EP0209059A2 - Procédé et dispositif pour entraîner une barre coulée dans une installation de coulée continue - Google Patents

Procédé et dispositif pour entraîner une barre coulée dans une installation de coulée continue Download PDF

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Publication number
EP0209059A2
EP0209059A2 EP86109307A EP86109307A EP0209059A2 EP 0209059 A2 EP0209059 A2 EP 0209059A2 EP 86109307 A EP86109307 A EP 86109307A EP 86109307 A EP86109307 A EP 86109307A EP 0209059 A2 EP0209059 A2 EP 0209059A2
Authority
EP
European Patent Office
Prior art keywords
strand
mold
movement
cast
steel
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.)
Withdrawn
Application number
EP86109307A
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German (de)
English (en)
Other versions
EP0209059A3 (fr
Inventor
Arthur Vaterlaus
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.)
Concast Service Union AG
Original Assignee
Concast Service Union 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
Application filed by Concast Service Union AG filed Critical Concast Service Union AG
Publication of EP0209059A2 publication Critical patent/EP0209059A2/fr
Publication of EP0209059A3 publication Critical patent/EP0209059A3/fr
Withdrawn legal-status Critical Current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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • the invention relates to a method and an apparatus for the continuous casting of steel, in particular for driving a cast strand, the strand being pulled out of a continuous mold and a secondary cooling zone by means of a drive device.
  • drive units are provided in each continuous casting installation, which generally have drive rollers.
  • Driven guide rods are also known as drives as "walking beams".
  • the drive unit is further assigned the task of inserting a starting strand into the mold before the start of casting.
  • the cast strand is pulled out of the mold and from the strand guide with the most uniform possible extraction speed.
  • the bath level in the mold is usually slagged off with the strand at a standstill or moved at a creep speed and solidified by water cooling.
  • the strand is then pulled out of the mold with a slow strand movement.
  • the invention has for its object to eliminate the aforementioned shortcomings.
  • the invention is also intended to enable sequence interruptions of 10 or more minutes, which, according to the prior art, led to casting breaks or loss of quality in the product and damage to the machine.
  • the measures mentioned are intended to increase the productivity and profitability of the plant.
  • the device according to the invention is characterized in that the drive control device is provided with a drive program for predetermined oscillatory movements of the cast strand.
  • the procedure according to the invention and the device according to the invention make it possible to improve the strand quality in the strand interior and on the surface and at the same time to reduce machine wear, in particular the service life of the rolls and the maintenance extension of the roller alignment. This reduces maintenance costs.
  • the reduced machine load by avoiding strand stoppages can lead to a more favorable design of the system. For example, the number of bearings per roll can be reduced.
  • a strand oscillation can also be switched on immediately after a strand breakthrough, in order to shear the so-called run-out bear at a still high strand temperature, for example on a cooling grill, or to roll it in by means of strand guide rollers.
  • the stroke length of the oscillation can be matched to the largest roller spacing and can be, for example, half a roller spacing.
  • the length of the oscillating movement of the cast strand can be adapted approximately to the length of the largest roller spacing in the zone with strand shell support in the sense of a further method step.
  • the stroke length of the oscillation movement can be further optimized if it corresponds to approximately half the average circumference of all rollers in the area of the strand shell support.
  • the oscillation speed of the cast strand can be selected so that the oscillation speed is increased accordingly with a larger roll spacing.
  • an additional Characteristic is proposed to oscillate the cast strand at a speed that corresponds at least to the target casting speed before the interruption of the steel supply. Any speed curve can be selected between the two dead centers of the oscillating movement of the cast strand. With larger slabs, large masses must be accelerated and decelerated during the oscillation movement. It is therefore proposed to oscillate the cast strand with a sinusoidal speed curve or linear speed increase / decrease.
  • the secondary cooling can be kept unchanged.
  • a thin slag preferably with exothermic additives, can be applied to maintain or strengthen the lubrication during the oscillation movement.
  • a position transmitter can continuously measure the movement of the strand end within the mold.
  • a position transmitter is connected to the drive control device. It is particularly advantageous if the top dead center is measured by the bath level control device itself and only a single additional measuring device is necessary for the measurement at bottom dead center.
  • straightening rollers are arranged in front of the horizontal strand outlet to straighten the strand.
  • An oscillating strand passes through these straightening rolls several times in both directions, ie the strand is straightened with every forward movement and bent again with every backward movement.
  • the tensile and compressive forces in the strand movement direction can be reduced during the oscillating movement of the strand and, at the same time, slippage between the drive rollers and the strand can be avoided if drive roller pairs are arranged at several points along the secondary cooling section.
  • FIG. 1 2 is a continuous mold with an oscillation drive 3 in a continuous casting system.
  • a strand 4 is pulled out of a strand guide 7 and the mold 2 with a drive device 6.
  • the mold 2 is fed via a steel feed 10.
  • a bath level measuring device 12, 12 ' e.g. a radioactive radiator / receiver
  • a bath level 13 is measured and automatically maintained at a target bath level by means of an inflow control.
  • a second measuring device 14, 14 ' is arranged at the end of the mold exit side.
  • the bath level 13 in the mold 2 drops with continued strand extraction.
  • the target speed or a slower speed can be preprogrammed for this lowering movement.
  • the drive device 6 is switched from pulling out to pushing back so that the strand moves backwards. This forward and backward movement is now repeated several times, as long as the steel feed 10 is interrupted. An oscillatory movement is thus applied to the strand 4, with two rule the strand surface and the strand guide 7 and the drive rollers 8, 9 a relative movement is generated substantially without interruption.
  • the length of the oscillation movement of the strand 4 can be set to the length of the largest roller spacing 16 of the strand support zone or more.
  • KL represents the length of the mold in the direction of the strand.
  • the stroke length is approximately half the average circumference of the rollers in the area of the strand shell support.
  • the max. Stroke length is therefore 650 mm.
  • the maximum roll spacing for a slab line in the strand support area is usually 400 - 600 mm and half the roll circumference for a roll of 400 nm diameter is 628 mm.
  • the three described stroke parameters are optimally met.
  • a stroke length of 550 mm is sufficient for a stroke of 350 mm.
  • a secondary cooling 17 is reduced or switched off.
  • the secondary cooling 17 during the Os zillation movement according to a predetermined program, for example from the driver to the mold, can be switched off gradually.
  • the oscillation movement of the strand can also be coordinated with the oscillation movement of the mold 2 in order to prevent wear due to scratch marks.
  • the roller pairs can be arranged transversely displaceably in the direction of the arrow 20 within this straightening section 15. This displaceability can play in normal casting operation or can only be released by remote control during a string oscillation.
  • Rollers 25 indicate that the mold can be displaced transversely to the direction of strand movement 50 according to arrow 51 and can adjust itself to the oscillating strand.
  • a first zone connected to the mold can also be arranged displaceably together with the mold.
  • a steel inflow curve as a function of time is shown at 21, for example in the case of an intermediate vessel change.
  • the steel inflow remains interrupted during the time period 22.
  • the steel inflow is shut off in the bend 52 of the curve 21.
  • curve 23 shows the course of the speed of the strand oscillation as a function of time.
  • the strand is initially pulled out for a period of time 24 until it reaches the bottom dead center of its oscillatory movement Has. Then it turns after the curve 23 oscillates with a sinusoidal speed curve along the route 19 (FIG. 1).
  • the speed curve could also be set according to a dashed line 26, 26 '.
  • Fig. 4 the position change of the bath level or the end of the strand in the mold during the oscillation movement is shown in a path-time (t) diagram.
  • t path-time
  • a computer 30 continuously receives a signal 31 from the plug or slide control or the steel inflow control.
  • 32 shows a continuous input of a signal from the bath level measuring devices 12, 14 (FIG. 1) and 33 shows the input of the height of the oscillating mold. If the system is equipped with a breakthrough warning device, which is based, for example, on the mold wall temperature measurement, this signal 34 is also fed to the computer 30.
  • the inputs 35 and 36 are program inputs for the intended drive movement and for the intended cooling of the strand during the oscillating movement.
  • the computer 30 can control the continuous caster in a process-appropriate manner automatically or at the push of a button if the steel supply is interrupted or in the event of a fault.
  • Lines 40-43 are connected to the driving machine 45, the secondary cooling 46, the stopper control 47 and the mold oscillation 48, which are controlled by the computer 30 according to the process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
EP86109307A 1985-07-16 1986-07-08 Procédé et dispositif pour entraíner une barre coulée dans une installation de coulée continue Withdrawn EP0209059A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3077/85 1985-07-16
CH307785 1985-07-16

Publications (2)

Publication Number Publication Date
EP0209059A2 true EP0209059A2 (fr) 1987-01-21
EP0209059A3 EP0209059A3 (fr) 1989-01-25

Family

ID=4248116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109307A Withdrawn EP0209059A3 (fr) 1985-07-16 1986-07-08 Procédé et dispositif pour entraíner une barre coulée dans une installation de coulée continue

Country Status (3)

Country Link
US (1) US4735253A (fr)
EP (1) EP0209059A3 (fr)
JP (1) JPS6221449A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108326247A (zh) * 2011-07-08 2018-07-27 普锐特冶金技术德国有限公司 用于在连铸装置中制造金属长材产品的工艺和设备

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564487A (en) * 1993-12-17 1996-10-15 Ronan Engineering Company Continuous casting mold having radiation source for level measurement
US6198103B1 (en) 1998-03-30 2001-03-06 Ohmart/Vega Corporation Nuclear level sensing gauge using scintillating fiber bundle
US20060138330A1 (en) * 2003-03-28 2006-06-29 Ronan Engineering Company Flexible liquid-filled ionizing radiation scintillator used as a product level detector
US8061239B2 (en) * 2006-07-26 2011-11-22 Channellock, Inc. Rescue tool
US20110168899A1 (en) * 2010-01-13 2011-07-14 Andrew Cheshire Detector assemblies and systems having modular housing configuration
US8426827B2 (en) 2010-02-10 2013-04-23 Vega Grieshaber Kg Automatic gain stabilization and temperature compensation for organic and/or plastic scintillation devices
US9921172B2 (en) 2013-03-13 2018-03-20 Vega Americas, Inc. Segmented fiber nuclear level gauge
KR20180118113A (ko) 2016-01-22 2018-10-30 베가 아메리카스, 인크. 유연한 핵 준위 감지 게이지
US10365381B1 (en) 2016-01-22 2019-07-30 Vega Americas, Inc. Flexible nuclear level sensing gauge

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478808A (en) * 1964-10-08 1969-11-18 Bunker Ramo Method of continuously casting steel
US3521696A (en) * 1967-04-19 1970-07-28 Brun Sensor Systems Inc Continuous casting line speed control
DE1783032C3 (de) * 1968-09-21 1974-01-03 Siemens Ag, 1000 Berlin U. 8000 Muenchen Einrichtung zum Steuern des schrittweisen Ausziehens eines Stranges aus einer horizontalen Stranggießkokille
GB1380582A (en) * 1971-01-19 1975-01-15 Davy Int Ltd Method of continuously casting metal and apparatus therefor
ZA721074B (en) * 1971-02-22 1972-10-25 Concast Ag Method for controlling a continuous casting plant
JPS51151624A (en) * 1975-06-23 1976-12-27 Mitsubishi Heavy Ind Ltd Apparatus for preventing breakout
JPS5229432A (en) * 1975-09-01 1977-03-05 Mitsubishi Heavy Ind Ltd Method of preventing breakout accidents in continuous casting
JPS5928430B2 (ja) * 1980-01-23 1984-07-12 川崎製鉄株式会社 連続鋳造におけるブレ−クアウト防止法
JPS5775276A (en) * 1980-10-29 1982-05-11 Kawasaki Steel Corp Method for shortening top crop in continuous casting
GB2105081B (en) * 1981-08-26 1986-02-05 Davey Lowey Limited Monitor for continous casting apparatus
JPS59218250A (ja) * 1983-05-27 1984-12-08 Daido Steel Co Ltd 連続鋳造用鋳型の振動装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108326247A (zh) * 2011-07-08 2018-07-27 普锐特冶金技术德国有限公司 用于在连铸装置中制造金属长材产品的工艺和设备

Also Published As

Publication number Publication date
EP0209059A3 (fr) 1989-01-25
JPS6221449A (ja) 1987-01-29
US4735253A (en) 1988-04-05

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Inventor name: VATERLAUS, ARTHUR