JPS62168660A - Molten metal discharging device - Google Patents
Molten metal discharging deviceInfo
- Publication number
- JPS62168660A JPS62168660A JP888586A JP888586A JPS62168660A JP S62168660 A JPS62168660 A JP S62168660A JP 888586 A JP888586 A JP 888586A JP 888586 A JP888586 A JP 888586A JP S62168660 A JPS62168660 A JP S62168660A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- refractories
- refractory
- passage hole
- fixed plate
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 title claims abstract description 39
- 238000007599 discharging Methods 0.000 title abstract description 3
- 239000011819 refractory material Substances 0.000 claims abstract description 25
- 239000011148 porous material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 20
- 239000010959 steel Substances 0.000 abstract description 20
- 238000005470 impregnation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 27
- 230000000694 effects Effects 0.000 description 10
- 238000009749 continuous casting Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring 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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/42—Features relating to gas injection
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は溶融金属を鋳造する際、取鍋あるいはタンディ
ツシュの底部に取付けられる溶融金属排出装置の改良に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a molten metal discharge device that is attached to the bottom of a ladle or tundish when molten metal is cast.
連続鋳造法により溶鋼を鋳造する場合、溶鋼を収容する
取鍋あるいはタンディツシュ底部に固定盤と摺動盤（ス
ライド盤）とからなる溶融金属排出装置（スライディン
グゲート）を取（（け、スライド盤を固定盤に対してス
ライドさせることにより、溶鋼の通過孔を開閉し、溶鋼
の流量を調節するようにしている。When casting molten steel using the continuous casting method, a molten metal discharge device (sliding gate) consisting of a fixed plate and a sliding plate is installed at the bottom of the ladle or tundish containing the molten steel. By sliding it relative to the fixed plate, the molten steel passage hole is opened and closed, and the flow rate of molten steel is adjusted.
この溶融金属排出装置においては、溶鋼の通過孔が溶鋼
の凝固やＡｎ、Ｔｉ、Ｃａ、Ｃｒ、Ｎｉ等の金属の酸化
物の付着により閉塞するのを防止するために固定盤から
溶鋼中にＡｒ等の不活性ガスを供給することが行なわれ
ている。In this molten metal discharge device, in order to prevent the molten steel passage hole from being blocked due to solidification of the molten steel or adhesion of oxides of metals such as An, Ti, Ca, Cr, and Ni, Ar is introduced into the molten steel from a fixed plate. Supplying inert gases such as
従来、溶融金属排出装置の固定盤は、その通過孔周囲の
耐火物を多孔質耐火物で構成し、この多孔質耐火物の周
囲に固定盤外部と連通ずるガス均圧帯を設けた構造のも
のが用いられていた。そして、外部から供給した不活性
ガスを、ガス均圧帯を通して多孔質耐火物から溶鋼中に
バブリングさせることにより、」二連したような通過孔
の閉塞を防止していた。Conventionally, the fixed plate of a molten metal discharge device has a structure in which the refractory around the passage hole is made of porous refractory, and a gas equalization zone is provided around the porous refractory, which communicates with the outside of the fixed plate. things were being used. By bubbling inert gas supplied from the outside into the molten steel from the porous refractory through the gas equalization zone, clogging of the double passage holes was prevented.
しかし、このように固定盤の通過孔周囲の耐火物を多孔
質耐火物で構成した場合、溶鋼中にバブリングされるガ
スの気泡径が小さいため、溶鋼の攪拌力が小さく、通過
孔の閉塞を確実に防止することが困難であった。しかも
、多孔質耐火物は耐蝕性に劣るうえ、気孔に地金やスラ
グが侵入するため、ガスのコントロールが困難となり、
使用時間の経過とともに通過孔の閉塞を防止する効果が
小さくなるという欠点があった。However, when the refractories around the passage holes of the fixed plate are made of porous refractories, the bubble diameter of the gas bubbled into the molten steel is small, so the stirring force of the molten steel is small and the passage holes are not clogged. It was difficult to reliably prevent this. Moreover, porous refractories have poor corrosion resistance, and because metal and slag invade the pores, it becomes difficult to control gas.
There is a drawback that the effect of preventing blockage of the passage hole decreases with the passage of time of use.
このような欠点を解消するために、本発明者らは固定盤
の通過孔周囲の耐火物を、ガス均圧帯と通過孔との間を
連通ずる複数の貫通孔（小孔あるいはスリット）を有す
る緻密質耐火物で構成した溶融金属排出装置を提案して
いる（特願昭５８−２０６４７７〜２０６４７９号）。In order to eliminate these drawbacks, the present inventors created a plurality of through holes (small holes or slits) in the refractory around the passage hole of the fixed plate to communicate between the gas equalization zone and the passage hole. has proposed a molten metal discharge device constructed of a dense refractory having the following properties (Japanese Patent Application Nos. 58-206477 to 206479).
上記のように固定盤周囲の耐火物を貫通孔を有する緻密
質耐火物で構成すれば、溶鋼中にバブリングされるガス
の気泡径が大きくなるため、通過孔の閉塞を防止する効
果が大きくなる。また、溶鋼に対する耐蝕性も向上でき
、噴出力の強いガスにより地金やスラグの侵入も防止す
ることができるので、長時間使用しても通過孔の閉塞を
防止する効果を維持できる。If the refractory around the fixed plate is made of a dense refractory with through holes as described above, the bubble diameter of the gas bubbled into the molten steel will increase, which will increase the effect of preventing the passage holes from clogging. . In addition, the corrosion resistance against molten steel can be improved, and the gas with a strong ejection force can prevent the intrusion of metal and slag, so that the effect of preventing blockage of the passage hole can be maintained even after long-term use.
ところで２近年、ＨＣＲ（Ｈｏｔ ＣｈａｒｇｅＲｏ
ｌｌｉｎｇ） 、 ＨＤＲ（Ｈｏｔ Ｄｉｒｅｃｔ
Ｒｏｌｌｉｎｇ）等の直接圧延技術が確立されてきてい
る。こうした直接圧延技術では、連続鋳造された鋳片を
そのまま圧延するので、表面研磨あるいはスカーフィン
グ等が行なえない。このため、連続鋳造された鋳片が良
好な表面性状を有することが要求されている。By the way, in recent years, HCR (Hot ChargeRo)
lling), HDR (Hot Direct
Direct rolling techniques such as rolling) have been established. In this direct rolling technique, continuously cast slabs are rolled as they are, so surface polishing or scarfing cannot be performed. For this reason, continuously cast slabs are required to have good surface properties.
しかし、固定盤周囲の耐火物を貫通孔を有する緻密質耐
火物で構成した溶融金属排出装置を用いて連続鋳造され
た鋳片では、大きなどンホールが発生するなどして、Ｈ
ＣＲ，ＨＤＲ等の技術で要求される良好な表面性状が得
られないという欠点があった。However, in slabs that are continuously cast using a molten metal discharge device in which the refractory around the fixed plate is made of dense refractory with through holes, large holes occur and H
There was a drawback that good surface properties required by technologies such as CR and HDR could not be obtained.
本発明は上記事情を考慮してなされたものであり、通過
孔の閉塞を招くことなく表面性状の良好な鋳片が得られ
る溶融金属排出装置を提供しようとするものである。The present invention has been made in consideration of the above circumstances, and it is an object of the present invention to provide a molten metal discharge device that can obtain slabs with good surface properties without causing blockage of the passage holes.
本発明の溶融金属排出装置は、固定盤の通過孔周囲の耐
火物の周囲に固定盤外部と連通するガス均圧帯を設け、
前記耐火物を上部の多孔質耐火物及び前記ガス均圧帯と
通過孔とを連通ずる貫通孔を有する下部の緻密質耐火物
により構成したことを特徴とするものである。The molten metal discharge device of the present invention provides a gas equalization zone around the refractory material around the passage hole of the fixed plate, which communicates with the outside of the fixed plate,
The refractory is characterized by comprising an upper porous refractory and a lower dense refractory having a through hole communicating the gas equalization zone and the passage hole.
このような溶融金属排出装置によれば、下部の緻密質耐
火物に設けられた貫通孔からバブリングされる、噴出力
の強い大きな気泡により通過孔の閉塞を確実に防止する
ことができる。また、大きな気泡だけであると、鋳片の
表面性状が悪化するが、上部の多孔質耐火物から小さい
気泡がバブリングされ、大きい気泡の割合が相対的に少
なくなるので、従来よりも鋳片の表面性状が良好となる
。なお、上部の多孔質耐火物からバブリングされる気泡
は小さく、こうした小さい気泡のみであると浮上刃が小
さいが、下部の緻密質耐火物からバブリングされる大き
な気泡により浮上刃が補われる。According to such a molten metal discharge device, blockage of the passage hole can be reliably prevented by large bubbles with a strong ejection force that are bubbled from the through hole provided in the lower dense refractory. In addition, if there are only large air bubbles, the surface quality of the slab will deteriorate, but small air bubbles are bubbled from the upper porous refractory, and the proportion of large air bubbles is relatively small, so the surface quality of the slab becomes worse than before. The surface quality becomes better. Note that the air bubbles bubbling from the upper porous refractory are small, and if only such small air bubbles exist, the floating blade is small, but the floating blade is compensated for by the large air bubbles bubbling from the lower dense refractory.
なお、固定盤の通過孔周囲の耐火物を構成、する上部の
多孔質耐火物と一ド部の緻密質耐火物との高さの比は１
：２〜２：１であることが望ましい。In addition, the height ratio of the upper porous refractory and the dense refractory in the upper part, which constitutes the refractory around the passage hole of the fixed plate, is 1.
:2 to 2:1 is desirable.
これは多孔質耐火物の比率が大きくなると通過孔の閉塞
を防［トする効果が小さくなり、一方縁密質耐火物の比
率が大きくなると鋳片の表面性状を改善する効果が小さ
くなるためである。This is because as the proportion of porous refractories increases, the effect of preventing blockage of passage holes decreases, while as the proportion of dense edge refractories increases, the effect of improving the surface properties of the slab decreases. be.
また、固定盤の通過孔周囲の耐火物を構成する下部の緻
密質耐火物に設けられる貫通孔は、溶融金属の通過孔の
絞り時の摺動盤の移動方向と反対側の面に１８０６以内
の範囲で設けることが望ましい。これは、通過孔の絞り
側で溶融金属の滞留が生じ易いので、滞留した溶融金属
を充分に攪拌するためである。In addition, the through holes provided in the lower dense refractory constituting the refractories around the passage holes of the fixed plate should be within 180mm on the surface opposite to the direction of movement of the sliding plate when narrowing the passage holes for molten metal. It is desirable to provide it within the range of . This is because molten metal tends to stagnate on the constricted side of the passage hole, so the molten metal that stagnates is sufficiently stirred.
また、貫通孔の孔径は０．２〜０．４ ｍｍであること
が望ましい。これは、貫通孔の孔径が０．２ ｍｍ未満
であると通過孔の閉塞を防ＩＩ−する効果が少なくなり
、−方０．４ ｍｍを超えると鋳片の表面性状を改善す
る効果が少ないためである。Further, it is desirable that the diameter of the through hole is 0.2 to 0.4 mm. This is because if the diameter of the through hole is less than 0.2 mm, the effect of preventing blockage of the through hole will be reduced, and if the diameter exceeds 0.4 mm, the effect of improving the surface quality of the slab will be less. It's for a reason.
更に、固定盤の通過孔周囲の耐火物を構成するＦ、部の
多孔質耐火物の気孔径は１００〜８００ＩＬｍであるこ
とが望ましい。Further, it is desirable that the pore diameter of the porous refractory in the F section constituting the refractory around the passage hole of the fixed plate is 100 to 800 ILm.
以下、本発明の実施例を図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図に示すように、本発明に係る溶融金属排出装置は
それぞれ溶鋼の通過孔を有する上固定盤１、スライド盤
２及び下固定＠３から構成されている。前記上固定盤１
の本体は緻密質耐火物がらなり、その通過孔−［一部の
周囲は上部の多孔質耐火物４と下部の緻密質耐火物５と
で構成されるガス供給用耐火物となっており、このガス
供給用耐火物と上固定盤１本体との間にはガス均圧体６
が設けられている。前記多孔質耐火物４としては圧縮強
さが約５００ ｋｇ／ ｍｍ２テ、気孔径が１００〜７
００μｍの材質が用いられている。前記緻密質耐火物５
としては圧縮強さ約７００ ｋｇ／ ｍｍ２の材質が用
いられ、第２図に示すように通過孔の絞り時のスライド
盤２の移動方向（図中右方向）と反対側の面（図中左側
の面）に１８０’以内の範囲で、ガス均圧帯６と通過孔
との間を連通ずる孔径０．４ ｍｍｍトド貫通孔７、・
・・が１０〜１５個設けられている。これらガス供給用
耐火物を構成する多孔質耐火物４と緻密質耐火物５との
高さの比は約２：１に設計されており、両者を同時成形
した後タール含浸処理又はコーキング処理を施してガス
供給用耐火物を形成する。また、上固定＠１本体にはガ
ス均圧帯６と連通ずるガス導入孔８が形成され、このガ
ス導入孔８にはガス導入管９が接続されている。As shown in FIG. 1, the molten metal discharge device according to the present invention is composed of an upper fixed plate 1, a slide plate 2, and a lower fixed plate @3, each having a passage hole for molten steel. The upper fixed plate 1
The main body of the refractory is made of a dense refractory, and a part of the periphery of the passage hole is a gas supply refractory consisting of an upper porous refractory 4 and a lower dense refractory 5, A gas pressure equalizer 6 is provided between this gas supply refractory and the upper fixed plate 1 body.
is provided. The porous refractory 4 has a compressive strength of about 500 kg/mm2 and a pore diameter of 100 to 7.
00 μm material is used. The dense refractory 5
A material with a compressive strength of about 700 kg/mm2 is used as the material. A through hole 7 with a hole diameter of 0.4 mm that communicates between the gas pressure equalization zone 6 and the passage hole within a range of 180' on the plane).
10 to 15... are provided. The height ratio of the porous refractories 4 and the dense refractories 5 constituting these gas supply refractories is designed to be about 2:1, and after both are molded simultaneously, they are subjected to tar impregnation treatment or coking treatment. to form a gas supply refractory. Further, a gas introduction hole 8 communicating with the gas pressure equalizing zone 6 is formed in the upper fixing@1 body, and a gas introduction pipe 9 is connected to this gas introduction hole 8.
この溶融金属排出装置は例えば図示しないタンディツシ
ュの底部に固定された上ノズルに取付けられて使用され
る。前記スライド盤２は上固定盤１と下固定盤３との間
をスライドすることによって通過孔を開閉し、溶鋼の流
量の調節及び通過孔の完全な閉鎖を行なう。また、前記
下固定＠３の下方には図示しない浸漬ノズルが取付けら
れ、この浸漬ノズルの下端部は図示しないモールド内に
挿入される。This molten metal discharge device is used, for example, by being attached to an upper nozzle fixed to the bottom of a tundish (not shown). The slide plate 2 opens and closes the passage hole by sliding between the upper fixed plate 1 and the lower fixed plate 3, thereby adjusting the flow rate of molten steel and completely closing the passage hole. Further, an immersion nozzle (not shown) is attached below the lower fixing @3, and the lower end of this immersion nozzle is inserted into a mold (not shown).
Ｊ−記装置を用い、タンディツシュ内の溶鋼を上ノズル
、−ｈ固定盤１、スライド盤２、下固定盤３及び浸漬ノ
ズルの通過孔を順次通過させてモールド内で冷却さゼる
。そして、鋳込み前及び鋳込み中にガス供給用耐火物を
構成する多孔質耐火物４及び緻密質耐火物５の貫通孔６
からＡｒｌの不活性ガスを溶鋼中にバブリングさせる。Using the device described in J-, the molten steel in the tundish is cooled in the mold by passing through the upper nozzle, -h fixed plate 1, slide plate 2, lower fixed plate 3, and the passage hole of the immersion nozzle in order. The through holes 6 of the porous refractory 4 and the dense refractory 5 that constitute the gas supply refractory before and during casting are
An inert gas of Arl is bubbled into the molten steel.
このような溶融金属排出装置によれば、」１固定盤１の
通過孔周囲のガス供給用耐火物を構成する下部の緻密質
耐火物５に設けられた貫通孔７、・・・からバブリング
される、噴出力の強い大きな気泡により通過孔の閉塞を
確実に防Ｉトすることができる。また、大きな気泡だけ
であると、鋳片の表面性状が悪化するが、ガス供給用耐
火物を構成する一上部の多孔質耐火物４から小さい気泡
がバブリングされ、大きい気泡の割合が相対的に少なく
なるので、従来よりも鋳片の表面性状が良好となる。According to such a molten metal discharge device, bubbles are bubbled from the through holes 7 provided in the lower dense refractory 5 constituting the gas supply refractory around the passage hole of the fixed plate 1. The passage hole can be reliably prevented from being clogged by large bubbles with a strong ejection force. In addition, if there are only large bubbles, the surface quality of the slab will deteriorate, but small bubbles are bubbled from the upper porous refractory 4 that constitutes the gas supply refractory, and the proportion of large bubbles is relatively low. Since the amount is reduced, the surface quality of the slab becomes better than before.
実際にこの溶融金属排出装置を容量３０ｈンのタンディ
ツシュのストランドに取付けて連続鋳造を行なったとこ
ろ、湯溜め高さを５００■として９８％以上の自然開孔
率を得ることができた。When this molten metal discharge device was actually attached to the strand of a 30-hour capacity tundish and continuous casting was performed, a natural porosity of over 98% could be obtained with a sump height of 500 square meters.
次に、貫通孔の位置及び孔径と、鋳片に発生するピンホ
ール径との関係を調べるために１種々の溶融金属排出装
置をタンディツシュに取付けて連続鋳造を行なった。用
いた実施例１〜３の溶融金属排出装置は上固定盤１の通
過孔周囲のガス供給用耐火物が、上部の多孔質耐火物と
下部の緻密質耐火物とで構成されるものであるが、緻密
質耐火物に設けられる貫通孔の位置と孔径が異なるもの
である。すなわち、実施例１は貫通孔が緻密質耐火物の
全周にわたって形成されており、孔径が０．４１１！１
以上のもの、実施例２は貫通孔が緻密質耐火物の絞り時
のスライド盤の移動方向と反対側の面に１８０°以内の
範囲で形成されており、孔径が０．４ｍｍ以上のもの、
実施例３は貫通孔が緻密質耐火物の絞り時のスライド盤
の移動方向と反対側の面に１８０°以内の範囲で形成さ
れており、孔径が０．２〜０．４■のもの（第１図及び
第２図図示のもの）である。Next, in order to investigate the relationship between the position and diameter of the through hole and the diameter of the pinhole generated in the slab, continuous casting was carried out by attaching various molten metal discharge devices to the tundish. In the molten metal discharge devices of Examples 1 to 3 used, the gas supply refractory around the passage hole of the upper fixed platen 1 is composed of an upper porous refractory and a lower dense refractory. However, the positions and diameters of the through holes provided in the dense refractories are different. That is, in Example 1, the through holes are formed all around the dense refractory, and the hole diameter is 0.411!1.
In the above example 2, the through hole is formed within 180 degrees on the surface opposite to the moving direction of the slide plate during drawing of the dense refractory, and the hole diameter is 0.4 mm or more.
In Example 3, the through holes were formed within 180 degrees on the surface opposite to the direction of movement of the slide plate during drawing of the dense refractory, and the hole diameter was 0.2 to 0.4 square meters ( 1 and 2).
なお、タンディツシュ内には低炭素アルミギルド鋼の溶
鋼を収容し、溶鋼温度を１５４０〜１５６０℃に維持し
た。また、ノズル孔径は７０ｍｍ、モールドの寸法は２
２０ｍｍＸ１５００ｍｍであった。そして、ノズル孔の
直径を２５〜４５ｍｍの範囲で塞ぐようにスライド盤を
スライドさせて絞り度合を調節し、０．９５〜１．２５
ｍ ／ ｗｉｎの鋳込み速度で連続鋳造を行なった。The tundish contained molten steel of low carbon aluminum guild steel, and the molten steel temperature was maintained at 1540 to 1560°C. In addition, the nozzle hole diameter is 70 mm, and the mold dimensions are 2
It was 20mm x 1500mm. Then, adjust the aperture degree by sliding the slide plate so as to close the nozzle hole diameter in the range of 25 to 45 mm.
Continuous casting was carried out at a casting speed of m/win.
得られた鋳片の単位長さ当りのピンホールの発生度合を
第３図に示す。第３図から明らかなように、実施例３の
ように貫通孔を緻密質耐火物の絞り時のスライド盤の移
動方向と反対側の面に１８０６以内の範囲で形成し、孔
径を０．２〜０．４ｍｍとした場合には、ピンホールの
発生度合が大幅に減少していることがわかる。FIG. 3 shows the degree of pinhole occurrence per unit length of the obtained slab. As is clear from FIG. 3, as in Example 3, through-holes were formed within a range of 1806 mm on the surface opposite to the direction of movement of the slide plate during drawing of the dense refractory, and the hole diameter was 0.2 mm. It can be seen that when the diameter is set to 0.4 mm, the degree of occurrence of pinholes is significantly reduced.
以上詳述した如く本発明の溶融金属排出装置によれば、
通過孔の閉塞を招くことなく表面性状の良好な鋳片が得
られ、直接圧延技術の適用も可能になる等顕著な効果を
奏するものである。As detailed above, according to the molten metal discharge device of the present invention,
This method has remarkable effects such as obtaining slabs with good surface properties without causing blockage of the passage holes, and making it possible to apply direct rolling technology.
第１図は本発明の一実施例における溶融金属排出装置の
縦断面図、第２図は同溶融金属排出装置のガス供給用耐
火物を構成する緻密質耐火物の横断面図、第３図は実施
例１〜３の溶融金属排出装置を用いて得られる鋳片の単
位長さ当りのピンホールの発生度合を示す特性図である
。
１・・・」−固定盤、２・・・スライド盤、３・・・下
固定盤、４・・・多孔質耐火物、５・・・緻密質耐火物
、６・・・ガス均圧帯、７・・・貫通孔、８・・・ガス
導入孔、９・・・ガス導入管。
出願人代理人 弁理士 鈴江 武彦
第１図
第２図FIG. 1 is a longitudinal cross-sectional view of a molten metal discharge device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a dense refractory that constitutes the gas supply refractory of the molten metal discharge device, and FIG. is a characteristic diagram showing the degree of occurrence of pinholes per unit length of slabs obtained using the molten metal discharging apparatus of Examples 1 to 3. 1..." - fixed plate, 2... sliding plate, 3... lower fixed plate, 4... porous refractory, 5... dense refractory, 6... gas equalization zone , 7... Through hole, 8... Gas introduction hole, 9... Gas introduction pipe. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2
Claims (5)
れ、溶融金属の通過孔を有する固定盤と、この固定盤に
対して摺動することにより溶融金属の通過孔を開閉する
摺動盤とを具備した溶融金属排出装置において、前記固
定盤の通過孔周囲の耐火物の周囲に固定盤外部と連通す
るガス均圧帯を設け、前記耐火物を上部の多孔質耐火物
及び前記ガス均圧帯と通過孔とを連通する貫通孔を有す
る下部の緻密質耐火物により構成したことを特徴とする
溶融金属排出装置。(1) A fixed plate that is attached to a nozzle at the bottom of a container containing molten metal and has a passage hole for the molten metal, and a sliding plate that opens and closes the passage hole for the molten metal by sliding against the fixed plate. In the molten metal discharge device, a gas pressure equalization zone communicating with the outside of the fixed plate is provided around the refractory around the passage hole of the fixed plate, and the refractory is connected to the upper porous refractory and the gas pressure equalized. A molten metal discharge device characterized in that the lower part is made of a dense refractory material having a through hole that communicates between the band and the passage hole.
孔質耐火物と下部の緻密質耐火物との高さの比を１：２
〜２：１としたことを特徴とする特許請求の範囲第１項
記載の溶融金属排出装置。(2) The height ratio of the upper porous refractory and the lower dense refractory constituting the refractory around the passage hole of the fixed plate is 1:2.
The molten metal discharge device according to claim 1, characterized in that the ratio is 2:1.
密質耐火物に設けられる貫通孔を、溶融金属の通過孔の
絞り時の摺動盤の移動方向と反対側の面に１８０°以内
の範囲で設けたことを特徴とする特許請求の範囲第１項
記載の溶融金属排出装置。(3) A through-hole provided in the lower dense refractory constituting the refractory around the passage hole of the fixed plate is placed on the surface opposite to the direction of movement of the sliding plate when narrowing the passage hole of molten metal. 2. The molten metal discharge device according to claim 1, wherein the molten metal discharge device is provided within a range of .degree.
特徴とする特許請求の範囲第３項記載の溶融金属排出装
置。(4) The molten metal discharge device according to claim 3, wherein the through hole has a diameter of 0.2 to 0.4 mm.
孔質耐火物の気孔径が１００〜８００μｍであることを
特徴とする特許請求の範囲第１項記載の溶融金属排出装
置。(5) The molten metal discharge device according to claim 1, wherein the upper porous refractory constituting the refractory around the passage hole of the fixed plate has a pore diameter of 100 to 800 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP888586A JPH0665432B2 (en) | 1986-01-21 | 1986-01-21 | Molten metal discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP888586A JPH0665432B2 (en) | 1986-01-21 | 1986-01-21 | Molten metal discharge device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62168660A true JPS62168660A (en) | 1987-07-24 |
| JPH0665432B2 JPH0665432B2 (en) | 1994-08-24 |
Family
ID=11705133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP888586A Expired - Lifetime JPH0665432B2 (en) | 1986-01-21 | 1986-01-21 | Molten metal discharge device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0665432B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03165959A (en) * | 1989-11-22 | 1991-07-17 | Toshiba Ceramics Co Ltd | Plate for sliding gate |
| JP2014133241A (en) * | 2013-01-09 | 2014-07-24 | Tokyo Yogyo Co Ltd | Long nozzle for continuous casting |
-
1986
- 1986-01-21 JP JP888586A patent/JPH0665432B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03165959A (en) * | 1989-11-22 | 1991-07-17 | Toshiba Ceramics Co Ltd | Plate for sliding gate |
| JP2014133241A (en) * | 2013-01-09 | 2014-07-24 | Tokyo Yogyo Co Ltd | Long nozzle for continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0665432B2 (en) | 1994-08-24 |
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