WO2020202646A1 - Procédé de production de plaque à buses coulissantes - Google Patents

Procédé de production de plaque à buses coulissantes Download PDF

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Publication number
WO2020202646A1
WO2020202646A1 PCT/JP2019/048181 JP2019048181W WO2020202646A1 WO 2020202646 A1 WO2020202646 A1 WO 2020202646A1 JP 2019048181 W JP2019048181 W JP 2019048181W WO 2020202646 A1 WO2020202646 A1 WO 2020202646A1
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WO
WIPO (PCT)
Prior art keywords
plate
sic
mass
sliding nozzle
alumina
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PCT/JP2019/048181
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English (en)
Japanese (ja)
Inventor
智博 余多分
八反田　浩勝
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東京窯業株式会社
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Application filed by 東京窯業株式会社 filed Critical 東京窯業株式会社
Priority to CN201980094948.9A priority Critical patent/CN113646110A/zh
Priority to KR1020217031094A priority patent/KR20210144726A/ko
Publication of WO2020202646A1 publication Critical patent/WO2020202646A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28—Plates therefor
    • B22D41/30—Manufacturing or repairing thereof
    • B22D41/32—Manufacturing or repairing thereof characterised by the materials used therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
    • C04B35/043—Refractories from grain sized mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon

Definitions

  • the present invention relates to a method for manufacturing a plate for a sliding nozzle.
  • the molten steel is discharged from the container for storing the molten steel via the nozzle provided in the container.
  • the nozzle includes a sliding nozzle used to control the flow rate of the molten steel to be discharged.
  • the sliding nozzle has two sliding nozzle plates, an upper plate and a lower plate having an inner hole, or three sliding nozzle plates to which an inner plate is added, and these sliding nozzle plates are relatively slidable. As a result, the flow rate of the molten steel is controlled by adjusting the opening degree of the inner hole which is the molten steel flow path.
  • the sliding nozzle plate is made of refractory material.
  • Refractories include calcined carbon-containing plate refractories in which a raw material mainly composed of alumina is used as an aggregate, various metals, carbides, nitrides, carbon materials, etc. are added and fired at a temperature exceeding 1000 ° C.
  • Non-firing carbon-containing plate refractories heat-treated below are widely known.
  • alumina, mullite, zirconia mullite, alumina zirconia, spinel, magnesia and the like are used in combination according to the desired characteristics.
  • the structure is densified by adjusting the particle size composition, etc., to suppress the reaction between oxygen and outside air contained in the molten steel and carbon in the structure.
  • densification of the structure leads to an increase in the amount of thermal expansion of the entire refractory. As a result, the thermal shock resistance of the refractory may decrease.
  • metal powders such as Al and Al—Mg are widely known. If the particle size of these metal powders is fine, there is a risk of explosion during production, so it is difficult to use powders having a particle size smaller than a predetermined value.
  • metal powders such as Al and Al—Mg change to Al 4 C 3 in a temperature range of 1000 ° C. or higher, which causes a problem that the corrosion resistance of refractories is lowered.
  • a carbide such as B 4 C and SiC as an antioxidant. The effect of adding these carbides was not sufficiently exhibited at a high temperature of 1500 ° C. or higher, and it was difficult to continue densification of the refractory. To solve such a problem, as shown in Patent Document 1, it has been studied to contain Al 4 SiC 4 in a refractory material. Al 4 SiC 4 contributes to the densification of the structure of refractories.
  • the refractory material containing Al 4 SiC 4 has a problem that cracks are likely to occur. Specifically, a refractory material that has been heat-treated at a particularly high temperature (for example, 1200 ° C. or higher) is prone to cracking.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a plate for a sliding nozzle made of a refractory material in which the occurrence of cracks is suppressed even if heat treatment is performed at a high temperature.
  • the method for manufacturing a plate for a sliding nozzle of the present invention (hereinafter, referred to as the manufacturing method of the present invention) for solving the above problems is 2 to 23 mass% of Al 4 SiC 4 and 2 to 2 to 23 mass% when the whole is 100 mass%.
  • the temperature is 150 to 1400 ° C. It is characterized by heat treatment at the heating temperature of.
  • the plate produced by the production method of the present invention uses a phenol resin having a water content of 1% or less. According to this configuration, even if heat treatment is performed at a high temperature, the effect of forming a plate for a sliding nozzle made of a refractory material in which the generation of cracks is suppressed is exhibited.
  • a plate for a sliding nozzle is manufactured in each step shown in FIG.
  • the raw material for the sliding nozzle plate is prepared (raw material preparation step: S1). Specifically, Al 4 SiC 4 , carbon material, alumina, alumina-zirconia, zirconia mullite, magnesia, magnesia-spinel, and a phenol resin having a water content of 1% or less are prepared. Each of these raw materials is prepared in powder form.
  • Al 4 SiC 4 contributes to the densification of the structure of the manufactured plate.
  • Al 4 SiC 4 generates a gas containing Al by the reaction when exposed to a high temperature in the presence of carbon.
  • the gas containing Al diffuses throughout the voids in the plate (refractory). Then, it reacts with CO gas and recondenses as Al 2 O 3 and carbon. This recondensation (particularly the recondensation of Al 2 O 3 ) ultimately contributes to the densification of the structure. That is, the reaction of the following formula (1) proceeds.
  • Al 4 SiC 4 (s) + 6CO (g) 2Al 2 O 3 (s) + SiC (s) + 9C (s) ... (1)
  • Al 4 SiC 4 is prepared so as to be 2 to 23 mass% when the total of the prepared raw materials is 100 mass%.
  • Al 4 SiC 4 is contained in this ratio, the effect of adding Al 4 SiC 4 can be exhibited. If it is less than 2 mass%, the effect of densification cannot be fully exerted. Further, if it exceeds 23 mass%, the effect of densification can be exhibited, but cracks are likely to occur in the plate (refractory) during the heat treatment.
  • the content ratio of Al 4 SiC 4 is more preferably 3 to 20 mass%, further preferably 5 to 15 mass%.
  • the particle size (average particle size) of the Al 4 SiC 4 powder is not limited. It is preferably a powder having an average particle size of 5 ⁇ m to 200 ⁇ m.
  • the average particle size indicates the average particle size (D50) of the particle size distribution, and can be measured by a conventionally known method. When the average particle size is within this range, a dense plate (refractory) can be manufactured. If the average particle size is less than 5 ⁇ m, the particle size is too small and it becomes difficult to handle it. On the other hand, if the average particle size exceeds 200 ⁇ m, the average particle size becomes too large, and the pores formed by the decomposition of Al 4 SiC 4 become large, or the reactivity becomes low and the reaction does not proceed sufficiently. However, the effect of densification of the tissue cannot be sufficiently obtained.
  • Al 4 SiC 4 preferably has an S content of 100 ppm or less.
  • S (sulfur) contained in the manufacturing raw material for example, carbon black which is a carbon source of Al 4 SiC 4
  • the S content is 100 ppm or less, cracks in the plate (refractory) can be suppressed.
  • a large amount of S remains in Al 4 SiC 4
  • a large amount of hydrogen sulfide gas is generated by the reactions of the following equations (2) to (3). The hydrogen sulfide gas causes cracks when the plate (refractory) is heat-treated (heat treatment of the mixed powder in the subsequent step).
  • the reaction for producing aluminum sulfide proceeds, and in the formula (3), the reaction for producing hydrogen sulfide gas by hydrolysis of aluminum sulfide proceeds.
  • the carbon material serves as a carbon source for CO gas in the reaction of the above formula (1). Further, in the carbon material, voids are formed in the plate (refractory) by generating CO gas.
  • the carbon material is prepared so as to be 2 to 10 mass% when the total of the prepared raw materials is 100 mass%.
  • the carbon material is contained in this ratio, the effect of adding the carbon material can be exhibited. If it is less than 2 mass%, the effect of spalling resistance cannot be sufficiently exhibited. On the other hand, if it exceeds 10 mass%, the amount of alumina is relatively reduced, the oxidation resistance and the wear resistance are lowered, and the surface roughness of the plate (refractory) is likely to be induced.
  • the content ratio of the carbon material is more preferably 3 to 7 mass%.
  • the carbon material is a material that does not form a compound with other elements and is formed only from carbon.
  • the carbon material is preferably composed of one or more powders of scaly graphite, artificial graphite, pitch coke, and carbon black. By selecting the carbon material from these materials, CO gas can be generated in the reaction of the above formula (1).
  • the average particle size (D50) and particle size of the carbon material powder are not limited, and are preferably equal to or less than the powder of Al 4 SiC 4 .
  • Phenolic resin is added as a binder.
  • Phenolic resin has a water content of 1% or less.
  • 1% of the water content is a mass ratio when the mass of the phenol resin in the prepared and mixed state is 100 mass%.
  • the water content of the phenol resin is 1 mass% or less, the occurrence of cracks in the plate (refractory) can be suppressed. If water is contained in excess of 1 mass%, cracks will occur in the plate (refractory) in the subsequent heat treatment, especially when the heat treatment temperature is 1200 ° C. or higher.
  • the mechanism is not clear, but I think as follows.
  • Al 2 S 3 Due to the S contained (residual) in Al 4 SiC 4 , the production reaction of aluminum sulfide (Al 2 S 3 ) proceeds in some step in the refractory manufacturing process (the reaction of the above formula (2)). Then, the hydrolysis reaction of aluminum sulfide (Al 2 S 3 ) proceeds, and hydrogen sulfide gas (H 2 S) is produced (the reaction of the above formula (3)). When the heat treatment is performed, the produced Al 2 S 3 volatilizes, and at that time, the plate (refractory) is cracked.
  • the phenol resin is preferably added in an amount of 1 to 5 mass% when the total amount of the prepared raw material is 100 mass%. By having this ratio, the phenol resin functions as a binder. If the amount of phenol resin is less than 1 mass%, the amount of phenol resin contained is too small, and the function as a binder cannot be sufficiently exhibited. On the other hand, if it is contained in excess of 5 mass%, the amount of water contained in the entire plate (refractory) becomes excessively large, which may cause cracks in the plate (refractory).
  • the phenol resin may be liquid or solid, but is preferably liquid.
  • the rest is one or more of alumina, alumina-zirconia, zirconia mullite, magnesia, and magnesia-spinel. These metals or compounds form the main components of the plate (refractory).
  • the compound forming the balance is composed of powder, and its average particle size (D50) and particle size are not limited. A powder having an average particle size (particle size) sufficient for producing a conventional plate (refractory) can be used.
  • the prepared raw material may further be added with conventionally known additives.
  • this additive include a silicon compound (preferably metallic Si) for producing a residual carbon material and silicon carbide, and an antioxidant (for example, metallic Al).
  • the prepared raw materials are uniformly mixed (mixing step: S2).
  • the phenol resin (binder) is liquid, or when a liquid dispersion medium is further used, kneading is performed.
  • the specific method of uniformly mixing in this step is not limited. That is, they are uniformly mixed (kneaded) using a mixing device and a kneading device.
  • the mixture (kneaded product) is molded into a predetermined shape (molding step: S3).
  • the predetermined shape is the shape of the sliding nozzle plate.
  • the specific method of molding the mixture in this step is not limited. That is, it is molded into a predetermined shape by using a molding method such as mold molding or compression molding.
  • the molded product is heat-treated (heat treatment step). As the heat treatment in the heat treatment step, a drying step (S4) for drying the molded product and a firing step (S5) for firing the dried molded product are performed.
  • the drying step (S4) is a step of drying the molded product.
  • the drying step is a step of heating the molded body to evaporate the water content in the molded body.
  • the drying step (S4) is a process of heating the molded product so that water and volatile organic components can be evaporated, and the heating conditions are not limited. For example, heat treatment at 100 ° C. to 120 ° C. (in the air, under normal pressure conditions) can be mentioned.
  • the firing step (S5) is a step of firing the dried molded product. By firing the molded body, the reaction of the above formula (1) proceeds, and the molded body becomes a dense fired body.
  • the firing conditions in the firing step (S5) are not limited. For example, heat treatment at 150 to 1400 ° C. (under normal pressure conditions) is preferable, and heat treatment at 200 to 1300 ° C. (normal pressure conditions) is more preferable.
  • the heat treatment at 150 to 1400 ° C. (under normal pressure conditions) is preferably at least one of a heat treatment at 150 ° C. to 400 ° C. and a heat treatment at 1000 to 1400 ° C. This heating condition is selected according to the conditions required for the manufactured plate.
  • both the curing reaction of the phenol resin and the reaction of the above formula (1) proceed. Further, in the heat treatment at 1000 to 1400 ° C., the sintering reaction between the particles of the raw material powder also proceeds, and the strength of the plate becomes higher.
  • the heating temperature is 1400 ° C. or higher, the residual expansion of the plate (refractory) itself becomes large, and it becomes difficult to secure the initial strength when used as a plate.
  • the firing atmosphere may be a non-oxidizing atmosphere such as nitrogen gas or argon gas. Coke breeze may be packed in a container called a muffle and fired in it.
  • the fired body is impregnated with pitch (impregnation step: S6).
  • pitch is a general term for highly viscous hydrocarbons and includes tar.
  • the specific method of impregnating the pitch is not limited. It can be done by a conventionally known method.
  • the fired body is impregnated with pitch, but it may be impregnated with a material capable of exhibiting the same function. For example, a solution resin can be mentioned.
  • the impregnation step (S6) is an arbitrary step. That is, the plate may not be subjected to the impregnation step (S6).
  • a plate for a sliding nozzle can be manufactured by performing each of the above steps.
  • the plate produced in this embodiment is formed by molding a mixture (raw material powder) of a composite carbide, a carbon material, a metal powder, an oxide and a compound, and firing the mixture. That is, the plate produced in this embodiment has a structure in which the particles of the raw material powder are fixed or sintered in a dense state by firing, and it is difficult to specify the structure.
  • each of the above steps (S1 to S5) is performed.
  • a phenol resin added as a binder having a water content of 1% or less is used.
  • the production method of this embodiment it is possible to manufacture a plate that is dense and suppresses the occurrence of cracks.
  • Al 4 SiC 4 powder having an average particle size of 5 ⁇ m to 200 ⁇ m is used. When the average particle size is within this range, a dense plate can be manufactured.
  • Al 4 SiC 4 has an S content of 100 ppm or less. According to this configuration, the generation of hydrogen sulfide gas is suppressed, and the generation of cracks in the plate due to the hydrogen sulfide gas is suppressed.
  • the heat treatment in the firing step (S5) is a process of heating at a heating temperature of 150 to 1400 ° C. According to this configuration, a plate made of a dense fired body can be manufactured.
  • the phenol resin is added in an amount of 1 to 5 mass% when the whole is 100 mass%. According to this configuration, the phenol resin can function as a binder, and a plate having a predetermined shape can be produced.
  • the carbon material is made of one or more powders of scaly graphite, artificial graphite, pitch coke, and carbon black. According to this configuration, CO gas can be generated in the reaction of the above formula (1), and a plate made of a dense fired body can be produced.
  • a pitch impregnation step (S6) for impregnating the pitch is performed. According to this configuration, a plate having improved corrosion resistance (digestion resistance) can be manufactured.
  • the plate of this embodiment has 2 to 23 mass% of Al 4 SiC 4 and 2 to 10 mass% of carbon material, and the balance is alumina, alumina-zirconia, zirconia mullite, magnesia, magnesia-when the whole is 100 mass%.
  • the structure of the plate of this form cannot be unconditionally determined (that is, it is difficult to specify the structure).
  • Al 4 SiC 4 having an average particle size of 20 ⁇ m to 50 ⁇ m, carbon black (carbon material) having an average particle size of 20 ⁇ m to 200 ⁇ m, sintered alumina, metal Si having a particle size of 200 mesh or less, and a particle size of 200 mesh or less.
  • Metal Al of 200 mesh or less fused magnesia, solution phenol resin A (water content: 0.3 to 0.8 mass%), solution phenol resin B (water content: 1.4 to 1.8 mass) %) And prepare.
  • Al 4 SiC 4 had an S content of about 50 ppm.
  • the sintered alumina coarse particles having an average particle size of 3 to 1 mm, medium particles having an average particle size of 1 mm to 200 ⁇ m, and fine particles having an average particle size of less than 200 ⁇ m were appropriately blended. These raw materials were in powder form except for phenol resin. Then, the prepared raw materials are weighed at the ratios shown in Table 1, mixed uniformly, and molded into a block shape. The molded product was calcined in a non-oxidizing atmosphere at the temperatures shown in Table 1 for 24 hours. As described above, the test pieces of Samples 1 to 13 were produced.
  • Samples 1 to 9 are samples in which alumina (sintered alumina) is the main component and fired (heat treated) at a high temperature.
  • Samples 10 and 11 contain alumina (sintered alumina) as a main component and are fired (heat treated) at a low temperature.
  • Samples 12 and 13 are samples containing magnesia (electrofused magnesia) as a main component and calcined (heat treated) at a high temperature.
  • Samples 1 to 4, 10 and 12 correspond to the examples of the present invention.
  • Samples 5 to 9, 11 and 13 correspond to comparative examples.
  • Sample 5 does not contain Al 4 SiC 4 .
  • Sample 6 has a low content ratio of Al 4 SiC 4 .
  • Sample 7 has an excessively high content ratio of Al 4 SiC 4 .
  • Samples 5 and 8 have an excessively high water content of the phenol resin.
  • Sample 9 has an excessively high firing temperature.
  • Samples 11 and 13 do not contain Al 4 SiC
  • the appearance of the test pieces of Samples 1 to 13 was evaluated by ⁇ , ⁇ , and ⁇ , and is shown in Table 1.
  • the test piece in which no crack was confirmed was evaluated as ⁇
  • the test piece in which some crack or deformation was confirmed was evaluated as ⁇
  • the test piece in which large crack was confirmed was evaluated as ⁇ .
  • ⁇ indicates a case where a small crack that can be actually used as a plate is confirmed
  • ⁇ indicates a case where a large crack (deep crack) that cannot be actually used as a plate is confirmed.
  • the test piece is put into an electric furnace heated to 1200 ° C. and rapidly heated, and then the test piece is taken out and air is blown to quench it. The test piece after quenching was cut at a place where a crack was confirmed, and the depth of the crack was measured.
  • the measurement results were discriminated into large, medium, and small, and are shown in Table 1.
  • the "large” judgment result corresponds to a large number of cracks that can be seen and collapsed when touched.
  • the “middle” of the judgment result corresponds to a crack that can be seen to some extent and does not collapse even if touched.
  • “Small” in the judgment result corresponds to those in which cracks of about microcracks are visible to those in which cracks are not visible.
  • test pieces of Samples 1 to 4, 10 and 12 corresponding to the examples of the present invention all have a crack-free appearance.
  • the sample 7 having an excessively high content of Al 4 SiC 4 the sample 8 having an excessively high water content of phenol resin, and the sample 9 having an excessively high firing temperature, cracks and deformation of the test piece were confirmed. did it.
  • the test piece collapsed after the heat treatment, and the evaluation test could not be performed.
  • test pieces (main component: alumina, fired at high temperature) of Samples 1 to 4 corresponding to the examples of the present invention have an apparent porosity as the content ratio of Al 4 SiC 4 increases. It also has physical properties that reduce the bulk specific gravity and increase the bending strength.
  • the test piece of sample 10 (main component: alumina, fired at low temperature) corresponding to the embodiment of the present invention has an apparent porosity and bulk as compared with sample 11 (a sample having an excessively high water content of phenol resin). It has physical properties with low specific gravity and high bending strength.
  • test piece of sample 12 (main component: magnesia, fired at high temperature) corresponding to the embodiment of the present invention has an apparent porosity and bulk specific gravity as compared with sample 13 (sample not containing Al 4 SiC 4 ). It is small and has high bending strength.
  • sample 13 sample not containing Al 4 SiC 4
  • the physical properties of apparent porosity, bulk specific gravity, and bending strength are lower than those of each sample corresponding to the example. That is, the test piece of the example is dense and has excellent strength.
  • the test pieces (main component: alumina, fired at high temperature) of Samples 1 to 4 corresponding to the examples of the present invention have oxidation resistance as the content ratio of Al 4 SiC 4 increases. It has high physical properties.
  • the test piece of sample 10 (main component: alumina, calcined at low temperature) corresponding to the example of the present invention has physical properties having higher oxidation resistance than sample 11 (sample having an excessively high water content of phenol resin). have.
  • the test piece of sample 12 (main component: magnesia, fired at high temperature) corresponding to the example of the present invention has physical properties with high oxidation resistance as compared with sample 13 (sample not containing Al 4 SiC 4 ). are doing.
  • the index is 100 or more, and the oxidation resistance property is particularly deteriorated.
  • the test pieces (main component: alumina, fired at high temperature) of Samples 1 to 4 corresponding to the examples of the present invention have higher corrosion resistance as the content ratio of Al 4 SiC 4 increases.
  • the test piece of sample 10 (main component: alumina, calcined at low temperature) corresponding to the example of the present invention has physical properties with high corrosion resistance as compared with sample 11 (sample having an excessively high water content of phenol resin). are doing.
  • the test piece of sample 12 (main component: magnesia, fired at high temperature) corresponding to the example of the present invention has physical properties with high corrosion resistance as compared with sample 13 (sample not containing Al 4 SiC 4 ). There is.
  • the index is 100 or more, and the oxidation resistance property is particularly deteriorated.
  • the test pieces of Samples 1 to 4, 10 and 12 corresponding to the examples of the present invention are all excellent in thermal shock resistance.
  • samples 5, 11, 13, which do not contain Al 4 SiC 4 samples in which the content of Al 4 SiC 4 is excessively low 6, samples in which the content of Al 4 SiC 4 is excessively high 7, and the firing temperature are high.
  • samples 9 which is excessively high deep cracks are confirmed, and the heat impact resistance property is deteriorated.
  • the test pieces of Samples 1 to 4, 10 and 12 corresponding to the examples of the present invention are dense and have high strength, and are also excellent in oxidation resistance, corrosion resistance and heat impact resistance. It has become a sample.
  • the sample 8 in which the water content of the phenol resin is excessively large has cracks that do not occur in the sample 2 in which the water content of the phenol resin is within a predetermined range. That is, it can be seen that by setting the water content ratio of the phenol resin within a predetermined range, the plate is dense and has high strength, and is also excellent in oxidation resistance, corrosion resistance, and heat impact resistance.

Abstract

L'objectif de l'invention est de fournir un procédé de production et une plaque pour une plaque à buses coulissantes comprenant un matériau réfractaire dans lesquels l'apparition de fissures a été supprimée même lorsqu'un traitement thermique à haute température est effectué.　Ce procédé de production de plaque à buses coulissantes est caractérisé en ce qu'il comprend : le mélange (S1 et S2), lorsque 100 % en masse est le total, de 2 à 23 % en masse d'Al4SiC4 et de 2 à 10 % en masse d'un matériau carboné, le reste étant une résine de phénol ayant une teneur en humidité inférieure ou égale à 1 % et un ou plusieurs parmi l'alumine, l'alumine-zircone, la mullite-zircone, la magnésie et la magnésie-spinelle ; puis, le traitement thermique (S4 et S5) à une température de chauffage de 150 à 1 400 °C. La plaque selon la présente invention est caractérisée en ce qu'elle est produite par ce procédé de production.
PCT/JP2019/048181 2019-03-29 2019-12-10 Procédé de production de plaque à buses coulissantes WO2020202646A1 (fr)

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CN201980094948.9A CN113646110A (zh) 2019-03-29 2019-12-10 滑动喷嘴用板的制造方法
KR1020217031094A KR20210144726A (ko) 2019-03-29 2019-12-10 슬라이딩 노즐용 플레이트의 제조 방법

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JP2019-068567 2019-03-29
JP2019068567A JP6646779B1 (ja) 2019-03-29 2019-03-29 スライディングノズル用プレートの製造方法

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CN113979761B (zh) * 2021-11-23 2023-01-17 马鞍山利尔开元新材料有限公司 一种三元复合自修复免烧滑板砖及其制备方法

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