U.S. patent application number 13/063383 was filed with the patent office on 2011-10-20 for descaling device.
This patent application is currently assigned to SMS SIEMAG AKTIENGESELLSCHAFT. Invention is credited to Klaus Baumer, Christian Bilgen, Wolfgang Igelhorst, Gunter Muller, Luc Neumann.
Application Number | 20110252616 13/063383 |
Document ID | / |
Family ID | 41667783 |
Filed Date | 2011-10-20 |
United States Patent
Application |
20110252616 |
Kind Code |
A1 |
Neumann; Luc ; et
al. |
October 20, 2011 |
DESCALING DEVICE
Abstract
The invention relates to a descaling device which can be
operated in an optimal manner with respect to the efficiency,
descaling quality, energy and water consumption and is readily
available. The aim of the invention is achieved such that the spray
nozzles (12), which are instrumental in descaling the steel
material (2) in the descaling device (8), are designed as static
nozzles and as dynamic or rotating nozzles. The static nozzles
form, together with the spray bars, pairs of spray bars (13) and
the dynamic or rotating nozzles form, together with spray units,
rows of pairs of spray units (23).
Inventors: |
Neumann; Luc; (Dusseldorf,
DE) ; Bilgen; Christian; (Dusseldorf, DE) ;
Baumer; Klaus; (Kreuztal, DE) ; Muller; Gunter;
(Drolshagen, DE) ; Igelhorst; Wolfgang; (Mulheim
a. d. Ruhr, DE) |
Assignee: |
SMS SIEMAG
AKTIENGESELLSCHAFT
D??sseldorf
DE
|
Family ID: |
41667783 |
Appl. No.: |
13/063383 |
Filed: |
August 31, 2009 |
PCT Filed: |
August 31, 2009 |
PCT NO: |
PCT/EP2009/006278 |
371 Date: |
June 27, 2011 |
Current U.S.
Class: |
29/81.08 |
Current CPC
Class: |
B21B 15/0035 20130101;
B21B 45/08 20130101; Y10T 29/4544 20150115; B21B 45/0278 20130101;
B21B 15/005 20130101 |
Class at
Publication: |
29/81.08 |
International
Class: |
B21B 45/08 20060101
B21B045/08 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 13, 2008 |
DE |
10 2008 047 029.5 |
Claims
1-18. (canceled)
19. A descaling device for a hot steel material deformable along
the production line into long and flat products, comprising a
housing, a transport plane for the steel material; spray nozzles
arranged vertically above and/or below the transport plane and
directed to a surface of the steel material, from which spray
nozzles water emerges under high pressure for descaling the surface
of the steel material in a controlled and/or regulated manner; a
spray beam arranged below the transport line and a spray beam
arranged above the transport line as a spray beam pair or a spray
beam module, the spray nozzles being arranged on the spray beams
and being constructed as static nozzles and as dynamic or rotating
spray nozzles, the spray nozzles being combinable with each other
with respect to the controlled and/or regulated emission of spray
water.
20. The descaling device according to claim 19, wherein the spray
beams are arranged transversely of the transport plane of the steel
material and, together with the static spray nozzles form the spray
beam pair, the dynamic or rotating spray nozzles being arranged in
at least one spray unit arranged above the transport plane and at
least one spray unit arranged below the transport plane, the
respective spray units arranged above and below the transport plane
being mounted to form at least one spray unit row and extend
transversely above and below the transport plane of the steel
material, wherein the two spray unit rows are arranged so as to be
offset opposite each other and form a spray unit row pair.
21. The descaling device according to claim 20, wherein at least
one spray beam pair and at least one spray unit row pair form
several spray zones in a longitudinal extension.
22. The descaling device according to claim 21, and further
comprising means for individually switching the spray zones on and
off.
23. The descaling device according to claim 21, wherein several
spray beam pairs are arranged behind one another in a transport
direction of the steel material.
24. The descaling device according to claim 20, wherein at least
one spray unit row pair is arranged following a first and a second
spray beam pair in a transport direction of the steel material.
25. The descaling device according to claim 20, wherein at least
one spray unit row pair is arranged between a first spray beam pair
and a second spray beam pair.
26. The descaling device according to claim 20, wherein several
spray unit row pairs are arranged behind one another in a transport
direction of the steel material, at least one spray beam pair being
assigned to the spray unit row pairs.
27. The descaling device according to claim 20, wherein at least
unit row pair is arranged in a transport direction of the steel
material and thereafter is arranged at least one spray beam
pair.
28. The descaling device according to claim 20, wherein two spray
beams are always arranged opposite each other and offset relative
to each other to form the spray beam module.
29. The descaling device according to claim 28, wherein each spray
beam module is arranged in the housing so as to be slideable
transversely of a transport direction of the steel material.
30. The descaling device according to claim 28, wherein the spray
beam modules are arranged so as to be replaceable.
31. The descaling device according to claim 30, and further
comprising a travel rail arranged in the housing, the respective
spray unit rows being arranged on and received by the travel rail
as a module.
32. The descaling device according to claim 28, and further
comprising a first device and a second device for squeezing off or
holding back the spray water, each spray beam module being arranged
between the first device and the second device.
33. The descaling device according to claim 31, and further
comprising a first device and a second device for squeezing off or
holding back the spray water, each spray unit row pair being
arranged between the first device and the second device.
34. A descaling device for hot steel material deformable along a
production line into long and flat products, comprising: a housing,
a transport plane for the steel material within the descaling
device; spray nozzles arranged vertically above and below the
transport plane directed onto a surface of the steel material, from
which spray nozzles water emerges under high pressure for descaling
the surface of the steel material in a controlled or regulated
manner; a device arranged on an input side and an output side of
the housing for squeezing off or holding back the spray water
impinging upon the surface of the steel material; spray beams, the
spray nozzles being static nozzles which together with the spray
beams form at least one first and second spray beam module; and
another device for squeezing off or holding back the spray water
impinging upon the surface of the steel material, the another
device being arranged between the first and the second spray beam
modules.
35. A descaling device for hot steel material deformable along a
product line into long and flat products, comprising: a housing, a
transport plane for the steel material within the descaling device;
spray nozzles arranged vertically above and below the transport
plane directed onto a surface of the steel material, from which
spray nozzles water emerges under high pressure for descaling the
surface of the steel material in a controlled or regulated manner;
a device arranged on an input side and an output side of the
housing for squeezing off or holding back the spray water impinging
upon the surface of the steel material; a spray beam, the spray
nozzles including static nozzles which together with spray beam
form at least one spray beam module, and the spray nozzles
including dynamic or rotating nozzles which are arranged in a spray
head of a spray unit, wherein several such spray units are arranged
as a spray unit row above and below as well as transversely of the
transport plane of the steel material and form a spray unit row
module; and another device which for squeezing off or holding back
the spray water impinging upon the surface of the steel material,
the another device being arranged between the spray beam module and
the spray unit row module.
36. The descaling device according to claim 19, wherein the
descaling device is arranged in a one-stand or multiple-stand hot
rolling train formed as a production line, either following a
continuous casting machine or in front of at least one hot rolling
stand.
Description
[0001] The invention relates to a descaling device for hot steel
material deformable along a production line into long and flat
products, in accordance with the features of the preambles of
claims 1, 16 and 17.
[0002] From DE 43 02 331 A1 is known a scale washer whose purpose
is to descale in particular steel strips and thin slabs having
reduced water and energy consumption over the entire strip or slab
width deep into the pores. The object is met by utilizing a
rotating nozzle head having several spray nozzles and preferably
the two upper spray units arranged in the edge area of the rolling
stock are offset relative to the two lower spray units arranged in
the edge region of the rolling stock.
[0003] From DE 43 28 303 C2 is known a device for descaling hot
rolling stock by applying a fluid which is under a high pressure,
particularly water. The water emerges from at least one row of
nozzles with several nozzle heads covering the rolling stock width,
wherein each nozzle head is driven by a motor about an axis of
rotation extending essentially perpendicularly of the surface of
the rolling stock, and wherein each nozzle head has at least two
nozzles arranged eccentrically relative to the axis of rotation.
The nozzles of each nozzle head are arranged at different angles
relative to the axis of rotation in such a way that the spray image
of each nozzle during operation covers in relation to the axis of
rotation a different radial area on the surface of the rolling
stock to be descaled.
[0004] From EP 0 625 383 B1 is additionally known a manufacturing
line for strips and/or sheet metal, in which, among others, as
temperature restoring system is provided an induction furnace with
at least one work frequency for heating the surface and the edges
of the slabs, which is followed by a first descaling device and a
tunnel furnace, and a second descaling device is provided between
the tunnel furnace and the roll chain. The first descaling device
is a low-speed descaling device with rotating nozzles, while the
second descaling device is a high-speed descaling device with
static nozzles.
[0005] Moreover, EP 1 718 424 B1 discloses a device for descaling
hot rolling stock by means of water, in accordance with which at
least one nozzle head row covering the rolling stock width is
provided, and wherein each nozzle head is rotating and has several
nozzles which are arranged near the circumference of the nozzle
head in order to achieve spray images on the rolling stock which
touch or overlap each other and in this way to remove the scale
comparatively better.
[0006] Finally EP 1 077 095 B1 discloses a descaling device for a
continuously cast metal strip which has particularly in the case of
a defect significant advantages, inasmuch as the water catch
channels arranged above the upper side of the metal strip are
pivotable against the strip travel direction independently of the
water spray nozzles assigned to them and are vertically adjustable
and automatically yielding relative to the metal strip, and the
spray beams of the strip upper side receiving the nozzle rows are
freely pivotable by means of a lever arm and, thus, are arranged
within limits so as to be vertically adjustable as well as
automatically yielding.
[0007] The previously known descaling devices have for descaling
the rolling stock either exclusively static nozzles or exclusively
rotating nozzles. Accordingly, it is understandable that the
previously known solutions make it only possible to influence a
limited number of adjusting values, and it is consequently not
possible to react to the product properties of the different long
and flat steel products to be manufactured and to the process
parameters and other target values.
[0008] The invention is based on the object of providing a
descaling device which can be operated in an optimum manner with
respect to its efficiency, the descaling quality, the energy and
water consumption, and which has a high availability.
[0009] In accordance with the invention, this object is met with a
descaling device with the features of claim 1, claim 16 and claim
17.
[0010] In accordance with the characterizing features of claim 1,
the spray nozzles of the descaling device are constructed as static
nozzles and as dynamic or rotating nozzles, and at least a
predeterminable number of spray nozzles can be combined with each
other with respect to their controlled or regulated quantities.
[0011] In another configuration of the invention, a certain number
of static spray nozzles form a pair of spray beams together with a
spray beam arranged above the steel material to be descaled and a
spray beam arranged below the transport plane of steel material to
be descaled, wherein the spray beam pair extends transversely of
the transport plane. In this connection, several such spray beam
pairs can be provided in the descaling device.
[0012] Moreover, in the descaling device, a certain number of
dynamic or rotating spray nozzles are provided, which are arranged
in several spray units arranged above spray units and in several
spray units arranged below the transport plane, at least one spray
unit row which extends transversely of the transport plane, and
wherein always two essentially oppositely located spray unit rows
form a spray unit row pair.
[0013] The at least one spray beam pair as well as the at least one
spray unit row pair can according to the invention along its
longitudinal extension form one or more spray zones to which water
can be admitted as required. Individual spray zones can be switched
on or off through suitable means, for example through adjusting
valves, wherein at least one can be switched to the pressure source
or can be switched off from the pressure source.
[0014] In a further development of the invention, different
arrangement variations of individual spray beam pairs or individual
spray unit row pairs can be present.
[0015] A first arrangement variation provides that, in the
transport direction of the steel material, several spray beam pairs
are arranged one after the other and always between a first spray
beam pair and a second spray beam pair is arranged a device for
squeezing or holding back the spray water impinging on the surface
of the steel material.
[0016] A second arrangement variation provides that in the
transport direction of the steel material at least one spray unit
roll pair is arranged following a first and a second spray beam
pair.
[0017] A third arrangement variation provides that between the
first spray beam pair and the second spray beam pair at least one
spray unit row pair is arranged.
[0018] A fourth arrangement variation provides that in transport
direction of the steel material several spray unit row pairs are
arranged one after the other and to the spray unit row pairs is
assigned at least one spray beam pair.
[0019] A fifth arrangement variation provides that in transport
direction of the steel material at least one spray unit row pair
and after that at least one spray beam pair are arranged.
[0020] In accordance with another further development of the
invention, always two spray beam modules are arranged offset
relative to each other and opposite each other so as to form a
spray beam module which is displaceably or exchangeably received in
the housing of the descaling device transversely of the transport
direction of the steel material.
[0021] Moreover, the respective spray unit rows are arranged on a
travel rail present within the housing transversely of the
transport plane and received in the manner of a module by the
travel rail.
[0022] Furthermore, as already mentioned above, a device for
squeezing off or holding back the spray water is arranged between
always two spray beam pairs and/or between always two spray unit
row pairs.
[0023] In accordance with the features of the preamble of claim 16,
the object on which the invention is based is met by providing
static nozzles as the spray nozzles which together with spray beams
form at least a first and a second spray beam module, and that
between both modules is arranged another device which serves for
squeezing off or holding back the spray water impinging upon the
surface of the steel material.
[0024] According to the features of the preamble of claim 17, the
object of the invention is additionally solved by providing the
spray nozzles as first static nozzles which together with spray
beams form at least one spray beam module, and the spray nozzles
are second dynamic or rotating nozzles which are formed in a nozzle
head of a spray unit, wherein several of such spray units are
arranged in the manner of a row above and below as well as
transversely of the transport plane of the steel material and form
a spray unit roll module, and that between the spray beam module
and the spray unit row module is arranged another device which
servers for squeezing off or holding back the spray water impinging
upon the surface of the steel material to be descaled.
[0025] With respect to the arrangement of the descaling device
within the production line, the latter can be positioned following
a continuous casting machine and/or in a one-stand or
multiple-stand hot rolling train configured as a production line,
namely in front of at least one hot rolling stand.
[0026] Additional features of the invention result from the
following description in which an embodiment of the invention will
be explained in more detail.
[0027] In the drawings:
[0028] FIG. 1 shows the production line of the hot steel material
which is deformable into a long and flat product, with the
arrangement of the descaling device according to the invention
following the continuous casting machine and in front of a two-high
roll stand of a hot rolling train,
[0029] FIG. 2 shows the descaling device in a cross section with a
first and a second spray beam pair, known per se, and
[0030] FIG. 3 shows the descaling device in a cross section with a
spray beam pair and a spray unit row pair.
[0031] FIG. 1 shows a portion of a production line 1 which deforms
a hot steel material 2 into a long and flat product.
[0032] The production line 1 includes a continuous casting machine
3, slab guide means 4, between which the steel material 2 is guided
and transported into a horizontal plane for further processing. A
first step of further processing may be, for example, that the
steel material 2 passes a shear arrangement 5 synchronized with the
casting speed in which the steel material is cut to sections of
predetermined length. As is generally known, arranged in front of
the shear arrangement 5 may be a straightening driver, not
illustrated, which also is synchronized with the casting speed.
Subsequently, for example, each section of the steel material 2
travels through a first descaling device 6 or 8 constructed in
accordance with the invention. Following the first descaling device
6 or 8 may be provided a furnace 7 which raises the temperature of
the steel material to the required temperature after the steel
material 2 has cooled in the area near the surface thereof due to
the spray water.
[0033] After the steel material 2 has passed the furnace 7, a
second descaling device 6 or 8 constructed in accordance with the
present invention may be arranged in front of a roll stand or a hot
rolling train 9 with one or more stands.
[0034] With respect to the use of spray beams for descaling the
steel material 2, FIG. 2 represents an embodiment of a known
descaling device 6, inasmuch as it is known to construct spray
nozzles 12, which are constructed as static nozzles, together with
at least one spray beam 13.1 and 13.2 arranged above the transport
plane 10 of the steel material 2 and at least one spray beam 13.1
and 13.2 arranged below the transport plane 10 of the steel
material 2 to form a spray beam pair 13. This descaling device 6
comprises a housing 14 in which is formed the horizontally
extending transport plane 10 in the rolling direction 15 for the
steel material 2. The transport plane 10 is formed by roller table
rollers 16 arranged within the housing 14 and over the longitudinal
extension thereof and the rollers 17.1 of several devices 17
arranged in the housing 14 which rollers 17.1 are arranged with a
parallel axis to the roller table rollers 16. The respective roller
17.1 of the device 17 serves together with another roller 17.2,
which is arranged vertically and with a parallel axis above the
roller 17.1, for squeezing or holding back the spray water which
has impinged on the surface of the steel material 2.
[0035] As is well known, as also stated in DE 43 02 331 A1 and in
EP 1 077 095 B1, a first device 17 is arranged on the inlet side
and a second device 17 is arranged at the outlet side of the
descaling device 6. Accordingly, such devices 17 are known, so that
it is not necessary to discuss in more detail the constructive
arrangement thereof.
[0036] The descaling device 6 includes additionally a first spray
beam pair 13 and a second spray beam pair 20. The first spray beam
pair 13 consists of the first spray beam 13.1 arranged below the
transport plane 10 and the second spray beam 13.2 arranged above
the transport plane 10. The first spray beam 13.1 is preferably
constructed so as to be stationary, while the second spray beam
13.2 is preferably vertically adjustable. As known per se, each
spray beam 13.1, 13.2 has assigned to it a spray water catch
channel 18 or 19 arranged above the transport plane 10. While the
spray water catch channel 18 assigned to the spray beam 13.1 is
arranged preferably stationary, the spray water catch channel 19,
assigned to the spray beam 13.2 is optionally arranged so as to be
stationary or vertically adjustable. The spray beams 13.1, 13.2
form in the longitudinal extension thereof several spray zones, not
illustrated, extending transversely over the longitudinal extension
above the transport plane 10, wherein the spray zones can be
switched on or off by suitable control means. This achieves an
individual and targeted admission of spray water to the steel
material 2 and simultaneously a reduction of the use of spray water
and electrical energy for operating the spray water pressure source
constructed, for example, as a conveyer pump is desired.
[0037] The second spray beam pair 20 arranged in the descaling
device 6 is identical to the spray beam pair 13 with respect to
configuration and arrangement. Also the assignment of the spray
water catch channels 18, 19 is identical, so that further
discussion in this connection are not necessary.
[0038] Advantageously, in the rolling direction 15 between the
spray beam pair 13 and the spray beam pair 20 is arranged a device
17 for squeezing off or holding back the spray water, wherein the
construction is identical to that of the device 17 arranged on the
input side and the output side of the descaling device 6 and, in
principle, corresponds to that disclosed in EP 1 077 095 B1.
[0039] The spray beam pair 13, 20 arranged in the descaling device
6 is additionally constructed as a spray beam module and is
displaceably and exchangeably arranged in the housing 14 on
suitable means transversely of the transport direction 11 of the
steel material 2.
[0040] Finally, the housing 14 of the descaling device 6 is covered
from above by a hood 21. The purpose of such a hood 21 is
sufficiently described in EP1 077 095 B1, so that further comments
concerning the hood are not necessary.
[0041] FIG. 3 shows a descaling device 8 which differs from the
devices known from the prior art and described in FIG. 2. The
difference resides in that, for descaling the steel material 2,
spray nozzles 12 are used which are constructed as static nozzles
and which form together with at least one spray beam 13.1, 13.2
arranged below the transport plane 10 and at least one spray beam
13.1, 13.2 arranged above the transport plane 10 so as to form a
spray beam pair 13 or a spray beam module, and spray nozzles are
used which are constructed as dynamic or rotating spray nozzles and
which are arranged in several spray units 22 arranged above and
below the transport plane 10. The spray units 22 are constructed so
as to form always at least one spray unit row 22.1, 22.2 which are
located offset opposite each other and transversely above and below
the transport plane 10 of the steel material 2. In this manner, two
such spray unit rows, 22.1, 22.2 form a spray unit row pair 23.
Each spray beam of the spray beam pair 13 and each spray unit row
of the spray unit row pairs 23 can be divided over its longitudinal
extension in several spray zones in order to spray water as needed
and in a targeted manner on the surface of the steel material 2 to
be descaled. For this purpose, suitable means, not shown, are
provided by means of which the spray beam pair 13 and the spray
unit row pair 23 as well as the spray zones of the pairs 13, 23 can
be switched on and off as needed to a pressure source, not
illustrated. In order to be able to react to the different
conditions and requirements to be able to descale with suitable
quality additionally within the housing 14 different arrangement
variations of the at least one spray beam pair 13 and of the at
least one spray unit row pair 23 are conceivable.
[0042] FIG. 3 shows one of the embodiments.
[0043] Following the spray beam pair 13 with the corresponding
spray water catch channel 18, 19 is in this case in the transport
direction 11 or in rolling direction 15 a spray unit row pair 23
with the corresponding spray water catch box 24, 25. Between the
spray beam pair 13 and the spray unit row pair 23 is a device 17
for squeezing off or holding back the spray water, as already
described in connection with FIG. 2. The spray unit rows 22.1, 22.2
and/or the individual spray units 22 are also in this case
constructed in the manner of a module, so that in case of damage
the modules can be replaced without significant problems. The spray
unit row 22.1 arranged below the transport plane 10 can, for
example, be received by a travel rail 26 arranged within the
housing 14, or the spray unit row 22.2 arranged above the transport
plane 10 can be arranged so as to be moveable above the transport
plane 10 at the hood 21.
[0044] The use of two spray nozzles 12 of different construction
and with spray nozzles 12 with different effects for descaling in a
descaling device 8, i.e. static and rotating spray nozzles, results
in an advantageous manner in a surface quality of the steel
material 2 which meets highest requirements and which leads to
lowering of the energy and water consumption. In this way, in the
case of temperature-critical products, for example, during thin
slab rolling or during austenitic rolling, descaling takes place
exclusively by means of the dynamic or rotating spray nozzles, i.e.
by means of the at least one spray unit row pair 23, while during
highest requirements of the surface quality of the steel product 2
the spray unit row pair 23 as well as the spray beam pairs 13 are
switched on.
[0045] The use of differently acting spray nozzles 12 leads in an
advantageous manner to the result that, with the same manner of
operating the spray unit row pair 23 and of the spray beam pair 13,
breaking of the scale can be effected with the first spray beam
pair 13 as seen in the transport direction 10 and the cleaning of
the surface of the steel material 2 from the broken scale can take
place with the second spray unit row pair 23.
LIST OF REFERENCE NUMERALS
[0046] 1. Production line [0047] 2. Steel material [0048] 3.
Casting machine [0049] 4. Slab guide means [0050] 5. Shear
arrangement [0051] 6. Descaling device [0052] 7. Furnace [0053] 8.
Descaling device [0054] 9. Rolling stand [0055] 10. Transport plane
[0056] 11. Transport direction [0057] 12. Spray nozzle [0058] 13.
Spray beam pair [0059] 13.1 Spray beam [0060] 13.2 Spray beam
[0061] 14 Housing [0062] 15 Rolling direction [0063] 16 Roll [0064]
17 Device [0065] 17.1 Roll [0066] 17.2 Roll [0067] 18 Spray water
catch channel [0068] 18 Spray water catch channel [0069] 20 Spray
beam pair [0070] 21 Hood [0071] 22 Spray unit [0072] 22.1 Spray
unit row [0073] 22.2 Spray unit row [0074] 23 Spray unit row pair
[0075] 24 Spray water catch box [0076] 25 Spray water catch box
[0077] 26 Rail
* * * * *