JP3134018B2 - Nozzle hole filler for molten metal flow controller - Google Patents
Nozzle hole filler for molten metal flow controllerInfo
- Publication number
- JP3134018B2 JP3134018B2 JP04226080A JP22608092A JP3134018B2 JP 3134018 B2 JP3134018 B2 JP 3134018B2 JP 04226080 A JP04226080 A JP 04226080A JP 22608092 A JP22608092 A JP 22608092A JP 3134018 B2 JP3134018 B2 JP 3134018B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle hole
- nozzle
- molten metal
- weight
- filler
- 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 - Lifetime
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、取鍋、タンディッシ
ュなどに設置される溶融金属の流量制御装置のノズル孔
に充填する、ノズル孔充填材に関する。特に、孔の径が
比較的小さいノズル孔に好適なノズル孔充填材に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle hole filling material for filling a nozzle hole of a molten metal flow control device installed in a ladle, a tundish, or the like. In particular, the present invention relates to a nozzle hole filler suitable for a nozzle hole having a relatively small hole diameter.
【０００２】[0002]
【従来の技術】取鍋、タンディッシュなどに設置される
溶融金属流量制御装置、例えばスライディングノズル装
置は、上部ノズル、固定盤、摺動盤、下部ノズルなどの
主たる部材からなり、摺動盤の開閉で溶融金属の流出調
整、または停止を行うものとして広く使用されている。2. Description of the Related Art A molten metal flow control device, such as a sliding nozzle device, installed in a ladle, a tundish, or the like, comprises main members such as an upper nozzle, a fixed plate, a sliding plate, and a lower nozzle. It is widely used to control or stop the flow of molten metal by opening and closing.
【０００３】しかしながら、こうしたスライディングノ
ズル装置を取り付けた溶鋼容器に直接溶融金属を注入し
ても、溶鋼がノズル孔の中で凝固してノズル孔を閉塞
し、スライディングノズル装置の摺動盤を移動してノズ
ル孔を開口しても、これから溶融金属をスム−スに流出
させることは出来なかった。溶鋼容器に溶融金属を注入
する際は、あらかじめ容器内を予熱しているが、それで
もノズル孔付近の温度を十分に上げることが出来ないた
めに、注入された溶融金属は、その温度より低い上部ノ
ズルおよび固定盤のノズル孔に流入して冷却固化する。
従って、その後、摺動盤を摺動してノズル孔を開口して
も溶融金属が流出できなかった。このため従来から、溶
鋼容器に溶融金属を注入する先立ち、スライディングノ
ズルの上部ノズルおよび固定盤のノズル孔に、予め各種
のノズル孔充填材を充填し、溶融金属の注入時に、溶融
金属がノズル孔内に侵入するのを防ぐとともに、ノズル
の開口時にこの充填材が溶融金属とともに落下してノズ
ル孔を開口することが広く行なわれている。そして、そ
の充填材についても種々の提案がなされている。However, even when molten metal is directly injected into a molten steel container equipped with such a sliding nozzle device, the molten steel solidifies in the nozzle hole, closes the nozzle hole, and moves the sliding plate of the sliding nozzle device. Even if the nozzle hole was opened, the molten metal could not flow out smoothly from this. When pouring the molten metal into the molten steel container, the inside of the container is preheated in advance, but the temperature near the nozzle hole cannot be raised sufficiently, so the injected molten metal is It flows into the nozzle holes of the nozzle and the fixed plate and solidifies by cooling.
Therefore, the molten metal could not flow out even if the nozzle hole was opened by sliding the sliding plate thereafter. For this reason, prior to injecting molten metal into a molten steel container, various types of nozzle hole fillers have been filled in advance in the upper nozzle of the sliding nozzle and the nozzle holes of the fixed platen, and the molten metal is injected into the nozzle hole when the molten metal is injected. It is widely practiced to prevent the filler material from entering the inside of the nozzle and drop the filler together with the molten metal when the nozzle is opened to open the nozzle hole. Various proposals have been made for the filler.
【０００４】例えば、特公昭５２−１６９５号には、ク
ロム鉱石の粒子の周面を鱗片状黒鉛で被覆したもの、ま
た特公昭６０−５７９４２号には、クロム鉱石の粒子と
けい砂で二段階層にしたノズル孔の充填材が開示されて
おり、それぞれ効果を上げている。[0004] For example, Japanese Patent Publication No. 52-1695 discloses a chromium ore particle in which the peripheral surface is coated with flaky graphite, and Japanese Patent Publication No. 60-57942 discloses a two-stage layer of chromium ore particle and silica sand. The disclosed fillers for the nozzle holes are described above, and each has improved effects.
【０００５】しかしながら、ノズル孔の開口は、鋼種と
ともに、溶鋼容器の大きさ、流量制御装置のノズル孔の
径などの個々によっても微妙に変化し、ここに用いる充
填材もこれらに応じて使用する必要があった。例えば、
鋼種を同一としても、溶鋼容器の大きさ、ノズル孔の径
により、ノズル孔に充填し充填物に加えられる溶鋼のヘ
ッド圧が異なり、ノズル孔の開口が出来ない場合が生じ
ていた。However, the opening of the nozzle hole slightly varies depending on the type of steel, the size of the molten steel container, the diameter of the nozzle hole of the flow control device, and the like, as well as the type of steel, and the filler used here is also used accordingly. Needed. For example,
Even if the steel type is the same, the head pressure of the molten steel filled in the nozzle hole and applied to the filler differs depending on the size of the molten steel container and the diameter of the nozzle hole, so that the nozzle hole cannot be opened in some cases.
【０００６】従来は、主に容器の大型化に対応し、また
ノズル孔の径についても大きなものに対応した充填材の
開発が各種なされてきた。反対に、ノズル孔の径が、例
えば２５〜４０mmといった小さい場合のノズル孔の充填
材については、従来から提案がなされたことはなかっ
た。最近、生産性の向上を必要とすることから、ノズル
孔の径の小さいノズル孔の充填材の必要性も生じてき
た。しかし、ここに従来のＳｉＯ2 主体の充填材を用い
ると開口率が７０〜８０％と低く、孔径が比較的小さい
ノズル孔においても、満足すべき開口率が得られるよう
なノズル孔充填材が要請されていた。Hitherto, various developments have been made for fillers mainly corresponding to the increase in the size of the container and to the nozzle having a large diameter. Conversely, no filler has been proposed for the nozzle hole when the diameter of the nozzle hole is as small as 25 to 40 mm, for example. In recent years, since it is necessary to improve productivity, a need has arisen for a filler for a nozzle hole having a small diameter. However, when a conventional SiO 2 -based filler is used here, a nozzle hole filler that has a low opening ratio of 70 to 80% and can provide a satisfactory opening ratio even in a nozzle hole having a relatively small hole diameter is obtained. Had been requested.
【０００７】[0007]
【発明が解決しようとしている課題】この発明は、取鍋
などの溶鋼容器の下部に取付けられる溶鋼の流量制御装
置のノズル孔が比較的小さいノズル孔に好適なノズル孔
充填材を得ようとするものである。SUMMARY OF THE INVENTION An object of the present invention is to obtain a nozzle hole filling material suitable for a nozzle hole having a relatively small nozzle hole of a molten steel flow control device attached to a lower portion of a molten steel container such as a ladle. Things.
【０００８】[0008]
【課題を解決するための手段】この発明は、クロム鉱石
の７５〜８９重量％と、けい砂またはけい石の１０〜２
０重量％と、黒鉛の１〜５重量％との混合物からなる溶
融金属流量制御装置用ノズル孔充填材（請求項１）およ
びＳｉＯ2 が２０〜３０重量％、Ａｌ2 Ｏ3 が９．６〜
１４．４重量％、Ｆｅ2 Ｏ3 が１２．８〜１９．２重量
％、ＭｇＯが８．８〜１３．２重量％、Ｃｒ2 Ｏ3 が２
７．２〜３４．８重量％、Ｃが１．６〜２．４重量％の
化学組成である請求項１記載の溶融金属流量制御装置用
ノズル孔充填材（請求項２）である。According to the present invention, 75 to 89% by weight of chromium ore and 10 to 2% of silica sand or silica stone are used.
A nozzle hole filler for a molten metal flow control device, comprising a mixture of 0% by weight and 1 to 5% by weight of graphite (claim 1);
Fine SiO 2 20 to 30 wt%, Al 2 O 3 is 9.6～
14.4 wt%, Fe 2 O 3 is from 12.8 to 19.2 wt%, MgO is 8.8 to 13.2 wt%, Cr 2 O 3 is 2
The nozzle hole filler for a molten metal flow control device according to claim 1, wherein the chemical composition has 7.2 to 34.8% by weight and C is 1.6 to 2.4% by weight (Claim 2) .
【０００９】この発明のノズル孔充填材は、クロム鉱石
と、けい砂またはけい石と、黒鉛との混合物からなる。
これらの配合比は、クロム鉱石が７５〜８９重量％、け
い砂またはけい石は１０〜２０重量％、黒鉛は１〜５重
量％である。The nozzle hole filler of the present invention comprises a mixture of chromium ore, silica sand or silica, and graphite.
The mixing ratio of these components is 75 to 89% by weight of chromium ore, 10 to 20% by weight of silica sand or silica, and 1 to 5% by weight of graphite.
【００１０】クロム鉱石は、ノズル孔の径、鋼種などに
より異なるが、７５〜８９重量％の範囲で好ましい結果
を得ることが出来る。これが７５重量％未満では、充填
材全体の自重が不足してノズル孔を開口出来なくなる恐
れがある。また、これが８９重量％を超えると開口に作
用する他の成分であるけい砂や黒鉛が減少し、これがた
めに開口ができなくなる恐れがある。The chromium ore varies depending on the diameter of the nozzle hole, the type of steel, and the like, but preferable results can be obtained in the range of 75 to 89% by weight. If the content is less than 75% by weight, there is a possibility that the weight of the entire filler is insufficient and the nozzle hole cannot be opened. On the other hand, when the content exceeds 89% by weight, silica sand and graphite, which are other components acting on the openings, are reduced, so that the openings may not be formed.
【００１１】クロム鉱石は、溶融温度が２０００℃以上
と高いために、クロム鉱石単独を使用したのでは、クロ
ム鉱石の粒子間にガラス状の接着、反応層が出来ない。
そのため、その間隙に溶融金属が深く浸透しこれが凝固
して、スライディングノズル装置の摺動盤を開口して
も、ノズル孔を開口できない。従って、これを解消する
ため、これに１０〜２０重量％の範囲でけい砂またはけ
い石を混合し、クロム鉱石の粒子間に適度のガラス状の
反応層が形成されるようにする。ここに用いるけい砂ま
たはけい石が１０重量％未満では必要な反応層が形成さ
れず、またこれが２０重量％を超えると反応層が多すぎ
て強固な凝固層が形成され、かえってノズル孔の開口を
不能にする恐れがる。また、けい砂やけい石の量が多す
ぎるとそれに伴ってクロム鉱石の量が少なくなり、ノズ
ル孔の充填材の自重が軽くなり、そのために十分な開口
が出来ない。Since the melting temperature of chromium ore is as high as 2000 ° C. or more, if chromium ore is used alone, a glassy adhesion or reaction layer cannot be formed between chromium ore particles.
Therefore, even if the molten metal deeply penetrates into the gap and solidifies, the nozzle hole cannot be opened even when the sliding plate of the sliding nozzle device is opened. Therefore, in order to solve this problem, silica sand or silica is mixed with the chromium ore in the range of 10 to 20% by weight so that an appropriate glassy reaction layer is formed between the particles of chromium ore. If the silica sand or silica used here is less than 10% by weight, a necessary reaction layer is not formed, and if it exceeds 20% by weight, the reaction layer is too large to form a strong solidified layer. May be disabled. On the other hand, if the amount of silica sand or silica stone is too large, the amount of chromium ore decreases accordingly, and the weight of the filler in the nozzle hole becomes lighter, so that a sufficient opening cannot be made.
【００１２】黒鉛は、ノズル孔を開口して溶融金属を流
出するとき、クロム鉱石粒の滑りをよくするために必要
で、１〜５重量％の範囲で使用する。これが１重量％よ
り少ないと、クロム鉱石粒の滑りが悪くノズルの閉塞を
生じやすい。また、これが５重量％より多いと、クロム
鉱石間のガラス状反応層が少なくなって溶融金属がクロ
ム鉱石間に浸透して凝固し、ノズル孔を開口することが
出来なくなる。[0012] Graphite is required to improve the slip of chromium ore particles when the molten metal flows out by opening the nozzle hole, and is used in the range of 1 to 5% by weight. If the amount is less than 1% by weight, the chromium ore grains are not easily slid and the nozzles are easily blocked. On the other hand, if the content is more than 5% by weight, the glassy reaction layer between the chromium ores decreases, and the molten metal penetrates between the chromium ores and solidifies, so that it is impossible to open the nozzle hole.
【００１３】[0013]
【００１４】[0014]
【００１５】本発明のノズル孔充填材の好ましい化学成
分では、ＳｉＯ2 が２０〜３０重量％、Ａｌ2 Ｏ3 が
９．６〜１４．４重量％、Ｆｅ2 Ｏ3 が１２．８〜１
９．２重量％、ＭｇＯが８．８〜１３．２重量％、Ｃｒ
2 Ｏ3 が２７．２〜３４．８重量％、Ｃが１．６〜２．
４重量％である。 Preferred Chemical Composition of the Nozzle Hole Filler of the Invention
The min, SiO 2 20 to 30 wt%, Al 2 O 3 is 9.6 to 14.4 wt%, Fe 2 O 3 is 12.8 to 1
9.2% by weight, 8.8 to 13.2% by weight of MgO, Cr
2 O 3 is from 27.2 to 34.8 wt%, C is from 1.6 to 2.
4% by weight.
【００１６】[0016]
【作用】この発明は、ノズル孔充填材として、クロム鉱
石とけい砂またはけい石と黒鉛を所定の配合比で用いる
ことにより、溶融温度の極端に高いクロム鉱石の間隙に
ガラス状のけい砂またはけい石のガラス状の接着層を介
在させてこれらを接合するようにしたもので、ここに溶
融金属が浸透するのを防止するとともに、ノズル孔を開
口したときには、上記の接着層が容易に破断してここか
ら溶融金属がスム−スに流出するようにしたものであ
る。According to the present invention, by using chromium ore and silica sand or silica and graphite in a predetermined mixing ratio as a nozzle hole filler, glass-like silica sand or silica is filled in a gap between chromium ores having an extremely high melting temperature. These are joined with a glass-like adhesive layer of stone interposed between them, to prevent molten metal from penetrating here, and when the nozzle hole is opened, the above-mentioned adhesive layer is easily broken. Thus, the molten metal flows out smoothly from here.
【００１７】[0017]
【実施例】粒径が３〜２mmのクロム鉱石の８２重量％
と、粒径が２〜１mmのけい砂の１５重量％と、粒径０．
５mm以下の鱗状黒鉛の３重量％とを混合してノズル孔充
填材を得た。この混合物の耐火度をJIS 2204に基づいて
測定したところＳＫ３３であった。また、この化学組成
は表１の通りである。EXAMPLE 82% by weight of chromium ore having a particle size of 3 to 2 mm
And 15% by weight of silica sand having a particle size of 2-1 mm, and a particle size of 0. 1%.
The mixture was mixed with 3% by weight of scale graphite of 5 mm or less to obtain a nozzle hole filler. When the fire resistance of this mixture was measured based on JIS 2204, it was SK33. The chemical composition is as shown in Table 1.
【００１８】[0018]
【表１】 [Table 1]
【００１９】このノズル孔充填材を用いて図１に示すス
ライディングノズル装置のノズル孔に充填した。図１
は、取鍋１の底部のノズル受け部２に設置した上部ノズ
ル３と、この上部ノズル３の下方に順次設けた固定盤
４、摺動盤５、下部ノズル６とからなるスライディング
ノズル装置７の上部ノズル３および固定盤４のノズル孔
８内に、予め上記のノズル孔充填材９を充填したもので
ある。なお、ノズル孔の内径は２５〜４０mmである。This nozzle hole filler was used to fill the nozzle holes of the sliding nozzle device shown in FIG. FIG.
Is a sliding nozzle device 7 composed of an upper nozzle 3 installed in a nozzle receiving portion 2 at the bottom of a ladle 1, and a fixed plate 4, a sliding plate 5, and a lower nozzle 6 sequentially provided below the upper nozzle 3. The nozzle holes 8 of the upper nozzle 3 and the fixed platen 4 are filled with the nozzle hole filler 9 in advance. The inner diameter of the nozzle hole is 25 to 40 mm.
【００２０】この取鍋１内を予め加温した後、１６５０
℃の溶融金属を３０〜１５０トン注入し、溶融金属を３
０〜６０分間滞留させた後、摺動盤５を摺動してノズル
孔８を開口した。この場合のノズル孔の開口率を測定し
たところ、表２の通りであった。同表には比較例も同時
に示した。比較例は従来のＳｉＯ2 を主体にした詰物を
用いた。After the inside of the ladle 1 has been heated in advance, 1650
30 to 150 tons of molten metal at
After staying for 0 to 60 minutes, the sliding plate 5 was slid to open the nozzle hole 8. Table 2 shows the results obtained by measuring the aperture ratio of the nozzle holes in this case. The table also shows comparative examples. The comparative example used a conventional filling mainly composed of SiO 2 .
【００２１】[0021]
【表２】 [Table 2]
【００２２】表２に示されるように、本発明のノズル孔
充填材は、ノズル孔の内径が２５〜４０mmと小さくとも
ノズル孔内で充填材が凝固せず摺動盤を摺動してノズル
孔を開口すると、速やかに溶融金属の加圧力でノズル孔
から押し出され、溶融金属を流出することが出来た。As shown in Table 2, the nozzle hole filler of the present invention slides on the sliding plate without slidingly coagulating in the nozzle hole even if the inside diameter of the nozzle hole is as small as 25 to 40 mm. When the hole was opened, it was quickly pushed out of the nozzle hole by the pressure of the molten metal, and the molten metal was able to flow out.
【００２３】本発明のノズル孔充填材を適用できる溶融
金属流量制御装置は、上記の如くスライディングノズル
装置に限定されるものではなく、ロ−タリ−ノズル方
式、その他のものでもよいことは勿論である。The molten metal flow rate control device to which the nozzle hole filler of the present invention can be applied is not limited to the sliding nozzle device as described above, but may be a rotary nozzle type or any other type. is there.
【００２４】[0024]
【発明の効果】本発明のノズル孔充填材によれば、溶融
金属流量制御装置のノズル孔が比較的小さい場合でも、
充填材がノズル孔内で凝固してこれを閉塞することもな
く、ノズル孔の開口にともなって溶融金属をスム−スに
流出させることが出来る。According to the nozzle hole filling material of the present invention, even if the nozzle hole of the molten metal flow control device is relatively small,
The molten metal can flow out smoothly with the opening of the nozzle hole without the filler solidifying in the nozzle hole and closing it.
【図１】この発明のノズル孔充填材を用いてスライディ
ングノズル装置のノズル孔に充填した状態を示した説明
図。FIG. 1 is an explanatory diagram showing a state in which a nozzle hole of a sliding nozzle device is filled with a nozzle hole filler of the present invention.
１…取鍋、２…ノズル受け部、３…上部ノズル、４…固
定盤、５…摺動盤、６…下部ノズル、７…スライディン
グノズル装置、８…ノズル孔８、９…ノズル孔充填材。DESCRIPTION OF SYMBOLS 1 ... Ladle, 2 ... Nozzle receiving part, 3 ... Upper nozzle, 4 ... Fixed plate, 5 ... Sliding plate, 6 ... Lower nozzle, 7 ... Sliding nozzle device, 8 ... Nozzle hole 8, 9 ... Nozzle hole filler .
フロントページの続き (56)参考文献 特開 昭49−122825（ＪＰ，Ａ) 特開 昭52−147523（ＪＰ，Ａ) 特公 昭52−1695（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B22D 41/46 B22D 11/10 340 C04B 35/12 Continuation of the front page (56) References JP-A-49-122825 (JP, A) JP-A-52-147523 (JP, A) JP-B-52-1695 (JP, B2) (58) Fields investigated (Int) .Cl. 7 , DB name) B22D 41/46 B22D 11/10 340 C04B 35/12
Claims (2)
砂またはけい石の１０〜２０重量％と、黒鉛の１〜５重
量％との混合物からなる溶融金属流量制御装置用ノズル
孔充填材。1. A nozzle hole filling material for a molten metal flow control device, comprising a mixture of 75 to 89% by weight of chromium ore, 10 to 20% by weight of silica sand or silica, and 1 to 5% by weight of graphite. .
3 が９．６〜１４．４重量％、Ｆｅ2 Ｏ3 が１２．８〜
１９．２重量％、ＭｇＯが８．８〜１３．２重量％、Ｃ
ｒ2 Ｏ3 が２７．２〜３４．８重量％、Ｃが１．６〜
２．４重量％の化学組成である請求項１記載の溶融金属
流量制御装置用ノズル孔充填材。Wherein SiO 2 is 20 to 30 wt%, Al 2 O
3 is 9.6 to 14.4% by weight, Fe 2 O 3 is 12.8 to
19.2% by weight, 8.8 to 13.2% by weight of MgO, C
r 2 O 3 is from 27.2 to 34.8 wt%, C is 1.6
2. The nozzle hole filler for a molten metal flow control device according to claim 1, which has a chemical composition of 2.4% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04226080A JP3134018B2 (en) | 1992-08-25 | 1992-08-25 | Nozzle hole filler for molten metal flow controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04226080A JP3134018B2 (en) | 1992-08-25 | 1992-08-25 | Nozzle hole filler for molten metal flow controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0671424A JPH0671424A (en) | 1994-03-15 |
| JP3134018B2 true JP3134018B2 (en) | 2001-02-13 |
Family
ID=16839512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04226080A Expired - Lifetime JP3134018B2 (en) | 1992-08-25 | 1992-08-25 | Nozzle hole filler for molten metal flow controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3134018B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69609334T2 (en) * | 1995-08-09 | 2000-11-30 | Nippon Rotary Nozzle Co., Ltd. | SLIDE CAP FILLER |
| EP1201336A4 (en) * | 1999-05-27 | 2004-08-18 | Jfe Steel Corp | Padding sand for sliding opening/closing unit of ladle |
| KR100460256B1 (en) * | 2001-10-31 | 2004-12-04 | 주식회사 인텍 | Silica refractory composition for filler |
| JP2005088022A (en) * | 2003-09-12 | 2005-04-07 | Yamakawa Sangyo Kk | Plugging-material for slidable opening/closing device of ladle |
| CN101972847B (en) * | 2010-09-21 | 2012-11-21 | 上海盛江特种耐火材料有限公司 | Chrome drainage sand for special steel and preparation technology thereof |
| CN102114534B (en) * | 2011-03-15 | 2013-03-06 | 武汉科技大学 | Chromium-containing diversion sands for steel ladle and preparation method thereof |
| KR101645627B1 (en) | 2015-07-20 | 2016-08-08 | 주식회사 인텍 | Method for preparing steel ladle filler and steel ladle filler prepared using same |
| CN108421970B (en) * | 2018-03-19 | 2020-05-22 | 河南通宇冶材集团有限公司 | Preparation method of granular chromium drainage sand |
-
1992
- 1992-08-25 JP JP04226080A patent/JP3134018B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0671424A (en) | 1994-03-15 |
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