EP3525949A1 - Vorrichtung und verfahren zum entzundern einer bramme - Google Patents
Vorrichtung und verfahren zum entzundern einer brammeInfo
- Publication number
- EP3525949A1 EP3525949A1 EP17768115.2A EP17768115A EP3525949A1 EP 3525949 A1 EP3525949 A1 EP 3525949A1 EP 17768115 A EP17768115 A EP 17768115A EP 3525949 A1 EP3525949 A1 EP 3525949A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- nozzle
- slab
- collecting container
- descaling
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
Definitions
- the present invention relates to a device for descaling a slab, in particular of steel, and to a corresponding method for operating the device.
- Devices and methods for descaling slabs are basically known in the art, such. B. from DE 199 38 705 A1 or KR 102 45 80 B1. Both documents provide nozzles which are arranged so that they can spray to descalate the underside of a slab this underside with a liquid which is under high pressure. Above the slab to be descaled are in the area of the jet cone of the nozzles
- Collecting container provided for collecting the high-pressure liquid jet of the nozzles when the liquid jet is not (more) on the bottom of the
- nozzles are arranged above the slab for spraying the high-pressure liquid jet on the top of the slab in order to desalt them.
- this high-pressure liquid jet no longer hits the top of the slab because the slab z.
- the high-pressure liquid jet hits unimpeded on parts of the machine in which the device for descaling the slab is mounted, or on their foundations. Due to the high
- Liquid having a component in the conveying direction of the slab is ineffective in view of the desired descaling effect.
- a liquid drainage trough extending transversely to the conveying direction of the slab is provided between the rotor nozzles and the slab to be descaled; this discharge chute is arranged in such a way that, on the one hand, it does not hinder the jets impinging on the surface of the slab with the component against the direction of movement, but on the other hand it obstructs the jets with the directional component in FIG
- the invention is based on the object, a known device for
- High-pressure liquid jets as they are sprayed onto the surface of a slab for descaling, before hitting foundations or
- Machine parts is absorbed. This object is achieved by the device technology by the subject of claim 1. This is characterized in that the
- Collecting container is arranged as far below the nozzle that the slab between the nozzle and the collecting container can be guided and that the collecting container can be filled with a second liquid.
- High pressure means in the context of the present description pressures of up to 400 bar.
- Tinder typically forms on the still-warm surface of a freshly poured cast strand or during hot rolling of the slab to strip or sheet.
- the term slab therefore encloses a cast strand and
- the claimed arrangement of the collecting container and its filling with a second liquid ensures that the energy of a first liquid is absorbed when it is injected high-pressure into the second liquid, if it is not absorbed by the top of the slab, because the slab no longer in the jet cone of the nozzle.
- the high energy of the first liquid is then advantageously absorbed by the second liquid. In this way, the jet of the first fluid is prevented from damaging the foundations, foundation linings or at
- Liquid is not always completely absorbed by the second liquid and the collecting container should be permanently damaged, it can be replaced inexpensively as a wearing part. In any case, this exchange of the collecting container is significantly less expensive than the repair of foundations, foundation linings or other machine parts. Since the present invention provides that the collecting container is filled with a second liquid, the collecting container must be necessarily arranged below the nozzle and be open to the beam cone upwards to prevent leakage of the second liquid. For this reason, the present invention relates exclusively to the descaling of tops of
- the collecting container is then designed in the form of a collecting channel, which is arranged in the jet cones of the plurality of nozzles and open towards the nozzles.
- the second liquid is identical to the first liquid; this saves the provision and handling of the second liquid.
- the opening of the collecting container greater than or equal, but preferably only equal to the diameter of the beam cone of
- the jet cone or the liquid can then enter completely into the interior of the collecting container.
- the collection container is limited to the cross-section and in particular the diameter of the jet cone when entering the collecting container, is
- the device according to the invention comprises a pressure control device for adjusting the pressure of the first liquid discharged from the nozzle. Specifically, that is
- High pressure value is sprayed onto the top of the slab to descaling the top of the slab.
- the pressure control device and in particular the device, may be operated in a low pressure mode in which the liquid leaves the nozzle only with a low pressure value which is less than the high pressure value.
- the low pressure value is less than 30 bar, more preferably less than 10 bar.
- the low pressure mode advantageously allows the sludge to be filled
- Device claimed advantages. Only when the device or the collecting container is filled with the second liquid already before the activation of the high-pressure operating mode can it be ensured that the energy of the first liquid is absorbed by the second liquid in the collecting container during the phase of the high-pressure operating mode if this can not be done by the slag to be descaled.
- Collection container is absorbed by the second liquid, when the end of the slab passes between the nozzle and the collecting container, it is necessary that the collecting container is filled with the second liquid at the latest before the slab leaves the jet cone, ie, before the Trailing edge of the slab enters the jet cone of the nozzle.
- the filling of the collecting container takes place earlier, namely before the
- the second liquid can basically in any way in the
- Collecting container can be introduced.
- the second liquid when it is identical to the first liquid, is injected from the nozzle into the collecting container.
- Combinations with other filling methods are also suitable.
- the nozzle or the device is operated in a low-pressure operating mode, in which the second liquid is injected into the collecting container with a low-pressure value, which is significantly smaller than the high-pressure value. This is because if the pressure is too high, the second fluid will not be in it
- the inventive method provides that the liquid from the nozzle with the high pressure value in the collecting container with the therein
- the term “not yet” refers to the period before the slab in the
- the term “while” being used to refer to the temporal aspects mentioned above.
- the term “so far” means spatial aspects, in particular the term “so far” also means the point where the high-pressure liquid jet is injected beyond the right and left edge of the slab in the collecting container.
- Figure 1 shows the device according to the invention.
- Figure 2 shows the installation of the device according to the invention shows.
- FIG. 1 shows the device 100 according to the invention for descaling a slab 200, in particular made of steel.
- the device comprises a
- Spraying device in the form of a nozzle beam 1 15 with typically a plurality of nozzles 1 10.
- the nozzles are arranged within the beam in a row which extends in Figure 1 into the plane and therefore are not visible in Figure 1.
- the row of nozzles extends transversely to the
- Transport direction of the slab 200 which is indicated in Figure 1 by the arrow to the right.
- the nozzles 1 10 are used for spraying a liquid 130, z. B. water in the form of a jet cone under high pressure on the top of
- Slab 200 to desalt it.
- it can also be a number of rotating jet nozzles extending transversely to the transport direction
- Nozzle bar can be used, this embodiment is not shown pictorially.
- Under high pressure means here by way of example pressures of up to 400 bar.
- the device according to the invention further comprises a collecting container 120, which is typically designed as a collecting channel and also extends substantially perpendicular to the plane of the drawing and thus in the width direction of the slab.
- the collecting container 120 or the collecting channel comprises an opening or, when designed as a collecting channel, an opening gap which is open towards the nozzle for collecting at least part of the liquid 130 ejected from the nozzle 110.
- the liquid is preferably completely through the collecting container collected.
- the collecting container is arranged so far below the nozzle 1 10 that the slab between the nozzle 1 10 and the
- Collection container 120 can be passed. This has the consequence that the ejected from the nozzle 1 10 liquid 130 only in the collection container 120 and is taken up by this, if, as shown in Figure 1, the slab 200 has not yet entered the cone of the liquid.
- the collecting container 120 or the collecting channel is filled with a second liquid, which is typically identical to the first liquid 130 ejected from the nozzle 110.
- a second liquid typically identical to the first liquid 130 ejected from the nozzle 110.
- the collecting container 120 may be damaged over time when too long irradiation with the first liquid; it must therefore be replaced from time to time as a wearing part.
- the apparatus further comprises a pressure control device 140 for adjusting the pressure in the outputted from the nozzle 1 10 first liquid 130.
- a pressure control device 140 for adjusting the pressure in the outputted from the nozzle 1 10 first liquid 130.
- a distinction is a high-pressure mode of the device in which the first liquid is ejected from the nozzle under high pressure on the surface of the slab 200 to desalt.
- the device according to the invention can be operated with the aid of the pressure control device 140 in a low-pressure operating mode.
- the low pressure mode may be used to fill the receiver 120 with the second fluid, in which case the nozzle will deliver the low pressure fluid to the receiver being sprayed.
- the pressure of the liquid must not be too large to prevent the liquid from spilling out of the collecting container.
- Figure 2 shows the device according to the invention, as just explained with reference to Figure 1, in a mounting situation.
- the slab 200 is conveyed in Figure 2 in the direction of arrow from right to left on a roller table.
- two nozzle bars 1 15 each having a plurality of nozzles 1 10 can be seen, wherein the nozzle bars extend perpendicular to the plane of the drawing.
- the openings 125 of the collecting container 120 are each open to the nozzles 1 10 associated with you. The sprayed from the nozzle 1 10 liquid jet therefore hits through the opening 125 into the interior of the
- the slab 200 is still between the nozzle and the collecting container; As a result, the liquid jet ejected from the nozzle 110 hits the surface of the slab 200 to descalate it. At the surface, the liquid is reflected and after reflection from another
- Collection container 150 absorbed or collected.
- Collecting container before or at the latest while the device is being Operating mode is switched, at least partially filled with the liquid. If the collecting container 120 is filled with liquid even before the high-pressure operating mode is activated, this has the advantage that even then
- High-pressure liquid jets from the liquid can be collected in the collecting container, when the high-pressure mode already for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016219830.0A DE102016219830A1 (de) | 2016-10-12 | 2016-10-12 | Vorrichtung und Verfahren zum Entzundern einer Bramme |
| PCT/EP2017/073224 WO2018068985A1 (de) | 2016-10-12 | 2017-09-15 | Vorrichtung und verfahren zum entzundern einer bramme |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3525949A1 true EP3525949A1 (de) | 2019-08-21 |
| EP3525949B1 EP3525949B1 (de) | 2020-07-15 |
Family
ID=59887273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17768115.2A Active EP3525949B1 (de) | 2016-10-12 | 2017-09-15 | Vorrichtung und verfahren zum entzundern einer bramme |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3525949B1 (de) |
| DE (1) | DE102016219830A1 (de) |
| WO (1) | WO2018068985A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0763751B2 (ja) * | 1987-01-24 | 1995-07-12 | 株式会社日立製作所 | 熱間圧延ライン |
| AT399833B (de) | 1993-08-23 | 1995-07-25 | Voest Alpine Ind Anlagen | Walzeinrichtung |
| DE19938705A1 (de) | 1999-08-14 | 2001-02-15 | Sms Demag Ag | Entzunderungsvorrichtung für ein stranggegossenes Metallband |
| KR101024580B1 (ko) | 2008-07-24 | 2011-03-31 | 현대제철 주식회사 | 물 회수장치 |
| CN104056865B (zh) * | 2013-03-19 | 2017-02-22 | 宝山钢铁股份有限公司 | 一种钢板表面处理方法及其装置 |
-
2016
- 2016-10-12 DE DE102016219830.0A patent/DE102016219830A1/de not_active Withdrawn
-
2017
- 2017-09-15 EP EP17768115.2A patent/EP3525949B1/de active Active
- 2017-09-15 WO PCT/EP2017/073224 patent/WO2018068985A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3525949B1 (de) | 2020-07-15 |
| WO2018068985A1 (de) | 2018-04-19 |
| DE102016219830A1 (de) | 2018-04-12 |
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