EP2627464A1 - Verfahren und anlage zur energieeffizienten erzeugung von stahlwarmband - Google Patents
Verfahren und anlage zur energieeffizienten erzeugung von stahlwarmbandInfo
- Publication number
- EP2627464A1 EP2627464A1 EP11771071.5A EP11771071A EP2627464A1 EP 2627464 A1 EP2627464 A1 EP 2627464A1 EP 11771071 A EP11771071 A EP 11771071A EP 2627464 A1 EP2627464 A1 EP 2627464A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strand
- thickness
- rolling
- guiding device
- casting
- 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
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- 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
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical 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
- B22D11/043—Curved moulds
-
- 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
-
- 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
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- 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
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
- B22D11/1246—Nozzles; Spray heads
-
- 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
-
- 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
- B22D11/142—Plants for continuous casting for curved 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
-
- 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
- B21B45/004—Heating the product
Definitions
- the invention relates to a process for the continuous or semi-continuous production of steel hot strip, which starting from a by a
- Vorwalz No. 1 Vorwalz No. 1 and a corresponding system for
- Continuous rolling when a casting plant is so connected to a rolling mill, that in a mold, the cast strand directly - without separation from the straight cast strand part and without intermediate storage - fed into a rolling mill and rolled there to a desired final thickness So the strand can already be a steel band on the
- String guiding corset means strand guiding device comprising several (usually three to six)
- each guide segment comprises one or more (usually three to ten) pairs of preferably designed as a strand support rollers guide elements.
- the support rollers are rotatable about an axis orthogonal to the transport direction of the strand.
- Guide elements also as static, e.g. skid-shaped
- the strand is not only by the
- Strand guiding device supported, but also by a lower end portion of the mold, which is why you could view the mold as part of the strand guide device.
- the strand exits vertically downward from the mold and is deflected into the horizontal.
- Strand guiding device therefore has a substantially curved over an angular range of 90 ° course.
- the emerging from the strand guide device strand is in the roughing mill (HRM, High-Reduction Mill)
- the resulting intermediate band is heated by a heater and in a
- Finish rolling mill finished rolled.
- the rolling stock has a temperature above its recrystallization temperature during rolling. For steel this is the range above about 750 ° C, usually is rolled at temperatures up to 1200 ° C warm.
- the metal When hot rolling steel, the metal is usually in the austenitic state, where the iron atoms are cubic
- the austenite area of a steel depends on the steel composition, but is usually above 800 ° C.
- the produced steel bands are used for
- controllable solidification coefficients have a
- a steel strip of less than 0, 8 mm thickness can be produced without winding problems, whereby uniform and repeatable mechanical properties can be ensured over the entire width and length of the steel strip.
- Stahlwarmbandgüten is no longer necessary. With such steel heat-tape grades, in which subsequent cold-rolling is still required, the number of rolling stands can be reduced compared to conventional rolling mills.
- Arvedi comprises a continuous rolling mill following a continuous caster with three roughing stands, two strip separators, an induction furnace for
- Cooling section cooled and by means of three underfloor reels to tape rolls with a weight of up to 32 tons
- the underfloor reel is a
- Such a system allows the production of hot strips with a final thickness between 0, 8 and 4 mm in continuous operation.
- steel coils may be produced in semi-continuous operation, however, according to the inventors of low carbon steels in continuous operation, a minimum specific minimum flow rate of about 450 mm * m / min is required to complete every five in the finishing train
- Fertigwalzgerüste be used, for steel grades, which must be cast slower due to specific material properties required, hardly a flow of 400 mm * m / min is achieved.
- intermediate strip Even with volume flows in the range of 400-450 mm * m / min, the use of four finishing stands is questioned or the use of only three finishing stands is indicated.
- Metallurgical length refers to the distance between the pouring area of the mold, specifically between the liquid level of the liquid steel, referred to as the "meniscus", and the end of the mold facing the roughing line
- Strand guiding device between the guide elements or the strand support rollers a partially curved
- a strand support length of 17 m has the consequence that the
- That inner portion of the strand which is still liquid or of doughy swampy consistency, is referred to as
- Liquid sump called.
- a kokillenfernere "Sumpfspitze” of the liquid sump is as the centric
- the temperature of the sump tip therefore corresponds to the solidus temperature of the respective steel grade (typically between 1300 ° C and 1535 ° C.
- EP 0 889 762 B1 proposes, for the endless casting and rolling of hot strip, a volumetric flow rate> 0.487 mm 2 / min (converted to the customary unit mentioned at the beginning:> 487 mm * m / min).
- a casting with such a high Volume flow at a relatively low strand thickness proves to be too fast for many types of steel in order to be able to ensure sufficient production quality.
- Strand guiding device transported strand is always as close to the end of the strand guide device and thus as close to the entrance to the roughing mill.
- the invention is therefore based on the object for a variety of steel grades, cooling parameters and strand thicknesses to find those casting and plant parameters, under which the sump tip of the strand as far as possible far away from the mold, i. as close to the end of the
- Strand guiding device can be kept.
- Casting speed or the strand guiding device passing volume flow may not be too large, since In such a case, a shifting out of the sump tip on the strand guide device beyond and thus bulging and bursting of the strand could take place.
- a process for the continuous or semicontinuous production of steel hot strip which is rolled starting from a strand guided by a strand guiding device in a roughing train to an intermediate belt and subsequently in a finishing train to an end belt, comprises according to the invention the following process steps:
- the emerging from the mold and entering the strand guide strand has a strand thickness between 95 and 110 mm, preferably a strand thickness between 102 and 108 mm, and wherein the strand in the Liquid Core Reduction (LCR) method by means of the subsequent
- Cross-sectional core of the strand to a strand thickness between 60 and 95 mm, preferably to a
- Strand thickness is reduced between 70 and 85 mm
- measured strand end support length between 13 m and 15.5 m, preferably in a range between 13 and 15 m, preferably between 14.2 m and 15 m,
- Strand guiding device corresponds) in a range of 3.8 - 7 m / min.
- Strand guiding device downstream rolling mill has a sufficiently hot cross-sectional core to relatively high energy expenditure and ensuring high
- Rolling passes i. using four roughing stands, preferably in five rolling passes, i. carried out using five roughing stands. While in processes according to the prior art usually a pre-rolling of the strand is carried out in three rolling passes, can by an inventive
- the casting heat still in the strand is optimally utilized. Furthermore, when four or five rolling passes are made, almost independently of the starting thickness of the cast strand, a very narrow thickness range of the intermediate strip (between 3 and 15 mm, preferably between 4 and 10 mm) is achieved, so that one of the roughing mill
- downstream heater e.g. an inductive one
- Thickness range of the intermediate band can be designed.
- the four or five rolling passes taking place in the rough rolling mill take place within a maximum of 80 seconds, preferably within a maximum of 50 seconds.
- the first rolling pass in the rough rolling mill takes no more than 5.7 minutes
- liquid strand takes place.
- the first pass in the roughing mill takes place within a maximum of 4.8 minutes, even at casting speeds in the region of 4 m / min.
- Vorwalz Given only one conditional by the ambient conditions in the form of natural convection and radiation Cooling of the strand is allowed, ie no
- Cooling device is done.
- a reduction of the thickness of the strand by 35-60%, preferably by 40-55% takes place in the roughing mill per rolling pass.
- a temperature loss rate of the intermediate strip emerging from the rough rolling mill is below a maximum of 3 K / m, preferably below a maximum of 2.5 K / m. It would also be conceivable to realize a temperature loss rate ⁇ 2 K / m.
- a heating of the leaked out of the roughing intermediate belt by means of an inductive heating device, preferably in
- Querfelder stiills compiler starting at a temperature above 725 ° C, preferably above 850 ° C to a temperature of at least 1100 ° C, preferably to a temperature above 1180 ° C.
- the passage of time between the first pass and the inlet into the heating device does not exceed 110 seconds for intermediate strip thicknesses of 5-10 mm, preferably not longer than 70 seconds.
- a finish rolling of the heated intermediate strip in the finishing train in four rolling passes, i. using four finishing stands or in five rolling passes, i. using five
- Fertigwalzgerüsten to an end strip with a thickness ⁇ 1.5 mm, preferably ⁇ 1.2 mm.
- inventive method is also a rolling on
- Rolling mill carried out by the five or four finishing mills rolling within a maximum period of 12 seconds, preferably within a maximum period of 8 seconds.
- the strand thickness quasi-static i. shortly after the start of casting or the casting of a casting sequence, as soon as the "front of the head" called, warm
- the strand thickness may be dynamically adjustable, i. is arbitrarily variable during the casting process or during the passage of the strand through the strand guiding device.
- the dynamic setting is then preferably set by the operating team depending on the steel grade and the actual casting speed, if this changes only on a case-by-case basis.
- Thickness reduction is between 0 and 30 mm, preferably between 3 and 20 mm.
- the application of the coolant to the strand takes place by means of an injection device, which can comprise any desired number of spray nozzles.
- an injection device which can comprise any desired number of spray nozzles.
- 3 to 4 liters of coolant per kg of extruded steel are spent, while one for a
- Coolant be spent per kg of extruded steel.
- the ratio of the support roller diameter to the distance between adjacent support rollers, the spray character of the nozzles and the coolant or water temperature is the ratio of the support roller diameter to the distance between adjacent support rollers, the spray character of the nozzles and the coolant or water temperature.
- Speed factor K in particular as a function of the steel grade or the cooling characteristic of the strand.
- a speed factor K lying in the upper region of a corridor region proposed according to the invention can be used, while for slower-to-cool steel grades a velocity factor K lying in the middle or lower region of a corridor region proposed according to the invention
- Casting speed is substantially constant.
- the definition of steady-state plant operation merely serves to delimit against a start-up phase during which the molten steel initially passes through the strand guiding device and during which the casting speed is subject to extraordinary parameters or, on the other hand, also acceleration phases which are possible in the meantime to increase throughput and / or operationally required deceleration phases (if you have to wait for the delivery of liquid steel or because of strand quality, lack of cooling water, ).
- Strand support length L 16.5 m in a corridor range from 36450 to 42950, preferably in a corridor range from 39700 to 42950, wherein for determining
- Speed factor K at a strand support length L of 13 m in a corridor range from 26350 to 32359, preferably in a corridor range from 29350 to 32359, while the velocity factor K at a strand support length
- the detailed / refined choice of the speed factor is in addition to the strand support length in particular from Carbon content of the cast steel, whose solidification ⁇ or Umwandlungs decisionisitik whose strength or
- proposed speed factors K allows optimal utilization of the casting heat contained in the strand for the subsequent rolling process and an optimization of the material throughput and thus a productivity advantage (with operational decrease of the casting speed, the strand thickness can be increased and thereby the material throughput can be increased).
- Claim 19 is directed to a system for carrying out the method according to the invention for the continuous or semi-continuous production of steel hot strip, comprising a casting machine with a mold, a downstream of this strand guide device, one of these downstream
- a finishing train wherein the strand guiding device comprises a lower series of guide elements and a parallel or converging arranged upper series of guide elements and between the two guide elements series for receiving the strand emerging from the casting strand provided receiving shaft is formed, which by forming different distances opposite guide elements is tapered to each other at least in sections in the transport direction of the strand and thereby the strand is Dickenreduzierbar.
- the clear receiving width of the receiving shaft is at its input to the mold inlet area between 95 and 110 mm, preferably between 102 and 108 mm, that of
- Pre-rolling mill comprises four or five roughing stands.
- Cooling device however, a thermal cover is provided, which provided for the transport of the strand
- Conveyor at least partially surrounds and thus delays cooling of the strand.
- a strand thickness of 4 to 10 mm can be generated.
- the Heating device is designed as an inductive transverse field heating furnace, by means of which the strand, starting at a temperature above 725 ° C, preferably above 850 ° C to a temperature of at least 1100 ° C, preferably to a temperature above 1180 ° C.
- Prefabricated rolling mill comprises four or five finishing mills, by means of which an intermediate strip emerging from the rough rolling mill can be reduced to an end strip with a thickness of ⁇ 1.5 mm, preferably ⁇ 1.2 mm.
- Prefabricated rolling stands each at intervals of ⁇ 7 m, preferably at intervals of ⁇ 5 m are arranged to each other, the distances between the working rolling axes of the finishing mills are measured.
- Thickness reduction of the strand certain guide elements (gap) are adjustable and thus a light
- the strand thickness or the clear receiving width is adjustable depending on the material of the strand and / or the casting speed.
- adjustable guide elements in one of the mold facing the front half, preferably in one of Mold facing front quarter of the longitudinal extension of the strand guide device are arranged.
- Vorwalzgerüstes the roughing mill is arranged a maximum of 7 m, preferably a maximum of 5 m after the end of the strand guiding device.
- an inlet end of the heating device facing the rough rolling mill is a maximum of 25 m, preferably a maximum of 19 m, after the
- Fig.l is a schematic representation of an inventive system for continuous or semi-continuous production of steel hot strip in side view
- FIG. 2 shows a detailed representation of a strand guiding device of the system from FIG. 1 in a vertical sectional view
- Fig.l shows schematically a plant 1, by means of which a method according to the invention for the continuous or semi-continuous production of steel hot strip is feasible.
- Mold 2 are cast in the strands 3, which is a
- the mold 2 is preceded by a pan 39, which feeds a distributor 40 with liquid steel via a ceramic inlet nozzle.
- the distributor 40 subsequently charges the mold 2, to which a strand guiding device 6 adjoins.
- the system 1 further comprises a number of components such as Entzu matters Anlagenen 41, 42 and in Fig.l not shown separating means, which substantially correspond to the prior art and which is therefore not discussed here at this point.
- the severing devices for example in the form of high-speed shears, can be arranged at any position of the plant 1, in particular between the rough rolling mill 4 and the finishing train 5 and / or in a downstream region of the finishing train 5.
- the heater 7 is in the present embodiment as an induction furnace
- a transverse field heating induction furnace is used, which the plant 1 particularly
- the heater 7 could also as
- conventional oven e.g. be performed with flame treatment, or as a mixing furnace, consisting of HC fuel-fired and inductive segments.
- the intermediate band 3 ' is relatively uniform over the cross section to a desired
- Inlet temperature for the inlet brought into the finishing train 5 wherein the inlet temperature usually depending on the steel grade and subsequent rolling in the
- Finishing mill 5 is between 1000 ° C and 1200 ° C.
- a strand 3 is used with a casting plant 2 (in FIGS. 1-3, a mold of the casting plant is shown)
- Strand 3 is added in the liquid core reduction (LCR) process by means of strand guiding device 6
- liquid cross-sectional core to a strand thickness d between 60 and 95 mm, preferably reduced to a strand thickness d between 70 and 85 mm.
- measured strand support length L is less than or equal to 16.5 m and greater than or equal to 10 m, namely between 12 m and 15.5 m.
- the meniscus 13, which can be seen in detail in FIG. 3, is located i.d.R. a few centimeters below the upper edge 38 of the usually made of copper mold 2.
- the strand support length L is in this case between the meniscus 13 of the mold or the casting plant 2 and the axis of the last, a Vorwalz Sounds 4 facing support roller and described in more detail below upper guide elements series 10 (viewed in a side view of Appendix 1 to the Axes of the roles parallel viewing direction according to
- the strand support length L is at a relative to the center of the radius of curvature of the
- Strand support length L is in Fig.2 a concentric to the strand support length L auxiliary dimension line L 'located.
- a casting speed of the strand 3 measured during a steady-state continuous operation of the strand 3 (which essentially also corresponds to the speed of the strand 3 when passing through the strand guiding device 6, ie also the speed of the strand 3 at the end 14 of FIG
- Strand guiding device 6 corresponds), in a range of 3.8 - 7 m / min, preferably in a range of 4.2 - 6.6 m / min. A combination of these parameters ensures that a swamp tip of the strand 3 defined at the beginning is independent of the material quality-dependent
- Maximalg chip york always approaches to relatively close to the end of the strand guide device and thereby the strand 3 with relatively little energy and while ensuring high quality manufacturing to a desired intermediate thickness before and subsequently can also be finish-rolled.
- the strand support length L is less than or equal to 15.5 m, preferably is the
- Strand support length L in a range between 13 and 15 m.
- the strand support length L is at least 12 m, preferably at least 13 m.
- Roll passes are made within a maximum of 80 seconds, preferably within a maximum of 50 seconds.
- the first rolling pass in the rough rolling mill 4 within a maximum of 5.7 minutes, preferably within a maximum of 5.3 minutes from
- the surface of the strand 3 has in this area on average a temperature> 1050 ° C, preferably> 1000 ° C.
- Conveying device at least in sections.
- the thermal cover can surround the conveying device from above and / or from below and / or laterally.
- a temperature loss rate of the intermediate strip 3 'emerging from the roughing train 4 is below a maximum of 3 K / m, preferably below a maximum of 2.5 K / m. Conceivable would be a realization of
- Temperature loss rate is due to heat radiation and / or convection from the intermediate band and can be controlled by an appropriate choice of thermal boundary conditions (covers, tunnels, cold air, humidity, ...) and transport speed or mass flow.
- Transverse field heating method starting at a temperature above 725 ° C, preferably above 850 ° C,
- the heating of the intermediate strip 3 'takes place within a period of 4 to 30 seconds, preferably within a period of 5 to 15 seconds.
- Strand guiding device 6 80 mm thick strand 3, which in the roughing mill 4 to an intermediate band 3 'with a thickness is reduced by 5 mm, after 260 seconds at the latest, preferably after at the latest 245 seconds from exiting the mold 2 is introduced into the inductive heating device 7 and that when exiting the
- Strand guiding device 6 95 mm thick strand 3, which is reduced in the roughing mill 4 to an intermediate strip 3 'with a thickness of 5.5 mm, at the latest after 390 seconds, preferably after at the latest 335 seconds from the mold 2 exiting into the inductive heating device 7 is introduced.
- Prefabricated rolling train 5 is preferably carried out in four rolling passes, ie using four finishing stands 5i, 5 2 , 5 3 , 5 4 or in five rolling passes, ie using five
- a method according to the invention is also a rolling
- the finish rolling stands 5i, 5 2 , 53, 5 4 , 5s are arranged at intervals of ⁇ 7 m, preferably at intervals of ⁇ 5 m to each other (measured between the
- rolling passes taken within a maximum of 12 seconds, preferably within a maximum of 8 seconds.
- the end band 3 is subsequently cooled to a reel temperature between 500 ° C. and 750 ° C., preferably to 550 ° C. and 650 ° C., and wound up into a bundle.
- the end band 3 'or the intermediate band 3' or the strand 3 is cut through in a direction transverse to its transport direction 15 Direction and a ready reeling of the rolling mill side loose end band 3 '.
- rewinding would also be a
- Each guide element of the lower guide element series 9 is an opposite guide element of the upper
- Guide elements series 10 assigned.
- the guide elements are thus arranged in pairs on both sides of the broad sides of the strand 3.
- the guide elements 9, 10 are designed as rotatably mounted support rollers.
- the upper and lower courtssetti- or support roller series 9, 10 can each turn in (sub-) series
- the guide elements of the upper guide elements series 10 are selectively depth adjustable or can be connected to the
- Guide elements of the lower guide elements series 9 can be approximated.
- Strand guiding device 6 may e.g. by means of a
- clear receiving width 12 of the receiving shaft 11 of the strand guiding device 6 measured opposite upper and lower guide elements could e.g. be reduced from 100 mm to a range between 70 and 90 mm.
- the strand 3 e.g. three to eight guide elements (pairs) of one of the mold 2 facing - but not necessarily adjoining the mold 2 - first guide segment 16 'adjustable.
- several juxtaposed guide segments 16 can be used for LCR thickness reduction, which connect directly or indirectly to the mold.
- the strand thickness d or the clear receiving width 12 is dependent on the material of the strand 3 and / or in
- Adjustment of the respective guide elements 9, 10 takes place in a direction substantially orthogonal to the transport direction of the strand extending direction, wherein both the upper
- Guide elements 10 and the lower guide elements 9 can be adjustable. As can be seen in Figure 3, upper guide elements 10 are hinged to corresponding support members 17, which are preferably hydraulically adjustable.
- the (hydraulically) adjustable LCR guide elements 9, 10 are preferably in one of the mold 2 facing the front half, preferably in a mold 2 facing the front quarter of the longitudinal extent of
- Strand guiding device 6 is arranged.
- Pickup width 12 may be quasi-static, i.
- Strand guiding device 6 as often as desired, using a explained below with reference to Figure 7 relationship as a guideline, changed.
- Thicknesses are readable.
- the casting speed in the unit [m / min] is plotted on the ordinate a material-specific solidification factor k, which carries the unit [mm / Vmin].
- the solidification factor k is between 24-27 mm / Vmin, preferably between 25 and 26 mm / Vmin.
- a solidification factor k of 25.5 mm / Vmin is shown as a horizontal line, which intersects three lines 21, 22, 23.
- Line 21 denotes a strand of 80 mm strand thickness
- line 22 a strand of 55 mm strand thickness
- line 23 a strand of 70 mm strand thickness. It should be noted that these lines are only valid for strands which are in a strand support device 6 with specific
- a maximum casting speed of 6.8 m / min can be selected. Although the actual casting speed used to ensure a flawless manufacturing process below, but not above this value, otherwise the bottom tip of the strand in the transport direction 15 through the end 14 of the strand support device 6 and des
- Receiving shaft 11 would go out and a bursting of the strand would be feared.
- FIG. 5 shows a diagram with abscissa and ordinate scales corresponding to FIG. 4, but for strands which are in accordance with the invention in a strand support device 6 proposed, in metallurgical terms particularly advantageous strand support length L of 15.25 m to be poured.
- Casting characteristics are chosen purely by way of example and should not be understood as limiting. In principle, there is no fixed speed value for each strand thickness, but always a corresponding velocity range under which the casting process can be reasonably conducted. Likewise, the strand support length L is not limited to a certain value such as e.g. 15.25 m according to Figure 4, but the calculations and considerations of the inventors have shown that
- Strand support lengths L in the range between 12 and 16.5 m already allow significant advantages over known systems.
- a purely in FIG. 6 drawn by way of example horizontal cutting line corresponds to a maximum casting speed of 6.25 m / min.
- a section of this horizontal line of intersection with line 30 results in an intersection 30 ', which results in vertical projection on the abscissa that at casting speeds of 6.25 m / min, a strand support length L of about 15.3 m would be optimal to the sump tip of Stranges close to the end 14 of the strand guide device to hold.
- Strand support length L of 15.3 m maximum casting speeds of 6.25 m / min are feasible.
- Figure 7 illustrates the relationship of the strand thickness d with the casting speed v c , wherein a setting of
- Speed factors K can be determined.
- the following information refers to a stationary continuous operation of the plant, as used herein operating phases with a duration> 10 minutes during which the casting speed v c (as opposed to, for example, a gating phase) remains substantially constant.
- Strand support length L in particular depending on the C content of the cast steels or on their cooling characteristics.
- Fast-setting steel grades allow the system to operate at relatively high casting speeds v c , while lower casting speeds v c are to be selected for slower-setting steel grades in order to prevent bulging and bursting of the strand in the area of the swamp tip.
- the following tables refer to strands cast steel grades that are "hard” to cool, ie quickly solidify and the
- a strand support length-specific corridor range is determined by one of the following tables
- the choice of the speed factor K is dependent on the Strandstützin L and the steel grade, in particular the carbon content of the cast steels whose solidification or conversion characteristics, the strength or
- a coolant preferably in the region of the strand guiding device 6 (between the lower end of the mold 2 and the end 14 of the strand guiding device 6 facing the rough rolling line 4), is preferably used Water, upset.
- An injection device comprising any number of spray nozzles arranged in any desired configuration (e.g., behind and / or beside and / or between the guide elements 9, 10)
- Spraying device and the strand guiding device 6 Under selected example, essentially the same
- Design and boundary conditions of the sprayer and the strand guide device 6 could be applied for realizing a hard cooling 3 to 4 liters, to realize a medium-hard cooling 2 to 3 liters and to realize a soft cooling 1 to 2 liters of coolant per kg of extruded steel.
- the speed factor K at a preferably minimum strand support length Lmi n of 13 m in a corridor range from 30,000 to 35,200, preferably in a corridor range from 32500 to 35200, during the Speed factor K at a preferably maximum strand support length L max of 16.5 m in a corridor range of 38000 to 44650, preferably in a corridor range from 41000 to 44650.
- Fig. 7 is a diagram showing the above
- Velocity factors K corresponding characteristic curves 32- 37. On the abscissa of the diagram is the (at the end of the
- Pre-rolling line 4 strand thickness d in the unit [mm], on the ordinate the casting speed in the unit [m / min].
- Strand support lengths L 16.5 m the characteristic 35. The uppermost, for a specific strand support length L
- characteristic 32 corresponds to one
- Strand support length L applicable characteristics (for
- the grades 36 and 37 corresponding steel grades are not so "hard” due to their slower solidification, that is, not as fast to cool as one of the characteristic 35th
- the grades 33 and 34 corresponding steel grades are not as cool as a corresponding characteristic 32 steel grade.
- the cooling rate significantly determines the position of the sump tip within the strand 3.
- Casting speed ranges are to be avoided in order to avoid
- the characteristics 32-37 represent limit casting speed curves for
- the strand thickness d must be correspondingly reduced in order to reduce the risk of buckling of the casting
- these may be, for example, irregularities in the area of the slide or mold, in particular at the bath level of the mold or deviations in the line temperature from predetermined values, detected by sensors.
- a change in the strand thickness d can be effected by a previously described dynamic LCR thickness reduction by means of the LCR guide segment 16 '.
- Casting speed v c starting from a desired strand thickness d a corresponding target casting speed v c can be selected or it can be based on a
- the strand thickness d can be increased as the casting speed v c decreases, thereby increasing the material throughput and thus
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11771071.5A EP2627464B1 (de) | 2010-10-12 | 2011-10-11 | Verfahren und anlage zur energieeffizienten erzeugung von stahlwarmband |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10187232A EP2441540A1 (de) | 2010-10-12 | 2010-10-12 | Verfahren und Anlage zur energieeffizienten Erzeugung von Stahlwarmband |
EP11771071.5A EP2627464B1 (de) | 2010-10-12 | 2011-10-11 | Verfahren und anlage zur energieeffizienten erzeugung von stahlwarmband |
PCT/EP2011/067670 WO2012049135A1 (de) | 2010-10-12 | 2011-10-11 | Verfahren und anlage zur energieeffizienten erzeugung von stahlwarmband |
Publications (2)
Publication Number | Publication Date |
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EP2627464A1 true EP2627464A1 (de) | 2013-08-21 |
EP2627464B1 EP2627464B1 (de) | 2016-03-23 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP10187232A Withdrawn EP2441540A1 (de) | 2010-10-12 | 2010-10-12 | Verfahren und Anlage zur energieeffizienten Erzeugung von Stahlwarmband |
EP11771071.5A Not-in-force EP2627464B1 (de) | 2010-10-12 | 2011-10-11 | Verfahren und anlage zur energieeffizienten erzeugung von stahlwarmband |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP10187232A Withdrawn EP2441540A1 (de) | 2010-10-12 | 2010-10-12 | Verfahren und Anlage zur energieeffizienten Erzeugung von Stahlwarmband |
Country Status (7)
Country | Link |
---|---|
US (1) | US9296027B2 (de) |
EP (2) | EP2441540A1 (de) |
KR (1) | KR101809108B1 (de) |
CN (1) | CN103228377B (de) |
BR (1) | BR112013008766A2 (de) |
RU (1) | RU2579723C2 (de) |
WO (1) | WO2012049135A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2441540A1 (de) | 2010-10-12 | 2012-04-18 | Siemens VAI Metals Technologies GmbH | Verfahren und Anlage zur energieeffizienten Erzeugung von Stahlwarmband |
EP2441539A1 (de) | 2010-10-12 | 2012-04-18 | Siemens VAI Metals Technologies GmbH | Energie- und ausbringungsoptimiertes Verfahren und Anlage zur Erzeugung von Stahlwarmband |
DE102013214939A1 (de) * | 2013-07-30 | 2015-02-05 | Sms Siemag Ag | Gießwalzanlage zum Herstellen von Metallbändern |
US9725780B2 (en) | 2014-06-13 | 2017-08-08 | M3 Steel Tech | Modular micro mill and method of manufacturing a steel long product |
JP6263094B2 (ja) * | 2014-06-30 | 2018-01-17 | 新日鉄住金エンジニアリング株式会社 | 連続鋳片加熱装置の芯出し用ゲージ及び芯出し方法 |
US10543527B2 (en) | 2014-12-24 | 2020-01-28 | Jfe Steel Corporation | Continuous steel casting method |
DE102015216512A1 (de) * | 2015-08-28 | 2017-03-02 | Sms Group Gmbh | Anlage nach dem CSP-Konzept sowie Verfahren zum Betreiben einer solchen Anlage |
CN105665662B (zh) * | 2016-03-09 | 2017-08-08 | 日照宝华新材料有限公司 | 基于esp线的药芯焊丝用钢制造方法 |
CN205659983U (zh) * | 2016-06-15 | 2016-10-26 | 日照宝华新材料有限公司 | 一种esp生产线用长公里数轧制辊 |
EP3338914A1 (de) * | 2016-12-22 | 2018-06-27 | Primetals Technologies Austria GmbH | Verfahren zur endlosen herstellung eines aufgewickelten warmbands in einer giess-walz-verbundanlage, verfahren zum anfahren einer giess-walz-verbundanlage und giess-walz-verbundanlage |
IT201700067508A1 (it) | 2017-06-16 | 2018-12-16 | Danieli Off Mecc | Metodo di colata continua e relativo apparato |
CN107597845B (zh) * | 2017-10-16 | 2023-08-11 | 北京科技大学 | 无头连铸连轧超深冲用超低碳钢卷铁素体轧制方法和装置 |
CN107597844A (zh) * | 2017-10-16 | 2018-01-19 | 北京科技大学 | 无头连铸连轧深冲用低微碳钢卷的铁素体轧制方法和装置 |
EP4122612A1 (de) * | 2021-07-23 | 2023-01-25 | Primetals Technologies Japan, Ltd. | Sexto-walzanlagengerüst und fertigwalzstrasse zum warmwalzen eines mittleren bandes in ein dünnes band |
CN115351082A (zh) * | 2022-08-24 | 2022-11-18 | 中冶赛迪工程技术股份有限公司 | 一种连续热轧超薄低碳带钢的方法及生产线 |
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US4335780A (en) * | 1980-03-27 | 1982-06-22 | Max Burkhard | Continuous casting plant |
US4872946A (en) * | 1987-02-23 | 1989-10-10 | Fuji Photo Film Co., Ltd. | Method of manufacturing supports for lithographic printing plate |
IT1224318B (it) | 1988-05-26 | 1990-10-04 | Mannesmann Ag | Processo ed impianto per la produzione continua di nastro di acciaio |
SE464437B (sv) * | 1989-08-25 | 1991-04-22 | Ericsson Telefon Ab L M | Metod i en mogilradiomottagare foer att reducera mottagarens effektbehov |
CN1038190C (zh) | 1994-09-30 | 1998-04-29 | 吴学仁 | 无公害低摩擦系数合成闸瓦的制造方法及其产品 |
DE19529049C1 (de) | 1995-07-31 | 1997-03-20 | Mannesmann Ag | Hochgeschwindigkeits-Dünnbrammenanlage |
DE19613718C1 (de) * | 1996-03-28 | 1997-10-23 | Mannesmann Ag | Verfahren und Anlage zur Herstellung von warmgewalztem Stahlband |
DE19639302C2 (de) * | 1996-09-25 | 2000-02-24 | Schloemann Siemag Ag | Verfahren und Vorrichtung zur Erzeugung von dünnen Brammen auf einer Stranggießanlage |
DE19900405A1 (de) | 1999-01-08 | 2000-07-13 | Bosch Gmbh Robert | Verfahren zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils |
EP1059125A3 (de) * | 1999-06-08 | 2003-01-15 | SMS Demag AG | Verfahren zum Herstellen von Metallband |
DE10025080A1 (de) * | 1999-06-08 | 2001-05-17 | Sms Demag Ag | Verfahren zum Herstellen von Metallband |
DE10203711A1 (de) | 2002-01-31 | 2003-08-14 | Sms Demag Ag | Verfahren und Anlage zur Herstellung von Warmband aus austenitischen nichtrostenden Stählen |
CN1840252A (zh) | 2005-03-28 | 2006-10-04 | 鞍钢集团新钢铁有限责任公司 | 中厚板坯连铸连轧板卷的生产工艺 |
US7832460B2 (en) | 2005-04-07 | 2010-11-16 | Giovanni Arvedi | Process and system for manufacturing metal strips and sheets without discontinuity between continuous casting and rolling |
ITRM20050523A1 (it) * | 2005-10-21 | 2007-04-22 | Danieli Off Mecc | Processo e impianto per la produzione di nastro metallico. |
AT504782B1 (de) | 2005-11-09 | 2008-08-15 | Siemens Vai Metals Tech Gmbh | Verfahren zur herstellung eines warmgewalzten stahlbandes und kombinierte giess- und walzanlage zur durchführung des verfahrens |
CN101336307A (zh) * | 2006-01-26 | 2008-12-31 | 乔瓦尼·阿尔维迪 | 具有冷轧带材特性的热轧双相钢带材 |
DE102007058709A1 (de) | 2007-08-04 | 2009-02-05 | Sms Demag Ag | Verfahren zum Herstellen eines Bandes aus Stahl |
EP2441540A1 (de) | 2010-10-12 | 2012-04-18 | Siemens VAI Metals Technologies GmbH | Verfahren und Anlage zur energieeffizienten Erzeugung von Stahlwarmband |
EP2441539A1 (de) | 2010-10-12 | 2012-04-18 | Siemens VAI Metals Technologies GmbH | Energie- und ausbringungsoptimiertes Verfahren und Anlage zur Erzeugung von Stahlwarmband |
-
2010
- 2010-10-12 EP EP10187232A patent/EP2441540A1/de not_active Withdrawn
-
2011
- 2011-10-11 KR KR1020137012335A patent/KR101809108B1/ko active IP Right Grant
- 2011-10-11 RU RU2013121553/02A patent/RU2579723C2/ru not_active IP Right Cessation
- 2011-10-11 CN CN201180049441.5A patent/CN103228377B/zh not_active Expired - Fee Related
- 2011-10-11 BR BR112013008766A patent/BR112013008766A2/pt not_active IP Right Cessation
- 2011-10-11 US US13/877,876 patent/US9296027B2/en not_active Expired - Fee Related
- 2011-10-11 EP EP11771071.5A patent/EP2627464B1/de not_active Not-in-force
- 2011-10-11 WO PCT/EP2011/067670 patent/WO2012049135A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012049135A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012049135A1 (de) | 2012-04-19 |
EP2627464B1 (de) | 2016-03-23 |
RU2579723C2 (ru) | 2016-04-10 |
CN103228377A (zh) | 2013-07-31 |
US9296027B2 (en) | 2016-03-29 |
KR101809108B1 (ko) | 2018-01-18 |
BR112013008766A2 (pt) | 2019-09-24 |
US20130192790A1 (en) | 2013-08-01 |
CN103228377B (zh) | 2015-06-03 |
EP2441540A1 (de) | 2012-04-18 |
RU2013121553A (ru) | 2014-11-20 |
KR20130109157A (ko) | 2013-10-07 |
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