KR101493575B1 - Refractory molded article, manufacturing method for refractory molded article, and member for metal casting - Google Patents

Abstract

A novel fire-resistant molded article having low thermal conductivity, high homogeneity, and high durability against physical impact and thermal shock. The fire-resistant molded article according to any one of claims 1 to 3, wherein the fire-resistant molded article comprises an inorganic particle and a bundle of inorganic fiber aggregates, wherein the bundle of inorganic fiber aggregates is dispersed among the inorganic particles, Molded article having an internal structure in which the bundle of inorganic fibrous aggregates is dispersed between the inorganic particles bonded with a binder and containing a bundle of inorganic fibrous aggregates or particles of calcium silicate as inorganic particles And an internal structure in which a bundle of inorganic fiber aggregates is dispersed among the calcium silicate particles.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a refractory formed article, a refractory formed article,

FIELD OF THE INVENTION The present invention relates to a fire-resistant molded article, a method of manufacturing a refractory molded article, and a metal casting member.

When molten aluminum or molten magnesium is cast using a die casting technique, lasers are used as a container for transporting a predetermined amount of molten metal from the holding furnace to the casting machine and injecting the molten metal into the mold of the casting machine.

In a casting apparatus for mass production, lasers are mounted on a robot arm or the like and are automatically controlled, and a predetermined amount of molten metal is programmed to be poured from a holding furnace and transferred to a casting machine. Further, in a casting apparatus intended for small-scale production, lanes are manually controlled while being fixed to a manual lift handle or the like.

Currently, ladles are durable and resistant to high temperatures, and cast iron products account for more than 90% of the market.

However, since the cast iron has high thermal conductivity, when the cast iron ladle is used, the temperature of the holding furnace or the molten metal being conveyed is lowered. For this reason, there is a technical problem that the temperature of the holding furnace must be maintained at a temperature considerably higher than the casting temperature in consideration of the temperature drop of the holding furnace or the molten metal, and the energy loss is increased.

Therefore, laminates made of inorganic materials such as ceramics having low thermal conductivity have been required instead of cast iron lasers. However, the rails made of inorganic materials generally have a technical problem that they are weak against physical shock or thermal shock and have low durability I have.

In order to solve the above-mentioned problems, Patent Document 1 (Japanese Patent Application Laid-Open No. 2005-118878) discloses an E-glass made of E-glass, which is produced by sequentially adhering an E-glass fabric wetted with a slurry- Lattices made of ceramics reinforced with a fabric have been proposed.

In addition, as a constituent member of a metal casting apparatus, it is known that calcium silicate is mixed with carbon fiber in order to suppress occurrence of cracks due to thermal shock (see Patent Document 2 (Japanese Patent Laid-Open Publication No. 2009-234812) Reference).

Japanese Patent Application Laid-Open No. 2005-118878 Japanese Patent Application Laid-Open No. 2009-234812

In the method described in Patent Document 1, laminates made of ceramics reinforced with a fabric of E-glass having low thermal conductivity and impact resistance can be obtained. However, the fabrics moistened with the ceramic material in the form of a slurry can be formed by hand- There is a technical problem that it is difficult to improve the productivity because the production efficiency is low.

In addition to the ladle, the metal casting member which is in contact with the molten metal such as a trough, a molten metal retainer, a ladle, a float, a spout, a hot top ring header and the like has low thermal conductivity and excellent thermal shock resistance For example, in the case of using a member of the calcium silicate admixed with the carbon fiber described in Patent Document 2 as the metal casting member, since the temperature of the molten metal is higher than the heat resistant temperature of the carbon fiber, As a result, the carbon fibers gradually disappear, and cracks tend to occur.

Accordingly, it is an object of the present invention to provide a novel fire-resistant molded article having high thermal conductivity and high durability against physical impact and thermal shock, and high homogeneity, and a method of easily producing the refractory molded article under high productivity, And the like.

In order to achieve the above object, the inventors of the present invention have made intensive investigations and conceived a method of manufacturing a refractory molded article with high productivity by molding a kneaded product obtained by kneading inorganic particles and inorganic staple fibers.

However, the inventors of the present invention have found that the inorganic staple fibers are generally in the form of a short staple fiber aggregate in which a plurality of staple fibers are bound or twisted with a sizing agent, Is dispersed and dispersed in short fibers, the flowability of the kneaded product is remarkably lowered, and voids such as blowholes and voids are generated in the molded product to cause molding defects, so that only a very small amount of inorganic staple fibers can be added Proved. Since the thickness of the thinnest portion of the ladle is about 1 cm, when the void is generated, the homogeneity is lowered and sufficient toughness can not be given.

Based on the above knowledge, the present inventors have further studied and found that an internal structure comprising inorganic particles and a bundle of inorganic fiber aggregates, in which the bundle of inorganic fiber aggregates are dispersed among the inorganic particles, The present invention has been accomplished on the basis of the above findings.

That is,

(1) An internal structure of an internal combustion engine comprising an inorganic particle and an inorganic fibrous aggregate in the form of a bundle, wherein the bundle of inorganic fibrous aggregates is dispersed among the inorganic particles,

(2) A method for producing an inorganic fiber aggregate as described in (1) above, which has an internal structure comprising a binder, inorganic particles, and a bundle of inorganic fiber aggregates, (Hereinafter referred to as fire-resistant molded article 1 as appropriate),

(3) The fire-resistant molded article according to (2) above, which comprises the binder in an amount of 1 to 50 mass%, the inorganic particles in an amount of 30 to 95 mass%, and the bundle of inorganic fiber aggregates in an amount of 1 to 30 mass%

(4) The refractory molded article according to the above (2) or (3), wherein the bundled inorganic fiber aggregate has a diameter of 0.01 to 5 mm and a length of 3 to 30 mm,

(5) A method for producing a calcium-containing inorganic fiber aggregate as described in (1) above, which comprises calcium silicate particles as the inorganic particles and a bundle of inorganic fibrous aggregates, ) (Hereinafter referred to as fire-proof molded body 2 as appropriate), a fire-

(6) The fire-resistant molded article according to (5), wherein the inorganic particles are contained in an amount of 65 to 99 mass% and the bundle of inorganic fiber aggregates is contained in an amount of 1 to 30 mass parts,

(7) The fire-resistant molded article according to (5) or (6), wherein the bundled inorganic fiber aggregate has a diameter of 0.01 to 5 mm and a length of 3 to 200 mm,

(8) The fire-resistant molded article according to any one of (1) to (7), wherein the Charpy impact value measured by JIS R 1662 is 0.5 to 10 mJ /

(9) A fire-resistant molded article obtained by kneading an inorganic particle and a refractory forming material-forming material comprising a bundle of inorganic fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower, and then molding the obtained kneaded product A method for producing a molded article (hereinafter referred to as "Method 1"

(10) A method of kneading an inorganic molded product comprising a binder, inorganic particles, and a bundle of inorganic fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower, 9), a method of producing a fire-

(11) The refractory mold forming material according to any one of the above items (1) to (3), wherein the refractory mold forming material is a multilayer refractory comprising a solid content of 1 to 50 mass% of the binder, 30 to 95 mass% of the inorganic particles, (10), wherein the inorganic fiber aggregate is contained in an amount of 1 to 30 mass%

(12) The method for producing an refractory molded article according to (10) or (11), wherein the kneaded product has a tap flow value of 150 mm or more when measured by JIS R 5201,

(13) A slurry for forming an internal combustion engine comprising a raw material for calcium silicate particles and a bundle of inorganic fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower is dehydrated and then (Hereinafter, referred to as a fire-proof molded article production method 2, as appropriate), characterized in that the heat-

(14) The method for producing an refractory molded article according to (13), wherein the raw material of the calcium silicate particles is a lime raw material powder and a silicate raw material powder,

(15) The method for manufacturing an refractory molded article according to (14) above, wherein the hydrothermal treatment is carried out under a water vapor pressure of 7 kg /

(16) The method according to any one of the above items (1) to (5), wherein the refractory forming body slurry contains a bundle of inorganic fibrous aggregates in which the surface is coated with a resin having a glass transition temperature of 40 캜 or less, with respect to 100 parts by mass of the raw material of the inorganic particles, (13) to (15), which comprises a mass part,

(17) A bundle of inorganic fiber aggregates obtained by coating a resin having a glass transition temperature of 40 DEG C or lower on the surface of the bundle of inorganic fiber aggregates is in the range of 1 to 30 mass per 100 parts by mass of a resin having a glass transition temperature of 40 deg. (9) to (16), wherein the step (a)

(18) A resin composition comprising at least a surface of an inorganic-fiber-aggregated inorganic fiber aggregate, wherein the inorganic-fiber aggregate has an internal structure in which the bundle of inorganic fiber aggregates is dispersed among the inorganic particles, To provide a metal casting member.

The fire-resistant molded article such as the refractory 1 or the refractory 2 according to the present invention is made of an inorganic material such as inorganic particles, so that the thermal conductivity is reduced, and the homogeneity is high. By having the internal structure in which the aggregates are dispersed, the durability against physical impact and thermal shock can be improved.

According to Production Method 1 of the refractory molded article of the present invention, in the production of the refractory molded article, inorganic fibrous material is obtained by using a bundle of inorganic fibrous aggregates formed by covering the surface with a resin having a glass transition temperature of 40 캜 or less, It is possible to suppress fibrillation and dispersion of the individual inorganic fibers at the time of kneading, and even when a large amount of the inorganic fiber aggregate is used, the refractory molded article can be easily produced with high productivity.

In addition, according to Production Method 2 of the refractory molded product of the present invention, it is possible to obtain a refractory molded article comprising a raw material for inorganic particles, which contains a raw material of calcium silicate particles as a raw material of inorganic particles, It is possible to simultaneously form the refractory body while synthesizing the inorganic particles while dispersing the bundle of inorganic fiber aggregates by dewatering the slurry for forming the refractory formed body and then hydrothermally treating the slurry for forming the refractory forming body, It is possible to suppress fibrillation and dispersion on the fibers, and even when a large amount of the inorganic fiber aggregate is used, the refractory molded article can be easily manufactured with high productivity.

Further, according to the present invention, it is possible to provide a metal casting member having a reduced thermal conductivity, high homogeneity, and improved durability against physical impact and thermal shock.

1 is a schematic view of lasers obtained in an embodiment of the present invention.
Figure 2 is a schematic view of the procedure taken in an embodiment of the present invention.
3 is a sectional view of the refractory 1 obtained in the embodiment of the present invention.
4 is a sectional view of the fire-resistant molded article 2 obtained in the embodiment of the present invention.

First, the fire-resistant molded article of the present invention will be described.

The refractory molded article of the present invention is characterized in that it comprises an inorganic particle and a bundle of inorganic fibrous aggregates and has an internal structure in which the bundled inorganic fibrous aggregate is dispersed among the inorganic particles.

Specific examples of the refractory product of the present invention include refractory 1 and refractory 2.

The refractory 1 has an internal structure in which the bundle of inorganic fiber aggregates is dispersed between the inorganic particles bonded with the binder, the binder 1, the inorganic particles, and the bundle of inorganic fiber aggregates, The formed body 2 contains calcium silicate particles as inorganic particles and has an internal structure in which a bundle of inorganic fiber aggregates is dispersed among the calcium silicate particles.

The refractory 1 and the refractory 2 are different in that the refractory 1 contains a binder and that the refractory 2 contains the calcium silicate particles as inorganic particles. , The following description will be made while appropriately preparing them.

In the refractory molded article of the present invention, the inorganic particles are refractory particles that function as a matrix component of the refractory formed article (the main component forming the framework of the refractory formed article), and arbitrary refractory inorganic particles can be used.

When the refractory 1 of the present invention is the refractory 1, examples of the inorganic particles include silica particles, alumina particles, mullite particles, silicon carbide particles, silicon nitride particles, silicon aluminum oxynitride particles, zircon particles, (BN) particles, aluminum nitride (AlN) particles, titanium diboride (TiB ₂ ) particles, fly ash balloon particles, pearlite particles, vermiculite particles, fluoride particles Calcium oxide particles, magnesium fluoride particles, calcium oxide particles, magnesium oxide particles, barium oxide particles, barium sulfate particles, and the like.

When the refractory molded body according to the present invention is the refractory formed body 2, calcium silicate particles are included as the inorganic particles, and specifically, xenonite particles, tobermorite particles, wollastonite particles and the like can be mentioned.

The average particle diameter of the inorganic particles is preferably 0.1 to 6000 mu m, more preferably 0.1 to 5000 mu m, and most preferably 0.1 to 4500 mu m. When the average particle diameter of the inorganic particles is less than 0.1 mu m, the surface area increases, and the refractory article tends to adhere to the dispersion medium at the time of production of the refractory product, and the fluidity tends to deteriorate.

In the present application document, the mean particle diameter means a value measured by a laser diffraction / scattering method, and can be measured using, for example, "SALD-2200" manufactured by Shimadzu Corporation.

The fire-resistant molded article of the present invention preferably contains 30 to 99 mass% of inorganic particles.

When the refractory 1 of the present invention is a refractory 1, it preferably contains 30 to 95 mass% of inorganic particles, more preferably 40 to 90 mass%, and more preferably 45 to 80 mass% desirable.

When the fire-resistant molded article of the present invention is the fire-resistant molded article 2, it is preferable that the fire-resistant molded article contains the inorganic particles in an amount of 65 to 99 mass%, more preferably 75 to 96 mass%, and more preferably 80 to 95 mass% Is more preferable.

When the content of the inorganic particles is within the above range, sufficient strength can be easily imparted to the refractory, and the shape of the refractory can be easily maintained in a desired shape.

The content of the inorganic particles can be calculated from the amount of raw materials used in the manufacture of the refractory molded article.

In the fire-resistant molded article of the present invention, the inorganic fiber constituting the bundle-shaped inorganic fiber aggregate is not particularly limited as long as it has a predetermined heat resistance (fire resistance) according to the use of the refractory molded article. Examples thereof include glass fiber, , Water-light fibers, silica-alumina fibers, rock wool fibers, and the like. In the case where the inorganic fiber is formed by a method accompanied by a hydrothermal treatment such as production method 2 of a fire-resistant molded article described later, the fire-resistant molded article of the present invention is preferably glass fiber, Alkali glass fibers are preferred.

In the refractory molded article of the present invention, the bundled inorganic fiber aggregate may be formed by cutting strands obtained by cutting a plurality of filaments (also referred to as short fibers or continuous fibers) to a predetermined length, or by cutting a plurality of filaments A plurality of strands are wound in a predetermined length, a plurality of strands are twisted together to form a yarn (continuous yarn) cut to a predetermined length, a plurality of strands And fibers obtained by collecting short fibers parallel to the fiber length direction and forming a continuous bundle. Of these bundle-shaped inorganic fiber aggregates, cut strands that are easy to obtain, or roving or composite yarns which are cut to a predetermined length are suitable, and it is more preferable that the continuous yarn is cut to a predetermined length. The reason why the composite yarn is cut to a predetermined length is that it is easy to generate irregularities due to twist on the surface and easily exhibit an anchor effect in the refractory.

In the refractory molded article of the present invention, the bundle of inorganic fiber aggregates preferably contains 20 to 10,000 aggregated inorganic fibers, more preferably 100 to 8,000 aggregated inorganic fibers, more preferably 200 to 6000 It is more preferable that it is aggregated.

In the refractory molded article of the present invention, the clustered inorganic fiber aggregate varies depending on the specific gravity of the inorganic fibers, but the fineness thereof is preferably 10 to 5000 tex, more preferably 50 to 4000 tex, and most preferably 100 to 3000 tex More preferable.

Further, in the present application document, the fineness of 1 tex means that the weight per 1000 m of the bundle-like inorganic fiber aggregate is 1 g.

In the refractory molded article of the present invention, the bundled inorganic fiber aggregate preferably has a diameter of 0.01 to 5 mm, more preferably 0.05 to 4 mm, and further preferably 0.1 to 3 mm.

In the refractory molded article of the present invention, the bundled inorganic fiber aggregate preferably has a length of 3 to 200 mm.

In the case where the refractory 1 of the present invention is the refractory 1, the aggregated inorganic fibrous aggregate preferably has a length of 3 to 30 mm, more preferably 5 to 25 mm, and even more preferably 10 to 20 mm .

When the fire-resistant molded article of the present invention is the fire-resistant molded article 2, the bundle-shaped inorganic fibrous aggregate preferably has a length of 3 to 200 mm, more preferably 10 to 120 mm, further preferably 20 to 80 mm Do.

In the present application document, the diameter and the length of the bundled inorganic fiber aggregate mean the arithmetic average value when the diameter and length of 100 bundled inorganic fiber aggregates are measured.

When the diameter, the length, and the length of the bundle-shaped inorganic fiber aggregate are within the above range, the fire-resistant molded article is liable to contain a large amount of the inorganic fiber bundles, and the inorganic fiber bundle is difficult to escape from the refractory. It becomes easy to impart high toughness.

In the refractory molded article of the present invention, the bundled inorganic fiber aggregate preferably has a density of 0.5 to 4 g / cm 3, more preferably 1 to 3 g / cm 3, and still more preferably 1.5 to 3 g / cm 3.

The fire-resistant molded article of the present invention preferably comprises 1 to 3% by mass of a bundle of inorganic fiber aggregates.

When the fire-resistant molded article of the present invention is a fire-resistant molded article 1, it preferably contains 1 to 30 mass%, more preferably 5 to 30 mass%, and more preferably 10 to 30 mass% Is more preferable.

When the fire-resistant molded article of the present invention is a fire-resistant molded article 2, it preferably contains 1 to 30 mass%, more preferably 2 to 20 mass%, and 2 to 13 mass% Is more preferable.

Since the fire-resistant molded article of the present invention comprises 1 to 30 mass of bundle-shaped inorganic fiber aggregates, sufficient toughness can be imparted to the fire-resistant molded article. If the content of the bundle-shaped inorganic fiber aggregate is less than 1% by mass, it is difficult to impart sufficient toughness to the refractory molded product. If the content of the bundled inorganic fiber aggregate exceeds 30% by mass, the flowability of the molding material decreases during molding.

The content of the bundle-shaped inorganic fiber aggregate can be calculated from the amount of raw materials used in manufacturing the refractory molded article.

In the case where the refractory 1 of the present invention is the refractory 1, the refractory 1 comprises the inorganic particles and the bundle of inorganic fibrous aggregates as well as a binder as an essential component.

The binder is preferably an inorganic binder, and examples of the inorganic binder include cement, aluminum phosphate, sodium silicate, and colloidal silica. Of these, cement is preferable.

The cement is not particularly limited as long as it functions as an inorganic binder. Examples of the cement include at least one selected from Portland cement, white cement, fly ash cement, silica cement, hydraulic cement such as alumina cement, and the like. As the above-mentioned cement, alumina cement having high heat resistance is suitable. Here, the term "alumina cement" means cement containing CaO.Al ₂ O ₃ as a main component. For example, the content of Al ₂ O ₃ is preferably 70% by mass or more.

When the refractory 1 of the present invention is the refractory 1, the refractory 1 preferably contains 1 to 50% by mass of the binder, more preferably 5 to 40% by mass, and more preferably 10 to 40% Is more preferable. When the content of the binder is less than 1% by mass, it is difficult to sufficiently bond the inorganic particles or the like. When the content of the binder exceeds 50% by mass, the content ratio of other components such as inorganic particles decreases and it becomes difficult to impart sufficient strength to the refractory.

When the refractory molded article of the present invention is the refractory molded article 2, it is preferable not to include a binder, but may include a binder. Examples of the binder that can be contained in the fire-resistant molded article 2 include those described above. In this case, the fire-proof molded article 2 may contain, for example, less than 1% by mass of a binder.

When the refractory molded article of the present invention is the refractory molded article 2, carbon fiber, pulp, rayon, polyester fiber, alkali-resistant glass fiber, or the like may be included as the fiber component.

The content of the fiber component in the refractory formed body 2 is preferably 5% by mass or less in terms of solid content.

Further, in the present application document, the fiber component means a short fiber which is distinguished from the bundled inorganic fiber aggregate and added to secure moldability.

The fire-resistant molded article of the present invention is suitably one in which the bundle of inorganic fibrous aggregates has an internal structure in which inorganic fibrous aggregates are dispersed among the inorganic particles, and the bundle of inorganic fibrous aggregates is uniformly dispersed throughout the refractory.

Since the refractory molded article of the present invention has an internal structure in which a bundle of inorganic fiber aggregates are dispersed, high toughness can be exhibited.

The fire-resistant molded article of the present invention preferably has a Charpy impact value of 0.5 to 10 mJ / mm 2 as measured by JIS R 1662. When the Charpy impact value is within the above range, sufficient toughness can be imparted to the refractory formed body.

The fire-resistant molded article of the present invention preferably has a flexural strength of 1 to 20 MPa as measured by JIS A 1408. When the flexural strength is within the above range, sufficient strength can be imparted to the refractory.

Specific examples of the refractory molded article according to the present invention include metal casting members. Examples of the metal casting members include a metal casting molten metal holding member, a metal casting apparatus constituting member, and a constituent material thereof.

Specific examples of the above metal casting molten metal holding member include a ladle, a trough, a molten metal holding furnace, and the like. Examples of the metal casting apparatus constituting member include a float, a spout, a hot top ring header, .

The refractory molded article of the present invention can be suitably produced by the refractory molded article manufacturing method of the present invention. Specifically, the refractory 1 according to the present invention can be suitably manufactured by the production method 1 of the refractory formed product of the present invention to be described later, and the refractory 1 according to the present invention can be produced by the production method 2 And can be suitably manufactured.

The refractory molded article of the present invention can also be produced by a method other than the refractory molded article manufacturing method of the present invention. For example, in the method 1 of the refractory molded article of the present invention described later, A method of using a yarn obtained by cutting a yarn which is obtained by twisting a plurality of strands with a predetermined strength and having no resin coating on the surface thereof to a predetermined length can be used instead of the bundle- . In this case, by strengthening the twist in the production process of the yarn, even when the refractory forming material is kneaded, the inorganic fiber aggregate can be present in the refractory mold while keeping the bundle shape without fibrillation.

According to the refractory molded product of the present invention, since it has an internal structure formed by inorganic materials such as inorganic particles and a bundle of inorganic fibrous aggregates dispersed among the inorganic particles, the thermal conductivity is reduced, The durability against thermal shock can be improved. In the case where the refractory of the present invention is the refractory formed product 2, the refractory 1 may contain only a small amount of the binder or may not contain a binder, and in this case, the thermal conductivity can be more effectively reduced.

Next, a method of manufacturing an refractory molded article of the present invention will be described.

The refractory molded article manufacturing method of the present invention comprises the refractory molded article production method 1 and the refractory molded article production method 2. Firstly, the refractory molded article manufacturing method 1 will be described first and then the refractory molded article manufacturing method 2 will be described.

Production method 1 of the refractory molded article of the present invention is a method for producing an refractory molded article which comprises kneading an inorganic particle and a refractory forming material-forming material comprising a bundle of inorganic fibrous aggregates formed by coating a surface with a resin having a glass transition temperature of 40 DEG C or lower, And then molding it.

The production method 1 of the refractory molded article of the present invention is particularly preferably applicable to the production of the refractory 1 of the present invention.

In Production Method 1 of the refractory molded article of the present invention, examples of the inorganic particles include those described in the above description of the refractory 1 of the present invention.

In the fireproof molded article production method 1 of the present invention, the refractory forming material preferably contains 30 to 95% by mass of inorganic particles (when converted into a solid content), more preferably 40 to 90% by mass By mass, and more preferably 45 to 80% by mass.

When the content of the inorganic particles is within the above range, it is easy to impart sufficient strength to the obtained refractory, and the shape of the resulting refractory can be easily maintained in a desired shape.

In the fireproof molded article production method 1 of the present invention, the refractory molded body-forming material includes a bundle of inorganic fibrous aggregates formed by coating a surface with a resin having a glass transition temperature of 40 캜 or lower.

As the bundled inorganic fiber aggregate, those described above may be mentioned.

The resin to be coated on the surface of the bundle-shaped inorganic fiber aggregate is not particularly limited as long as it is a resin having a glass transition temperature of 40 DEG C or lower. Examples thereof include acrylonitrile / butadiene copolymer latex, styrene / butadiene copolymer latex, Coalesced latex and the like.

In the production method 1 of the refractory molded article of the present invention, a resin having a glass transition temperature of 40 DEG C or higher may be coated on the surface of the bundle of inorganic fiber aggregates in addition to the resin having a glass transition temperature of 40 DEG C or lower. Examples of the resin having a glass transition temperature higher than 40 DEG C include polystyrene, polyethylene terephthalate, and polycarbonate. By using a resin having a glass transition temperature of 40 DEG C or lower and a resin having a glass transition temperature of 40 DEG C or higher, drying treatment after kneading can be easily performed. When a resin having a glass transition temperature of 40 DEG C or lower and a resin having a glass transition temperature of 40 DEG C or higher is used, the content of the resin having a glass transition temperature of 40 DEG C or lower in the whole of the resin to be coated is 50 to 99 mass% It is preferable that the resin having a glass transition temperature of 40 ° C or higher is 1 to 50 mass%.

It is possible to impart a certain degree of flexibility to the inorganic fiber aggregate by coating the surface of the inorganic fiber aggregate having a bundle shape with a resin having a glass transition temperature of 40 DEG C or lower. Therefore, even when kneading the refractory forming material, , It is possible to allow the resin to remain in the refractory mold while maintaining the shape of the bundle.

The amount of the resin to be coated on the surface of the bundle-shaped inorganic fiber aggregate is preferably 1 to 30 parts by mass, more preferably 1 to 20 parts by mass, and more preferably 3 to 15 parts by mass relative to 100 parts by mass of the bundled inorganic fiber aggregate More preferably 5 to 15 parts by mass.

When the amount of the resin coated on the surface of the inorganic fiber aggregate in the form of a bundle is less than 1 part by mass with respect to 100 parts by mass of the bundled inorganic fiber aggregate, it is difficult to keep the inorganic fiber aggregate in a bundle state during the kneading treatment. When the amount exceeds 30 parts by mass , Pores are generated around the inorganic fiber aggregate after firing, so that the inorganic fibrous aggregate tends to be detached, and toughness of the obtained refractory molded article is likely to be lowered.

The coating of the resin on the bundled inorganic fiber aggregate can be carried out, for example, by impregnation or spraying.

In the fireproof molded article production method 1 of the present invention, the refractory forming material preferably contains 1 to 30% by mass of a bundle of inorganic fibrous aggregates formed by covering the surface with a resin having a glass transition temperature of 40 캜 or less, By mass to 30% by mass, and more preferably 10 to 30% by mass.

Also in the case where the refractory forming body forming material includes a binder described later, the content ratio of the bundled inorganic fiber aggregate is preferably within the above range.

In the fireproof molded article production method 1 of the present invention, the fire-resistant molded article can be provided with sufficient toughness by containing 1 to 30 mass% of a bundle of inorganic fibrous aggregates.

In the fireproof molded article production method 1 of the present invention, it is preferable that the refractory molded body-forming material includes a binder. Examples of the binder include those described above. By including the binder in the refractory forming body forming material, it becomes easy to sufficiently bond inorganic particles and the like, and to give sufficient strength to the resulting refractory molded body.

In the method 1 of producing an refractory of the present invention, when the refractory forming material comprises a binder, the solid content preferably contains 1 to 50 mass% of the binder, more preferably 5 to 40 mass% , And more preferably 10 to 40 mass%. If the content of the binder in the solid content is less than 1% by mass, it is difficult to sufficiently bind the inorganic particles or the like. When the content exceeds 50% by mass, the content of other components such as inorganic particles decreases, It is difficult to impart sufficient strength and heat resistance.

As described above, when a fire-resistant molded article is to be produced by kneading inorganic particles and inorganic fibers, aggregates of inorganic fibers are fibrillated with individual inorganic fibers at the time of kneading, dispersed and significantly reduced in fluidity, Only a very small amount of inorganic fibers could be added to the molded article. In order to solve this technical problem, the present inventors have intensively studied and, as a result, surprisingly found that the use of a bundle of inorganic fiber aggregates obtained by coating a surface with a resin having a glass transition temperature of 40 캜 or less, And that a large amount of the inorganic fiber aggregate can be contained in the obtained refractory molded product while suppressing the fibrillation of the inorganic fiber aggregate. Thus, the present invention has been completed.

In the method 1 of the refractory molded article of the present invention, the refractory forming material may include a solvent such as monohydric alcohols such as water, ethanol and propanol, and polar organic solvents such as dihydric alcohols such as ethylene glycol , And the refractory-molded body-forming material contains a solvent, so that the solid content can be easily dispersed and flowed into the molding die. The amount of the solvent to be added can be appropriately set according to the bulk density and the intended use of the desired fire-resistant molded body material.

In the method 1 of the refractory molded article of the present invention, the method for producing the refractory-molded body forming material is not particularly limited and may be an inorganic particle or a bundle of inorganic fibrous aggregates or the like formed by covering the surface with a resin having a glass transition temperature of 40 캜 or lower Or a method in which the solid content and the solvent are put into a kneader and stirred to some extent before kneading.

The kneading can be carried out by using a known kneading device such as a universal stirrer and various kneaders, and is preferably carried out using a dispersion kneader such as an ultrasonic processor, a cutter mixer or a three roll mill. When a kneader is used as the kneading apparatus, the number of revolutions and the kneading time of the kneader can be appropriately set according to the bulk density and the use of the desired refractory material.

In the production method 1 of the refractory molded product of the present invention, it is preferable that the kneaded product obtained by the kneading treatment has a tap flow value of 150 mm or more as measured by JIS R 5201. Although the upper limit of the tap flow value is not particularly limited, it is appropriate that the tap flow value is usually 300 mm or less. In the method 1 of the refractory molded article of the present invention, the tap flow value of the kneaded product can be controlled to 150 mm or more even when the refractory molded body-forming material contains a large amount of inorganic fibrous aggregate, It is possible to manufacture a refractory molded article having high homogeneity without forming voids such as blowholes and voids.

In Production Method 1 of the refractory molded article of the present invention, the kneaded material obtained by kneading the refractory molded body-forming material is molded according to a desired method.

The molding is preferably carried out by filling the refractory mold-forming material into a molding die.

The filling of the kneaded product into the molding die is preferably carried out while being degassed using, for example, a flexible vibrator or the like. As the molding die, a wooden mold, a metal mold, a synthetic resin mold, or the like can be used. Of these molding dies, a synthetic resin type is suitable in terms of dimensional accuracy and dimensional stability.

In order to accelerate the absorption of the solvent into the molding die during the molding, pressurization or vacuum drawing may be performed additionally.

The above-mentioned molding can also be carried out by applying a kneaded product obtained by adjusting the viscosity so as to have a desired viscosity to a desired portion (for example, a casing surface).

In Production Method 1 of the refractory molded article of the present invention, it is preferable that the kneaded material is filled in a molding die, and then dried and baked if necessary.

The kneaded product is cured (left for about one day) at room temperature in a state in which the kneaded product is placed in a molding die or coated in the shape of an object, and then molded when molded in a molding die, By heating for about 24 hours.

When the atmosphere temperature (room temperature) becomes negative at the time of molding, there is a case that demoulding can not be carried out in one day. Therefore, after being poured into a molding die, it is cured in a temperature atmosphere of about 15 to 30 ° C desirable.

The baking treatment of the dried product obtained by the drying treatment is preferably carried out at a temperature of 300 to 1300 캜 for about 0.5 to 4 hours. Crystallization water in the dried product can be removed by baking treatment.

The fire-resistant molded article obtained by the production method 1 of the refractory molded article of the present invention includes the same ones described in the explanation of the refractory molded article of the present invention. In the method 1 of the refractory molded article of the present invention, when the refractory mold-forming material comprises a binder, the refractory 1 of the present invention can be suitably produced.

Next, Production Method 2 of the refractory molded article of the present invention will be described.

Production method 2 of the refractory molded article of the present invention is a method for producing a refractory formed body slurry containing a raw material of calcium silicate particles and a bundle of inorganic fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 캜 or lower , Followed by dewatering, followed by hydrothermal treatment, and then drying treatment.

The production method 2 of the refractory molded article of the present invention can be preferably applied to the case of producing the refractory article 2 of the present invention.

In Production Method 2 of the refractory molded product of the present invention, the calcium silicate particles may be the same as those described in the description of the fire-proof molded body 2 of the present invention.

In Production Method 2 of the refractory molded article of the present invention, as the raw material of the calcium silicate particles, a lime raw material powder and a silicate raw material powder can be mentioned.

Examples of the powder of the lime raw material include at least one kind of powder selected from the group consisting of calcium hydroxide, calcined lime, and carbide powder. Examples of the powdery silicate powder include powders of one kind or more selected from diatomaceous earth, silica and ferrosilicone dust.

In Production Method 2 of the refractory molded product of the present invention, when the raw material of the calcium silicate particles comprises the lime raw material powder and the silicate raw material powder, when the lime raw material powder is converted to CaO and the silicate raw material powder is converted to SiO ₂ , The mixing ratio (CaO / SiO ₂ ) of the raw material powder to the raw material powder is preferably 0.6 to 1.3, more preferably 0.8 to 1.2, and even more preferably 0.9 to 1.1 in molar ratio.

The lime raw material powder and the silicate raw material powder are slurried and subjected to a hydrothermal treatment and a drying treatment as described later to produce calcium silicate particles such as xenonite particles and tobermorite particles in the refractory.

In the method 2 of the refractory molded product of the present invention, when a material comprising a lime raw material powder and a silicate raw material powder is used as a raw material of the inorganic particles, the slurry for forming a refractory molded body preferably contains, as solids (at the time of solid content conversion) More preferably 25 to 80% by mass, further preferably 35 to 55% by mass, based on the total amount of the silicate raw material powder and the silicic acid raw material powder.

When the content of the raw material of the inorganic particles is within the above range, it is easy to impart sufficient strength to the obtained refractory molded article while uniformly dispersing a bundle of inorganic fiber aggregates formed by coating the surface with a resin having a glass transition temperature of 40 캜 or less The shape of the obtained refractory molded body can be easily maintained in a desired shape.

In the fireproof molded article production method 2 of the present invention, the refractory molded body slurry may contain calcium silicate particles in addition to the raw material of the calcium silicate particles as the raw material of the inorganic particles.

Examples of the calcium silicate particles which can be contained in the slurry for forming a refractory molded body include calcium silicate hydrate particles, specifically, xenonite particles and tobermorite particles, and xenonite particles are preferred.

The calcium silicate hydrate particles can be prepared by a known method using the above-described lime raw material powder and silicic acid raw material powder. By using the calcium silicate hydrate particles in addition to the raw material of the inorganic particles, the handling property after the dewatering forming treatment Can be improved.

In the method 2 of the refractory molded article of the present invention, when a material containing a lime raw material powder and a silicate raw material powder is used as a raw material of the inorganic particles and the calcium silicate hydrate particles are used, the slurry for forming a refractory- , The content of the lime raw material powder and the amount of the silicate raw material powder is set to 100 parts by mass, the content of the calcium silicate hydrate particles is preferably 3 to 95 parts by mass, more preferably 5 to 30 parts by mass .

When the content ratio of the calcium silicate hydrate particles is within the above range, the handling properties after the dewatering treatment described later can be effectively improved.

In the fireproof molded article production method 2 of the present invention, the refractory molded body slurry may contain wollastonite particles as calcium silicate particles.

Wollastonite is an inorganic substance having an irregular silicon-oxygen chain (SiO ₃ ) structure linked with calcium cations and having a crystal structure represented by CaSiO ₃ (CaO · SiO ₂ ), but is macroscopically in powder form . The wollastonite calculated as a natural mineral may be calculated as a wollastonite in a limestone zone and may contain a trace amount of Al ₂ O ₃ or Fe ₂ O ₃ as an impurity (for example, less than 0.5 wt%). Specific examples of the wollastonite particles include NYARD-G manufactured by USA Interface.

In the fireproof molded article production method 2 of the present invention, the slurry for forming a refractory molded body contains wollastonite particles to improve machinability and improve the dimensional stability of the resulting refractory.

In the method 2 of the refractory molded article of the present invention, when a material containing a lime raw material powder and a silicic acid raw material powder is used as a raw material of calcium silicate particles, and when wollastonite particles are used, the slurry for forming an anti- , The lime raw material powder and the silicic acid raw material powder is set to 100 parts by mass, the content of the wollastonite particles is preferably 7 to 120 parts by mass, more preferably 10 to 90 parts by mass.

When the content of the wollastonite particles is within the above range, the machinability can be effectively improved and the dimensional stability of the resulting refractory molded article can be improved.

In the method 2 of the refractory molded article of the present invention, when a material containing a lime raw material powder and a silicate raw material powder is used as a raw material of the inorganic particles, and also calcium silicate hydrate particles and wollastonite particles are used, When the total content of the lime raw material powder and the silicic acid raw material powder is 100 parts by mass in terms of solid content, it is preferable that the calcium silicate hydrate particle is contained in an amount of 5 to 170 parts by mass, and the content is 11 to 50 parts by mass More preferable. In this case, when the total amount of the lime raw material powder and the silicic acid raw material powder is 100 parts by mass in terms of solid content, the slurry for forming the refractory molded body preferably contains 10 to 150 parts by mass of the wollastonite particles, And more preferably 16 to 111 parts by mass.

When the content ratio of the calcium silicate hydrate particles is within the above range, the handling properties after the dewatering treatment described later can be effectively improved, and the content of the wollastonite particles within the above range can effectively improve the machinability, The dimensional stability of the molded article can be improved.

In the fireproof molded article production method 2 of the present invention, the slurry for forming a refractory molded body may contain inorganic particles other than calcium silicate particles.

Examples of the inorganic particles other than the calcium silicate particles include silica particles, alumina particles, mullite particles, silicon carbide particles, silicon nitride particles, silicon aluminum oxynitride particles, zircon particles, magnesia particles, zirconia particles, (BN) particles, aluminum nitride (AlN) particles, titanium diboride (TiB ₂ ) particles, fly ash balloon particles, pearlite particles, vermiculite particles, calcium fluoride particles, magnesium fluoride particles, calcium oxide particles, Barium oxide particles, barium sulfate particles, and the like.

In the fireproof molded article production method 2 of the present invention, it is preferable that the slurry for forming an anti-fire-molded article contains the inorganic particles in place of or in addition to the wollastonite particles described above. In this case, Is added so as to be within the content range of the above-mentioned wollastonite particles. In consideration of machinability and dimensional stability, the ratio of the wollastonite particles to the total amount of the wollastonite particles and the inorganic particles is preferably large, and more preferably the wollastonite particles only.

In the fireproof molded article production method 2 of the present invention, when the refractory forming body slurry contains the raw material of the calcium silicate particles and the calcium silicate particles, the raw materials of the calcium silicate particles and the calcium silicate particles are all contained in the obtained refractory- And are contained as calcium silicate particles.

In the fireproof molded article production method 2 of the present invention, the refractory molded body slurry includes a bundle of inorganic fibrous aggregates formed by coating a surface with a resin having a glass transition temperature of 40 캜 or lower.

As the bundle-shaped inorganic fiber aggregate, those described above can be mentioned. As described above, the production method 2 of the refractory formed product of the present invention is particularly preferably applicable to the production of the refractory product 2 of the present invention. In the case of producing the refractory product 2 of the present invention, As described above, the aggregate preferably has a length of 3 to 200 mm, more preferably 10 to 120 mm, and further preferably 20 to 80 mm.

When the length of the bundled inorganic fiber aggregate is within the above range, the bundled inorganic fiber aggregate can be suitably dispersed in the obtained refractory molded article 2, and the bundled inorganic fiber aggregate is hardly released, It becomes easy to improve.

Since the refractory forming body slurry used in Production Method 2 of the refractory molded product of the present invention is generally higher in fluidity than the refractory forming material used in Production Method 1 of the refractory molded product of the present invention, Longer lengths can be used.

The resin to be coated on the surface of the bundle-shaped inorganic fiber aggregate is not particularly limited as long as it is a resin having a glass transition temperature of 40 DEG C or lower. Examples thereof include acrylonitrile / butadiene copolymer latex, styrene / butadiene copolymer latex, A combination latex, a polystyrene, a polyethylene terephthalate, a polycarbonate, and the like.

The amount of the resin to be coated on the surface of the bundle-shaped inorganic fiber aggregate is preferably 1 to 30 parts by mass, more preferably 1 to 20 parts by mass, and more preferably 3 to 15 parts by mass relative to 100 parts by mass of the bundled inorganic fiber aggregate More preferably 5 to 15 parts by mass.

When the amount of the resin coated on the surface of the inorganic fiber aggregate in the form of a bundle is less than 1 part by mass with respect to 100 parts by mass of the inorganic fiber aggregate in the bundle form, the aggregation of the inorganic fiber aggregates in the preparation of the slurry for forming an anti- If the amount exceeds 30 parts by mass, pores are generated around the inorganic fiber aggregate by the drying treatment and the firing treatment to be described later, and the aggregation of the inorganic fiber tends to be detached, and the toughness of the obtained refractory molded article is likely to decrease.

The coating of the resin on the bundled inorganic fiber aggregate can be carried out, for example, by impregnation or spraying.

In the fireproof molded article production method 2 of the present invention, the refractory forming body slurry contains a resin having a glass transition temperature of 40 占 폚 or lower relative to 100 parts by mass of the raw material of the inorganic particles (when converted into solid content) More preferably 2 to 20 parts by mass, and more preferably 2 to 13 parts by mass, per 100 parts by mass of the inorganic fiber aggregate.

In the fireproof molded article production method 2 of the present invention, when the fire-resistant molded article is formed by coating a resin having a glass transition temperature of 40 DEG C or less on the surface thereof, Sufficient toughness can be imparted.

In the fireproof molded article production method 2 of the present invention, the refractory molded body slurry may further contain carbon fiber, pulp, rayon, polyester fiber, alkali-resistant glass fiber, or the like as a fiber component.

The content of the fiber component in the slurry for forming a refractory molded body is preferably 5% by mass or less in terms of solid content.

In the present application document, the fiber component means a staple fiber which is distinguished from the bundle-like inorganic fiber aggregate and added to secure moldability. In Production Method 2 of the refractory molded product of the present invention, Since the slurry for forming a refractory formed body contains a fiber component, the moldability at the time of dewatering, which will be described later, can be improved.

In the fireproof molded article production method 2 of the present invention, the refractory molded body-forming slurry may further include a binder. Examples of the binder include those described above. The content of the fiber component in the slurry for forming a refractory molded article is preferably less than 1% by mass in terms of solid content, and it is preferable that the binder component does not contain a binder as much as possible.

The inclusion of the binder in the refractory-forming body-forming slurry facilitates bonding of the inorganic particles and the like sufficiently to give sufficient strength to the resulting refractory. In the refractory molded article production method 2 of the present invention, however, And the thermal conductivity of the resulting refractory molded product can be effectively reduced when the binder is not included.

In Production Method 2 of the refractory molded article of the present invention, as the solvent constituting the slurry for forming an anti-fire-molded article, water or water containing a small amount of a hydrophilic organic solvent as a main component may be mentioned.

In Production Method 2 of the refractory molded article of the present invention, the method for preparing the refractory molded body-forming slurry is not particularly limited. For example, with respect to a water solvent, a coating liquid containing a lime raw material powder and a silicic acid raw material powder, a genitolite slurry (a slurry containing a genetite particle), a wollastonite particle and a resin having a glass transition temperature of 40 DEG C or lower is coated And adding the fiber components according to the desirability and sufficiently stirring the fibers can be prepared.

In Production Method 2 of the refractory molded article of the present invention, the refractory formed body slurry is dewatered.

In the method for producing an refractory molded article of the present invention, the slurry may contain a medium other than water as a liquid medium, but in the present application document, the case of removing a liquid medium other than water is also referred to as dehydration.

The dewatering can be carried out, for example, by a suction dewatering method, a pressure dewatering method, or a suction pressure dewatering method in which the slurry is poured into a molding die provided with a net at the bottom and the liquid medium such as water is sucked.

In the production method 2 of the refractory molded article of the present invention, a pump or the like may be used to transport the slurry to a molding die or the like, or a molding die may be disposed below a tank containing the slurry, As shown in FIG.

The dewatered product is suitably shaped so as to be superior to the refractory molded article to be obtained, and examples thereof include a cylindrical shape, a bottomed cylindrical shape, a board shape, and a block shape.

The dewaxing is carried out in such a manner that the volume density of the refractory molded product after the drying treatment described later is preferably 0.2 to 2.0 g / cm 3, more preferably 0.5 to 1.5 g / cm 3, and still more preferably 0.6 to 1.0 g / It is appropriate to perform the adjustment while adjusting the pressing force or the like.

In the method 2 of the refractory molded article of the present invention, the dehydrated water obtained by dehydrating the slurry is subjected to hydrothermal treatment.

The water heat treatment is preferably carried out in a steam atmosphere after the dehydrated product is transferred into an autoclave.

The hydrothermal treatment conditions are preferably carried out under the condition that the desired calcium silicate particles can be obtained from the raw material of the calcium silicate particles, preferably under a water vapor pressure of 7 kg / cm 2 or more and preferably under a water vapor pressure of 14 kg / And more preferably at a water vapor pressure of 17 kg / cm 2 or more.

The hydrothermal treatment time is not particularly limited, and can be appropriately selected depending on the kind of calcium silicate particles to be obtained and the water vapor pressure at the time of hydrothermal treatment. For example, when the lime raw material powder and the silicic acid raw material powder are hydrothermally treated at a water vapor pressure of 14 kg / cm 2 or more to obtain xinitellite particles, the hydrothermal treatment time is suitably 5 to 48 hours.

The heat treatment temperature is not particularly limited, and can be appropriately selected depending on the kind of the calcium silicate particles to be obtained, water vapor pressure at the heat treatment, water heat treatment time, and the like.

The hydrothermal treatment may cause the lime raw material powder as a raw material and the silicate raw material powder to react, for example, to produce genotitrite particles as calcium silicate particles.

In the method 2 of the refractory molded article of the present invention, the hydration-treated water subjected to the hydration treatment is subjected to a drying treatment.

The drying treatment temperature is preferably 50 to 300 占 폚, more preferably 100 to 200 占 폚.

The drying treatment time is preferably 1 to 24 hours. The drying treatment atmosphere is preferably atmospheric.

The production method 2 of the refractory molded article of the present invention is suitable as a method of producing the refractory molded article 2 of the present invention.

As described above, when a fire-resistant molded article is to be produced by kneading inorganic particles and inorganic fibers, aggregates of inorganic fibers are fibrillated with individual inorganic fibers at the time of kneading, dispersed and significantly reduced in fluidity, Only a very small amount of inorganic fibers could be added to the molded article. In order to solve this technical problem, the inventors of the present invention have conducted intensive studies and, as a result, have surprisingly found that, in addition to a raw material of calcium silicate particles as a raw material of inorganic particles, A slurry for forming a refractory formed body containing an inorganic fiber aggregate is dewatered and then subjected to a hydrothermal treatment followed by a drying treatment so that a large amount of the inorganic fiber aggregate can be contained in the resulting fire- And to complete the present invention.

According to Production Method 2 of the refractory molded product of the present invention, the flame-resistant slurry for forming the refractory formed body containing the raw material of calcium silicate particles is dewatered in the coexistence of a bundle of inorganic fiber aggregates formed by covering the surface with a resin having a glass transition temperature of 40 deg. The calcium silicate particles can be synthesized and the refractory formed body can be formed at the same time by dispersing the inorganic fibrous aggregate in the form of a bundle by the hydrothermal treatment. Thus, in the formation of the refractory, Dispersion can be suppressed, and even when a large amount of the inorganic fiber aggregate is used, the refractory molded article can be easily manufactured with high productivity.

The refractory molded article of the present invention can be suitably produced by the refractory molded article manufacturing method of the present invention.

Specifically, the refractory 1 of the present invention can be suitably produced by the refractory 1 of the present invention, and the refractory 2 of the present invention can be suitably produced by the refractory 2 of the present invention.

In the case where the fire-resistant molded article of the present invention comprises inorganic particles and a bundle of inorganic fibrous aggregates and does not contain a binder, for example, in Production Method 1 of the fire-resistant molded article of the present invention, A refractory forming material containing no binder may be prepared and then molded by an injection molding (slip casting) method.

The injection molding (slip casting) method is a method in which a refractory molded body-forming material adjusted to a suitable viscosity by using a solvent is poured into a molding die made of a porous material and the solvent is absorbed into a molding die, , According to this method, the refractory-molded body-forming material is densely packed in a molding die, so that even if the refractory-molded body-forming material does not contain a binder, a high-density refractory molded body can be produced.

(A molten metal holding member for metal casting)

Next, the metal casting member of the present invention will be described.

The metal casting member of the present invention is a metal casting member that is made of a refractory formed of inorganic particles and a bundle of inorganic fibrous aggregates and having an internal structure in which the bundled inorganic fibrous aggregate is dispersed among the inorganic particles, And a surface is formed.

The metal casting member of the present invention is a member used for a portion in contact with the molten metal in the metal casting apparatus, specifically, a metal casting molten metal holding member or a metal casting apparatus constituting member. Examples of the molten metal holding member for metal casting include a ladle, a trough, a molten metal retainer, and the like, and examples of the metal casting device constituting member include a float, a spout, and a hot top ring header.

The metal casting member of the present invention is similar to the refractory formed product of the present invention except that the shape of the metal casting member is limited to that formed by molding the member for metal casting. Specific examples of the inorganic fiber aggregate and the like, the content ratio thereof and the obtained physical properties are the same as those of the refractory molded article of the present invention.

The method for producing the metal casting member of the present invention is also the same as the method 1 of the refractory molded article of the present invention or the refractory molded article 2 of the present invention except that the shape of the product is limited to the shape of the metal casting member, Molding the above-described refractory forming body-forming material into a molding die having a desired molding surface shape, or dewatering the slurry for forming an above-described refractory molded body, subjecting it to hydrothermal treatment, and then drying it.

The metal casting member of the present invention may be such that the refractory internal material made of the refractory of the present invention is formed on the surface of the metallic casing.

When the refractory inner material is formed on the surface of the metal casing, it can be formed, for example, by adhering an inner material of a thin plate-like refractory molding system formed in a predetermined size to the surface of the metal casing.

The interior material to be attached to the surface of the metallic casing can be produced by the same method as the production method 1 of the refractory molded article of the present invention or the refractory molded article production method 2 of the present invention except that the shape thereof is specified by the shape of a thin plate or the like.

The metal casting member of the present invention can be produced by adhering the above-mentioned inner material to the surface of a metal casing by appropriately using mortar or the like.

In the case where the refractory internal material is formed on the surface of the metallic casing, a kneaded material of the refractory mold-forming material is produced by the same method as the method 1 of the refractory formed product of the present invention, The metal casting member of the present invention may be manufactured by appropriately drying and firing the same in the same manner as in Method 1 of the fire-resistant molded article of the present invention.

The shape of the metal casing may be any shape corresponding to the shape of the metal casting member such as a metal casting metal holding casting member to be obtained. For example, when the metal casting member to be obtained is taken, It is preferable to use an interior material having a thickness of 50 to 200 mm for a metal casing having a thickness of 2 to 10 mm.

For example, in the case where the metal casting member is a ladle, the ladle includes an open vessel shape having an inlet and a main outlet together with a bottom portion and a side wall, and having an opening at an upper portion, Molded articles of the present invention, and those having an interior material formed by the fire-resistant molded article of the present invention on all or a part of the inner surface of the open container.

In the case of taking a metal casting member as an example, the take-out includes a bottomed cylindrical pot body having an inlet for the molten metal and a main outlet, and an openable and closable upper cover And an openable and closable fluid lid capable of sealing the main outlet of the molten metal, wherein the pot body, the injection port and the main outlet are entirely formed by the refractory molded article of the present invention, A part of which has an interior material formed by the refractory molded article of the present invention.

In the case where the metal casting member of the present invention is a metal casting molten metal holding member, it may be provided with a supporting metal fitting as necessary. By having the supporting metal fitting, it is possible to easily mount the metal casting member on other casting apparatus constituting members such as a robot arm .

For example, when the kneaded material of the above-mentioned refractory forming material is poured into a molding die to form a molten metal holding casting member for metal casting, the supporting metal fitting can be integrated with the main body portion by being disposed at a desired position in advance. It is also possible to form the support bracket integrally with the metal casing in advance and to attach the bracket by exposing the support bracket portion while covering the surface of the interior of the metallic casing with the interior.

According to the present invention, it is possible to provide a metal casting member having reduced thermal conductivity and improved durability against physical impact and thermal shock.

EXAMPLES Next, the present invention will be described more specifically by way of examples, but these are for illustrative purposes only and do not limit the present invention.

(Example 1)

As shown in Table 1, 30.0 parts by mass of high alumina cement was contained as the binder, 40.0 parts by mass of silica and 30.0 parts by mass of silica were contained as inorganic particles, and a resin having a glass transition temperature of 40 占 폚 or less Coated on a surface of a bundle of glass fiber aggregates having a diameter of 1 mm and a length of 10 mm obtained by cutting glass fiber continuous strands of an acrylonitrile-butadiene copolymer latex-coated glass fiber cutting strand , And 2.2 parts by mass of a resin composition obtained by coating 10 parts by mass of an acrylonitrile-butadiene copolymer latex resin having a glass transition temperature of -31 占 폚 with respect to 100 parts by mass of the bundle-like glass fiber aggregate) It was taken and charged in a kneader. Next, 15 parts by mass of water was added to 100 parts by mass of the solid component (the cement, the inorganic particles and the bundle of inorganic fibers formed by covering the resin) of the refractory mold-forming material, and kneaded for 10 minutes to knead I made water.

The tap flow value of the obtained kneaded product was measured in accordance with JIS R 5201 and found to be 175 mm.

The kneaded product was poured into a molding die having a form corresponding to a ladle shape and having a supporting member placed thereon. The molded product was dried at 105 DEG C for 24 hours and further calcined at 700 DEG C for 3 hours, A ladle 1 having a supporting member having an inner volume of 6L and a thickness of 1 cm at the thinnest portion as shown in Fig. The resulting ladle 1 was made up of the ladle main body 2 and the support member 3, and voids such as blowholes and voids were not observed. The composition of the refractory molded article constituting the obtained ladle is shown in Table 2.

2, the kneaded material was coated on the metal casing 5 having a shape corresponding to the shape of the drawn shape so as to have a thickness of 50 mm and dried at 105 ° C for 24 hours (Shown by a hatched line in the drawing) by baking at 700 DEG C for 3 hours to form a refractory innerliner 6, and the outerliner 4 was produced. No pores such as blowholes or voids were observed in the obtained pores.

The kneaded product was charged into a box-shaped molding die, dried at 105 DEG C for 24 hours, and then fired at 700 DEG C for 3 hours to obtain a square pillar-shaped molding. The bulk density of the molded product was measured according to JIS R 1662 The Charpy impact value at the time of measurement was measured. The bulk density was 1.6 g / cm 3 and the Charpy impact value was 1.1 mJ / mm 2. As shown in Fig. 3, a bundle of inorganic fibrous aggregates (b) (among aggregates composed of inorganic particles (a)) between cement-bonded inorganic particles (a) It was confirmed that they were uniformly dispersed.

(Examples 2 to 7)

Except that the mixing ratio of the cement, the inorganic particles, and the bundle-like inorganic fiber aggregate formed by coating the surface with a resin having a glass transition temperature of 40 캜 or less was changed as shown in Table 1, I made ragged laces. No pores such as a blowhole or a void were observed in each ladle obtained. The composition of the refractory molded article constituting the obtained ladle is shown in Table 2.

The tap flow value was measured in the same manner as in Example 1 by using the kneaded materials obtained in the respective Examples. The results are shown in Table 1. Using the kneaded product, a rectangular pillar-shaped molded article was produced in the same manner as in Example 1, and the bulk density and Charpy impact value of each molded article were measured in the same manner as in Example 1. The results are shown in Table 2. Observation of the fracture cross section of each of the above molded products revealed that all of the bundle-shaped inorganic fiber aggregates were uniformly dispersed among the inorganic particles bonded with cement.

(Comparative Example 1)

As shown in Table 3, in place of the acrylonitrile-butadiene copolymer latex-coated glass fiber cut strand, a glass fiber cut strand which was not coated with resin (a glass fiber cut strand having a diameter of 1 mm and a length of 10 mm In the same manner as in Example 1 except that a glass fiber aggregate having a bundle shape of a bundle of glass fibers was used. It was confirmed that pores having a diameter of 2 cm or more were produced in the obtained ladle. The composition of the refractory molded article constituting the obtained ladle is shown in Table 4.

The tap flow value was measured in the same manner as in Example 1 by using the kneaded material used for the production of the ladles. The results are shown in Table 3. Using the kneaded material, a rectangular pillar-shaped molding was produced in the same manner as in Example 1, and the bulk density of the molding was measured in the same manner as in Example 1. The results are shown in Table 4. When the fractured surface of the molded product was visually observed, it was confirmed that the bundle of glass fiber aggregates was fibrillated and individual glass fibers were dispersed among the inorganic particles.

(Comparative Example 2 to Comparative Example 4)

The laminates with the supporting members were prepared in the same manner as in Comparative Example 1 except that the blending ratios of cement, inorganic particles, and glass fiber cutting strands not coated with resin were changed as shown in Table 3. However, It was impossible to mold them all.

(Examples 8 to 9)

As shown in Table 5, instead of the acrylonitrile-butadiene copolymer latex-coated glass fiber cutting strand, a multilayered inorganic fiber aggregate having a surface coated with a resin having a glass transition temperature of 40 占 폚 or less was coated with acrylonitrile Butadiene copolymer latex-coated silica fiber cut strand (100 parts by mass of a bundle of silica fiber aggregates having a diameter of 1 mm and a length of 10 mm, obtained by cutting the mixed silica continuous fibers, And 10 parts by mass of an acrylonitrile-butadiene copolymer latex having a transition temperature of -31 占 폚), cement, inorganic particles, and a resin having a glass transition temperature of 40 占 폚 or less Except that the mixing ratio of the fibrous aggregates was changed as shown in Table 5, To produce lasers with supporting members. No pores such as a blowhole or a void were observed in each ladle obtained. Table 6 shows the composition of the refractory molded article constituting the obtained ladle.

The tap flow value was measured in the same manner as in Example 1 by using the kneaded materials obtained in the respective Examples. The results are shown in Table 5. Using the kneaded product, a rectangular pillar-shaped molded article was produced in the same manner as in Example 1, and the bulk density and Charpy impact value of each molded article were measured in the same manner as in Example 1. The results are shown in Table 6. Observation of the cross section of each of the above molded products revealed that the bundle of inorganic fiber aggregates was uniformly dispersed among the inorganic particles bonded with cement.

(Examples 10 to 11)

Butadiene copolymer latex-coated glass fiber cutting strand in which an acrylonitrile / butadiene copolymer latex-coated latex-coated latex-coated latex-coated latex-coated alumina fiber (100 parts by mass of the bundle-shaped alumina fiber aggregate) of the bundled alumina fiber aggregate having a diameter of 1 mm and a length of 10 mm obtained by cutting the mixed strand of alumina fibers A mixture of cement, inorganic particles and a resin having a glass transition temperature of 40 DEG C or less is coated on the surface of the inorganic fiber aggregate, 5, except that the support member was changed in the same manner as in Example 1 It has produced a lean-ray. No pores such as a blowhole or a void were observed in each ladle obtained. Table 6 shows the composition of the refractory molded article constituting the obtained ladle.

The tap flow value was measured in the same manner as in Example 1 by using the kneaded materials obtained in the respective Examples. The results are shown in Table 5. Using the kneaded product, a rectangular pillar-shaped molded article was produced in the same manner as in Example 1, and the bulk density and Charpy impact value of each molded article were measured in the same manner as in Example 1. The results are shown in Table 6. As a result of observing the fracture surfaces of each of the above-mentioned molded products, it was confirmed that the bundle-like inorganic fiber aggregates were uniformly dispersed among the inorganic particles bonded with cement.

(Example 12)

A multilayer inorganic fiber aggregate having a surface coated with a resin having a glass transition temperature of 40 占 폚 or less, wherein a mixed resin coating of an acrylonitrile-butadiene copolymer latex and polystyrene is used instead of an acrylic resin- On the surface of a bundle of glass fiber aggregates having a diameter of 1 mm and a length of 10 mm obtained by cutting the mixed glass continuous fibers, 100 parts by mass of acrylonitrile having a glass transition temperature of -31 占 폚 · 10 parts by mass of a mixed resin of a butadiene copolymer latex and polystyrene (amount of acrylonitrile · butadiene copolymer latex: polystyrene resin amount = 7: 3 by mass ratio)) was used, and cement and inorganic particles And a multilayered inorganic fiber web having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower Lanes having supporting members were produced in the same manner as in Example 1, except that the blend ratio of the blend was changed as shown in Table 7. [ No pores such as a blowhole or a void were observed in the obtained ladle. Table 8 shows the composition of the refractory molded article constituting the obtained ladle.

The tap flow value was measured in the same manner as in Example 1 by using the kneaded material obtained in the above Production Example. The results are shown in Table 7. The kneaded material was used in the same manner as in Example 1 to prepare a square pillar-shaped molding, and the bulk density and the Charpy impact value of the molding were measured in the same manner as in Example 1. The results are shown in Table 8. Observation of the fracture surface of the molded product revealed that the bundle of inorganic fiber aggregates was uniformly dispersed among the inorganic particles bonded with cement.

(Comparative Example 5)

Acrylonitrile-butadiene copolymer latex coated Instead of the glass fiber cut strand, 100 parts by mass of a bundle of glass fiber aggregates having a diameter of 1 mm and a length of 10 mm, obtained by cutting the mixed glass continuous fibers, Except that the blend ratio of cement, inorganic particles, and polystyrene-coated glass fiber-cutting strands was changed as shown in Table 7 , It was attempted to manufacture the ladle bearing the supporting member in the same manner as in Example 1, but the fluidity of the raw material kneaded product was low and could not be molded.

(Examples 13 to 18)

As the binder, aluminum phosphate having a solid content concentration of 95% by mass was used in place of high alumina cement, and the aluminum phosphate, the inorganic particles, and the resin having a glass transition temperature of 40 캜 or less were coated, Lanes having supporting members were produced in the same manner as in Example 1 except that the mixing ratio of the fibrous aggregates was changed as shown in Table 9. [ No pores such as a blowhole or a void were observed in each ladle obtained. The composition of the refractory molded article constituting the obtained ladle is shown in Table 10.

Further, tap flow values were measured in the same manner as in Example 1 using the kneaded materials obtained in the respective Examples, and all the values were 150 or more. Using the kneaded product, a rectangular pillar-shaped molded article was produced in the same manner as in Example 1, and the bulk density and Charpy impact value of each molded article were measured in the same manner as in Example 1. The results are shown in Table 10. Observation of the fracture cross section of each of the above molded products revealed that all of the bundle-shaped inorganic fiber aggregates were uniformly dispersed among the inorganic particles bonded with the binder.

From Tables 1 to 2 and Tables 5 to 10, it can be seen that the ladles and the laps obtained in Examples 1 to 18 have high homogeneity because no blowholes or voids are formed in the refractory formed body, It is understood that the bundle-shaped inorganic fibrous aggregates are uniformly dispersed in a large amount, the thermal conductivity is low, and the toughness is high.

In Examples 1 to 18, since the bundle of inorganic fiber aggregates in which the surface is coated with a resin having a glass transition temperature of 40 DEG C or lower is used as the inorganic fiber material, It is possible to suppress the fibrillation of the fibrous aggregate and to easily manufacture the refractory molded article containing a large amount of the inorganic fibrous aggregate under high productivity.

On the other hand, from Tables 3 to 4, since the ladles obtained in Comparative Example 1 use a bundle of inorganic fibrous aggregates that are not coated with a resin as the inorganic fiber material, It can be seen that only a low uniformity of the formed film can be obtained.

It should be noted from Tables 3 to 4 and Tables 7 to 8 that in Comparative Examples 2 to 5, as the inorganic fiber material, a resin having no surface coated with a resin or having a glass transition temperature of 40 Lt; 0 > C, the fluidity at the time of molding deteriorates and molding can not be performed.

(Example 19)

As shown in Table 11, with respect to 800 parts by mass of water, 25 parts by mass of the quicklime powder and 25 parts by mass of the silicate powder as raw materials of the calcium silicate particles serving as the inorganic particles and the calcium silicate particles 10 mass parts in terms of solid content of the notaritol slurry, 40 mass parts of wollastonite particles (NYARD-G, manufactured by American Interface Company), and a surface coated with a resin having a glass transition temperature of 40 占 폚 or less, as acrylonitrile -Butadiene copolymer latex-coated glass fiber cutting strand (E glass fiber roving (fineness 270 tex) was cut on the surface of a bundle of glass fiber aggregates having a fineness of 270 tex, a diameter of 0.5 mm and a length of 50 mm, And 10 parts by mass of an acrylonitrile-butadiene copolymer latex resin having a glass transition temperature of -31 DEG C with respect to 100 parts by mass of the fibrous aggregate) Parts of mixture, and further, the alkali resistance of glass fibers to be mixed thoroughly (Japan Electric Glass Co., Ltd. agent) 3 parts by weight to prepare a slurry for forming refractory shaped article.

The slurry for forming the refractory forming body was dewatered and pressed to form a flat plate and then hydrothermally cured in an autoclave under a pressurized steam atmosphere at 205 DEG C and a pressure of 17 kg / cm2 for 48 hours, followed by drying at 125 DEG C for 15 hours To obtain a plate-like fire-resistant molded article (dried body) having a length of 200 mm, a width of 200 mm, a thickness of 30 mm and a bulk density of 0.85 g / cm3. The composition of the obtained refractory molded product is shown in Table 12. Voids such as blowholes and voids were not observed in the refractory molded article.

X-ray diffractometry of the obtained refractory product revealed that the refractory product contained calcium silicate particles in which calcium lime and silica were reacted as inorganic particles and that the calcium silicate particles were substantially genetite particles.

The bending strength of the resulting refractory molded product was measured according to JIS A 1408, and found to be 8.0 MPa. The Charpy impact value of the obtained refractory product was measured in accordance with JIS R 1662, and found to be 1.5 mJ / mm 2. The results are shown in Table 12.

As shown in Fig. 4, the fractured surface of the above refractory molded product was observed. As shown in Fig. 4, the inorganic fibrous aggregates (b) (in the aggregates composed of calcium silicate (a) ) Were uniformly dispersed.

The sintered body obtained had a bulk density of 0.85 g / cm 3 and a flexural strength of 8.0 MPa as measured in accordance with JIS A 1408, and the sintered body obtained was sintered at 500 캜 for 12 hours under the conditions specified in IS R 1662 The Charpy impact value measured according to this was 1.2 mJ / mm 2. The results are shown in Table 12.

(Examples 20 to 22)

A flame-retardant fire-proof molded article (dried body) was produced in the same manner as in Example 19, except that the blending amount of the bundle-shaped inorganic fiber aggregate obtained by coating the surface with a resin having a glass transition temperature of 40 캜 or less was changed as shown in Table 11 . Voids such as blowholes and voids were not observed in each of the obtained refractory molded bodies. When the broken sections of the respective molded products were visually observed, it was confirmed that all the inorganic fibrous aggregates in the form of bundles were uniformly dispersed among the calcium silicate particles.

Table 12 shows the composition and the bulk density of the obtained fire-resistant molded article. The flexural strength and the Charpy impact value of each of the obtained refractory products were measured in the same manner as in Example 19. The results are shown in Table 12.

Further, the bulk density, bending strength and Charpy impact value of the fired body obtained by firing each of the above-described refractory molded bodies at 500 캜 for 12 hours were measured as in Example 19. The results are shown in Table 12.

(Comparative Example 6)

As shown in Table 13, instead of 3 parts by weight of the bundle-like inorganic fiber aggregate having a surface coated with a resin having a glass transition temperature of 40 占 폚 or less, a bundle of carbon fiber cutting strands (Dried product) was produced in the same manner as in Example 19, except that 3 parts by mass of a polypropylene resin (trade name, manufactured by TENAX Co., Ltd., length 6 mm) was used. Table 14 shows the composition and the bulk density of the obtained refractory molded article. Observation of the fracture profile of the obtained refractory molded body revealed that the bundle-shaped carbon fibers were carded. The flexural strength and the Charpy impact value of each of the obtained refractory products were measured in the same manner as in Example 19. Table 14 shows the results.

Further, the bending strength and the Charpy impact value of the fired body obtained by firing the above fire-resistant molded article at 500 ° C for 12 hours were measured as in Example 19. Table 14 shows the results.

(Comparative Examples 7 to 10)

A bundle of inorganic fiber aggregates (E glass continuous fibers (two pairs of 135 tex, twisted together) having no resin coating on the surface were prepared in the same manner as in Example 1, A bundle of glass fiber aggregates having a fineness of 270 tex, a diameter of 0.5 mm, and a length of 50 mm, obtained by cutting the fiber bundles in a state in which they were mixed together and having a fineness of 270 tex and a number of twists per 25 mm of 4.4) (Dried body) was produced in the same manner as in Example 19, except that the blending amount of the inorganic fiber aggregate in the shape of a flat plate was changed as shown in Table 13.

In the comparative example 7, when the fractured surface of the obtained refractory molded product was visually observed, it was confirmed that the bundled inorganic fiber aggregate was carded. In Comparative Examples 8 to 10, the bundle of inorganic fibrous aggregates was opened to increase the viscosity of the refractory forming slurry, resulting in deterioration of the formability, and voids such as blowholes and voids were generated in the molded articles, It was impossible to obtain a molded article.

The composition and the bulk density of the obtained refractory molded product are shown in Table 14. The bending strength and the Charpy impact value of each of the refractory molded articles obtained in Comparative Example 7 were measured as in Example 19. Table 14 shows the results. Further, the bulk density, bending strength and Charpy impact value of the sintered body obtained by firing the fire-proof body obtained in Comparative Example 7 at 500 ° C for 12 hours were measured as in Example 19. [ Table 14 shows the results.

(Examples 23 to 24)

As shown in Table 15, the lengths of the bundle-shaped inorganic fiber aggregates formed by covering the surface with a resin having a glass transition temperature of 40 占 폚 or less were changed to 10 mm (Example 23) and 120 mm (Example 24), respectively Except for this, a flame-retarded fire-proof molded article (dried body) was produced in the same manner as in Example 20. Voids such as blowholes and voids were not observed in each of the obtained refractory molded bodies. When the broken sections of the respective molded products were visually observed, it was confirmed that all the inorganic fibrous aggregates in the form of bundles were uniformly dispersed among the calcium silicate particles.

Table 16 shows the composition and the bulk density of the obtained refractory molded article. The Charpy impact value of each of the obtained refractory products was measured in the same manner as in Example 19. The results are shown in Table 16.

The bulk density and the Charpy impact value of the sintered body obtained by firing each of the above-described refractory-formed bodies at 500 캜 for 12 hours were measured as in Example 19. The results are shown in Table 16.

(Examples 25 to 27)

As shown in Table 17, a bundle of inorganic fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower was used. In Example 25, an alkali glass continuous fiber (alkali glass fiber roving (Japanese electric glass (270 tex, fineness of 270 tex), 270 tex in a fineness and 50 mm in length, and in Example 26, a glass fiber composite yarn (twisted two E fiberglass yarns of 135 tex) , A fineness of 270 tex, and a twist number per 25 mm of 4.4) was cut, and a bundle of inorganic fiber aggregates having a fineness of 270 tex, a diameter of 0.5 mm and a length of 50 mm was used. In Example 27, A bundle shape having a fineness of 270 tex and a length of 50 mm obtained by cutting a combined yarn (two twisted alkali glass fiber yarns of 135 tex are twisted together and having a fineness of 270 tex and a twist number per 25 mm of 4.4) (Dried body) was produced in the same manner as in Example 20 except that the fibrous aggregate was used. [0251] No pores such as a blowhole or void were observed in each of the obtained fire-proof molded bodies. Observation of the cross-section was observed, and it was confirmed that all the inorganic fibrous aggregates in a bundle shape were uniformly dispersed among the calcium silicate particles.

The composition and the bulk density of the obtained refractory molded product are shown in Table 18. The Charpy impact value of each of the obtained refractory products was measured in the same manner as in Example 19. The results are shown in Table 18.

The bulk density and the Charpy impact value of the sintered body obtained by firing each of the above-described refractory-formed bodies at 500 캜 for 12 hours were measured as in Example 19. The results are shown in Table 18.

From Tables 11 to 12 and Tables 15 to 18, it can be seen that the fire-proof molded bodies (dried bodies and fired bodies) obtained in Examples 19 to 27 have high homogeneity because no blowholes or voids are formed, It is also understood that the bundle-shaped inorganic fibrous aggregates are uniformly dispersed in a large amount, have low thermal conductivity, and have high bending strength and impact resistance.

In Examples 19 to 27, since the bundle of inorganic fiber aggregates in which the surface is coated with a resin having a glass transition temperature of 40 占 폚 or less is used as the inorganic fiber material, It is possible to suppress the fibrillation of the fibrous aggregate and to easily manufacture the refractory molded article containing a large amount of the inorganic fibrous aggregate under high productivity.

On the other hand, from the Tables 13 to 14, it was confirmed that the fire-resistant molded article obtained in Comparative Example 6 had a surface with a glass transition temperature of 40 占 폚 or lower Shaped carbon fiber cutting strands which are not coated with a resin. Therefore, not only the multiple-shaped carbon fibers are opened at the time of forming the refractory molded body but also the carbon fibers are lost when the sintered body is heated at 500 ° C, It can be understood that the impact resistance is lowered. In addition, since the fire-resistant molded articles obtained in Comparative Examples 7 to 10 use a bundle of inorganic fiber aggregates whose surfaces are not coated with a resin having a glass transition temperature of 40 DEG C or lower, (Comparative Example 7), the fluidity of the slurry for forming an anti-fire-molded body was lowered and the formability was lowered, and a uniform molded article could not be obtained (Comparative Examples 8 to 9) Comparative Example 10).

(Industrial availability)

According to the present invention, there is provided a novel fire-resistant molded article having low thermal conductivity, high homogeneity, high durability against physical impact and thermal shock, and a method of easily producing the refractory molded article under high productivity, The molten metal retaining member can be provided.

1: ladle 2: ladle body part
3: support member 4: drilling
5: Metal casing 6: Refractory interior material

Claims (18)

Wherein the glass fiber aggregate comprises an inorganic particle and a bundle of glass fiber aggregates and has an internal structure in which the bundled glass fiber aggregate is dispersed among the inorganic particles. The method according to claim 1,
A fireproof molded article having an internal structure comprising a binder, inorganic particles, and a bundle of glass fiber aggregates, wherein the bundle of glass fiber aggregates is dispersed between the inorganic particles bonded by the binder. The method of claim 2,
1 to 50 mass% of the binder, 30 to 95 mass% of the inorganic particles, and 1 to 30 mass% of the bundled glass fiber aggregate. The method according to claim 2 or 3,
Wherein the bundle-shaped glass fiber aggregate has a diameter of 0.01 to 5 mm and a length of 3 to 30 mm. The method according to claim 1,
Wherein the inorganic particles include calcium silicate particles and a bundle of glass fiber aggregates and the bundle of glass fiber aggregates is dispersed among the calcium silicate particles. The method of claim 5,
65 to 99 mass% of the inorganic particles, and 1 to 30 mass parts of the bundled glass fiber aggregate. The method according to claim 5 or 6,
Wherein the bundled glass fiber aggregate has a diameter of 0.01 to 5 mm and a length of 3 to 200 mm. The method according to any one of claims 1 to 3 and claims 5 to 6,
And the Charpy impact value measured by JIS R 1662 is 0.5 to 10 mJ / mm 2. A method for producing an internal combustion engine, comprising kneading an inorganic particle and a refractory forming material-forming material comprising a bundle of glass fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower, and then kneading the obtained kneaded material Way. The method of claim 9,
A fire-resistant molded article comprising a binder, inorganic particles, and a bundle of glass fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower, is kneaded, and then the kneaded material obtained is molded Way. The method of claim 10,
Wherein the refractory mold-forming material comprises a bundle of glass fiber aggregates comprising a solid content of 1 to 50 mass% of the binder, 30 to 95 mass% of the inorganic particles, and a surface of the resin coated with a resin having a glass transition temperature of 40 캜 or less By mass to 1% by mass to 30% by mass. The method according to claim 10 or 11,
Wherein the tap flow value of the kneaded product measured by JIS R 5201 is not less than 150 mm. A slurry for forming an injection-molded body containing a raw material of calcium silicate particles and a bundle of glass fiber aggregates having a surface coated with a resin having a glass transition temperature of 40 DEG C or lower is dewatered and then subjected to hydrothermal treatment Followed by a drying treatment. 14. The method of claim 13,
Wherein the raw material of the calcium silicate particles is a lime raw material powder and a silicate raw material powder. 15. The method of claim 14,
Wherein said hydrothermal treatment is performed under a water vapor pressure of 7 kg / cm 2 or more. The method according to any one of claims 13 to 15,
The slurry for forming an injection molded article according to any one of claims 1 to 3, wherein the slurry for forming the refractory forming body contains 1 to 30 parts by mass of a bundle of glass fiber aggregates comprising a resin having a glass transition temperature of 40 DEG C or less coated on the surface thereof with respect to 100 parts by mass of the calcium silicate particles, By weight of the refractory. The method according to any one of claims 9 to 11 and claims 13 to 15,
A bundle of glass fiber aggregates obtained by coating a resin having a glass transition temperature of 40 DEG C or lower on the surface is coated with 1 to 30 parts by mass of a resin having a glass transition temperature of 40 DEG C or lower relative to 100 parts by mass of a bundle of glass fiber aggregates Wherein the refractory molded body is made of a thermoplastic resin. Characterized in that at least its surface is formed by an internal combustion engine having an internal structure in which inorganic glass particles and inorganic glass particles and inorganic glass particles and inorganic glass particles, Metal casting members.

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