CN116065111A - Slag removal device and plating equipment - Google Patents

Abstract

The invention provides a slag removing device and a plating apparatus capable of effectively discharging slag in a furnace nose with a simple structure. A slag removing apparatus for removing slag in a furnace nose having a lower end portion immersed in a molten metal plating bath, comprising: a receiving tray portion comprising: an inner wall provided throughout the circumference so as to face an inner wall surface of the furnace nose; and an outer side wall provided throughout the circumference so as to face the outer wall surface of the furnace nose, and having an upper end higher than the upper end of the inner side wall; the receiving tray part can receive the lower end part of the furnace nose; and an intermediate wall extending upward from the bottom surface of the receiving tray portion between the inner wall and the outer wall and having an upper end lower than an upper end of the inner wall, wherein at least a portion of the inner wall, the intermediate wall, and the bottom surface define a reservoir portion for storing molten metal, and the slag removing device includes a discharge port for discharging molten metal overflowing from the reservoir portion via the upper end of the intermediate wall toward a position lower than the bottom surface.

Description

Slag removal device and plating equipment

technical field

The present invention relates to a slag removal device and a plating equipment.

Background technique

In the plating equipment for plating metal strips (steel strips, etc.) Surrounds a cylindrical snout with a plate. The nose is provided such that its front end (lower end) is immersed in the molten metal in the coating tank, thereby suppressing the intrusion of air into the inside of the nose and the leakage of atmospheric gas inside the nose to the outside.

The inside of the nose is usually filled with atmospheric gas such as reducing gas or non-oxidizing gas, and the oxidation of the molten metal passing through the strip or plating bath inside the nose is suppressed, but actually there may be a trace amount of oxygen. Therefore, inside the snout, the molten metal in the plating bath may react with oxygen to form metal oxide slag (slag) on the surface of the plating bath. When the slag floating in the plating bath adheres to the strip, it may cause defects in plating and may impair the quality of the strip. Therefore, it is necessary to discharge the slag generated inside the nose to the outside of the nose.

Patent Document 1 discloses a plating apparatus in which a mechanism for discharging slag inside a nose is provided at the lower end of the nose to the outside of the nose. In this device, an outflow chamber is formed by the nose wall at the lower end of the nose and the floor and overflow wall connected to the nose wall. nasal as well as outflow chamber.

prior art literature

patent documents

Patent Document 1: Japanese Patent No. 6329621

Contents of the invention

The problem to be solved by the invention

In the apparatus of Patent Document 1, the slag discharge mechanism for discharging the slag inside the nose is provided integrally with the nose, and the structure is complicated. In addition, since the slag discharge mechanism is integrally provided with the furnace nose, it is difficult to confirm the discharge status of the slag, or it is difficult to perform inspection and cleaning, so it is difficult to efficiently discharge the slag.

In view of the above circumstances, an object of at least one embodiment of the present invention is to provide a slag removal device and a plating facility capable of efficiently discharging slag in a nose with a simple structure.

Solution to the problem

The slag removal device of at least one embodiment of the present invention is used to remove slag in a snout having a lower end immersed in a molten metal plating bath, wherein,

The slag removal device includes a receiving pan and an intermediate wall,

The receiving plate portion includes: an inner wall provided over a circumference so as to face the inner wall surface of the lower end of the nose; and an outer wall to face the lower end of the nose. The outer wall surface of the furnace nose is provided over a circle, and has an upper end located higher than the upper end of the inner wall, and the receiving plate can receive the lower end of the furnace nose,

The intermediate wall extends upward from the bottom surface of the receiving tray portion between the inner side wall and the outer side wall, and has an upper end located lower than the upper end of the inner side wall,

at least a part of the inner side wall, the intermediate wall, and the bottom surface define a storage portion for storing molten metal,

The slag removal device includes a discharge port for discharging the molten metal overflowing from the storage portion through the upper end of the intermediate wall toward a position lower than the bottom surface.

In addition, the plating equipment of at least one embodiment of the present invention has:

Plating tanks, which are used to store molten metal;

a nose having a lower end portion of the molten metal immersed in the plating tank; and

The above-mentioned slag removal device is configured to remove slag in the furnace nose.

Invention effect

According to at least one embodiment of the present invention, there are provided a slag removal device and a plating facility capable of efficiently discharging slag in a nose with a simple structure.

Description of drawings

FIG. 1 is a schematic configuration diagram of a plating facility according to an embodiment.

Fig. 2A is a cross-sectional view along a horizontal plane of the slag removal device according to one embodiment.

Fig. 2B is a diagram showing a B-B cross section of the slag removal device shown in Fig. 2A.

Fig. 2C is a diagram showing a C-C cross section of the slag removal device shown in Fig. 2A.

Fig. 3A is a cross-sectional view along a horizontal plane of the slag removal device according to one embodiment.

Fig. 3B is a diagram showing a B-B cross section of the slag removal device shown in Fig. 3A.

Fig. 3C is a diagram showing a C-C section of the slag removal device shown in Fig. 3A.

FIG. 4A is a cross-sectional view along a horizontal plane showing a slag removal device according to one embodiment.

Fig. 4B is a diagram showing a B-B cross section of the slag removal device shown in Fig. 4A.

Fig. 5A is a cross-sectional view along a horizontal plane of the slag removal device according to one embodiment.

Fig. 5B is a diagram showing a B-B cross section of the slag removal device shown in Fig. 5A.

FIG. 6A is a cross-sectional view along a horizontal plane showing a slag removal device according to one embodiment.

Fig. 6B is a diagram showing a B-B cross section of the slag removal device shown in Fig. 6A.

FIG. 7 is a schematic diagram of a slag removal device according to one embodiment.

FIG. 8 is a schematic diagram of a slag removal device according to one embodiment.

FIG. 9 is a schematic diagram of a slag removal device according to one embodiment.

Fig. 10 is a schematic diagram of a slag removal device according to one embodiment.

FIG. 11 is a schematic diagram of a plating facility according to an embodiment.

FIG. 12 is a schematic diagram of a plating facility according to an embodiment.

FIG. 13 is a schematic block diagram of a plating facility according to one embodiment.

Explanation of reference signs

2 heat treatment furnace

4 rolls

6 plating tank

8 molten metal

10 sinking rollers

12 Nose

12a lower end

13 telescopic part

14 inner wall surface

16 outer wall

20 Slag removal device

22 Undertake the plate department

23 Bottom plate

24 Bottom

26 inner wall

27 upper end

28 outer wall

29 upper end

30 middle wall

31 upper end

32 storage department

34 outlet

36 discharge pipe

36a Part I

36b Part II

36c Part III

36d part four

37 exit

40 Tube

42 upper opening

50 pumps

51 axis of rotation

52 helical blades

54 motor

56 propeller blades

58 Inactive gas supply unit

59 Inert gas supply tube

60 First furnace nose drive unit

62 Second furnace nose drive unit

64 columns

66 pallets

68 Inactive gas supply unit

69 Supply piping

70 On-off valve

71 Cylindrical shell

72 top plate

74 Supporting part

76 pallets

78 roller

80 The first to undertake the disk drive unit

82 The second receiving disk drive unit

90 Liquid level detection department

92 Control Department

100 plating equipment

M level

S with plate.

Detailed ways

Hereinafter, several embodiments of the present invention will be described with reference to the drawings. However, dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.

(Structure of Plating Equipment)

FIG. 1 is a schematic configuration diagram of a plating facility to which a slag removal device according to an embodiment is applied. As shown in FIG. 1 , the plating facility 100 is equipment 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. and a plating tank 6 (molten metal kettle), which is arranged outside the heat treatment furnace 2, and forms a plating bath of molten metal 8.

The heat treatment furnace 2 is an apparatus for heat-treating the strip S passing through the heat treatment furnace 2 , and may be configured to continuously anneal the strip S, for example. A plurality of rolls 4 are installed inside the heat treatment furnace 2 . By applying tension to the strip S by these rollers 4 or changing the direction of the strip S, the strip S can be conveyed, whereby the strip S can be processed continuously. In addition, the arrow in FIG. 1 has shown the conveyance direction of the strip S. As shown in FIG. A reducing or non-oxidizing gas may be supplied into the heat treatment furnace 2 .

A nose 12 is provided between the exit portion of the heat treatment furnace 2 and the plating tank 6 . The snout 12 has a cylindrical shape forming a passage of the strip plate S. As shown in FIG. The lower end portion 12 a (that is, the front end 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 . Thereby, the outflow of gas from the inside of the heat treatment furnace 2 and the nose 12 to the outside, or the inflow of gas (for example, air) from the outside of the heat treatment furnace 2 and the nose 12 to the inside are prevented.

Molten metal 8 as a plating solution is stored in the plating tank 6 to form a plating bath. The type of molten metal stored in the coating tank 6 is not particularly limited, but for example, when the strip S is a steel sheet, it may be zinc or aluminum, or an alloy containing them.

In addition, a sink roll 10 is provided in the plating tank 6 . The strip S that is introduced into the coating bath of molten metal 8 from the inside of the heat treatment furnace 2 through the furnace nose 12 is turned upward by the sinking roller 10, and the strip S with molten metal attached to the surface is directed to the coating bath 6. March above.

A device for blowing gas toward the strip S to be conveyed to measure the thickness of the plating solution (molten metal) adhering to the strip S may be provided at a position on the downstream side of the sinking roller 10 in the conveyance direction of the strip S. Adjusted wiper nozzle (not shown).

The plating facility 100 further includes a slag removing device 20 for removing slag floating on the molten metal 8 in the nose 12 .

(Structure of slag removal device)

2A, 3A, 4A, 5A, and 6A are each a cross-sectional view along a horizontal plane of a slag removal device according to an embodiment. 2B, 3B, 4B, 5B, and 6B are diagrams showing B-B cross sections of the slag removal apparatus shown in FIGS. 2A, 3A, 4A, 5A, and 6A, respectively. 2C and 3C are diagrams showing the C-C cross section of the slag removal device shown in FIGS. 2A and 3A , respectively.

As shown in FIGS. 2A to 6B , the slag removal device 20 according to some embodiments includes a receiving pan 22 disposed below the nose 12 so as to receive the lower end 12 a of the nose 12 . The receiving pan part 22 is supported by the stationary part (for example, the plating tank 6) via the support mechanism which is not shown in figure.

The receiving plate portion 22 includes: an inner side wall 26, which is arranged on the inner side of the furnace nose 12; an outer side wall 28, which is arranged on the outer side of the furnace nose 12; and a bottom plate portion 23, which is arranged between the inner side wall 26 and the outer side wall 28, And form the bottom surface 24 of the receiving plate portion 22 . The inner side wall 26 is provided over a circumference so as to face the inner wall surface 14 of the nose 12 of the lower end portion 12 a of the nose 12 . The outer wall 28 is provided over the entire circumference so as to face the outer wall surface 16 of the nose 12 of the lower end portion 12 a of the nose 12 . The upper end 29 of the outer side wall 28 is positioned higher than the upper end 27 of the inner side wall 26 . That is, the position in the height direction of the upper end 29 of the outer side wall 28 is higher than the position in the height direction of the upper end 27 of the inner side wall 26 .

Furthermore, the receiving pan portion 22 includes an intermediate wall 30 extending upward from the bottom surface 24 of the receiving pan portion 22 between the inner side wall 26 and the outer side wall 28 . The upper end 31 of the intermediate wall 30 is located lower than the upper end 27 of the inner side wall 26 . That is, the height position of the upper end 29 of the outer side wall 28 , the height direction position of the upper end 27 of the inner side wall 26 , and the height direction position of the upper end 31 of the intermediate wall 30 are from high to low.

A storage portion 32 for storing molten metal is defined by the inner side wall 26 , the intermediate wall 30 , and at least a part of the bottom surface 24 .

In addition, the slag removal device 20 has a discharge port 34 for discharging molten metal overflowing from the storage portion 32 via the upper end 31 of the intermediate wall 30 toward a position below the bottom surface 24 . The discharge port 34 is located at the same position as or lower than the upper end 31 of the intermediate wall 30 in the height direction.

The slag removal device 20 may include a discharge pipe 36 for discharging the molten metal guided to the discharge port 34 to the outside of the receiving pan portion 22 . A discharge pipe 36 is provided to communicate with the discharge port 34 . The discharge port 34 may be connected to the receiving plate portion 22 at a position below the discharge port 34 .

When the slag removal device 20 is in use, the position in the height direction of the upper end 27 of the inner side wall 26 of the receiving pan 22 is the same as or slightly lower than the liquid level M of the molten metal 8 in the plating tank 6 mode settings. In addition, when the slag removal device 20 is in use, the receiving plate portion 22 is positioned so that the lower end 12a of the nose 12 is located between the inner side wall 26 and the outer side wall 28 (that is, in such a way as to receive the lower end 12a of the nose 12 ). ), and in the height direction, the lower end of the furnace nose 12 is located between the upper end 31 of the intermediate wall 30 and the bottom surface 24 of the receiving plate portion 22 .

As mentioned 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 constituting the receiving tray 22 are positioned from high to low in the height direction. Therefore, when the slag removing device 20 is in use, by providing the receiving pan 22 as described above, the molten metal with slag floating 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 storage part 32 overflow from the storage part 32 through the upper end 31 of the intermediate wall 30 . In addition, the molten metal and slag overflowing from the storage part 32 are discharged toward the lower side of the receiving pan part 22 through the discharge port 34 .

Therefore, according to the above structure, the slag inside the nose 12 can be discharged to the outside of the nose 12 with a simple structure in which the receiving pan portion 22 is disposed below the nose 12 . In addition, since the slag removal device 20 including the receiving pan 22 is a separate body from the furnace nose 12, for example, only by lifting the furnace nose 12, it is possible to easily check the state of slag removal inside the furnace nose 12, or perform Cleaning of the disk unit 22 is accepted. Therefore, according to the above structure, the slag in the nose 12 can be efficiently discharged with a simple structure.

It should be noted that the molten metal and slag discharged toward the lower side of the receiving pan portion 22 through the discharge port 34 may return to the plating bath through the above-mentioned discharge pipe 36 or the like.

In several embodiments, for example, as shown in FIGS. 2A to 2C and FIGS. 4A to 4B , the intermediate wall 30 has both ends connected to the outer wall 28 , respectively. In the exemplary embodiment shown in FIGS. 2A-2C and FIGS. 4A-4B , storage portion 32 is defined by inner side wall 26 , intermediate wall 30 , outer side wall 28 , and bottom surface 24 .

According to the above-mentioned structure, the storage part 32 can be formed with the simple structure which connects the both ends of the intermediate wall 30 to the outer side wall 28. As shown in FIG.

In several embodiments, for example, as shown in FIGS. 3A to 3C , the intermediate wall 30 is formed over the entire circumference between the inner wall 26 and the outer wall 28 . In the exemplary embodiment shown in FIGS. 3A-3C , reservoir 32 is bounded by inner side wall 26 , intermediate wall 30 , and bottom surface 24 .

According to the above configuration, the intermediate wall 30 is formed over the entire circumference between the inner wall 26 and the outer wall 28 , so the storage portion 32 formed between the intermediate wall 30 and the inner wall 26 is also formed over the entire circumference. Therefore, the capacity of the storage portion 32 can be increased, and even when a large amount of slag exists in the nose 12 , the slag can be easily discharged out of the nose 12 .

In several embodiments, the discharge port 34 is disposed on the bottom surface 24 of the receiving tray portion 22 . In the exemplary embodiment shown in FIGS. 2A to 2C , FIGS. 3A to 3C , and FIGS. 4A to 4B , the discharge port 34 has an opening provided in the bottom plate portion 23 .

According to the above structure, the storage part 32 can be formed with the simple structure which provided the discharge port 34 in the bottom surface 24 of the receiving pan part 22. As shown in FIG.

In several embodiments, for example, as shown in FIGS. 5A-5B and FIGS. 6A-6B , the intermediate wall 30 includes a tube portion 40 having a tubular shape. The pipe portion 40 has an upper end opening 42 forming a discharge port 34 . In the exemplary embodiment shown in FIGS. 5A-5B and FIGS. 6A-6B , storage portion 32 is defined by inner side wall 26 , intermediate wall 30 , outer side wall 28 , and bottom surface 24 .

According to the above-mentioned structure, the storage part 32 and the discharge port 34 can be formed with the simple structure provided with the pipe part 40 extended upward from the bottom surface 24 of the receiving pan part 22. As shown in FIG.

In several embodiments, for example, as shown in FIGS. 2A to 2C , FIGS. 3A to 3C , FIGS. 4A to 3B and FIGS. at least part of .

According to the above structure, since the lower end part 12a of the nose 12 is received between the inner side wall 26 and the intermediate wall 30, a part of the storage part 32 is located outside the nose 12. As shown in FIG. Therefore, even without raising the nose 12, the discharge state of the slag can be confirmed visually. Therefore, the slag in the furnace nose 12 can be discharged more efficiently.

In several embodiments, for example, as shown in FIGS. 6A to 6B , at least a portion of the lower end portion 12 a of the nose 12 is received between the outer side wall 28 and the middle wall 30 .

According to the above structure, the lower end 12 a of the nose 12 is received between the outer wall 28 and the middle wall 30 , so that the slag floating on the molten metal stored in the storage part 32 easily overflows through the upper end 31 of the middle wall 30 . Therefore, the slag in the nose 12 can be discharged more efficiently.

7 to 10 are schematic diagrams of a slag removal device according to an embodiment, respectively. As will be described below, in several embodiments, the slag removal device 20 may include a pump, a suction pump, or an inert gas supply unit for promoting discharge of molten metal and slag from the receiving pan portion 22 .

For example, in several embodiments, for example, as shown in FIGS. A discharge flow path of the molten metal; and a motor 54 that drives the pump 50 . In the embodiment shown in FIGS. 7 to 9 , the pump 50 is configured to push out or suck out molten metal and slag in the discharge pipe 36 toward the outlet 37 of the discharge pipe 36 .

In the above-mentioned structure, the screw-type or paddle-type pump 50 is provided in the discharge path of the molten metal discharged from the receiving pan portion 22 through the discharge port 34, so that the molten metal and the molten metal in the discharge path are pushed out by the pump 50. slag, so that the slag can be discharged smoothly.

Here, in the embodiment shown in FIG. 7 , like the embodiment shown in FIGS. 2A to 5B , the intermediate wall 30 is provided outside the nose 12 , and the discharge port 34 is located outside the nose 12 . The discharge pipe 36 shown in FIG. 7 includes: a first portion 36a extending downward from the discharge port 34 in the vertical direction; and a second portion 36b connected to the first portion 36a and extending horizontally in the plating bath. direction extension. The second portion 36b of the discharge pipe 36 has an outlet 37 facing sideways.

In addition, in the embodiment shown in FIGS. 8 and 9 , like the embodiment shown in FIGS. 6A to 6B , the intermediate wall 30 is provided inside the nose 12 , and the discharge port 34 is located inside the nose 12 .

The discharge pipe 36 shown in FIG. 8 includes: a first portion 36a extending downward from the discharge port 34 in the vertical direction; a second portion 36b connected to the first portion 36a and extending horizontally in the plating bath. and a third portion 36c connected to the second portion 36b and extending upward in the up-down direction. The third portion 36c of the discharge pipe 36 has an outlet 37 facing upward.

The discharge pipe 36 shown in FIG. 9 includes: a first portion 36a extending downward from the discharge port 34 in the vertical direction; a second portion 36b connected to the first portion 36a and extending horizontally in the plating bath. The third part 36c is connected to the second part 36b and extends upward and downward; and the fourth part 36d is connected to the upper end of the third part and extends horizontally. The fourth portion 36d of the discharge pipe 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 rotating shaft 51 and a helical blade 52 configured to rotate together with the rotating shaft 51 . The rotating shaft 51 is connected to an output shaft of a motor 54 .

In the exemplary embodiment shown in FIG. 7 , the axis of rotation 51 of the pump 50 is disposed through the discharge port 34 . In addition, the helical blade 52 is 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 cylindrical case 71 that rotatably supports the rotating shaft 51 . An opening through which slag or molten metal flows is appropriately provided on the lower side of the cylindrical casing 71 . An inert gas supply unit 68 for supplying an inert gas is provided so that the pump 50 does not entrain atmospheric air (air) and sends it out together with slag and molten metal. The inert gas supply unit 68 supplies the inert gas into the cylindrical casing through the supply pipe 69 . The supply pipe 69 is provided with an on-off valve 70, and the inert gas can be supplied or stopped as needed.

In the exemplary embodiment shown in FIG. 8 , the axis of rotation 51 of the pump 50 is arranged through the opening of the outlet 37 of the discharge pipe 36 . In addition, the helical blade 52 is 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 rotating shaft 51 and paddle blades 56 configured to rotate together with the rotating shaft 51 . The rotating shaft 51 is connected to an output shaft of a motor 54 .

In the exemplary embodiment shown in FIG. 9 , the rotation shaft 51 of the pump 50 is arranged to pass through the pipe wall of the fourth portion 36 d of the discharge pipe 36 . In addition, the paddle blade 56 is provided on the fourth portion 36d of the discharge pipe 36 . In the case of a paddle-type pump, the directions of the discharge pipe 36 and the outlet 37 may be set so that the fluid to which centrifugal force is imparted by the paddle blades 56 is smoothly discharged from the discharge pipe 36 .

It should be noted that, in the embodiment in which the outlet 34 is provided outside the nose 12 (for example, FIGS. 2A to 5B ), as shown in FIG. A pump 50 may be provided at the outlet of the discharge pipe 36 as shown in FIGS. 8 to 9 . In addition, in the embodiment in which the discharge port 34 is provided inside the nose 12 (for example, FIG. 6 ), a pump 50 may be provided at the outlet of the discharge pipe 36 as shown in FIGS. 8 to 9 .

As shown in FIGS. 7 to 9 , a motor 54 for driving the pump 50 may be provided above the discharge port 34 . Alternatively, as shown in FIG. 7 , the motor 54 and the discharge port 34 may at least partially overlap each other in plan view.

In the above-mentioned structure, since the motor 54 for driving the pump 50 is provided above the discharge port 34, it has a compact structure and can discharge slag smoothly.

In several embodiments, the slag removal device 20 may include a suction pump configured to suck the molten metal in the discharge flow path (for example, the discharge pipe 36 ) of the molten metal discharged from the receiving pan portion 22 via the discharge port 34 . (not shown). The suction pump may be installed in the plating tank 6 or may be installed outside the plating tank 6 .

According to the above-mentioned structure, since the suction pump is provided in the discharge path of the molten metal discharged from the receiving pan portion 22 through the discharge port 34, the molten metal and slag in the discharge path can be sucked by the suction pump, so that the molten metal can be smoothly discharged. scum. In addition, since the suction pump has a wide range of options for placement, it has a degree of freedom in the handling of slag and the like discharged from the suction pump. For example, the molten liquid sucked by the suction pump may be returned to the plating bath as it is, or the molten liquid sucked by the suction pump may be returned to the plating bath after removing slag by a filter or the like.

In several embodiments, for example, as shown in FIG. 10 , the slag removal device 20 is configured to supply an inert gas (for example, nitrogen gas, etc.) ) of the inert gas supply unit 58.

In the exemplary embodiment shown in FIG. 10 , the inert gas supply unit 58 includes an inert gas supply pipe 59 connected to the discharge pipe 36 . Inert gas from an inert gas supply source (a gas bottle, etc.) is supplied into the discharge pipe 36 through the inert gas supply pipe 59 .

According to the above-mentioned structure, since the inert gas is supplied into the discharge path (the above-mentioned discharge pipe 36) of the molten metal discharged from the receiving pan portion 22 through the discharge port 34, the gas can be used to promote the separation of the molten metal and slag in the discharge path. flow. Therefore, slag can be discharged smoothly.

In addition, the inert gas supply part 58 is comprised so that the inert gas may be supplied to the part of the discharge pipe 36 in which the flow of molten metal of the discharge pipe 36 faces upward. For example, in the embodiment shown in FIG. 10 , the discharge pipe 36 includes: a first portion 36a extending downward from the discharge port 34 in an up-down direction; a second portion 36b connected to the first portion 36a, and The inside of the bath extends in the horizontal direction; and the third part 36c, which is connected to the second part 36b, extends upward in the vertical direction. The third portion 36c of the discharge pipe 36 has an outlet 37 facing upward. The inert gas supply unit 58 is configured to supply the inert gas to the third portion 36c where the flow of the molten metal is directed upward. Thereby, the flows of molten metal and slag in the discharge path (discharge pipe 36 ) can be more effectively promoted.

(Receives position control of the plate)

11 and 12 are schematic diagrams of a plating facility 100 according to an embodiment. FIG. 13 is a schematic block diagram of a plating facility 100 according to one embodiment.

As shown in FIGS. 11 to 13 , in several embodiments, the plating equipment 100 includes a first and/or second receiving pan drive unit 80 for moving the receiving pan portion 22 of the slag removal device 20 , 82 (drive part) (refer to FIG. 12, FIG. 13). In addition, in several embodiments, the plating equipment 100 may also include: a liquid level detection unit 90 for detecting the liquid level of the molten metal in the plating tank 6; The liquid level of the molten metal detected by the level detection unit 90 controls the first or second susceptor drive unit 80, 82 (see FIGS. 11 to 13 ). In addition, in some embodiments, the plating equipment 100 may also include the first and/or second nose drive units 60 and 62 for moving the nose 12 (see FIGS. 11 and 13 ).

The first receiving pan drive unit 80 is configured to be able to move the receiving pan portion 22 in the vertical direction of the nose 12 . The first tray drive unit 80 may include, for example, an electric jack or a hydraulic jack.

The second receiving pan drive unit 82 is configured to be able to move the receiving pan portion 22 in the front-rear direction of the nose 12 . Here, the front-back direction of the nose 12 refers to the direction in which the strip travels in the nose 12 in plan view (see FIG. 12 ). The second tray drive unit 82 may include, for example, an electric cylinder, a hydraulic cylinder, or the like.

In the exemplary embodiment shown in FIG. 12 , the first receiving plate driving unit 80 is located at two positions on the side of the plating tank 6 (the front and the back side of the paper in FIG. 12 ), and The roller 78 rolls on the stationary part of the position on the platen 76 , and is connected to the top plate 72 at the upper end of the first tray driving part 80 . The first tray drive unit 80 has a mechanism that expands and contracts in the vertical direction using a clamp mechanism, a piston, a cylinder, etc., and the top plate 72 can be raised and lowered by this mechanism. The receiving pan part 22 of the slag removal apparatus 20 is connected to the top plate 72 via the support part 74 extended in the up-down direction on the side. Therefore, the top plate 72 is moved in the up-down direction by the first receiving pan drive unit 80 , and the receiving pan unit 22 is moved in the up-down direction accordingly. The first tray drive units 80 at the two locations may also be synchronized with each other.

The second receiving disc driving part 82 is arranged on the stationary part in a manner extending along the front-rear direction of the furnace nose 12, and the end of the second receiving disc driving part 82 is connected to the support in a form that does not hinder the lifting of the supporting part 74. Section 74. Therefore, the receiving pan portion 22 moves in the front-back direction of the nose 12 in accordance with the expansion and contraction of the second pan drive unit 82 in the front-back direction of the nose 12 . The second tray drive unit 82 may also be connected to the support portions 74 of the first tray drive unit 80 at two locations, located at two locations, and synchronized with each other. Alternatively, it may be connected to an unillustrated member that connects the first receiving tray driving parts 80 at two locations, and the mechanism for exerting the driving force may be set at one location, and the first receiving tray driving parts 80 at the two locations may be connected to each other. move at the same time.

The liquid level (liquid level) of the molten metal in the plating tank may fluctuate with the passage of time. Even in such a case, by moving the receiving pan 22 in the vertical direction according to the fluctuation of the liquid level of the molten metal by the first receiving pan driving unit 80, the receiving pan 22 can be positioned at a position suitable for discharging slag. Location.

In addition, the snout 12 is normally provided so that it may incline with respect to an up-down direction (vertical direction). Therefore, the relative position of the furnace nose 12 and the receiving plate portion 22 in the front-rear direction varies due to the expansion and contraction of the nose 12 or the movement in the vertical direction of the receiving plate portion 22 by the first receiving plate drive unit 80 described above. Changes in the relationship. Even in such a case, by moving the receiving pan part 22 in the front-rear direction by the second receiving pan drive part 82, the receiving pan part 22 can be moved in the front-back direction according to the change in the above-mentioned positional relationship. The receiving pan portion 22 is positioned at a position suitable for discharging slag.

The nose drive unit including the first and second nose drive units 60 and 62 is configured to move the nose 12 in the front-rear direction and/or in the up-down direction of the nose 12 . It should be noted that, in the embodiment shown in FIG. 11 , the nose 12 can be moved along the front and rear direction of the nose 12 and Move in the up and down direction.

The first nose drive unit 60 is configured to be able to move the nose 12 along the longitudinal direction of the nose 12 . It should be noted that the snout 12 includes a stretchable portion 13 that can expand and contract in the longitudinal direction of the snout 12, and the movement of the snout 12 along the longitudinal direction is allowed. The first nose driving unit 60 may include an electric jack or a hydraulic jack configured to be able to expand and contract along the longitudinal direction of the nose 12 . As shown in FIG. 11 , the first nose driving unit 60 may be supported by the heat treatment furnace 2 to support the nose 12 .

The second nose drive unit 62 is configured to be able to move the nose 12 in an inclined direction (Z direction in FIG. 11 ) to change the inclination angle θ of the nose 12 with respect to the vertical direction (see FIG. 11 ). The second nose driving part 62 may also include, for example, an electric cylinder or a hydraulic cylinder.

As shown in FIG. 11, the 2nd nose drive part 62 may be supported by the stationary part (for example, the column 64 extended upward from a floor surface). Moreover, the end part of the 2nd nose drive part 62 is connected to the table 66 provided with the roller which rolls along the longitudinal direction of the nose 12 on the surface of the nose 12. As shown in FIG. Therefore, the inclination angle θ of the nose 12 with respect to the vertical direction is changed accordingly by the expansion and contraction of the second nose drive unit 62 in the above-mentioned Z direction.

Although not particularly shown, in some embodiments, the plating equipment 100 may include a third receiving pan drive unit for moving the receiving pan portion 22 in the width direction of the snout 12 . In addition, the width direction of the snout 12 and the strip width direction of the strip S substantially correspond.

According to the above structure, the receiving pan part 22 can be moved in the width direction of the nose 12 by the 3rd receiving pan drive part. Therefore, it is easy to position the receiving pan portion 22 at a position suitable for discharging the slag.

The liquid level detection unit 90 may include a laser or radar level gauge capable of detecting the distance between the position of the liquid level detection unit 90 and the liquid surface M of the molten metal in the plating tank 6 .

The control unit 92 may also be configured to control the first receiving plate driving unit 80, the second receiving plate driving unit 82, the first nose driving unit 60, and the second receiving plate driving unit 80 based on the liquid level of the molten metal detected by the liquid level detecting unit 90. At least one of the nose driving parts 62 is configured such that the vertical distance between the upper end 27 of the inner side wall 26 of the receiving pan part 22 and the liquid surface M of molten metal in the plating tank 6 falls within a predetermined range.

Based on the detection result of the liquid level of the molten metal in the plating tank 6, the first receiving disc driving part 80, the second receiving disc driving part 82, the first furnace nose driving part 60 and the second furnace nose driving part 62 are used At least one of the receiving pans 22 and/or the snout 12 is moved, so that even if the liquid level (liquid level) of the molten metal in the coating tank 6 fluctuates, the receiving pan is moved according to the fluctuation of the liquid level. The portion 22 is moved appropriately, so that the receiving pan portion 22 can be easily positioned at a position suitable for discharging the slag.

For example, it is assumed that the liquid level in the plating tank 6 has increased by Δy by the liquid level detection unit 90 . In addition, let the inclination angle of the nose 12 at this time be θ (refer FIG. 11).

In this case, it is necessary to raise the positions of the receiving pan portion 22 and the nose 12 in the vertical direction by the same amount of Δy as the rise of the liquid level. Then, by extending the first receiving pan drive unit 80 by Δy, the receiving pan portion 22 is raised by Δy. In addition, by shortening the first nose drive unit 60 by Δy/cosθ, the position in the height direction of the nose 12 is increased by Δy.

In this case, the position of the lower end of the snout 12 is shifted toward the right side of the drawing by Δy/tanθ. Then, by shortening the second receiving tray drive unit 82 by Δy/tanθ, the receiving tray portion 22 is moved toward the right side of the drawing by Δy/tanθ.

Thus, based on the detection result of the liquid level detection part 90, the movement amount of the receiving pan part 22 and the nose 12 in the up-down direction and the front-back direction can be calculated. Therefore, even when the liquid level of the molten metal in the coating tank 6 fluctuates, the receiving pan part 22 can be appropriately moved according to the fluctuation of the liquid level, and the receiving pan part 22 can be positioned at a position suitable for discharging slag. Location.

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

(1) The slag removal device 20 of at least one embodiment of the present invention for removing slag in the snout 12 having the lower end portion 12a immersed in the molten metal plating bath, wherein,

The slag removal device includes a receiving pan portion 22 and an intermediate wall 30,

The receiving plate portion 22 includes: an inner side wall 26, which is arranged over a circle in a manner facing the inner wall surface 14 of the furnace nose in the lower end portion of the furnace nose; The outer wall surface 16 of the furnace nose in the lower end portion is arranged over a circle, and has an upper end 29 located higher than the upper end 27 of the inner wall, and the receiving plate portion can receive the furnace. said lower end of the nose,

The intermediate wall 30 extends upward from the bottom surface 24 of the receiving tray portion between the inner wall and the outer wall, and has an upper end 31 located lower than the upper end of the inner wall,

At least a part of the inner side wall, the middle wall, and the bottom surface define a storage portion 32 for storing molten metal,

The slag removal device includes a discharge port 34 for discharging the molten metal overflowing from the storage portion through the upper end of the intermediate wall toward a position below the bottom surface.

In the structure of (1) above, the positions of the upper ends of the outer wall, the inner wall and the middle wall constituting the receiving tray portion are from high to low. Therefore, by providing the receiving pan portion so as to receive the lower end portion of the nose, the molten metal with slag floating in the plating tank can flow into the storage portion through the upper end of the inner side wall and be stored in the storage portion. Molten metal and slag can escape from the reservoir via the upper end of the intermediate wall. In addition, the molten metal and slag overflowing in this way can be discharged toward the lower side of the receiving pan part through the discharge port. Therefore, the slag inside the nose can be discharged out of the nose with a simple structure in which the receiving pan is disposed below the nose. In addition, since the receiving pan and the nose are separated, for example, only by lifting the nose, it is possible to easily check the state of slag removal inside the nose or clean the receiving pan. Therefore, according to the structure of (1) above, the slag in the nose can be efficiently discharged with a simple structure.

(2) In some embodiments, on the basis of the structure of (1) above,

The middle wall has two ends respectively connected to the outer side walls.

According to the structure of (2) above, the storage part can be formed with the simple structure which connects the both ends of an intermediate wall to an outer side wall.

(3) In several embodiments, on the basis of the structure of (1) above,

The intermediate wall is formed over a circumference between the inner wall and the outer wall.

According to the configuration of (3) above, since the intermediate wall is formed over the entire circumference between the inner wall and the outer wall, the storage portion formed between the intermediate wall and the inner wall is also formed over the entire circumference. Therefore, the capacity of the storage part can be increased, and even when a large amount of slag exists in the nose, the slag can be easily discharged out of the nose.

(4) In several embodiments, on the basis of any structure in the above (1) to (3),

The discharge port is provided on the bottom surface of the receiving tray.

According to the structure of (4) above, the storage part can be formed with the simple structure which provided the discharge port in the bottom surface of the receiving pan part.

(5) In several embodiments, on the basis of any one of the above (1) to (3),

Said intermediate wall comprises a tube portion 40 having a tubular shape,

The tube portion has an upper end opening 42 forming the discharge opening.

According to the structure of (5) above, the storage part and the discharge port can be formed with the simple structure provided with the pipe part extended upward from the bottom surface of a receiving pan part.

(6) In several embodiments, on the basis of any one of the above (1) to (5),

The slag removal device is configured to receive at least a portion of the lower end of the nose between the inner side wall and the intermediate wall.

According to the structure of said (6), since the lower end part of a nose is received between the inner side wall and the intermediate wall, a part of storage part is located in the outer side of a nose. Therefore, even without raising the nose, the discharge state of the slag can be confirmed visually. Therefore, the slag in the furnace nose can be discharged more efficiently.

(7) In some embodiments, on the basis of the structure of (3) above,

The slag removal device is configured to receive at least a portion of the lower end of the nose between the outer side wall and the intermediate wall.

According to the structure of (7) above, since the lower end part of the nose is received between the outer side wall and the intermediate wall, the slag floating on the molten metal stored in the storage part easily overflows through the upper end of the intermediate wall. Therefore, the slag in the furnace nose can be discharged more efficiently.

(8) In several embodiments, on the basis of any one of the above (1) to (7),

The slag removal device has:

a screw-type or paddle-type pump 50 provided in a discharge flow path of the molten metal discharged from the receiving pan through the discharge port; and

The motor 54 is provided above the discharge port and drives the pump.

According to the structure of (8) above, since the discharge path of the molten metal discharged from the receiving pan through the discharge port is provided with a screw type or a paddle type pump, the molten metal and slag in the discharge path are pressed out by using the pump. , so that the slag can be discharged smoothly. In addition, since the motor for driving the pump is provided above the discharge port, it has a compact structure and can discharge slag smoothly.

(9) In several embodiments, on the basis of any one of the above (1) to (7),

The slag removal device includes a suction pump configured to discharge the molten metal in a discharge channel (for example, the above-mentioned discharge pipe 36 ) of the molten metal discharged from the receiving pan through the discharge port. The molten metal is attracted.

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

(10) In several embodiments, on the basis of any one of the above (1) to (9),

The slag removal device includes an inert gas supply unit 58 configured to supply inert gas into a discharge channel of the molten metal discharged from the receiving pan through the discharge port. gas.

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

(11) The plating equipment of at least one embodiment of the present invention has:

Plating tank 6, which is used to store molten metal;

a snout 12 having a lower end portion of the molten metal immersed in the plating bath; and

The slag removal device 20 according to any one of (1) to (10) above is configured to remove slag in the nose.

In the structure of (11) above, the positions of the upper ends of the outer wall, the inner wall and the middle wall constituting the receiving tray portion are in descending order from high to low. Therefore, by providing the receiving pan portion so as to receive the lower end portion of the nose, the molten metal with slag floating in the plating tank can flow into the storage portion through the upper end of the inner side wall and be stored in the storage portion. Molten metal and slag can escape from the reservoir via the upper end of the intermediate wall. In addition, the molten metal and slag overflowing in this way can be discharged toward the lower side of the receiving pan part through the discharge port. Therefore, the slag inside the nose can be discharged out of the nose with a simple structure in which the receiving pan is disposed below the nose. In addition, since the receiving pan and the nose are separated, for example, only by lifting the nose, it is possible to easily check the state of slag removal inside the nose or clean the receiving pan. Therefore, according to the structure of (11) above, the slag in the nose can be efficiently discharged with a simple structure.

(12) In several embodiments, on the basis of the structure of (11) above,

The plating equipment includes a driving unit (for example, the above-mentioned first receiving pan driving unit 80 ) for moving the receiving pan unit at least in the vertical direction.

According to the structure of said (12), it is possible to move the receiving pan part to an up-down direction by a drive part. Therefore, even if the liquid level (liquid level) of the molten metal in the coating tank fluctuates, the receiving pan can be positioned at a position suitable for the molten metal by moving the receiving pan in the vertical direction according to the fluctuation of the liquid level. The location of the slag discharge.

(13) In several embodiments, on the basis of the structure of (11) or (12) above,

The plating equipment includes a driving unit (for example, the above-mentioned second receiving pan driving unit 82 ) for moving the receiving pan portion at least in the front-rear direction of the nose.

According to the configuration of (13) above, the receiving pan portion can be moved in the front-rear direction (the direction in which the strip travels in the nose when viewed from above) by the driving portion. Therefore, even if the relative positional relationship between the nosepiece and the receiving pan portion changes in the front-rear direction due to thermal expansion and contraction of the nosepiece, etc., by moving the receiving pan portion in the front-back direction according to the change in the positional relationship, The receiving pan portion can be positioned at a position suitable for discharging slag.

(14) In several embodiments, on the basis of any one of the above (11) to (13),

The plating equipment includes a driving unit for moving the receiving pan at least in a width direction of the nose.

According to the structure of said (14), it is possible to move the receiving pan part in the width direction of a snout by a drive part. Therefore, it is easy to position the receiving pan portion at a position suitable for discharging the slag.

(15) In several embodiments, on the basis of any one of the above (12) to (14),

The plating equipment has:

a liquid level detection unit 90 for detecting the liquid level of the molten metal in the plating tank; and

The control unit 92 is configured to control the drive unit based on the liquid level detected by the liquid level detection unit so that the upper end of the inner wall is in contact with the liquid surface of the molten metal in the coating tank. The distance in the vertical direction is within a predetermined range.

According to the structure of (15) above, based on the detection result of the liquid level of the molten metal in the coating tank, the receiving pan is moved by the drive unit, so even if the liquid level (liquid level) of the molten metal in the coating tank fluctuates, In the case of slag, by appropriately moving the receiving pan according to the fluctuation of the liquid level, it is easy to position the receiving pan at a position suitable for discharging the slag.

The embodiments of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments, and includes modifications to the above-mentioned embodiments and forms obtained by appropriately combining these embodiments.

In this specification, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" indicate relative or absolute configurations. Strictly speaking, it shows such an arrangement, and also shows a state of being relatively displaced by an angle and a distance to the extent that a tolerance or the same function can be obtained.

For example, expressions such as "same", "equal", and "homogeneous" that indicate the state of equality of things not only represent a state of being strictly equal, but also represent a state of difference to the extent that there is a tolerance or the same function can be obtained.

In addition, in this specification, expressions such as a quadrangular shape and a cylindrical shape not only refer to shapes such as a quadrangular shape and a cylindrical shape in a geometrically strict sense, but also include concave and convex portions within the range where the same effect can be obtained. , the shape of the chamfer, etc.

In addition, in the present specification, an expression of "having", "including" or "having" one component is not an exclusive expression excluding the existence of other components.

Claims (15)

1. A slag removal device for removing slag in a snout having a lower end portion immersed in a molten metal plating bath, wherein, The slag removal device includes a receiving pan and an intermediate wall, The receiving plate portion includes: an inner wall provided over a circumference so as to face the inner wall surface of the lower end of the nose; and an outer wall to face the lower end of the nose. The outer wall surface of the furnace nose is provided over a circle, and has an upper end located higher than the upper end of the inner wall, and the receiving plate can receive the lower end of the furnace nose, The intermediate wall extends upward from the bottom surface of the receiving tray portion between the inner side wall and the outer side wall, and has an upper end located lower than the upper end of the inner side wall, at least a part of the inner side wall, the intermediate wall, and the bottom surface define a storage portion for storing molten metal, The slag removal device includes a discharge port for discharging the molten metal overflowing from the storage portion through the upper end of the intermediate wall toward a position lower than the bottom surface. 2. The slag removal device according to claim 1, wherein: The middle wall has two ends respectively connected to the outer side walls. 3. The slag removal device according to claim 1, wherein: The intermediate wall is formed over a circumference between the inner wall and the outer wall. 4. The slag removal apparatus according to any one of claims 1 to 3, wherein: The discharge port is provided on the bottom surface of the receiving tray. 5. The slag removal apparatus according to any one of claims 1 to 3, wherein: The intermediate wall includes a tube portion having a tubular shape, The pipe portion has an upper end opening forming the discharge port. 6. The slag removal apparatus according to any one of claims 1 to 5, wherein: The slag removal device is configured to receive at least a portion of the lower end of the nose between the inner side wall and the intermediate wall. 7. The slag removal apparatus according to claim 3, wherein: The slag removal device is configured to receive at least a portion of the lower end of the nose between the outer side wall and the intermediate wall. 8. The slag removal apparatus according to any one of claims 1 to 7, wherein: The slag removal device has: a screw type or a paddle type pump provided in a discharge flow path of the molten metal discharged from the receiving pan through the discharge port; and A motor is provided above the discharge port and drives the pump. 9. The slag removal apparatus according to any one of claims 1 to 7, wherein: The slag removal device includes a suction pump configured to suck the molten metal in a discharge flow path of the molten metal discharged from the receiving pan through the discharge port. 10. The slag removal apparatus according to any one of claims 1 to 9, wherein: The slag removal device includes an inert gas supply unit configured to supply an inert gas into a discharge channel of the molten metal discharged from the receiving pan through the discharge port. 11. A plating apparatus wherein, The plating equipment has: Plating tanks, which are used to store molten metal; a nose having a lower end portion of the molten metal immersed in the plating tank; and The slag removal device according to any one of claims 1 to 10, which is configured to remove slag in the nose. 12. The plating apparatus according to claim 11, wherein, The plating equipment includes a driving unit for moving the receiving pan at least in an up-down direction. 13. Plating apparatus according to claim 11 or 12, wherein, The plating equipment includes a drive unit for moving the receiving pan at least in the front-rear direction of the nose. 14. Plating apparatus according to any one of claims 11 to 13, wherein, The plating equipment includes a driving unit for moving the receiving pan at least in a width direction of the nose. 15. Plating apparatus according to any one of claims 12 to 14, wherein, The plating equipment has: a liquid level detection section for detecting the liquid level of the molten metal in the plating tank; and A control unit configured to control the drive unit based on the liquid level detected by the liquid level detection unit so that the upper end of the inner wall is vertically aligned with the liquid surface of the molten metal in the coating tank. The distance in the direction is within the specified range.

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