WO2012074086A1 - スライディングノズルプレート及びそれを使用したスライディングノズル装置 - Google Patents
スライディングノズルプレート及びそれを使用したスライディングノズル装置 Download PDFInfo
- Publication number
- WO2012074086A1 WO2012074086A1 PCT/JP2011/077891 JP2011077891W WO2012074086A1 WO 2012074086 A1 WO2012074086 A1 WO 2012074086A1 JP 2011077891 W JP2011077891 W JP 2011077891W WO 2012074086 A1 WO2012074086 A1 WO 2012074086A1
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- WIPO (PCT)
- Prior art keywords
- sliding nozzle
- plate
- nozzle plate
- cylinder
- main body
- Prior art date
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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
- B22D41/28—Plates therefor
-
- 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
-
- 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
- B22D41/28—Plates therefor
- B22D41/34—Supporting, fixing or centering means therefor
Definitions
- the present invention relates to a sliding nozzle plate (hereinafter referred to as “SN plate”) used in a sliding nozzle device (hereinafter referred to as “SN device”) for adjusting the amount of molten metal flowing out from a molten metal container.
- the peripheral part of the through-hole which becomes the flow path of is made up of parts independent of the SN plate main body part which is the other region, and the peripheral part of the through-hole is integrated and integrated in the SN plate main body part SN plate (hereinafter referred to as “composite SN plate”) and an SN device using the same.
- the “composite SN plate” referred to in the present specification includes not only a case where the SN plate body is a regenerated SN plate obtained by regenerating a used SN plate but also a case where it is a new SN plate.
- the SN device is widely used in molten steel pans and tundishes because it has the advantage of being able to accurately control the flow rate of molten metal.
- an SN plate is equipped with an upper plate and a lower plate, and the lower plate is slid in the opening direction or the closing direction.
- the outflow amount of the molten metal is adjusted by matching or shifting the through holes (nozzle holes) provided in.
- the SN plate used in such an SN device is damaged by molten metal during use.
- the through-hole through which the molten metal passes is severely damaged.
- it is necessary to replace the damaged SN plate it is required to be reused from the viewpoint of economy, and several methods have already been proposed.
- Patent Document 1 discloses a method for regenerating an SN plate by expanding the diameter of a through-hole of an SN plate after use and attaching a cylindrical body having an annular flange to the expanded diameter of the through-hole. Has been.
- FIG. 2 shows an SN device using an SN plate regenerated by the method of Patent Document 1 as a lower plate.
- 1 is an upper plate
- 2 is a reproduction
- 3 is the cylinder which has the cyclic
- Such a problem of the displacement of the cylindrical body 3 and the insertion of the metal to the joint portion 4 is a problem that occurs not only in the lower reproduction plate 2 but also in all the composite SN plates in which the cylindrical body is mounted on the SN plate main body portion. .
- Problems to be solved by the present invention include a composite SN plate in which a cylinder is mounted on an SN plate main body, and a displacement of the cylinder and a metal insertion to a joint between the cylinder and the SN plate main body. It is to be able to prevent.
- an SN plate used in a sliding nozzle device for adjusting the amount of molten metal flowing out from a molten metal container, wherein a peripheral portion of a through-hole serving as a molten metal flow path It is a part that is independent of the SN plate main body, which is a region, and is composed of a cylinder having a collar, and this cylinder is connected to the SN plate main body at least on the outer peripheral surface of the cylinder and the SN plate main body.
- an SN plate that is an integrated structure that is attached to an inner hole surface via an adhesive and that satisfies the following conditional expressions (1) and (2).
- the present inventor conducted various operations using the regenerated lower plate 2 having the form described in FIG. 2 for actual operation.
- the cylinder 3 used for the regenerated lower plate 2 is displaced.
- the dominant factor to be caused is an upward force due to the bayonet tightening force from the lower nozzle 5 joined to the lower part of the cylindrical body 3.
- the regenerative lower plate 2 is also subjected to a surface pressure applied between the plates and a downward force due to the molten steel flow, but the force acting on the cylinder 3 is dominated by the upward force due to the bayonet tightening force from the lower nozzle 5. Met. This upward force causes a problem that the cylinder 3 is displaced during use (during casting).
- the present inventor has made various studies to prevent the displacement of the cylindrical body 3 due to the upward force.
- the cost of the hook 3a of the cylindrical body 3 and the main body portion (SN plate main body portion) of the lower reproduction plate 2 is determined.
- the displacement of the cylindrical body 3 can be prevented by securing a cost of 2.5 mm or more. This condition is expressed by the above conditional expression (1).
- the joint portion 4 is always exposed to the molten steel flow as shown in FIG. 2 and is easily eroded. As a result, it is found that the joint portion is generated at the joint portion. It was. And, in order to prevent the ingot from being inserted into the joint portion, it is important to manage the joint thickness, and as a result of the verification, it was found that the joint thickness needs to be managed to 2 mm or less. This condition is expressed by the conditional expression (2).
- conditional expression (3) Is preferably satisfied.
- ⁇ D is the inner diameter (mm) of the cylinder, which is the same size as the inner diameter of the through hole (nozzle hole) of the SN plate after use.
- the right side ( ⁇ B ⁇ D) in the above conditional expression corresponds to twice the boring cost.
- an upward force due to the bayonet tightening force from the lower nozzle 5 acts on the cylinder 3, but a downward force due to the surface pressure applied between the plates and the molten steel flow also acts.
- the downward force may be greater than the upward force.
- the cylinder 3 may be displaced downward.
- an adhesive having excellent adhesive strength as an adhesive material applied to the joint portion 4 between the cylindrical body 3 and the SN plate main body, specifically metal It is preferable to use a mortar containing aluminum and carbon. That is, since the mortar contains metallic aluminum in addition to carbon, it reacts by receiving heat during actual operation to form an aluminum-carbon bond. Thereby, the adhesive strength is increased, and the yield strength against the positional deviation of the cylindrical body 3 (hereinafter referred to as “positional deviation tolerance”) can be further increased.
- the joint portion 4 where the mortar is constructed is exposed to the molten metal outflow route and is exposed to the molten metal, so that excellent corrosion resistance is required.
- the mortar has a lower strength than the upper plate 1 and the cylinder 3 and has a low density because it is not pressed by a press or the like. For this reason, compared with SN plate main-body part and the cylinder 3, it is easy to receive the corrosion by a molten metal, and the corrosion resistance of the joint part 4 (mortar) becomes an important equipment characteristic.
- a carbon-containing mortar is first used in order to impart corrosion resistance to the joint mortar.
- Inclusions in the molten metal are mostly low melting point oxides, and these oxides react with refractories, so that surface deterioration of the plate bricks progresses. For this reason, it is common to use a refractory material containing carbon in order to make it difficult to get wet with the oxides as described above, and to perform a pitch impregnation treatment. The same applies to the mortar at the joint.
- the mortar suitably used in the present invention contains metallic aluminum in addition to carbon. Since aluminum has an excellent deoxidizing ability under molten steel refining, it is known that corrosion resistance is improved when oxygen in molten metal is taken in and rendered harmless and added to a refractory. Similarly, the corrosion resistance of the mortar at the joint can be improved by adding metallic aluminum. Furthermore, the coexistence of metallic aluminum and carbon, as described above, reacts by receiving heat during actual operation to form an aluminum / carbon bond, thereby improving the adhesive strength.
- the metal aluminum content of the mortar used in the present invention is 1 to 15% by mass and the carbon content is 1 to 15% by mass.
- a plurality of annular grooves 3b may be formed on the outer peripheral surface of the cylindrical body 3 as shown in FIG. Thereby, an adhesion area becomes large and the displacement tolerance of the cylinder 3 also becomes large.
- the SN plate (composite SN plate) of the present invention described above is suitably used as the lower plate of the SN device, and the SN device of the present invention is provided by mounting the SN plate of the present invention as the lower plate.
- FIG. 1A shows the upper plate after use
- FIG. 1B shows a regenerated lower plate (composite SN plate) that is regenerated using the upper plate in FIG. 1A as the lower plate.
- the SN apparatus which used the composite SN plate for the lower plate is shown.
- the SN apparatus which used the composite SN plate for the lower plate and the upper plate is shown.
- In the evaluation of the regeneration rate the range in which the presence or absence of cracks is observed is shown.
- regeneration plate (composite SN plate) which formed the annular groove of the multistage in the outer peripheral surface of the cylinder is shown.
- FIG. 1A shows the upper plate after use
- FIG. 1B shows a regenerated lower plate (composite SN plate) that is regenerated using the upper plate in FIG. 1A as the lower plate.
- This regenerated lower plate can be manufactured by the same method as in Patent Document 1.
- the cylindrical body 3 having the annular flange portion 3a is attached to the through-hole 1b 'whose diameter has been increased from the side of the sliding surface 1c that has been used so far via the joint portion 4 (adhesive). Thereafter, the dowel portion 1a is removed by polishing, and a new sliding surface 1c 'is formed to form the regenerated lower plate 2.
- the present invention satisfies the following conditional expressions (1) to (3) as described above. ⁇ B ⁇ ⁇ I-5 (1) ⁇ B- ⁇ R ⁇ 4 (2) ⁇ B- ⁇ D ⁇ 30 (3)
- ⁇ B is the diameter (mm) of the through hole 1b 'after the diameter expansion, and corresponds to the bore diameter of the through hole 1b, that is, the diameter of the inner hole of the SN plate body.
- ⁇ I is the outer diameter (mm) of the flange portion 3a of the cylindrical body 3, and corresponds to the diameter of the base of the dowel portion of the new lower plate.
- ⁇ R is the outer diameter (mm) of the cylinder
- ⁇ D is the inner diameter (mm) of the cylinder.
- conditional expression (1) represents the condition that the allowance between the flange portion 3a of the cylindrical body 3 and the main body portion of the reproduction lower plate 2 is 2.5 mm or more.
- conditional expression (3) represents the conditions that joint thickness shall be 2 mm or less.
- conditional expression (3) represents the conditions that a boring allowance shall be 15 mm or more.
- the composite SN plate of the present invention is preferably used as a lower plate as shown in FIG. Although it cannot be used as the upper plate, when the composite SN plate is used as the upper plate, the joint portion 4 (adhesive) of the upper plate 1 leads to the negative pressure portion N generated by the flow of molten steel as shown in FIG. Therefore, there is a concern about the intrusion of outside air through the joint portion 4. Therefore, as shown in FIG. 2, it is preferable to use the composite SN plate as the lower plate and the new upper plate as the upper plate.
- a new SN plate can be used for the SN play main body.
- a new SN plate having an inner hole having the same diameter as the enlarged through-hole 1b 'shown in FIG. 1B is produced, and the cylinder 3 is mounted on the new SN plate.
- Example A In this example, the influence of the size of each part of the composite SN plate on the displacement of the used cylinder and the metal insert on the joint between the cylinder and the SN plate main body was investigated. The results are shown in Table 1.
- the composite SN plate in a present Example was used as a lower plate of SN apparatus for ladle.
- the material was general alumina-carbon.
- Examples 1 to 5 shown in Table 1 all satisfied conditional expressions (1) and (2), and no abnormality was confirmed during use.
- Comparative Example 1 did not satisfy the conditional expression (1), and the cylinder was displaced during use.
- the comparative example 2 was not satisfying conditional expression (2), and the metal insert to the joint part occurred at the time of use.
- Example B In this embodiment, when a regenerated SN plate obtained by regenerating a used SN plate is used for the SN plate main body, the boring cost of the through hole (nozzle hole) of the used SN plate is the SN after use. The effect on plate regeneration rate was investigated.
- the regeneration rate was evaluated as follows.
- the through hole (nozzle hole) of the SN plate after use is bored to increase the diameter.
- a range of 90 ° on the sliding side of the stroke part (a range indicated by A in FIG. 4) was observed, and those having no open cracks were made reproducible.
- a crack having a gap of 0.5 mm or more was determined as an open crack. This is because even if the molten steel comes into contact with the crack, if the crack does not reach 0.5 mm in width, the bare metal is unlikely to be inserted.
- the above operation was performed on 100 SN plates after use under the same boring conditions, and the ratio of those that were made reproducible was taken as the regeneration rate.
- FIG. 5 shows the relationship between “ ⁇ B: diameter of the through hole after diameter expansion— ⁇ D: inner diameter of the cylinder (mm)” corresponding to twice the boring cost and the regeneration rate. From the figure, it can be seen that a high reproduction rate of about 70% or higher can be obtained by satisfying the relationship of ⁇ B ⁇ D ⁇ 30, that is, the conditional expression (3). Further, if the relationship of ⁇ B ⁇ D ⁇ 40 is satisfied, a higher reproduction rate of about 80% or more can be obtained.
- Example C In this embodiment, in the lower reproduction plate 2 shown in FIG. 1 (b), the type of mortar (adhesive) applied to the joint portion 4 between the cylindrical body 3 and the SN plate main body portion is changed to change the lower reproduction plate. 2 was manufactured, and this was used with the lower plate of the SN device as shown in FIG. The width of the joint portion was unified at 2 mm.
- Examples 6 to 8 as the mortar containing metallic aluminum and carbon, “metallic Al + phenolic resin mortar” mainly containing alumina as a carbon source together with metallic aluminum is used. The amount of carbon added (content) was changed as shown in Table 2.
- Example 9 “water glass mortar” generally used for refractories was used.
- This water glass mortar is mainly composed of alumina and does not contain metallic aluminum and carbon.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
φB ≦ φI-5 … (1)
φB-φR ≦ 4 … (2)
ここで、φB:SNプレート本体部の内孔の直径(mm)
φI:筒体の鍔部の外径(mm)
φR:筒体の外径(mm)
φB-φD ≧ 30 … (3)
φB ≦ φI-5 … (1)
φB-φR ≦ 4 … (2)
φB-φD ≧ 30 … (3)
この実施例では、コンポジットSNプレートの各部の寸法が、使用した筒体の位置ずれ、及び筒体とSNプレート本体部との間の目地部への地金差しに及ぼす影響を調査した。その結果を表1に示す。なお、本実施例におけるコンポジットSNプレートは、取鍋用のSN装置の下プレートとして使用した。その材質は一般的なアルミナ-カーボン質とした。
この実施例では、SNプレート本体部に、使用後のSNプレートを再生した再生SNプレートを使用した場合において、使用後のSNプレートの貫通孔(ノズル孔)のボーリング加工代が、使用後のSNプレートの再生率に及ぼす影響を調査した。
この実施例では、図1(b)に示す再生下プレート2において、筒体3とSNプレート本体部との間の目地部4に施工されるモルタル(接着材)の種類を変えて再生下プレート2を製作し、これを図2に示すようにSN装置の下プレートと使用し、新品時のライフ(寿命)と比較した。目地部の幅は、2mmで統一した。
1a ダボ部
1b 貫通孔(ノズル孔)
1b’拡径された貫通孔
1c 摺動面
1c’新しい摺動面
2 再生下プレート(コンポジットSNプレート)
3 筒体
3a 鍔部
3b 環状溝
4 目地部(モルタル)
5 下ノズル
N 負圧部
Claims (6)
- 溶融金属容器からの溶融金属の流出量を調節するスライディングノズル装置に使用するスライディングノズルプレートであって、
溶融金属の流路となる貫通孔の周囲部分が、その他の領域であるスライディングノズルプレート本体部とは独立した部品であって、鍔部を有する筒体からなり、
この筒体を前記スライディングノズルプレート本体部に、少なくとも前記筒体の外周面と前記スライディングノズルプレート本体部の内孔面との間に接着材を介して装着した一体構造であり、
かつ、下記(1)及び(2)の条件式を充足するスライディングノズルプレート。
φB ≦ φI-5 … (1)
φB-φR ≦ 4 … (2)
ここで、φB:スライディングノズルプレート本体部の内孔の直径(mm)
φI:筒体の鍔部の外径(mm)
φR:筒体の外径(mm) - さらに下記(3)の条件式を充足する請求項1に記載のスライディングノズルプレート。
φB-φD ≧ 30 … (3)
ここで、φD:筒体の内径(mm) - 前記接着材は、金属アルミニウムとカーボンを含有するモルタルであり、このモルタルの一部が溶融金属と接触する請求項1又は2に記載のスライディングノズルプレート。
- 前記筒体の外周面に複数段の環状溝が形成されている請求項1~3のいずれかに記載のスライディングノズルプレート。
- 前記スライディングノズルプレート本体部が、使用後のスライディングノズルプレートを再生した再生スライディングノズルプレートである請求項1~4のいずれかに記載のスライディングノズルプレート。
- 請求項1~5のいずれかに記載のスライディングノズルプレートを下プレートとして装着したスライディングノズル装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US13/990,473 US20130284770A1 (en) | 2010-12-02 | 2011-12-02 | Sliding nozzle plate and sliding nozzle device using the same |
JP2012546953A JPWO2012074086A1 (ja) | 2010-12-02 | 2011-12-02 | スライディングノズルプレート及びそれを使用したスライディングノズル装置 |
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JP2010269358 | 2010-12-02 | ||
JP2010-269358 | 2010-12-02 | ||
JP2011-036035 | 2011-02-22 | ||
JP2011036035 | 2011-02-22 |
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WO2012074086A1 true WO2012074086A1 (ja) | 2012-06-07 |
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PCT/JP2011/077891 WO2012074086A1 (ja) | 2010-12-02 | 2011-12-02 | スライディングノズルプレート及びそれを使用したスライディングノズル装置 |
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US (1) | US20130284770A1 (ja) |
JP (1) | JPWO2012074086A1 (ja) |
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JP6027405B2 (ja) * | 2012-11-12 | 2016-11-16 | 東京窯業株式会社 | スライディングノズル用のプレート再生品の製造方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0238159U (ja) * | 1988-08-26 | 1990-03-14 | ||
JPH02175068A (ja) * | 1988-12-26 | 1990-07-06 | Kawasaki Refract Co Ltd | スライディングノズルプレート |
JPH05200531A (ja) * | 1992-01-24 | 1993-08-10 | Toshiba Ceramics Co Ltd | スライディングゲ−トプレ−ト |
JPH06166575A (ja) * | 1991-12-17 | 1994-06-14 | Kawasaki Steel Corp | 樹脂ボンド系不定形耐火物 |
JPH0952167A (ja) * | 1995-08-16 | 1997-02-25 | Toshiba Ceramics Co Ltd | スライディングゲート用プレートれんが |
JP2003183083A (ja) * | 2001-12-14 | 2003-07-03 | Kawasaki Refract Co Ltd | 不焼成れんが及びその製造方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2731725B2 (ja) * | 1994-08-25 | 1998-03-25 | 東芝セラミックス株式会社 | 再生スライドゲートプレート |
JP2942180B2 (ja) * | 1995-10-25 | 1999-08-30 | 東芝セラミックス株式会社 | スライドゲートプレート用補修材 |
JPH09225628A (ja) * | 1996-02-26 | 1997-09-02 | Kurosaki Refract Co Ltd | プレートれんが |
JP2000117421A (ja) * | 1998-10-13 | 2000-04-25 | Shinagawa Refract Co Ltd | スライドバルブプレート及びその製造方法 |
-
2011
- 2011-12-02 JP JP2012546953A patent/JPWO2012074086A1/ja active Pending
- 2011-12-02 WO PCT/JP2011/077891 patent/WO2012074086A1/ja active Application Filing
- 2011-12-02 US US13/990,473 patent/US20130284770A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0238159U (ja) * | 1988-08-26 | 1990-03-14 | ||
JPH02175068A (ja) * | 1988-12-26 | 1990-07-06 | Kawasaki Refract Co Ltd | スライディングノズルプレート |
JPH06166575A (ja) * | 1991-12-17 | 1994-06-14 | Kawasaki Steel Corp | 樹脂ボンド系不定形耐火物 |
JPH05200531A (ja) * | 1992-01-24 | 1993-08-10 | Toshiba Ceramics Co Ltd | スライディングゲ−トプレ−ト |
JPH0952167A (ja) * | 1995-08-16 | 1997-02-25 | Toshiba Ceramics Co Ltd | スライディングゲート用プレートれんが |
JP2003183083A (ja) * | 2001-12-14 | 2003-07-03 | Kawasaki Refract Co Ltd | 不焼成れんが及びその製造方法 |
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US20130284770A1 (en) | 2013-10-31 |
JPWO2012074086A1 (ja) | 2014-05-19 |
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