KR101150375B1 - Bright annealin gfurnace including heating furnace and bright annealing method with the annealing furnace - Google Patents

Abstract

The present invention provides a light annealing furnace and a light annealing method for light annealing the strip. According to the present invention, the strip is conveyed along the longitudinal direction to the inner space of the heating furnace. The upper burner is installed in the upper part of the inner space of the heating furnace, and the lower burner is installed in the lower part to provide radiant heat to the transported strip to heat the strip. The strip is directly exposed to the space provided with the upper and lower burners, and the radiant heat provided by the burners is transferred directly to the strip so that the strip is heated efficiently.

Bright Annealing, Furnace, Strip, Burner, Heat Treatment

Description

Bright annealing furnace including a heating furnace and a bright annealing method using the same {BRIGHT ANNEALIN GFURNACE INCLUDING HEATING FURNACE AND BRIGHT ANNEALING METHOD WITH THE ANNEALING FURNACE}

The present invention relates to an apparatus and method for bright annealing a strip, and more particularly, to a light annealing furnace and a light annealing method including a horizontal heating furnace.

In general, BRIGHT ANNEALIN GFURNACE is made of cold rolled strip (STRIP) to prevent deoxidation on the surface of steel and to perform annealing in an air stream of reducing or non-oxidizing gas so as not to lose metallic luster. By cooling, the glossiness of the steel surface is not lost after cooling, but it has the characteristic to remain intact for the first time. In the bright annealing furnace (HEATING FURNACE) is a core facility to determine the material of the metal by providing a heat treatment by providing radiant heat to the cold-rolled steel sheet. Specifically, the furnace serves to heat the steel to recrystallize and grow the crushed tissue, thereby removing the internal stress of the steel and making the tissue with appropriate toughness.

1 is a view showing a heating furnace of a conventional bright annealing furnace.

Referring to FIG. 1, a conventional heating furnace 1 is installed outside a muffle 3 and a muffle 3 disposed in an inner space, and a burner nozzle having an open end thereof located in the inner space. 4) is included. The burner nozzle 4 burns the combustion gas to provide heat to the strip S located inside the muffle 3 to heat-treat the strip S.

According to the conventional furnace, since the strip is located inside the muffle, the burner nozzle is not directly exposed to the space provided. Because of this, the heat generated from the burner nozzle is not provided directly to the strip, but indirectly through the muffle, thereby causing a problem that heat transfer to the strip does not occur efficiently. In addition, although nickel (Ni) alloy, which is a heat resistant steel, is used in the manufacture of the muffle, its life is not long because the muffle is directly exposed to the combustion of the burner nozzle having an open end. Therefore, there is a problem that a maintenance cost is repeatedly generated due to the replacement of the muffle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bright annealing furnace and a bright annealing method which can produce strips with excellent metallic luster.

SUMMARY OF THE INVENTION An object of the present invention is to provide a light annealing furnace and a light annealing method which can efficiently heat transfer to a strip.

An object of the present invention to provide a bright annealing furnace and a light annealing method that can reduce the maintenance cost.

An object of the present invention is to provide a light annealing furnace and a light annealing method that can improve the productivity of the strip.

The present invention provides a light annealing furnace for light annealing a strip. According to an embodiment of the present invention, the bright annealing furnace includes a heating furnace for heating a strip to be transferred, wherein the heating furnace is disposed in the longitudinal direction and has a body having an inner space; A strip conveying part provided in the inner space and moving the strip carried into the inner space along a longitudinal direction of the body; And a burner nozzle unit for heating by providing radiant heat to the strip.

The burner nozzle unit includes upper burners spaced apart from each other along the longitudinal direction of the body, the upper burners being provided in the upper portion of the strip conveying unit, the upper burners are different from the longitudinal direction of the body. The burner nozzle unit further includes lower burners spaced apart from each other along the longitudinal direction of the body, the lower burners being different from the longitudinal direction of the body.

The burner nozzle part includes a plurality of burners provided in the inner space such that a length direction thereof is different from a length direction of the body. Each of the burners has a longitudinal direction perpendicular to the longitudinal direction of the body.

The body has a first side wall disposed along the first direction; And a second side wall disposed to face the first side wall, wherein the upper burners penetrate the first side wall to the inner space, and the lower burners penetrate the second side wall to the inner space. do.

Each upper burner is provided such that its end is adjacent to the second side wall in the inner space, and each lower burner is provided such that its end is adjacent to the first side wall in the inner space. The upper burner and the lower burner are characterized in that their ends are blocked.

The burner nozzle unit includes a burner body for igniting combustion gas; And a radiant tube surrounding the burner body, the radiant tube having a combustion space in which combustion of the combustion gas occurs, wherein the radiant tube is provided in the internal space and separates the combustion space from the internal space. It is characterized by. The radiant tube has a ceramic material.

The heating furnace is disposed between the adjacent lower burners, respectively, and further comprises a safety member installed in the vertical direction from the bottom of the inner cavity, each of the safety members provided the upper end is higher than the upper end of the lower burners do.

The strip conveying unit is spaced apart from each other, and includes shafts for supporting the strip, each of the shafts are disposed to correspond to the upper end of the safety member.

The heating furnace is provided in the inner space, and further comprises a temperature sensor for measuring the temperature of the radiant heat.

The light annealing furnace is disposed in front of the heating furnace and has a strip carrying part for carrying the strip into the heating furnace; A strip discharging unit disposed at the rear of the heating furnace and discharging the strip; It is disposed between the heating furnace and the upper strip strip portion, and further comprises a cooling treatment for cooling the heated strip.

The cooling treatment unit comprises a first cooling furnace for primary cooling the heated strip; And a second cooling furnace disposed between the first cooling furnace and the strip discharging unit and configured to perform secondary cooling of the first cooled strip.

The strip inlet and the strip outlet each form a transport passage connected to the inner space, and each of the transport passages is provided with a blocking member for blocking outflow of gas from the inner space, and the blocking member is the gas. Is inclined to move to the inner wall of the transfer passage along the blocking member, one end thereof is installed on the inner wall of the transfer passage, characterized in that closer to the other end and closer to the heating furnace.

The present invention also provides a light annealing method for light annealing a strip. According to an embodiment of the present invention, the light annealing method is a light annealing method comprising a heating step of heating the strip by providing a radiant heat to the strip (transmission) to the inner space of the heating furnace, the radiant heat is burner nozzle And the strip is directly exposed to the space where the burner nozzle is provided and moves.

Providing said radiant heat at the top of said strip. Providing the radiant heat at the bottom of the strip.

According to the present invention, a strip excellent in metallic luster can be produced.

Further, according to the present invention, since the strip is directly exposed to the space provided with the radiant heat, heat can be efficiently transferred to the strip.

Moreover, according to this invention, the maintenance cost of a bright annealing furnace can be reduced.

In addition, according to the present invention, the heat treatment takes place effectively, so that the productivity of the strip can be improved.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to FIGS. 2 to 7. Embodiments of the invention may be modified in various forms, the scope of the invention should not be construed as limited to the following embodiments. This example is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings are exaggerated to emphasize a more clear description.

2 is a cross-sectional view showing a bright annealing furnace according to an embodiment of the present invention.

Referring to FIG. 2, the bright annealing furnace 10 is disposed in front of the processing unit 200 and has a strip loading unit 100 and an inner space for carrying strips Srtip and S into the processing unit 200. It includes a process processing unit 200 for performing a heat treatment of the strip to be transferred to the internal space, and a strip carrying unit 500 disposed in the rear of the process processing unit 200 for carrying out the strip (S) from the process processing unit 200. do. The process processor 200 includes a heating furnace 300 that provides radiant heat to heat the strip S, and a cooling processor 400 that cools the heated strip S. FIG. Hereinafter, each structure is demonstrated in detail.

3A is a cross-sectional view briefly showing the structure of a strip carrying part, FIG. 3B is a perspective view showing an opening of the strip carrying part, FIG. 3C is a view showing a moving path of atmospheric gas, and FIG. 3D is a view showing a moving path of external air. .

3A to 3D, the strip loading unit 100 is disposed in front of the processing unit 200 and receives the strip S from a winding unit (not shown) winding the strip S. The strip (S) is carried in to 200. The strip carry-in part 100 includes an carry-in body 110 having a transfer passage 111 and a support frame 140 for supporting the carry-in body 110.

The carry-in body 110 is formed with a conveying passage 111 through which the strip S is conveyed in the longitudinal direction, and the conveying passage 111 is connected to the internal space of the process processor 200. According to the embodiment, the conveying passage 111 has a width larger than the width of the strip S to be conveyed, and is provided as a passage having a rectangular cross section. The transfer passage 111 varies the height of the transfer passage 111 along the longitudinal direction of the carrying body 110. Specifically, the height of the transfer passage 111a at the position where the blocking member 120 to be installed is installed is lower than the height of the transfer passage 111b at the position where the shaft 112 is installed. The transfer path 111 is preferably made as low as possible in order to reduce the outflow of the atmosphere gas from the internal space of the process processing unit 200, and to reduce the inflow of external air. However, since the space in which the shaft 112 supporting the strip S is installed must be provided in the conveying passage 111, the height of the conveying passage 111 is blocked at the position 111b at which the shaft 112 is installed. It is stepped so as to be provided higher than the height at the position 111a where the member 120 is installed. Openings 114a and 114b are formed at both ends of the carrying-in body 110, respectively, and the strip S is carried into the conveying path 111 through the opening 114a formed at one end thereof, and the opening 114b formed at the other end is opened. The strip S is carried out from the conveying path 111 through. A guide roller 113 for guiding and supporting the strip S to be transported is installed outside the opening 114a through which the strip S is carried into the transport passage 111. The guide rollers 113 are provided as a pair of rollers facing each other in the up and down direction, and are installed to contact the upper and lower surfaces of the strips S, respectively. The transfer passage 111 is provided with a blocking member 120 for blocking the inflow and outflow of gas and external air, and a shaft 112 supporting the strip S to be transferred.

Blocking member 120 is the first blocking member 121 provided to reduce the outflow of gas from the inner space of the processing unit 200, the second blocking member provided to reduce the inflow of external air into the transport passage 111 (122), and a blocking door 123 for blocking the transfer passage 111.

The first blocking member 121 is disposed in the transfer passage 111 close to the opening 114a into which the strip S is introduced, and the gas staying in the process processor 200 flows out through the transfer passage 111. In this case, the flow of gas is disturbed to reduce the consumption of gas. The first blocking member 120 includes a plate that is provided to be inclined in a direction toward the processing unit 200 toward the inside of the transfer passage 111 from the wall providing the transfer passage 111. Since the first blocking member 121 is provided to be inclined toward the process processor 200, the outflowing gas is moved to the inner wall of the transfer passage 111 along the first blocking member 121 and stays in a space adjacent to the inner wall. (See Fig. 3c)

According to an embodiment, the first blocking member 121 includes an upper outflow blocking plate 121a installed at an upper portion of the transport passage 111 and a lower outflow blocking plate 121b installed at a lower portion of the transport passage 111. do. The lower outflow blocking plate 121b is disposed to be symmetrical with the upper outflow blocking plate 121a based on a line passing through the longitudinal center of the transport passage 111. Specifically, the upper outflow blocking plate 121a is provided so that one end is coupled to the upper wall of the transfer passage 111 and the other end is adjacent to the upper surface of the strip S to be transferred. The lower outflow blocking plate 121b is provided such that one end is coupled to the lower wall of the transfer passage 111 and the other end is adjacent to the bottom surface of the strip S.

According to another embodiment, a plurality of first blocking members 121 are provided along the longitudinal direction of the transfer passage 111, and each of the first blocking members 121 is disposed to be parallel to each other. As a result, the gas flowing into the spaced space between the end of the plate 121 and the strip S is hindered by the flow of the plate 121 located in the rear, the transport passage along the plate 120 located in the rear Move to the inner wall of 111. In this way, the outflow of the gas is sharply reduced because the outflow of the gas is interrupted by the first blocking member 120 (see FIG. 3C).

According to another embodiment, the plate of the first blocking member 121 is installed so that one end is in contact with the wall of the conveying passage 111, the plate 121 is the conveying passage 111 by the drive of the blocking member drive unit 124. And rotatable about a point of contact with the wall. Thus, while the process is in progress, the plate 121 may be inclined in the direction toward the process treatment unit 200 to hinder the outflow of gas, while the process is not in progress, parallel with the longitudinal direction of the transfer passage 111. The plate 121 may be rotated so as to facilitate maintenance of the strip loading part 100.

The second blocking member 122 is installed in the transport passage 111 to be located on the opposite side of the process processing unit 200 on the basis of the first blocking member 121, when external air flows into the process processing unit through the transport passage. , Obstruct the flow of outside air. The second blocking member 122 has a larger gap than the gap between the first blocking member 121 and the process processor 200. The second blocking member 122 includes a plate 122 that is provided to be inclined in a direction further away from the first blocking member 121 toward the inside of the conveying passage 111 from the wall providing the conveying passage 111. Since the second blocking member 122 is provided to be inclined in a direction further away from the first blocking member 121, the introduced external air is moved to the inner wall of the transfer passage 111 along the second blocking member 122, and the inner wall Stay in the space adjacent to it (see Figure 3c).

According to an embodiment, the second blocking member 122 includes an upper inlet blocking plate 122a installed at an upper portion of the conveying passage 111 and a lower inlet blocking plate 122b provided at a lower portion of the conveying passage 111. do. The lower inflow blocking plate 122b is disposed to be symmetrical with the upper inflow blocking plate 122a about a line passing through the longitudinal center of the transfer passage 111. Specifically, one end of the upper inflow blocking plate 122a is provided to be coupled to the top wall of the transfer passage 111 and to be adjacent to the top surface of the strip S to which the other end is transferred. The lower inflow blocking plate 122b is provided such that one end is coupled to the lower wall of the transfer passage 111 and the other end is adjacent to the lower surface of the strip S.

According to another embodiment, a plurality of second blocking members 122 are provided along the longitudinal direction of the transfer passage 111, and each of the second blocking members 122 is disposed to be parallel to each other. As a result, the gas flowing into the spaced space between the end of the second blocking member 122 and the strip S is blocked by the flow of the second blocking member 122 located at the rear thereof, and the second located at the rear thereof. The inner wall of the transfer passage 111 is moved along the blocking member 122. As such, the flow of external air introduced into the transfer passage 111 is hindered by the flow of the second blocking member 122, and thus the amount of external air introduced is drastically reduced. (See FIG. 3C.)

According to another embodiment, the plate of the second blocking member 122 is installed so that one end is in contact with the wall of the transfer passage, the plate 122 is the wall of the transfer passage 111 by the drive of the blocking member drive unit 124. It is provided to be rotatable about a point in contact with the. Therefore, the plate 122 may be provided to be inclined in a direction further away from the first blocking member 121 while the process is in progress to reduce the inflow of external air, and the length of the conveying passage 111 during the process is not in progress. The plate 121 may be rotated to be parallel to the direction to facilitate the maintenance of the strip loading part 100.

The blocking door 123 is disposed between the process processor 200 and the first blocking member 121 to block the transfer passage 111. Specifically, the blocking door 123 is installed to be adjacent to the stepped area on the transport passage (111a) having a low height. The blocking door 123 has a rectangular plate shape having a width corresponding to the width of the conveying passage 111 and is disposed perpendicular to the longitudinal direction of the conveying passage 111. The upper end of the blocking door 123 is provided with a link member 125 connecting the blocking door 123 and the blocking door driver 126 in the vertical direction. The link member 125 opens and closes the transfer path 111 by driving the blocking door 123 in the vertical direction by the driving of the blocking door driver 126. The blocking door 123 prevents air intrusion from the outside by blocking the transfer passage 111 when it is necessary to temporarily suspend the process due to emergency stop or other causes. The lower portion of the blocking door 123 is made of graphite or graphite felt so that a flaw does not occur on the surface of the strip S even when it is in contact with the strip S.

The shaft 112 supports the strip S to be transferred through the transfer passage 111. The shaft 112 is installed in the width direction of the transfer passage 111 and is provided to be rotatable by a driving unit (not shown). The shaft 112 is installed on a conveyance passage 111b provided with a relatively high height, and may be provided with one or a plurality thereof as necessary.

The support frame 140 is provided below the carrying body 110 and supports the carrying body 110. The support frame 140 is provided vertically and includes a plurality of vertical rods 141 coupled to the bottom of the carrying-in body 110 and a support plate 142 coupled to the bottom of the vertical rods 141. The support frame 140 is provided to be movable along the installed guide rail 152.

Referring back to FIG. 2, the process processor 200 has an internal space and performs heat treatment of the strip S transferred to the internal space. The processing unit 200 provides a radiant heat to the transported strip S to heat the strip 300 to heat the strip S, and is disposed at the rear of the furnace 300 to cool the heated script S. 400. Hereinafter, each configuration will be described in detail.

4A is a plan view showing the heating furnace of the present invention, FIG. 4B is a front sectional view showing the heating furnace of the present invention, and FIG. 4C is a side sectional view showing the heating furnace of the present invention.

4A to 4C, the heating furnace 300 transfers the loaded strip S in its longitudinal direction and provides radiant heat to heat the strip S. Referring to FIGS. The heating furnace S includes a body 310, a strip conveying part 320, a burner nozzle part 330, and a temperature sensor 350.

The body 310 has an inner space 311 in its longitudinal direction. The inner space 311 is connected to the transfer passage 111 of the strip loading part 100 and the inner space 411 of the first cooling path 410 to be installed later. The body 310 is disposed along its longitudinal direction and is disposed to face the first side wall 310a perpendicular to the ground, the second side wall 310b facing the first side wall 310a, and the first and second side walls 310a and 310b. ) And the third side wall (310c), the third side wall (310c) is placed facing the third side wall (310c) and the strip (S) is carried out, the first side wall (310d), the first to fourth side wall (310a) It is disposed on the upper end of ~ 310d, and includes an upper wall 310e parallel to the ground, and a lower wall 310f disposed to face the upper wall 310e. Inside the first to fourth sidewalls 310a to 310d and the upper and lower walls 310e and 310f, an insulating block 313 which suppresses radiant heat provided by the burner nozzle unit 330 described later from being discharged from the internal space 311. ) Is provided. The inner space 311 is provided with a reducing atmosphere gas in which hydrogen (H ₂ ) and nitrogen (N ₂ ) are mixed at a constant ratio. Openings 312a and 312b through which the strip S is carried in and out are formed at both longitudinal ends of the body 310, respectively.

The strip conveying part 320 is provided in the inner space 311, and moves the strip S carried in the inner space 311 along the longitudinal direction of the body 310. The strip conveying part 320 is disposed spaced apart from each other and includes shafts 321 for supporting the strip (S). The shaft 321 is installed at the same height as the openings 312a and 312b formed at both ends of the body 310 to prevent deflection of the strip S during the transfer. Each of the shafts 321 is disposed to correspond to the upper end of the safety member 340 rearward so that radiant heat provided from the lower nozzle 335 can be sufficiently transmitted to the strip S without being blocked by the shafts 321. do. Each of the shafts 321 is provided to be rotatable about an axis passing through the longitudinal center thereof by the drive of the shaft driver 322.

The burner nozzle unit 330 heats the strip S by providing radiant heat to the strip S to be transferred. The burner nozzle unit 330 includes a plurality of burners 331 and 335 provided in the inner space 311 of the body 310 such that the length thereof is different from the length direction of the body 310. Preferably, each of the burners 331, 335 is provided such that its longitudinal direction is perpendicular to the longitudinal direction of the body 310. Each burner 331, 335 includes a burner body 332 and a radiant tube 333. One end of the burner body 332 is provided with an ignition device 334 for generating a spark to perform ignition of the combustion gas. The radiant tube 333 surrounds the burner body 332 and has a combustion space in which combustion of combustion gas occurs. The radiant tube 333 is provided in the internal space 331, and separates the combustion space from the internal space 311. The radiant tube 333 is made of a ceramic material. The burner body 332 is inserted in the longitudinal direction of the combustion gas supply pipe (not shown) for providing the combustion gas. The combustion gas supplied to the combustion space is combusted by the spark generated in the ignition device 334. Radiant heat generated by combustion of the combustion gas is provided to the strip (S). The burner nozzle unit 330 includes upper burners 331 disposed above the inner space 311 and lower burners 335 provided below the inner space.

The upper burners 331 are spaced apart from each other along the longitudinal direction of the body 310 and are provided on an upper portion of the strip conveying part 320 to provide radiant heat to the upper surface of the strip S. The upper burners 331 pass through the first side wall 310a and are provided to the internal space 311. Each of the upper burners 331 is provided such that an end thereof is adjacent to the second side wall 310b in the interior space 311. Each upper burner 331 is closed at its end.

The lower burners 335 are spaced apart from each other along the longitudinal direction of the body 310 and are provided below the strip transfer part 320 to provide radiant heat to the bottom surface of the strip S. The lower burners 335 pass through the second side wall 310b and are provided to the internal space 311. Each lower burner 335 is provided in the interior space 311 so that its end thereof is adjacent to the first side wall 310a. Each lower burner 335 is closed at its end.

The safety member 340 is provided in the inner space 311 in the shape of a square pillar having a width corresponding to the width of the inner space 311. Specifically, the safety member 340 is disposed between the adjacent lower burners 335, respectively, is installed in a vertical direction from the bottom in the inner space 311. The safety member 340 is provided at its upper end higher than the upper end of the harbor burners 335. Strip S may be pulled out during the transfer process due to foreign matter on the surface. Due to the foreign matter, when the strip S is pulled to one side and the edge portion of the strip S is in contact with the peripheral device, the strip S may be broken. When the strip S breaks in the internal space 311, the broken end sags due to its weight, causing damage to the lower burner 335. In the present invention, since the safety member 340 is disposed between the adjacent lower burners 335, respectively, and the upper end of the safety member 340 is provided higher than the upper end of the lower burners 335, the strip S is being transferred. Even if broken, the broken end is supported by the upper end of the safety member 340 without colliding with the lower burner 335 to prevent breakage of the lower nozzle 335.

The temperature sensor 350 measures the temperature of the radiant heat generated by the burner nozzle unit 330. The temperature sensor 350 passes through the upper wall 310e and is provided to the internal space 311, and the sensor 351 is located in the space between the upper nozzle 331 and the strip S. Temperature sensor 350 may be provided with a plurality of spaced apart from each other along the longitudinal direction of the body (310).

5 is a cross-sectional view showing a cooling treatment unit of the present invention.

Referring to FIG. 5, the cooling treatment unit 400 is disposed behind the heating furnace 300, that is, between the heating furnace 300 and the strip discharging unit 500 and cools the heated strip S. Referring to FIG. The cooling processor 400 includes a first cooling furnace 410 and a second cooling furnace 420. The first cooling furnace 410 is disposed at the rear of the heating furnace 300 and primarily cools the heated strip S. The second cooling path 420 is disposed between the first cooling path 410 and the strip discharge part 500, and secondly cools the first cooled strip S. Inner spaces 411 and 421 connected to each other are formed in the first and second cooling furnaces 410 and 420, respectively, and inner spaces 411 and 421 of the first and second cooling furnaces 410 and 420 are internal spaces 311 of the heating furnace 300. And a transfer passage 511 of the strip discharge part 500. The strip S is heat-treated while being transferred to the inner space 311 of the heating furnace 300 and the inner spaces 411 and 421 of the first and second cooling furnaces 410 and 420. An internal space 411 of the first cooling furnace 410 is provided with a first cooling member 412 capable of cooling the heated strip S to 550 ° C. In the internal space 421 of the second cooling furnace 420, a second cooling member 422 is installed to cool the first cooled strip S to 70 ° C.

FIG. 6A is a cross-sectional view briefly showing the configuration of the strip carry-in portion, and FIG. 6B is a perspective view showing the opening of the strip carry-out portion.

6A and 6B, the strip discharging unit 500 is disposed at the rear of the processing unit 200 and the strip S is transferred so that the strip S transferred from the processing unit 200 is wound around the winding unit (not shown). Export). The strip carry-out part S includes a carrying body 510 having a conveying passage 511 and a supporting frame 540 supporting the carrying body 510.

The carrying body 510 is formed with a transfer passage 511 through which the strip S is transferred in the longitudinal direction, and the transfer passage 511 is connected to the internal space of the process processor 200. According to an embodiment, the conveying passage 511 has a width larger than the width of the strip S to be conveyed, and is provided as a passage having a rectangular cross section. The transfer passage 511 is stepped to vary the height of the transfer passage 511 along the longitudinal direction of the carrying out body 510 for the same reason as the transfer passage 111 of the strip loading part 100. Specifically, the height of the transfer passage 511a at the position where the blocking member 520 is installed is formed lower than the height of the transfer passage 511b at the position where the shaft 512 is installed. Openings 514a and 514b are formed at both ends of the carrying-out body 510, respectively, and the strip S is transferred from the processing unit 200 through the openings 514a formed at one end thereof, and the openings 514b formed at the other end are opened. The strip S is carried out through. A guide roller 513 for guiding and supporting the strip S to be transported is installed outside the opening 514b through which the strip S is carried out. The guide rollers 513 are provided as a pair of rollers facing each other in the up and down direction, and are installed to contact the upper and lower surfaces of the strip S to be carried out, respectively. The transfer passage 511 is provided with a blocking member 520 for blocking the inflow and outflow of gas and external air and a shaft 512 for supporting the strip S to be transferred.

The blocking member 520 is a first blocking member 521 provided to reduce the outflow of gas from the inner space of the processing unit 200, and a second blocking member provided to reduce the inflow of external air into the transport passage 511. 522, and a blocking door 523 blocking the transfer passage 511.

The first blocking member 521 is disposed in the transfer passage 511a close to the opening 514b through which the strip S is carried out, and the gas remaining in the process processor 200 flows out through the transfer passage 511. In this case, the flow of gas is disturbed to reduce the consumption of gas. The first blocking member 521 includes a plate 521 which is provided to be inclined in the direction toward the processing unit 200 toward the inside of the transfer passage 511 from the wall providing the transfer passage 511. Since the first blocking member 521 is provided to be inclined toward the process processor 200, the outflowing gas is moved to the inner wall of the transfer passage along the first blocking member 521 and stays in a space adjacent to the inner wall.

According to an embodiment, the first blocking member 521 includes an upper outflow blocking plate 521a installed at an upper portion of the transport passage 511 and a lower outflow blocking plate 521b installed at a lower portion of the transport passage 511. do. The lower outflow blocking plate 521b is disposed to be symmetrical with the upper outflow blocking plate 521a about a line passing through the longitudinal center of the transport passage 511. Specifically, the upper outflow blocking plate (521a) is provided so that one end is coupled to the upper wall of the transfer passage 511, the other end is adjacent to the upper surface of the strip (S) to be transferred. The lower outflow blocking plate 521b is provided such that one end is coupled to the lower wall of the transfer passage 511 and the other end is adjacent to the lower surface of the strip S.

According to another embodiment, a plurality of first blocking members 521 are provided along the longitudinal direction of the transfer passage 511, and each of the first blocking members 521 is arranged to be parallel to each other. As a result, the gas flowing into the spaced space between the end of the plate 521 and the strip S is hindered by the flow of the plate 521 located at the rear, and the transport passage along the plate 521 located at the rear. It moves to the inner wall of 511. As described above, since the outflow of the gas is interrupted by the first blocking member 521, the outflow amount of the gas is drastically reduced.

According to another embodiment, one end of the first blocking member 521 is provided to be rotatable about a point of contact with the wall of the transfer passage 511. Due to this, the plate 521 may be inclined in the direction toward the processing unit 200 during the process to hinder the outflow of gas, and parallel with the longitudinal direction of the transfer passage 511 while the process is not performed. The plate 521 may be rotated so as to facilitate maintenance of the strip carry-out part 500.

The second blocking member 522 is further spaced apart from the first processing member 521 by the processing unit 200, and thus a transfer passage between the first blocking member 521 and the opening 514b from which the strip S is carried out ( 511). Therefore, the second blocking member 522 is installed in the transfer passage 511 to have a larger interval than the gap between the first blocking member 521 and the process processor 200. The second blocking member 522 includes a plate 522 that is provided to be inclined in a direction further away from the first blocking member 521 toward the inside of the conveying passage 511 in the wall providing the conveying passage 511. Since the second blocking member 522 is provided to be inclined in a direction further away from the first blocking member 521, the introduced external air is moved to the inner wall of the transfer passage 511 along the second blocking member 522, and the inner wall Stay in the space adjacent to it.

According to the embodiment, the second blocking member 522 includes an upper inlet blocking plate 522a that is installed at the upper portion of the conveying passage 511 and a lower inlet blocking plate 522b which is installed at the lower portion of the conveying passage 511. do. The lower inflow blocking plate 522b is disposed to be symmetrical with the upper inflow blocking plate 522a about a line passing through the longitudinal center of the transport passage 511. Specifically, the upper inlet blocking plate 522a is provided so that one end is coupled to the top wall of the transfer passage 511 and the other end is adjacent to the top surface of the strip S to be transferred. The lower inflow blocking plate 522b is provided such that one end is coupled to the lower wall of the transfer passage 511 and the other end is adjacent to the bottom surface of the strip S.

According to another embodiment, a plurality of second blocking members 522 are provided along the longitudinal direction of the transfer passage 511, and each second blocking member 522 is disposed to be parallel to each other. As a result, the gas flowing into the spaced space between the end of the second blocking member 522 and the strip S is blocked by the flow by the second blocking member 522 located at the rear thereof, and the second second member located at the rear thereof. The inner wall of the transfer passage 511 is moved along the blocking member 522. As such, the external air introduced into the transfer passage 511 is disturbed by the second blocking member 522, so the amount of external air introduced is drastically reduced.

 According to another embodiment, the plate of the second blocking member 522 is installed so that one end is in contact with the wall of the transfer passage 511, and the plate 522 is centered on the point of contact with the wall of the transfer passage 511. It is provided to be rotatable. As a result, the plate 522 may be inclined in a direction further away from the first blocking member 521 during the process to reduce the inflow of external air, and the length of the conveying passage 511 during the process does not proceed. The plate 522 may be rotated to be parallel to the direction to facilitate the maintenance of the strip discharge part 500.

The blocking door 523 is disposed between the process processor 200 and the first blocking member 521 and blocks the transfer passage 511. Specifically, the blocking door 523 is installed to be adjacent to an area stepped at different heights on the transport passage 511a having a low height. The blocking door 523 has a rectangular plate shape having a width corresponding to the width of the conveying passage 511 and is disposed perpendicular to the longitudinal direction of the conveying passage 511. The upper end of the blocking door 523 is provided with a link member 525 connecting the blocking door 523 and the blocking door driver 526 in the vertical direction. The link member 525 blocks the transfer passage 511 by driving the blocking door 523 in the vertical direction by the driving of the blocking door driver 526. The blocking door 523 prevents air intrusion from the outside by blocking the transfer passage 511 when it is necessary to temporarily suspend the process due to an emergency stop or other cause. The lower part of the blocking door 523 is made of graphite and graphite felt so that a flaw does not occur on the surface of the strip S even when it is in contact with the strip S.

The shaft 512 supports the strip S to be transferred through the transfer passage 511. The shaft 512 is installed in the width direction of the transfer passage 511 and provided to be rotatable by a driving unit (not shown). The shaft 512 is installed on the transfer passage 511 which is provided with a relatively high height, and may be provided with one or a plurality of shafts as necessary.

The support frame 540 is provided below the carrying body 510 and supports the carrying body 510. The support frame 540 is provided vertically and supports a plurality of vertical rods 541 coupled to the bottom of the carrying out body 510 and a bottom of the vertical rods 541 and a support plate 542 for supporting the vertical rods 541. ). The support frame is provided to be movable along the installed guide rail 552.

Referring to the light annealing method using the light annealing path 10 having the above-described configuration as follows.

Bright annealing method includes a heating process for heating the strip (S) by providing a radiant heat to the strip (S) transferred to the internal space 311 of the heating furnace 300 and a cooling process for cooling the heated strip (S). do.

Referring to a series of processes in which the bright annealing process occurs, first, the strip (S) wound in the unwinding unit (not shown) is carried into the strip loading unit 100 to transfer the heating passage 300 through the transfer passage 111. The heating process is carried out by being transferred to the internal space 311. Referring to FIG. 7, the strip S is heated by receiving radiant heat from the burner nozzle part 330 while passing through the internal space 311 of the heating furnace 300. Radiant heat is directly provided to the strip S by combustion of the combustion gas supplied to the combustion space of the burner nozzles 331 and 335. The strip S is moved directly exposed to the space where the burner nozzles 331 and 335 are provided. As such, since the strip S is directly exposed to the space 311 where the burner nozzles 331 and 335 are provided, the radiant heat generated from the burner nozzles 331 and 335 is transferred directly to the strip S so that the strip S is efficiently Heated to.

The heating process includes providing radiant heat at the top of the strip S. The upper burners 331 are spaced apart from each other on the upper portion of the strip S to be transferred so as to be perpendicular to the longitudinal direction of the inner space. Radiant heat generated in the respective upper burners 331 is provided to the upper surface of the strip (S) to be transferred to heat the strip (S).

The heating process includes providing radiant heat at the bottom of the strip (S). The lower burners 335 are spaced apart from each other at a lower portion of the strip S to be transferred so as to be perpendicular to the longitudinal direction of the inner space. Radiant heat generated in the respective lower burners 335 is provided to the lower surface of the strip S to be transferred to heat the strip S.

The strip S heated in the internal space of the heating furnace 300 is transferred to the cooling treatment unit 400 to perform a cooling process. First, the heated strip S is first cooled while passing through the inner space 411 of the first cooling furnace 410. The heated strip S may be cooled to 550 ° C. in the first cooling furnace 410. The first cooled strip S is second cooled while passing through the inner space of the second cooling furnace 420. The strip S may be cooled to 70 ° C. in the second cooling furnace 420.

After the cooling process is completed, the strip S is transferred to a winding unit (not shown) past the transfer passage 511 of the strip discharging unit 500 and wound up in the winding unit.

The foregoing detailed description illustrates the present invention. In addition, the above-mentioned contents show preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications may be made within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to the disclosures described above, and / or the skill or knowledge in the art. The described embodiments illustrate the best state for implementing the technical idea of the present invention, and various modifications required in the specific application field and use of the present invention are possible. Thus, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. Also, the appended claims should be construed to include other embodiments.

1 is a view showing a heating furnace of a conventional bright annealing furnace.

2 is a cross-sectional view showing a bright annealing furnace according to an embodiment of the present invention.

3A is a cross-sectional view briefly showing the structure of a strip carrying-in part.

Fig. 3B is a perspective view showing the opening of the strip carrying part.

3C is a diagram illustrating a movement path of an atmospheric gas.

3D is a diagram illustrating a movement path of external air.

4A is a plan view of the heating furnace of the present invention.

4B is a front sectional view showing a heating furnace of the present invention.

4C is a side sectional view showing a heating furnace of the present invention.

5 is a cross-sectional view showing a cooling treatment unit of the present invention.

6A is a cross-sectional view briefly showing the configuration of the strip carry-out part.

Fig. 6B is a perspective view showing the opening of the strip carrying out portion.

7 is a view showing a heating step of the present invention.

Claims (19)

Including a furnace for heating the strip to be transported, The furnace A body disposed in the longitudinal direction and having an inner space; A strip conveying part provided in the inner space and moving the strip carried into the inner space along a longitudinal direction of the body; And A burner nozzle portion provided in the inner space, the burner nozzle portion having burners for providing radiant heat to the strip for heating; The burner A burner body for igniting combustion gas; And A radiant tube surrounding the burner body and having a combustion space in which combustion of the combustion gas occurs; The radiant tube is provided in the inner space, the bright annealing furnace, characterized in that for separating the combustion space and the internal space. The method of claim 1, The burner nozzle unit Spaced apart from each other along the longitudinal direction of the body, including the upper burners provided on the upper portion of the strip transfer, The upper burners are bright annealing furnace, characterized in that the longitudinal direction is different from the longitudinal direction of the body. The method of claim 2, The burner nozzle unit Spaced apart from each other along the longitudinal direction of the body, further comprising a lower burner provided in the lower portion of the strip transfer, The lower burners are bright annealing furnace, characterized in that the longitudinal direction is different from the longitudinal direction of the body. The method of claim 1, The burner nozzle unit And a plurality of burners provided in the inner space such that a longitudinal direction thereof is different from a longitudinal direction of the body. The method of claim 4, wherein And each burner has a longitudinal direction perpendicular to a longitudinal direction of the body. The method of claim 3, wherein The body is A first side wall disposed along a conveying direction of the strip; A second side wall disposed to face the first side wall, The upper burners are provided through the first side wall to the inner space, And the lower burners pass through the second side wall to the inner space. The method of claim 6, Each of the upper burners is provided such that an end thereof is adjacent to the second side wall in the inner space. Wherein each of the lower burners is provided such that an end thereof is adjacent to the first side wall in the inner space. The method of claim 7, wherein The upper burner and the lower burner, respectively, characterized in that the ends of the bright annealing furnace. delete The method of claim 1, The radiant tube is a bright annealing furnace, characterized in that having a ceramic material. Including a furnace for heating the strip to be transported, The furnace A body disposed in the longitudinal direction and having an inner space; A strip conveying part provided in the inner space and moving the strip carried into the inner space along a longitudinal direction of the body; And A burner nozzle unit for providing radiant heat to the strip to heat the burner; The burner nozzle unit Spaced apart from each other along the longitudinal direction of the body, further comprising lower burners provided in the lower portion of the strip conveying portion, The furnace And a safety member disposed between the adjacent lower burners, the safety members being installed vertically from a lower portion of the inner space and having an upper end thereof higher than an upper end of the lower burners. The method of claim 11, The strip conveying part is disposed spaced apart from each other, and includes shafts for supporting the strip, And each of the shafts is disposed to correspond to an upper end of the safety member. The method of claim 11, And an temperature sensor provided in the inner space and measuring a temperature of the radiant heat. A heating furnace for heating the conveyed strip; A strip carrying-in portion disposed in front of the heating furnace and carrying the strip into the heating furnace; A strip discharging unit disposed at the rear of the heating furnace and discharging the strip; And A cooling treatment part disposed between the heating furnace and the upper limb strip discharge part and cooling the heated strip; The furnace A body disposed in the longitudinal direction and having an inner space; A strip conveying part provided in the inner space and moving the strip carried into the inner space along a longitudinal direction of the body; And And a burner nozzle unit configured to provide radiant heat to the strip to heat the strip. The method of claim 14, The cooling treatment unit comprises a first cooling furnace for primary cooling the heated strip; And And a second cooling furnace disposed between the first cooling furnace and the strip discharging unit and configured to cool the first cooled strip. The method according to claim 14 or 15, The strip inlet and the strip outlet each form a transport passage connected to the inner space, Each of the transfer passage is provided with a blocking member for blocking the outflow of gas from the inner space, The blocking member is inclined to move the gas along the blocking member to the inner wall of the transfer passage, One end is installed on the inner wall of the transfer passage, the bright annealing furnace, characterized in that the closer to the heating furnace toward the other end. delete delete delete

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