EP0481380B1 - Apparatus for intensifying cooling in the casting of metal objects - Google Patents

Apparatus for intensifying cooling in the casting of metal objects

Info

Publication number
EP0481380B1
EP0481380B1 EP91117411A EP91117411A EP0481380B1 EP 0481380 B1 EP0481380 B1 EP 0481380B1 EP 91117411 A EP91117411 A EP 91117411A EP 91117411 A EP91117411 A EP 91117411A EP 0481380 B1 EP0481380 B1 EP 0481380B1
Authority
EP
European Patent Office
Prior art keywords
cooler
cooling
cooling agent
guide member
guide
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
Application number
EP91117411A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0481380A1 (en
Inventor
Markku Hermanni Koivisto
Seppo Ilmari Pietilä
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luvata Castform Oy
Original Assignee
Outokumpu Castform Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Outokumpu Castform Oy filed Critical Outokumpu Castform Oy
Publication of EP0481380A1 publication Critical patent/EP0481380A1/en
Application granted granted Critical
Publication of EP0481380B1 publication Critical patent/EP0481380B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14—Plants for continuous casting
    • B22D11/145—Plants for continuous casting for upward casting
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055—Cooling the moulds

Definitions

  • the present invention relates to an apparatus for intensifying cooling in the casting of metal objects, particularly in essentially vertical continuous casting carried out from bottom to top.
  • the cooling of a metal object is normally carried out by using the cooler of figure 1, where the cooling agent is conducted to the bottom part of the cooler through the top, via the inlet located in the vicinity of the outer wall of the cooler. Inside the cooler there is installed an intermediate pipe so that the cooling agent is directed towards its outlet while rising up in the vicinity of the inner wall of the cooler.
  • the molten metal is conducted to a nozzle 1; in the nozzle, at the height 2, there is formed a solidification front, where the molten metal turns solid.
  • the cooling agent is conducted, by means of the intermediate pipe 4, first downwards, through its inlet, to the bottom part of the cooler, and further back up, to the top part of the cooler, to be discharged from the cooler. It is apparent that the heat content discharged from the nozzle 1 is at its highest essentially at the solidification front 2, because metal, in the course of solidification, changes state and thus emits heat according to its temperature in the change of state.
  • the increase in the temperature of the cast wire is observed as a function of time. While casting for instance copper wire at the rate of 6 m/min, the surface temperature of the wire may, after cooling, be over 500°C. Such an increase in the wire temperature generally causes the wire to break, which essentially decreases the operation grade. Reasons for the increase in the temperature are for example the thermal expansion of the lower part in the cooler, which creates a gap in the threading between the nozzle and the cooler. Moreover, a high melting heat capacity at high casting velocities brings about an increase in the temperature of the water surface in the cooler, so that an insulating steam bubble is created on the cooling surface of the cooler.
  • DE-B-2 060 451 describes an apparatus for intensifying cooling in the casting of metal objects, the apparatus having a small diameter channel for leading the cooling fluid downwards to the bottom of the cooler. Furthermore, there is provided small diameter intermediate channel for leading the fluid flow upwards to the outlet of the cooler. At the turning direction point of the fluid flow in the bottom part of the cooler the outer channel and the intermediate channel are connected below the edge of a separating wall between the two concentrical fluid flow channels. In this lower region, the velocity of the fluid flow is decreased because of the larger diameter of the connected channels below the edge of the separating wall. This may lead to steam formation because in particular the lower region of the cooler ist the hottest region.
  • US-3,746,077 discloses a casting apparatus where the lower edge of a separating member between an upleading and downleading fluid channel is rounded.
  • this type of rounding at the turning point does not prevent the decrease of the flowing velocity.
  • the diameter in this bottom part below the turning point is larger than the diameter of the upleading outlet channel, Therefore, turbulences of the fluid flow are created and the fluid velocity is reduced thereby causing the conditions for steam formation.
  • the object of the present invention is to eliminate some of the drawbacks of the prior art and to achieve a new, improved apparatus, which is more secure in operation, so that the cooling, particularly in continuous vertical upward casting, is made efficient also at essentially high casting velocities.
  • the essential novel features of the invention are apparent from the characterising portion of claim 1.
  • the flow path of the cooling agent, flowing in the cooler of a continuous casting machine in casting from bottom to top is changed by means of at least one guide member, particularly at the height defined by the solidification front of the apparatus, so that the cooling, particularly at this height at least, is advantageously intensified. At the same time, this prevents the temperature of the cast object from rising, and consequently the created product from breaking.
  • the guide member or members of the invention can advantageously be placed in the housing of the cooler, and/or in a separating member defining the flow direction of the cooling agent, which enables the flowing of the cooling agent first from the top part of the cooler down to the bottom, and then further back up.
  • these members form channels for guiding the cooling agent to essentially near to the surface to be cooled.
  • the cooling can be intensified, also and essentially as regards the section located above the height defined by the solidification front.
  • the bottom part of the separating member can be provided with the said guide member, for directing the cooling agent in an advantageous fashion towards the surface of the cooler located essentially at the height of the solidification front.
  • a groove in the cooler housing essentially at the height of the solidification front, which groove advantageously expands the cooling surface at this most critical point.
  • the cooling agent is advantageously made to flow past the most critical point as regards vertical continuous casting, so that essentially the total cooling capacity of the cooling agent can be made use of.
  • the cooling agent is advantageously made to flow past the most critical point as regards vertical continuous casting, so that essentially the total cooling capacity of the cooling agent can be made use of.
  • the cooler 11 is arranged around a nozzle 12, so that at least the top part of the nozzle 12 is cooled.
  • the cooling agent such as water
  • the cooling agent flows, in the direction of the arrows of figure 2, first downwards in the space between the outer wall of the cooler 11 and the separating member 14 arranged inside the cooler.
  • the cooling agent is conducted, according to the invention, to the height of the solidification front 15 in the nozzle 12, to an essentially horizontal guide channel 16 provided in the housing of the cooler 11, so that the cooling agent flows to essentially near to the inner surface of the cooler 11.
  • the guide 16 is further connected to another guide channel 17, which is essentially parallel to the vertical inner wall of the cooler 11.
  • the guide channels 16 and 17 bring the cooling agent essentially nearer to the hottest point of the cooler housing, the surface of the cooler housing 11 that is in contact with the cooling agent is also essentially expanded at the hottest point. This brings about a further essential improvement in the cooling power of the cooler 11.
  • the heated cooling agent rises in the space between the inner wall of the cooler 11 and the separating member 14, to be discharged from the cooler 11 via the outlet 18.
  • the number of guide channels 16 and 17 in one cooler 11 may vary depending on the use of the apparatus of the invention, so that there are either one or several of them.
  • the cooler 31 is installed around the top part of the nozzle 32.
  • the cooling agent is fed in through the inlet 33 provided in the top part of the cooler, and the cooling agent flows in the space in between the outer wall of the cooler and the separating member 34 to the bottom part of the cooler 31.
  • at least one guide or aligning member 36 which guides the cooling agent to at least one groove 37 formed in the inner wall of the cooler housing in an essentially perpendicular position.
  • the pressure energy contained in the cooling agent is changed into kinetic energy.
  • the cooling capacity of the cooling agent is improved at the same time as the formation of an insulating steam bed, which would reduce the cooling efficiency, is prevented.
  • the cooling agent heated in the bottom of the cooler essentially at the hottest point thereof, is discharged from the cooler 31 through the outlet 38 provided in the top part of the cooler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Executing Machine-Instructions (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP91117411A 1990-10-17 1991-10-11 Apparatus for intensifying cooling in the casting of metal objects Expired - Lifetime EP0481380B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI905102A FI87894C (fi) 1990-10-17 1990-10-17 Anordning foer att effektivera kylning vid gjutning av ett metallstycke
FI905102 1990-10-17

Publications (2)

Publication Number Publication Date
EP0481380A1 EP0481380A1 (en) 1992-04-22
EP0481380B1 true EP0481380B1 (en) 1996-02-28

Family

ID=8531257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91117411A Expired - Lifetime EP0481380B1 (en) 1990-10-17 1991-10-11 Apparatus for intensifying cooling in the casting of metal objects

Country Status (7)

Country Link
EP (1) EP0481380B1 (fi)
JP (1) JP3276381B2 (fi)
CN (2) CN1046876C (fi)
AT (1) ATE134543T1 (fi)
DE (1) DE69117422T2 (fi)
ES (1) ES2084749T3 (fi)
FI (1) FI87894C (fi)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI90210C (fi) * 1991-11-14 1994-01-10 Outokumpu Castform Oy Laite jäähdytyksen tehostamiseksi metallikappaletta valettaessa
FI112447B (fi) * 1997-04-29 2003-12-15 Outokumpu Oy Menetelmä ja laite metallilankojen, -tankojen ja -putkien valamiseksi ylöspäin
CN100348346C (zh) * 2006-04-20 2007-11-14 陈健美 轻合金半连铸铸造方法及实施该方法的专用装置
CN103103622B (zh) * 2011-11-11 2015-10-21 中国科学院沈阳科学仪器研制中心有限公司 一种可长期在单晶炉设备的高温环境下工作的水冷套
CN109290534B (zh) * 2018-11-21 2020-08-04 徐州诚凯知识产权服务有限公司 一种铜棒制造用结晶器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553921A (en) * 1949-04-12 1951-05-22 Jordan James Fernando Continuous casting apparatus
FI46810C (fi) * 1969-12-15 1973-07-10 Outokumpu Oy Laite tankojen, levyjen, putkien ym. ylöspäin suuntautuvaa valua varte n.
FI46693C (fi) * 1970-05-19 1973-06-11 Outokumpu Oy Laitesovitelma putkien, tankojen, levyjen ym. ylöspäin suuntautuvaa ja tkuvaa valua varten.
JPS5027032A (fi) * 1973-07-12 1975-03-20
JPS6121740A (ja) * 1984-07-09 1986-01-30 井関農機株式会社 籾摺機の脱ぷ検出方法
CN86203074U (zh) * 1986-06-30 1986-12-17 机械工业部上海电缆研究所 上引法连铸结晶器
JPH02182351A (ja) * 1989-01-06 1990-07-17 Kubota Ltd 異径管の引上げ連続鋳造方法

Also Published As

Publication number Publication date
FI87894C (fi) 1993-03-10
ES2084749T3 (es) 1996-05-16
DE69117422T2 (de) 1996-08-08
CN1066365C (zh) 2001-05-30
CN1166392A (zh) 1997-12-03
FI87894B (fi) 1992-11-30
DE69117422D1 (de) 1996-04-04
CN1046876C (zh) 1999-12-01
FI905102A0 (fi) 1990-10-17
ATE134543T1 (de) 1996-03-15
EP0481380A1 (en) 1992-04-22
FI905102A (fi) 1992-04-18
JP3276381B2 (ja) 2002-04-22
CN1060802A (zh) 1992-05-06
JPH04262836A (ja) 1992-09-18

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