US3789913A - Steam flow control in continuous casting machines with direct spray water cooling - Google Patents

Steam flow control in continuous casting machines with direct spray water cooling Download PDF

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Publication number
US3789913A
US3789913A US00238188A US3789913DA US3789913A US 3789913 A US3789913 A US 3789913A US 00238188 A US00238188 A US 00238188A US 3789913D A US3789913D A US 3789913DA US 3789913 A US3789913 A US 3789913A
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US
United States
Prior art keywords
casting
enclosure
machine
fan
mold
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
US00238188A
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English (en)
Inventor
W Stellmacher
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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
Priority claimed from DE19712117621 external-priority patent/DE2117621C/de
Application filed by Mannesmann AG filed Critical Mannesmann AG
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Publication of US3789913A publication Critical patent/US3789913A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ

Definitions

  • ABSTRACT In a machine for continuous casting, which includes a [30] Foreign Application priority Data mold, a water spray cooling system for the casting and Apt 5 1971 Germany I P 21 17 6215 an enclosure, provided with a suctlon fan near the 10- cation where the casting enters the enclosure, and a 52 US. 01. 164/283 psitined 5 51 Int. Cl 822d 11/12 and dlspcsed prefimbly the Openmg [58] Field of Search" 164/283 89; 34/92, 227 235; the enclosure through which the castmg leaves.
  • the present invention relates to apparatus and equipment for preventing escape of steam from a cooling chamber in a machine for continuous casting, using suction for removing the air-water vapor mixture as it forms in zones of direct cooling.
  • Continuous casting machines operate usually with a mold open at the bottom, and the casting is withdrawn from the bottom opening.
  • the hot strand as withdrawn is cooled directly through spraying of water onto its just solidified outer shell surface.
  • large quantities of water vapor are produced.
  • the water vapor as confined to the chamber is then extracted by means of a fan and discharged through a chimney or the like.
  • the enclosure defining such a cooling chamber may have an entrance opening in its upper wall at or near the bottom opening of the mold where the casting is withdrawn, and the casting enters the chamber through that entrance opening.
  • the enclosure may partially envelope the mold, for the mold to be received by the entrance opening to the cooling chamber. This type of construction will be chosen for casting machines in which the mold oscillates.
  • the enclosure is provided with another opening for passage of the casting out of the cooling chamber. Steam escapes through all these openings.
  • the casting has high temperature throughout its entire extension in the cooling chamber, as the casting solidifies but does not actually cool significantly. Therefor, the passage of such a hot casting intoand/or out of the chamber, presents problems of sealing. Also, in case the mold oscillates up and down, the sealing of the chamber presents additional problems. Thus, it appears that some gaps in the enclosure are inevitable and steam escapes through these gaps in the chamber. Other gaps or openings in the enclosure of the cooling chamber are present, for example, where the spray water supply pipes run through and along the walls, and also there are mounting flaps for the mold. As a consequence, water vapor escapes in thick clouds from these gaps, which is a great nuisance and annoyance for operating personal.
  • the improvement it is suggested to suck the wet air-steam mixture in a relatively high location from the cooling chamber, while relatively dry air is sucked from the chamber at a relatively low point thereof.
  • the upper zone of immediate suction from the chamber should be located near the entrance of the casting to the cooling chamber, as it should be noted that water is sprayed onto the casting right below the bottom of the mold.
  • This upper suction zone includes an opening and a fan leading to a chimney, exhaust pipe or the like terminating outside of the building that houses the casting machine. Proceeding in that manner, it was surprisingly discovered that a fan in the lower opening of the cooling chamber discharges practically dry air which, in fact, could be permitted to flow directly into the machine hall.
  • the lower suction fan does not at all have to have as strong a suction power as the upper one.
  • the lower fan needs to have only thirty percent (30%) or less the suction power of the suction fan as provided near the mold exit.
  • the invention does not just supplement a steam exhaust system by adding another fan.
  • the two strategically located suction fans prevent steam discharge from the cooling chamber at a total suction power that is well below the power needed, for example, for a single fan attempting to suck all of the steam out of the cooling chamber. It is believed that the additional suction equipment near the casting exit controls the pressure inside of the chamber so that an overall inwardly pressure gradient is set up even near the entrance of the casting. Due to such inwardly directed pressure gradient, steam does not discharge through any of the gaps in the chamber.
  • the second fan should be located as close as possible to the opening for the casting where leaving the cooling chamber.
  • Some continuous casting machines provide for a curved path for the casting.
  • the casting leaves the cooling chamber enclosure through a side wall thereof.
  • FIGURE illustrates a section view into a cooling chamber of a continuous casting machine incorporating the preferred embodiment of the invention.
  • FIGURE illustrates a water cooled mold 1 for continuous casting.
  • the charge equipment for the mold is not illustrated and is disposed above the mold as is usual for this kind of machines.
  • a casting 2 is extracted from a bottom opening of the mold. That casting 2 is sprayed with water by means of nozzles 3 covering a span of the casting strand that begins directly below the bottom opening of the mold and extends for some distance therefrom.
  • the casting strand 2 veers by means of guide rollers 9 and into the horizontal direction to facilitate further processing.
  • the enclosure has an upper opening 5 receiving the mold l.
  • the mold 1 may be provided for up-and-down oscillation so that the opening 5 must be sufficiently wide for permitting mold l to oscillate without binding.
  • the enclosure 4 defining the cooling chamber has another opening 6 in one of its sidewalls, and the casting 2 having horizontal direction of propagation thereat passes through that opening and leaves the cooling chamber accordingly. There are gaps in the enclosure walls adjacent mold l as well as between the opening 6 and the casting strand passing through.
  • Reference numeral 7 refers to a suction outlet provided in one of the sidewalls of the chamber 4 and including a suction fan.
  • the outlet 7 with fan connects the interior of the cooling chamber to a chimney or a venting path and pipe system 17.
  • the fan sucks air and steam from the interior of enclosure 4 through that pipe and discharge system.
  • the outlet 7 is disposed particularly close to the upper portion of the casting as it is being subjected to direct spray of cooling water; it is this the region of the strongest steam and water vapor development during operation.
  • a second outlet 8 with fan is provided near the bottom of the cooling chamber, and actually it is provided below the opening 6.
  • the discharge and suction power of that fan in outlet 8 may be considerably below the suction power of the fan in outlet 7.
  • the suction power of the fan in outlet 8 may be only about 30 percent or even less than the suction power of the fan in outlet 7.
  • a machine for continuous casting which includes a mold, a water spray cooling system for the casting as extracted from the bottom of the mold, and an enclosure for the cooling system and for a particular length of the casting as extracted, the improvement comprising:
  • second means disposed to be effective below the zone of spray water cooling for sucking relatively dry air from the enclosure at a lower level.
  • first means includes first fan means disposed adjacent the location where the casting enters the enclosure
  • second means includes second fan means adjacent the location where the casting leaves the enclosure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US00238188A 1971-04-05 1972-03-27 Steam flow control in continuous casting machines with direct spray water cooling Expired - Lifetime US3789913A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712117621 DE2117621C (de) 1971-04-05 Verfahren und Vorrichtung zur Verhinde rung des Auswallens von Dampfschwaden bei Stranggießanlagen

Publications (1)

Publication Number Publication Date
US3789913A true US3789913A (en) 1974-02-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00238188A Expired - Lifetime US3789913A (en) 1971-04-05 1972-03-27 Steam flow control in continuous casting machines with direct spray water cooling

Country Status (4)

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US (1) US3789913A (esLanguage)
DE (1) DE2117621B (esLanguage)
FR (1) FR2131950B1 (esLanguage)
IT (1) IT947139B (esLanguage)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184535A (en) * 1977-07-26 1980-01-22 Fried. Kruff Gesellschaft mit beschrankter Haftung Cooling chamber closure member
CN102049481A (zh) * 2010-09-20 2011-05-11 高毅夫 基于二冷配水量的连铸机蒸汽排出风机节能优化控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3047624C2 (de) * 1980-12-17 1987-01-08 Naučno-proizvodstvennoe ob"edinenie Tulačermet, Tula Vorrichtung zum Wasserabfluß aus der Sekundärkühlzone einer Stranggießanlage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150584A (en) * 1961-09-04 1964-09-29 Svenska Flaektfabriken Ab Air-conditioning arrangement for operating rooms
US3191251A (en) * 1962-08-16 1965-06-29 Olsson Erik Allan Process for treating continuously cast material
US3199160A (en) * 1961-07-26 1965-08-10 United Eng Foundry Co Continuous casting of metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199160A (en) * 1961-07-26 1965-08-10 United Eng Foundry Co Continuous casting of metal
US3150584A (en) * 1961-09-04 1964-09-29 Svenska Flaektfabriken Ab Air-conditioning arrangement for operating rooms
US3191251A (en) * 1962-08-16 1965-06-29 Olsson Erik Allan Process for treating continuously cast material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184535A (en) * 1977-07-26 1980-01-22 Fried. Kruff Gesellschaft mit beschrankter Haftung Cooling chamber closure member
CN102049481A (zh) * 2010-09-20 2011-05-11 高毅夫 基于二冷配水量的连铸机蒸汽排出风机节能优化控制方法

Also Published As

Publication number Publication date
FR2131950A1 (esLanguage) 1972-11-17
IT947139B (it) 1973-05-21
DE2117621B (de) 1972-08-03
FR2131950B1 (esLanguage) 1977-07-15

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