JPH027744B2 - - Google Patents
Info
- Publication number
- JPH027744B2 JPH027744B2 JP8299982A JP8299982A JPH027744B2 JP H027744 B2 JPH027744 B2 JP H027744B2 JP 8299982 A JP8299982 A JP 8299982A JP 8299982 A JP8299982 A JP 8299982A JP H027744 B2 JPH027744 B2 JP H027744B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sealed chamber
- volume
- tundish
- continuous casting
- 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
- 238000009749 continuous casting Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- 238000005266 casting Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 238000007654 immersion Methods 0.000 description 4
- 230000004043 responsiveness Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000277275 Oncorhynchus mykiss Species 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000007789 sealing 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
- B22D11/106—Shielding the molten jet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 本発明は、加圧式連鋳設備の改良に関する。[Detailed description of the invention] The present invention relates to improvements in pressurized continuous casting equipment.
連続鋳造の操業方法として圧力鋳造方法がある
が、これはタンデイツシユとモールドの間を、シ
ールドチヤンバと称する密閉室で囲み、その中に
不活性ガスを供給し、内部のガス圧を溶鋼ヘツド
と釣合う程度に保ちながら鋳片の引抜きを行なう
もので、この方法によれば、溶鋼と空気の接触の
ない断気鋳造ができるほか、モールド内液面にガ
ス圧力が作用しているので、溶鋼とモールド壁面
との接触が良く、鋳片表面の欠陥が減少するなど
の利点がある。 Pressure casting is an operating method for continuous casting, in which a sealed chamber called a shield chamber is placed between the tundish and the mold, and an inert gas is supplied into the chamber so that the gas pressure inside is equal to that of the molten steel head. This method draws the slab while maintaining a level of balance.This method allows for air-insulated casting without contact between the molten steel and air, and since gas pressure acts on the liquid level in the mold, the molten steel It has the advantage of good contact with the mold wall surface and fewer defects on the slab surface.
また、鋳造中、モールドは上下に振動するが、
そのため該密閉室は伸縮できる構造となつてお
り、モールドの上下動に伴なつて該密閉室内の容
積は周期的に変動する。すなわち、第１図に示す
状態からモールドＭが距離Ｓ上昇して第２図に示
す状態になると、この場合の密閉室の容積V2は、
元の容積V1から容積Ｂだけ減少し、容積Ｃだけ
増加する。従つてV2＝V1−（Ｂ−Ｃ）となる。そ
してＢ＝ＣのときV2＝V1となり、モールドの振
動に無関係に密閉室内の容積を一定に保つことが
できるけれども、これは実際の設計上は不可能で
ある。この密閉室内の容積変動は、密閉室内のガ
ス圧力を制御してモールド内の湯面を一定に保つ
場合、外乱となつてガス圧制御系を複雑するとい
う不具合の一原因となつている。また、密閉室の
容積それ自体も、ガス圧制御の応答性の面から制
約を受ける。すなわち、該密閉室の容積が大きす
ぎする、密閉室内の圧力を静定させるのに時間が
かかるし、これを短時間で安定させるには多量の
不活性ガスを供給しなければならないので不経済
であるという難点がある。また、逆に小さすぎる
と、溶鋼及び浸漬ノズルからの輻射熱の影響を受
け易くなり、密閉室構成部材の耐熱上厄介な問題
が生じるという欠点があつた。 Also, during casting, the mold vibrates up and down,
Therefore, the sealed chamber has a structure that can be expanded and contracted, and the volume within the sealed chamber changes periodically as the mold moves up and down. That is, when the mold M rises a distance S from the state shown in FIG. 1 to the state shown in FIG. 2, the volume V 2 of the sealed chamber in this case is
The original volume V1 is decreased by volume B and increased by volume C. Therefore, V 2 =V 1 -(B-C). When B=C, V 2 =V 1 , and the volume inside the sealed chamber can be kept constant regardless of the vibration of the mold, but this is impossible in actual design. When the gas pressure in the sealed chamber is controlled to maintain a constant level of hot water in the mold, this variation in volume within the sealed chamber becomes a disturbance and complicates the gas pressure control system, which is one of the causes of problems. Further, the volume of the sealed chamber itself is also limited by the responsiveness of gas pressure control. In other words, the volume of the sealed chamber is too large, it takes time to stabilize the pressure inside the sealed chamber, and a large amount of inert gas must be supplied to stabilize the pressure in a short time, which is uneconomical. There is a problem that it is. On the other hand, if it is too small, it becomes susceptible to the effects of radiant heat from the molten steel and the immersion nozzle, resulting in troublesome problems regarding the heat resistance of the sealed chamber constituent members.
本発明は、モールドの上下振動による密閉室の
伸縮にかかわらず、その容積変化を最小限にする
構造となし、モールド振動による密閉室内の圧力
変動を小さくし、圧力制御の応答性の良好な最適
の密閉室容積をもつ加圧式連鋳設備を提供するこ
とを目的として提案されたもので、タンデイツシ
ユとモールドの間を、伸縮自在な密閉室で囲み、
該密閉室内に不活性ガスを供給し、そのガス圧を
溶鋼の全水頭とほぼ釣合つた状態にして鋳片の引
抜きを行なうように構成した加圧式連鋳設備にお
いて、上記密閉室の容積Ｖを、Ｖ＝（1.0〜10.0）
Ａ・Ｈ（ただしＡはモールドの断面積、Ｈはモー
ルドの上昇限時におけるモールド上端面とタンデ
イツシユ底面間の距離）の範囲とし、かつモール
ドが上下振動して密閉室が伸縮するときの該密閉
室の容積変化量ΔVを、ΔV＝（0.002〜0.05）Ｖの
範囲に規制してなることを特徴とする加圧式連鋳
設備に係るものである。 The present invention has a structure that minimizes changes in volume regardless of the expansion and contraction of the sealed chamber due to vertical vibration of the mold, reduces pressure fluctuations in the sealed chamber due to mold vibration, and optimizes pressure control responsiveness. This was proposed with the aim of providing pressurized continuous casting equipment with a closed chamber volume of
In pressurized continuous casting equipment configured to supply an inert gas into the sealed chamber and draw the slab with the gas pressure approximately balanced with the total head of molten steel, the volume of the sealed chamber V , V=(1.0~10.0)
The range of A and H (where A is the cross-sectional area of the mold and H is the distance between the upper end surface of the mold and the bottom surface of the tundish at the time when the mold rises), and when the mold vibrates vertically and the sealed chamber expands and contracts. The present invention relates to a pressurized continuous casting equipment characterized in that the volume change amount ΔV of is regulated within the range of ΔV=(0.002 to 0.05)V.
以下、第３図及び第４図に示す実施例により、
本発明につき具体的に説明する。第３図におい
て、１はタンデイツシユ、２はモールドで、同モ
ールド２とタンデイツシユ１の間には、密閉室を
形成するモールド２の上端に取付けられた外筒３
と、タンデイツシユ１の底面に取付けられた内筒
３′と、それら両筒３，３′間に取付けられたベロ
ーズ７で構成される包囲部材が第３図に示すよう
に設けられており、上記各筒３，３′と、タンデ
イツシユ１及びモールド２間のシールは十分に確
保されている。４は外筒３に一端を流体密に取付
けられ、他端を不活性ガス源（図示せず）に接続
され、かつ制御弁４ａを介装された不活性ガス供
給管、５は一端を外筒３に流体密に取付けられ、
他端を大気に開放され、かつ制御弁５ａを介装さ
れた不活性ガス排出管で、それら制御弁４ａ，５
ａにより密閉室内のガス圧を制御するようになつ
ている。６はタンデイツシユ１に取付けられたス
トツパで、同ストツパ６の操作によりタンデイツ
シユ１内の溶鋼を浸漬ノズル８を介してモールド
２内へ供給または停止するようになつている。 Hereinafter, according to the embodiment shown in FIGS. 3 and 4,
The present invention will be specifically explained. In Fig. 3, 1 is a tundish, 2 is a mold, and between the mold 2 and the tundish 1 is an outer cylinder 3 attached to the upper end of the mold 2 forming a sealed chamber.
As shown in FIG. 3, an enclosing member consisting of an inner cylinder 3' attached to the bottom surface of the tundish 1 and a bellows 7 attached between the two cylinders 3 and 3' is provided as shown in FIG. Sufficient sealing is ensured between each tube 3, 3', tundish 1, and mold 2. 4 is an inert gas supply pipe whose one end is fluid-tightly attached to the outer cylinder 3, the other end is connected to an inert gas source (not shown), and a control valve 4a is interposed; is fluid-tightly attached to the cylinder 3,
An inert gas discharge pipe whose other end is open to the atmosphere and has a control valve 5a interposed therein.
The gas pressure inside the sealed chamber is controlled by a. Reference numeral 6 denotes a stopper attached to the tundish 1, and when the stopper 6 is operated, the molten steel in the tundish 1 is supplied into the mold 2 through the immersion nozzle 8 or stopped.
本発明は、上記構成の密閉室の容積Ｖを、第４
図に示すように、モールド断面積Ａと、モールド
２の上昇限時におけるモールド２の上端面とタン
デイツシユ１の底面間の距離Ｈに対し、Ｖ＝（1.0
〜10.0）Ａ・Ｈの関係の範囲内とし、かつ密閉室
の容積変化量ΔVを、ΔV＝（0.002〜0.05）Ｖの範
囲内としたことを構成要件とするもので、この要
件により、モールド２内の液面を、鋳造開始時に
短時間に安定化させ、また、鋳造中のモールド内
液面の変動や制御圧力の変化に対しても応答性が
良くなり、その制御が容易になるものである。な
お、上記密閉室容積Ｖは、浸漬ノズル８の体積を
差し引いた値である。 In the present invention, the volume V of the sealed chamber configured as described above is
As shown in the figure, V = (1.0
~10.0) The configuration requirements are that the relationship between A and H is within the range, and the volume change ΔV of the sealed chamber is within the range of ΔV = (0.002 to 0.05) V. 2. Stabilizes the liquid level in the mold in a short time at the start of casting, and also improves responsiveness to fluctuations in the liquid level in the mold and changes in control pressure during casting, making it easier to control. It is. Note that the sealed chamber volume V is a value obtained by subtracting the volume of the immersion nozzle 8.
本発明の加圧式連鋳設備は、上記のような構
成、作用を具有するものであるから、本発明によ
れば、モールド内液面を、鋳造開始時に短時間に
安定化させることができるばかりでなく、鋳造中
のモールド内液面の変動や制御圧力の変化に対し
ても圧力制御の応答性が良くなり、制御が容易と
なるなどの実用的効果を挙げることができる。 Since the pressurized continuous casting equipment of the present invention has the above-described configuration and operation, according to the present invention, the liquid level in the mold can be stabilized in a short time at the start of casting. In addition, the responsiveness of pressure control to fluctuations in the liquid level in the mold and changes in control pressure during casting is improved, and practical effects such as easier control can be achieved.
第１図、第２図は、タンデイツシユとモールド
間に密閉室を形成した場合におけるモールドの上
下振動による該密閉室の容積変化の状態を説明す
る図、第３図及び第４図は、本発明の加圧式連鋳
設備の一実施例の概略説明図で、第３図は一部を
切開して示す側面図、第４図は密閉室の容積設定
態様説明図である。
１：タンデイツシユ、２：モールド、３：外
筒、３′：内筒、４，５：圧力制御弁、６：スト
ツパ、７：ベローズ、８：浸漬ノズル。
FIGS. 1 and 2 are diagrams illustrating how the volume of the sealed chamber changes due to vertical vibration of the mold when a sealed chamber is formed between the tundish and the mold, and FIGS. FIG. 3 is a partially cutaway side view, and FIG. 4 is a diagram illustrating a mode of setting the volume of the sealed chamber. 1: tandice, 2: mold, 3: outer cylinder, 3': inner cylinder, 4, 5: pressure control valve, 6: stopper, 7: bellows, 8: immersion nozzle.
Claims (1)
な密閉室で囲み、該密閉室内に不活性ガスを供給
し、そのガス圧を溶鋼の全水頭とほぼ釣合つた状
態にして鋳片の引抜きを行なうように構成した加
圧式連鋳設備において、上記密閉室の容積Ｖを、
Ｖ＝（1.0〜10.0）Ａ・Ｈ（ただしＡはモールドの
断面積、Ｈはモールドの上昇限時におけるモール
ド上端面とタンデイツシユ底面間の距離）の範囲
とし、かつモールドが上下振動して密閉室が伸縮
するときの該密閉室の容積変化量ΔVを、ΔV＝
（0.002〜0.05）Ｖの範囲に規制してなることを特
徴とする加圧式連鋳設備。1. The space between the tundish and the mold is surrounded by an expandable and retractable sealed chamber, and an inert gas is supplied into the sealed chamber so that the gas pressure is almost balanced with the total water head of the molten steel and the slab is drawn. In the pressurized continuous casting equipment configured as follows, the volume V of the sealed chamber is
V = (1.0 to 10.0) A/H (where A is the cross-sectional area of the mold, and H is the distance between the upper end of the mold and the bottom of the tundish at the end of the mold's rising time), and the mold vibrates vertically to create a sealed chamber. The volume change ΔV of the sealed chamber when it expands and contracts is expressed as ΔV=
(0.002 to 0.05) Pressurized continuous casting equipment is characterized by being regulated within the range of V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8299982A JPS58199652A (en) | 1982-05-19 | 1982-05-19 | Pressurizing type continuous casting installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8299982A JPS58199652A (en) | 1982-05-19 | 1982-05-19 | Pressurizing type continuous casting installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58199652A JPS58199652A (en) | 1983-11-21 |
| JPH027744B2 true JPH027744B2 (en) | 1990-02-20 |
Family
ID=13789916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8299982A Granted JPS58199652A (en) | 1982-05-19 | 1982-05-19 | Pressurizing type continuous casting installation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58199652A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3905328C1 (en) * | 1989-02-17 | 1990-07-19 | Mannesmann Ag, 4000 Duesseldorf, De |
-
1982
- 1982-05-19 JP JP8299982A patent/JPS58199652A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58199652A (en) | 1983-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2205327A (en) | Means for casting metals | |
| JP3061641B2 (en) | Method and apparatus for filling molten metal into permanent mold | |
| US3931913A (en) | Slide gate nozzle | |
| IN169695B (en) | ||
| JPH027744B2 (en) | ||
| US2852822A (en) | Vacuum seal for pressure pouring apparatus | |
| US5178203A (en) | Apparatus for the countergravity casting of metals | |
| CA1248844A (en) | Surge suppression device | |
| US2960736A (en) | Casting arrangement for all metals | |
| JPS6347544B2 (en) | ||
| JPS6224850A (en) | Method and apparatus for blowing inert gas to low-pressure casting machine | |
| JPS5874256A (en) | Horizontal continuous casting installation | |
| US2274580A (en) | Production of metal castings | |
| JP2517598B2 (en) | Method and device for supplying and discharging hot water in a constant temperature surface warming furnace | |
| JPS5835051A (en) | Tundish in continuous casting machine | |
| KR19980024011A (en) | Method for obtaining the transverse vibration of the wall of the crystallizer of the ingot mold by pulsation in the cooling fluid | |
| KR840002270A (en) | Horizontal Continuous Casting Method | |
| JP3727444B2 (en) | Differential pressure casting apparatus and differential pressure casting method | |
| JPH0694072A (en) | U-shaped type damping tank | |
| JPS6143153B2 (en) | ||
| SU1282954A1 (en) | Method of feeding molten metal to the mould of continuous casting machine | |
| JPH02169147A (en) | Method for forming lost forming pattern with core | |
| JPS6227315Y2 (en) | ||
| US5469631A (en) | Air bubble free compass and method of manufacturing same | |
| JPH0756106Y2 (en) | Horizontal continuous casting equipment |