CN114874018B - Heat-preserving energy-saving high-temperature refractory material for industrial kiln and preparation method thereof - Google Patents
Heat-preserving energy-saving high-temperature refractory material for industrial kiln and preparation method thereof Download PDFInfo
- Publication number
- CN114874018B CN114874018B CN202210674717.9A CN202210674717A CN114874018B CN 114874018 B CN114874018 B CN 114874018B CN 202210674717 A CN202210674717 A CN 202210674717A CN 114874018 B CN114874018 B CN 114874018B
- Authority
- CN
- China
- Prior art keywords
- parts
- mullite
- refractory material
- temperature
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011819 refractory material Substances 0.000 title claims abstract description 58
- 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 64
- 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 18
- 239000004964 aerogel Substances 0.000 claims abstract description 12
- 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
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 229910052863 mullite Inorganic materials 0.000 claims description 40
- 238000002156 mixing Methods 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 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
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 8
- 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
- 238000005406 washing Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 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 7
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000008030 superplasticizer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 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
- 238000000280 densification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000008187 granular material Substances 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
- 150000002739 metals Chemical class 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
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C04B2235/36—Glass starting materials for making ceramics, e.g. silica 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
- C04B2235/70—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
-
- 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
- C04B2235/70—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
-
- 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 type high-temperature refractory material and a preparation method thereof, wherein the industrial kiln heat-preservation energy-saving type 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 reducer and 250-330 parts of water, wherein the modified mullite is prepared by modifying calcium aluminate. Through the technical scheme, the problem that the compressive strength and the flexural strength of the refractory material in the prior art are to be improved is solved.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to an industrial kiln heat-preservation energy-saving type high-temperature refractory material and a preparation method thereof.
Background
The refractory material industry is an industrial foundation in China, the refractory material is widely applied to the fields of steel, boilers, electric power, metals, military industry and the like, plays an irreplaceable important role in the development of high-temperature industrial production, and in the hot working process of each industry, an industrial kiln is main energy-consuming equipment in the production process, and has higher requirements on the heat preservation of the refractory material, including the improvement of the sealing property 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 process of the existing industrial kiln refractory material, the phenomenon of poor mixing effect of all raw materials exists, so that the compressive strength and the flexural strength of the refractory material are affected.
Disclosure of Invention
The invention provides an industrial kiln heat-preservation energy-saving high-temperature refractory material and a preparation method thereof, which solve the problem that the compressive strength and the flexural strength of the refractory material in the prior art are to be improved.
The technical scheme of the invention is as follows:
an 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 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 high-efficiency water reducer and 12-25 parts of water, wherein the mullite is modified mullite.
As a further technical scheme, the mullite is mullite modified by activated alumina micropowder and silica sol.
As a further technical scheme, the modification method of the mullite comprises the following steps:
1) Adding 1-3 parts by weight of mullite into 3 parts by weight of dilute hydrochloric acid solution, heating to 40-50 ℃, and stirring for 15-25min;
2) Filtering the mixed solution obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by distilled water, and then drying the solid particles;
3) Uniformly mixing the mullite obtained in the step 2) with 0.04-0.09 weight part of active alumina micropowder, then adding 0.06-0.1 weight part 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 0.5-1.2mm.
As a further technical scheme, the particle size of the white corundum is 0.04-0.09mm, and the particle size of the white clay is 0.05-0.08mm.
The invention also provides a preparation method of the heat-preservation energy-saving high-temperature refractory material of 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, and then adding water for mixing;
2) Adding the water reducer in the mixing process of 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 2h.
As a further technical scheme, the high-temperature sintering temperature of the step 3) is 1500-1750 ℃.
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, the normal-temperature flexural strength can reach 89.1MPa, and the refractory material can be used for high-temperature industrial equipment such as high-temperature industrial kilns, smelting furnaces and petroleum cracking furnaces, and materials such as steel materials requiring high-temperature fireproof protection, and has wide application scenes and high potential market value.
2. According to the invention, the aerogel is adopted to sinter the aerogel to prepare the aerogel porous material, the advantage of adjustable pore size of the aerogel is fully utilized, the porous material with different pore sizes from micropores to macropores is prepared, and the problem of gel skeleton densification caused by direct sintering of the traditional gel is avoided.
3. According to the invention, the reasonable particle size collocation of the mullite, the white clay and the white corundum is obtained by optimally adjusting the particle 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 remarkably improved.
4. According to the invention, the mullite is modified by adopting the hydrochloric acid and the activated alumina micropowder, wherein the hydrochloric acid dissolves impurities on the surface of the mullite, the activated alumina micropowder reduces apparent porosity, so that the volume density of the mixture of the mullite and the 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 of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 distilled water, and then drying the solid particles;
3) Uniformly mixing the mullite obtained in the step 2) with 0.04kg of activated alumina micropowder, then adding 0.06kg of silica sol, and uniformly mixing to obtain the modified mullite.
Preparation example 2
A modified mullite is prepared by the following steps:
1) 2kg of mullite is put into 3kg of dilute hydrochloric acid solution with the mass concentration of 4 percent, heated to 45 ℃ and stirred for 20min; obtaining a mixture;
2) Filtering the mixture obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by distilled water, and then drying the solid particles;
3) Uniformly mixing the mullite obtained in the step 2) with 0.06kg of activated alumina micropowder, then adding 0.08kg of silica sol, and uniformly mixing to obtain the modified mullite.
Preparation example 3
A modified mullite is prepared by the following steps:
1) 3kg of mullite is put into 3kg of dilute hydrochloric acid solution with the mass concentration of 6%, heated to 45 ℃ and stirred for 20min; obtaining a mixture;
2) Filtering the mixture obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by distilled water, and then drying the solid particles;
3) Uniformly mixing the mullite obtained in the step 2) with 0.09kg of activated alumina micropowder, then adding 0.1kg of silica sol, and uniformly mixing to obtain the modified mullite.
Example 1
An industrial kiln heat-preserving energy-saving high-temperature refractory material, which comprises the following preparation method:
s1, uniformly stirring 30kg of ceramsite concrete, 10kg of white clay, 20kg of white corundum, 6kg of floating beads, 1kg of calcium silicate and 2kg of aluminum silicate, and then adding 12kg of water for mixing;
s2, adding 1kg of naphthalene-based superplasticizer in the mixing process of S1, and stirring for 2.5 hours to obtain a uniform mixture;
and S3, adding 25kg of modified mullite and 7kg of aerogel into the mixture obtained in the step S2, stirring for 2 hours until the mixture is uniform, and sintering for 4 hours at the temperature of 1600 ℃ to obtain the refractory material.
Wherein the modified mullite is prepared from preparation example 1, the grain size of the mullite is 0.8mm, the grain size of the white corundum is 0.06mm, and the grain size of the white clay is 0.07mm.
Example 2
An industrial kiln heat-preserving energy-saving high-temperature refractory material, which comprises the following preparation method:
s1, uniformly stirring 35kg of ceramsite concrete, 15kg of white clay, 25kg of white corundum, 8kg of floating beads, 3kg of calcium silicate and 4kg of aluminum silicate, and then adding 20kg of water for mixing;
s2, adding 2kg of naphthalene-based superplasticizer in the mixing process of S1, and stirring for 2.5 hours to obtain a uniform mixture;
s3, adding 30kg of modified mullite and 8kg of aerogel into the mixture obtained in the step S2, stirring for 2 hours until the mixture is uniform, and sintering for 4 hours at the temperature of 1600 ℃ to obtain the refractory material.
Wherein the modified mullite is prepared in preparation example 2, the grain size of the mullite is 0.8mm, the grain size of the white corundum is 0.06mm, and the grain size of the white clay is 0.07mm.
Example 3
An industrial kiln heat-preserving energy-saving high-temperature refractory material, which comprises the following preparation method:
s1, uniformly stirring 40kg of ceramsite concrete, 20kg of white clay, 30kg of white corundum, 10kg of floating beads, 4kg of calcium silicate and 5kg of aluminum silicate, and then adding 25kg of water for mixing;
s2, adding 3kg of naphthalene-based superplasticizer in the mixing process of S1, and stirring for 2.5 hours to obtain a uniform mixture;
and S3, adding 35kg of modified mullite and 10kg of aerogel into the mixture obtained in the step S2, stirring for 2 hours until the mixture is uniform, and sintering for 4 hours at the temperature of 1600 ℃ to obtain the refractory material.
Wherein the modified mullite is prepared from preparation example 3, the grain size of the mullite is 0.8mm, the grain size of the white corundum is 0.06mm, and the grain size of the white clay is 0.07mm.
Example 4
The heat-insulating energy-saving high-temperature refractory material for an industrial kiln is different from the heat-insulating energy-saving high-temperature refractory material for an industrial kiln in example 1 in that the grain size of added mullite is 0.5mm, the grain size of white corundum is 0.04mm, the grain size of white clay is 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 an industrial kiln is different from the heat-insulating energy-saving high-temperature refractory material for an industrial kiln in example 1 in that the grain size of added mullite is 1.2mm, the grain size of white corundum is 0.09mm, the grain size of white clay is 0.08mm, and the rest steps are the same as those of example 1.
Example 6
The heat-insulating energy-saving high-temperature refractory material for an industrial kiln is different from the heat-insulating energy-saving high-temperature refractory material for an industrial kiln in example 1 in that the added modified mullite is replaced by mullite with equal weight parts, and the rest steps are the same as those in example 1.
Example 7
The heat-insulating energy-saving high-temperature refractory material for an industrial kiln is different from the heat-insulating energy-saving high-temperature refractory material for an industrial kiln in example 1 in that the grain size of added mullite is 0.4mm, the grain size of white corundum is 0.03mm, the grain size of white clay is 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 an industrial kiln is different from the heat-insulating energy-saving high-temperature refractory material for an industrial kiln in example 1 in that the grain size of added mullite is 1.4mm, the grain size of white corundum is 0.11mm, the grain size of white clay is 0.1mm, and the rest steps are the same as those in example 1.
Performance test
Test
Refractory materials were prepared according to the methods of examples 1 to 8, respectively, and the methods of curing were the same, and the prepared refractory materials were subjected to measurement of normal temperature compressive strength and normal temperature flexural strength according to the methods of detection of GB/T5072-2008 "test method for normal temperature compressive strength of refractory materials" and GB/T3001-2017 "test method for normal temperature flexural strength of refractory materials", and the measurement results are shown in Table 1.
TABLE 1 results of test of room temperature compressive Strength and room temperature flexural Strength of refractory materials of examples 1-8
| Granule group | Normal temperature compressive strength (Mpa) | Normal temperature flexural 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 |
As can be seen from the detection data of examples 1-3, the heat-insulating energy-saving high-temperature refractory material for industrial kilns, which is prepared by the invention, has the advantages that the normal-temperature compressive strength and the normal-temperature flexural strength of the refractory material prepared by the example 2 are optimal, the normal-temperature compressive strength reaches 152.2MPa, the normal-temperature flexural strength is 89.1MPa, and the normal-temperature compressive strength and the normal-temperature flexural strength of the refractory material are optimal under the action of modified mullite of the preparation example 2.
As can be seen from the detection data of the embodiment 1 and the embodiment 4-5, the grain sizes of the mullite, the white corundum and the white clay influence the normal-temperature compressive strength and the normal-temperature flexural strength of the refractory material, and the grain sizes of the mullite, the white corundum and the white clay in the embodiment 1 can make the normal-temperature compressive strength and the normal-temperature flexural strength of the refractory material better.
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 activated alumina micropowder, and silica sol is added to obtain modified mullite, so that the refractory material shows better normal-temperature compressive strength and normal-temperature flexural strength due to the addition of the modified mullite.
From the test data of examples 1 and 7 to 8, it can be seen that the mullite grain size is in the range of 0.5 to 1.2mm, the white corundum grain size is in the range of 0.04 to 0.09mm, and the white clay grain size is in the range of 0.05 to 0.08mm, and the refractory material exhibits more excellent normal-temperature compressive strength and normal-temperature flexural strength.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
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 high-efficiency water reducer and 12-25 parts of water, wherein the mullite is modified mullite;
wherein the mullite is mullite modified by activated alumina micropowder and silica sol;
the modification method of the mullite comprises the following steps:
1) Adding 1-3 parts by weight of mullite into 3 parts by weight of dilute hydrochloric acid solution, heating to 40-50 ℃, and stirring for 15-25min;
2) Filtering the mixed solution obtained in the step 1) to obtain solid particles, washing the solid particles to be neutral by distilled water, and then drying the solid particles;
3) Uniformly mixing the mullite obtained in the step 2) with 0.04-0.09 weight part of active alumina micropowder, then adding 0.06-0.1 weight part of silica sol, and uniformly mixing to obtain modified mullite;
wherein the grain diameter of the mullite is 0.5-1.2mm.
2. The heat-preserving energy-saving high-temperature refractory material for industrial kilns according to claim 1, wherein the mass concentration of the dilute hydrochloric acid is 2-6%.
3. The heat-insulating energy-saving high-temperature refractory material for industrial kilns according to claim 1, wherein the particle size of the white corundum is 0.04-0.09mm, and the particle size of the white clay is 0.05-0.08mm.
4. A method for preparing the heat-preserving energy-saving type high-temperature refractory material of an industrial kiln according to any one of claims 1 to 3, which is characterized by comprising the following preparation steps:
1) Uniformly stirring ceramsite concrete, white clay, white corundum, floating beads, calcium silicate and aluminum silicate, and then adding water for mixing;
2) Adding the water reducer in the mixing process of 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.
5. The method for preparing the heat-preserving and energy-saving type high-temperature refractory material for the industrial kiln according to claim 4, wherein the stirring time in the step 2) is 2-3h, and the stirring time in the step 3) is 2h.
6. The method for preparing the heat-preserving and energy-saving high-temperature refractory material for industrial kilns according to claim 4, wherein the high-temperature sintering temperature in the step 3) is 1500-1750 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210674717.9A CN114874018B (en) | 2022-06-15 | 2022-06-15 | Heat-preserving energy-saving high-temperature refractory material for industrial kiln and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210674717.9A CN114874018B (en) | 2022-06-15 | 2022-06-15 | Heat-preserving energy-saving high-temperature refractory material for industrial kiln and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114874018A CN114874018A (en) | 2022-08-09 |
| CN114874018B true CN114874018B (en) | 2023-07-14 |
Family
ID=82680851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210674717.9A Active CN114874018B (en) | 2022-06-15 | 2022-06-15 | Heat-preserving energy-saving high-temperature refractory material for industrial kiln and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114874018B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992791A (en) * | 2012-11-13 | 2013-03-27 | 登封市宏发煤矿机械厂 | Baking-free refractory brick specially for preheating and cooling sections of lined heat-insulating layer of rotary kiln |
| CN103804002B (en) * | 2014-02-21 | 2015-06-10 | 武汉科技大学 | Light corundum-mullite refractory brick and preparation method thereof |
| CN107129212A (en) * | 2017-06-08 | 2017-09-05 | 合肥峰腾节能科技有限公司 | A kind of wall heat insulation material and preparation method thereof |
| CN107473754A (en) * | 2017-07-23 | 2017-12-15 | 启东久精耐火材料有限公司 | A kind of middle heavy castable refractory of Industrial Stoves working lining and preparation method thereof |
| CN107188589A (en) * | 2017-07-25 | 2017-09-22 | 合肥华盖光伏科技有限公司 | A kind of high-strength light insulating fire brick and preparation method thereof |
| CN107512920A (en) * | 2017-09-18 | 2017-12-26 | 北京利尔高温材料股份有限公司 | One kind direct-reduction kiln height temperate zone castable refractory and preparation method thereof |
| CN109305820A (en) * | 2018-12-20 | 2019-02-05 | 无锡远能耐火材料有限公司 | High-strength abrasion-proof castable refractory and preparation method thereof |
| CN110668830A (en) * | 2019-09-25 | 2020-01-10 | 上海利尔耐火材料有限公司 | Preparation method of novel mullite-combined light castable |
| CN111995429A (en) * | 2020-08-05 | 2020-11-27 | 河南好运祥耐材有限公司 | Ultra-light fire-resistant heat-insulating material |
-
2022
- 2022-06-15 CN CN202210674717.9A patent/CN114874018B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114874018A (en) | 2022-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105254323B (en) | A kind of micropore corundum-mullite ceramics separation-membrane support and preparation method thereof | |
| CN113372134A (en) | Microporous light silica brick and preparation method thereof | |
| CN108675743B (en) | Phosphogypsum-based thermal insulation mortar and preparation method thereof | |
| CN110590346A (en) | High-heat-conductivity wear-resistant material for circulating fluidized bed boiler | |
| CN105503209B (en) | A kind of mullite lightweight thermal insulation brick based on flint clay and preparation method thereof | |
| CN107586102A (en) | A kind of granite waste stone dust foamed ceramics and preparation method thereof | |
| CN107573098A (en) | A kind of lightweight castable for sintering ignition furnace | |
| CN107337462A (en) | A kind of sintered refractory block and preparation method thereof | |
| CN111393050A (en) | Gamma-C2Preparation method of S-based gel material | |
| CN111099901A (en) | Mullite refractory brick with high thermal shock resistance and production method thereof | |
| CN110452007A (en) | A kind of preparation method of hollow magnesium aluminate spinel whisker skeletal porous ceramics | |
| CN106631073A (en) | High-strength alkali-resistant brick | |
| CN106187236A (en) | Flint clay composite refractory brick and its preparation method and application | |
| CN101781919A (en) | Low heat conduction light heat insulating silica brick | |
| CN111018507A (en) | Preparation method of high-temperature electric furnace heat insulation porous ceramic lining | |
| CN108395248A (en) | A kind of preparation method of silicon carbide ceramics heat exchange pipe and its product obtained | |
| CN106699202A (en) | Anti-oxidative refractory brick and preparation method thereof | |
| CN114874018B (en) | Heat-preserving energy-saving high-temperature refractory material for industrial kiln and preparation method thereof | |
| CN104140233B (en) | A kind of low iron heat insulating casting material of 1200 DEG C of levels used for industrial furnace and preparation method | |
| CN108840659A (en) | A kind of corrosion-resistant light fire brick and preparation method thereof | |
| CN106565251B (en) | High-strength light refractory fiber and preparation method thereof | |
| CN106396700A (en) | Production method of corundum composite polycrystalline mullite fiber light bricks | |
| CN106495708A (en) | High refractory brick of a kind of refractoriness under load and preparation method thereof | |
| CN108285350B (en) | Ternary composite silicon carbide refractory material and preparation method thereof | |
| CN106242542A (en) | Mullite composite refractory brick and its preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
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 |