CN114874018A - Heat-insulating energy-saving high-temperature refractory material for industrial kiln and preparation method thereof - Google Patents
Heat-insulating energy-saving high-temperature refractory material for industrial kiln and preparation method thereof Download PDFInfo
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- CN114874018A CN114874018A CN202210674717.9A CN202210674717A CN114874018A CN 114874018 A CN114874018 A CN 114874018A CN 202210674717 A CN202210674717 A CN 202210674717A CN 114874018 A CN114874018 A CN 114874018A
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- 239000011819 refractory material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000004927 clay Substances 0.000 claims abstract description 23
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 23
- 239000010431 corundum Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004964 aerogel Substances 0.000 claims abstract description 11
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims abstract description 8
- 239000000378 calcium silicate Substances 0.000 claims abstract description 8
- 229910052918 calcium silicate Inorganic materials 0.000 claims abstract description 8
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007667 floating Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 3
- 229910052863 mullite Inorganic materials 0.000 claims description 39
- 238000003756 stirring Methods 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 13
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 5
- 239000008030 superplasticizer Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000002715 modification method Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005120 petroleum cracking Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3436—Alkaline earth metal silicates, e.g. barium silicate
- C04B2235/3454—Calcium silicates, e.g. wollastonite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention relates to the technical field of refractory materials, and provides an industrial kiln heat-preservation energy-saving high-temperature refractory material and a preparation method thereof, wherein the industrial kiln heat-preservation energy-saving high-temperature refractory material comprises the following raw materials in parts by weight: 30-40 parts of ceramsite concrete, 10-20 parts of white clay, 25-35 parts of modified mullite, 20-30 parts of white corundum, 6-10 parts of floating beads, 1-4 parts of calcium silicate, 2-5 parts of aluminum silicate, 7-10 parts of aerogel, 1-3 parts of a water reducing agent and 330 parts of water-containing material, wherein the modified mullite is prepared by modifying calcium aluminate. Through above-mentioned technical scheme, the problem that refractory material compressive strength and rupture strength need be improved among the prior art has been solved.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a heat-preservation energy-saving high-temperature refractory material for an industrial kiln and a preparation method thereof.
Background
The refractory material industry is the industrial foundation of China, the refractory material is widely applied to the fields of steel, boilers, electric power, metal, military industry and the like, plays an irreplaceable important role in the development of high-temperature industrial production, an industrial kiln is a main energy consumption device in the production process in the hot working process of various industries, and the industrial kiln has higher requirements on the heat preservation performance of the refractory material, including the increase of the sealing performance of the industrial kiln, the reduction of heat dissipation loss, the improvement of the heating speed, the energy-saving effect and the like.
In the production and preparation processes of the existing refractory materials for industrial kilns, the phenomenon of poor mixing effect of all raw materials exists, so that the compressive strength and the rupture strength of the refractory materials are influenced.
Disclosure of Invention
The invention provides a heat-insulating energy-saving high-temperature refractory material for an industrial kiln and a preparation method thereof, and solves the problem that the compressive strength and the breaking strength of the refractory material in the prior art need to be improved.
The technical scheme of the invention is as follows:
the heat-insulating energy-saving high-temperature refractory material for the industrial kiln comprises the following raw materials in parts by weight: 30-40 parts of ceramsite concrete, 10-20 parts of white clay, 25-35 parts of mullite, 20-30 parts of white corundum, 6-10 parts of floating beads, 1-4 parts of calcium silicate, 2-5 parts of aluminum silicate, 7-10 parts of aerogel, 1-3 parts of naphthalene-based superplasticizer and 12-25 parts of water, wherein the mullite is modified mullite.
As a further technical scheme, the mullite is modified by active alumina micropowder and silica sol.
As a further technical scheme, the mullite modification method comprises the following steps:
1) putting 1-3 parts by weight of mullite into 3 parts by weight of dilute hydrochloric acid solution, heating to 40-50 ℃, and stirring for 15-25 min;
2) filtering the mixed solution obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by using distilled water, and then drying the solid particles;
3) uniformly mixing the mullite obtained in the step 2) with 0.04-0.09 part by weight of active alumina micro powder, then adding 0.06-0.1 part by weight of silica sol, and uniformly mixing to obtain the modified mullite.
As a further technical scheme, the mass concentration of the dilute hydrochloric acid is 2-6%.
As a further technical scheme, the grain diameter of the mullite is 0.5-1.2 mm.
As a further technical scheme, the grain diameter of the white corundum is 0.04-0.09mm, and the grain diameter of the white clay is 0.05-0.08 mm.
The invention also provides a preparation method of the heat-preservation energy-saving high-temperature refractory material for the industrial kiln, which comprises the following preparation steps:
1) uniformly stirring ceramsite concrete, white clay, white corundum, floating beads, calcium silicate and aluminum silicate, adding water, and stirring;
2) adding a water reducing agent in the mixing process in the step 1), and uniformly stirring to obtain a mixture;
3) mixing the modified mullite with the mixture obtained in the step 2), adding aerogel, uniformly stirring, and sintering at high temperature to obtain the refractory material.
As a further technical scheme, the stirring time in the step 2) is 2-3h, and the stirring time in the step 3) is 2 h.
As a further technical scheme, the high-temperature sintering temperature of the step 3) is 1500-.
The working principle and the beneficial effects of the invention are as follows:
1. the refractory material has excellent normal-temperature compressive strength and normal-temperature flexural strength, wherein the normal-temperature compressive strength can reach 142.2MPa, and the normal-temperature flexural strength can reach 89.1MPa, so that the refractory material can be used for high-temperature industrial equipment such as high-temperature industrial kilns, smelting furnaces, petroleum cracking furnaces and the like, and materials such as steel products requiring high-temperature fireproof protection, and has wide application scenes and high potential market value.
2. According to the invention, the aerogel is sintered to prepare the aerogel type porous material, the advantage of adjustable pore diameter of the aerogel is fully utilized to prepare the porous material with different pore diameter requirements from micropores to macropores, and the problem of gel skeleton densification caused by direct sintering of the traditional gel is avoided.
3. According to the invention, the reasonable grain size collocation of the mullite, the white clay and the white corundum is obtained by optimizing and adjusting the grain sizes of the mullite, the white clay and the white corundum, so that the mullite, the white clay and the white corundum are synergistic in the refractory material, and the normal-temperature compressive strength and the normal-temperature flexural strength of the refractory material are obviously improved.
4. According to the invention, hydrochloric acid and active alumina micro powder are adopted to modify mullite, wherein hydrochloric acid dissolves impurities on the surface of the mullite, and the active alumina micro powder reduces the apparent porosity, so that the volume density of a mixture of the mullite and silica sol is increased, and the normal-temperature compressive strength and the normal-temperature flexural strength of the refractory material are enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
Preparation example 1
The preparation method of the modified mullite comprises the following steps:
1) putting 1kg of mullite into 3kg of dilute hydrochloric acid solution with the mass concentration of 2%, heating to 45 ℃, and stirring for 20min to obtain a mixture;
2) filtering the mixture obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by using distilled water, and then drying the solid particles;
3) uniformly mixing the mullite obtained in the step 2) with 0.04kg of active alumina micro powder, then adding 0.06kg of silica sol, and uniformly mixing to obtain the modified mullite.
Preparation example 2
The preparation method of the modified mullite comprises the following steps:
1) putting 2kg of mullite into 3kg of dilute hydrochloric acid solution with the mass concentration of 4%, heating to 45 ℃, and stirring for 20 min; obtaining a mixture;
2) filtering the mixture obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by using distilled water, and then drying the solid particles;
3) uniformly mixing the mullite obtained in the step 2) with 0.06kg of active alumina micro powder, then adding 0.08kg of silica sol, and uniformly mixing to obtain the modified mullite.
Preparation example 3
The preparation method of the modified mullite comprises the following steps:
1) putting 3kg of mullite into 3kg of dilute hydrochloric acid solution with the mass concentration of 6%, heating to 45 ℃, and stirring for 20 min; obtaining a mixture;
2) filtering the mixture obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by using distilled water, and then drying the solid particles;
3) uniformly mixing the mullite obtained in the step 2) with 0.09kg of active alumina micro powder, then adding 0.1kg of silica sol, and uniformly mixing to obtain the modified mullite.
Example 1
A heat-insulating energy-saving high-temperature refractory material for industrial kilns and furnaces is prepared by the following steps:
s1, uniformly stirring 30kg of ceramsite concrete, 10kg of white clay, 20kg of white corundum, 6kg of floating bead, 1kg of calcium silicate and 2kg of aluminum silicate, and adding 12kg of water for stirring;
s2, adding 1kg of naphthalene-based superplasticizer during the stirring process of S1, and stirring for 2.5 hours to obtain a uniform mixture;
s3, adding 25kg of modified mullite into the mixture obtained in the step S2, adding 7kg of aerogel, stirring for 2 hours until the mixture is uniform, and sintering at 1600 ℃ for 4 hours to obtain the refractory material.
Wherein the modified mullite is obtained from preparation example 1, the grain diameter of the mullite is 0.8mm, the grain diameter of the white corundum is 0.06mm, and the grain diameter of the white clay is 0.07 mm.
Example 2
A heat-insulating energy-saving high-temperature refractory material for industrial kilns and furnaces is prepared by the following steps:
s1, uniformly stirring 35kg of ceramsite concrete, 15kg of white clay, 25kg of white corundum, 8kg of floating bead, 3kg of calcium silicate and 4kg of aluminum silicate, and adding 20kg of water for stirring;
s2, adding 2kg of naphthalene-based superplasticizer during the stirring process of S1, and stirring for 2.5 hours to obtain a uniform mixture;
and S3, adding 30kg of modified mullite into the mixture obtained in the step S2, adding 8kg of aerogel, stirring for 2 hours until the mixture is uniform, and sintering at 1600 ℃ for 4 hours to obtain the refractory material.
Wherein the modified mullite is obtained from preparation example 2, the grain diameter of the mullite is 0.8mm, the grain diameter of the white corundum is 0.06mm, and the grain diameter of the white clay is 0.07 mm.
Example 3
A heat-insulating energy-saving high-temperature refractory material for industrial kilns and furnaces is prepared by the following steps:
s1, uniformly stirring 40kg of ceramsite concrete, 20kg of white clay, 30kg of white corundum, 10kg of floating bead, 4kg of calcium silicate and 5kg of aluminum silicate, and then adding 25kg of water for stirring;
s2, adding 3kg of naphthalene-based superplasticizer in the process of stirring in S1, and stirring for 2.5 hours to obtain a uniform mixture;
s3, adding 35kg of modified mullite into the mixture obtained in the step S2, adding 10kg of aerogel, stirring for 2 hours until the mixture is uniform, and sintering at 1600 ℃ for 4 hours to obtain the refractory material.
Wherein the modified mullite is obtained from preparation example 3, the grain diameter of the mullite is 0.8mm, the grain diameter of the white corundum is 0.06mm, and the grain diameter of the white clay is 0.07 mm.
Example 4
The heat-insulating energy-saving high-temperature refractory material for industrial kiln and furnace is different from that in example 1 in that the added mullite has grain size of 0.5mm, white corundum has grain size of 0.04mm and white clay has grain size of 0.05mm, and the rest steps are the same as those in example 1.
Example 5
The heat-insulating energy-saving high-temperature refractory material for industrial kiln and furnace is different from that in example 1 in that the added mullite has grain size of 1.2mm, white corundum has grain size of 0.09mm and white clay has grain size of 0.08mm, and the rest steps are the same as those in example 1.
Example 6
The heat-insulating energy-saving high-temperature refractory material for the industrial kiln is different from the material in the embodiment 1 in that the added modified mullite is replaced by the mullite with the same weight part, and the rest steps are the same as the steps in the embodiment 1.
Example 7
The heat-insulating energy-saving high-temperature refractory material for industrial kiln and furnace is different from that in example 1 in that the added mullite has grain size of 0.4mm, white corundum has grain size of 0.03mm and white clay has grain size of 0.04mm, and the rest steps are the same as those in example 1.
Example 8
The heat-insulating energy-saving high-temperature refractory material for industrial kiln and furnace is different from that in example 1 in that the added mullite has grain size of 1.4mm, white corundum has grain size of 0.11mm and white clay has grain size of 0.1mm, and the rest steps are the same as those in example 1.
Performance test
Test of
The refractory materials were prepared according to the methods of examples 1 to 8, and the curing methods were the same, and the room temperature compressive strength and the room temperature flexural strength of the prepared refractory materials were measured according to the detection methods of GB/T5072-.
TABLE 1 test results of compression strength at ambient temperature and rupture strength at ambient temperature for the refractory materials of examples 1-8
| Block of medicine | Normal temperature compressive strength (Mpa) | Normal temperature rupture strength (Mpa) |
| Example 1 | 138.8 | 85.6 |
| Example 2 | 142.2 | 89.1 |
| Example 3 | 139.9 | 87.1 |
| Example 4 | 135.3 | 83.2 |
| Example 5 | 134.9 | 82.9 |
| Example 6 | 125.6 | 74.5 |
| Example 7 | 131.6 | 81.5 |
| Example 8 | 132.1 | 81.7 |
From the detection data of the embodiments 1 to 3, it can be seen that the normal temperature compressive strength and the normal temperature rupture strength of the refractory material prepared in the embodiment 2 are the best, the normal temperature compressive strength reaches 152.2MPa, and the normal temperature rupture strength is 89.1MPa, which indicates that the normal temperature compressive strength and the normal temperature rupture strength of the refractory material are the best under the action of the modified mullite prepared in the preparation example 2.
It can be seen from the test data of example 1 and examples 4-5 that the particle sizes of mullite, white corundum, and white clay affect the compressive strength and the flexural strength at room temperature of the refractory material, and the particle sizes of mullite, white corundum, and white clay in example 1 can make the compressive strength and the flexural strength at room temperature of the refractory material better.
As can be seen from the detection data of the embodiment 1 and the embodiment 6, the mullite is treated by hydrochloric acid and then is uniformly mixed with the active alumina micro powder, and the silica sol is added to obtain the modified mullite, so that the refractory material shows better normal-temperature compressive strength and normal-temperature rupture strength due to the addition of the modified mullite.
As can be seen from the test data of example 1 and examples 7 to 8, the grain size of mullite is in the range of 0.5 to 1.2mm, the grain size of white corundum is in the range of 0.04 to 0.09mm, and the grain size of white clay is in the range of 0.05 to 0.08mm, and the refractory material shows better room-temperature compressive strength and room-temperature rupture strength.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The heat-insulating energy-saving high-temperature refractory material for the industrial kiln is characterized by comprising the following raw materials in parts by weight: 30-40 parts of ceramsite concrete, 10-20 parts of white clay, 25-35 parts of mullite, 20-30 parts of white corundum, 6-10 parts of floating beads, 1-4 parts of calcium silicate, 2-5 parts of aluminum silicate, 7-10 parts of aerogel, 1-3 parts of naphthalene-based superplasticizer and 12-25 parts of water, wherein the mullite is modified mullite.
2. The heat-insulating energy-saving high-temperature refractory material for the industrial kiln as claimed in claim 1, wherein the mullite is mullite modified by active alumina micropowder and silica sol.
3. The heat-insulating energy-saving high-temperature refractory material for the industrial kiln as claimed in claim 2, wherein the mullite modification method is as follows:
1) putting 1-3 parts by weight of mullite into 3 parts by weight of dilute hydrochloric acid solution, heating to 40-50 ℃, and stirring for 15-25 min;
2) filtering the mixed solution obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by using distilled water, and then drying the solid particles;
3) uniformly mixing the mullite obtained in the step 2) with 0.04-0.09 part by weight of active alumina micro powder, then adding 0.06-0.1 part by weight of silica sol, and uniformly mixing to obtain the modified mullite.
4. The heat-insulating energy-saving high-temperature refractory material for the industrial kiln as claimed in claim 2, wherein the mass concentration of the dilute hydrochloric acid is 2-6%.
5. The heat-insulating energy-saving high-temperature refractory material for the industrial kiln as claimed in claim 1, wherein the grain size of the mullite is 0.5-1.2 mm.
6. The heat-insulating energy-saving high-temperature refractory material for the industrial kiln as claimed in claim 1, wherein the white corundum has a particle size of 0.04-0.09mm, and the white clay has a particle size of 0.05-0.08 mm.
7. The preparation method of the heat-insulating energy-saving high-temperature refractory material for the industrial kiln and furnace as claimed in any one of claims 1 to 6 is characterized by comprising the following preparation steps:
1) uniformly stirring ceramsite concrete, white clay, white corundum, floating beads, calcium silicate and aluminum silicate, adding water, and stirring;
2) adding a water reducing agent in the mixing process in the step 1), and uniformly stirring to obtain a mixture;
3) mixing the modified mullite with the mixture obtained in the step 2), adding aerogel, uniformly stirring, and sintering at high temperature to obtain the refractory material.
8. The method for preparing the heat-insulating energy-saving high-temperature refractory material for the industrial kiln as claimed in claim 7, wherein the stirring time in the step 2) is 2-3h, and the stirring time in the step 3) is 2 h.
9. The method as claimed in claim 7, wherein the sintering temperature in step 3) is 1500-.
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Effective date of registration: 20240219 Address after: 050000 room 1302, unit 02, commercial office building 4, hengdacheng, 266 Weiming South Street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee after: HEBEI HONGHUA ENERGY SAVING TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 050000 room 1302, unit 02, commercial office building 4, hengdacheng, 266 Weiming South Street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee before: Ping Yuying Country or region before: China |