JPS632702B2 - - Google Patents
Info
- Publication number
- JPS632702B2 JPS632702B2 JP54042569A JP4256979A JPS632702B2 JP S632702 B2 JPS632702 B2 JP S632702B2 JP 54042569 A JP54042569 A JP 54042569A JP 4256979 A JP4256979 A JP 4256979A JP S632702 B2 JPS632702 B2 JP S632702B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- mold
- tundish
- inclusions
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910000655 Killed steel Inorganic materials 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/112—Treating the molten metal by accelerated cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
本発明は金属の連続鋳造法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous metal casting method.
金属の連続鋳造法、例えば鋼の連続鋳造法は最
近急速に工業化されたが、従来の鋼塊法に比して
非金属介在物の浮上時間が短かく、非金属介在物
の含有量は従来の良好な鋼塊法に劣る場合が多か
つた。 Continuous casting methods for metals, such as continuous casting methods for steel, have recently been rapidly industrialized, but compared to the conventional steel ingot method, the floating time of nonmetallic inclusions is shorter, and the content of nonmetallic inclusions is lower than that of conventional methods. In many cases, it was inferior to the good steel ingot method.
従来の連続鋳造法において、非金属介在物を改
善する方法としては溶融金属を特殊処理する方
法、溶融金属の鋳型注入温度を高める方法、さら
には溶融金属の酸化を防止する方法が実施されて
いるが、これらの方法は高価であるか、あるいは
十分な効果が得られないかのいづれかであつた。 In conventional continuous casting methods, methods for improving non-metallic inclusions include special treatment of the molten metal, increasing the temperature at which the molten metal is poured into the mold, and methods of preventing oxidation of the molten metal. However, these methods were either expensive or not sufficiently effective.
本発明は金属を連続鋳造するに際し、非金属介
在物の少ない鋳片を製造すること、および凝固時
間を短くし鋳造能力を大きくすることを目的と
し、その特徴とするところは、溶融金属の連続鋳
造にあたり、タンデイツシユ・鋳型間で鋳型に連
通するノズル通過中の溶融金属を、該溶融金属の
流動性保持可能温度域、即ち凝固点近傍もしくは
凝固点以下で該凝固点に近接した温度域まで冷却
（急冷もしくは過冷）して鋳造することにある。 The purpose of the present invention is to produce slabs with fewer non-metallic inclusions and to shorten solidification time and increase casting capacity when continuously casting metal. During casting, the molten metal passing through a nozzle that communicates with the mold between the tundish and the mold is cooled (quenched or The method is to supercool the material and then cast it.
一般に、非金属介在物は耐火物が溶融金属中に
巻込まれた場合と、脱酸生成物に大別でき、鋼の
場合、特にキルド鋼の場合はアルミナ系とシリケ
ート系が主である。これらの非金属介在物のう
ち、融点が被鋳造金属のそれよりも高い場合に本
発明が実施でき、鋼の場合のアルミナ系介在物お
よびシリケート系介在物は本発明の対象となる。 In general, nonmetallic inclusions can be broadly classified into those when refractories are involved in molten metal, and those that are deoxidized products.In the case of steel, especially killed steel, they are mainly alumina-based and silicate-based. Among these nonmetallic inclusions, the present invention can be carried out when the melting point is higher than that of the metal to be cast, and the present invention applies to alumina-based inclusions and silicate-based inclusions in the case of steel.
本発明者等は本発明の完成に先立つて種々研究
を重ねた結果、従来溶融金属の注入ノズル保護、
つまり寿命延長に主眼をおいて採られてきた諸施
策に代わり、むしろ注入ノズル自体を非金属介在
物の過器として認識することで、上述の目的を
達成すべく溶融金属流路である注入ノズルを冷却
することで、間接的に溶融金属を冷却することを
着眼したのである。 As a result of various researches conducted by the present inventors prior to the completion of the present invention, the present inventors discovered that conventional molten metal injection nozzle protection,
In other words, instead of the measures that have been taken with the main focus on extending the life of the injection nozzle, the injection nozzle, which is a molten metal flow path, can be used to achieve the above purpose by recognizing the injection nozzle itself as a container for non-metallic inclusions. The idea was to indirectly cool the molten metal by cooling it.
以下、本発明の実施態様を示すと次の通りであ
る。 Embodiments of the present invention will be described below.
ノズルを長くする。従来設備をそのまま用い
る場合で、タンデイツシユと鋳型の間隔が固定
されている場合は、第１図に示す様にノズルを
蛇行あるいは彎曲させて長くし、冷却しやすく
する。 Make the nozzle longer. When using conventional equipment as is and the distance between the tundish and the mold is fixed, the nozzle is meandered or curved to make it longer as shown in Figure 1 to facilitate cooling.
因みに、第１図の１はタンデイツシユ、２は
ストツパー、３は本発明実施に供するノズルで
直管部下端に曲管部を形成するとともに、流路
の適宜部位に堰例えばトンネル堰４を設けてい
る。６は連続鋳造鋳型、７は強制冷却装置で、
例えば冷却フアンが用いられる。 Incidentally, in FIG. 1, 1 is a tundish, 2 is a stopper, and 3 is a nozzle for carrying out the present invention, which has a curved pipe part formed at the lower end of the straight pipe, and a weir, for example, a tunnel weir 4, is provided at an appropriate part of the flow path. There is. 6 is a continuous casting mold, 7 is a forced cooling device,
For example, a cooling fan is used.
ノズルの外部を強制空冷または水冷する。 Forced air or water cooling on the outside of the nozzle.
第２図に示すようにノズルを分岐し、注入金
属のノズル内面との接触面積を増大する。 As shown in FIG. 2, the nozzle is branched to increase the contact area of the implanted metal with the inner surface of the nozzle.
因みに第２図の１はタンデイツシユ、２はス
トツパー、３′はノズルの分岐管、５，５′はノ
ズルの分岐管３′の上・下部に設けた開閉弁
（以下バルブと称する）である。６は連続鋳造
鋳型である。 Incidentally, in FIG. 2, 1 is a tundish, 2 is a stopper, 3' is a branch pipe of the nozzle, and 5 and 5' are on-off valves (hereinafter referred to as valves) provided above and below the branch pipe 3' of the nozzle. 6 is a continuous casting mold.
取鍋内またはタンデイツシユ内の溶融金属の
温度を低下する。 Reduce the temperature of the molten metal in the ladle or tundish.
以上の何れかの方法によりノズル内の溶融金
属の温度を凝固点近傍まで低下すると、アルミ
キルド鋼の場合には、アルミナがノズル内に付
着し次第に成長して、ついにはノズルクロスと
なる。この場合には迅速に次のノズルと交換す
る。鋳型内に流入する溶鋼は、ノズル内で除去
された量だけアルミナが減少している。またシ
リコンキルド鋼の場合は、ノズル内にはシリケ
ート系介在物が主として付着しており、溶鋼中
の介在物はその分少なくなつている。 When the temperature of the molten metal in the nozzle is lowered to near the freezing point by any of the above methods, in the case of aluminum killed steel, alumina adheres to the inside of the nozzle and gradually grows, eventually forming a nozzle cloth. In this case, immediately replace the nozzle with the next nozzle. The molten steel flowing into the mold has alumina reduced by the amount removed in the nozzle. In the case of silicon-killed steel, silicate-based inclusions are mainly adhered inside the nozzle, and the number of inclusions in the molten steel is correspondingly reduced.
の場合のノズルの長さは、従来法より長くす
る。従来法ではノズル内での溶融金属の温度低下
を防ぎ、ノズルクロスを防ぐために短かく設計さ
れており、１ｍを超えることはなかつた。本発明
では鋳型に対してタンデイツシユ高さを１ｍ以上
高くして、ノズル内の圧力を上昇せしめ、第１図
に示すように流速が遅くかつ非金属介在物が滞り
やすい様な背部例えばトンネル堰４を設けること
が望ましい。又ノズルは直管を用いることが出来
るが、この場合は凝固点近傍まで冷却するに十分
な長さと、流速が遅くなり、湯が淀み非金属介在
物がノズル壁へ付着するのを促進する様な拡大部
を途中に形成させることが望ましい。さらにの
方法により、ノズルの長さは短縮できる。 In this case, the length of the nozzle should be longer than that of the conventional method. In the conventional method, the nozzle was designed to be short in order to prevent the temperature of the molten metal from decreasing in the nozzle and to prevent nozzle crossing, and the length did not exceed 1 m. In the present invention, the height of the tundish is increased by 1 m or more relative to the mold to increase the pressure inside the nozzle, and as shown in FIG. It is desirable to provide In addition, a straight pipe can be used for the nozzle, but in this case, it must be long enough to cool the water to near the freezing point, and must be long enough to slow the flow rate so that the hot water stagnates and non-metallic inclusions adhere to the nozzle wall. It is desirable to form an enlarged part in the middle. A further method allows the length of the nozzle to be reduced.
の方法は、第２図に示す様にノズルを分岐す
るだけではなく、バルブ５，５′を開閉すること
によつて、ノズルクロスを生じたノズルは閉鎖
し、新しいノズルへ切替ることも出来る。 This method not only branches the nozzles as shown in Figure 2, but also closes the nozzle that has caused the nozzle cross and switches to a new nozzle by opening and closing valves 5 and 5'. .
また、ノズルクロスを生じたノズルは、バルブ
５，５′を閉じて、その間にノズルを新品と交換
することが出来る。 Further, in the case of a nozzle in which nozzle cross has occurred, the valves 5 and 5' can be closed, and the nozzle can be replaced with a new one during that time.
ノズルクロスを生じたノズルを迅速に交換する
装置例としては、第３図に示す様に、ノズル３″
の中間部にノズルクロスが生じやすい様な隘路８
と拡大部９を設け、周囲を空冷した複数箇のノズ
ルを円弧上に並べて、回転できるフレーム１１上
に固定し、該回転フレーム上のノズルの上下端
は、それぞれタンデイツシユ側注入端１２と鋳型
側注入端１３に摺動着脱できる構造とする。さら
にノズル境界部のシールを完全に行なうため、回
転フレームに対しタンデイツシユ側ノズル端およ
び鋳型側ノズル端を押圧し、かつ、境界部近傍を
不活性気体で充満する。 As an example of a device for quickly replacing a nozzle that has caused a nozzle cross, as shown in Fig. 3, the nozzle 3''
bottleneck where nozzle cross is likely to occur in the middle part 8
A plurality of nozzles with air-cooled surroundings are arranged in a circular arc and fixed on a rotatable frame 11, and the upper and lower ends of the nozzles on the rotating frame are connected to the tundish side injection end 12 and the mold side, respectively. It has a structure that allows it to be slidably attached to and detached from the injection end 13. Furthermore, in order to completely seal the nozzle boundary, the tundish-side nozzle end and the mold-side nozzle end are pressed against the rotating frame, and the vicinity of the boundary is filled with inert gas.
本発明は上述したように構成し且つ用いること
により、非金属介在物の除去が行なわれ、該非金
属介在物の少ない鋳片が製造でき、凝固時間の短
縮から鋳造能力の向上につながるなど、品質とと
もに生産性の向上に寄与する効果が大きい。 By configuring and using the present invention as described above, non-metallic inclusions are removed, slabs with fewer non-metallic inclusions can be manufactured, and quality is improved by shortening solidification time and improving casting ability. At the same time, it has a large effect in contributing to improving productivity.
第１図は、本発明の実施に供するノズル形態の
一装置例を示す図、第２図は、本発明の実施に供
するノズル形態の他の装置例を示す図、第３図
は、とくにノズル交換を容易にする本発明の実施
に供するノズル形態の一装置例を示す図。
１…タンデイツシユ、２…ストツパー、３，
３′，３″…ノズル、４…トンネル堰、５…弁、６
…鋳型、７…冷却フアン、８…ノズルの隘路、９
…ノズルの拡大部、１０…冷却空気孔、１１…回
転フレーム、１２…タンデイツシユ側注入端、１
３…鋳型側注入端。
FIG. 1 is a diagram showing an example of a device in a nozzle form used for carrying out the present invention, FIG. 2 is a diagram showing another example of a device in a nozzle form used for carrying out the present invention, and FIG. The figure which shows the example of the apparatus of the nozzle form used for implementation of this invention which facilitates exchange. 1...Tandateshiyu, 2...Stopper, 3,
3', 3''...Nozzle, 4...Tunnel weir, 5...Valve, 6
... Mold, 7... Cooling fan, 8... Nozzle bottleneck, 9
...Enlarged part of nozzle, 10...Cooling air hole, 11...Rotating frame, 12...Tundish side injection end, 1
3... Mold side injection end.
Claims (1)
ユと鋳型間で鋳型に連通するノズル通過中の溶融
金属を、流動性保持可能温度域まで冷却して、該
溶融金属中の介在物を、該ノズル内に析出せしめ
て浄化するとともに、該ノズルをノズルクロスを
生じた時点で置換しつつ鋳造することを特徴とす
る連続鋳造法。1. During continuous casting of molten metal, the molten metal passing through a nozzle communicating with the mold between the tundish and the mold is cooled to a temperature range that can maintain fluidity, and inclusions in the molten metal are precipitated in the nozzle. A continuous casting method characterized in that casting is performed while at least purifying the nozzle and replacing the nozzle at the time when nozzle cross occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4256979A JPS55136550A (en) | 1979-04-10 | 1979-04-10 | Continuous casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4256979A JPS55136550A (en) | 1979-04-10 | 1979-04-10 | Continuous casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55136550A JPS55136550A (en) | 1980-10-24 |
| JPS632702B2 true JPS632702B2 (en) | 1988-01-20 |
Family
ID=12639686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4256979A Granted JPS55136550A (en) | 1979-04-10 | 1979-04-10 | Continuous casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55136550A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4319966A1 (en) * | 1993-06-17 | 1994-12-22 | Didier Werke Ag | Immersion spout |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50148232A (en) * | 1974-05-22 | 1975-11-27 |
-
1979
- 1979-04-10 JP JP4256979A patent/JPS55136550A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50148232A (en) * | 1974-05-22 | 1975-11-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55136550A (en) | 1980-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3519059A (en) | Method of vacuum slag refining of metal in the course of continuous casting | |
| US4715586A (en) | Continuous caster tundish having wall dams | |
| KR100432093B1 (en) | Strip casting | |
| US3771584A (en) | Method for continuously casting steel billet strands to minimize the porosity and chemical segregation along the center line of the strand | |
| JPS6099462A (en) | Device for discharging molten metal | |
| JPS632702B2 (en) | ||
| CN105682825A (en) | Continuous casting method | |
| JP3018960B2 (en) | Continuous casting method and its straight immersion nozzle | |
| US3153822A (en) | Method and apparatus for casting molten metal | |
| CN110756752B (en) | Strip continuous casting flow distribution deslagging method | |
| KR20090105371A (en) | Shroud nozzle for continuous casting | |
| USRE30979E (en) | Method and apparatus for casting metals | |
| CN104325103B (en) | The molding casting method of steel band fed by a kind of crystallizer | |
| CN215144656U (en) | Casting ladle with good heat preservation effect | |
| JP3546137B2 (en) | Steel continuous casting method | |
| CA1104323A (en) | Method and apparatus for the continuous casting of steel slabs | |
| JPH03118943A (en) | Mold and method for continuously casting low and medium carbon steel | |
| JPS6163342A (en) | Method and device for producing hollow steel ingot | |
| US7316338B2 (en) | Device for discharging molten metal from a container | |
| JPH08141703A (en) | Production of ingot having shrinkage cavity in center part | |
| CA1108373A (en) | Method and apparatus for casting metals | |
| KR100367453B1 (en) | Continuous Casting Mold with Gate and Gas curtain for the Metal-Casting Process | |
| KR200217173Y1 (en) | Continuous Casting Mold with Gate and Gas curtain for the Metal-Casting Process | |
| JPH0338017B2 (en) | ||
| SU1740123A1 (en) | Method and apparatus for continuous ingot casting |