Refractory material and production method therefor

Abstract

The present invention addresses the problem of providing a refractory material that does not crack or separate from a substrate even when heated to a high temperature and then rapidly cooled. The present invention is a refractory material comprising a mixture of: a liquid heat-resistant binder which contains at least silicate soda, potassium silicate, Snowtex, kibushi clay, and BESTONE; and a refractory powder which contains at least BESTONE, milk casein, and perlite.

Description

Fire-resistant material and method for manufacturing the same

[0001] This invention relates to a fire-resistant material and a method for manufacturing the same.

[0002] Conventionally, when industrial waste is incinerated in an incinerator, residues such as burnt ash and ashes remain and accumulate inside the furnace. Therefore, when a certain amount of residue is reached, it is scraped out of the furnace and transported by transport vehicles to a residue disposal site, ash recycling plant, etc., for final processing.

[0003] In that case, even if the furnace is stopped, the residue continues to burn, making it impossible to remove the residue from inside the furnace, thus significantly reducing the furnace's efficiency. Therefore, after stopping the furnace, water is sprayed onto the residue to extinguish the fire and increase the furnace's efficiency.

[0004] However, since furnace walls are formed from refractory bricks or by applying refractory castable material (amorphous refractory material) to a substrate such as insulation, if water sprayed towards the residue hits the furnace wall and the furnace wall cools rapidly, cracks may form in the refractory bricks or the refractory castable may peel off from the substrate, damaging the furnace wall.

[0005] Furthermore, in heat treatment furnaces and the like, once the heat treatment is complete and the door (hatch) is opened, cold air from outside enters the furnace, causing the furnace walls to cool rapidly. This can lead to cracks in the refractory bricks or detachment of the refractory castable from its base, resulting in damage to the furnace walls.

[0006] Therefore, a furnace has been provided in which foam is released into the furnace from a foaming device to extinguish the residue and prevent the furnace walls from cooling rapidly (see, for example, Patent Document 1).

[0007] Japanese Patent Publication No. 2017-219263

[0008] However, in the aforementioned furnace, not only is it necessary to install a foaming device facing the inside of the furnace to generate foam, but it is also necessary to mix foaming agent with water to form a foaming solution and supply it to the foaming device, which increases the cost of the furnace.

[0009] The present invention aims to solve the problems of conventional furnaces such as incinerators and heat treatment furnaces, and to provide a refractory material and a method for manufacturing the same that does not crack or peel off from the substrate even when heated to a high temperature and then rapidly cooled.

[0010] To that end, the refractory material of the present invention consists of a mixture of a liquid heat-resistant binder containing at least sodium silicate, potassium silicate, Snowtex, wood clay, and Beston, and a refractory powder containing at least Beston, milk casein, and perlite.

[0011] According to the present invention, the refractory material consists of a mixture of a liquid heat-resistant binder containing at least sodium silicate, potassium silicate, Snowtex, wood clay, and Beston, and a refractory powder containing at least Beston, milk casein, and perlite.

[0012] In this case, the heat-resistant binder contains at least sodium silicate, potassium silicate, Snowtex, wood-grain clay, and Beston, and the refractory powder contains at least Beston, milk casein, and perlite, resulting in a smaller expansion and contraction rate for the refractory material.

[0013] Therefore, even if it is heated to a high temperature and then rapidly cooled, it will not crack or peel off from the substrate.

[0014] This is a cross-sectional view of a main part showing an example of an incinerator using refractory material in the furnace wall according to the first embodiment of the present invention. This is a cross-sectional view of a main part showing an example of an incinerator using refractory material in the furnace wall according to the second embodiment of the present invention. This is a cross-sectional view showing an example of a heat treatment furnace using refractory material in the furnace wall according to the third embodiment of the present invention. This is a conceptual diagram of a heating device for demonstration testing to heat a test subject to a high temperature.

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0016] Figure 1 is a cross-sectional view of a main part showing an example of an incinerator in which a refractory material is used in the furnace wall according to the first embodiment of the present invention.

[0017] In the figure, 11 is an incinerator as a furnace, 12 is industrial waste as an object to be incinerated by the incinerator 11, 14 is a furnace wall, 18 is an incineration chamber as a furnace chamber surrounded and formed by the furnace wall 14, 21 is a fire grate as a hearth, Tx is a temperature sensor as a temperature detection part arranged at a predetermined position of the fire grate, and 25 is an air supply duct as an air supply device for supplying air to the incineration chamber 18. A burner (not shown) as a combustion device for burning the industrial waste 12 is arranged facing the incineration chamber 18.

[0018] Further, 31 is a water injection nozzle as a water injection device arranged facing the inside of the incineration chamber 18 and injecting water toward the residue. The water injection nozzle 31 is connected to a water storage tank 35 via a water supply pipe 33, and an on-off valve 37 as a water supply valve is arranged on the water supply pipe 33 so as to be freely opened and closed.

[0019] By the way, when incinerating the industrial waste 12 in the incinerator 11, combustion shells, ash, etc. remain and accumulate as residues in the incineration chamber 18. Therefore, the residues are scraped out from the incineration chamber 18 every time a certain amount is reached, and are transported by a transport vehicle to a disposal site for the residues, a recycling factory for ash, etc., and finally processed.

[0020] In that case, even if the incinerator 11 is stopped, if the residues keep flaming and the residues cannot be scraped out from the incineration chamber 18, the incineration efficiency of the incinerator 11 will be significantly reduced. Therefore, in the present embodiment, when the incinerator 11 is stopped, the on-off valve 37 is opened, and water is injected from the water injection nozzle 31 toward the residues.

[0021] Further, when the temperature of the residues on the fire grate 21 is detected by the temperature sensor Tx and reaches a temperature suitable for scraping out from the incineration chamber 18, the on-off valve 37 is closed, and the injection of water from the water injection nozzle 31 is stopped.

[0022] By the way, when the furnace wall 14 is formed of a conventional refractory brick, for example, a refractory brick with a refractoriness of SK-32 defined by JIS, if water hits the refractory brick and the refractory brick is rapidly cooled, cracks will occur in the refractory brick and the furnace wall 14 will be damaged.

[0023] Therefore, in the present embodiment, the furnace wall 14 is formed by a refractory brick layer 43 and a furnace cover 44 as an exterior body surrounding the outer surface of the refractory brick layer 43, and the refractory brick layer 43 is the refractory brick of the present invention that does not crack even when water splashes and it is rapidly cooled, that is, it is formed by laminating refractory bricks as the first refractory material.

[0024] Next, the manufacturing method of the refractory castable and refractory brick of the present invention will be described.

[0025] In the present embodiment, a refractory powder is kneaded with a liquid heat-resistant binder to produce a mortar-like refractory castable, the refractory castable is poured into a mold, pressurized with a required pressure, and then demolded, whereby a refractory brick with a small expansion / contraction rate is produced.

[0026] First, a method for producing a liquid heat-resistant binder by mixing and stirring a plurality of predetermined materials will be described.

[0027] For that purpose, sodium silicate (sodium silicate: Na ２ O·nSiO ２ ·KH ２ O n = 2.8 to 3.3) is 15 [parts by weight] or more and 35 [parts by weight] or less, potassium silicate (potassium silicate: K ２ O·nSiO ２ ·KH ２ O n = 1.9 to 3.7) is 10 [parts by weight] or more and 20 [parts by weight] or less, Snowtex is 2 [parts by weight] or more and 8 [parts by weight] or less, mineral colloid (Bengel 31) is 0.1 [parts by weight] or more and 0.4 [parts by weight] or less, water is 4.5 [parts by weight] or more and 8 [parts by weight] or less, kibushi clay is 0.5 [parts by weight] or more and 4.5 [parts by weight] or less, and Beston is 0.5 [parts by weight] or more and 4.5 [parts by weight] or less are prepared.

[0028] Among the above materials, sodium silicate, potassium silicate, Snowtex, mineral colloid, kibushi clay, and Beston are at least contained to reduce the expansion and contraction rate of the refractory bricks of the present invention. The mineral colloid is contained as an additive to further reduce the expansion and contraction rate of the refractory bricks of the present invention and is not used when manufacturing conventional refractory bricks.

[0029] The Snowtex is a mixture containing 30 [% by weight] of amorphous silica and 70 [% by weight] of water.

[0030] In addition, the mineral colloid contains 99 [% by weight] or more and 100 [% by weight] or less of bentonite and 0.1 [% by weight] or more and 1 [% by weight] of quartz (quartz), and is added to extremely reduce the expansion and contraction rate of refractory bricks.

[0031] Kibushi clay is produced from a lignite layer and contains a large amount of organic substances such as lignite, kibushi, and tree roots. Since the particles are fine and the mixing of quartz is small, it has high fire resistance.

[0032] Beston is a waterproof admixture for concrete and mortar, and consists of silicon dioxide SiO ２ aluminum oxide Al ２ O ３ iron oxide Fe ２ O ３ MgO, magnesium oxide MgO, calcium oxide CaO, etc.

[0033] Then, 15 [parts by weight] or more and 35 [parts by weight] or less of sodium silicate are put into the stirring tank, 10 [parts by weight] or more and 20 [parts by weight] or less of potassium silicate are put in while stirring, and 2 [parts by weight] or more and 8 [parts by weight] or less of Snowtex are put in while stirring.

[0034] Subsequently, 0.1 [parts by weight] or more and 0.4 [parts by weight] or less of the mineral colloid are gradually put into the stirring tank while stirring, and 4 [parts by weight] or more and 8 [parts by weight] or less of water are put in at once while stirring.

[0035] Then, once the mineral colloid spheres are gone, add 0.5 parts by weight or more and 4.5 parts by weight or less of Kibushi clay and 0.5 parts by weight or more and 4.5 parts by weight or less of Beston to the stirring tank, and continue stirring continuously for 2 hours or more.

[0036] In this way, a liquid heat-resistant binder is manufactured.

[0037] For example, using 25 parts by weight of sodium silicate, 15 parts by weight of potassium silicate, 5 parts by weight of Snowtex, 0.2 parts by weight of mineral colloid, 6 parts by weight of water, 1.5 parts by weight of wood clay, and 1.5 parts by weight of Beston, a heat-resistant binder of 54.2 parts by weight is produced, containing 46.12% by weight of sodium silicate, 27.67% by weight of potassium silicate, 9.23% by weight of Snowtex, 0.37% by weight of mineral colloid, 11.07% by weight of water, 2.77% by weight of wood clay, and 2.77% by weight of Beston.

[0038] Next, a method for producing refractory powder by mixing, stirring, and kneading several predetermined materials will be described.

[0039] To that end, the following are used: Portland cement in an amount of 3 parts by weight or more and 7 parts by weight or less; kaolin (hydrated aluminum silicate) in an amount of 1 part by weight or more and 4 parts by weight or less; Beston in an amount of 0.1 parts by weight or more and 2 parts by weight or less; and sodium carbonate (Na). ２ CO ３ (Soda ash) 0.05 parts by weight or more and 0.15 parts by weight or less, metholose (hydroxypropyl methylcellulose) 0.05 parts by weight or more and 0.15 parts by weight or less, milk casein (acid casein) 0.1 parts by weight or more and 2 parts by weight or less, perlite 1 part by weight or more and 5 parts by weight or less, aluminum oxide Al ２ O ３ Prepare 5 parts by weight or more and 20 parts by weight or less of the above, and 5 parts by weight or more and 20 parts by weight or less of the fire-resistant mortar.

[0040] Of the aforementioned materials, beston, milk casein, and perlite are included at least to reduce the expansion and contraction rates of the refractory brick of the present invention, and sodium carbonate and metholose are included as additives to further reduce the expansion and contraction rates of the refractory brick of the present invention, and are not used in the manufacture of conventional refractory bricks.

[0041] The aforementioned Portland cement is calcium silicate 3CaO·SiO ２ , 2CaO・SiO ２ Calcium aluminate 3CaO・Al ２ O ３ , Calcium iron aluminate 4CaO・Al ２ O ３ Fe ２ O ３ Clinker consisting of the above and calcium sulfate CaSO ４ ・2H ２ It is a mixture of gypsum, which is composed of oxygen.

[0042] Kaolin is silicon dioxide (SiO₂) ２ and aluminum oxide (Al) ２ O ３ It is a white, fine powder containing [a certain substance] and having a melting point of 1600°C or higher.

[0043] Also, sodium carbonate (Na) ２ CO ３、 Metroze is added to significantly reduce the expansion and contraction rates of refractory bricks.

[0044] Perlite is a granular material composed of obsidian, amorphous silica, crystalline silica, etc., with a particle size of 2 mm or more and 5 mm or less. Perlite can also be made from Portland cement, kaolin, beston, and sodium carbonate (Na). ２ CO ３ When a mixture of methylose and milk casein is used as a cement mixture, 30 parts by weight of aluminum oxide (Al) is used in the cement mixture. ２ O ３ Both the cement mixture and the mortar shall be measured in parts by weight obtained by adding the part by weight of perlite to the part by weight of the cement mixture.

[0045] Furthermore, refractory mortar is made of aluminum oxide (Al)２ O ３ Iron oxide Fe ２ O ３ and silicon dioxide SiO ２ It is a mixture consisting of [the specified components].

[0046] Then, in the mixer, add 3 parts by weight or more and 7 parts by weight or less of Portland cement, 1 part by weight or more and 4 parts by weight or less of kaolin, 0.1 parts by weight or more and 2 parts by weight or less of Beston, and sodium carbonate (Na). ２ CO ３ Add 0.05 parts by weight or more and 0.15 parts by weight or less of metholose, 0.05 parts by weight or more and 0.15 parts by weight or less of milk casein, stir for 30 minutes or more and knead, then add 1 part by weight or more and 5 parts by weight or less of perlite, and aluminum oxide Al ２ O ３ Add 5 parts by weight or more and 20 parts by weight or less of the mixture and 5 parts by weight or more and 20 parts by weight or less of the refractory mortar, and mix.

[0047] In this way, refractory powder is manufactured.

[0048] Furthermore, the ingredients are 5 parts by weight of Portland cement, 2.5 parts by weight of kaolin, 0.5 parts by weight of beston, and sodium carbonate (Na). ２ CO ３ If 0.1 parts by weight of , 0.1 parts by weight of metholose and 0.5 parts by weight of milk casein are used, the cement mixture will be 8.7 parts by weight, the perlite will be 2.6 parts by weight, and the aluminum oxide Al ２ O ３ The mortar will be 11.3 parts by weight, and the refractory powder will be 33.9 parts by weight.

[0049] In the cement mixture, Portland cement is 57.47% by weight, kaolin is 28.73% by weight, beston is 5.75% by weight, and sodium carbonate (Na) is present. ２ CO ３ It accounts for 1.15% by weight, methylose 1.15% by weight, and milk casein 5.75% by weight.

[0050] Next, once the liquid heat-resistant binder and refractory powder are produced in this manner, 2 parts by weight of the refractory powder, 1.2 parts by weight of the heat-resistant binder, and 0.024 parts by weight of the hardener are prepared in order to produce refractory bricks.

[0051] Next, 2 parts by weight of refractory powder and 0.024 parts by weight of hardener are added to a mixing container, and after the powders are thoroughly mixed, 0.6 parts by weight (half the amount) of liquid heat-resistant binder is added and mixed until it is close to a powder, and then the remaining 0.6 parts by weight of liquid heat-resistant binder is added and mixed thoroughly.

[0052] In this way, the fire-resistant castable of the present invention, that is, a mortar-like fire-resistant castable as a second fire-resistant material, can be manufactured.

[0053] Next, the refractory castable is poured into a mold, pressurized to the required pressure, demolded after 2-3 days, and then air-dried for another 3-5 days to produce the refractory bricks, which are the first refractory material.

[0054] In this case, refractory bricks can be manufactured by natural drying without firing, thus lowering the cost of refractory bricks.

[0055] Next, an incinerator equipped with a furnace wall formed using the mortar-like refractory castable of the present invention will be described.

[0056] Figure 2 is a cross-sectional view of a main part showing an example of an incinerator in which a refractory material is used in the furnace wall according to a second embodiment of the present invention.

[0057] In the figure, 11 is an incinerator as a furnace, 12 is industrial waste as the material to be incinerated, 54 is the furnace wall, 18 is the incineration chamber formed by being surrounded by the furnace wall 54, 21 is a grate as the firebed, Tx is a temperature sensor as a temperature detection unit, and 25 is an air supply duct as an air supply device. A burner (not shown) is installed facing the incineration chamber 18.

[0058] Furthermore, 31 is a water injection nozzle as a water injection device, 33 is a water supply pipe, 35 is a water storage container, and 37 is an on / off valve as a water supply valve.

[0059] In this embodiment, the furnace wall 54 is formed by a refractory brick layer 55, a refractory castable layer 56, and a furnace cover 44 as an outer covering that surrounds the outer surface of the refractory brick layer 55.

[0060] The refractory brick layer 55 is formed by laminating conventional refractory bricks, for example, refractory bricks with a refractory rating of SK-32, and the refractory castable layer 56 is formed by applying the mortar-like refractory castable of the present invention to the surface of the refractory brick layer 55 to a thickness of 30 mm or more and 60 mm or less.

[0061] The fire-resistant castable coating is applied by methods such as trowel application using a plasterer's trowel or spray application using a spray machine.

[0062] The mortar-like refractory castable of the present invention is manufactured by kneading refractory powder with a liquid heat-resistant binder manufactured in the first embodiment.

[0063] Next, a third embodiment of the present invention will be described.

[0064] Figure 3 is a cross-sectional view showing an example of a heat treatment furnace in which a refractory material is used in the furnace wall according to a third embodiment of the present invention.

[0065] In the figure, 61 is a heat treatment furnace, and 62 is a steel material to be treated by the heat treatment furnace 61, such as quenching. The heat treatment furnace 61 consists of a furnace body 61a and a door (hatch) 61b that is installed to the furnace body 61a so as to be openable and closable.

[0066] Furthermore, 64 is the furnace wall, 68 is the heat treatment chamber formed by the furnace wall 64, 71 is a support stand for supporting and transporting the steel material 62, and Ty is a temperature sensor, which serves as a temperature detection unit, installed on the support stand 71. A burner, not shown, is installed facing the heat treatment chamber 68 as a heat source.

[0067] However, if the furnace wall 64 is made of conventional refractory bricks, for example, refractory bricks with a refractory rating of SK-32, when the heat treatment is completed and the door 61b is opened, cold air from outside the furnace enters the heat treatment chamber 68 and rapidly cools the furnace wall 64, causing cracks to form in the refractory bricks and damaging the furnace wall 64.

[0068] Therefore, in this embodiment, the furnace wall 64 is formed by a refractory brick layer 73 and a furnace cover 74 as an outer covering that surrounds the outer surface of the refractory brick layer 73. The refractory brick layer 73 is formed by laminating the refractory brick of the present invention, that is, the refractory brick as the first refractory material, which does not crack even when rapidly cooled.

[0069] The refractory brick is manufactured by mixing refractory powder with a liquid heat-resistant binder manufactured in the first embodiment to produce a mortar-like refractory castable, pouring the refractory castable into a mold, pressurizing it with the necessary pressure, and then demolding it.

[0070] In this embodiment, the furnace wall 64 is formed by a refractory brick layer 73 and a furnace cover 74 surrounding the outer surface of the refractory brick layer 73. However, the furnace wall can also be formed by a refractory brick layer formed by laminating conventional refractory bricks, for example, refractory bricks with a refractory grade of SK-32, a refractory castable layer formed by applying a mortar-like second refractory material, a refractory castable, to the surface of the refractory brick layer, and a furnace cover surrounding the outer surface of the refractory brick layer.

[0071] Next, we will describe the test results when conventional refractory bricks, the refractory bricks of the present invention used in the refractory brick layers 43 and 73 arranged in the furnace walls 14 and 74 in the first and third embodiments, and the refractory castable of the present invention used in the refractory castable layer 73 in the second embodiment were used as test subjects, and the durability of the test subjects was demonstrated by heating them to a high temperature and rapidly cooling them.

[0072] Figure 4 is a conceptual diagram of a heating furnace for demonstration tests to heat the test subject to a high temperature.

[0073] In the figure, 80 is the subject, 81 is a heating furnace for a demonstration test that heats the subject 80 to a radiation temperature of 1150 [°C], and Tz is a temperature sensor that serves as a temperature detection unit for measuring the radiation temperature of the subject 80.

[0074] The heating furnace 81 includes a support section 83 at the top for supporting the subject 80, an opening 85 on the side for introducing combustion air, and a combustion chamber 88 inside which the charcoal 87 is burned.

[0075] A blower 89 is positioned facing the opening 85 to supply combustion air to the combustion chamber 88.

[0076] In this case, a conventional refractory brick with a fire resistance of SK-32 was designated as the first test subject 80, a conventional refractory brick with a fire resistance of SK-32 was used as a base, and a conventional refractory castable was applied to the conventional refractory brick to a thickness of 30 mm was designated as the second test subject 80, the refractory brick of the present invention used in the refractory brick layers 43 and 73 in the first and third embodiments was designated as the third test subject 80, a conventional refractory brick with a fire resistance of SK-32 was used as a base, and a conventional refractory castable of the present invention used in the refractory castable layer 73 in the second embodiment was applied to the conventional refractory brick was designated as the fourth test subject 80, and a refractory brick of the present invention used in the refractory brick layers 43 and 73 in the first and third embodiments was used as a base, and a refractory castable of the present invention used in the refractory castable layer 73 in the second embodiment was applied to the refractory brick of the present invention was designated as the fifth test subject 80.

[0077] Next, the results of the durability demonstration tests conducted on each of the first to fifth test subjects 80 will be explained. ・For the first test subject 80, after heating the first test subject 80 to 1150°C for 60 minutes, it was removed from the heating furnace 81, and after pouring room temperature water on it and the steam subsided, the first test subject 80 was observed and found to have cracks throughout the conventional refractory brick. Subsequently, the first test subject 80 was returned to the heating furnace 81 and heated again for 60 minutes, then removed from the heating furnace 81, and after pouring room temperature water on it, it shattered and lost its original shape. ・For the second test subject 80, after heating the second test subject 80 to 1150°C for 60 minutes, it was removed from the heating furnace 81, and after pouring room temperature water on it and the steam subsided, the second test subject 80 was observed and found to have pulverized and peeled away from the conventional refractory brick, and cracks throughout the conventional refractory brick. Regarding the third test subject 80, after heating the third test subject 80 to 1150°C for 60 minutes, it was removed from the heating furnace 81, and after pouring room temperature water over it and the steam subsided, the third test subject 80 was observed and found that no cracks had occurred in the refractory bricks of the present invention in the refractory brick layers 43 and 73. Subsequently, the third test subject 80 was returned to the heating furnace 81 and heated for 120 minutes, then removed from the heating furnace 81, and after pouring room temperature water over it and the steam subsided, the third test subject 80 was observed and found that no cracks had occurred in the refractory bricks of the present invention in the refractory brick layers 43 and 73. Furthermore, the third test subject 80 was returned to the heating furnace 81 and heated for 180 minutes, then removed from the heating furnace 81, and after pouring room temperature water over it and the steam subsided, the third test subject 80 was observed and found that no cracks had occurred in the refractory bricks of the present invention in the refractory brick layers 43 and 73.

[0078] Subsequently, the third test subject 80 was subjected to seven heating and cooling cycles of 60 minutes each, and upon observation of the third test subject 80 each time, no cracks were found in the refractory bricks of the present invention in the refractory brick layers 43 and 73. Similarly to the third test subject 80, the fourth test subject 80 was subjected to heating and cooling cycles of 60 minutes, 120 minutes, and 180 minutes, and then seven heating and cooling cycles of 60 minutes each time. Upon observation of the fourth test subject 80 each time, the refractory castable of the present invention in the refractory castable layer 73 had not peeled off from the conventional refractory bricks, and no cracks were found in the conventional refractory bricks. - Regarding the fifth subject 80, in the same manner as the third subject 80, heating and cooling were performed on the fifth subject 80 for 60 minutes, 120 minutes, and 180 minutes, followed by 60 minutes of heating and cooling seven times. Each time, the fifth subject 80 was observed and found that the refractory castable layer 73 of the present invention had not peeled off from the refractory brick layers 43 and 73 of the present invention, and no cracks had occurred in the refractory bricks of the present invention.

[0079] In this embodiment, the refractory castable of the present invention is produced by mixing, stirring, and kneading a liquid heat-resistant binder containing at least sodium silicate, potassium silicate, Snowtex, wood clay, and Beston with a refractory powder containing at least Beston, milk casein, and perlite, and then placing the refractory castable into a mold and drying it to produce the refractory brick of the present invention.

[0080] Therefore, in this embodiment, even if the refractory bricks are heated to a high temperature and then rapidly cooled, cracks will not occur in the refractory bricks, and the refractory castable will not peel off from the substrate, such as refractory bricks with a fire resistance of SK-32.

[0081] It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways based on the spirit of the present invention, without excluding them from the scope of the present invention.

[0082] 11 Incinerator 14, 54, 64 Furnace wall 43, 73 Refractory brick layer 56 Refractory castable layer

Claims

1. A refractory material characterized by comprising a mixture of a liquid heat-resistant binder containing at least sodium silicate, potassium silicate, Snowtex, wood clay, and Beston, and a refractory powder containing at least Beston, milk casein, and perlite.

2. The fire-resistant material according to claim 1, which is placed in a mold and dried to form a fire-resistant brick.

3. The fire-resistant material according to claim 1, which is formed in a mortar-like state and made into a fire-resistant castable.

4. A method for producing a refractory material, characterized by mixing a liquid heat-resistant binder containing at least sodium silicate, potassium silicate, Snowtex, wood clay, and Beston with a refractory powder containing at least Beston, milk casein, and perlite, stirring, kneading, placing the mixture into a mold, and drying it.

5. A method for producing a refractory material, characterized by mixing a liquid heat-resistant binder containing at least sodium silicate, potassium silicate, Snowtex, wood clay, and Beston with a refractory powder containing at least Beston, milk casein, and perlite, stirring, kneading, and forming a mortar-like substance.

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