JP2018161656A - Coating device and coating method for brick surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating device and a coating method capable of treating a large quantity of bricks at a time, and further, capable of stably forming a uniform coating layer in an easy way requiring no special skill.SOLUTION: Provided is a coating device 100 comprising: an immersion cage 1; an immersion tank 2; and a plurality of gas blowing ports 31 to 36. The immersion cage 1 is mounted with a plurality of bricks 42. The immersion tank 2 stores a coating liquid 21 for forming a coating layer. The gas blowing ports 31 to 36 feed a gas from the lower side of the plurality of bricks 42 mounted on the immersion cage 1 to the coating liquid 21 present at the lower part of the plurality of bricks 42 mounted on the immersion cage 1 in a state where the immersion cage 1 is immersed into the coating liquid 21 in the immersion tank 2.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a dipping method used for forming a coating layer on a brick surface such as a refractory brick, and can process a large amount of bricks at a time and can easily form a uniform coating layer without requiring special skills. It relates to a dipping method.

  The blast furnace pan is a facility that receives the hot metal released from the bottom of the blast furnace and transports the hot metal to the next process while performing pretreatment for removing impurities. The blast furnace pan has, for example, a shape like a cylindrical pan having a diameter of about 4.5 m and a depth of about 5 m. In a blast furnace pan, refractory bricks are arranged in two or more layers of an inner lining and an outer lining, and the outer periphery of the blast furnace pan is covered with an iron skin.

  The bricks used for the lining of the blast furnace pan have different required characteristics depending on the arrangement site (free board portion, slag line portion, metal line portion, etc.) in the blast furnace pan. Therefore, refractory bricks having characteristics suitable for each arrangement site are selected. For example, a magnesia-carbon brick having excellent corrosion resistance is used in a slag line portion where a slag floating in layers on the hot metal surface is always in contact with the slag line.

  Refractory bricks are repaired every several hundred charges, but the damage rate varies depending on the location of the placement, so repairs are made according to the damage rate. For example, spray repairs are made for minor damage, and bricks are replaced only for local damage. Moreover, when the metal line part with the slowest damage speed reaches the specified remaining thickness, the entire brick is replaced.

  The work of exchanging bricks is to arrange bricks in a circle from the center of the bottom of the blast furnace pan, and the side walls are assembled according to the height of the repair part, and the bricks are exchanged while being stacked. Blast furnace pans are constantly transporting and repairing hot metal, and must be reliably repaired within a limited period of time.

  The magnesia-carbon brick used for the slag line part and the alumina-carbon brick used for the metal line part contain scaly graphite as a main component. The scaly graphite is so slippery that it is used as a solid lubricant, and the carbonaceous brick containing scaly graphite as a main component is also slippery. For this reason, workers need to work carefully in order to work safely, and problems such as a reduction in work efficiency and an increase in labor load have arisen.

  Such a problem can be solved by using a non-carbon brick, but it is difficult to change from a durable side of the brick to a non-carbon brick. In addition, it is conceivable to improve the brick retention by changing the shape of the brick, but the shape of the brick cannot be easily changed, and the problem cannot be solved by the shape factor. Therefore, there has been a demand for reliable measures that enable efficient and safe work within a limited repair period.

  As one of such measures, a technique of coating the surface of the brick with a non-slip is adopted in order to make the brick containing scaly graphite difficult to slip and improve workability and safety. When realizing such a coating, a method of manually coating the brick surface with a brush or roller, a dipping method of dipping the brick into the coating solution, or forming a coating layer on the brick surface by electrostatic painting The method etc. are used (for example, patent document 1 to patent document 3).

  Patent Document 1 uses a resin liquid as a basic component, and is a prescription for coating a brick surface with a coating material containing organic granules (or organic fibers) and carbonates. Application, spraying, and dipping with a brush, roller, spatula, etc. Disclosure. Patent Document 2 discloses a configuration in which a coating material containing various resins and powder pitch or coke powder is coated by electrostatic painting. Patent Document 3 discloses a configuration in which a coating material obtained by mixing a synthetic resin and at least one powder of metal carbonate and metal hydroxide is coated by electrostatic painting. In this configuration, powder is applied and heat-welded to a moderately preheated brick.

JP-A-5-330953 JP-A-5-246787 JP-A-8-060034

  However, each of the above-described hand coating method, electrostatic coating method, and dipping method for forming the coating layer has the following problems.

  That is, in the hand-coating method, uneven coating tends to occur and it is difficult to form a uniform coating layer. Although it may be possible to form a uniform coating layer according to the skill of the worker, it is impossible to perform it by a worker without high skill. Furthermore, it is inefficient because the coating is applied manually to each brick.

  In the electrostatic coating method, a coating material is deposited on the surface of a heated brick by using static electricity and melted to form a coating layer, so that a uniform coating layer can be formed relatively easily. Moreover, work efficiency can be improved by continuously performing from preheating (including drying) of bricks to electrostatic coating. However, since it is necessary to preheat the brick in advance, it is difficult to control the surface temperature of the brick to a temperature suitable for coating when there is only a batch type drying furnace or when there is no preheating equipment. Also, it is not suitable for small lot production.

  In the dipping method, each brick is immersed in a coating solution to form a coating layer, so that a uniform coating layer can be formed relatively easily. However, it is inefficient because each brick is treated individually. Although it is conceivable to immerse a large amount of bricks in the coating solution at one time, when such a method is adopted, for example, it is easy to contain bubbles between the bricks stacked one above the other, causing the bubbles to be uneven. Thus, there is a problem that a uniform coating layer cannot be formed on each brick (a coating layer is not formed in a relatively large area of the brick surface between bricks).

  The present invention has been proposed in view of the above-described conventional circumstances, and can process a large amount of bricks at a time, and can easily and stably form a uniform coating layer without requiring special skills. An object of the present invention is to provide a coating apparatus and a coating method that can be used.

  In order to achieve the above object, the present invention employs the following technical means. First, the present invention is premised on a coating apparatus used for forming a coating layer on a brick surface. And the coating apparatus which concerns on this invention is equipped with an immersion tub, an immersion tank, and a some gas blowing inlet. Immersion fences carry multiple bricks. The immersion tank contains a coating solution for forming a coating layer. The gas blowing port is a coating that exists below the plurality of bricks mounted on the immersion tub from the lower side of the plurality of bricks mounted on the immersion tub in a state where the immersion tub is immersed in the coating liquid in the immersion tank. Supply gas to the liquid.

  In this coating apparatus, it is possible to employ a configuration in which the placement surfaces of the plurality of bricks in the immersion basket are inclined with respect to the horizontal plane in a state where the immersion basket is immersed in the coating liquid in the immersion tank. In this case, a plurality of bricks are stacked on the pallet, and the pallet is inclined at an angle of 5 degrees or more and 20 degrees or less with respect to the horizontal plane in a state where the immersion tub is immersed in the coating liquid in the immersion tank. Can be adopted.

  In the above coating apparatus, the number of gas blowing ports can be 4 or more and 10 or less. Moreover, while being provided in the beam which comprises an immersion soot, the gas blowing inlet can also employ | adopt the structure which injects gas at the angle of 15 degree | times or more and 45 degrees or less toward the downward side with respect to a horizontal surface.

  In another aspect, the present invention can also provide a coating method for forming a coating layer on the surface of each brick by immersing a plurality of bricks in a coating solution. That is, in the coating method according to the present invention, first, bricks are mounted on a dipping basket in a state where a plurality of bricks arranged in a plane are stacked in the vertical direction. Next, a dipping bath is dipped in a dipping tank containing the coating liquid. Subsequently, in a state where the immersion tub is immersed in the coating liquid in the immersion tank, from the lower side of the plurality of bricks mounted on the immersion tub to the coating liquid existing below the plurality of bricks mounted on the immersion tub After the gas is supplied for 10 seconds or more and 60 seconds or less, the immersion tub is left in the immersion tank. Then, the immersion soot is taken out of the immersion tank.

  In this coating method, when the bricks arranged in a plane are mounted on the immersion basket in a state where a plurality of layers are stacked in the vertical direction, the brick is arranged on the pallet and the pallet is mounted on the immersion fence. be able to. Further, it is possible to adopt a configuration in which the interval between adjacent bricks in the arrangement plane is at least 5 mm or more and the interval between adjacent bricks in the vertical direction is 3 mm or more. Furthermore, a configuration in which the standing time is 0.5 minutes or more and 10 minutes or less can be adopted.

  In the above coating method, it is also possible to employ a configuration in which the immersion tub is taken out of the immersion bath, left for one minute or longer after being taken out, and then the solvent contained in the coating solution is removed by drying.

  According to the present invention, a large amount of bricks can be processed at a time, and a uniform coating layer can be easily and stably formed without requiring special skills. As a result, a coating layer can be formed on the brick surface at low cost. The present invention is particularly suitable when an anti-slip coating layer is formed on the surface of a scale-like graphite-containing brick such as magnesia-carbon brick.

The front view which shows an example of the immersion rod of the coating apparatus in one Embodiment of this invention The side view which shows an example of the immersion ridge of the coating apparatus in one Embodiment of this invention The top view which shows an example of the immersion rod of the coating apparatus in one Embodiment of this invention The front view which shows typically an example of the gas supply system of the coating apparatus in one Embodiment of this invention The side view which shows typically an example of the gas supply system of the coating apparatus in one Embodiment of this invention The top view which shows an example of the gas blowing inlet of the coating apparatus in one Embodiment of this invention Sectional drawing which shows an example of the gas blowing inlet of the coating apparatus in one Embodiment of this invention The front view which shows an example of the state which loaded the brick on the pallet mounted in the immersion basket of the coating device in one Embodiment of this invention. The side view which shows an example of the state which loaded the brick on the pallet mounted in the immersion basket of the coating device in one Embodiment of this invention. The front view which shows an example of the state which loaded the brick on the immersion fence of the coating device in one Embodiment of this invention The side view which shows an example of the state which loaded the brick on the immersion basket of the coating device in one Embodiment of this invention The schematic diagram which shows an example of the state which mounts the pallet which loaded the brick on the immersion trough of the coating apparatus in one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. In addition, this invention is not limited to the structure of the following embodiment.

  The coating apparatus according to the present invention includes a dipping tank, a dipping tank, and a gas blowing port. Immersion dredges carry multiple bricks to be coated. The immersion tub contains a coating liquid for forming a coating layer. The gas blowing port is a coating that exists below the plurality of bricks mounted on the immersion tub from the lower side of the plurality of bricks mounted on the immersion tub in a state where the immersion tub is immersed in the coating liquid in the immersion tank. Supply gas to the liquid.

  First, the immersion basket will be described. In the present embodiment, the immersion trough has a configuration in which a pallet loaded with a plurality of bricks is mounted, and the bricks are immersed in the coating liquid together with the pallets. 1-3 is a figure which shows an example of the immersion rod 1 with which the coating apparatus 100 in this embodiment is provided. Here, FIG. 1 is a front view of the immersion rod 1, FIG. 2 is a side view of the immersion rod 1, and FIG. 3 is a top view of the immersion rod 1.

  As shown in FIGS. 1 to 3, the immersion rod 1 includes an upper beam 11 formed in a substantially square shape in plan view, a lower beam 13 formed in a substantially square shape in plan view, and a lower portion from each corner of the lower beam 13. The four columns 12 are provided so as to stand in a direction perpendicular to the plane including the beam 13 and are connected to each corner of the upper beam 11. Although not particularly limited, in the present embodiment, the upper beam 11, the support column 12, and the lower beam 13 are each configured by a square pipe made of a metal such as stainless steel.

  Further, in the present embodiment, the pallet on which the brick is mounted is mounted on the immersion rod 1 in a state in which the brick mounting surface (pallet upper surface) of the pallet is inclined by a predetermined angle with respect to the surface including the lower beam 13. It has become. Therefore, when the immersion rod 1 is immersed in the immersion tank in a state where the lower beam 13 is horizontal, each brick is immersed in the coating solution with the bottom surface of each brick inclined with respect to the horizontal plane.

  Although not particularly limited, in the present embodiment, for fixing the pallet support portion fixedly supported by the back column 12 and the near column 12 above the lower beam 13 positioned on the right side and the left side in a front view. A beam 14 is provided. Here, the pallet support part fixing beam 14 is provided in a state where the height gradually decreases from the back side toward the front side in a front view. The pallet support portion fixing beam 14 can be formed of a metal square pipe.

  A plurality of pallet support portions 15 extending in the left-right direction when viewed from the front are provided on the upper surface (surface on the upper beam 11 side) of the pallet support portion fixing beam 14 at a predetermined interval. Although not particularly limited, in this embodiment, as shown in FIG. 2, the pallet support portion 15 is composed of a rod-shaped body having a V-shaped cross section made of metal, with both ends facing upward with the bent portion facing upward. The parts are respectively fixed to the pallet support part fixing beams 14.

  Next, the gas inlet will be described. As described above, the gas blow-in port has a plurality of pieces mounted on the immersion rod 1 from below the plurality of bricks mounted on the immersion rod 1 in a state where the immersion rod 1 is immersed in the coating liquid in the immersion bath. The gas is supplied to the coating liquid existing below the brick. That is, the gas blowing port supplies gas into the rectangle formed by the lower beam 13 from the lower side of the immersion rod 1. Such a gas blowing port can be provided at an arbitrary position such as the bottom surface of the immersion tank, for example. Although not particularly limited, in this embodiment, a gas blowing port is provided in the lower beam 13. By providing the gas blowing port in the immersion tub 1 in this way, the coating solution can be discharged relatively easily when the coating solution enters the pipe that supplies gas to the gas blowing port.

  4-7 is a figure which shows an example of the gas supply system with which the coating apparatus 100 in this embodiment is provided. Here, FIG. 4 is a front view schematically showing an example of the gas supply system of the coating apparatus according to the present invention, and FIG. 5 is a side view schematically showing an example of the gas supply system of the coating apparatus according to the present invention. is there. FIG. 6 is a top view showing an example of the gas blowing port, and FIG. 7 is a cross-sectional view showing an example of the gas blowing port. 4 and 5, the gas supply system is indicated by a broken line.

  As shown in FIGS. 4 and 5, in the present embodiment, the gas inlet 30 is provided in the central portion of the upper beam 11 on the right side in the front view. The gas inlet 30 includes three gas inlets 31, 32, and 33 provided in the lower beam 13 located on the front side in the front view, and 3 provided in the lower beam 13 located on the back side in the front view. A gas supply pipe for supplying gas to the two gas blowing ports 34, 35, 36 is connected (see FIG. 3). Although not particularly limited, in the present embodiment, four gas supply pipes 51, 52, 53, 54 are connected to the gas inlet 30. Here, the gas supply pipes 51 to 54 are constituted by circular pipes. In the following, for the sake of explanation, expressions on the near side, the back side, the right side, and the left side are used as appropriate with reference to the front view of FIG.

  The gas supply pipe 51 travels from the gas inlet 30 to the front side in the upper beam 11 and then proceeds to the left in the upper beam 11 on the near side. Passes through the inside of the lower beam 13 and reaches the gas blowing port 31 disposed on the left side of the lower beam 13 on the near side. The gas supply pipe 51 connects the gas blowing port 31 and the gas blowing port 32 disposed in the center of the lower beam 13 on the near side. In FIG. 4, the gas inlets 31 to 33 are displayed as T-tubes described later. The gas supply pipe 52 advances from the gas inlet 30 to the front side through the inside of the upper beam 11, passes through the inside of the column 12 on the right front side and the inside of the lower beam 13, and enters the right side of the lower beam 13 on the front side. To the gas inlet 33 arranged in The gas supply pipe 52 connects the gas blowing port 33 and the gas blowing port 32.

  The gas supply pipe 53 travels from the gas introduction port 30 through the interior of the upper beam 11 to the back, and then proceeds to the left through the interior of the upper beam 11 at the back, It passes through the inside of the lower beam 13 on the side and reaches the gas inlet 34 arranged on the left side in the lower beam 13 on the back side. Further, the gas supply pipe 53 connects the gas blowing port 34 and the gas blowing port 35 disposed at the center in the lower beam 13 on the back side. The gas supply pipe 54 advances from the gas inlet 30 through the inside of the upper beam 11 to the back side, passes through the inside of the right-side support column 12 and the inside of the lower beam 13, and passes through the inside of the lower beam 13 at the back side. It reaches the gas inlet 36 arranged on the right side. The gas supply pipe 54 connects the gas blowing port 36 and the gas blowing port 35.

  As shown in FIGS. 6 and 7, each gas inlet 31 to 36 is configured by a T-shaped tube 60. Here, the structure of the gas inlet 32 will be described as an example. The straight portion 61 of the T-shaped tube 60 is connected to each of the gas supply pipes 51 to 54, and the tip of the branch portion 62 arranged toward the rectangle formed by the lower beam 13 constitutes the gas blowing port 32. . Moreover, although it does not specifically limit, the branch part 62 of the T-shaped tube 60 is arrange | positioned with the predetermined | prescribed angle (beta) toward the downward side with respect to the horizontal surface.

  In addition, although illustration is abbreviate | omitted, of course, each gas blowing inlet 31-36 protrudes the outer side of the lower beam 13 (refer FIG. 3). Further, the arrangement of the gas blowing ports 31 to 36 is designed so that the tips of the gas blowing ports 31 to 36 do not protrude downward from the lower surface of the lower beam 13.

  Next, the loading of bricks on the pallet will be described. FIG. 8 is a front view showing an example of a state in which bricks are loaded on a pallet. FIG. 9 is a side view showing an example of a state in which bricks are loaded on a pallet.

  As shown in FIGS. 8 and 9, in the present embodiment, the bricks 42 are stacked on the pallet 41 in a state where a plurality of bricks 42 arranged in a plane at predetermined intervals are stacked in the vertical direction. Here, the bricks 42 adjacent in the vertical direction are also arranged at intervals. In this case, it is preferable to interpose the mesh-like net-like body 43 between the bricks 42. The net-like body 43 is a net-like plate-like body or film-like body having a predetermined thickness. By using such a net 43, the contact area with the brick 42 can be reduced, and the brick surface between the bricks 42 can be coated. Further, since it is possible to suppress the sideways sliding of the bricks 42 placed on the mesh body 43, it is possible to stably stack a plurality of bricks 42 in the vertical direction and to immerse in the coating liquid in the state. Can be implemented.

  Although it does not specifically limit, As such a net-like body 43, an expanded metal, a punching metal, a metal net | network etc. can be used, for example. The material is not limited to metal, and a plastic mesh may be used. As will be described later, if drying is performed after immersion in the coating solution, the mesh 43 needs to be made of a material having heat resistance. Although not particularly limited, in the present embodiment, the net-like body 43 has a size that can cover the entire brick 42 arranged in a planar shape.

  As described above, the pallet 41 loaded with the bricks 42 is mounted on the immersion tub 1, and the coating liquid 21 accommodated in the immersion tank 2 is placed in the coating liquid 21 as shown in the front view of FIG. 10 and the side view of FIG. 11. An immersion rod 1 is immersed. In addition, as shown in FIGS. 1-3, FIG. 10, and FIG. 11, the hanging metal fitting 16 is being fixed to the rectangular four corners which the upper beam 11 comprises in the immersion rod 1. As shown in FIG. By using this hanging metal fitting 16, the immersion rod 1 can be lifted and moved by a crane or the like and carried into the immersion tank 2.

  The structure and size of the immersion tank 2 are not particularly limited as long as the immersion tank 1 on which the brick 42 is mounted is accommodated and can be immersed in the coating liquid 21. However, when the immersion tank 2 is large enough to accommodate the immersion basket 1, problems such as interference between the immersion tank 2 and the immersion basket 1 may occur when the immersion tank 1 is immersed in the coating liquid 21. On the other hand, if the immersion tank 2 is too large compared to the immersion tank 1, it is not economical because it is necessary to use a large amount of the coating liquid 21. Therefore, it is preferable to use the immersion tank 2 having a size capable of providing a gap of about 50 to 150 mm between the immersion tank 2 and the immersion trough 1. The material of the dipping tank is not particularly limited, and for example, a metal container can be used.

  Although not particularly limited, a collision preventing portion 17 protruding in the front-rear direction is provided at the front end and the rear end of the lower beam 13 positioned on the left and right of the immersion rod 1 in a front view. The collision preventing unit 17 has a function of preventing contact between the brick 42 mounted on the dipping basket 1 and the dipping tank 2. For example, even when a long brick mounted on the immersion rod 1 protrudes from the immersion rod 1 or when a brick mounted on the immersion rod 1 protrudes from the immersion rod 1 due to the inclination of the pallet, the brick and the immersion tank 2 The brick can be prevented from being damaged due to contact with the brick.

  Also, the coating liquid 21 having an arbitrary composition can be used. For example, a coating liquid 21 in which particles for preventing slipping are suspended in a solvent can be used. The solvent may be water or an organic solvent. Moreover, the amount of the coating liquid 21 put into the immersion tank 2 can sufficiently immerse the brick 42 mounted on the immersion tub 1, and a depth of about 50 to 150 mm is secured above the immersion tub 1 during the immersion. It is preferable that the liquid amount be as large as possible.

  In the coating apparatus having the above-described configuration, as described above, the immersion tub 1 is immersed from the lower side of the plurality of bricks 42 mounted on the immersion tub 1 in the state in which the immersion tub 1 is immersed in the coating liquid 21 in the immersion tank 2. The gas is supplied from the gas blowing ports 31 to 36 to the coating liquid 21 existing below the plurality of bricks 42 mounted on the basket 1.

  As described above, in the present embodiment, when the immersion rod 1 is immersed in the immersion tank 2 in a state where the lower beam 13 is horizontal, each brick 42 is in a state where the bottom surface of each brick 42 is inclined with respect to the horizontal plane. It will be immersed in the coating liquid 21. By adopting such a configuration, it is possible to cause an asymmetric flow of the coating liquid 21 between the bricks when immersed in the coating liquid 21 and when being pulled up from the coating liquid 21, and It is possible to suppress air bubbles remaining between them. Moreover, since the brick 42 is disposed in an inclined state, it is possible to promote the cutting of the coating liquid on the upper and lower surfaces of the brick after the lifting. In addition, when carrying in / out the pallet 41 which loaded the brick 42 in the immersion rod 1, lift devices, such as a forklift, are used. Therefore, in the immersion rod 1, the angle (inclination angle α) formed by the surface including the lower beam 13 and the pallet support portion fixing beam 14 is preferably 5 to 20 degrees (5 degrees or more and 20 degrees or less). . If the inclination angle α is within the above range, when the pallet 41 is carried into and out of the immersion basket 1, the claw portion of the lift device and the pallet 41 are inserted into the insertion hole for inserting the claw portion of the lift device provided in the pallet 41. There is no interference, and workability and safety in carrying in / out the pallet 41 can be ensured. When the inclination angle α is less than 5 degrees, the above-described bubble residual inhibiting effect and liquid breakage promotion effect are reduced, and when the inclination angle exceeds 20 degrees, the claw portion of the lift device and the pallet 41 interfere with each other. The possibility increases. A more preferable range of the inclination angle α is 10 to 15 degrees (10 degrees or more and 15 degrees or less).

  Further, the gas supplied from the gas blowing ports 31 to 36 becomes bubbles and rises in the coating liquid 21 to generate vertical convection and also generate a horizontal flow. This horizontal flow makes it possible to introduce the coating solution between the upper and lower bricks when the bricks that have been problematic in the conventional dipping method are stacked, and to remove bubbles that tend to remain between the bricks. It is possible to extrude, and a uniform coating layer can be formed on the brick surface. The pallet 41 is a cocoon-like base, and the pallet 41 is appropriately provided with a passage through which the gas supplied from the gas blowing ports 31 to 36 such as holes passes from the back side of the brick mounting surface to the brick mounting surface side. It has been.

  In the present embodiment, a configuration is adopted in which the six gas blowing ports 31 to 36 are arranged in a state where the three gas blowing ports face each other. As long as the vertical convection and the horizontal flow can be generated, the number and arrangement positions of the gas blowing ports are not particularly limited. When the gas blowing ports are arranged to face each other as in the present embodiment, the number of gas blowing ports can be set to 4 to 10, for example. When the number of gas inlets is less than 4 (2: 1 is opposed to each other), the generation of bubbles is localized, and more than 10 (12 or more: 6 or more is opposed) is horizontal. Convection is less likely to occur.

  Moreover, in this embodiment, since the gas blowing inlets 31-36 are arrange | positioned toward the downward side with respect to a horizontal surface, generation | occurrence | production of the above-mentioned convection and stirring of the coating liquid 21 can be performed more efficiently. The angle β directed downward with respect to the horizontal plane is preferably 15 to 45 degrees (more than 15 degrees and less than 45 degrees). When the angle β is smaller than 15 degrees, the ability to stir the coating liquid 21 is lowered. When the angle β exceeds 45 degrees, horizontal convection hardly occurs. A more preferable angle β is 20 to 40 degrees (20 degrees or more and 40 degrees or less).

  In the present embodiment, a configuration is adopted in which two gas supply pipes are connected to the gas blowing ports 31 to 36 in order to blow out the gas more uniformly from the gas blowing ports 31 to 36. However, the number of gas supply pipes connected to each gas inlet 31 to 36 may be one. In the present embodiment, the gas blowing ports 31 to 36 are arranged at the lowermost part of the immersion tub 1, but the gas blowing ports may be arranged in the immersion tank 2. However, it is easier to perform maintenance and fine adjustment of the angle of the gas blowing port if it is arranged on the immersion rod 1. Furthermore, the gas species supplied from the gas blowing ports 31 to 36 are not particularly limited, and any gas can be used. For example, in terms of cost, it is advantageous to use compressed air, but an inert gas such as nitrogen may be used.

  The coating method using the coating apparatus described above will be described below. In the present invention, preliminary treatment including heat treatment is unnecessary.

  First, the bricks 42 are loaded on the pallet 41 as described above, and the pallet 41 is mounted on the immersion basket 1. In this case, the interval between the bricks 42 adjacent in the vertical direction is preferably 3 mm or more. The interval can be adjusted by changing the thickness of the mesh 43, for example. When the distance between the bricks 42 adjacent in the vertical direction is less than 3 mm, the coating liquid 21 remains between the bricks 42 and the above-described horizontal convection hardly occurs. More preferably, the interval between adjacent bricks 42 in the vertical direction is 5 mm or more. The upper limit of the interval between adjacent bricks 42 in the vertical direction is not particularly limited. However, as the interval increases, the number of bricks 42 that can be mounted on the pallet 41 decreases, which makes it less economical.

  In addition, since the coating layer can be formed on the brick surface even if the gap between the adjacent bricks 42 in the arrangement plane is a slight gap, it can be arbitrarily selected according to the shape of the brick 42 or the shape of the pallet 41. is there. However, if the distance is 1 mm or less, the coating liquid 21 tends to remain between the adjacent bricks 42, and if the distance is 2 to 4 mm, horizontal convection due to the above-described gas supply occurs. It becomes difficult. Therefore, the interval between adjacent bricks 42 in the arrangement plane is preferably 5 mm or more, and more preferably 10 mm or more.

  The number of bricks 42 stacked in the vertical direction is arbitrary. However, when the number of stacked layers is small, for example, two steps or less, the number of bricks 42 that can be coated at one time is small, which is not economical. In addition, when the number of stacked layers is large, for example, 5 levels or more, the lowermost brick 42 is pressed by the weight of the upper brick 42, which may cause a quality defect due to chipping or deformation of the brick 42. In this respect, it is more preferable that the number of bricks 42 stacked is, for example, 3 to 4 steps.

  As described above, according to the configuration of the present embodiment, the claw portion 82 of the lift device and the pallet 41 interfere with each other in the insertion hole 45 into which the claw portion 82 of the lift device 81 included in the pallet 41 is inserted. There is no (see FIG. 12). Therefore, workability and safety in carrying in / out the pallet 41 can be ensured.

  The immersion basket 1 on which the brick 42 is mounted is immersed in the immersion tank 2 in which the coating liquid 21 is accommodated. 10 to 12, after the pallet 41 loaded with the bricks 42 is mounted on the immersion rod 1 using a lift device, the immersion rod 1 is hung by a hoist crane or the like in a state where the wire is hooked on the hanging bracket 16. It is lifted and moved above the immersion tank 2. At the position, the immersion rod 1 is lowered and the immersion rod 1 is immersed in the coating liquid 21. In addition, although the hoist crane and the lifting of the immersion rod 1 by the wire are illustrated here, the immersion and the immersion can be performed by any method as long as sufficient strength and safety can be secured for lifting the brick 42 and the immersion rod 1. You may perform the lifting of the kite 1 and the immersion of the immersion kite 1 in the coating liquid 21. For example, a lift method using a hydraulic or electric cylinder may be employed to immerse the immersion rod 1 in the immersion tank 2.

  As described above, in the state where the immersion tub 1 is immersed in the coating liquid 21 in the immersion tank 2, the plurality of bricks mounted on the immersion tub 1 from the lower side of the plurality of bricks 42 mounted on the dip tub 1. The gas is supplied to the coating liquid 21 existing below 42. The gas supply (bubbling) is preferably performed for at least 10 to 60 seconds in a state in which the immersion tub 1 is immersed in the coating liquid 21 in the immersion tank 2. This makes it possible to form a uniform coating layer on the entire brick surface by stirring the coating liquid 21 and horizontal convection. When the bubbling time is less than 10 seconds, stirring of the coating liquid 21 and generation of convection are insufficient. Further, if the bubbling time exceeds 60 seconds, the coating layer is sufficiently formed on the brick surface, so it is not economical to continue the bubbling further.

  In addition, as for the liquid quantity of the coating liquid 21, it is more preferable that the brick uppermost surface is completely immersed in the coating liquid 21 at the time of immersion of the immersion tub 1. However, even when the top surface of the brick is 3 to 4 cm above the liquid level, the coating layer 21 can be formed because the surface of the coating liquid 21 undulates due to bubbling.

  When the bubbling is completed, the immersion tub 1 is left in the immersion tank 2. The standing time is 0.5 to 10 minutes (0.5 minutes or more and 10 minutes or less). If the standing time is less than 0.5 minutes, the coating layer is not sufficiently formed. Further, even if the standing time exceeds 10 minutes, there is no influence on the formation of the coating layer, which is not economical. Thus, by leaving the immersion basket 1 in the immersion tank 2, the coating liquid 21 penetrates slightly into the brick surface layer portion to form a coating layer. At this time, a coating layer is also formed on the brick surface in contact with the mesh 43 because the coating liquid 21 penetrates from the surroundings. If a uniform coating layer is formed on the brick surface that is not in contact with the mesh body 43 (most part of the brick surface), the coating layer is temporarily formed on the brick surface in contact with the mesh body 43. Even if it is not formed, there is no particular problem.

  The thickness of the coating layer is determined by the concentration / viscosity of the coating liquid 21, the number of immersions, and the remaining coating liquid 21 (insufficient liquid breakage). The concentration / viscosity of the coating liquid 21 is made uniform by the above-described bubbling, and thereby the influence on the thickness becomes so small that it can be ignored. Therefore, the coating liquid 21 is formed on the brick surface by sufficiently draining the coating liquid on the brick surface. The thickness of the coating layer can be kept constant.

  After standing, the immersion tub 1 is pulled up from the immersion tank 2 and taken out of the immersion tank 2. It is allowed to stand for at least 1 minute, more preferably for 2 minutes or more until the coating liquid on the brick surface sufficiently flows down.

  Thereafter, drying is performed to remove (evaporate) the solvent of the coating solution as necessary. Although a drying temperature and drying time are not specifically limited, For example, it can be set as the atmospheric temperature of 100-300 degreeC, and the processing time of 1 to 24 hours. In addition, unfired bricks including magnesia-carbon bricks are manufactured after being molded and dried and cured at, for example, an atmosphere temperature of 180 to 230 ° C. and a processing time of 6 to 10 hours. It is also possible to do it simultaneously.

  As described above, according to the coating apparatus, a large amount of bricks can be processed at one time, and a uniform coating layer can be easily and stably formed without requiring special skills. As a result, when a non-slip coating layer is formed on the surface of a scaly graphite-containing brick such as magnesia-carbon brick, the coating layer can be formed on the brick surface at low cost.

  The above-described embodiments do not limit the technical scope of the present invention, and various modifications and applications other than those already described are possible within the scope of the present invention. For example, in the above-described embodiment, the configuration in which the pallet loaded with bricks is mounted on the immersion basket has been described as a particularly preferable form, but the configuration may be such that the bricks are directly mounted on the immersion basket. In addition, as a particularly preferable embodiment, the configuration in which the brick placement surface is inclined with respect to the horizontal plane has been described, but the brick placement surface may be horizontal.

  According to the present invention, a large amount of bricks can be processed at a time, and a uniform coating layer can be easily and stably formed without requiring special skills. It is useful as a coating method.

DESCRIPTION OF SYMBOLS 1 Immersion rod 11 Upper beam 12 Post 13 Lower beam 14 Pallet support part fixing beam 15 Pallet support part 16 Suspension bracket 17 Collision prevention part 2 Immersion tank 21 Coating liquid 31-36 Gas inlet 41 Pallet 42 Brick 43 Net body 100 Coating apparatus

Claims (10)

A coating apparatus used for forming a coating layer on a brick surface,
Immersion dredge with multiple bricks,
A dipping tank containing a coating solution for forming the coating layer;
In the state where the immersion tub is immersed in the coating liquid in the immersion tank, the coating liquid exists below the plurality of bricks mounted on the immersion tub from the lower side of the plurality of bricks mounted on the immersion tub. A plurality of gas inlets for supplying gas to
A device for coating a brick surface.   2. The brick surface according to claim 1, wherein in the state in which the immersion tub is immersed in the coating liquid in the immersion tank, the placement surfaces of the plurality of bricks in the immersion tub are arranged to be inclined with respect to a horizontal plane. Coating equipment.   While the plurality of bricks are stacked on a pallet, the pallet is inclined at an angle of 5 degrees or more and 20 degrees or less with respect to a horizontal plane in a state where the immersion tub is immersed in the coating liquid in the immersion tank. The apparatus for coating a brick surface according to claim 2, which is arranged.   The brick surface coating apparatus according to any one of claims 1 to 3, wherein the number of the gas blowing ports is 4 or more and 10 or less.   5. The gas injection port according to claim 1, wherein the gas blowing port is provided in a beam constituting the immersion tub and injects gas at an angle of 15 degrees or more and 45 degrees or less downward with respect to a horizontal plane. 2. The apparatus for coating a brick surface according to item 1. A coating method for forming a coating layer on the surface of each brick by immersing a plurality of bricks in a coating solution,
A step of mounting a plurality of bricks arranged in a plane on a dipping basin in a stacked state in the vertical direction;
Immersing the immersion tub in an immersion tank containing the coating liquid;
In the state where the immersion tub is immersed in the coating liquid in the immersion tank, the coating liquid exists below the plurality of bricks mounted on the immersion tub from the lower side of the plurality of bricks mounted on the immersion tub. And, after supplying the gas for 10 seconds or more and 60 seconds or less, leaving the immersion tub in the immersion tank;
Removing the immersion trough out of the immersion bath;
A method for coating a brick surface having The step of mounting the bricks arranged in a plane on the immersion pit in a state where multiple layers are stacked in the vertical direction,
Placing bricks on the pallet;
Mounting the pallet on the immersion trough;
The method for coating a brick surface according to claim 6.   The method for coating a brick surface according to claim 6 or 7, wherein an interval between adjacent bricks in the arrangement plane is at least 5 mm or more, and an interval between adjacent bricks in the vertical direction is 3 mm or more.   The method for coating a brick surface according to any one of claims 6 to 8, wherein the standing time is 0.5 minutes or more and 10 minutes or less. After the step of taking out the immersion trough out of the immersion bath,
A step of leaving for more than 1 minute after taking out;
Removing the solvent contained in the coating liquid by drying;
The method for coating a brick surface according to any one of claims 6 to 9, comprising:

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