CN211331235U

CN211331235U - Roller-belt type aluminum ingot continuous casting device

Info

Publication number: CN211331235U
Application number: CN201922089851.9U
Authority: CN
Inventors: 刘玉林; 毕常兰
Original assignee: Shenyang Aerospace University
Current assignee: Shenyang Aerospace University
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-08-25
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses a roller-belt type aluminum ingot continuous casting device. The casting device comprises a front box, a casting nozzle, an upper roller, a steel belt and two side stop blocks, wherein the upper roller, 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 sent 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 annularity, supports and the tensioning by parallel tensioning roller and drive roller, makes the steel band form a plane, the position height of tensioning roller is less than the drive roller, because the casting slab is thick, in order to prevent that the aluminium water from flowing too fast, plane inclination is difficult too big, makes the plane of formation have 0 to 5 angle of inclination. The utility model discloses compare with current ingot mould casting process, become semicontinuous casting and be continuous casting, production efficiency very improves, and the ingot casting quality very improves, and the surface is bright, and oxidation phenomenon very alleviates.

Description

Roller-belt type aluminum ingot continuous casting device

Technical Field

The utility model belongs to the technical field of the aluminum alloy casting, concretely relates to roller-belt aluminium ingot continuous casting device.

Background

The electrolytic aluminum ingot for remelting is a raw material for producing aluminum alloy. The production process is generally to collect the aluminum water from the electrolytic bath into a treatment furnace. After being refined and the like in the furnace, the molten aluminum is sent to the water separator through the launder. Pouring molten aluminum into the ingot mold through the water distributor, solidifying the molten aluminum in the ingot mold to form an aluminum ingot, wherein one aluminum ingot is about 15-20 kilograms in weight, and the process is semi-continuous, and a plurality of ingot molds are arranged on the conveying chain side by side and are driven by the conveying chain to move continuously. When one ingot mould is full, leaving the pouring position, the next ingot mould enters the pouring position to be poured, and the ingot mould which is full is solidified in motion and moves to the demoulding position to be demoulded. And moving the empty mold to a pouring position for pouring to form a semi-continuous pouring process. The casting process of pre-alloyed aluminum ingot or cast aluminum ingot after scrap remelting is basically the same, the melting of the aluminum ingot is firstly carried out in a melting furnace, then required alloy elements are added according to the grade of the alloy to be produced, and melt processing is carried out, the solidification speed of the aluminum ingot produced by the process is low, the surface oxidation is serious, and the production efficiency is low.

Therefore, the research and development of the aluminum ingot casting equipment which is high in production efficiency, relatively simple and low in cost is of great significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a roller-belt aluminium ingot continuous casting device is provided, can be used for casting aluminium ingot, aluminium ingot surface oxidation is few production efficiency height, and the device is simple. The utility model discloses the technical scheme who adopts as follows:

a roller-belt type ingot casting continuous casting device comprises a front box, a casting nozzle, an upper roller, a steel belt and two side stop blocks; the upper roller, the steel belt and the stop blocks on the two sides form a casting cavity, and the front box is connected with the casting nozzle and used for feeding molten aluminum 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 annularity, supports and the tensioning by parallel tensioning roller and drive roller, makes the steel band form a plane, the position height of tensioning roller is less than the drive roller, because the casting slab is thick, in order to prevent that the aluminium water from flowing too fast, plane inclination is difficult too big, makes the plane of formation have 0 to 5 angle of inclination.

A series of grooves are formed in the driving roller along the roller passing direction, a driving roller water spraying pipe is placed in each groove, the 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, the cooling capacity of aluminum water is improved, the number of the grooves is enough, and the uniform cooling of the steel strip is guaranteed.

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. In the casting production, water is continuously sprayed to the steel strip on the upper surface to cool the steel strip and improve the cooling capacity of the cast slab. 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 frame; 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 assemble and disassemble. The support roll is fixed on the frame, and the water jet is installed inside the frame.

The tensioning roller bearing blocks are installed on the rack, the tensioning oil cylinder is installed on the rack, the tensioning roller is tensioned through the tensioning oil cylinder, and the upper roller and the driving roller bearing blocks are also installed on the rack.

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, a motor, a reduction gearbox base and a transmission shaft, wherein the upper roller and the driving roller are driven by the motor, the motor main shaft 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 sprays water spray to the cast slab cast through the spray nozzle, and the cooling system is arranged above the cast slab.

The dog includes the flexible steel billet chain of constituteing by the steel billet, flexible steel billet chain places on both sides around the steel band, drive flexible steel billet chain synchronous motion when the steel band moves, the steel billet thickness of flexible steel billet chain is the same with the thickness of casting slab, goes up the side of roll surface and steel band face and both sides flexible steel billet chain, complete formation a casting die cavity.

Due to the requirement of the aluminum ingot casting process, the size of the cast slab is thicker, and the casting cavity is not suitable to be too wide, wherein the width of the casting cavity is 200-500mm, preferably 250-350mm, and the thickness of the casting cavity is 30-60mm, preferably 40-50 mm.

The cast slab is thick and the casting speed is high, and the cast slab may not be completely solidified on the upper surface when coming 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 downstream smoothly for slitting.

The utility model has the advantages that: through the utility model provides a roller-belt aluminium ingot continuous casting device, the device high efficiency low cost has following advantage:

the utility model relates to a roller-belt aluminium ingot continuous casting device compares with current ingot mould casting process, becomes semicontinuous casting for continuous casting, and production efficiency very improves, and in addition, the ingot casting quality very improves, and the surface is bright, and oxidation phenomenon very alleviates.

Drawings

FIG. 1 is a schematic view of a casting machine apparatus according to the present invention;

FIG. 2 is a schematic cross-sectional view of the casting machine apparatus of the present invention;

fig. 3 is a schematic diagram of solidification of a cast slab according to example 1 of the present invention;

FIG. 4 is a schematic view of the production line of the aluminum ingot continuous casting process of the present invention.

Description of the symbols: 1-front box; 2, upper rolling; 3-a support base; 4, a transmission shaft; 5, a reduction gearbox; 6, a motor; 7-motor and reduction box base; 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-a casting machine; 25-a nip roll; 26-pass roller; 27-leveling rolls; 28-a shear roller; 29-a cooling chamber; and 30, stacking and packing.

Detailed Description

In order to understand the present invention more clearly, the present invention will be described in further detail with reference to the accompanying drawings.

A roll-to-belt type aluminum ingot continuous casting apparatus provided according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1 to 4, a roll-belt type ingot continuous casting apparatus includes a front box 1, a nozzle 23, an upper roll 2, a steel strip 12, both side stoppers; the upper roller 2, the steel strip 12 and the stop blocks at two sides form a casting cavity, the front box 1 is connected with a casting nozzle 23, and molten aluminum is fed 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 loop shape by welding, supported and tensioned by the tension roll 10 and the driving roll 21 in parallel so that the steel strip 12 forms a plane, the tension roll 10 is positioned lower than the driving roll 21 so that the formed plane has an inclination angle of 0 to 5 °.

The width of the casting cavity is 200-500mm, preferably 250-350mm, and the thickness is 30-60mm, preferably 40-50 mm.

A series of grooves 22 are formed in the drive roller 21 in the roller passing direction. A driving roller water spraying pipe 20 is arranged in each groove, the spraying hole faces to the axis connecting line position of the upper roller 2 and the driving roller 21, and the water spraying direction is consistent with the moving direction of the steel belt 12. During casting production, water is continuously sprayed onto the steel strip 12 to cool the steel strip 12 and improve the cooling capacity of molten aluminum, and the number of the grooves is enough to ensure uniform cooling of the steel strip 12.

And 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, and 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. Water jets 19 are also provided between the support rollers 16. In the casting production, water is continuously sprayed to the steel strip 12 on the upper surface to cool the steel strip 12 and improve the cooling capacity of the cast slab. The number of jets is sufficient to ensure even cooling of the strip 12.

The casting device further comprises a support base 3 and a frame 17. The frame 17 is fixed on the support base 3 and suspended at the same time, so that the steel belt 12 can be conveniently assembled and disassembled. The support roller 16 is fixed on the frame, and the water jet 19 is installed inside the frame 17.

The tension roller bearing seat 14 is installed on a frame 17, the tension oil cylinder 15 is installed on the frame 17, and the tension roller 10 is tensioned through the tension oil cylinder 15. The upper roll and drive roll chock 18 are also mounted on the frame 17.

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 6, a reduction gearbox 5, a motor, a reduction gearbox base 7 and a transmission shaft 4, the upper roller 2 and the driving roller 21 are driven by the motor 6, the main shaft of the motor 6 is connected with the reduction gearbox 5, the reduction gearbox 5 is connected with the transmission shaft 4, the transmission shaft 4 is connected with the two rollers, under the driving of the motor 6, the upper roller 2 and the driving roller 21 rotate towards opposite directions, and the driving roller 21 drives the steel belt 12 to move from a higher end to a 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 slab 11 through an air outlet 8; the water shower cooling is that the cast slab 11 is showered by a shower nozzle; the water mist cooling is to spray water mist to the cast slab 11 which is cast out through a spray opening, and a cooling system is installed above the cast slab 11.

The stop block comprises a flexible steel block chain 13 consisting of steel blocks, the flexible steel block chain 13 is placed on two sides around a steel belt 12, the steel belt 12 drives the flexible steel block chain 13 to move synchronously, 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 casting process principle of the utility model is as follows: the method comprises the following steps:

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 a cooling system, and the lower surface is continuously cooled by a steel strip 12;

step four: and when the cast slab 11 leaves the steel belt 12, the cast slab is completely solidified, after leaving the steel belt 12, the cast slab is moved to a slitting roller through a clamping roller to be slit, and the cast slab which is slit into sections is stacked and packaged after being further cooled to form the ingot casting continuous casting process.

As shown in fig. 1 to 4, embodiment 1: a high-efficiency low-cost roll-belt type continuous casting process and a high-speed casting device are used for casting an electrolytic remelting aluminum ingot, wherein the casting speed is 4.0 m/min. The casting device consists of 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, two side stoppers and an air cooling system; as described in fig. 1 and 3. Collecting the aluminum water from the electrolytic bath into a treatment furnace. After refining or the like in the furnace, the molten steel is introduced into the front box 1 through a launder. 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 upper roller 2, and the lower surface of the molten aluminum is cooled by the steel strip 12. When the cast slab emerges from the upper roll surface, the upper surface has not yet solidified completely, as shown in fig. 3. The lower surface is continuously cooled by the steel belt; 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, cooling is performed by spraying water or water mist through the spray or shower nozzles 9, selected according to the actual conditions, to ensure that the cast slab has completely solidified when it leaves the strip. When the cast slab leaves the steel strip, the cast slab is completely solidified, runs to the clamping rolls, continues to run forwards on the roller table through the clamping rolls, is leveled by the leveling rolls, runs to the slitting rolls and is divided into sections, and then is further cooled, stacked and packed as shown in fig. 4.

Example 2: the difference from example 1 is that an alloy aluminum ingot was cast. Such as pre-alloyed ingots for the casting industry or ingots cast after scrap remelting. The smelting of the aluminum ingot is to smelt in a smelting furnace, add required alloy elements according to the grade of the alloy to be produced and perform melt processing. The aluminum ingot smelting process is different, but the casting process is the same.

Claims

1. A roller-belt type aluminum ingot continuous casting device is characterized by comprising a front box (1), a casting nozzle (23), an upper roller (2), a steel belt (12) and two side stop blocks; the upper roller (2), the steel strip (12) and the stop blocks on the two sides form a casting cavity, and the front box (1) is connected with a casting nozzle (23).

2. The continuous casting apparatus of a roll-strip aluminum ingot according to claim 1, further comprising tension rolls (10), a driving roll (21), and a supporting roll (16), wherein the steel strip (12) is formed into a ring shape by welding, supported and tensioned by the tension rolls (10) and the driving roll (21) in parallel, so that the steel strip (12) forms a plane, and the tension rolls (10) are positioned lower than the driving roll (21) so that the formed plane has an inclination angle of 0 ° to 5 °.

3. A roll-strip aluminum ingot continuous casting apparatus as claimed in claim 2, wherein the driving roll (21) is provided with a series of grooves (22) along the roll passing direction, and a driving roll water spray pipe (20) is disposed in each groove, facing the axis connecting the upper roll (2) and the driving roll (21), in the same direction as the moving direction of the steel strip (12).

4. The continuous casting apparatus of a roll-strip aluminum ingot 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), and 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-to-belt aluminum ingot continuous casting apparatus as claimed in claim 2, characterized in that the casting apparatus further comprises a support base (3) and a frame (17); the rack (17) is fixed on the support base (3) at one side and suspended at the other side, so that the steel belt (12) is convenient to assemble and disassemble; the supporting roller (16) is fixed on the frame, and the water spray nozzle (19) is arranged in the frame (17);

the tensioning roller bearing seat (14) is installed on the frame (17), the tensioning oil cylinder (15) is installed on the frame (17), the tensioning roller (10) is tensioned through the tensioning oil cylinder (15), and the upper roller (2) and the driving roller bearing seat (18) are also installed on the frame (17).

6. The continuous casting apparatus of a roll-strip aluminum ingot 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 aluminum ingot continuous casting device according to claim 2, characterized in that the casting device further comprises a motor (6), a reduction gearbox (5), a motor and reduction gearbox base (7) and a transmission shaft (4), wherein the upper roll (2) and the drive roll (21) are driven by the motor (6), the main shaft of the motor (6) is connected with the reduction gearbox (5), the reduction gearbox (5) is connected with the transmission shaft (4), the transmission shaft (4) is connected with the two rolls, the upper roll (2) and the drive roll (21) rotate in opposite directions under the drive of the motor (6), and the drive roll (21) drives the steel belt (12) to move from the higher end to the lower end.

8. A roll-to-belt aluminum ingot continuous casting apparatus as claimed in claim 1, wherein the cooling system comprises an air cooling system or a shower cooling system or a water mist cooling system, and the cooling system is installed above the cast slab (11).

9. The roll-strip aluminum ingot continuous casting apparatus as claimed in claim 1, wherein the stopper comprises a flexible steel block chain (13) consisting of steel blocks, the flexible steel block chain (13) is placed around the steel strip (12) at both sides, the steel strip (12) moves to drive the flexible steel block chain (13) to move synchronously, the thickness of the steel blocks of the flexible steel block chain (13) is the same as that of the casting slab (11), and the upper rolling surface, the steel strip surface and the side surfaces of the flexible steel block chain at both sides completely form a casting cavity;

the width of the casting cavity is 200-500mm, and the thickness of the casting cavity is 30-60 mm.