JPS633727Y2 - - Google Patents
Info
- Publication number
- JPS633727Y2 JPS633727Y2 JP1982059771U JP5977182U JPS633727Y2 JP S633727 Y2 JPS633727 Y2 JP S633727Y2 JP 1982059771 U JP1982059771 U JP 1982059771U JP 5977182 U JP5977182 U JP 5977182U JP S633727 Y2 JPS633727 Y2 JP S633727Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molten metal
- weir
- refractory material
- rollers
- 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
- 239000002184 metal Substances 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 239000011819 refractory material Substances 0.000 claims description 22
- 239000011261 inert gas Substances 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims 2
- 239000010409 thin film Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Description
【考案の詳細な説明】
本考案は、互いに接近させられたツインモール
ドローラと、該ツインモールドローラ上に配設さ
れた堰とで鋳型を形成し、該鋳型内に溶湯を注入
してツインモールドローラ間から鋳片を引き抜く
ようにした鋳片連続鋳造設備におけるツインモー
ルドローラ用堰の構造に関する。[Detailed description of the invention] The present invention forms a mold with twin mold rollers brought close to each other and a weir placed on the twin mold rollers, and injects molten metal into the mold to form a twin mold. The present invention relates to the structure of a weir for twin mold rollers in continuous slab casting equipment in which slabs are pulled out from between the rollers.
従来知られているツインモールドローラを用い
た鋳片連続鋳造設備の概略を第１図に基づいて説
明する。１は互いに接近させられたツインモール
ドローラ、２，３は両ローラ１の直下から下方へ
のびる鋳片搬送経路を構成するピンチローラおよ
びガイドローラ、４はタンデイツシユノズルであ
る。 An outline of a conventional continuous slab casting equipment using twin mold rollers will be explained based on FIG. 1. Reference numeral 1 designates twin mold rollers that are brought close to each other; reference numerals 2 and 3 designate a pinch roller and guide roller that extend downward from directly below both rollers 1 and constitute a slab conveyance path; and reference numeral 4 designates a tundish nozzle.
上記構成において、両ローラ１間にノズル４か
ら溶湯５を注入し、両ローラ１を矢印Ａ方向へ回
転させて鋳片６を引き抜くわけであるが、両ロー
ラ１だけでは湯溜りの湯面高さH1が限定され、
溶湯５に含まれる不純物が湯面に浮上するのに十
分な時間が与えられず、良質の鋳片６を得にくい
ものである。そこで両ローラ１上に堰７を設けて
湯面高さH2を十分にとることが考えられている
が、ここで問題となるのが溶湯５によつて堰７が
侵食され、堰７を比較的短期間で取換えなければ
ならないということである。 In the above configuration, the molten metal 5 is injected from the nozzle 4 between both rollers 1, and both rollers 1 are rotated in the direction of arrow A to pull out the slab 6. H 1 is limited,
Sufficient time is not given for impurities contained in the molten metal 5 to rise to the surface of the molten metal, making it difficult to obtain a slab 6 of good quality. Therefore, it has been considered to provide a weir 7 above both rollers 1 to ensure a sufficient hot water level H2 , but the problem here is that the weir 7 is eroded by the molten metal 5, and the weir 7 is This means that they must be replaced within a relatively short period of time.
そこで本考案はかかる問題点を解消したツイン
モールドローラ用堰の構造を提供するものであつ
て、その特徴とするところは、堰の少なくとも溶
湯対向部分をポーラスな材質からなる耐火材で形
成すると共に、この耐火材の外側に密閉室を形成
し、これら耐火材および密閉室を仕切板により上
下複数に分割し、各分割密閉室に、不活性ガスを
供給する圧送ポンプからの分岐管を連通すると共
に、これら分岐管中にバルブを設けている。 Therefore, the present invention provides a structure of a weir for twin mold rollers that solves these problems, and its features are that at least the part of the weir facing the molten metal is made of a fireproof material made of a porous material; A sealed chamber is formed outside this refractory material, and these refractory materials and the sealed chamber are divided into upper and lower parts by partition plates, and a branch pipe from a pressure pump supplying inert gas is connected to each divided sealed chamber. At the same time, valves are provided in these branch pipes.
この構成によれば、堰と溶湯との間に不活性ガ
スによる薄膜が形成され、堰の溶湯対向部分が保
護される。またバルブの開動を下ほど大きくする
ことによつて、耐火材を通つて鋳型内に吹き出さ
れる不活性ガスの圧力を下方へいくほど大きくし
得る。 According to this configuration, a thin film of inert gas is formed between the weir and the molten metal, and the portion of the weir facing the molten metal is protected. Further, by increasing the opening movement of the valve downward, the pressure of the inert gas blown into the mold through the refractory material can be increased downward.
以下、本考案の一実施例を第２図および第３図
に基づいて説明する。すなわち堰７の溶湯対向箇
所からローラ対向箇所にかけての部分を見掛気孔
率15〜35％のポーラスな材質からなる耐火材８で
形成し、堰７の耐火材８を除く部分を鉄皮で強度
上補強された耐火レンガ９により構成してある。
上記耐火材８としてはAl2O3系またはAI2O3−
SiO2系などが適当であり、気孔率が15％以下で
は気孔性の点で効果がなくなり、35％以上では気
孔が荒くなりすぎるため耐火材８としての強度が
不足し、また吹き込まれる不活性ガスが団塊状に
耐火材表面から吹き出されるため実用に供せな
い。１０は耐火材８と耐火レンガ９との間の密閉
室１１内に配管１２を介してアルゴンガスなどの
不活性ガスを供給するための圧送ポンプである。
前記耐火材８および密閉室１１は、上下方向に沿
つて適当間隔ごとに仕切板１５により複数（この
実施例では３つ）に分割して複数の分割密閉室と
分割耐火材とを形成してあり、配管１２から分岐
させた分岐管１２Ａ，１２Ｂ，１２Ｃをそれぞれ
上記各分割密閉室に連通させてある。１６，１
７，１８は各分岐管１２Ａ，１２Ｂ，１２Ｃに介
装された開閉バルブである。 An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In other words, the part of the weir 7 from the part facing the molten metal to the part facing the roller is made of a refractory material 8 made of a porous material with an apparent porosity of 15 to 35%, and the part of the weir 7 other than the refractory material 8 is made of iron skin for strength. It is constructed of top-reinforced firebrick 9.
The refractory material 8 is Al 2 O 3 type or AI 2 O 3 −
SiO2- based materials are suitable; if the porosity is less than 15%, it will be ineffective in terms of porosity, and if it is more than 35%, the pores will become too rough, resulting in insufficient strength as a refractory material 8. It cannot be put to practical use because the gas blows out from the surface of the refractory material in the form of nodules. Reference numeral 10 denotes a pressure pump for supplying an inert gas such as argon gas into the sealed chamber 11 between the refractory material 8 and the refractory bricks 9 via a pipe 12.
The refractory material 8 and the sealed chamber 11 are divided into a plurality (three in this embodiment) by partition plates 15 at appropriate intervals along the vertical direction to form a plurality of divided sealed chambers and divided refractory materials. Branch pipes 12A, 12B, and 12C branched from the pipe 12 are communicated with each of the divided sealed chambers. 16,1
Reference numerals 7 and 18 indicate on-off valves installed in each branch pipe 12A, 12B, and 12C.
上記構成において、ローラ１と堰７とで形成さ
れた鋳型１３内にノズル４から溶湯５を注入し、
ツインモールドローラ１を矢印Ａ方向へ回転させ
ると、シエル１４が形成され、ツインモールドロ
ーラ１間から鋳片６が引き抜かれていく。そして
このとき、ポンプ１０から密閉室１１内に不活性
ガスが圧入され、その不活性ガスは耐火材８の気
孔を通して鋳型１３内に吹き出される。これによ
つて耐火材８と溶湯５との間に不活性ガスの薄膜
イが形成され、耐火材８を保護している。また鋳
型１３内に吹き出された不活性ガスの一部は溶湯
５内に入つて浮上し、これによつて溶湯５を撹拌
して溶湯温度を均一化させるものである。さらに
密閉室１１内の不活性ガスは耐火材８の気孔を通
つてこの耐火材８とローラ１との間の0.1mm以下
の間隔α内に供給され、この間隔α内が不活性ガ
スで充満され、いわゆる静圧軸受となり、この静
圧軸受の圧力P1を溶湯５のヘツド圧P2と同等に
することによつて、溶湯５が間隙α内に侵入する
のを防止している。このとき、バルブ１６，１
７，１８の開度を下ほど大きくしている。これに
よつて下段分割密閉室内に圧入される不活性ガス
の量が一番多くなり、中段分割密閉室内に圧入さ
れる不活性ガスの量がその次に多くなる。したが
つて鋳型１３内に吹き出される不活性ガスの圧力
は下方へいくほど大きくなり、溶湯５の下方へい
くほど大きくなるヘツド圧に対向することにな
り、耐火材８の溶湯対向面の全面にわたつて不活
性ガスによる薄膜イを確実にほぼ均一に形成さ
れ、堰を保護することになる。 In the above configuration, the molten metal 5 is injected from the nozzle 4 into the mold 13 formed by the roller 1 and the weir 7,
When the twin mold rollers 1 are rotated in the direction of arrow A, a shell 14 is formed and the slab 6 is pulled out from between the twin mold rollers 1. At this time, an inert gas is pressurized into the sealed chamber 11 from the pump 10, and the inert gas is blown out into the mold 13 through the pores of the refractory material 8. As a result, a thin film of inert gas is formed between the refractory material 8 and the molten metal 5 to protect the refractory material 8. Further, a part of the inert gas blown into the mold 13 enters the molten metal 5 and floats up, thereby stirring the molten metal 5 and making the temperature of the molten metal uniform. Further, the inert gas in the sealed chamber 11 is supplied through the pores of the refractory material 8 into a space α of 0.1 mm or less between the refractory material 8 and the roller 1, and this space α is filled with inert gas. By making the pressure P 1 of the static pressure bearing equal to the head pressure P 2 of the molten metal 5, the molten metal 5 is prevented from entering the gap α. At this time, the valve 16,1
The opening degree of 7 and 18 is increased towards the bottom. As a result, the amount of inert gas pressurized into the lower divided hermetic chamber becomes the largest, and the amount of inert gas pressurized into the middle divided hermetic chamber becomes the second largest. Therefore, the pressure of the inert gas blown into the mold 13 increases as it goes downward, and it faces the head pressure that increases as it goes downward, and the entire surface of the refractory material 8 facing the molten metal is This ensures that a thin film of inert gas is formed almost uniformly over the area to protect the weir.
以上述べたごとく本考案の鋳片連続鋳造設備に
おけるツインモールドローラ用堰の構造によれ
ば、堰と溶湯との間に不活性ガスによる薄膜が形
成され、堰の溶湯対向部分が保護されるから、溶
湯による堰の侵食を抑制でき、堰の寿命を長く保
護することができるものである。また鋳型内に吹
き出された不活性ガスの一部は溶湯内に入つて浮
上し、これによつて溶湯を撹拌して溶湯温度を均
一化させるものである。さらに溶湯が不活性ガス
の薄膜によつて覆われるので酸化防止を図ること
ができるものである。特に本考案によると、耐火
材を通つて鋳型内に吹き出される不活性ガスの圧
力を下方へいくほど大きくすることができ、溶湯
の下方へいくほど大きくなるヘツド圧に対向させ
ることができて、前述した薄膜を確実にほぼ均一
な厚さに形成することができる。 As described above, according to the structure of the weir for twin mold rollers in the continuous slab casting equipment of the present invention, a thin film of inert gas is formed between the weir and the molten metal, and the part of the weir facing the molten metal is protected. , it is possible to suppress erosion of the weir by molten metal, and to prolong the life of the weir. Further, a part of the inert gas blown into the mold enters the molten metal and floats to the surface, thereby stirring the molten metal and making the temperature of the molten metal uniform. Furthermore, since the molten metal is covered with a thin film of inert gas, oxidation can be prevented. In particular, according to the present invention, the pressure of the inert gas blown into the mold through the refractory material can be increased as it goes downward, and it can be made to oppose the head pressure that increases as it goes down the molten metal. , the aforementioned thin film can be reliably formed to have a substantially uniform thickness.
第１図はツインモールドローラを用いた鋳片連
続鋳造設備の概略説明図、第２図および第３図は
本考案の一実施例を示し、第２図は概略縦断面
図、第３図は要部の拡大縦断面図である。
１……ツインモールドローラ、５……溶湯、６
……鋳片、７……堰、８……耐火材、１０……圧
送ポンプ、１１……密閉室、１２Ａ，１２Ｂ，１
２Ｃ……分岐管、１３……鋳型、１５……仕切
板、１６Ａ，１６Ｂ，１６Ｃ……開閉バルブ、イ
……薄膜。
Fig. 1 is a schematic explanatory diagram of continuous slab casting equipment using twin mold rollers, Figs. 2 and 3 show an embodiment of the present invention, Fig. 2 is a schematic longitudinal sectional view, and Fig. 3 is FIG. 3 is an enlarged vertical cross-sectional view of main parts. 1... Twin mold roller, 5... Molten metal, 6
... Slab, 7 ... Weir, 8 ... Refractory material, 10 ... Pressure pump, 11 ... Sealed chamber, 12A, 12B, 1
2C... Branch pipe, 13... Mold, 15... Partition plate, 16A, 16B, 16C... Opening/closing valve, A... Thin film.
Claims (1)
と、該ツインモールドローラ上に配設された堰と
で鋳型を形成し、該鋳型内に溶湯を注入してツイ
ンモールドローラ間から鋳片を引き抜くようにし
た鋳片連続鋳造設備において、上記堰の少なくと
も溶湯対向部分をポーラスな材質からなる耐火材
で形成すると共に、この耐火材の外側に密閉室を
形成し、これら耐火材および密閉室を仕切板によ
り上下複数に分割し、各分割密閉室に、不活性ガ
スを供給する圧送ポンプからの分岐管を連通する
と共に、これら分岐管中にバルブを設けたことを
特徴とする鋳片連続鋳造設備におけるツインモー
ルドローラ用堰の構造。 A casting mold in which a mold is formed by twin mold rollers brought close to each other and a weir disposed on the twin mold rollers, and molten metal is poured into the mold and a slab is pulled out from between the twin mold rollers. In the single continuous casting equipment, at least the part of the weir facing the molten metal is formed of a refractory material made of a porous material, and a sealed chamber is formed on the outside of this refractory material, and the refractory material and the sealed chamber are separated into multiple upper and lower sections by partition plates. Twin mold rollers in continuous casting equipment for cast slabs, characterized in that branch pipes from a pressure pump supplying inert gas are connected to each divided sealed chamber, and valves are provided in these branch pipes. Structure of the weir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5977182U JPS58160654U (en) | 1982-04-23 | 1982-04-23 | Structure of twin mold roller weir in continuous slab casting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5977182U JPS58160654U (en) | 1982-04-23 | 1982-04-23 | Structure of twin mold roller weir in continuous slab casting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58160654U JPS58160654U (en) | 1983-10-26 |
| JPS633727Y2 true JPS633727Y2 (en) | 1988-01-29 |
Family
ID=30070053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5977182U Granted JPS58160654U (en) | 1982-04-23 | 1982-04-23 | Structure of twin mold roller weir in continuous slab casting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58160654U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57130743A (en) * | 1981-02-06 | 1982-08-13 | Mitsubishi Heavy Ind Ltd | Method and device for direct rolling type continuous casting |
-
1982
- 1982-04-23 JP JP5977182U patent/JPS58160654U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57130743A (en) * | 1981-02-06 | 1982-08-13 | Mitsubishi Heavy Ind Ltd | Method and device for direct rolling type continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58160654U (en) | 1983-10-26 |
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