JP7261283B1 - Slag removal equipment and plating equipment - Google Patents

Abstract

A slag removing device and plating equipment capable of efficiently discharging slag in a snout with a simple configuration are provided. A slag removing device for removing slag in a snout having a lower end that is immersed in a molten metal plating bath is provided around the circumference so as to face the inner wall surface of the snout at the lower end of the snout. an inner wall, and an outer wall provided around the circumference facing the outer wall surface of the snout at the lower end of the snout and having an upper end positioned higher than the upper end of the inner wall, and a receiving plate that can receive the lower end of the snout, and a receiving plate that extends upward from the bottom surface of the receiving plate between the inner wall and the outer wall and is positioned lower than the upper end of the inner wall. an intermediate wall having an upper end, wherein at least a portion of the inner wall, the intermediate wall and the bottom surface define a reservoir for storing molten metal; A discharge port is provided for discharging the molten metal overflowing from the bottom face downward. [Selection drawing] Fig. 2B

Description

The present disclosure relates to slag removal equipment and plating equipment.

In a plating facility for plating a metal strip (steel strip, etc.) with a molten metal, the strip is placed between the outlet of the heat treatment furnace for heat-treating the strip and the plating tank in which the molten metal is stored. An enclosing tubular snout is provided. The snout is provided so that its tip (lower end) is immersed in the molten metal in the plating bath, thereby suppressing the intrusion of air into the snout and the leakage of atmospheric gas inside the snout to the outside. be.

The inside of the snout is usually filled with an atmospheric gas such as a reducing gas or a non-oxidizing gas, which suppresses oxidation of the strip passing through the snout and the molten metal in the plating bath. , traces of oxygen may be present. Therefore, in the snout, the molten metal in the plating bath reacts with oxygen to form metal oxide slag on the surface of the plating bath. If the slag floating in the plating bath adheres to the strip, it can cause plating defects and compromise the quality of the strip. Therefore, it is necessary to discharge the slag generated inside the snout to the outside of the snout.

Patent Literature 1 discloses a plating apparatus in which a mechanism for discharging slag inside the snout to the outside of the snout is provided at the lower end of the snout. In this device, an outflow chamber is formed by a snout wall at the lower end of the snout, a floor connected to the snout wall, and an overflow wall, and slag and molten metal introduced into the outflow chamber are sucked by a suction pump. to discharge out of the snout and outflow chamber.

Japanese Patent No. 6329621

The device of Patent Document 1 has a complicated structure because a slag discharge mechanism for discharging slag inside the snout is provided integrally with the snout. In addition, since the slag discharge mechanism is provided integrally with the snout, it is difficult to check the slag discharge state, or it is difficult to inspect and clean the system, making it difficult to efficiently discharge the slag.

In view of the above circumstances, it is an object of at least one embodiment of the present invention to provide a slag removing apparatus and plating equipment capable of efficiently discharging slag in a snout with a simple configuration.

A slag removing device according to at least one embodiment of the present invention comprises:
A slag removal apparatus for removing slag in a snout having a lower end immersed in a molten metal plating bath, comprising:
an inner wall provided around the circumference so as to face the inner wall surface of the snout at the lower end of the snout;
an outer wall provided over a circumference so as to face the outer wall surface of the snout at the lower end portion of the snout and having an upper end positioned higher than the upper end of the inner wall;
a receptacle capable of receiving the lower end of the snout;
an intermediate wall extending upward from the bottom surface of the saucer portion between the inner wall and the outer wall and having an upper end positioned lower than the upper end of the inner wall;
with
at least a portion of the inner wall, the intermediate wall, and the bottom surface define a reservoir for storing molten metal;
a discharge port for discharging the molten metal overflowing from the reservoir through the upper end of the intermediate wall downward from the bottom surface;
Prepare.

In addition, the plating equipment according to at least one embodiment of the present invention,
a plating tank for storing molten metal;
a snout having a lower end that is immersed in the molten metal in the plating bath;
a slag removal device as described above configured to remove slag in the snout;
Prepare.

According to at least one embodiment of the present invention, there is provided a slag removing apparatus and a plating facility capable of efficiently discharging slag in a snout with a simple configuration.

1 is a schematic configuration diagram of a plating facility according to one embodiment; FIG. 1 is a cross-sectional view along a horizontal plane of a slag remover according to one embodiment; FIG. FIG. 2B is a view showing a BB cross section of the slag removing device shown in FIG. 2A; FIG. 2B is a view showing a CC cross section of the slag removing device shown in FIG. 2A; 1 is a cross-sectional view along a horizontal plane of a slag remover according to one embodiment; FIG. FIG. 3B is a view showing a BB cross section of the slag removing device shown in FIG. 3A; FIG. 3B is a view showing a CC cross section of the slag removing device shown in FIG. 3A; 1 is a cross-sectional view along a horizontal plane of a slag remover according to one embodiment; FIG. 4B is a view showing a BB cross section of the slag removing device shown in FIG. 4A; FIG. 1 is a cross-sectional view along a horizontal plane of a slag remover according to one embodiment; FIG. FIG. 5B is a view showing a BB cross section of the slag removing device shown in FIG. 5A; 1 is a cross-sectional view along a horizontal plane of a slag remover according to one embodiment; FIG. 6B is a view showing a BB cross section of the slag removing device shown in FIG. 6A; FIG. 1 is a schematic diagram of a slag removal apparatus according to one embodiment; FIG. 1 is a schematic diagram of a slag removal apparatus according to one embodiment; FIG. 1 is a schematic diagram of a slag removal apparatus according to one embodiment; FIG. 1 is a schematic diagram of a slag removal apparatus according to one embodiment; FIG. 1 is a schematic diagram of a plating facility according to one embodiment; FIG. 1 is a schematic diagram of a plating facility according to one embodiment; FIG. 1 is a schematic block diagram of a plating facility according to one embodiment; FIG.

Several embodiments of the present invention will now be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, and are merely illustrative examples. do not have.

(Configuration of plating equipment)
FIG. 1 is a schematic configuration diagram of a plating facility to which a slag removing device according to one embodiment is applied. As shown in FIG. 1, a plating facility 100 is a facility for continuously plating a metal strip S (for example, a steel strip), and includes a heat treatment furnace 2 for heat-treating the strip S, a heat treatment A plating tank 6 (molten metal pot) is provided outside the furnace 2 and forms a plating bath of molten metal 8 .

The heat treatment furnace 2 is a device for heat-treating the strip S passing through the heat treatment furnace 2, and may be configured to, for example, anneal the strip S continuously. A plurality of rolls 4 are provided inside the heat treatment furnace 2 . These rolls 4 apply tension to the strip S and change the direction of the strip S to convey the strip S, thereby continuously processing the strip S. is possible. In addition, the arrow in FIG. 1 represents the conveying direction of the strip S. As shown in FIG. A reducing or non-oxidizing gas may be supplied to the interior of the heat treatment furnace 2 .

A snout 12 is provided between the outlet of the heat treatment furnace 2 and the plating bath 6 . The snout 12 has a tubular shape that forms a passage for the strip S. A lower end portion 12 a (that is, a tip portion) of the snout 12 is provided so as to be immersed in the molten metal 8 (plating bath) stored in the plating tank 6 . This prevents the outflow of gas from the heat treatment furnace 2 and the snout 12 to the outside, or the inflow of gas (for example, air) from the outside to the inside of the heat treatment furnace 2 and the snout 12 .

A plating tank 6 stores a molten metal 8 as a plating solution to form a plating bath. The type of molten metal stored in the plating tank 6 is not particularly limited. For example, when the strip S is a steel plate, it may be zinc, aluminum, or an alloy containing these.

A sink roll 10 is provided in the plating bath 6 . The strip S introduced from the inside of the heat treatment furnace 2 into the plating bath of the molten metal 8 through the snout 12 is turned upward by the sink roll 10, and the strip S with the molten metal adhering to the surface is transferred to the plating bath 6. It is designed to progress upwards.

Gas is blown toward the transported strip S downstream of the sink roll 10 in the transport direction of the strip S to adjust the thickness of the plating solution (molten metal) adhering to the strip S. wiping nozzles (not shown) may be provided.

The plating facility 100 further comprises a slag remover 20 for removing slag floating on the molten metal 8 within the snout 12 .

(Configuration of slag remover)
2A, 3A, 4A, 5A, and 6A are cross-sectional views along a horizontal plane of a slag remover according to one embodiment, respectively. Figures 2B, 3B, 4B, 5B and 6B are cross-sections BB of the slag remover shown in Figures 2A, 3A, 4A, 5A and 6A, respectively. 2C and 3C are cross-sectional views of the slag removing apparatus shown in FIGS. 2A and 3A, respectively, taken along line CC.

As shown in FIGS. 2A-6B, some embodiments of slag remover 20 include a pan 22 positioned below snout 12 to receive lower end 12a of snout 12 . The receiving plate portion 22 is supported by a stationary portion (for example, the plating bath 6) via a not-illustrated indicating means.

The receiving plate portion 22 is provided between an inner wall 26 provided inside the snout 12, an outer wall 28 provided on the outer side of the snout 12, and the inner wall 26 and the outer wall 28, and a bottom surface 24 of the receiving plate portion 22 is provided. and a bottom plate portion 23 to be formed. The inner wall 26 is provided around the circumference so as to face the inner wall surface 14 of the snout 12 at the lower end portion 12a of the snout 12 . The outer wall 28 is provided around the circumference so as to face the outer wall surface 16 of the snout 12 at the lower end portion 12a of the snout 12 . A top end 29 of the outer wall 28 is positioned higher than a top end 27 of the inner wall 26 . That is, the position of the upper end 29 of the outer wall 28 in the height direction is higher than the position of the upper end 27 of the inner wall 26 in the height direction.

The saucer portion 22 also includes an intermediate wall 30 extending upward from the bottom surface 24 of the saucer portion 22 between the inner wall 26 and the outer wall 28 . The upper end 31 of the intermediate wall 30 is positioned lower than the upper end 27 of the inner wall 26 . That is, the position in the height direction of the upper end 29 of the outer wall 28, the position in the height direction of the upper end 27 of the inner wall 26, and the position in the height direction of the upper end 31 of the intermediate wall 30 are higher in this order.

At least a portion of inner wall 26, intermediate wall 30 and bottom surface 24 define a reservoir 32 for storing molten metal.

The slag removing device 20 also has a discharge port 34 for discharging the molten metal overflowing from the reservoir 32 through the upper end 31 of the intermediate wall 30 downward from the bottom surface 24 . The discharge port 34 is located at a position equal to or lower than the upper end 31 of the intermediate wall 30 in the height direction.

The slag remover 20 may include a discharge pipe 36 for discharging the molten metal guided to the discharge port 34 to the outside of the tray portion 22 . The discharge pipe 36 is provided so as to communicate with the discharge port 34 . The discharge port 34 may be connected to the tray portion 22 at a position below the discharge port 34 .

When the slag removing device 20 is used, the position of the receiving tray 22 in the height direction of the upper end 27 of the inner wall 26 is the same as or slightly lower than the liquid level M of the molten metal 8 in the plating bath 6. is installed as follows. Further, when the slag removing device 20 is used, the receiving pan 22 is positioned so that the lower end 12a of the snout 12 is positioned between the inner wall 26 and the outer wall 28 (that is, receives the lower end 12a of the snout 12). ), and the lower end of the snout 12 is positioned between the upper end 31 of the intermediate wall 30 and the bottom surface 24 of the receiving plate 22 in the height direction.

As described above, the upper end 29 of the outer wall 28, the upper end 27 of the inner wall 26, and the upper end 31 of the intermediate wall 30, which constitute the saucer portion 22, are higher in this order in the height direction. Therefore, when the slag removing apparatus 20 is used, by installing the receiving pan 22 as described above, the molten metal on which the slag floats in the plating tank 6 flows into the reservoir 32 through the upper end 27 of the inner wall 26. . The molten metal and slag stored in the reservoir 32 overflow from the reservoir 32 through the upper end 31 of the intermediate wall 30 . Also, the molten metal and slag overflowing from the storage portion 32 are discharged downward from the receiving plate portion 22 through the discharge port 34 .

Therefore, according to the above-described configuration, the slag inside the snout 12 can be discharged to the outside of the snout 12 with a simple configuration in which the receiving plate portion 22 is arranged below the snout 12 . In addition, since the slag removing device 20 including the receiving tray 22 is separate from the snout 12, for example, by simply lifting the snout 12, it is possible to easily check the slag removal status inside the snout 12 and clean the receiving tray 22. You can Therefore, according to the above configuration, the slag in the snout 12 can be efficiently discharged with a simple configuration.

The molten metal and slag discharged downward from the tray 22 through the discharge port 34 may be returned to the plating bath through the discharge pipe 36 or the like.

In some embodiments, intermediate wall 30 has opposite ends that are each connected to outer wall 28, for example, as shown in FIGS. 2A-2C and 4A-4B. In the exemplary embodiment shown in FIGS. 2A-2C and 4A-4B, reservoir 32 is defined by inner wall 26, intermediate wall 30, outer wall 28 and bottom surface 24. As shown in FIG.

According to the configuration described above, the reservoir 32 can be formed with a simple configuration in which both ends of the intermediate wall 30 are connected to the outer wall 28 .

In some embodiments, intermediate wall 30 is formed circumferentially between inner wall 26 and outer wall 28, for example, as shown in FIGS. 3A-3C. In the exemplary embodiment shown in FIGS. 3A-3C, reservoir 32 is defined by inner wall 26 , intermediate wall 30 and bottom surface 24 .

According to the above-described configuration, the intermediate wall 30 is formed along the circumference between the inner wall 26 and the outer wall 28, so that the storage portion 32 formed between the intermediate wall 30 and the inner wall 26 is also formed along the circumference. It is formed over Therefore, the capacity of the reservoir 32 can be increased, and even if a large amount of slag is present in the snout 12, the slag can be easily discharged out of the snout 12.

In some embodiments, outlet 34 is provided in bottom surface 24 of pan 22 . In the exemplary embodiment shown in FIGS. 2A-2C, 3A-3C and 4A-4B, outlet 34 comprises an opening provided in bottom plate portion 23 .

According to the above configuration, the reservoir 32 can be formed with a simple configuration in which the discharge port 34 is provided on the bottom surface 24 of the tray 22 .

In some embodiments, intermediate wall 30 includes a tubular portion 40 having a tubular shape, eg, as shown in FIGS. 5A-5B and 6A-6B. The tube portion 40 has an upper end opening 42 forming the outlet 34 . In the exemplary embodiment shown in FIGS. 5A-5B and 6A-6B, reservoir 32 is defined by inner wall 26, intermediate wall 30, outer wall 28 and bottom surface 24. As shown in FIG.

According to the above-described configuration, the storage portion 32 and the discharge port 34 can be formed with a simple configuration in which the pipe portion 40 extending upward from the bottom surface 24 of the saucer portion 22 is provided.

In some embodiments, at least a portion of lower end 12a of snout 12 includes an inner wall 26 and an intermediate wall, for example, as shown in FIGS. 2A-2C, 3A-3C, 4A-3B, and 5A-5B. 30 to be accepted.

According to the configuration described above, the lower end 12a of the snout 12 is received between the inner wall 26 and the intermediate wall 30, so that a portion of the reservoir 32 is located outside the snout 12. As shown in FIG. Therefore, the state of slag discharge can be visually confirmed without lifting the snout 12 . Therefore, the slag in the snout 12 can be discharged more efficiently.

In some embodiments, at least a portion of lower end 12a of snout 12 is adapted to be received between outer wall 28 and intermediate wall 30, as shown, for example, in FIGS. 6A-6B.

According to the configuration described above, the lower end 12a of the snout 12 is received between the outer wall 28 and the intermediate wall 30, so that the slag floating in the molten metal stored in the reservoir 32 is pushed over the upper end 31 of the intermediate wall 30. easy to overflow through Therefore, the slag in the snout 12 can be discharged more efficiently.

7-10 are each schematic diagrams of a slag removal apparatus according to one embodiment. As described below, in some embodiments, the slag remover 20 may include a pump, suction pump, or inert gas supply to facilitate evacuation of molten metal and slag from the pan 22. .

For example, in some embodiments, as shown, for example, in FIGS. 7-9, the slag remover 20 includes a screw-type or A push paddle type pump 50 and a motor 54 for driving the pump 50 are provided. In the embodiment shown in FIGS. 7-9, the pump 50 is configured to push or suck the molten metal and slag within the discharge tube 36 towards the outlet 37 of the discharge tube 36 .

In the above-described configuration, the screw type or extrusion paddle type pump 50 is provided in the discharge path of the molten metal discharged from the receiving tray 22 through the discharge port 34. Therefore, the molten metal and slag in the discharge path are By pushing out, the slag can be discharged smoothly.

Here, in the embodiment shown in FIG. 7, intermediate wall 30 is provided on the outside of snout 12 and outlet 34 is located on the outside of snout 12, similar to the embodiment shown in FIGS. 2A-5B. The discharge pipe 36 shown in FIG. 7 includes a first portion 36a extending vertically downward from the discharge port 34, and a second portion 36a connected to the first portion 36a and extending horizontally in the plating bath. two portions 36b; A second portion 36b of the discharge tube 36 has an outlet 37 facing sideways.

8 and 9, like the embodiment shown in FIGS. 6A-6B, the intermediate wall 30 is located inside the snout 12 and the outlet 34 is located inside the snout 12. As shown in FIG.

The discharge pipe 36 shown in FIG. 8 includes a first portion 36a extending downward from the discharge port 34 along the vertical direction, and a first portion 36a connected to the first portion 36a and extending horizontally within the plating bath. It includes two portions 36b and a third portion 36c connected to the second portion 36b and extending upward in the vertical direction. A third portion 36c of the discharge tube 36 has an outlet 37 facing upwards.

The discharge pipe 36 shown in FIG. 9 includes a first portion 36a extending downward from the discharge port 34 along the vertical direction, and a first portion 36a connected to the first portion 36a and extending horizontally within the plating bath. A second portion 36b, a third portion 36c connected to the second portion 36b and extending upward in the vertical direction, and a fourth portion 36d connected to the upper end of the third portion and extending in the horizontal direction. include. A fourth portion 36d of the discharge tube 36 has an outlet 37 facing sideways.

The pump 50 shown in FIGS. 7 and 8 is a screw type pump. The pump 50 includes a rotatable shaft 51 and screw vanes 52 configured to rotate with the rotatable shaft 51 . Rotating shaft 51 is connected to the output shaft of motor 54 .

In the exemplary embodiment shown in FIG. 7, a rotating shaft 51 of pump 50 is provided to pass through outlet 34 . Further, the screw blades 52 are provided on the first portion 36 a of the discharge pipe 36 .
In the exemplary embodiment shown in FIG. 7, the pump 50 has a tubular case 71 that rotatably supports a rotatable shaft 51 . An opening through which slag or molten metal flows is appropriately provided on the lower side of the cylindrical case 71 . An inert gas supply section 68 is provided to supply inert gas so that the pump 50 does not take in the atmosphere (air) and send it out together with slag and molten metal. The inert gas supply unit 68 supplies the inert gas into the tubular case through the supply pipe 69 . The supply pipe 69 is provided with an on-off valve 70 so that the inert gas can be supplied or stopped as necessary.

In the exemplary embodiment shown in FIG. 8, the rotating shaft 51 of the pump 50 is provided to pass through the outlet 37 opening of the discharge tube 36 . Further, the screw blades 52 are provided on the third portion 36 c of the discharge pipe 36 .

The pump 50 shown in FIG. 9 is a paddle type pump. The pump 50 includes a rotatable shaft 51 and paddle vanes 56 configured to rotate with the rotatable shaft 51 . Rotating shaft 51 is connected to the output shaft of motor 54 .

In the exemplary embodiment shown in FIG. 9, the rotary shaft 51 of the pump 50 is provided to pass through the wall of the fourth portion 36d of the discharge tube 36. In the exemplary embodiment shown in FIG. Also, the paddle blades 56 are provided on the fourth portion 36 d of the discharge pipe 36 . When a paddle-type pump is employed, the direction of the discharge pipe 36 and the outlet 37 may be set so that the fluid to which the centrifugal force is applied by the paddle blades 56 is smoothly discharged from the discharge pipe 36 .

It should be noted that in embodiments in which the outlet 34 is provided on the outside of the snout 12 (eg, FIGS. 2A-5B), a pump 50 is positioned at least partially within the basin 22, as shown in FIG. Alternatively, a pump 50 may be placed at the outlet of the discharge tube 36, as shown in FIGS. Also, in embodiments in which the outlet 34 is provided inside the snout 12 (eg, FIG. 6), a pump 50 may be placed at the outlet of the outlet tube 36, as shown in FIGS. 8-9.

A motor 54 for driving the pump 50 may be provided above the outlet 34, as shown in FIGS. Alternatively, as shown in FIG. 7, the motor 54 and the discharge port 34 may be provided so as to at least partially overlap in plan view.

In the above configuration, the motor 54 for driving the pump 50 is provided above the discharge port 34, so the slag can be discharged smoothly while maintaining a compact configuration.

In some embodiments, the deslagging device 20 is configured to draw molten metal in a molten metal discharge channel (e.g., discharge tube 36) that is discharged from the pan 22 through the discharge port 34. A suction pump (not shown) may be provided. The suction pump may be installed inside the plating tank 6 or may be installed outside the plating tank 6 .

According to the above configuration, since the suction pump is provided in the discharge path of the molten metal discharged from the receiving tray 22 through the discharge port 34, the molten metal and slag in the discharge path are sucked by the suction pump, Slag can be discharged smoothly. In addition, since the suction pump has a wide range of options for placement, there is a degree of freedom in processing slag and the like discharged by the suction pump. For example, the molten liquid sucked by the suction pump can be returned to the plating bath as it is, or it can be returned to the plating bath after removing the slag with a filter or the like.

In some embodiments, for example, as shown in FIG. 10 , the slag remover 20 has an inert gas (e.g., nitrogen gas, etc.) in the discharge passage of the molten metal discharged from the tray 22 through the discharge port 34 . ) is provided.

In the exemplary embodiment shown in FIG. 10, inert gas supply 58 includes an inert gas supply tube 59 connected to exhaust tube 36 . An inert gas from an inert gas supply source (such as a gas cylinder) is supplied to the inside of the exhaust pipe 36 through an inert gas supply pipe 59 .

According to the above-described configuration, since the inert gas is supplied into the discharge path (discharge pipe 36 described above) of the molten metal discharged from the receiving pan 22 through the discharge port 34, the molten metal in the discharge path Metal and slag flow can be facilitated by gas. Therefore, slag can be discharged smoothly.

The inert gas supply unit 58 is configured to supply the inert gas to a portion of the discharge pipe 36 where the molten metal flows upward. For example, in the embodiment shown in FIG. 10, the discharge pipe 36 has a first portion 36a extending downward from the discharge port 34 along the vertical direction, and connected to the first portion 36a so as to extend horizontally in the plating bath. and a third portion 36c connected to the second portion 36b and extending upward in the vertical direction. A third portion 36c of the discharge tube 36 has an outlet 37 facing upwards. The inert gas supply 58 is configured to supply inert gas to the third portion 36c where the flow of molten metal is directed upward. Thereby, the flow of molten metal and slag in the discharge path (discharge pipe 36) can be promoted more effectively.

(Position control of tray)
11 and 12 are schematic diagrams of a plating facility 100 according to one embodiment. FIG. 13 is a schematic block diagram of a plating facility 100 according to one embodiment.

As shown in FIGS. 11-13, in some embodiments, the plating facility 100 includes first and/or second pan drives 80, 82 (drives) for moving the pan 22 of the deslagging device 20. part) (see FIGS. 12 and 13). In some embodiments, the plating facility 100 includes a liquid level detection unit 90 for detecting the liquid level of the molten metal in the plating tank 6, and the liquid level of the molten metal detected by the liquid level detection unit 90. (see FIGS. 11-13) configured to control the first or second pan drive 80, 82 based on. Also, in some embodiments, the plating facility 100 may include first and/or second snout drivers 60, 62 for moving the snout 12 (see FIGS. 11-13).

The first tray driving section 80 is configured to be able to move the tray section 22 along the vertical direction of the snout 12 . The first tray drive 80 may include, for example, an electric jack or a hydraulic jack.

The second tray drive section 82 is configured to be able to move the tray section 22 along the front-rear direction of the snout 12 . Here, the front-to-rear direction of the snout 12 is the traveling direction of the strip inside the snout 12 when viewed from above (see FIG. 12). The second tray driving section 82 may include, for example, an electric cylinder or a hydraulic cylinder.

In the exemplary embodiment shown in FIG. 12, the first tray drive section 80 is located at two locations on the sides of the plating tank 6 (front and back sides of the paper surface of FIG. The top plate 72 is connected to the upper end of the first tray driving portion 80 while being installed on a base plate 76 having rollers 78 rolling thereon. The first tray drive unit 80 has a vertical extension/contraction mechanism using a clamp mechanism or a piston/cylinder or the like. The saucer portion 22 of the slag removing device 20 is connected to the top plate 72 via a support portion 74 that extends laterally in the vertical direction. Therefore, when the top plate 72 is vertically moved by the first tray driving section 80, the tray section 22 is moved vertically accordingly. The two first tray drive units 80 may be synchronized with each other.

The second receiving plate driving portion 82 is installed on the stationary portion so as to extend along the longitudinal direction of the snout 12 , and the end portion of the second receiving plate driving portion 82 is supported by the support portion 74 . It is connected in a form that does not hinder the lifting of the portion 74 . Therefore, when the second receiving plate driving portion 82 expands and contracts in the front-rear direction of the snout 12 , the receiving plate portion 22 moves in the front-rear direction of the snout 12 accordingly. The second tray driving section 82 may be connected to the supporting sections 74 of the first tray driving section 80 at two locations, and may be provided at two locations and synchronized with each other. Alternatively, a mechanism that is connected to a part (not shown) that connects the two first tray drive units 80 and exerts a driving force is provided at one location so that the two first tray drive units 80 move simultaneously. can be

The liquid level (liquid level height) of the molten metal in the plating tank may fluctuate over time. Even in such a case, the first tray drive section 80 moves the tray section 22 vertically in accordance with fluctuations in the liquid level of the molten metal, thereby adjusting the tray section 22 to a position suitable for discharging slag. can be positioned.

Also, the snout 12 is normally provided so as to be inclined with respect to the up-down direction (vertical direction). Therefore, the relative positional relationship between the snout 12 and the receiving plate 22 in the front-rear direction changes due to the expansion and contraction of the snout 12, or due to the vertical movement of the receiving plate 22 by the first receiving plate driving unit 80, for example. sometimes. Even in such a case, by moving the receiving tray 22 in the front-rear direction by the second receiving tray driving unit 82, the receiving tray 22 can be moved in the front-rear direction in accordance with the variation in the positional relationship described above. 22 can be placed in a position suitable for slag ejection.

The snout drivers, including the first and second snout drivers 60, 62, are configured to move the snout 12 along the longitudinal direction of the snout 12 and/or along the vertical direction. In the embodiment shown in FIG. 11 , both the first and second snout driving units 60 and 62 described below are used to move the snout 12 along the longitudinal direction of the snout 12 and in the vertical direction. can be moved along the

The first snout driver 60 is configured to move the snout 12 along the length of the snout 12 . The snout 12 includes an extendable portion 13 that can be extended and retracted in the length direction of the snout 12 so that movement along the length direction of the snout 12 is permitted. The first snout drive 60 may include an electric or hydraulic jack configured to extend and retract along the length of the snout 12 . As shown in FIG. 11 , the first snout drive section 60 may be supported by the heat treatment furnace 2 and support the snout 12 .

The second snout driver 62 can move the snout 12 along the tilted direction (Z direction in FIG. 11) so as to change the tilt angle θ (see FIG. 11) of the snout 12 with respect to the vertical direction. configured as possible. The second snout drive 62 may include, for example, an electric cylinder or a hydraulic cylinder.

As shown in FIG. 11, the second snout drive 62 may be supported on a stationary portion (eg, a post 64 extending upward from the floor). The end of the second snout drive 62 is also connected to a base plate 66 having rollers that roll along the length of the snout 12 over the surface of the snout 12 . Therefore, when the second snout driving portion 62 expands and contracts in the Z direction, the inclination angle θ of the snout 12 with respect to the vertical direction is changed accordingly.

Although not specifically shown, in some embodiments, the plating facility 100 may include a third pan drive for moving the pan 22 along the width of the snout 12 . The width direction of the snout 12 substantially coincides with the width direction of the strip S.

According to the above-described configuration, the receiving plate portion 22 can be moved in the width direction of the snout 12 by the third receiving plate driving portion. Therefore, it becomes easier to position the receiving tray 22 at a position suitable for discharging the slag.

The liquid level detector 90 may include a laser or radar level meter capable of detecting the distance between the position of the liquid level detector 90 and the liquid level M of the molten metal in the plating bath 6 .

Based on the liquid level of the molten metal detected by the liquid level detection section 90, the control section 92 controls the vertical direction between the upper end 27 of the inner wall 26 of the receiving tray section 22 and the liquid level M of the molten metal in the plating bath 6. At least one of the first tray drive section 80, the second tray drive section 82, the first snout drive section 60, or the second snout drive section 62 is controlled so that the distance at is within a specified range. may be configured to

At least one of the first pan drive unit 80, the second pan drive unit 82, the first snout drive unit 60, or the second snout drive unit 62 is activated based on the detection result of the liquid level of the molten metal in the plating tank 6. Even if the liquid level (liquid level height) of the molten metal in the plating tank 6 fluctuates by moving the saucer part 22 and / or the snout 12 by one, the saucer part according to the fluctuation of the liquid level Appropriate movement of 22 facilitates positioning of tray 22 at a position suitable for slag discharge.

For example, it is assumed that the liquid level in the plating bath 6 is raised by Δy by the liquid level detector 90 . Also, let the inclination angle of the snout 12 at this time be θ (see FIG. 11 ).

In this case, it is necessary to raise the vertical positions of the receiving plate 22 and the snout 12 by Δy, which is the same amount as the increase in the liquid level. Therefore, by extending the first tray driving section 80 by Δy, the tray section 22 is raised by Δy. Also, by contracting the first snout driving portion 60 by Δy/cos θ, the height direction position of the snout 12 is raised by Δy.

In this case, the position of the lower end of the snout 12 moves toward the right side of the drawing by Δy/tan θ. Therefore, by contracting the second tray driving section 82 by Δy/tan θ, the tray section 22 is moved toward the right side of the drawing by Δy/tan θ.

In this way, based on the detection result of the liquid level detection unit 90, the amount of movement of the receiving plate 22 and the snout 12 in the vertical direction and the front-rear direction can be calculated. Therefore, even if the liquid level of the molten metal in the plating tank 6 fluctuates, the tray part 22 can be moved appropriately according to the fluctuation of the liquid level, and the tray part 22 is suitable for discharging slag. position.

The contents described in each of the above embodiments are understood as follows, for example.

(1) A slag removing device (20) according to at least one embodiment of the present invention,
A deslagging device for removing slag in a snout (12) having a lower end (12a) immersed in a molten metal plating bath, comprising:
an inner wall (26) provided around the circumference so as to face the inner wall surface (14) of the snout at the lower end of the snout;
The outer wall (29) provided along the circumference so as to face the outer wall surface (16) of the snout at the lower end of the snout and positioned higher than the upper end (27) of the inner wall ( 28) and
a receptacle (22) capable of receiving said lower end of said snout;
An intermediate wall (30) extending upward from the bottom surface (24) of the receptacle portion between the inner wall and the outer wall and having an upper end (31) positioned lower than the upper end of the inner wall. )and,
with
at least a portion of said inner wall, said intermediate wall and said bottom surface defining a reservoir (32) for storing molten metal;
a discharge port (34) for discharging the molten metal overflowing from the reservoir through the upper end of the intermediate wall downward from the bottom surface;
Prepare.

In the configuration (1) above, the outer wall, the inner wall and the intermediate wall, which constitute the receiving plate portion, have higher upper ends in this order. For this reason, by installing the receiving pan so as to receive the lower end of the snout, the molten metal on which the slag floats in the plating tank can flow into the storage section through the upper end of the inner wall, and the storage section Retained molten metal and slag can overflow the reservoir through the upper end of the intermediate wall. In addition, the overflowing molten metal and slag can be discharged downward from the tray through the discharge port. Therefore, the slag inside the snout can be discharged to the outside of the snout with a simple configuration in which the receiving plate portion is arranged below the snout. In addition, since the receiving tray is separate from the snout, it is possible to easily check the removal status of slag inside the snout and clean the receiving tray simply by lifting the snout. Therefore, according to the configuration (1) above, the slag in the snout can be efficiently discharged with a simple configuration.

(2) In some embodiments, in the configuration of (1) above,
The intermediate wall has ends respectively connected to the outer walls.

According to the configuration (2) above, the reservoir can be formed with a simple configuration in which both ends of the intermediate wall are connected to the outer wall.

(3) In some embodiments, in the configuration of (1) above,
The intermediate wall is formed around the inner wall and the outer wall.

According to the configuration (3) above, since the intermediate wall is formed along the entire circumference between the inner wall and the outer wall, the reservoir formed between the intermediate wall and the inner wall is also formed along the entire circumference. It is formed. Therefore, the capacity of the reservoir can be increased, and even when a large amount of slag is present in the snout, the slag can be easily discharged out of the snout.

(4) In some embodiments, in the configuration of any one of (1) to (3) above,
The discharge port is provided on the bottom surface of the receiving tray.

According to the configuration (4) above, the storage section can be formed with a simple configuration in which the discharge port is provided on the bottom surface of the tray section.

(5) In some embodiments, in the configuration of any one of (1) to (3) above,
said intermediate wall comprises a tubular portion (40) having a tubular shape;
Said tube has an upper end opening (42) forming said outlet.

According to the configuration (5) above, it is possible to form the storage section and the discharge port with a simple configuration in which the tube section extending upward from the bottom surface of the receiving tray section is provided.

(6) In some embodiments, in the configuration of any one of (1) to (5) above,
The slag remover is
At least a portion of the lower end of the snout is configured to be received between the inner wall and the intermediate wall.

According to the configuration (6) above, since the lower end of the snout is received between the inner wall and the intermediate wall, part of the reservoir is positioned outside the snout. Therefore, the state of slag discharge can be visually confirmed without lifting the snout. Therefore, the slag in the snout can be discharged more efficiently.

(7) In some embodiments, in the configuration of (3) above,
The slag remover is
At least a portion of the lower end of the snout is configured to be received between the outer wall and the intermediate wall.

According to the configuration (7) above, since the lower end of the snout is received between the outer wall and the intermediate wall, the slag floating on the molten metal stored in the storage section overflows through the upper end of the intermediate wall. Cheap. Therefore, the slag in the snout can be discharged more efficiently.

(8) In some embodiments, in any of the above configurations (1) to (7),
The slag remover is
a screw-type or paddle-type pump (50) provided in a discharge channel for the molten metal discharged from the receiving tray through the discharge port;
a motor (54) provided above the outlet for driving the pump;
Prepare.

According to the above configuration (8), a screw type or extrusion paddle type pump is provided in the discharge path of the molten metal discharged from the receiving tray through the discharge port, so that the molten metal and slag in the discharge path are The slag can be discharged smoothly by pushing it out. Moreover, since the motor for driving the pump is provided above the discharge port, the slag can be smoothly discharged while the structure is compact.

(9) In some embodiments, in any of the above configurations (1) to (7),
The slag remover is
A suction pump configured to suck the molten metal in the molten metal discharge channel (for example, the discharge pipe 36 described above) discharged from the receiving pan through the discharge port is provided.

According to the above configuration (9), since the suction pump is provided in the discharge path of the molten metal discharged from the tray through the discharge port, the molten metal and slag in the discharge path are sucked by the suction pump. , the slag can be discharged smoothly.

(10) In some embodiments, in the configuration of any one of (1) to (9) above,
The slag remover is
An inert gas supply part (58) configured to supply an inert gas into the discharge channel of the molten metal discharged from the receiving pan through the discharge port is provided.

According to the configuration (10) above, since the inert gas is supplied into the discharge passage of the molten metal discharged from the receiving tray through the discharge port, the flow of the molten metal and slag in the discharge passage is suppressed. It can be facilitated by gas. Therefore, slag can be discharged smoothly.

(11) A plating facility according to at least one embodiment of the present invention,
a plating bath (6) for storing molten metal;
a snout (12) having a lower end that is immersed in the molten metal in the plating bath;
A slag remover (20) according to any one of the above (1) to (10) configured to remove slag in the snout;
Prepare.

In the configuration (11) above, the outer wall, the inner wall, and the intermediate wall that constitute the receiving plate portion have higher upper ends in this order. For this reason, by installing the saucer portion so as to receive the lower end portion of the snout, the molten metal on which the slag floats in the plating tank can flow into the storage portion through the upper end of the inner wall, and the storage portion Retained molten metal and slag can overflow the reservoir through the upper end of the intermediate wall. In addition, the molten metal and slag overflowing in this manner can be discharged downward from the receiving tray through the discharge port. Therefore, the slag inside the snout can be discharged to the outside of the snout with a simple configuration in which the receiving plate portion is arranged below the snout. In addition, since the receiving tray is separate from the snout, it is possible to easily check the removal status of slag inside the snout and clean the receiving tray simply by lifting the snout. Therefore, according to the configuration (11) above, the slag in the snout can be efficiently discharged with a simple configuration.

(12) In some embodiments, in the configuration of (11) above,
The plating equipment is
A drive section (for example, the above-described first tray drive section 80) is provided for moving the tray section at least in the vertical direction.

According to the configuration (12) above, the tray can be moved vertically by the driving section. Therefore, even if the liquid level (liquid level height) of the molten metal in the plating tank fluctuates, by moving the tray vertically according to the fluctuation of the liquid level, the tray can be moved to the level of the slag. It can be placed in a position suitable for ejection.

(13) In some embodiments, in the configuration of (11) or (12) above,
The plating equipment is
A driving section (for example, the second receiving tray driving section 82 described above) for moving the receiving tray at least in the forward and rearward direction of the snout is provided.

According to the configuration (13) above, the receiving plate can be moved in the front-rear direction (direction in which the band plate advances in the snout when viewed from above) by the drive unit. Therefore, even if the relative positional relationship between the snout and the receiving plate changes in the front-rear direction due to thermal expansion and contraction of the snout, by moving the receiving plate in the front-rear direction according to the change in the positional relationship, The pan can be placed in a position suitable for slag discharge.

(14) In some embodiments, in the configuration of any one of (11) to (13) above,
The plating equipment is
A drive unit is provided for moving the receiving plate at least in the width direction of the snout.

According to the configuration (14) above, the receiver can be moved in the width direction of the snout by the driving section. Therefore, it becomes easier to position the receiving tray at a position suitable for discharging the slag.

(15) In some embodiments, in the configuration of any one of (12) to (14) above,
The plating equipment is
a liquid level detector (90) for detecting the liquid level of the molten metal in the plating tank;
Based on the liquid level detected by the liquid level detection unit, the driving is performed so that the vertical distance between the upper end of the inner wall and the liquid surface of the molten metal in the plating tank is within a specified range. a control unit (92) configured to control the unit.

According to the above configuration (15), the drive unit moves the receiving tray based on the detection result of the liquid level of the molten metal in the plating tank. ) fluctuates, by moving the tray appropriately according to the fluctuation of the liquid level, the tray can be easily positioned at a position suitable for slag discharge.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes modifications of the above-described embodiments and modes in which these modes are combined as appropriate.

As used herein, expressions such as "in a certain direction", "along a certain direction", "parallel", "perpendicular", "center", "concentric" or "coaxial", etc. express relative or absolute arrangements. represents not only such arrangement strictly, but also the state of being relatively displaced with a tolerance or an angle or distance to the extent that the same function can be obtained.
For example, expressions such as "identical", "equal", and "homogeneous", which express that things are in the same state, not only express the state of being strictly equal, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
Further, in this specification, expressions representing shapes such as a quadrilateral shape and a cylindrical shape not only represent shapes such as a quadrilateral shape and a cylindrical shape in a geometrically strict sense, but also within the range in which the same effect can be obtained. , a shape including an uneven portion, a chamfered portion, and the like.
Moreover, in this specification, the expressions “comprising”, “including”, or “having” one component are not exclusive expressions excluding the presence of other components.

2 Heat Treatment Furnace 4 Roll 6 Plating Tank 8 Molten Metal 10 Sink Roll 12 Snout 12a Lower End 13 Expandable Section 14 Inner Wall 16 Outer Wall 20 Slag Remover 22 Pan 23 Bottom Plate 24 Bottom 26 Inner Wall 27 Upper End 28 Outer Wall 29 Upper End 30 intermediate wall 31 upper end 32 reservoir 34 discharge port 36 discharge pipe 36a first portion 36b second portion 36c third portion 36d fourth portion 37 outlet 40 pipe portion 42 upper end opening 50 pump 51 rotary shaft 52 screw blade 54 motor 56 paddle Blade 58 Inert gas supply part 59 Inert gas supply pipe 60 First snout driving part 62 Second snout driving part 64 Column 66 Base plate 68 Inert gas supply part 69 Supply pipe 70 On-off valve 71 Cylindrical case 72 Top Plate 74 Supporting portion 76 Base plate 78 Roller 80 First tray drive unit 82 Second tray drive unit 90 Liquid level detection unit 92 Control unit 100 Plating equipment M Liquid surface S Band plate

Claims (15)

A slag removal apparatus for removing slag in a snout having a lower end immersed in a molten metal plating bath, comprising:
an inner wall provided around the circumference so as to face the inner wall surface of the snout at the lower end of the snout;
an outer wall provided over a circumference so as to face the outer wall surface of the snout at the lower end portion of the snout and having an upper end positioned higher than the upper end of the inner wall;
a receptacle capable of receiving the lower end of the snout;
an intermediate wall extending upward from the bottom surface of the saucer portion between the inner wall and the outer wall and having an upper end positioned lower than the upper end of the inner wall;
with
at least a portion of the inner wall, the intermediate wall, and the bottom surface define a reservoir for storing molten metal;
A slag removing device provided with a discharge port for discharging molten metal overflowing from the reservoir through the upper end of the intermediate wall downward from the bottom surface. 2. The slag remover of claim 1, wherein said intermediate wall has opposite ends each connected to said outer wall. 2. The slag removing apparatus according to claim 1, wherein said intermediate wall is formed around said inner wall and said outer wall. The slag removing device according to any one of claims 1 to 3, wherein the discharge port is provided on the bottom surface of the receiving tray. the intermediate wall includes a tubular portion having a tubular shape;
2. The slag removing device according to claim 1 , wherein said pipe portion has an upper end opening forming said outlet. 6. A deslag device according to any preceding claim, wherein at least a portion of the lower end of the snout is configured to be received between the inner wall and the intermediate wall. 4. The slag remover of claim 3, wherein at least a portion of said lower end of said snout is configured to be received between said outer wall and said intermediate wall. a screw-type or paddle-type pump provided in a discharge channel for the molten metal discharged from the receiving tray through the discharge port;
a motor provided above the outlet for driving the pump;
8. The deslagging device according to any one of claims 1 to 7, comprising: 8. The suction pump according to any one of claims 1 to 7, further comprising a suction pump configured to suck the molten metal in the molten metal discharge channel discharged from the receiving tray through the discharge port. Slag remover. 10. The inert gas supply unit according to any one of claims 1 to 9, further comprising an inert gas supply unit configured to supply an inert gas into the discharge passage of the molten metal discharged from the receiving tray through the discharge port. The slag remover according to . a plating tank for storing molten metal;
a snout having a lower end that is immersed in the molten metal in the plating bath;
11. A slag removal device according to any one of the preceding claims, adapted to remove slag in the snout;
plating equipment. 12. The plating equipment according to claim 11, further comprising a drive section for moving the receiving tray section at least in the vertical direction. 13. The plating equipment according to claim 11 or 12, further comprising a drive unit for moving the receiving plate at least in the front-rear direction of the snout. 14. The plating equipment according to any one of claims 11 to 13, further comprising a drive unit for moving the receiving plate at least in the width direction of the snout. a liquid level detection unit for detecting the liquid level of the molten metal in the plating tank;
Based on the liquid level detected by the liquid level detection unit, the driving is performed so that the vertical distance between the upper end of the inner wall and the liquid surface of the molten metal in the plating tank is within a specified range. a control unit configured to control the unit;
The plating facility according to claim 12, comprising:

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