WO2010032550A1 - 溶湯清浄化装置 - Google Patents
溶湯清浄化装置 Download PDFInfo
- Publication number
- WO2010032550A1 WO2010032550A1 PCT/JP2009/063028 JP2009063028W WO2010032550A1 WO 2010032550 A1 WO2010032550 A1 WO 2010032550A1 JP 2009063028 W JP2009063028 W JP 2009063028W WO 2010032550 A1 WO2010032550 A1 WO 2010032550A1
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- WO
- WIPO (PCT)
- Prior art keywords
- molten metal
- cleaning apparatus
- holding
- furnace
- processing cylinder
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
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- 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
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
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- 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
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/118—Refining the metal by circulating the metal under, over or around weirs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/064—Obtaining aluminium refining using inert or reactive gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
Definitions
- the present invention relates to a molten metal cleaning apparatus for removing non-metallic inclusions and hydrogen gas in a molten metal.
- a molten metal produced by melting an aluminum ingot or the like has a problem that it inevitably contains non-metallic inclusions and hydrogen gas. If such non-metallic inclusions and hydrogen gas are contained in the molten metal, it is not preferable because it causes defects in the molded product. Therefore, a refining device, a so-called degassing device, for promoting the separation and removal of non-metallic inclusions from the molten metal and reducing the amount of hydrogen gas is known.
- the refining device mainly includes a rotating rotor that rotates in a molten metal and a drive unit that drives the rotating rotor.
- a disk-shaped rotating body is provided at the lower part of the rotating rotor, and the inert gas is blown out from a through hole formed in the bottom surface of the rotating body.
- the molten metal in the melting furnace is treated with the inert gas, and the hydrogen dissolved in the molten metal is diffused into the bubbles of the inert gas, while the nonmetallic inclusions are removed from the inert gas and the molten metal. It can be attached to the interface and separated as a soot.
- the amount of hydrogen gas in the molten metal can be reduced, and non-metallic inclusions can be separated from the molten metal to increase the cleanliness.
- the molten metal is frequently pumped with a ladle or the like, so that an oxide film or the like is inevitably formed on the molten metal surface to clean it.
- the degree decreases.
- the residence time of the molten metal in the pumping chamber is relatively long, the water vapor in the atmosphere reacts with the surface of the molten metal. As a result, an oxide film is formed, and hydrogen, which is a reaction product, is dissolved in the molten metal, resulting in an increase in the amount of hydrogen gas.
- the present invention is a molten metal cleaning apparatus that does not hinder the operation of the ladle in the pumping chamber or the crucible furnace, and performs degassing and degassing of the molten metal to increase the cleanliness of the molten metal and hydrogen. It is an object of the present invention to provide a molten metal cleaning device that keeps the amount of gas low and has a low possibility of pumping the generated soot with a ladle or the like.
- the present invention is a molten metal cleaning device used in a holding chamber for holding a molten metal of a continuous processing furnace, wherein the molten metal flows into the inside and an outlet hole through which the molten metal flows into the outside.
- a cylindrical processing cylinder part provided with an outlet hole and disposed in the holding chamber; and a refining apparatus that performs at least one of a degassing process and a degassing process on the molten metal in the processing cylinder part.
- the upper end of the processing cylinder part protrudes from the surface of the molten metal in the holding chamber.
- the holding chamber is preferably a pumping chamber for pumping the molten metal to the outside.
- the non-metallic inclusions separated by the refining device float on the molten metal surface and become traps. Stay.
- the soot can be prevented from flowing out of the processing cylinder in the holding chamber, so that it is possible to prevent the soot from being mixed when the molten metal is pumped out from the holding chamber with a ladle or the like.
- the degassing process means a broad dehumidification process including a degassing process when no flux is used unless otherwise specified.
- the present invention is also a molten metal cleaning apparatus used in a holding furnace for heating and holding a molten metal, and is provided with an inlet hole for allowing the molten metal to flow into the interior and an outlet hole for allowing the molten metal to flow outside. And a refining device that performs at least one of degassing and degassing with respect to the molten metal in the processing cylinder, and the upper end of the processing cylinder is It protrudes from the surface of the molten metal in the holding furnace.
- the holding furnace is preferably a crucible furnace.
- the non-metallic inclusions separated by the refining device float on the molten metal surface and become traps, but the upper end of the processing tube portion protrudes from the molten metal surface, so that it is in the processing tube portion.
- Stay. in the holding furnace that heats and holds the molten metal, it is possible to prevent the soot from flowing out of the processing cylinder, so that the soot is prevented from being mixed when the molten metal is pumped out of the holding furnace with a ladle or the like. Can do.
- the inlet hole is formed below the outlet hole. According to such a configuration, since the moving distance of the molten metal in the processing cylinder portion is increased, degassing and degassing efficiency can be increased.
- a plurality of openings are provided at the lower end of the processing cylinder part, and the opening is the inlet hole.
- the opening also serves as the inlet hole, the molten metal in the pumping region of the holding chamber or the holding furnace is caused to flow again from the opening (inlet hole) by the upward swirling flow of the molten metal in the processing cylinder, and the outlet It is possible to return to the holding chamber or the pumping area of the holding furnace through the hole for circulation.
- the internal quality of the casting can be improved.
- the processing cylinder part has a bottom part. According to such a configuration, it is possible to prevent the molten metal and soot from solidifying and depositing on the bottom surface of the holding chamber or holding furnace.
- a filter is formed in the outlet hole. According to such a configuration, it is possible to further prevent non-metallic inclusions from flowing out of the processing cylinder portion.
- the refining device includes a rotating rotor that rotates in the molten metal, a driving unit that drives the rotating rotor, and a support unit that supports the driving unit.
- the rotating rotor includes a stirring unit that stirs the molten metal, a shaft that transmits the rotation of the driving unit to the stirring unit, and a discharge hole that is formed under the stirring unit and discharges an inert gas. It is preferable to have. According to such a configuration, it is possible to reliably separate non-metallic inclusions contained in the molten metal in the processing cylinder portion and to reduce the amount of hydrogen gas.
- the refining device is provided with an elevating means for elevating the shaft.
- the stirring part attached to the shaft moves up and down in the molten metal, the dispersibility of the inert gas can be improved.
- the molten metal cleaning apparatus when the molten metal is pumped out from the holding chamber or holding furnace with a ladle or the like, the possibility of fouling being mixed can be reduced, and the internal quality and surface quality of the casting can be reduced. Can be improved.
- the processing cylinder portion has a plurality of openings at the lower end and the opening also serves as an inlet hole, the molten metal in the pumping region of the holding chamber is opened (inlet) by the upward swirling flow of the molten metal in the processing cylinder portion. It is possible to flow in again from the hole) and return to the pumping area of the holding chamber through the outlet hole for circulation.
- the continuous processing furnace 2 includes a melting furnace 3 for melting, for example, an aluminum ingot E, and a pumping chamber 4 for holding a molten metal Y melted in the melting furnace 3.
- the melting furnace 3 is provided with a burner (not shown), and is heated at about 720 ° C. to 900 ° C. to melt the aluminum ingot E to generate the molten metal Y.
- the pumping chamber 4 is arranged in parallel with the melting furnace 3 across the furnace wall 5 and includes a molten metal cleaning device 1 described later, and holds the cleaned molten metal Y.
- the drawing chamber 4 corresponds to a “holding chamber” in the claims.
- a hot water outlet 6 is formed in the lower part of the furnace wall 5 of the melting furnace 3 so that the molten metal Y flows from the melting furnace 3 side to the pumping chamber 4 side. Yes.
- a region outside the processing cylinder unit 10 is referred to as a pumping region 4a.
- the molten metal Y held in the pumping area 4a is pumped to the outside by a ladle (not shown) and cast into a mold or the like.
- the three walls constituting the pumping chamber 4 are referred to as wall portions 7, 7, 7.
- the molten metal cleaning device 1 is disposed in the pumping chamber 4, and performs a degassing process and a degassing process on the molten metal Y melted in the melting furnace 3. Then, the non-metallic inclusions contained in the molten metal Y are separated and removed, the amount of hydrogen gas is reduced, and the processed molten metal Y is caused to flow into the pumping region 4a.
- the molten metal cleaning apparatus 1 has a processing cylinder portion 10 having a cylindrical shape and a purification apparatus 20 installed in the processing cylinder portion 10.
- the processing cylinder portion 10 is a cylindrical member having a circular shape in plan view, and is a cylindrical portion 11 having a circular shape in plan view, leg portions 12, 12... Formed at the lower end of the cylindrical portion 11, and adjacent leg portions. .. Are cut out between 12, 13,..., An outlet hole 15 formed in the upper part of the cylindrical portion 11, and a filter 17 formed outside the outlet hole 15. Have.
- the cylinder part 11 and the leg part 12 are formed with the ceramic in this embodiment, it does not restrict
- the cylinder part 11 is formed so as to have a circular hollow part in a plan view, and is arranged at a predetermined interval from the furnace wall 5 and the wall part 7.
- the size of the cylindrical portion 11 is not particularly limited, in the present embodiment, it is formed to be about a quarter of the capacity of the pumping chamber 4.
- the leg part 12,12 ... formed in the lower end of the cylinder part 11 at predetermined intervals is formed.
- the leg part 12 is formed so that the cylinder part 11 can be stably arranged.
- a plurality of openings 13 are formed between the adjacent leg portions 12 and 12.
- the opening 13 (inlet hole) is a hole through which the molten metal Y outside (pumping area 4 a) of the cylinder part 11 flows into the cylinder part 11.
- an outlet hole 15 is formed in the upper part of the side surface of the cylindrical portion 11.
- the outlet hole 15 is a hole for allowing the molten metal Y in the processing cylinder part 10 to flow out of the cylinder part 11 (pumping region 4a).
- the molten metal Y is taken into the cylindrical portion 11 from the opening 13, and the outside of the cylindrical portion 11 (pumping region) is extracted from the outlet hole 15. To 4a).
- the molten metal Y inside and outside the cylinder part 11 can be circulated.
- the shape, size, and the like of the opening 13 and the outlet hole 15 are not particularly limited, and may be set as appropriate according to the size of the continuous processing furnace 2 and the processing capacity of the purification apparatus 20.
- the upper end of the cylindrical portion 11 is formed so as to be located on the same plane as the upper end of the wall portion 7. That is, the upper end of the cylinder part 11 is formed so as to protrude above the surface of the molten metal Y as shown in FIG.
- the filter 17 is formed outside the outlet hole 15 drilled in the side surface of the cylindrical portion 11.
- the filter 17 is a filtration device for preventing non-metallic inclusions in the molten metal Y, particularly an oxide film having a relatively large size, from flowing out to the pumping region 4a.
- the material of the filter 17 is not particularly limited as long as it allows the molten metal Y to pass while holding the captured nonmetallic inclusions, particularly a relatively large oxide film, but in the present embodiment, for example, glass A cross is used.
- the filter 17 is attached via an annular attachment portion 16.
- the shape of the processing tube portion 10 is merely an example, and may be another shape.
- the processing cylinder portion 10 may be formed in a planar viewing angle shape.
- the process cylinder part 10 the furnace wall 5 of the melting furnace 3, and the wall part 7 of the pumping chamber 4 are spaced apart, you may arrange
- the refining device 20 is installed on the upper portion of the processing cylinder portion 10, and performs degassing processing and degassing processing on the molten metal Y in the processing cylinder portion 10. Non-metallic inclusions present in Y are separated and removed, and the amount of hydrogen gas is reduced.
- the refiner 20 according to the present embodiment supplies a rotating rotor 21 that rotates in the molten metal Y, a driving unit 22 that drives the rotating rotor 21, a support unit 23 that supports the driving unit 22, and an inert gas.
- the gas supply unit 25 is mainly included.
- the refining device 20 supplies an inert gas into the molten metal Y through the rotary rotor 21 and diffuses hydrogen dissolved in the molten metal into the bubbles of the inert gas, while converting the nonmetallic inclusions into the inert gas. It can be attached to the interface of the molten metal Y and floated and separated as soot.
- the rotary rotor 21 includes a shaft 31 buried in the molten metal Y, a stirring portion 32 formed at the lower end of the shaft 31, and a discharge port (not shown) that is formed on the bottom surface of the stirring portion 32 and discharges an inert gas. And have.
- the shaft 31 and the stirring unit 32 are integrally formed and are made of graphite or ceramic.
- the shaft 31 is rotated in the circumferential direction by the drive of the drive unit 22.
- a hollow portion is formed inside the shaft 31 so that an inert gas flows into the stirring portion 32 side.
- the rotational speed of the shaft 31 is not particularly limited, but is set to 300 rpm in the present embodiment.
- the stirring unit 32 has a substantially cylindrical shape and is formed at the tip of the shaft 31, and includes a plurality of swirling teeth 32 a formed by notching at a predetermined interval at the lower end.
- a discharge port (not shown) for discharging an inert gas is formed in the center of the bottom surface (lower part) of the stirring unit 32. Since the stirring part 32 has the swivel teeth 32a formed at the lower end, it can subdivide the inert gas discharged from the discharge port and can suitably stir the molten metal Y. Thereby, the degassing and degassing treatment efficiency of the molten metal Y can be increased.
- the stirring part 32 should just be a thing which can stir the molten metal Y, and a shape is not restrict
- the drive unit 22 is a power source that rotates the rotary rotor 21.
- the drive unit 22 is connected to the shaft 31 via a joint 28 and a bearing 29.
- the drive unit 22 includes a motor M1 that rotates the shaft 31, and a control unit 22a such as an inverter that controls the rotation direction and the number of rotations of the motor M1.
- the drive unit 22 is fixed to a support unit 23 formed over the upper portion of the cylinder unit 11.
- the gas supply unit 25 is a gas supply pipe that supplies an inert gas such as argon or nitrogen, and is set so that the inert gas flows into the rotating rotor 21 side in a predetermined amount.
- the gas supply unit 25 is set to be supplied at 1 to 10 L / min.
- Ar gas having a dew point of, for example, ⁇ 60 ° C. or less. If the inert gas contains water vapor, the inert gas is bubbled and released into the molten metal Y, and then an oxide film is formed on the inner surface of the bubble by the reaction between the molten metal Y and the water vapor in the bubble. At the same time, a reaction in which hydrogen, which is a reaction product, dissolves in the molten metal Y also occurs, which may reduce the degassing efficiency.
- the purification device 20 is formed so as to discharge only the inert gas from the rotary rotor 21.
- the gas and the flux may be configured to diffuse into the molten metal Y.
- the operation and effect of the molten metal cleaning apparatus 1 according to the present embodiment will be described.
- the molten metal Y melted in the melting furnace 3 flows into the pumping chamber 4 and flows into the processing cylinder portion 10 through the opening 13.
- the molten metal Y that has flowed into the processing tube portion 10 is guided to an outlet hole 15 formed in the upper portion of the processing tube portion 10.
- the inert gas is discharged and dispersed in the molten metal Y from the discharge port (not shown) formed in the stirring unit 32, the hydrogen dissolved in the molten metal Y is diffused into the bubbles of the inert gas.
- non-metallic inclusions can be attached to the interface between the inert gas and the molten metal Y and floated and separated as soot.
- the soot that floats on the molten metal surface means an oxide film, a non-metallic inclusion, or the like that is inherent in the molten metal Y. That is, the oxide film, non-metallic inclusions, etc., which were inherent in the molten metal Y, are also attached to the interface between the fine bubbles of the inert gas and the molten metal, and floated and separated together with the bubbles. Furthermore, the dissolved gas such as hydrogen in the molten metal Y diffuses into the inert gas in the bubbles having a lower chemical potential than in the molten metal, and is taken into the bubbles, floats on the surface of the molten metal, and blows as bubbles. Released into.
- soot that has floated on the surface of the molten metal Y stays on the surface of the molten metal Y, it does not flow out of the cylindrical portion 11 because the tip of the cylindrical tubular portion 11 protrudes above the surface of the molten metal. Even if soot flows out from the outlet hole 15, non-metallic inclusions, particularly oxide films having a relatively large size, are captured by the filter 17, and the soot flows out into the pumping region 4 a of the pumping chamber 4. Can be prevented to some extent.
- the opening part 13 is provided in the lower end of the cylinder part 11, and the exit hole 15 is provided in the upper part of the cylinder part 11, the moving distance of the molten metal Y in the process cylinder part 10 is long, Degassing and degassing efficiency can be increased.
- the cylinder part 11 is provided with a plurality of openings 13 at the lower end and the opening part 13 also serves as an inlet hole, due to the upward swirling flow of the molten metal Y in the cylinder part 11, The molten metal Y can flow again from the opening 13 and can be returned to the pumping region 4a of the pumping chamber 4 through the opening 13 and circulated.
- the metal in the pumping area 4a is increased.
- the amount of hydrogen gas in the molten metal Y can be reduced, and the internal quality of the casting can be improved.
- the fluidity of the molten metal Y in the pumping chamber 4 can be improved, the molten metal Y can be prevented from solidifying and depositing on the bottom surface of the pumping chamber 4.
- the molten metal cleaning apparatus 1 since the molten metal cleaning apparatus 1 is only disposed in the pumping chamber 4, only the molten metal cleaning apparatus 1 can be easily taken in and out of the pumping chamber 4. Thereby, maintenance of the molten metal cleaning apparatus 1 can be performed easily.
- FIG. 3 is a cross-sectional view showing a molten metal cleaning apparatus and a continuous processing furnace according to the second embodiment.
- the molten metal cleaning apparatus 51 according to the second embodiment is the first in that it includes a bottom 19 formed in the processing cylinder 10 and a lifting means 50 that lifts and lowers the rotary rotor 21.
- symbol is attached
- the molten metal cleaning apparatus 51 mainly includes the processing cylinder unit 10 and the purification apparatus 20.
- the processing cylinder portion 10 includes a cylindrical portion 11 having a circular shape in plan view, a bottom portion 19 formed at the lower end of the cylindrical portion 11, an inlet hole 14 formed in a lower portion of the cylindrical portion 11, and an upper portion of the cylindrical portion 11. It has a perforated outlet hole 15 and a filter 17 formed outside the outlet hole 15.
- the processing cylinder portion 10 is a bottomed cylindrical type having a bottom portion 19.
- the inlet hole 14 is formed in the lower part of the cylindrical part 11 and allows the molten metal Y to flow into the cylindrical part 11. Further, the outlet hole 15 is formed in the upper part of the cylindrical portion 11 and on the opposite side surface of the inlet hole 14.
- the purification apparatus 20 has a lifting / lowering means 50 that lifts and lowers the rotary rotor 21.
- the elevating means 50 is composed of a cylinder that is driven up and down, and holds the drive unit 22 via a holder 50a.
- the raising / lowering means 50 may be provided in the support part 23, and you may form so that the support part 23 may raise / lower.
- the raising / lowering means 50 is not limited to a cylinder, Other forms may be sufficient.
- the operation and effect of the molten metal cleaning apparatus 51 according to this embodiment will be described. As shown in FIG. 3, the same effect as that of the first embodiment can be obtained by the molten metal cleaning device 51. Further, since the bottom portion 19 is formed in the processing cylinder portion 10, even if a non-metallic inclusion having a large specific gravity settles, it stops in the processing cylinder portion 10 and does not accumulate on the bottom surface of the pumping chamber 4. . Thereby, the maintenance of the pumping chamber 4 can be reduced. In addition, by forming the inlet hole 14 above the bottom part 19, when the molten metal Y flows from the inlet hole 14, the non-metallic inclusions that have settled in the bottom part 19 are not lifted up. Objects can be allowed to settle.
- the inert gas can be efficiently dispersed in the molten metal Y.
- the oxide film in the molten metal Y, a nonmetallic inclusion, etc. can be removed more efficiently, and the amount of hydrogen gas can be reduced effectively.
- FIG. 4 is a cross-sectional view showing a molten metal cleaning apparatus and a crucible furnace according to a third embodiment.
- the molten metal cleaning apparatus was provided in the continuous processing furnace 2 was demonstrated, it is not limited to this, You may provide in the crucible furnace 82 like 3rd embodiment. .
- the molten metal cleaning apparatus 1 may be provided in the holding furnace 84 that holds the molten metal Y while melting the ingot in the crucible furnace 82.
- the object for installing the molten metal cleaning device according to the present invention is not limited to the pumping chamber 4 of the continuous processing furnace 2, and the molten metal Y is drawn when the molten metal Y is pumped by a ladle or the like. It may be a holding furnace 82 that is heated and held.
- the purification apparatus in the present embodiment uses an apparatus that performs both the degassing process and the degassing process, an apparatus that performs at least one of them may be used.
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Abstract
Description
また、処理筒部が下端に複数の開口部を備え、開口部が入口孔を兼ねる場合、処理筒部における金属溶湯の上昇旋回流によって、保持室の汲出し領域の金属溶湯を開口部(入口孔)から再度流入させ、出口孔を通して保持室の汲み出し領域へ戻して循環させることが可能となる。これにより、汲出し領域における金属溶湯の温度低下を防止することが可能となり、金属溶湯の処理筒内での実質的な滞留時間を長くすることで、汲出し領域における金属溶湯の水素ガス量を低減でき、鋳物の内部品質を向上させることができる。
本発明の実施形態について、図面を参照して詳細に説明する。図1及び図2に示すように、第一実施形態においては、溶湯清浄化装置1を連続処理炉2に用いる場合を例にして説明する。
図2に示すように、溶解炉3で溶解された金属溶湯Yは、汲出し室4内に流入するとともに、開口部13を介して処理筒部10内に流入する。処理筒部10内に流入した金属溶湯Yは、処理筒部10の上部に形成された出口孔15に導かれる。
この際、攪拌部32に形成された放出口(図示省略)から不活性ガスが金属溶湯Y内に放出、分散されるため、金属溶湯Y中に溶存する水素を不活性ガスの気泡中に拡散させつつ、非金属介在物を不活性ガスと金属溶湯Yの界面に付着させて、滓として浮上分離させることができる。
次に、本発明の第二実施形態について説明する。図3は、第二実施形態に係る溶湯清浄化装置及び連続処理炉を示した断面図である。第二実施形態に係る溶湯清浄化装置51は、図3に示すように、処理筒部10に底部19が形成されている点及び回転ローター21を昇降させる昇降手段50を備えている点で第一実施形態と相違する。なお、第一実施形態と共通する部分については同一の符号を付して説明を省略する。
なお、昇降手段50を支持部23に設けて、支持部23が昇降するように形成してもよい。また、昇降手段50は、シリンダに限定されるものではなく、他の形態であっても構わない。
図3に示すように、溶湯清浄化装置51によっても第一実施形態と同様の効果を得ることができる。また、処理筒部10には底部19が形成されているため、仮に比重の大きい非金属介在物が沈降したとしても処理筒部10内に止まり、汲出し室4の底面に堆積することがない。これにより、汲出し室4のメンテナンスを軽減することができる。また、入口孔14を底部19よりも上方に形成することにより、入口孔14から金属溶湯Yが流入する際に、底部19に沈降した非金属介在物を舞い上げることがないため、非金属介在物を沈降させておくことができる。
図4は、第三実施形態に係る溶湯清浄化装置及び坩堝炉を示した断面図である。第一及び第二実施形態では、溶湯清浄化装置を連続処理炉2に設ける場合について説明したが、これに限定されるものではなく、第三実施形態のように坩堝炉82に設けてもよい。
2 連続処理炉
3 溶解炉
4 汲出し室(保持室)
4a 汲出し領域
6 出湯口
10 処理筒部
13 開口部(入口孔)
15 出口孔
17 フィルター
19 底部
20 精製装置
21 回転ローター
22 駆動部
23 支持部
25 ガス供給部
31 シャフト
32 攪拌部
Y 金属溶湯
Claims (11)
- 連続処理炉の金属溶湯を保持する保持室に用いられる溶湯清浄化装置であって、
前記金属溶湯を内部に流入させる入口孔と外部に流出させる出口孔とを備え前記保持室に配置される筒状の処理筒部と、
前記処理筒部内の前記金属溶湯に対して脱ガス処理及び脱滓処理の少なくともいずれか一方を行う精製装置と、を有し、
前記処理筒部の上端は、前記保持室内の金属溶湯の湯面よりも突出していることを特徴とする溶湯清浄化装置。 - 前記保持室は、前記金属溶湯を外部へ汲み出す汲出し室であることを特徴とする請求の範囲第1項に記載の溶湯清浄化装置。
- 金属溶湯を加熱保持する保持炉に用いられる溶湯清浄化装置であって、
前記金属溶湯を内部に流入させる入口孔と外部に流出させる出口孔とを備え前記保持炉に配置される筒状の処理筒部と、
前記処理筒部内の前記金属溶湯に対して脱ガス処理及び脱滓処理の少なくともいずれか一方を行う精製装置と、を有し、
前記処理筒部の上端は、前記保持炉内の金属溶湯の湯面よりも突出していることを特徴とする溶湯清浄化装置。 - 前記保持炉は、坩堝炉であることを特徴とする請求の範囲第3項に記載の溶湯清浄化装置。
- 前記入口孔は、前記出口孔よりも下方に形成されていることを特徴とする請求の範囲第1項又は第3項に記載の溶湯清浄化装置。
- 前記処理筒部の下端に複数の開口部を備え、前記開口部が前記入口孔であることを特徴とする請求の範囲第5項に記載の溶湯清浄化装置。
- 前記処理筒部は、底部を有することを特徴とする請求の範囲第1項又は第3項のいずれか一項に記載の溶湯清浄化装置。
- 前記出口孔にフィルターが形成されていることを特徴とする請求の範囲第1項又は第3項に記載の溶湯清浄化装置。
- 前記精製装置は、
前記金属溶湯中で回転する回転ローターと、
前記回転ローターを駆動させる駆動部と、
前記駆動部を支える支持部と、を有することを特徴とする請求の範囲第1項又は第3項に記載の溶湯清浄化装置。 - 前記回転ローターは、
前記金属溶湯を攪拌する攪拌部と、
前記駆動部の回転を前記攪拌部に伝えるシャフトと、
前記攪拌部の下部に形成され不活性ガスを放出する放出孔と、を有することを特徴とする請求の範囲第9項に記載の溶湯清浄化装置。 - 前記精製装置は、前記シャフトを昇降させる昇降手段を備えていることを特徴とする請求の範囲第10項に記載の溶湯清浄化装置。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2012035357A1 (en) | 2010-09-16 | 2012-03-22 | Brunel University | Apparatus and method for liquid metals treatment |
CN104390467A (zh) * | 2014-10-20 | 2015-03-04 | 何本科 | 一种冶炼接水滤渣槽 |
US10322445B2 (en) | 2014-08-20 | 2019-06-18 | Zen CASSINATH | Device and method for high shear liquid metal treatment |
Families Citing this family (8)
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JP5482356B2 (ja) | 2010-03-25 | 2014-05-07 | 日本電気株式会社 | 情報機器端末 |
CN102312114B (zh) * | 2011-09-28 | 2013-05-01 | 沈阳黎明航空发动机(集团)有限责任公司 | 一种去除真空熔炼合金表面浮渣装置及方法 |
KR102530025B1 (ko) * | 2015-12-17 | 2023-05-04 | 재단법인 포항산업과학연구원 | 용융 금속 정련 장치 |
CN106435233B (zh) * | 2016-11-25 | 2018-03-30 | 辽宁忠旺集团有限公司 | 一种小型铝合金熔炼除气除杂装置 |
KR101890336B1 (ko) * | 2016-12-21 | 2018-08-21 | 주식회사 포스코 | 용융 금속 정련 장치 |
JP6385618B1 (ja) * | 2018-01-17 | 2018-09-05 | 株式会社エンケイメタルズ | アルミ溶解システム及びその運転方法 |
JP6937027B2 (ja) * | 2018-04-20 | 2021-09-22 | 株式会社メイチュー | 金属溶解保持炉 |
WO2021112267A1 (ko) * | 2019-12-02 | 2021-06-10 | 주식회사 포스코 | 용융물 교반 장치 및 방법 |
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JPS5597436A (en) * | 1979-01-20 | 1980-07-24 | Kawasaki Steel Corp | Refining of molten metal in ladle |
JPH0234731A (ja) * | 1988-07-21 | 1990-02-05 | Nittoku Fuaanesu Kk | アルミ溶湯の精製装置 |
JPH10288466A (ja) * | 1997-04-11 | 1998-10-27 | Nippon Rutsubo Kk | アルミニウム溶湯坩堝 |
JPH10332272A (ja) * | 1997-06-03 | 1998-12-15 | Nippon Rutsubo Kk | 坩堝炉を原型とした低融点金属の連続溶解保持装置 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2012035357A1 (en) | 2010-09-16 | 2012-03-22 | Brunel University | Apparatus and method for liquid metals treatment |
US9498820B2 (en) | 2010-09-16 | 2016-11-22 | Brunel University | Apparatus and method for liquid metals treatment |
US10322445B2 (en) | 2014-08-20 | 2019-06-18 | Zen CASSINATH | Device and method for high shear liquid metal treatment |
CN104390467A (zh) * | 2014-10-20 | 2015-03-04 | 何本科 | 一种冶炼接水滤渣槽 |
CN104390467B (zh) * | 2014-10-20 | 2016-07-06 | 何本科 | 一种冶炼接水滤渣槽 |
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CN102149832B (zh) | 2013-11-06 |
CN102149832A (zh) | 2011-08-10 |
KR20110051288A (ko) | 2011-05-17 |
JP5217828B2 (ja) | 2013-06-19 |
JP2010070794A (ja) | 2010-04-02 |
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