets with a diameter of 20 to 300 μm is poured at a rate of 0.5 to 3.5/min into the tundish for 100 to 1000 m. 1. A method for cooling a tundish lining refractory material by spraying water, the method comprising: cooling the surface of the tundish lining refractory material by adding water to a 3 /min air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP66385A JPS61159251A (en) | 1985-01-07 | 1985-01-07 | Water spray cooling method of lining refractories of tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP66385A JPS61159251A (en) | 1985-01-07 | 1985-01-07 | Water spray cooling method of lining refractories of tundish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61159251A JPS61159251A (en) | 1986-07-18 |
| JPS6358667B2 true JPS6358667B2 (en) | 1988-11-16 |
Family
ID=11479964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP66385A Granted JPS61159251A (en) | 1985-01-07 | 1985-01-07 | Water spray cooling method of lining refractories of tundish |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61159251A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2699440B1 (en) * | 1992-12-21 | 1995-03-17 | Lorraine Laminage | Method and device for cooling the walls of a metallurgical container brought to high temperature. |
| JP4712513B2 (en) * | 2005-10-19 | 2011-06-29 | 新日本製鐵株式会社 | Tundish maintenance equipment |
| KR100706590B1 (en) * | 2006-06-02 | 2007-04-13 | 제이에프이 스틸 가부시키가이샤 | Method for cooling refractory material of refractory structure and spray nozzle for cooling refractory material of refractory structure |
-
1985
- 1985-01-07 JP JP66385A patent/JPS61159251A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61159251A (en) | 1986-07-18 |
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