CN110744022A - Roll-belt type continuous casting device and casting process - Google Patents
Roll-belt type continuous casting device and casting process Download PDFInfo
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- CN110744022A CN110744022A CN201911191292.0A CN201911191292A CN110744022A CN 110744022 A CN110744022 A CN 110744022A CN 201911191292 A CN201911191292 A CN 201911191292A CN 110744022 A CN110744022 A CN 110744022A
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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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process
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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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
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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
- B22D11/14—Plants for continuous casting
- B22D11/143—Plants for continuous casting for horizontal casting
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Abstract
The invention discloses a roller-belt type continuous casting device and a casting process. The casting process comprises the following steps: firstly, the method comprises the following steps: the aluminum water enters the front box from the smelting furnace or the heat preservation furnace through the runner, the front box receives and collects the aluminum water flowing from the runner, a casting cavity is formed by the water-cooled upper roller, the water-cooled steel strip and the two side stop blocks, and the aluminum water is fed into the casting cavity through the casting nozzle; II, secondly: molten aluminum continuously enters a casting cavity, the upper surface of the molten aluminum is cooled by the upper roll surface, and the lower surface of the molten aluminum is cooled by a steel strip; thirdly, the method comprises the following steps: after the roller surface is discharged, the upper surface is cooled by an air cooling or cooling system, and the lower surface is continuously cooled by a steel strip; fourthly, the method comprises the following steps: when the cast slab leaves the steel strip, the cast slab is completely solidified, and after the cast slab leaves the steel strip, the cast slab runs to a rolling mill through a clamping roller to be rolled, and continuous casting and rolling are started. The device and the process can cast thicker plate blanks and improve the efficiency.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy casting, and particularly relates to a roller-belt type continuous casting device and a casting process.
Background
Continuous casting and rolling and continuous casting and rolling processes are short-flow manufacturing technologies and are highly regarded by the industry. The production of aluminum plates, aluminum foils, etc. by continuous casting and rolling and continuous casting and rolling processes is a relatively mature process. There are various processes for continuous casting and rolling, including a single roll method, a twin roll method, a wheel-belt method, a twin belt method, and the like. Of these, the single-roll method and the twin-roll method are mainly used for producing thin strips, while the wheel-strip method and the twin-strip method can produce thicker plates with a cast plate (slab) thickness of up to 50 mm.
The twin roll process is a cast rolling process. The gap between the two rolls forms a cavity, as shown in fig. 1, molten aluminum enters the cavity, and is cooled by the contact of the roll surface and the molten aluminum to solidify into a thin plate or a thin strip, and then the thin plate or the thin strip enters a rolling mill to be rolled into a strip. The contact time between the roll surface and molten aluminum is short, the cooling capacity of molten aluminum is limited, so the twin-roll method can only be used for casting thin plates, the thickness of the thin plates is generally not more than 10mm, the casting speed cannot be too fast, the production efficiency is not high, and the method can only be used for producing alloys with smaller solidification intervals, such as 1000 series, 3000 series and the like.
The double strip method is a cavity formed by an upper steel strip and a lower steel strip, as shown in fig. 2. The steel strip is cooled by forced cooling water all the time. The molten aluminum enters the cavity through the casting nozzle. The aluminum liquid is solidified into a casting plate (blank) under the forced cooling of the water-cooled steel belt. The steel strip is longer, and the cooling interval that forms is great, so the cooling capacity to the aluminium water is very big, can be used for producing thicker board, and thickness can reach 50mm, can produce wide panel moreover, and the width can reach 2 meters wide more. In addition, the larger cooling zone allows the strip to run at a faster rate, increasing the casting speed. The production efficiency of this process is very high. However, such equipment is very complex and expensive, which undoubtedly increases the production costs.
Therefore, the development of a casting process and equipment which are high in production efficiency, relatively simple and low in cost is of great significance.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a roller-belt type continuous casting device and a casting process, which can be used for producing wide thick plates, and have the advantages of high production efficiency, simple device and low cost. The technical scheme adopted by the invention is as follows:
a roll-belt type continuous casting device comprises a front box, a casting nozzle, an upper roll, a steel belt and two side stop blocks, wherein the upper roll, the steel belt and the two side stop blocks form a casting cavity, the front box is connected with the casting nozzle, and molten aluminum is fed into the casting cavity.
This casting device still includes tensioning roller, drive roller, backing roll, the steel band passes through the welding and forms the annular, supports and the tensioning by two tensioning rollers that are parallel to each other and drive roller, makes the steel band form a plane, the position height of tensioning roller is less than the drive roller, makes the plane that forms have 5 to 9 angle of inclination.
The driving roller is provided with a series of grooves along the roller diameter direction, a driving roller water spraying pipe is arranged in each groove, a nozzle faces to the axis connecting line position of the upper roller and the driving roller, and the water spraying direction is consistent with the moving direction of the steel belt. During casting production, water is continuously sprayed onto the steel strip to cool the steel strip and improve the cooling capacity of aluminum water. The number of the slots is enough to ensure that the steel strip is cooled evenly.
Be equipped with the backing roll in the middle of drive roller and the tensioning roller, the backing roll is parallel with the drive roller, the steel band is hugged closely to the backing roll upper surface, supports the steel band to rotate along with the steel band motion.
And a water spray nozzle is also arranged between the supporting rollers, so that water is continuously sprayed to the steel belt above the supporting rollers during casting production, the steel belt is cooled, and the cooling capacity of the cast plate blank is improved. The number of the water spray nozzles is enough to ensure that the steel strip is uniformly cooled.
The casting device also comprises a supporting base and a rack, wherein one side of the rack is fixed on the supporting base, and the other side of the rack is suspended, so that the steel belt is convenient to load and unload. The support roll is fixed on the frame, and the water jet is installed inside the frame. The tensioning roller bearing seat is arranged on the frame, and the tensioning oil cylinder arranged on the frame is used for tensioning the tensioning roller. The upper roller and the driving roller bearing seat are also arranged on the frame.
The upper roller is hollow, a water spray pipe is arranged in the upper roller, and a nozzle faces to the position where the molten aluminum is contacted with the upper roller; the upper roller is positioned above the driving roller and is parallel to the driving roller, the axis connecting line of the upper roller and the driving roller is vertical to the plane formed by the steel strip, and the distance between the upper roller and the steel strip needs to be consistent with the thickness of the cast slab.
The casting device further comprises a motor, a reduction gearbox and a transmission shaft, the upper roller and the driving roller are driven by the motor, the motor spindle is connected with the reduction gearbox, the reduction gearbox is connected with the transmission shaft, the transmission shaft is connected with the two rollers, the upper roller and the driving roller rotate in opposite directions under the driving of the motor, and the driving roller drives the steel belt to move from the higher end to the lower end.
The cooling system comprises an air cooling system or a shower cooling system or a water mist cooling system, and the air cooling system blows air to the cast plate blank cast through an air outlet; the shower cooling system is used for spraying rain to the cast plate blank cast through a shower nozzle; the water spray cooling system is used for spraying water spray to the cast slab cast through a spray nozzle, and the cooling system is arranged above the cast slab.
The stop blocks comprise flexible steel block chains consisting of steel blocks, the flexible steel block chains are arranged on two sides around the steel belt, the flexible steel block chains are driven to synchronously move when the steel belt moves, the thickness of the steel blocks of the flexible steel block chains is the same as that of a cast plate blank, and the upper roll surface, the steel belt surface and the side surfaces of the flexible steel block chains on the two sides completely form a casting cavity;
the other scheme of the stop block is that a steel ring is used, the inner diameter of the steel ring is the same as the diameter of the upper roller, the thickness of the steel ring is the same as the thickness of a plate blank to be cast, the steel ring is arranged on two sides of the upper roller, and the upper roller surface, the steel belt surface and the side surfaces of the steel rings on two sides completely form a casting cavity.
The casting process by adopting the roll-belt type continuous casting device comprises the following steps:
the method comprises the following steps: the aluminum water enters the front box from the smelting furnace or the heat preservation furnace through the runner, the front box receives and collects the aluminum water flowing from the runner, the water-cooled upper roller, the water-cooled steel strip and the two side stop blocks form a casting cavity, and the aluminum water is uniformly and continuously fed into the casting cavity through the casting nozzle.
Step two: molten aluminum continuously enters the casting cavity, the upper surface of the molten aluminum is cooled by the surface of the upper roller, and the lower surface of the molten aluminum is cooled by the steel strip.
Step three: after the roller surface is discharged, the upper surface is cooled by an air cooling or cooling system, and the lower surface is continuously cooled by a steel strip.
Step four: when the cast slab leaves the steel strip, the cast slab is completely solidified, and after the cast slab leaves the steel strip, the cast slab runs to a rolling mill through a clamping roller to be rolled, and continuous casting and rolling are started.
The casting device can realize high-speed casting for thin slab casting, and can be used for three casting conditions. Firstly, the method comprises the following steps: when the cast slab is rolled on the surface of the roller, only the surface of the cast slab is solidified, and the inside of the cast slab is not completely solidified. At the moment, the bottom surface of the cast slab is supported and cooled by the long steel strip and cannot collapse, on one hand, the upper surface of the cast slab is cooled by air, the lower surface of the cast slab is continuously cooled by the steel strip, and when the cast slab reaches the outlet of the steel strip, the cast slab can be completely solidified and can smoothly move to a downstream rolling mill for rolling. Secondly, the method comprises the following steps: if the casting speed is high, which causes the cast slab to leave the steel strip but not to be completely solidified, the cooling system can apply air cooling or water mist cooling or even direct water shower cooling to the cast slab, so as to accelerate the solidification. Thirdly, the method comprises the following steps: if the casting speed is further increased or the cast slab is further thickened, there is a possibility that the upper surface of the cast slab does not completely solidify when it comes out of the upper roll surface. At this time, since the bottom surface of the cast slab is supported and cooled by the long steel strip, and does not collapse, the solidified slab is positioned in front, and the stoppers are positioned on both sides, the molten aluminum which is not completely solidified does not flow freely, but keeps the shape. At this time, the air cooling can be firstly applied to the aluminum water which is not completely solidified on the upper roll surface through the air blowing port, so that the surface of the plate blank is rapidly solidified. Once the surface has solidified, the slab can be rapidly cooled using a method similar to semi-continuous direct chill casting, followed by direct water spray cooling through showers, and when it reaches the exit of the strip, it will solidify completely and can be moved smoothly to the downstream rolling mill for rolling.
The invention has the beneficial effects that: the invention provides a roller-belt type continuous casting device and a casting process, and the device has high efficiency and low cost and has the following advantages:
(1) compared with the double-roller casting method, the invention forms the casting cavity by the water-cooled upper roller, the water-cooled steel belt and the stop blocks at the two sides, and rapidly cools the plate blank by the cooling system.
(2) Compared with the casting process and equipment of the double-belt method, the casting equipment is simple and low in cost. The width, thickness and casting speed of the cast plate blank are equivalent to those of the casting process and equipment of the double-belt method, but the equipment is simplified greatly, the investment of infrastructure and equipment is low, the operation is simple, and the production cost is low.
Drawings
FIG. 1 is a schematic view of a twin roll casting process;
FIG. 2 is a schematic view of a twin-belt casting process;
FIG. 3 is a schematic view of an apparatus according to example 1 of the present invention;
FIG. 4 is a schematic cross-sectional view of an apparatus according to example 1 of the present invention;
FIG. 5 is a schematic illustration of solidification of a cast slab according to example 1 of the present invention;
FIG. 6 is a schematic view of an apparatus according to example 2 of the present invention;
FIG. 7 is a schematic cross-sectional view of an apparatus according to example 2 of the present invention;
FIG. 8 is a schematic illustration of solidification of a cast slab according to example 2 of the present invention;
FIG. 9 is a schematic cross-sectional view of an apparatus according to example 3 of the present invention;
fig. 10 is a schematic view of solidification of a cast slab according to example 3 of the present invention.
Description of the symbols: 1-front box; 2, upper rolling; 3-a steel ring; 4-a support base; 5, a transmission shaft; 6-reduction box; 7, a motor; 8, an air outlet; 9-spray or shower outlets; 10-a tension roll; 11-casting a slab; 12-a steel belt; 13-flexible steel block chain; 14-tensioning roll chock; 15-tensioning oil cylinder of tensioning roller; 16-a support roller; 17-a frame; 18-upper roll and drive roll chock; 19-water jet; 20-driving roller spray pipe; 21-a drive roller; 22-drive roller groove; 23-a casting nozzle; 24-casting rolls; 25-a solidification zone; 26-solidified thin strip; 27-aluminum water; 28-cooling water; 29-coagulated region.
Detailed Description
In order that the invention may be more clearly understood, the invention is described in further detail with reference to the accompanying drawings.
A roll-to-belt type continuous casting apparatus and a casting process provided according to an embodiment of the present invention will be described below with reference to fig. 1 to 10.
As shown in fig. 1 to 2, a twin roll casting process and a twin belt casting process are comparative examples.
As shown in fig. 3 to 10, a roll-belt type continuous casting apparatus includes a front box 1, a nozzle 23, an upper roll 2, a steel strip 12, and both side stoppers, the upper roll 2 and the steel strip 12 and both side stoppers forming a casting cavity, the front box 1 being connected to the nozzle 23 to feed molten aluminum into the casting cavity.
The casting apparatus further comprises a tension roll 10, a driving roll 21, and a support roll 16, wherein the steel strip 12 is formed into a ring shape by welding, supported and tensioned by the two tension rolls 10 and the driving roll 21 which are parallel to each other, so that the steel strip 12 forms a plane, the tension rolls 10 are positioned lower than the driving roll 21, and the formed plane has an inclination angle of 5 ° to 9 °.
The driving roller 21 is provided with a series of grooves 22 along the roller diameter direction, a driving roller water spraying pipe 20 is arranged in each groove, a nozzle faces to the axis connecting line position of the upper roller 2 and the driving roller 21, the water spraying direction is consistent with the steel strip moving direction, when casting production is carried out, water is continuously sprayed on the steel strip 12, the steel strip 12 is cooled, the cooling capacity of aluminum water is improved, the number of the grooves is enough, and the steel strip 12 is uniformly cooled.
A supporting roller 16 is arranged between the driving roller 21 and the tensioning roller 10, the supporting roller 16 is parallel to the driving roller 21, the upper surface of the supporting roller 16 is tightly attached to the steel belt 12, supports the steel belt 12 and rotates along with the movement of the steel belt 12;
and water spray nozzles 19 are also arranged between the supporting rollers 16, water is continuously sprayed to the steel strip 12 on the supporting rollers to cool the steel strip 12 and improve the cooling capacity of the cast plate blank during casting production, and the quantity of the water spray nozzles 19 is enough to ensure that the steel strip 12 is uniformly cooled.
The casting device also comprises a supporting base 4 and a frame 17, wherein one side of the frame 17 is fixed on the supporting base 4, and the other side is suspended, so that the steel belt 12 can be conveniently loaded and unloaded; the support roller 16 is fixed on the frame 17, and the water jet 19 is arranged inside the frame;
the tension roll chocks 14 are mounted on a frame 17, and the tension roll 10 is tensioned by a tension cylinder 15 mounted on the frame 17, and the upper roll and the drive roll chocks 18 are also mounted on the frame.
The upper roller 2 is hollow, a water spraying pipe (not shown) is arranged in the upper roller, and a nozzle is opposite to the position where the molten aluminum is contacted with the upper roller; the upper roller 2 is positioned above and parallel to the driving roller 21, the axial center connecting line of the upper roller 2 and the driving roller 21 is vertical to the plane formed by the steel strip 12, and the distance between the upper roller 2 and the steel strip 12 is required to be consistent with the thickness of the cast slab 11.
The casting device further comprises a motor 7, a reduction gearbox 6 and a transmission shaft 5, the upper roller 2 and the driving roller 21 are driven by the motor 7, a main shaft of the motor 7 is connected with the reduction gearbox 6, the reduction gearbox 6 is connected with the transmission shaft 5, the transmission shaft 5 is connected with the two rollers, the upper roller 2 and the driving roller 20 rotate in opposite directions under the driving of the motor 7, and the driving roller 21 drives the steel belt 12 to move from one higher end to one lower end.
The cooling system comprises an air cooling system or a shower system or a water mist cooling system, and the air cooling system blows air to the cast slab 11 through the air outlet 8; the shower system is used for spraying rain to the cast plate blank 11 through a shower nozzle 9; the water mist cooling system sprays water mist to the cast slab 11 through the spray nozzle 9, and the cooling system is installed above the cast slab 11.
The stop block comprises a flexible steel block chain 13 or a steel ring 3 consisting of steel blocks, the flexible steel block chain 13 is placed on two sides around a steel belt 12, the flexible steel block chain 13 is driven to synchronously move when the steel belt 12 moves, the thickness of the steel block of the flexible steel block chain 13 is the same as that of a cast slab 11, and an upper rolling surface, the steel belt surface and the side surfaces of the flexible steel block chains on the two sides completely form a casting cavity;
the inner diameter of the steel ring 3 is the same as the diameter of the upper roller 2, the thickness of the steel ring 3 is the same as the thickness of the slab 11 to be cast, the steel ring 3 is arranged on two sides of the upper roller 2, and the upper roller surface, the steel strip surface and the side surfaces of the steel rings on two sides completely form a casting cavity.
A process for casting by using a roll-belt type continuous casting apparatus, comprising the steps of:
the method comprises the following steps: the aluminum water enters the front box 1 from the smelting furnace or the heat preservation furnace through the runner, the front box 1 receives and collects the aluminum water flowing from the runner, a casting cavity is formed by the water-cooled upper roller 2, the water-cooled steel strip 12 and the stop blocks at two sides, and the aluminum water is uniformly and continuously fed into the casting cavity through the casting nozzle 23;
step two: molten aluminum continuously enters a casting cavity, the upper surface of the molten aluminum is cooled by the roller surface of the upper roller 2, and the lower surface of the molten aluminum is cooled by the steel strip 12;
step three: after the roller surface is discharged, the upper surface is cooled by an air cooling or cooling system, and the lower surface is continuously cooled by a steel strip 12;
step four: the cast slab 11 is completely solidified when leaving the steel strip 12, and after leaving the steel strip 12, it is run to a rolling mill through pinch rolls (not shown) to be rolled, and continuous casting and rolling are started.
As shown in fig. 3 to 5, embodiment 1: a high-efficiency low-cost roll-belt type continuous casting process and a device are used for casting 3003 alloy cast-rolled coils with the thickness of 10mm at a high speed, and the casting speed is 4.5 m/min. The casting device comprises a front box 1, a casting nozzle 23, an upper roller 2, a driving roller 21, a tensioning roller 10, a supporting roller 16, a water spray nozzle 19, a steel belt 12, a steel ring 3 with two side stoppers arranged on the upper roller 2 and an air cooling system. The molten aluminum enters the front box 1 from the smelting furnace (or the holding furnace) through the runner. The front box 1 receives and collects the molten aluminum from the runner, and the molten aluminum is uniformly and continuously fed into the casting cavity through the casting nozzle 23. Molten aluminum enters the cavity, the upper surface of the molten aluminum is cooled by the surface of the upper roller 2, and the lower surface of the molten aluminum is cooled by the steel strip 12. At the time of the upper roll surface, only the surface layer of the upper and lower surfaces of the cast slab 11 is solidified, and the middle portion is not solidified, as shown in fig. 5. The lower surface is continuously cooled by the steel strip 12, air cooling is applied to the upper surface through the air outlet 8 for cooling in order to accelerate solidification of the upper surface, when the cast slab 11 leaves the steel strip 12, the cast slab 11 is completely solidified, and the cast slab runs to the clamping rollers and runs to the rolling mill through the clamping rollers for rolling, so that the continuous casting and rolling process is formed. In this case, although the thickness of the cast slab 11 is only 10mm, as in the twin roll process, the casting speed is twice as fast as that of the twin roll process, and thus the productivity is greatly improved.
As shown in fig. 6 to 8, embodiment 2: a6061 alloy plate blank with the thickness of 19mm is cast at high speed at the casting speed of 4.5m/min by using a high-efficiency low-cost roller-belt type continuous casting process and device. The casting device comprises a front box 1, a casting nozzle 23, an upper roller 2, a driving roller 21, a tensioning roller 10, a supporting roller 16, a water spray nozzle 19, a steel belt 12, a flexible steel block chain 13 with two side stop blocks composed of steel blocks and a cooling system. The molten aluminum enters the front box 1 from the smelting furnace (or the holding furnace) through the runner. The front box 1 receives and collects the molten aluminum from the runner, and the molten aluminum is uniformly and continuously fed into the casting cavity through the casting nozzle 23. Molten aluminum enters the cavity, the upper surface of the molten aluminum is cooled by the surface of the upper roller 2, and the lower surface of the molten aluminum is cooled by the steel strip 12. When the cast slab 11 exits the roll surface of the upper roll 2, only a thin surface layer is solidified on the upper and lower surfaces, and the middle part is not solidified, as shown in fig. 8. The lower surface is continuously cooled by the steel belt 12, and in order to accelerate the solidification of the upper surface, air cooling is applied through the air outlet 8 for cooling, and then water mist cooling is applied through the mist spray outlet 9 for cooling. When the cast slab 11 leaves the steel strip 12, the cast slab 11 is completely solidified, runs to the clamping rolls, runs to the rolling mill through the clamping rolls, and is rolled, so that the continuous casting and rolling process is formed. In this example, the thickness of the cast slab 11 is 19mm, the casting speed is 4.5m/min, and in the prior art, only the twin-belt continuous casting process is possible. The process and the device of the invention can reach the process level of the double-belt method, but the equipment is greatly simplified, and the production cost is obviously reduced.
As shown in fig. 9 to 10, embodiment 3: a3003 alloy plate blank with the thickness of 32mm is cast at high speed by a high-efficiency low-cost roll-belt type continuous casting process and a device, and the casting speed is 4.5 m/min. The casting device comprises a front box 1, a casting nozzle 23, an upper roller 2, a driving roller 21, a tensioning roller 10, a supporting roller 16, a water spray nozzle 19, a steel belt 12, a flexible steel block chain 13 with two side stoppers composed of steel blocks and a cooling system. The molten aluminum enters the front box 1 from the smelting furnace (or the holding furnace) through the runner, the front box 1 receives and collects the molten aluminum flowing from the runner, and the molten aluminum is uniformly and continuously fed into the casting cavity through the casting nozzle 23. Molten aluminum enters the cavity, the upper surface of the molten aluminum is cooled by the surface of the upper roller 2, and the lower surface of the molten aluminum is cooled by the steel strip 12. The upper surface of the cast slab 11 is not yet completely solidified at the time of the surface of the upper roll 2, and a schematic view is shown in fig. 10. The lower surface continues to be cooled by the steel strip 12; in order to accelerate the solidification of the upper surface, air cooling is applied through the air outlet 8 for cooling, and once the surface has solidified, rain cooling is performed by spraying water through the shower outlet 9. When the cast slab 11 leaves the steel strip 12, the cast slab 11 is completely solidified, runs to the clamping rolls, runs to the rolling mill through the clamping rolls, and is rolled, so that the continuous casting and rolling process is formed. In this example, the thickness of the cast slab 11 is up to 32mm, the casting speed is 4.5m/min, and in the prior art, only the twin-belt continuous casting process is possible. The process and the device of the invention can reach the process level of the double-belt method, but the equipment is greatly simplified, and the production cost is obviously reduced.
Claims (10)
1. The roll-belt type continuous casting device is characterized by comprising a front box (1), a casting nozzle (23), an upper roll (2), a steel strip (12) and two side stop blocks, wherein the upper roll (2), the steel strip (12) and the two side stop blocks form a casting cavity, and the front box (1) is connected with the casting nozzle (23).
2. The roll-belt type continuous casting apparatus according to claim 1, further comprising tension rolls (10), a driving roll (21), and a support roll (16), wherein the steel strip (12) is formed into a ring shape by welding, supported and tensioned by two parallel tension rolls (10) and the driving roll (21) so that the steel strip (12) forms a plane, the tension rolls (10) are positioned lower than the driving roll (21) so that the formed plane has an inclination angle of 5 ° to 9 °.
3. A roll-belt type continuous casting apparatus according to claim 2, wherein said drive roll (21) is provided with a series of grooves (22) along the radial direction of the roll, and a drive roll water spray pipe (20) is provided in each groove, and the spray direction is aligned with the moving direction of the steel strip at the position of the axis connecting the upper roll (2) and the drive roll (21).
4. The roll-belt type continuous casting apparatus according to claim 2, wherein a support roll (16) is provided between the drive roll (21) and the tension roll (10), the support roll (16) is parallel to the drive roll (21), an upper surface of the support roll (16) abuts against the steel strip (12), supports the steel strip (12), and rotates with the movement of the steel strip (12);
and water spray nozzles (19) are also arranged between the supporting rollers (16).
5. A roll-belt type continuous casting apparatus according to claim 1, further comprising a support base (4) and a frame (17), wherein the frame (17) is fixed to the support base (4) and suspended to facilitate loading and unloading of the steel strip (12); the supporting roller (16) is fixed on the rack (17), and the water spraying pipe (19) is arranged inside the rack;
the tensioning roller bearing blocks (14) are installed on the rack (17), the tensioning roller (10) is tensioned by the tensioning oil cylinder (15) installed on the rack (17), and the upper rolling roller and the driving roller bearing blocks (18) are also installed on the rack.
6. The roll-belt type continuous casting apparatus according to claim 1, wherein the upper roll (2) is hollow and has a water spray pipe inside, and the nozzle is directed to a position where the molten aluminum contacts the upper roll; the upper roller (2) is positioned above the driving roller (21) and is parallel to the driving roller, the axis connecting line of the upper roller (2) and the driving roller (21) is vertical to the plane formed by the steel strip (12), and the distance between the upper roller (2) and the steel strip (12) needs to be consistent with the thickness of the cast slab (11).
7. The roll-belt type continuous casting device according to claim 1, further comprising a motor (7), a reduction gearbox (6) and a transmission shaft (5), wherein the upper roll (2) and the driving roll (21) are driven by the motor (7), a main shaft of the motor (7) is connected with the reduction gearbox (6), the reduction gearbox (6) is connected with the transmission shaft (5), the transmission shaft (5) is connected with the two rolls, the upper roll (2) and the driving roll (20) rotate in opposite directions under the driving of the motor (7), and the driving roll (21) drives the steel belt (12) to move from a higher end to a lower end.
8. The roll-belt type continuous casting apparatus according to claim 1, wherein the cooling system comprises an air cooling system or a shower cooling system or a mist cooling system, and the air cooling system blows air to the cast slab (11) cast out through the air outlet (8); the shower cooling system is used for spraying rain to the cast plate blank (11) through a shower nozzle (9); the water spray cooling system is used for spraying water spray to the cast slab (11) cast through a spray opening (9), and the cooling system is arranged above the cast slab (11).
9. The roll-belt type continuous casting device according to claim 1, wherein the stopper comprises a flexible steel block chain (13) or a steel ring (3) consisting of steel blocks, the flexible steel block chain (13) is placed at two sides around the steel belt (12), the flexible steel block chain (13) is driven to move synchronously when the steel belt (12) moves, the thickness of the steel blocks of the flexible steel block chain (13) is the same as that of the cast slab (11), and the upper rolling surface, the steel belt surface and the side surfaces of the flexible steel block chain at two sides completely form a casting cavity;
the inner diameter of the steel ring (3) is the same as the diameter of the upper roller (2), the thickness of the steel ring (3) is the same as the thickness of a slab (11) to be cast, the steel ring (3) is arranged on two sides of the upper roller (2), and a casting cavity is completely formed by the upper roller surface, the steel strip surface and the side surfaces of the steel ring on two sides.
10. A casting process using the roll-belt type continuous casting apparatus according to claim 1, comprising the steps of:
the method comprises the following steps: the aluminum water enters the front box (1) from the smelting furnace or the heat preservation furnace through the runner, the front box (1) receives and collects the aluminum water flowing from the runner, a casting cavity is formed by the water-cooled upper roller (2), the water-cooled steel strip (12) and the stop blocks at the two sides, and the aluminum water is uniformly and continuously fed into the casting cavity through the casting nozzle (23);
step two: molten aluminum continuously enters a casting cavity, the upper surface of the molten aluminum is cooled by the surface of an upper roller (2), and the lower surface of the molten aluminum is cooled by a steel strip (12);
step three: after the roller surface is discharged, the upper surface is cooled by an air cooling or cooling system, and the lower surface is continuously cooled by a steel strip (12);
step four: the cast slab (11) is completely solidified when leaving the steel strip (12), and after leaving the steel strip (12), the cast slab is run to a rolling mill through a clamping roller to be rolled, and continuous casting and rolling are started.
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| CN201911191292.0A CN110744022A (en) | 2019-11-28 | 2019-11-28 | Roll-belt type continuous casting device and casting process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139465A (en) * | 2020-09-04 | 2020-12-29 | 东北大学 | Continuous casting device and working method for aluminum alloy and composite plate strip blank thereof |
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