EP3031933B1 - Procédé de construction d'un foyer à air chaud - Google Patents

Procédé de construction d'un foyer à air chaud Download PDF

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Publication number
EP3031933B1
EP3031933B1 EP14835034.1A EP14835034A EP3031933B1 EP 3031933 B1 EP3031933 B1 EP 3031933B1 EP 14835034 A EP14835034 A EP 14835034A EP 3031933 B1 EP3031933 B1 EP 3031933B1
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EP
European Patent Office
Prior art keywords
heat
bricks
castable refractory
spacer
insulating
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP14835034.1A
Other languages
German (de)
English (en)
Other versions
EP3031933A1 (fr
EP3031933A4 (fr
Inventor
Akira Shiino
Kazumi Kurayoshi
Norimasa Maekawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Engineering Co Ltd
Original Assignee
Nippon Steel and Sumikin Engineering Co Ltd
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Publication date
Application filed by Nippon Steel and Sumikin Engineering Co Ltd filed Critical Nippon Steel and Sumikin Engineering Co Ltd
Publication of EP3031933A1 publication Critical patent/EP3031933A1/fr
Publication of EP3031933A4 publication Critical patent/EP3031933A4/fr
Application granted granted Critical
Publication of EP3031933B1 publication Critical patent/EP3031933B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F27D1/1626—Making linings by compacting a refractory mass in the space defined by a backing mould or pattern and the furnace wall
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C21B9/06—Linings

Definitions

  • the present invention relates to a method for constructing a hot-blast stove, and more specifically, to a method for constructing a hot-blast stove configured to supply hot air to a blast furnace.
  • a hot-blast stove has been typically used as equipment for supplying hot air to a blast furnace for producing pig iron.
  • a plurality (three to five) of hot-blast stoves are installed to a blast furnace. Some of the hot-blast stoves store heat and the rest of the hot-blast stoves supply hot air to the blast furnace, whereby the hot air can be continuously supplied to the blast furnace.
  • Each of the hot-blast stoves includes: a combustion chamber equipped with a heating burner; and a heat storage chamber filled with checker bricks (i.e., a heat storage medium).
  • a heat storage operation fuel is combusted in the combustion chamber to generate a hot air and the hot air is fed to the heat storage chamber, where heat is stored in the checker bricks stacked in the interior of the heat storage chamber.
  • an air supply operation an outside air passes through the heat storage chamber to be heated, and the hot air heated to about 1200 degrees C to 1400 degrees C is supplied to the blast furnace.
  • hot-blast stove includes: an external combustion type hot-blast stove including the combustion chamber and the heat storage chamber that are constructed as separate furnace bodies; and an internal combustion type hot-blast stove including the combustion chamber and the heat storage chamber that are collectively housed in the same blast furnace body.
  • Fig. 24 illustrates an external combustion type hot-blast stove 1 as an example.
  • the hot-blast stove 1 is of an external combustion type and includes the combustion chamber and the heat storage chamber as separate bodies.
  • the hot-blast stove 1 includes a combustion-chamber furnace body 2 and a heat-storage-chamber furnace body 3 (i.e., two furnace bodies).
  • the illustrated hot-air stove 1 is one of a plurality of hot-air stoves installed to a single blast furnace.
  • a burner 21 is formed on a furnace hearth inside the combustion-chamber furnace body 2.
  • the burner 21 mixes and combusts a fuel gas introduced to a fuel gas introduction unit 22 with an air introduced to an air introduction unit 23, thereby generating a high-temperature combustion gas flowing toward a furnace top of the combustion-chamber furnace body 2.
  • a hot-air supply unit 24 extending to the blast furnace is installed on a side surface of the combustion-chamber furnace body 2.
  • the furnace top portion of the combustion-chamber furnace body 2 is connected to a furnace top portion of the heat-storage-chamber furnace body 3 by a connecting pipe 25.
  • Checker bricks 31 as a heat storage medium are stacked inside the heat-storage-chamber furnace body 3, The checker bricks 31 are stacked without a gap from a furnace hearth to the vicinity of the furnace top in the heat-storage-chamber furnace body 3.
  • the respective checker bricks 31 are formed with a plurality of ventilation holes and are stacked so that the respective ventilation holes communicate with each other. Thus, in the plurality of stacked checker bricks 31, air can flow from the furnace hearth to the furnace top portion of the heat-storage-chamber furnace body 3.
  • an intake-exhaust port 32 is opened to the outside.
  • the burner 21 In a heat storage operation, the burner 21 combusts the fuel gas to generate a combustion gas to go up in the combustion-chamber furnace body 2.
  • the combustion gas is introduced from the connecting pipe 25 into the heat-storage-chamber furnace body 3.
  • the introduced combustion gas is flowed downward through the checker bricks 31.
  • heat of the combustion gas is stored in the checker bricks 31.
  • the combustion gas after passing through the checker bricks 31 is discharged from the intake-exhaust port 32.
  • the outside air is sucked from the intake-exhaust port 32 into the heat-storage-chamber furnace body 3.
  • the sucked outside air is flowed upward through the checker bricks 31.
  • the outside air is heated by the heat stored in the checker bricks 31 to generate a hot air.
  • the hot air is introduced from the connecting pipe 25 into the combustion-chamber furnace body 2 and is supplied from the hot-air supply unit 24 to the blast furnace.
  • each of the combustion-chamber furnace body 2 and the heat-storage-chamber furnace body 3 includes: a cylindrical furnace shell 4 as an outer shell; and a lining 5 formed inside the outer shell and protecting the furnace shell from the high temperature in the furnace.
  • Fig. 25 illustrates the lining 5 of the combustion-chamber furnace body 2.
  • the lining 5 includes: a castable refractory 51 formed on an inner surface of the furnace shell 4; heat-insulating bricks 52 stacked inside the castable refractory 51; and fire bricks 53 stacked inside the heat-insulating bricks 52.
  • An inner side of the fire bricks brick 53 is formed as a cavity. The cavity serves as an air duct in the combustion-chamber furnace body 2.
  • an expansion clearance 54 is formed, for instance, between a layer of the heat-insulating bricks 52 and a layer of the fire bricks 53.
  • the cavity of the expansion clearance 54 is filled with a flexible and amorphous filling material (filler) such as ceramic fiber and foamed plastics.
  • a foamable filling material is injected to the cavity and is foamed to fill every corner. Subsequently, the foamed filling material is solidified and held in the cavity. Even when the foamable filling material is solidified, the solidified foamable filling material is sufficiently soft and does not restrain the thermal expansion of the fire bricks 53 in the same manner as the flexible amorphous filling material.
  • the expansion clearance 54 may be formed between the layer of the heat-insulating bricks 52 and the castable refractory 51, in addition to between the layer of the heat-insulating bricks 52 and the layer of the fire bricks 53.
  • Figs. 27 and 28 illustrate different structures of the lining 5 of the combustion-chamber furnace body 2.
  • the expansion clearance 54 as illustrated in Fig. 25 is not formed between the layer of the heat-insulating bricks 52 and the layer of the fire bricks 53.
  • the expansion clearance 54 is formed in each of gaps formed between the fire bricks 53 arranged in the circumferential direction of the furnace body, in a continuous manner in the radial direction of the furnace body.
  • the expansion clearance 54 allows thermal expansion of the fire bricks 53 and can prevent the fire bricks 53 from being displaced radially outward. Accordingly, when the expansion clearance 54 is employed, the fire bricks 53 and the heat-insulating bricks 52 can be stacked in close contact with each other.
  • the lining 5 of the heat-storage-chamber furnace body 3 is configured in the same manner as the lining 5 of the combustion-chamber furnace body 2 described above.
  • the lining 5 illustrated in Fig. 25 is formed inside the furnace shell 4 and the checker bricks 31 are stacked without a gap inside the innermost side of the fire bricks 53.
  • a scaffolding is set up inside the combustion-chamber furnace body 2 or the heat-storage-chamber furnace body 3, or alternatively, a gondola is suspended and the castable refractory 51 is sprayed to the interior of the furnace shell 4 at a predetermined height of the furnace body. Subsequently, a stacking operation of the heat-insulating bricks 52 and the fire bricks 53 inside the castable refractory 51 is performed (see Patent Literatures 2 and 3).
  • each of the combustion-chamber furnace body 2 and the heat-storage-chamber furnace body 3 is divided into levels by a height (about 1.2 m) within which a worker can easily perform the stacking operation of the heat-insulating bricks 52 and the fire bricks 53.
  • the stacking operation is sequentially repeated at each of the levels.
  • Patent Literature 4 also discloses a stove for use with a blast furnace, particularly an improved insulating structure internally disposed within the stove.
  • Patent Literature 5 discloses a blast-furnace-protective integrated carbonaceous block and a furnace installation method.
  • Patent Literature 6 also discloses a hot-blast stove system of a blast furnace having a plurality of courses of refractory bricks.
  • the scaffolding or the gondola As described above, in the installation of the typical lining 5, since the scaffolding or the gondola is used when the castable refractory 51 is sprayed to the inside of the furnace shell 4, the scaffolding or the gondola needs to be assembled before the castable refractory 51 is sprayed.
  • the scaffolding or the gondola used for spraying the castable refractory 51 interferes with the heat-insulating bricks 52 and the fire bricks 53 to be stacked inside the castable refractory 51, the scaffolding or the gondola needs to be disassembled before the stacking operation.
  • the assembling and disassembling operations of the scaffolding or the gondola are required between the spraying operation of the castable refractory 51 and the stacking operation of the heat-insulating bricks 52 and the fire bricks 53, which entails an increase in a work period and a cost required for the construction of the hot-blast stove 1.
  • An object of the present invention is to provide a method for constructing a hot-blast stove including a furnace body to which a lining is easily built in a short period of time.
  • Our invention provides a method of constructing a hot-blast stove as described in claim 1 as well as some advantageous embodiments as described in dependent claims.
  • the fire bricks may be installed after the heat-insulating bricks are installed from the furnace shell side, or the heat-insulating bricks may be installed after the fire bricks are installed from an inner surface side of the furnace.
  • the order of the installation is not relevant but the castable refractory is injected and solidified after the heat-insulating bricks and the fire bricks are stacked.
  • the castable refractory is not provided by a spraying operation, it is not necessary to assemble and disassemble a scaffolding or a gondola inside the furnace shell, and the lining of the furnace body can be easily built in a short period of time.
  • the heat-insulating bricks receive a load or impact (a force of the castable refractory in a radially inward direction of the furnace body, which is caused by a head pressure of the castable refractory) from the castable refractory.
  • the load or impact can be shared by the heat-insulating bricks and the fire bricks. Accordingly, this arrangement can prevent disadvantages (e.g., shifting or breakage) of the stacked heat-insulating bricks, which is brought, for instance, when only the heat-insulating bricks receive the load from the castable refractory.
  • the lining includes an expansion clearance between the heat-insulating bricks and the fire bricks, between the heat-insulating bricks, or between the fire bricks, and the expansion clearance preferably includes a spacer that is interposed therein, has a predetermined strength at normal temperature, and disappears at an internal temperature of the hot-blast stove at working.
  • the expansion clearance can allow the thermal expansion of the fire bricks when the hot-blast stove is fired. If the expansion clearance is provided by only a freely deformable space or a soft filling material, the load sharing by the heat-insulating bricks and the fire bricks as an essential feature of the invention is not achievable. However, in the above arrangement, since the spacer is interposed in the expansion clearance, the load sharing that is a requisite of the invention is achievable.
  • the spacer has a predetermined strength at normal temperature and the spacer can transmit the load from the heat-insulating bricks to the fire bricks. Accordingly, when the castable refractory is injected between the furnace shell and the heat-insulating bricks, even if the heat-insulating bricks receive the load or impact from the castable refractory, the load or impact can be shared by the heat-insulating bricks and the fire bricks.
  • the castable refractory may be injected after only the heat-insulating bricks are stacked and no fire brick is stacked.
  • a method of providing a support e.g., a bracing plate and a strut
  • a method of keeping a low height of the stacked heat-insulating bricks at each of the stacking is applicable.
  • a method is inefficient and requires a high cost.
  • the expansion clearance can fulfill the desired function and allow the thermal expansion of the fire bricks.
  • a predetermined strength of the spacer according to the above aspect only needs to have a strength greater than the load to be shared during the injection of the castable refractory. It is desirable to suitably design the strength of the spacer depending on the hot-blast stove to which the spacer is applied.
  • the spacer is preferably a thermoplastic resin foam.
  • thermoplastic resin foam for instance, styrene foam often usable as a cushioning material, namely, polystyrene resin (PS) foam is available.
  • foams of other thermoplastic resins may be used.
  • the other thermoplastic resins include a low-density polyethylene resin (LDPE), a high-density polyethylene resin (HDPE), a polyethylene vinyl alcohol resin (EVA), a polypropylene resin (PP), a polyvinyl chloride resin (PVC), a PE/PS blend resin, an acrylic resin (PMMA), and an acrylonitrile butadiene styrene copolymer resin (ABS).
  • the spacer since the spacer is provided by a thermoplastic resin foam, the spacer can obtain the temperature characteristics (i.e., the spacer has strength at normal temperature and is softened and melted with an increase in temperature). In addition, adjustment of the strength and shape-machining of the spacer can be easily made and the spacer can be inexpensively obtained.
  • a spacer obtained by molding the above-described thermoplastic resin foam into a block shape is usable.
  • the thermoplastic resin may be molded into a grid structure or a honeycomb structure.
  • a material of the spacer is not limited to a synthetic resin material having thermoplastic properties, but may be paper (e.g., cardboard).
  • the expansion clearance includes a filler that is soft or amorphous at normal temperature and is interposed therein together with the spacer.
  • the expansion clearance is filled with the filler. Further, when the expansion clearance is reduced with an increase in thermal expansion of the fire bricks, the filler can follow the deforming expansion clearance, so that the filler can fill a gap between the fire bricks while allowing thermal expansion of the fire bricks, thereby preventing hot air from entering the expansion clearance.
  • the filler may be packed in the cavity with no spacer in the expansion clearance, may be packed in a cavity or a recess formed in the spacer, or may be melted at the time of molding when the spacer is provided by a synthetic resin molded article.
  • the method preferably further includes installing a checker brick inside the lining, in which the injecting the castable refractory is performed during or after the installing the checker brick.
  • the castable refractory is injected during the installation of the checker bricks after the installation of the heat-insulating bricks and the fire bricks, the operations can be conducted simultaneously and an entire work period can be shortened.
  • the checker bricks can receive load applied when the castable refractory is injected.
  • the method preferably further includes: dividing the furnace body into a plurality of sections arranged in a height direction; and injecting the castable refractory in each of the sections.
  • the heat-insulating bricks and the fire bricks are to be stacked in every 1.2-meter sections, it is only necessary to determine the sections accordingly.
  • a height of the section for stacking the heat-insulating bricks and the fire bricks is thus equal to a height of a section for injecting the castable refractory
  • the heat-insulating bricks and the fire bricks may be stacked before the castable refractory is injected, or alternatively, the heat-insulating bricks and the fire bricks may be stacked at the same time when the castable refractory is injected.
  • the height of the section for injecting the castable refractory is determined as about 1.2 m
  • fluidity of the castable refractory or whether foreign matters (e.g., tools) is mixed in a castable refractory injection unit can be visually checked from above.
  • the heat-insulating bricks are preferably installed in a plurality of layers in a thickness direction of the lining, and horizontal joints in a circumferential direction of the heat-insulating bricks in the layers are preferably shifted from each other.
  • the castable refractory preferably has a free-flow value in a range from 200 mm to 300 mm.
  • the free-flow value is 200 mm or more, the fluidity of the castable refractory is secured. Even when the castable refractory is injected into the gap between the furnace shell and the heat-insulating bricks, the castable refractory can certainly fill every corners of the gap. Moreover, since the free-flow value is 300 mm or less, it is possible to prevent a poor quality or hose clogging caused by component separation of the castable refractory when the castable refractory is injected.
  • the castable refractory is not provided by a spraying operation, it is not necessary to assemble and disassemble a scaffolding or a gondola inside the furnace shell, and the lining of the furnace body can be easily built in a short period of time.
  • a combustion-chamber furnace body 2 (see Fig. 25 ) of the above-described hot-blast stove 1 (see Fig. 24 ) is built.
  • a unique structure and a construction procedure according to the invention are employed particularly for a lining 5 to be installed in the furnace body (i.e., combustion-chamber furnace body 2).
  • the lining 5 includes: a castable refractory 51 formed on an inner surface of a furnace shell 4; double-layered heat-insulating bricks 52 stacked inside the castable refractory 51; and single-layered fire bricks 53 stacked inside the heat-insulating bricks 52. Further, the lining 5 includes an expansion clearance 54 between a layer of the heat-insulating bricks 52 and a layer of the fire bricks 53.
  • the castable refractory 51, the heat-insulating bricks 52, the fire brick 53 and the expansion clearance 54 have the same structure as the above-described structure of the lining 5 shown in Fig. 24 .
  • an injection procedure of the castable refractory 51 and the structure of the expansion clearance 54 are unique.
  • the castable refractory 51 in the first exemplary embodiment is solidified after being injected into a gap between the heat-insulating bricks 52 and the furnace shell 4 installed in advance. In other words, there is no need to repeat the installation of the scaffolding and the spraying operation at a plurality of heights as required for building an existing castable refractory 51.
  • Basic components of the castable refractory 51 in the exemplary embodiment are similar to those of the existing castable refractory. However, in order to reliably and completely inject the castable refractory between the heat-insulating bricks 52 and the furnace shell 4 without using a vibrator, a free-flow value representing the fluidity is adjusted to 200 mm to 300 mm.
  • the castable refractory 51 While the castable refractory 51 is built, moisture of the castable refractory 51 is absorbed by the heat-insulating bricks built inside the castable refractory 51, so that the fluidity the castable refractory 51 is reduced.
  • a contact surface of the heat-insulating bricks may be subjected to a water-repellent treatment in advance.
  • a treatment increases the cost.
  • the castable refractory 51 can be built without such a pre-treatment, it is effective to adjust the free-flow value to 200 mm to 300 mm.
  • the castable refractory can be built by using a vibrator.
  • the use of the vibrator causes joint breakage and position shift of the heat-insulating bricks due to vibration, it is desirable not to use the vibrator.
  • the castable refractory since the castable refractory is directly built on a surface of the heat-insulating bricks without applying the water-repellent treatment on the surface of the heat-insulating bricks as described above, the castable refractory firmly adheres to the heat-insulating bricks to form no gap therebetween, thereby preventing channeling of hot air in a hot-blast stove enters between the furnace shell and the castable refractory.
  • the expansion clearance 54 includes a spacer 55 and a filler 56 that are interposed in the gap between the heat-insulating bricks 52 and the fire bricks 53 and a load of a head pressure caused by the injection of the castable refractory 51 can be transmitted from the heat-insulating bricks 52 to the fire bricks 53.
  • the spacer 55 is an elongated block that continuously and horizontally extends in the gap between the heat-insulating bricks 52 and the fire bricks 53.
  • the spacer 55 has a rectangular cross-sectional shape. A surface of the spacer 55 near an outer surface of the furnace body is in close contact with an inner surface of the heat-insulating bricks 52 and a surface of the spacer 55 near an inner surface of the furnace body is in close contact with an outer surface of the fire bricks 53. A size of the spacer 55 in a radial direction of the furnace body is set to be equal to a gap dimension between the heat-insulating bricks 52 and the fire bricks 53 in order to ensure the close contact between the heat-insulating bricks 52 and the fire bricks 53.
  • the spacer 55 is exemplified by a block molded by a styrene foam resin.
  • the spacer 55 has hardness, in other words, rigidity at a certain degree or more, among blocks made of a styrene foam resin.
  • Fig. 31 illustrates a relationship between a compressive elasticity modulus and a spacer insertion ratio.
  • the insertion ratio of the styrene foam is defined as 100% when the expansion clearance is completely filled with styrene foam as illustrated in Fig. 12 .
  • the insertion ratio is defined as 10% when a 46-mm styrene foam is placed at every 460 mm in a height direction as illustrated in Fig. 1 .
  • the required compressive elasticity modulus is 80 kg/cm 2 (785 N/cm2) or more.
  • the required compressive elasticity modulus is 50 kg/cm 2 (490 N/cm 2 ) or more.
  • the gap between the heat-insulating bricks 52 and the fire bricks 53, in which the spacer 55 is disposed is curved in a circular arc shape in the horizontal direction.
  • the spacer 55 in an original state may be difficult to treat (for instance, the spacer is temporarily fixed to the inner surface of the heat-insulating bricks 52). Accordingly, in the exemplary embodiment, it is preferable to perform, for instance, the following treatment in order to cope with the circular arc shape.
  • a spacer obtained by laminating a plurality of thin plates 55A molded from a styrene foam resin is used.
  • the thin plates 55A curved in advance are laminated into a single body.
  • the single body can provide the spacer 55 curved in a circular arc shape in advance.
  • a styrene foam resin is molded into a linearly extending base material 55B having a rectangular cross-sectional shape.
  • a plurality of notches 55C having a predetermined width is formed on a surface of the base material 55B.
  • the base material 55B is used as the spacer 55, the base material 55B is curved with the notches 55C facing inward, so that the base material 55B is easily bendable by a cut amount of the cut notches 55C. It should be noted that the base material 55B is bendable with the notches 55C facing outward.
  • a plurality of small pieces 55D having a planar shape of an isosceles trapezoid are formed by molding the same base material 55B as shown in Fig. 18 and cutting the base material 55B in a cutting plane inclined to a longitudinal direction.
  • a circular arc-shaped spacer 55 as a whole can be obtained by arranging the small pieces 55D so that a lower base of the isosceles trapezoid is on the outer side and an upper base thereof is on the inner side.
  • the above-described spacers 55 are intermittently arranged at a plurality of heights.
  • a cavity remains between the vertically adjacent spacers 55.
  • the cavity between the spacers 55 is filled with the filler 56.
  • the filler 56 is a heat-resistant ceramic fiber or the like. A shape and a thickness of the filler 56 are optionally deformable by an external force.
  • the filler 56 may be set in an amount enough to fill a gap to be left between the heat-insulating bricks 52 and the fire bricks 53 after the hot-blast stove is operated and the fire bricks 53 are thermally expanded.
  • a ratio of an area where the spacer 55 is in close contact with the surface of the heat-insulating bricks 52 or the fire bricks 53 is, for instance, 10% to 50%.
  • the required amount of the spacer 55 is reducible and the material cost is reducible by decreasing the ratio.
  • the load transmitted from the heat-insulating bricks 52 to the fire bricks 53 is concentrated on a narrow area, it is necessary to increase the rigidity of the material of the spacer 55.
  • the expansion clearance 54 is completely filled with the spacer 55, so that the ratio may be 100% (see a fourth exemplary embodiment described later) or 50% to 99% in an intermediate between the above-described ratios.
  • a building procedure of the lining 5 in the first exemplary embodiment is as follows.
  • the heat-insulating bricks 52 in a first layer are built at a predetermined interval inside the furnace shell 4 of the combustion-chamber furnace body 2.
  • the heat-insulating bricks 52 in a second layer are built inside the heat-insulating bricks 52 in the first layer in close contact with each other. At this time, joints of the heat-insulating bricks 52 in the second layer are shifted in the height direction with respect to the horizontal joints of heat-insulating bricks 52 in the first layer.
  • a bonding mortar or the like is applied between the heat-insulating bricks 52 in each of the first and second layers and between the heat-insulating bricks 52 in the first layer and the heat-insulating bricks 52 in the second layer, so that the heat-insulating bricks 52 are fixed to each other.
  • the spacer 55 extending in the horizontal direction is installed at a predetermined height position of the inner surface of the heat-insulating bricks 52 in the second layer.
  • the spacer 55 is temporarily fixed to the inner surface of the heat-insulating bricks 52, using a double-sided adhesive tape or the like.
  • the filler 56 fills a gap between the vertically adjacent spacers 55.
  • the filler 56 packed in a bag or the like may be installed. It is desirable to temporarily fix the filler 56 to the upper spacer 55 or the inner surface of the heat-insulating brick 52 with a double-sided adhesive tape or the like.
  • the fire bricks 53 are built inside the spacer 55 in close contact with each other.
  • the spacer 55 is interposed between the heat-insulating bricks 52 and the fire bricks 53 so that the spacer 55 is brought into close contact with the heat-insulating brick 52 and the fire brick 53 when a compressive force is applied.
  • the castable refractory 51 is injected to the gap between the inner surface of the furnace shell 4 and the outer surface of the heat-insulating bricks 52 in the first layer, and the castable refractory is solidified.
  • the castable refractory 51 may be injected in a manner to flow down the castable refractory 51 from above.
  • the castable refractory may be gradually injected from the bottom using an injection pipe 41 penetrating the furnace shell 4.
  • the lining 5 including the castable refractory 51, the heat-insulating bricks 52, the fire bricks 53 and the expansion clearance 54 is formed.
  • the spacer 55 is melted by an internal heat of the furnace and disappears from the expansion clearance 54, and the filler 56 fills the expansion clearance 54 narrowed by the expansion of the fire bricks.
  • the castable refractory is not provided by a spraying operation, it is possible to omit a complicated work in which a scaffolding or a gondola is installed inside the furnace shell 4 to spray the castable refractory 51 and is disassembled before the installation of the heat-insulating bricks 52.
  • the lining 5 of the furnace body can be easily built in a short period of time.
  • the lining 5 includes the expansion clearance 54 between the heat-insulating bricks 52 and the fire bricks 53.
  • the spacers 55 having a predetermined strength at normal temperature and disappears at the internal furnace temperature in the working hot-blast stove are interposed.
  • the spacer 55 is interposed between the heat-insulating bricks 52 and the fire bricks 53 and can transmit the load (the force of the castable refractory in a radially inward direction of the furnace body, which is caused by a head pressure of the castable refractory 51) applied to the heat-insulating bricks 52 at the time of injection of the castable refractory 51 to the fire bricks 53.
  • the heat-insulating bricks 52 receive the load or impact (the force in the radially inward direction of the furnace body) caused by the head pressure from the castable refractory 51.
  • the load or impact can be transmitted from the heat-insulating bricks 52 to the fire bricks 53 via the spacer 55 installed in the expansion clearance 54. Accordingly, a sufficiently large mass of from the heat-insulating bricks 52 to the fire bricks 53 can reliably share the load.
  • the spacer 55 for instance, is made of a styrene foam resin, when the hot-blast stove is fired to work, the spacer 55 disappears by the internal heat of the furnace and can allow the thermal expansion (the radially outward displacement of the furnace body) of the fire bricks 53.
  • the spacer 55 is melted with an increase in the furnace temperature and disappears from the expansion clearance 54. Accordingly, the expansion clearance 54 can fulfill the intended function and can allow the thermal expansion of the fire bricks 53.
  • the spacer 55 since the spacer 55 is provided by a polystyrene resin foam (e.g., styrene foam), the spacer 55 can obtain the temperature characteristics (i.e., the spacer 55 has strength at normal temperature and is softened and melted with an increase in temperature). In addition, adjustment of the strength and shape-machining of the spacer 55 can be easily made and the spacer 55 can be inexpensively obtained.
  • a polystyrene resin foam e.g., styrene foam
  • the filler 56 that is soft or amorphous at normal temperature is interposed in the expansion clearance 54. Accordingly, after the spacer 55 disappears from the expansion clearance 54, the filler 56 fills the expansion clearance 54. Further, when the expansion clearance 54 is reduced with an increase in thermal expansion of the fire bricks 53, the filler 56 can follow the deforming expansion clearance 54, so that the filler 56 can fill a gap between the fire bricks 53 while allowing thermal expansion of the fire bricks 53, thereby preventing hot air from entering the expansion clearance 54.
  • the filler 56 can reliably follow the thermal expansion of the fire bricks 53 and a deterioration of the filler 56 due to heat generated in the working furnace can be minimized.
  • the castable refractory 51 is injected after the heat-insulating bricks 52, the spacer 55 and the filler 56 of the expansion clearance 54, and the fire bricks 53 are installed.
  • the castable refractory 51 may be injected in each of levels with a predetermined height or may be simultaneously injected in plural ones of levels with the predetermined height.
  • the level with the predetermined height is a height of about 1.2 m that is suitable for a worker to build the heat-insulating bricks 52, the spacer 55 and the filler 56 of the expansion clearance 54, and the fire bricks 53.
  • Fig. 8 illustrates the procedure for injecting the castable refractory 51 in each of levels.
  • a plurality of levels are set in the combustion-chamber furnace body 2.
  • the lining 5 is built inside the furnace shell 4 in the order denoted by reference numerals 1 to 15.
  • the heat-insulating bricks 52 are installed in two layers (reference numeral 1 and reference numeral 2) inside the furnace shell 4 at a predetermined interval, the expansion clearance 54 (the spacer 55 and the filler 56) is installed inside the heat-insulating bricks 52 (reference numeral 3), and the fire bricks 53 are installed inside the expansion clearance 54 (reference numeral 4).
  • the castable refractory 51 is injected between the furnace shell 4 and the heat-insulating bricks 52 (reference numeral 5).
  • a 1.2-m framework scaffolding (a single pipe assembly or a 1.2-m activity scaffold) is temporarily installed.
  • the heat-insulating bricks 52 (reference numeral 11 and reference numeral 12), the expansion clearance 54 (reference numeral 13) and the fire bricks 53 (reference numeral 14) are installed, and the castable refractory 51 is injected (reference numeral 15).
  • the castable refractory 51 may be injected from above by a working standing on an upper surface of the heat-insulating bricks 52 at each of the levels, or alternatively, may be injected through the injection pipe 41 penetrating the furnace shell 4 provided at a lower portion of each of the levels C1 to C3.
  • the height of the section for injecting the castable refractory 51 can be reduced with such an injection in each of the level, the fluidity of the castable refractory or whether foreign matters (e.g., tools) is mixed in the castable refractory injection unit can be visually checked by the worker, so that the castable refractory 51 can be reliably fed.
  • foreign matters e.g., tools
  • Fig. 9 illustrates the procedure for simultaneously injecting the castable refractory 51 in plural ones of levels.
  • a plurality of levels are set in the combustion-chamber furnace body 2.
  • the lining 5 is built inside the furnace shell 4 in the order illustrated by the reference numerals 1 to 17.
  • the heat-insulating bricks 52 are installed in two layers (reference numeral 1 and reference numeral 2) inside the furnace shell 4 at a predetermined interval, the expansion clearance 54 (the spacer 55 and the filler 56) is installed inside the heat-insulating bricks 52(reference numeral 3), and the fire bricks 53 are installed inside expansion clearance 54 (reference numeral 4).
  • a framework scaffolding (a 1.2-m single tube assembly or a 1.2-m activity scaffold) is temporarily installed.
  • the castable refractory 51 is simultaneously injected to the two levels of the level C1 and the level C2 between the furnace shell 4 and the heat-insulating bricks 52 (reference numeral 9). After that, the framework scaffolding is similarly temporarily installed.
  • the heat-insulating bricks 52 (reference numeral 10 and reference numeral 11), the expansion clearance 54 (reference numeral 12) and the fire bricks 53 (reference numeral 13) are installed.
  • the framework scaffolding is similarly temporarily installed.
  • the heat-insulating bricks 52 (reference numeral 14 and reference numeral 15), the expansion clearance 54 (reference numeral 16) and the fire bricks 53 (reference numeral 17) are installed.
  • the castable refractory 51 is simultaneously injected to the two levels of the level C3 and the level C4 between the furnace shell 4 and the heat-insulating bricks 52 (reference numeral 18).
  • the castable refractory 51 may be injected to the levels C1, C2 and the levels C3 and C4 from above by the worker standing on the upper surface of the heat-insulating bricks 52 in each of the upper level C2 and C4, or alternatively, may be injected through the injection pipe 41 penetrating the furnace shell 4 provided at the lower portion of the lower levels C1 and C3.
  • the castable refractory 51 can be simultaneously injected to the plurality of levels with the above injection for the levels, the number of the injection operations of the castable refractory 51 can be reduce to improve a working efficiency.
  • the spacers 55 are intermittently installed at each predetermined height in the expansion clearance 54 and the filler 56 fills a space between spacers 55.
  • a volume of the spacer 55 may be expanded and a recess or the like is formed on a surface the spacer 55 to house the filler 56 therein.
  • the spacer 55 has a rectangular parallelepiped main body including recesses 55E formed on a surface thereof and the filler 56 filling the recesses 55E.
  • the working steps can be simplified to improve the efficiency.
  • the spacer 55 has a main body having an E-shaped cross-section and continuously extending in a longitudinal direction.
  • the filler 56 fills a recessed groove 55F continuously formed on a surface. Even by using such a spacer 55, since the installation of the filler 56 is simultaneously performed in the installation operation of the spacer 55, the working steps can be simplified to improve the efficiency.
  • the spacer 55 configured to house the fillers 56
  • the spacer 55 is not limited to the spacer 55 including the recess 55E or the recessed groove 55F formed on the block-shaped main body, but the spacer 55 may include the main body formed in a shape other than the block.
  • the main body of the spacer 55 is shaped in a grid in which shaft materials 55G made of a thermoplastic resin having a predetermined rigidity are mutually crossed, and the fillers 56 are held in an internal space of the grid.
  • the main body of the spacer 55 is shaped in a honeycomb structural body 55H made of a thermoplastic resin having a predetermined rigidity, and the fillers 56 are held in an internal space of the honeycomb structural body 55H.
  • the shaft material 55G or the honeycomb structural body 55H is softened or melted by the internal heat of the furnace, thereby allowing the thermal expansion of the fire bricks 53.
  • the filler 56 held in the grid of the shaft material 55G or the honeycomb structural body 55H remains as the expansion clearance 54, so that the same advantages as those by the expansion clearance 54 (the intermittently disposed spacer 55 and filler 56) of the first exemplary embodiment can be obtained.
  • the heat-storage-chamber furnace body 3 (see Fig. 10 ) that constitutes the above-described hot-blast stove 1 (see Fig. 24 ) is constructed.
  • the heat-storage-chamber furnace body 3 has the same structure as that of the combustion-chamber furnace body 2 (see Fig. 1 ) described in the first exemplary embodiment and includes the checker bricks 31 stacked inside the heat-storage-chamber furnace body 3. Accordingly, the description on the same structure as that of the combustion-chamber furnace body 2 described above will be omitted.
  • the same advantages as the above-described advantages in the first exemplary embodiment can be also obtained in the heat-storage-chamber furnace body 3.
  • a differently structured combustion-chamber furnace body 2 (see Figs. 11 and 12 ) that constitutes the above-described hot-blast stove 1 (see Fig. 24 ) is constructed.
  • a unique structure and a construction procedure according to the invention are employed particularly for the lining 5 to be installed in the furnace body (i.e., the combustion-chamber furnace body 2).
  • the lining 5 includes: the castable refractory 51 formed on the inner surface of a furnace shell 4; the heat-insulating bricks 52 stacked inside the castable refractory 51; and the fire bricks 53 stacked inside the heat-insulating bricks 52. Further, the lining 5 includes the expansion clearance 54 continuously extending in the radial direction and provided between the fire bricks 53 arranged in the circumferential direction of the furnace body.
  • the castable refractory 51, the heat-insulating bricks 52, the fire bricks 53 and the expansion clearance 54 have the same structure as the above-described structure of the lining 5 shown in Figs. 27 and 28 .
  • the injection procedure of the castable refractory 51 and the structure of the expansion clearance 54 are unique.
  • the castable refractory 51 is solidified after being injected into the gap between the heat-insulating bricks 52 and the furnace shell 4 installed in advance, in the same manner as in the first exemplary embodiment. For this reason, the free-flow value of the castable refractory 51 is adjusted to 200 mm to 300 mm.
  • the expansion clearance 54 includes the spacer 55 and the filler 56 interposed in the gap between the heat-insulating bricks 52 and the fire bricks 53.
  • the spacer 55 is a rod-shaped block having a rectangular cross-section that is molded from the same hard styrene foam as in the first exemplary embodiment.
  • the spacer 55 is installed in the gap between the fire bricks 53 along the horizontal and radial directions.
  • the spacer 55 is installed while being pressed by the fire bricks 53 on both sides of the spacer 55. Accordingly, both the sides of the spacer 55 are respectively in close contact with surfaces of the fire bricks 53.
  • the above-described spacers 55 are intermittently arranged at a plurality of heights.
  • a cavity remains between the vertically adjacent spacers 55.
  • the cavity between the spacers 55 is filled with the filler 56.
  • the filler 56 is a heat-resistant ceramic fiber or the like. A shape and a thickness of the filler 56 are optionally deformable by an external force.
  • the filler 56 may be set in an amount enough to fill a gap to be left between the heat-insulating bricks 52 and the fire bricks 53 after the hot-blast stove is operated and the fire bricks 53 are thermally expanded.
  • the building procedure of the lining 5 in the third exemplary embodiment is as follows.
  • the heat-insulating bricks 52 in two layers are built inside the furnace shell 4 at a predetermined interval from the furnace shell 4 and the fire bricks 53 are installed inside the heat-insulating bricks 52.
  • the expansion clearance 54 (the spacer 55 and the filler 56) is installed on a side surface of the fire brick 53 and another fire brick 53 is stacked adjacently on the expansion clearance 54 such that the fire bricks 53 interpose the expansion clearance 54.
  • the castable refractory 51 is injected in the gap between the furnace shell 4 and the heat-insulating bricks 52.
  • the castable refractory 51 is injected in the same manner as in the first exemplary embodiment.
  • a combustion-chamber furnace body has substantially the same structure as that in the first exemplary embodiment, but includes the expansion clearance 54 having a different structure.
  • the combustion-chamber furnace body 2 in the fourth exemplary embodiment includes the lining 5 provided inside the furnace shell 4, in which the lining 5 includes the castable refractory 51, the heat-insulating bricks 52, the fire bricks 53 and the expansion clearance 54.
  • the expansion clearance 54 of the first exemplary embodiment includes the spacers 55 arranged at predetermined intervals and the filler 56 fed therebetween as illustrated in Fig. 1 .
  • a spacer 57 is provided in an entirety of the expansion clearance 54 as illustrated in Fig. 13 .
  • a ratio of the spacer 55 in the expansion clearance 54 is defined as 100%.
  • a material obtained by mixing the same hard styrene foam resin as that for the spacer 55 in the first exemplary embodiment with the ceramic fiber used as the filler 56 in the first exemplary embodiment is usable.
  • the spacer 57 may be formed using exactly the same material (not including the ceramic fiber) as that for the spacer 55 of the first exemplary embodiment.
  • the castable refractory 51 is provided by the injection, a scaffolding can be omitted.
  • the spacer 57 can transmit the load from the heat-insulating bricks 52 to the fire bricks 53 and reliably receive the load or impact due to a head pressure associated with the injection of the castable refractory 51.
  • the spacer 57 disappears by being melted or the like due to the internal heat of the furnace after the hot-air stove is fired.
  • the ceramic fiber mixed in the spacer 57 remains as the expansion clearance 54 between the heat-insulating bricks 52 and the fire bricks 53 and can replace the functions of the filler 56 (see Fig. 1 ) of the first exemplary embodiment, and the expansion clearance 54 is more easily installed than that in the first exemplary embodiment.
  • the heat-storage-chamber furnace body 3 (see Fig. 14 ) that constitutes the above-described hot-blast stove 1 (see Fig. 24 ) is constructed.
  • the heat-storage-chamber furnace body 3 has the same structure as that of the combustion-chamber furnace body 2 (see Fig. 1 ) described in the first exemplary embodiment and includes the checker bricks 31 stacked inside the heat-storage-chamber furnace body 3, in the same manner as in the second exemplary embodiment. Accordingly, the duplicate description on the same structure and construction procedure as those in the second exemplary embodiment will be omitted.
  • the spacers 55 intermittently disposed and the filler 56 fed therebetween are used as the expansion clearance 54 in the same manner as in the first exemplary embodiment.
  • the spacer 57 in which the ceramic fiber is mixed is installed to fill the expansion clearance 54 at the ratio of 100% in the same manner as in the fourth exemplary embodiment.
  • the same advantages as the above-described advantages in the first exemplary embodiment can be also obtained in the heat-storage-chamber furnace body 3.
  • a differently structured combustion-chamber furnace body 2 (see Figs. 15 and 16 ) that constitutes the above-described hot-blast stove 1 (see Fig. 24 ) is constructed.
  • the lining 5 includes the expansion clearance 54 continuously extending in the radial direction and provided between the fire bricks 53 arranged in the circumferential direction of the furnace body, in the same manner as in the third exemplary embodiment.
  • the spacers 55 intermittently disposed and the filler 56 fed therebetween are used as the expansion clearance 54 in the same manner as in the first exemplary embodiment.
  • the spacer 57 in which the ceramic fiber is mixed is installed to fill the expansion clearance 54 at the ratio of 100% in the same manner as in the fourth exemplary embodiment.
  • the same advantages as the above-described advantages in the first exemplary embodiment can be also obtained in the lining 5 including the expansion clearance 54 continuously extending in the radial direction.
  • a differently structured combustion-chamber furnace body 2 (see Fig. 30 ) that constitutes the above-described hot-blast stove 1 (see Fig. 24 ) is constructed.
  • the expansion clearance 54 is formed between the heat-insulating bricks 52 and the fire bricks 53.
  • the expansion clearance 54 is disposed between the two layers of the heat-insulating bricks 52.
  • the spacer 57 is provided in the entirety of the expansion clearance 54 in the same manner as in the fourth exemplary embodiment. In other words, the ratio of the spacer 55 in the expansion clearance 54 is defined as 100%.
  • two fire bricks 53 (reference numerals 1 and 2) are initially stacked, one heat-insulating brick 52 (reference numeral 3) is stacked in a manner to press the two fire bricks 53, subsequently, the spacer 57 (reference numeral 4) as the expansion clearance 54 is installed, and another heat-insulating brick 52 (reference numeral 5) are stacked in a manner to press the spacer 57.
  • two fire bricks 53 (reference numerals 6 and 7) are stacked, one heat-insulating brick 52 (reference numeral 8) is stacked in a manner to press the two fire bricks 53, subsequently, the spacer 57 (reference numeral 9) is installed, and another heat-insulating brick 52 (reference numeral 10) is installed in a manner to press the spacer 57.
  • the castable refractory (reference numeral 11) is injected.
  • the heat-insulating bricks 52 are built while being pressed against the fire bricks 53 or the spacer 57. Accordingly, an advantage of an improved work efficiency for stacking the heat-insulating bricks 52 is obtained.
  • the invention is applicable not only to the combustion-chamber furnace body 2 and the heat-storage-chamber furnace body 3 of the hot-blast stove 1 (see Fig. 24 ) but also hot-blast stoves in other types.
  • the invention is applicable to a furnace wall of a combustion chamber section and a furnace wall of a heat storage chamber section in a single furnace body.
  • the double-layered heat-insulating bricks 52 may be replaced by single-layered heat-insulating bricks 52 or triple-layered or multilayered heat-insulating bricks 52.
  • the single-layered fire bricks 53 may be replaced by double-layered or multilayered fire bricks 53.
  • heat-insulating bricks 52 and the fire bricks 53 existing heat-insulating bricks and fire bricks are appropriately usable.
  • the free-flow value of the castable refractory 51 which represents the fluidity, is required to be 200 mm to 300 mm in considering of injecting the castable refractory 51. Adjustment in mixing is only necessary for achieving the free-flow value. Existing mixing components of the castable refractory 51 may be appropriately used for prepare the castable refractory 51.
  • the spacers 55 in various forms as described above are usable. It is desirable to adjust characteristics of the material depending on a form in use and conditions, size, arrangement and the like of the spacers 55 in the form. In particular, it is necessary to adjust the rigidity of the material as the spacer 55 to a predetermined value (rigidity sufficient to transfer the load applied when the castable refractory 51 is injected).
  • the material of the spacer 55 is not limited to the synthetic resin material such as the thermoplastic resin (e.g., the above-described hard styrene foam resin), but may be paper (e.g., cardboard) and the like.
  • the expansion clearance 54 including the spacer 55 may be located between the heat-insulating bricks 52 and the fire bricks 53 (e.g., the arrangement in the first exemplary embodiment) or between the fire bricks 53 (e.g., the arrangement in the third exemplary embodiment). In addition, the expansion clearance 54 including the spacer 55 may be located between two layers of the heat-insulating bricks 52.
  • the expansion clearance 54 can allow the thermal expansion of the fire bricks 53, and the spacer 55 is installed so as to prevent a thermal expansion allowance function of the expansion clearance 54 before the hot-blast stove is fired.
  • Example 1 Details of each of components and a construction procedure in Example 1 are as follows.
  • a 30-mm cubic spacer 55 made of styrene foam (thickness and height each are 30 mm) and a ceramic fiber filler 56 were installed as the expansion clearance 54, in which the spacer 55 was installed at every 460-mm pitch in a height direction and the filler 56 filled a gap between the spacers 55.
  • the fire bricks 53 were built inside the expansion clearance 54, the checker bricks 31 were further built inside the fire bricks 53, and subsequently, the castable refractory 51 was injected between the furnace shell 4 and the heat-insulating bricks 52.
  • L-shaped rulers 4A were set at 16 positions on the furnace shell 4 in the circumferential direction.
  • a position of an inner surface of the heat-insulating bricks 52 from the core 58 was marked on the L-type ruler 4A.
  • a leveling string 4B was connected between the position and an inner surface of the heat-insulating bricks 52 of the lower stage stacked in advance.
  • the heat-insulating bricks 52 were installed along the leveling string 4B.
  • the heat-insulating bricks 52 were installed while checking the curvature using an R-shaped ruler having the same curvature as that of the inner surface of the furnace shell 4 of the combustion-chamber furnace body 2.
  • the 30-mm cubic spacer 55 made of styrene foam (thickness and height each are 30 mm) and the ceramic fiber filler 56 were installed as the expansion clearance 54, in which the spacer 55 was installed at every 460-mm pitch in a height corresponding to a height of a single heat-insulating brick 52.
  • the castable refractory 51 was injected between the heat-insulating bricks 52 and the furnace shell 4.
  • a method of injecting the castable refractory includes: injecting about 100 kg to a first section (in the height of 250 mm); injecting another 100 kg to a second section positioned at 45 degrees shifted from the first section; repeating injecting in the same manner at total eight sections in one circumference of the heat-insulating bricks 52; and repeating injecting in the same manner in total five circumferences of the heat-insulating bricks 52 (in the height of 1250 mm).
  • the castable refractory 51 was favorably fed.
  • no displacement of the heat-insulating bricks 52 caused by the load of the castable refractory 51 was observed and the heat-insulating bricks 52 were favorably built.
  • Example 1 a construction period of the hot-blast stove was seven months as compared to eight months in a conventional method, so that the construction period was shortened by one month.
  • the invention relates to a method for constructing a hot-blast stove, and more specifically, to a method for constructing a hot-blast stove configured to supply hot air to a blast furnace.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Claims (6)

  1. Procédé de construction d'un régénérateur de haut fourneau,
    le régénérateur de haut fourneau (1) comprenant : un corps de four (2) comprenant une carcasse de four (4) et un revêtement (5) formé à l'intérieur de la carcasse de four (4),
    le revêtement (5) comprenant : un béton réfractaire coulable (51) installé à l'intérieur de la carcasse de four (4) ; des briques d'isolation thermique (52) installées à l'intérieur du béton réfractaire coulable (51) ; et des briques réfractaires (53) installées à l'intérieur des briques d'isolation thermique (52),
    le procédé comprenant le fait :
    d'installer les briques d'isolation thermique (52) et les briques réfractaires (53) à l'intérieur de la carcasse de four (4) à un intervalle de la carcasse de four ;
    d'injecter ensuite le béton réfractaire coulable (51) entre la carcasse de four (4) et les briques d'isolation thermique (52) ;
    de partager une force du béton réfractaire coulable (51) dans une direction radialement vers l'intérieur du corps de four, qui est provoquée par une pression de refoulement du béton réfractaire coulable, par les briques d'isolation thermique (52) et les briques réfractaires (53) afin d'éviter le déplacement ou la rupture des briques d'isolation thermique ; et
    de solidifier le béton réfractaire coulable (51) ;
    dans lequel le revêtement (5) comprend un espace de dilatation (54) entre les briques d'isolation thermique (52) et les briques réfractaires (53), entre les briques d'isolation thermique (52), ou entre les briques réfractaires (53), et
    l'espace de dilatation (54) comprend une entretoise (55) qui est interposée dans celui-ci, présente une résistance prédéterminée à température normale, et disparaît à un température interne du régénérateur de haut fourneau lors du fonctionnement,
    l'espace de dilatation (54) comprend une charge (56) qui est molle ou amorphe à température normale et qui est interposée dans celui-ci avec l'entretoise (55).
  2. Procédé de construction d'un régénérateur de haut fourneau selon la revendication 1, dans lequel l'entretoise (55) est une mousse de résine thermoplastique.
  3. Procédé de construction d'un régénérateur de haut fourneau selon l'une quelconque des revendications 1 et 2, comprenant le fait :
    d'installer une brique de ruchage(31) à l'intérieur du revêtement (5), où l'injection du béton réfractaire coulable (51) est réalisée pendant ou après l'installation de la de ruchage (31).
  4. Procédé de construction d'un régénérateur de haut fourneau selon l'une quelconque des revendications 1 à 3, comprenant en outre le fait :
    de diviser le corps de four (2) en une pluralité de sections agencées dans la direction de la hauteur ; et
    d'injecter le béton réfractaire coulable (51) dans chacune des sections.
  5. Procédé de construction d'un régénérateur de haut fourneau selon l'une quelconque des revendications 1 à 4, dans lequel
    les briques d'isolation thermique (52) sont installées dans une pluralité de couches dans la direction de l'épaisseur du revêtement, et
    des joints horizontaux dans une direction circonférentielle des briques d'isolation thermique dans les couches sont décalés les uns des autres.
  6. Procédé de construction d'un régénérateur de haut fourneau selon l'une quelconque des revendications 1 à 5, dans lequel
    le béton réfractaire coulable (51) a une valeur d'écoulement libre dans une plage allant de 200 mm à 300 mm.
EP14835034.1A 2013-08-06 2014-06-12 Procédé de construction d'un foyer à air chaud Not-in-force EP3031933B1 (fr)

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JP2013163520A JP5469774B1 (ja) 2013-08-06 2013-08-06 熱風炉の築炉方法
PCT/JP2014/065563 WO2015019704A1 (fr) 2013-08-06 2014-06-12 Procédé de construction d'un foyer à air chaud

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EP3031933A1 EP3031933A1 (fr) 2016-06-15
EP3031933A4 EP3031933A4 (fr) 2017-04-19
EP3031933B1 true EP3031933B1 (fr) 2018-11-28

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JP (1) JP5469774B1 (fr)
KR (1) KR101804829B1 (fr)
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JP5469774B1 (ja) 2014-04-16
KR101804829B1 (ko) 2017-12-05
EP3031933A1 (fr) 2016-06-15
KR20160040594A (ko) 2016-04-14
JP2015030907A (ja) 2015-02-16
WO2015019704A1 (fr) 2015-02-12
RU2615383C1 (ru) 2017-04-04
TWI608210B (zh) 2017-12-11
BR112016002453A2 (pt) 2017-08-01
EP3031933A4 (fr) 2017-04-19

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