WO2013100049A1 - Procédé de construction continue de matériau résistant au feu, matériau résistant au feu et dispositif de construction continue - Google Patents

Procédé de construction continue de matériau résistant au feu, matériau résistant au feu et dispositif de construction continue Download PDF

Info

Publication number
WO2013100049A1
WO2013100049A1 PCT/JP2012/083860 JP2012083860W WO2013100049A1 WO 2013100049 A1 WO2013100049 A1 WO 2013100049A1 JP 2012083860 W JP2012083860 W JP 2012083860W WO 2013100049 A1 WO2013100049 A1 WO 2013100049A1
Authority
WO
WIPO (PCT)
Prior art keywords
refractory material
mixture
water
less
continuous
Prior art date
Application number
PCT/JP2012/083860
Other languages
English (en)
Japanese (ja)
Inventor
誠司 花桐
内田　貴之
章弘 新保
誠二 麻生
洋一 古田
伊東　博之
和典 関
淳一 佃
Original Assignee
黒崎播磨株式会社
新日鐵住金株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 黒崎播磨株式会社, 新日鐵住金株式会社 filed Critical 黒崎播磨株式会社
Publication of WO2013100049A1 publication Critical patent/WO2013100049A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining
    • F27D1/1673—Repairing linings by projecting or spraying refractory materials on the lining applied centrifugally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining

Definitions

  • the present invention includes a molten metal container, a molten metal processing apparatus, a lining of a high-temperature atmosphere furnace, or a continuous construction method of a refractory material (unshaped refractory) used as a repair means thereof, a refractory material used in the construction method, and It relates to continuous construction equipment.
  • an amorphous refractory lining a molten metal container or a molten metal processing apparatus is charged with a predetermined amount of a refractory material and water into a batch type mixer (hereinafter referred to as a kneader) and then kneaded for a predetermined time. And the pouring construction and the spraying construction are performed by discharging the kneaded mixture.
  • Dry spraying is a method in which kneaded water is added to dry powder refractory material at the tip of the spray nozzle. For this reason, there is almost no need for post-cleaning such as cleaning of the kneading machine after the completion of the work, and it is suitable for on-site repair work for the fireproof equipment that is operating hot. *
  • the refractory material and water are kneaded in advance, it is possible to reduce the amount of added water compared to the dry spraying method described above. Moreover, since the mixture of the refractory material and water is good, there is little dust during construction, the structure of the construction body is dense, and the durability is superior to the dry spray construction method.
  • wet spray repair construction is mainly limited to cold repair, in which dry spray construction is difficult, that is, repair at a maintenance workshop after the operation of the refractory equipment is finished.
  • the wet spraying method can reduce the moisture content of the additive water compared to the dry spraying method.
  • the wet pumping method uses a concrete pump. In a slurry state. For this reason, a kneaded material needs moderate fluidity
  • the construction body by the wet spray construction method is inferior in its durability when actually constructed on a molten metal container.
  • FIG. 8 is a diagram showing an example of the continuous construction apparatus S in Patent Documents 1 and 2.
  • the powdery refractory material is continuously supplied from the material supply port 11 to the material conveying unit SA by constant cutting.
  • the optimum amount of water corresponding to the supply amount is continuously added from the water injection hole 12 to the material conveyance unit SA.
  • the refractory material and water are mixed for the first time in the material transport unit SA.
  • the description thereof is omitted. *
  • the continuous construction apparatus S is constructed in a form suspended from the upper opening of the molten steel pan T.
  • the refractory material stored in the hopper 231 is conveyed to the approximate center of the base 30A via the screw auger 232.
  • the refractory material is transported downward from the rod-type telescopic transport pipe 36 provided through the central plate 312 of the base 30 ⁇ / b> A, and is temporarily supplied to the intermediate hopper 37 connected to the lower end of the telescopic transport pipe 36. It is collected.
  • the telescopic transport pipe 36 is formed by connecting a plurality of piping members whose pipe diameters gradually increase from the top to the bottom, and the upper end of the telescopic transport pipe 36 is closed by a lid member in which an air vent hole is formed. It is. *
  • the intermediate hopper 37 is provided with a quantitative supply mechanism such as a table feeder at the lower end, and is provided with a supply means such as a screw feeder.
  • the refractory material collected by the intermediate hopper 37 and quantitatively cut out is pushed out by the supply means to the pipe 38 connected to the lower end of the intermediate hopper 37 and is supplied to the material supply port of the continuous construction apparatus S through the pipe 38. It is thrown. That is, in the path from the hopper 231 to the material supply port of the continuous construction apparatus S, the refractory material is conveyed by free fall.
  • the continuous construction apparatus S can be freely rotated, and when the frame body 35 is moved along the horizontal rail member 34, the continuous construction apparatus S can be moved in the horizontal direction. it can. *
  • the material discharge port can be turned and the spraying direction of the refractory can be freely moved.
  • the continuous construction apparatus S shown in FIG. 8 has a configuration in which a refractory material and water are mixed for the first time in the apparatus.
  • the refractory material and water are mixed only in the material transport unit SA, the refractory material and water are transported to the material kneading unit SB without being sufficiently mixed. As a result, the refractory material and water are mixed. There was a possibility that kneading would be insufficient.
  • the hopper 231 increases in size.
  • the size of the hopper 231 is increased, it is difficult to secure a space for installing the hopper 231 in the configuration illustrated in the related art.
  • a structure that can withstand the weight is required. For this reason, when the hopper 231 is enlarged, there is a problem that it is difficult to provide the hopper 231 on the top of the molten steel pan.
  • the hopper 231 is not installed at the top of the molten steel pan, but is installed outside the molten steel pan, and the refractory material is conveyed from the hopper 231 to the continuous construction apparatus by airflow conveyance.
  • the structure to do is known.
  • the refractory material is transported by the airflow, so that there is a problem that the refractory material easily blows through the apparatus and is scattered from the projection port.
  • a refractory material in a fine powder region having a particle size of 75 ⁇ m or less is scattered. Since the material in the fine powder region is plastically deformed and adhered to the refractory material on the surface of the workpiece, the material in the fine powder region greatly contributes to the adhesion of the surface of the workpiece. For this reason, if the fine powder region is scattered and the proportion of the coarse particle region is increased, the probability of adhering to the surface of the workpiece is reduced. That is, there is a problem that the adhesion rate of the construction body is reduced due to scattering of the fine powder region.
  • the fine powder region includes binders and dispersants. For example, if the binder and the dispersing agent are scattered, the functions as the binder and the dispersing agent are impaired, so that the adhesion rate to the workpiece is reduced. *
  • FIG. 9 illustrates an example in which the refractory material is transported by free fall.
  • the configuration illustrated in FIG. Since the mixing is performed only in the material conveying unit SA, it is impossible to ensure the mixing property of the refractory material and water. For this reason, there was a possibility that the refractory material, the binder, the dispersant and the like in the fine powder region would be scattered.
  • An object of the present invention is to prevent a decrease in the adhesion rate due to scattering of the refractory material when the refractory material is conveyed by air flow in the case of performing spraying construction using centrifugal force due to rotation.
  • the continuous construction method of the present invention has a mechanism for continuously supplying a refractory material that is powder and water, and projecting a kneaded product of the refractory material and the water onto a workpiece. It is a continuous construction method of a refractory material including a continuous mixing step, a continuous kneading step, and a continuous projection step using the provided device, wherein the device transports water, and an air flow transport path for air transporting the refractory material.
  • An outer cylinder containing the mixture, and an introduction part for introducing the mixture into an upstream part of the outer cylinder, and the mixture conveyance path is installed from the water injection part to the introduction part, and the outer cylinder Inside is a rotatable time
  • a plurality of protruding members are installed on the outer surface of the rotating unit, and the mixture passes between the inner surface of the outer cylinder and the tip of the protruding member.
  • the continuous mixing step includes a step of pouring the water into the refractory material and mixing, and a step of further mixing the mixture while being conveyed by the mixture conveyance path.
  • the continuous kneading step comprises the step of kneading the mixture to produce the kneaded product by rotating the outer cylinder and the rotating part together, and the continuous projecting step comprises the step of producing the kneaded product. And projecting toward the work piece.
  • the refractory material of the present invention is a refractory material used in the continuous construction method of the present invention, and contains particles having a particle size of less than 75 ⁇ m in an amount of 25% by mass to 60% by mass, and a particle size of less than 75 ⁇ m.
  • the mass ratio of particles less than 10 ⁇ m / particles less than 75 ⁇ m and 10 ⁇ m or more is 0.1 or more and 0.7 or less, or the maximum particle size is 1 mm or more and 10 mm or less.
  • the continuous construction apparatus of the present invention is a continuous construction apparatus for a refractory material that continuously supplies a refractory material that is powder and water, and projects a kneaded product of the refractory material and the water onto a workpiece.
  • the continuous construction apparatus includes an air current conveying path for air conveying the refractory material, a water conveying path for conveying water, and a water injection unit for injecting water conveyed by the water conveying path to the refractory material, A mixture transport path for transporting the mixture of the refractory material and the water, an outer cylinder including the mixture transported by the mixture transport path, and an introduction section for introducing the mixture into an upstream portion of the outer cylinder;
  • the mixture conveyance path is installed from the water injection part to the introduction part, the outer cylinder communicates with the inside, and a rotatable part is provided at the center of the outer cylinder.
  • the outer surface of the rotating part has a plurality of A projecting member is installed, and there is a space for the mixture to pass between the inner surface of the outer cylinder and the tip of the projecting member, and the mixture transport path
  • the mixture is further conveyed, and the outer cylinder and the rotating shaft are rotated together to knead the mixture to produce the kneaded product. It has a function of projecting toward the construction body.
  • water is poured into the refractory material by the water injection section and mixed, and further mixed while transporting the mixture through the mixture transport path.
  • FIG. 1 is a diagram showing an example of a continuous construction apparatus 1 according to the present invention.
  • the continuous construction apparatus 1 is an apparatus for lining an irregular refractory material on the inner surface of a container such as a ladle T. *
  • the continuous construction apparatus 1 includes a transport unit 2, a kneading unit 3, a projection unit 4, an adjustment unit 5, and a main body drive unit 6. *
  • the transport unit 2 includes an air flow transport path 2A, a water transport path 2B, a water injection unit 2C, and a mixture transport path 2D. *
  • the airflow conveyance path 2A is a conveyance path for airflow conveyance of the refractory material from the material tank 2E.
  • 2 A of airflow conveyance paths are mainly comprised by rubber piping, and one part is comprised by metal piping.
  • the carrier gas used by 2 A of airflow conveyance paths does not ask
  • route 2A it demonstrates as what conveys air. *
  • the water conveyance path 2B is a conveyance path for conveying water.
  • the water conveyance path 2B is configured by rubber piping or metal piping. *
  • Water injection unit 2C performs water injection on the conveyed refractory material. Water injection is performed by guiding water conveyed by the water conveyance path 2B from a notch (not shown) provided over the circumferential direction of the airflow conveyance path 2A. In the water injection part 2C, it is sufficient that water can be injected into the refractory material, and the structure thereof is not limited, but a structure that can inject water more uniformly is preferable. An example of a preferable structure will be described in a second embodiment to be described later. *
  • the mixture conveyance path 2D conveys the mixture of the refractory material and water and guides the mixture to the kneading unit 3.
  • the mixture transport path 2D is configured by rubber piping or metal piping.
  • the refractory material injected by the water injection unit 2C is continuously transported by the transport gas that has passed through the air transport path 2A.
  • the kneading unit 3 and the projection unit 4 will be described later. *
  • the adjusting unit 5 includes a hanging drum 5A and a balance weight 5B.
  • the suspension drum 5 ⁇ / b> A is driven up and down in conjunction with the vertical drive of the main body drive unit 6.
  • the air flow path 2A is adjusted so as not to bend. *
  • the balance weight 5B is a weight for fixing the position of the suspension drum 5A. *
  • the main body drive unit 6 includes a vertical drive mechanism 6A, a chain 6B, and a frame 6C.
  • the vertical drive mechanism 6A is a mechanism for driving the main body unit 8 (hereinafter, the kneading unit 3 and the projection unit 4 are referred to as the main body unit 8) up and down.
  • the chain 6B is connected to the vertical drive mechanism 6A and the frame 6C, and the frame 6C is connected to the chain 6B. With this configuration, when the vertical drive mechanism 6A is driven, the main body 8 is driven up and down via the chain 6B and the frame 6C. *
  • the continuous construction apparatus 1 includes a gantry 9 and a material tank 2E is provided on the gantry 9. *
  • the amount of water added to the refractory material is not particularly specified as long as the refractory can maintain the desired durability, but it is more than the conventional dry spray construction method and wet spray construction method.
  • Low water content For example, about 7% by mass to 9% by mass (outside by mass% with respect to the refractory material) can be exemplified.
  • the refractory material is blended into a predetermined particle size by crushing or the like, and then obtained by blending by particle size or type.
  • the refractory material preferably has a top size (maximum particle size) of 10 mm or less in terms of sprayability and construction quality. Further, the lower limit value of the size of the refractory material may be set as appropriate, and is not particularly defined. *
  • the kneading unit 3 includes an outer cylinder 3A, an introduction unit 3B, a rotating shaft 3C, and a protruding member 3D.
  • the upstream part of the kneading part 3 will be described as the upstream kneading part 311A
  • the downstream part of the kneading part 3 will be described as the downstream kneading part 311B.
  • the outer cylinder 3A includes a mixture.
  • the outer cylinder 3A communicates with the inside, and a rotation shaft 3C as a rotatable rotating part is provided at the center of the outer cylinder 3A.
  • the outer cylinder 3A includes an upstream outer cylinder part 31A and a downstream outer cylinder part 31B.
  • the upstream outer cylinder portion 31A is configured in a cylindrical shape, and the downstream outer cylinder portion 31B is configured with a diameter that gradually increases in the downstream direction. Further, the downstream outer cylinder portion 31B is configured to be rotatable by a drive motor (not shown). *
  • the upstream outer cylinder portion 31A may also be configured such that the diameter gradually increases in the downstream direction. That is, the entire outer cylinder 3A may be configured such that the diameter gradually increases in the downstream direction and the entire outer cylinder 3A rotates.
  • the introduction unit 3B introduces the mixture conveyed by the mixture conveyance path 2D into the outer cylinder 3A.
  • the rotating shaft 3C is rotated by a drive motor (not shown), and transmits a rotational force to the projecting member 3D and the inner cylinder 3E.
  • the rotating shaft 3C also functions as a rotating shaft that rotates an impeller 4A (described later). *
  • the rotary shaft 3C is provided with a quick binder transport path 3C1 inside.
  • the quick setting agent transport path 3C1 is a transport path for transporting the quick setting agent.
  • the quick setting agent conveyance path 3C1 communicates with the quick setting agent nozzle 3C2.
  • the quick setting agent nozzle 3C2 is a nozzle for introducing the quick setting agent into the kneaded material. A method of adding the quick setting agent to the kneaded product will be described later. *
  • At least a part of the rotating shaft 3C is configured to cover an inner cylinder 3E as a rotating part.
  • the inner cylinder 3E is configured such that its diameter gradually increases in the downstream direction.
  • the inner cylinder 3E is configured such that its diameter gradually increases in the downstream direction along the shape of the downstream outer cylinder portion 31B.
  • a plurality of protruding members 3D are installed on the outer surface of the rotating shaft 3C and the outer surface of the inner cylinder 3E. *
  • the inner cylinder 3E is covered with the rotary shaft 3C up to the vicinity of the upper end of the outer cylinder 3A.
  • a plurality of protruding members 3D are installed on the outer surface of the inner cylinder 3E.
  • the rotary shaft 3C itself may be configured such that its diameter gradually increases in the downstream direction.
  • a plurality of protruding members 3D are installed on the outer surface of the rotating shaft 3C.
  • a space for allowing the mixture to pass is provided between the inner surface of the outer cylinder 3A and the tip of the protruding member 3D.
  • the tip of the projecting member 3D refers to the tip portion of the projecting member 3D located in the inner surface direction of the outer cylinder 3A.
  • the kneading process of the refractory material and water in the kneading unit 3 will be described.
  • the projecting member in the upstream kneading unit 311A will be described as 3D1
  • the projecting member in the downstream kneading unit 311B will be described as 3D2.
  • the rotating shaft 3C is rotated by a rotating motor (not shown), and the projecting members 3D1 and 3D2 are rotated together with the rotating shaft 3C.
  • the fine particle component of the refractory material is dispersed by the collision with the projecting member 3D1
  • the water is also dispersed by the collision with the projecting member 3D1.
  • the fine particle component of the dispersed refractory material and water collide with each other to further knead to produce a paste-like kneaded product.
  • generated kneaded material is conveyed to the downstream kneading part 311B.
  • the protruding member 3D1 in the upstream kneading part 311A means a rectangular parallelepiped or blade-like shape having a flat surface, and weaker stirring is realized as compared with the protruding member 3D2 in the downstream kneading part 311B. And a paste-like kneaded product can be obtained.
  • the size of the protruding member 3D1 in the upstream kneading portion 311A can be appropriately set by a prior experiment or the like according to the properties of the target refractory material.
  • the kneaded material conveyed to the downstream kneading part 311B adheres to the inner wall surface of the outer cylinder downstream part 31B by centrifugal force, and is further pushed by the projecting member 3D2.
  • the shape of the downstream outer cylinder portion 31B is suitable in that it is easy to knead with almost no stagnation by being a truncated cone shape that expands in the downstream direction.
  • the protruding member 3D2 of the downstream kneading portion 311B means a cylindrical or prismatic one. With this shape, the material adhering to the inner surface of the downstream outer cylinder portion 311B is pushed by the projecting member 3D2 with a strong force, and a kneading force is generated to improve the kneadability. For this reason, compared with 311A of upstream kneading parts, stronger stirring can be implement
  • the size of the protruding member 3D2 in the downstream kneading unit 311B can be appropriately set by a prior experiment or the like according to the properties of the target refractory material.
  • the distance between the protruding member 3D2 and the downstream outer cylinder portion 31B is 3 mm or more and 50 mm or less. This is because if the interval exceeds 50 mm, the mixture cannot be pushed in with a strong force by the rod-shaped member, so that the kneading becomes insufficient. Moreover, it is because a fireproof material becomes easy to bite into the said space
  • the interval between the protruding member 3D2 and the downstream outer cylinder portion 31B is preferably set to a value equal to or larger than the maximum particle diameter of the refractory material.
  • the slurry-like kneaded material that has passed through the kneading section 3 moves to the projection section 4 including the impeller 4A as a projection disk, for example, as shown in FIG. 3, and here, from the quick setting agent nozzle 3C2 as necessary.
  • the quick setting agent is administered, discharged from the projection port 4E by the centrifugal force generated by the rotation of the impeller 4A, and the construction of refractory side walls such as a molten steel pan which is a molten metal container that is operating cold or hot in the steelmaking process.
  • the surface can be continuously sprayed.
  • the projection unit 4 includes an impeller 4A, an endless flat belt 4B, a pulley 4C, a reflection plate 4D, a projection port 4E, and a mounting plate 4F (FIGS. 3 and 4). reference). *
  • the impeller 4A is configured by a cylinder having an opening facing the opening of the outer cylinder 3A.
  • the impeller 4A is rotated by transmitting the rotation of the rotating shaft 3C.
  • the impeller 4A is sandwiched between the bottom plate 4G, the ring-shaped frame 4H arranged at a predetermined interval from the bottom plate 4G, and the bottom plate 4G and the frame 4H. And a plurality of (for example, six) blades 4I provided radially at predetermined intervals along the circumferential direction of the plate, and on the side surface portion where the blades 4I between the bottom plate 4G and the frame 4H are not provided. Has an opening 4J. *
  • the endless flat belt 4B is wound around the impeller 4A and is wound in the opposite directions in a pair of pulleys 4C arranged at the closest interval, and a projection port 4E is formed therebetween.
  • the pulley 4C is rotated by the rotation transmitted from the impeller 4A by the frictional force generated by being wound around the impeller 4A.
  • the reflector 4D is provided in the vicinity of the projection port 4E, and limits the discharge angle to define the projection direction of the kneaded material.
  • the angle of the reflecting plate 4D is an inclination angle of the reflecting plate 4D with respect to a tangent on a contact point (point A in FIG. 3) between the pulley 4C closest to the reflecting plate 4D and the endless flat belt 4B.
  • the arrangement relationship between the opening of the outer cylinder 3A, which is the outlet of the kneading section 3, and the impeller 4A is a configuration in which the downstream end portion of the outer cylinder 3A is accommodated in the impeller 4A. That is, the side wall of the impeller 4A includes the innermost downstream diameter of the outer cylinder 3A. For this reason, the kneaded material is transferred from the opening of the outer cylinder 3A to the side wall of the impeller 4A by centrifugal force, and further, the inner surface of the endless flat belt 4B through the opening 4J which is a gap disposed forward in the rotation direction of the blade plate 4I. It is pressed by the centrifugal force to rotate in synchronization with the moving speed of the endless flat belt 4B.
  • the kneaded material rotated and moved together with the endless flat belt 4B is discharged in the tangential direction of the pulley 4C in the vicinity of the inlet 4E, and the kneaded material scattered away from the endless flat belt 4B collides with the reflecting plate 4D so that the projection direction is changed. It is decided. *
  • the mounting plate 4F pivotally attaches the pulley 4C.
  • the projection direction of a kneaded material can be changed by rotation of a mounting plate 4F (a driving device is not shown).
  • the quick setting agent is injected from the upper inlet (part B in FIG. 2) of the rotating shaft 3C.
  • the quick setting agent is transported via the quick setting agent transport path 3C1 and is guided to the quick setting agent nozzle 3C2.
  • the quick setting agent is ejected from the quick setting agent nozzle 3C2, pressed against the inner surface of the endless flat belt 4B by centrifugal force, and administered to the kneaded material.
  • a quick setting agent can be efficiently inject
  • the quick setting agent can be implemented, for example, by storing the quick setting agent in a tank in advance and transporting the quick setting agent from this tank to a charging port (part B in FIG. 2). *
  • the rapid setting agent may be transported by using the difference in height between the tank and the projection unit 4, but for quantitative addition, it is desirable to transport using a hump, and further, hump and air are used in combination. It is good to do. *
  • the structure of the amorphous refractory used in the continuous construction apparatus according to the present invention is not particularly limited.
  • the amorphous refractory includes a refractory material and a binder, and a dispersant, a curing regulator, and the like may be added as necessary.
  • refractory materials include alumina, silica, alumina-silica, alumina-spinel, alumina-magnesia, alumina-carbon, alumina-silicon carbide, alumina-silicon carbide-carbon, magnesia, Materials composed of carbon, silicon carbide, silicon nitride, zirconia, calcia, dolomite, chrome, chromium-magnesia, magnesia-lime, magnesia-alumina and combinations thereof, such as magnesia-carbon Can be used. *
  • binder for example, alumina cement, hydraulic transition alumina, magnesia cement, phosphate, silicate, or the like can be used. *
  • dispersant examples include, for example, alkali metal phosphates such as sodium tripolyphosphate, sodium hexametaphosphate, and sodium ultrapolyphosphate, polycarboxylates such as sodium polycarboxylate, alkylsulfonates, aromatic sulfonates, One or more selected from polyacrylic acid soda and sulfonic acid soda can be used.
  • alkali metal phosphates such as sodium tripolyphosphate, sodium hexametaphosphate, and sodium ultrapolyphosphate
  • polycarboxylates such as sodium polycarboxylate
  • alkylsulfonates alkylsulfonates
  • aromatic sulfonates aromatic sulfonates
  • polyacrylic acid soda and sulfonic acid soda can be used.
  • the curing modifier includes a curing accelerator and a curing retarder.
  • a curing accelerator for example, one or more selected from slaked lime, calcium chloride, sodium aluminate, lithium carbonate, and the like can be used.
  • the retarder for example, one or more selected from boric acid, citric acid, sodium carbonate, sugar and the like can be used.
  • the quick setting agent for example, one or more powders or liquids selected from calcium salts such as slaked lime and calcium chloride, silicates, aluminates, carbonates, sulfates, and the like can be used.
  • the main body drive unit 6 includes a lifting base 6D.
  • the chain 6B is connected to the lifting base 6D
  • the frame 6C is connected to the lifting base 6D.
  • the continuous construction apparatus 1A is different from the continuous construction apparatus 1 in that the material tank 2E is not installed on the mount 9. *
  • FIGS. 6A and 6B a continuous construction apparatus 1B according to the present embodiment will be described.
  • the configurations other than those shown in FIGS. 6A and 6B are the same as those shown in FIG. 1 or FIG. *
  • the continuous construction apparatus 1 ⁇ / b> B includes a compressed air current conveyance path 211 and atomized water generation means 212.
  • the compressed airflow conveyance path 211 is a conveyance path for conveying a compressed airflow for generating atomized water from water. *
  • the atomized water generating means 212 mixes water and a compressed air stream to generate atomized water.
  • the atomized water refers to water atomized to an average particle size of 100 ⁇ m or less. Moreover, the average particle diameter of atomization water points out the measured value by a laser Doppler method.
  • the atomized water generated by the atomized water generating means 212 is injected into the refractory material by the water injection part 2C1.
  • the atomized water is guided to the uniform chamber 2C2 and injected into the refractory material from the cutout part 2C3 through the uniform chamber 2C2.
  • the arrow in FIG. 6B is an image figure which shows the atomized water ejected from the notch 2C3.
  • the uniform chamber 2C2 is a space for storing atomized water, and is formed in the circumferential direction of the piping. Further, the notch 2C3 is a portion where the piping is notched in order to blow out the atomized water, and is formed in the circumferential direction of the piping. *
  • the refractory material and the atomized water can be easily mixed as compared with the case where only the water is poured into the refractory material, and it is possible to prevent the fine powder from being scattered by the air current conveyance. It can prevent and the adhesion rate of a construction body falling. Moreover, the water content to be added can be reduced, and a dense construction body can be obtained.
  • the mixture transport path 2D includes a main transport path section 213 and a temporary staying section 214. *
  • the main transport path unit 213 is a transport path for transporting the mixture to the introduction unit 3B. *
  • the temporary staying part 214 is a part where the mixture stays temporarily. *
  • the mixture transport path 2D has a bent portion, and therefore, the wear of the transport pipe tends to occur near the bent portion. If the wear is likely to occur, the time to replace the mixture transport path 2D becomes earlier, which requires labor and cost.
  • the mixture temporarily stays in the staying portion 214 when the temporary staying portion 214 is provided. And after a temporary residence, a mixture is conveyed to the introduction part 3B along the main conveyance path
  • the mixture since the mixture is temporarily retained in the temporary retention portion 214, the mixture serves to coat the transport pipe, and wear near the bent portion can be reduced.
  • the projection direction is the horizontal direction (left and right direction in FIG. 1 and FIG. 5), but is not limited to this.
  • the projection direction may be the vertical direction (the vertical direction of the paper in FIGS. 1 and 5).
  • an alumina-magnesia material was used as the refractory material. Further, alumina cement was used as a binder, and sodium silicate was used as a rapid setting agent. *
  • the adhesion rate is actually measured by conducting a spraying experiment for a certain period of time (2 minutes), collecting the loss of material that bounces off the construction surface and falls below the construction surface, measures its mass, and measures the actual material.
  • the amount of adhesion was determined by taking the amount subtracted from the passing amount of as the amount of adhesion.
  • adhesion rate [(actual spray amount) ⁇ (loss amount of material bounced and dropped)] ⁇ (actual spray amount) ⁇ 100. *
  • the adhesion rate is preferably 90% or more. This is because, when the adhesion rate is less than 90%, the apparent porosity of the construction body is remarkably increased as shown in FIG. 7, and it becomes difficult to obtain a dense construction body. Moreover, when the adhesion rate is less than 90%, the loss of the refractory material increases, and the cost is required.
  • the standard for the adhesion rate of 90% or more is not an absolute one, and is only one standard in this embodiment. *
  • Table 1 shows the measurement results of the adhesion rate when the atomized water is poured into the refractory material and when the water is poured into the refractory material.
  • the measurement conditions are as follows: air transport flow rate 4 (m 3 / min), air transport flow rate 20 (m / sec), pipe length 1.5 mm of the mixture transport path 2D, pipe diameter 40 mm of the mixture transport path 2D,
  • the rotational speed of the downstream outer cylinder portion 31B is 150 rpm / min
  • the distance between the protruding member 3D2 and the inner surface of the downstream outer cylinder portion 31B is 10 mm
  • the rotational speed of the rotary shaft 3C is 800 rpm / min
  • the angle of the reflector 4D is 15 degrees
  • the atomized water The average particle size was 11 ⁇ m.
  • the adhesion rate was 90% or more when the atomized water was poured into the refractory material and when the water was poured into the refractory material. However, when the atomized water was poured into the refractory material, the adhesion rate was as high as 97%. This is because atomized water is more sprayed than water, so it is possible to improve the mixability of the refractory material and water to prevent the scattering of fine powder and to prevent the adhesion rate of the construction body from decreasing. Because you can. *
  • Table 2 shows the measurement results of the adhesion rate when the pipe length of the mixture conveyance path 2D is changed. *
  • the measurement conditions are as follows: atomized water with an average particle diameter of 11 ⁇ m is injected, air transport flow rate 4 (m 3 / min), air transport flow rate 20 (m / sec), pipe diameter 40 mm of the mixture transport path 2D, downstream
  • the rotation speed of the outer cylinder portion 31B is 150 rpm / min
  • the interval between the protruding member 3D2 and the inner surface of the downstream outer cylinder portion 31B is 10 mm
  • the rotation speed of the rotation shaft 3C is 800 rpm / min
  • the angle of the reflection plate 4D is 15 degrees.
  • the piping length of the mixture transport path 2D is preferably 0.5 m or more and 3 m or less. This is because if the length is less than 0.5 m, the piping is short, so that it is difficult to sufficiently obtain the mixing effect of the refractory material and the atomized water. Further, if it exceeds 3 m, the piping is long, so that the refractory material accumulates on the inner wall of the mixture conveying path, making it difficult to smoothly convey the material. *
  • Table 3 shows the measurement results of the adhesion rate when the pipe diameter of the mixture transport path 2D is changed. *
  • the measurement conditions were as follows: atomized water having an average particle diameter of 11 ⁇ m was poured, air transport flow rate 4 (m3 / min), air transport flow rate 20 (m / sec), and pipe length 1.5 mm of the mixture transport path 2D.
  • the rotation speed of the downstream outer cylinder portion 31B is 150 rpm / min
  • the interval between the protruding member 3D2 and the inner surface of the downstream outer cylinder portion 31B is 10 mm
  • the rotation speed of the rotary shaft 3C is 800 rpm / min
  • the angle of the reflection plate 4D is 15 degrees. .
  • the pipe diameter of the mixture transport path 2D is preferably 32 mm or more and 50 mm or less. This is because if it is less than 32 mm, the conveying speed of the refractory material increases and the rebound loss tends to increase. Further, if it exceeds 50 mm, the pipe diameter is large, so that the refractory material is deposited on the inner wall of the pipe of the mixture transport path, and smooth material transport becomes difficult.
  • Table 4 shows the measurement results of the adhesion rate when the air conveyance flow rate of air conveyed by the air conveyance path 2A is changed.
  • the measurement conditions are as follows: atomized water with an average particle diameter of 11 ⁇ m is injected, the air conveyance flow rate is 20 (m / sec), the pipe length of the mixture conveyance path 2D is 1.5 mm, the pipe diameter of the mixture conveyance path 2D is 40 mm, The rotation speed of the downstream outer cylinder portion 31B is 150 rpm / min, the interval between the protruding member 3D2 and the inner surface of the downstream outer cylinder portion 31B is 10 mm, the rotation speed of the rotating shaft 3C is 800 rpm / min, and the angle of the reflection plate 4D is 15 degrees.
  • the air conveyance flow rate is preferably 3 (m 3 / min) or more and 6 (m 3 / min) or less. This is because when the air conveyance flow rate is less than 3 (m 3 / min), the refractory material that can be supplied and conveyed is lowered, and thus the refractory material necessary for construction tends to be insufficient.
  • Table 5 shows the measurement results of the adhesion rate when the air conveyance flow velocity of air conveyance by the air conveyance path 2A is changed.
  • the measurement conditions are as follows: atomized water having an average particle diameter of 11 ⁇ m is injected, the air conveyance flow rate is 4 (m 3 / min), the pipe length of the mixture conveyance path 2D is 1.5 mm, and the pipe diameter of the mixture conveyance path 2D is 40 mm.
  • the rotation speed of the downstream outer cylinder portion 31B is 150 rpm / min, the interval between the protruding member 3D2 and the inner surface of the downstream outer cylinder portion 31B is 10 mm, the rotation speed of the rotary shaft 3C is 800 rpm / min, and the angle of the reflection plate 4D is 15 degrees. .
  • the air conveyance flow rate is preferably 10 (m / sec) or more and 30 (m / sec) or less.
  • Table 6 shows the measurement results of the adhesion rate when the rotational speed of the rotating shaft 3C is changed.
  • the measurement conditions are as follows: atomized water with an average particle diameter of 11 ⁇ m is injected, the air conveyance flow rate is 4 (m 3 / min), the air conveyance flow rate is 20 (m / sec), and the pipe length of the mixture conveyance path 2D is 1. 5 mm, the pipe diameter of the mixture transport path 2D 40 mm, the rotational speed 150 (rpm / min) of the downstream outer cylinder part 31B, the distance 10 mm between the projecting member 3D2 and the inner surface of the downstream outer cylinder part 31B, and the angle of the reflector 4D 15 degrees , And.
  • the rotational speed of the rotary shaft 3C is 500 (rpm / min) or more and 1200 (rpm / min) or less.
  • Table 7 shows the measurement results of the adhesion rate when the rotational speed of the downstream outer cylinder portion 31B is changed. *
  • the measurement conditions are as follows: atomized water with an average particle diameter of 11 ⁇ m is injected, the air conveyance flow rate is 4 (m 3 / min), the air conveyance flow rate is 20 (m / sec), and the pipe length of the mixture conveyance path 2D is 1. 5 mm, the pipe diameter of the mixture transport path 2D 40 mm, the interval 10 mm between the protruding member 3D2 and the inner surface of the downstream outer cylinder part 31B, the rotational speed 800 (rpm / min) of the rotating shaft 3C, and the angle of the reflector 4D of 15 degrees, did.
  • the rotational speed of the downstream outer cylinder portion 31B is preferably 50 (rpm / min) or more and 300 (rpm / min) or less. If this is less than 50 (rpm / min), the centrifugal force of the downstream outer cylinder part 31B decreases, it becomes difficult for the kneaded material to adhere to the inner wall surface of the outer cylinder downstream part 31B, and kneading becomes insufficient. Because there is. Moreover, it is because kneading
  • Table 8 shows the measurement results of the adhesion rate when the angle of the reflector 4D is changed.
  • the measurement conditions are as follows: atomized water having an average particle diameter of 11 ⁇ m is generated, the air conveyance flow rate is 4 (m 3 / min), the air conveyance flow rate is 20 (m / sec), and the pipe length of the mixture conveyance path 2D is 1. 5 mm, the pipe diameter of the mixture transport path 2D 40 mm, the rotational speed of the downstream outer cylinder portion 31B is 150 rpm / min, the interval between the protruding member 3D2 and the inner surface of the downstream outer cylinder portion 31B is 10 mm, the rotational speed of the rotary shaft 3C is 800 rpm / min, It was.
  • the reflection angle is preferably -10 degrees or more and 35 degrees or less.
  • the reflection angle exceeds 35 degrees, the amount of the refractory material blocked by the reflection plate 4D increases, and the adhesion rate to the workpiece tends to decrease.
  • the reflection angle is more negative than ⁇ 10 degrees (for example, ⁇ 15 degrees)
  • the projection width of the kneaded material on the workpiece becomes wide.
  • the separation of the fine and coarse components of the refractory material tends to be significant, and as a result, the adhesion rate decreases. More preferably, it is 5 degrees or more and 25 degrees or less.
  • Table 9 shows the measurement results of the adhesion rate when the content of the particle diameter of less than 75 ⁇ m is changed in the refractory material.
  • the content with a particle size of less than 75 ⁇ m is preferably 25% by mass or more and 60% by mass or less.
  • Table 10 shows the measurement results of the adhesion rate when the particle size is less than 10 ⁇ m / less than 75 ⁇ m and 10 ⁇ m or more.
  • the measurement conditions are as follows: atomized water with an average particle diameter of 11 ⁇ m is injected, the air conveyance flow rate is 4 (m 3 / min), the air conveyance flow rate is 20 (m / sec), and the pipe length of the mixture conveyance path 2D is 1. 5 mm, the pipe diameter of the mixture transport path 2D 40 mm, the rotational speed of the downstream outer cylinder portion 31B is 150 rpm / min, the interval between the protruding member 3D2 and the inner surface of the downstream outer cylinder portion 31B is 10 mm, the rotational speed of the rotary shaft 3C is 800 rpm / min, The angle of the reflector 4D was 15 degrees.
  • 40% by mass of particles having a particle diameter of less than 75 ⁇ m was used.
  • the value of the particle size of less than 10 ⁇ m / less than 75 ⁇ m and 10 ⁇ m or more is 0.1 or more and 0.7 or less. This is because if the amount is less than 0.1, the amount of ultrafine powder is small and the plasticity of the refractory material tends to decrease, and the adhesiveness decreases as the plasticity decreases. Moreover, when it exceeds 0.7, since the amount of ultrafine powder is large, kneading may be insufficient, and as a result, the adhesion rate also decreases. *
  • Table 11 shows the measurement results of the adhesion rate when the value of the maximum particle size is changed.
  • the maximum particle size is preferably 1 mm or more and 10 mm or less. This is because if the maximum particle size is smaller than 1 mm, the fine particle component increases, so that the material component having a large specific surface area occupies a large amount, and the kneading of the refractory material and water may be insufficient. This is because the adhesion rate decreases.
  • the material in the fine powder region first adheres to the surface of the workpiece to form the underlayer on the surface of the workpiece, and then the material in the coarse region adheres to the underlayer.
  • the maximum particle size is preferably 10 mm or less.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

La présente invention se rapporte à un procédé de construction grâce auquel il est possible d'empêcher une baisse du taux de fixation due à la dispersion d'un matériau résistant au feu lorsque le matériau résistant au feu est transporté par les courants d'air lorsqu'un revêtement par pulvérisation est réalisé à l'aide de la force centrifuge provoquée par la rotation. Ce procédé de construction est un procédé de construction continue qui utilise un dispositif équipé d'un mécanisme qui permet une alimentation continue en eau et en matériau résistant au feu granulaire, et de projeter une substance malaxée du matériau résistant au feu et de l'eau vers l'objet en cours de construction. Ce procédé comprend : une étape consistant à injecter de l'eau dans un matériau résistant au feu et à les mélanger; une étape consistant à mélanger encore le mélange d'eau et de matériau résistant au feu tout en le transportant au moyen d'une voie de transport de mélange; et une étape consistant à malaxer le mélange afin de produire une substance malaxée au moyen de la rotation d'un tube extérieur et d'un élément rotatif.
PCT/JP2012/083860 2011-12-28 2012-12-27 Procédé de construction continue de matériau résistant au feu, matériau résistant au feu et dispositif de construction continue WO2013100049A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-289167 2011-12-28
JP2011289167A JP2013137167A (ja) 2011-12-28 2011-12-28 耐火材料の連続施工方法、耐火材料、及び連続施工装置

Publications (1)

Publication Number Publication Date
WO2013100049A1 true WO2013100049A1 (fr) 2013-07-04

Family

ID=48697528

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/083860 WO2013100049A1 (fr) 2011-12-28 2012-12-27 Procédé de construction continue de matériau résistant au feu, matériau résistant au feu et dispositif de construction continue

Country Status (3)

Country Link
JP (1) JP2013137167A (fr)
TW (1) TW201335560A (fr)
WO (1) WO2013100049A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6630204B2 (ja) * 2016-03-18 2020-01-15 黒崎播磨株式会社 耐火材料の連続施工装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62162595U (fr) * 1986-04-02 1987-10-15
JP2008241236A (ja) * 2007-02-27 2008-10-09 Nippon Steel Corp 耐火物の連続施工装置
JP2009198167A (ja) * 2008-01-22 2009-09-03 Kurosaki Harima Corp 不定形耐火物の吹付け施工方法
JP2009281697A (ja) * 2008-05-26 2009-12-03 Nippon Steel Corp 耐火物の連続混練装置
JP2011213521A (ja) * 2010-03-31 2011-10-27 Kurosaki Harima Corp キャスタブル耐火物及びその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62162595U (fr) * 1986-04-02 1987-10-15
JP2008241236A (ja) * 2007-02-27 2008-10-09 Nippon Steel Corp 耐火物の連続施工装置
JP2009198167A (ja) * 2008-01-22 2009-09-03 Kurosaki Harima Corp 不定形耐火物の吹付け施工方法
JP2009281697A (ja) * 2008-05-26 2009-12-03 Nippon Steel Corp 耐火物の連続混練装置
JP2011213521A (ja) * 2010-03-31 2011-10-27 Kurosaki Harima Corp キャスタブル耐火物及びその製造方法

Also Published As

Publication number Publication date
TW201335560A (zh) 2013-09-01
JP2013137167A (ja) 2013-07-11

Similar Documents

Publication Publication Date Title
KR100854789B1 (ko) 부정형 내화물의 분무 시공 방법, 거기에 사용하는 분무재료 및 시공 장치
EP0035281A2 (fr) Procédé et appareil pour projeter du mortier ou analogue
CN1199736C (zh) 不定形耐火材料的喷涂施工方法
WO2007066660A1 (fr) Procédé d’application par pulvérisation de réfractaire coulable et matériau de pulvérisation pour utilisation dans ce contexte
JP5865200B2 (ja) 粉体急結剤及び不定形耐火物の吹き付け施工方法
KR100773574B1 (ko) 부정형 내화물의 시공방법 및 그에 사용되는 부정형 내화물
WO2013100049A1 (fr) Procédé de construction continue de matériau résistant au feu, matériau résistant au feu et dispositif de construction continue
JP2007155215A (ja) 不定形耐火物の吹付け施工方法とそれに使用する吹付け材料
JP5366240B2 (ja) 不定形耐火物の吹付け施工方法
JP2006220348A (ja) 不定形耐火材の吹付け施工方法
JP5283849B2 (ja) 耐火物の連続混練方法、耐火物の連続施工方法、耐火物の連続混練装置、及び耐火物の連続施工装置
JP4669362B2 (ja) 不定形耐火物の吹付け施工方法、それに使用する吹付け材料、及び施工装置
JP5243106B2 (ja) 耐火物の連続混練装置
JP5372348B2 (ja) 熱間耐火物吹付装置、及び、熱間における不定形耐火物の吹付施工方法
WO2013147080A1 (fr) Procédé d'application par pulvérisation par transport par courant d'air pour réfractaires non façonnés
JP5255828B2 (ja) 耐火物の連続施工装置
WO2006106879A1 (fr) Procede d’application d’un materiau refractaire moulable par pulverisation
JP5637634B2 (ja) 急結剤及び湿式吹き付け施工方法
JP2011214762A (ja) 不定形耐火物の吹付け施工方法、及び吹付け施工装置
CN217483250U (zh) 一种用于双膛窑悬挂缸耐材检修浇注的工具
WO2019181505A1 (fr) Procédé d'application par pulvérisation de réfractaire monolithique et matériau de pulvérisation utilisé dans celui-ci
JPS596193B2 (ja) 不定形耐火材の吹付けによるライニング方法
JP2002213880A (ja) 不定形耐火物の気流搬送式吹付け施工法
JP2005042532A (ja) 不定形耐火物の吹付施工方法
JP2003254672A (ja) 耐食性に優れた不定形耐火物の吹付け施工方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12863676

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12863676

Country of ref document: EP

Kind code of ref document: A1