CN113480296B - Modified refractory brick with high thermal shock stability - Google Patents
Modified refractory brick with high thermal shock stability Download PDFInfo
- Publication number
- CN113480296B CN113480296B CN202110996762.1A CN202110996762A CN113480296B CN 113480296 B CN113480296 B CN 113480296B CN 202110996762 A CN202110996762 A CN 202110996762A CN 113480296 B CN113480296 B CN 113480296B
- Authority
- CN
- China
- Prior art keywords
- powder
- auxiliary agent
- parts
- agent particles
- refractory brick
- 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
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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/106—Refractories from grain sized mixtures containing zirconium oxide or zircon (ZrSiO4)
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- 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
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
-
- 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
Abstract
The invention discloses a modified refractory brick with high thermal shock stability, which is prepared from a liquid binder and a solid mixture, wherein the solid mixture comprises bauxite clinker particles, silicon carbide powder, electric white corundum powder, silica ultrafine powder, zirconia micropowder and auxiliary agent particles obtained by primary sintering and crushing; the raw materials of the auxiliary agent particles comprise cerium oxide micro powder or rare earth element oxide mixed materials. The invention has the beneficial effects that: adding a certain amount of additive into the auxiliary agent containing the cerium oxide micro powder, firstly sintering for the first time, crushing to obtain a granular material, then adding the granular material into the solid raw material of the refractory brick, and then sintering for the second time on the solid raw material, wherein the porosity is improved by the secondary sintering; the invention also combines cerium oxide micro powder and cerium oxide micro powder into a mixed material, and adds the mixed material into the raw materials of the auxiliary agent, thereby being beneficial to improving the comprehensive performance of the refractory material in heat conduction and thermal shock stability and reducing cracks generated in the using process of the refractory brick.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a modified high thermal shock stability refractory brick.
Background
The refractory material is an inorganic non-metallic material with refractoriness not lower than 1580 ℃. Refractoriness is the degree centigrade at which a sample of the refractory cone resists high temperatures without softening in the absence of a load. However, the definition of refractoriness alone does not fully describe the refractory material, and 1580 ℃ is not absolute. Materials that are now defined as materials whose physicochemical properties allow them to be used in high temperature environments are referred to as refractory materials. The refractory material is widely applied to the industrial fields of metallurgy, chemical industry, petroleum, mechanical manufacturing, silicate, power and the like, and the use amount in the metallurgical industry is the largest, and accounts for 50% -60% of the total output.
The refractory materials are of various varieties and different purposes, and need to be classified scientifically, and the refractory materials are classified by a plurality of methods, including a chemical property classification method, a chemical mineral composition classification method, a production process classification method, a material form classification method and the like. Classification by chemical mineral composition: silicon (silicon oxide), aluminum silicate, corundum, magnesium calcium, aluminum magnesium, magnesium silicon, carbon composite refractory material, zirconium refractory material and special refractory material.
The refractory material belongs to inorganic nonmetal, the mechanical toughness of the refractory material is poor, although the refractory material is hardly required to move in the using process, the poor mechanical toughness of the refractory material also influences the thermal shock resistance of the refractory material at high temperature, and the refractory material is easy to crack, peel and reduce the strength under the action of expansion with heat and contraction with large temperature difference in gaps between rapid cooling and rapid heating and use, so that the service life of the refractory material is shortened; meanwhile, for the refractory products which need to be moved frequently, the poor mechanical toughness of the refractory products can greatly increase the damage rate of the refractory products, and the common use of the refractory products is influenced. The refractory material in the prior art has the advantages of high brittleness, poor toughness, poor corrosion resistance, short service cycle, poor thermal shock resistance in the process of quenching and sudden heating, and easy cracking.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a modified refractory brick with high thermal shock resistance.
The purpose of the invention is realized by the following technical scheme: a modified refractory brick with high thermal shock stability comprises a liquid binder and a solid mixture, wherein the solid mixture comprises bauxite clinker particles, silicon carbide powder, electric white corundum powder, silica ultrafine powder, zirconia micropowder and auxiliary agent particles obtained by primary sintering and crushing; the raw materials of the auxiliary agent particles comprise cerium oxide micro powder or rare earth element oxide mixed materials;
further, the rare earth element oxide mixed material comprises cerium oxide and cerium oxide with the weight ratio of 3:2-2:1;
further, according to the parts by weight, the solid raw materials comprise 35-55 parts of bauxite clinker, 10-20 parts of silicon carbide powder, 5-15 parts of fused white corundum, 3-5 parts of silicon dioxide superfine powder, 5-10 parts of zirconia micropowder and 15-25 parts of auxiliary agent particles; the raw materials of the auxiliary agent particles comprise 5-10 parts of cerium oxide micro powder or 5-10 parts of mixed rare earth element oxides;
furthermore, the raw materials of the auxiliary agent particles also comprise one or more of Guangxi white mud, lignin, mullite, fused quartz stone, alumina micro powder and zirconia micro powder;
furthermore, the raw material of the auxiliary agent particles also comprises titanium carbide;
further, the particle size of the cerium oxide micro powder is 10um-1000nm;
further, the particle size of the bauxite clinker particles is 2-4mm; the particle size of the auxiliary agent particles is 100-1000nm;
further, the silicon carbide powder is sieved by a 200-mesh sieve, and the electric melting white corundum powder is sieved by a 325-mesh sieve;
further, the particle size of the silica submicron powder is less than or equal to 0.3um; the particle size of the zirconia micro powder is 50-100um;
the further technical proposal is that the modified refractory brick with high thermal shock stability is prepared by the following steps:
(1) Uniformly mixing raw materials of the auxiliary agent particles, and sintering at 1200-1700 ℃ in an oxygen-rich environment by taking air as a combustion-supporting medium to obtain a primary sintered product;
(2) Crushing and sieving the primary sintered product to obtain auxiliary agent particles;
(3) Mixing and grinding a liquid binder, auxiliary agent particles, bauxite clinker particles, silicon carbide powder, fused white corundum powder, silica ultrafine powder and zirconia ultrafine powder for molding;
(4) And (3) drying the formed green body at 50-150 ℃, putting into a kiln, firing at 1500 ℃ for 20-24h, and cooling along with the kiln to obtain the modified high thermal shock stability refractory brick.
The invention has the following advantages: according to the invention, the auxiliary agent containing the rare earth element oxide cerium oxide or the rare earth element oxide mixed material is firstly sintered for the first time, and is crushed to obtain the granular material, and then the granular material is added into the solid raw material of the refractory brick, and the solid raw material is sintered for the second time, so that the porosity is improved by the secondary sintering; and the rare earth element oxide is sintered for two times before and after the sintering, so that the thermal conductivity is favorably improved. According to the invention, different rare earth element oxides are mixed and added into the auxiliary raw materials, so that different rare earth element oxides can be combined, the comprehensive performance of the refractory material on heat conduction and compression resistance can be improved, and cracks generated in the using process of the refractory brick can be reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings.
Thus, the following detailed description of embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Example 1: a modified refractory brick with high thermal shock stability comprises a liquid binder and a solid mixture, wherein the solid mixture comprises bauxite clinker particles, silicon carbide powder, fused white corundum powder, superfine silica powder, superfine zirconia powder and auxiliary agent particles obtained by primary sintering and crushing; the raw materials of the auxiliary agent particles comprise cerium oxide micro powder or rare earth element oxide mixed materials;
the rare earth element oxide mixed material comprises cerium oxide and cerium oxide with the weight ratio of 3:2-2:1;
according to parts by weight, the solid raw materials comprise 35-55 parts of bauxite clinker, 10-20 parts of silicon carbide powder, 5-15 parts of fused white corundum, 3-5 parts of silica ultrafine powder, 5-10 parts of zirconia micropowder and 15-25 parts of auxiliary agent particles; the raw materials of the auxiliary agent particles comprise 5-10 parts of cerium oxide micro powder or 5-10 parts of rare earth element oxide mixed materials;
the raw materials of the auxiliary agent particles also comprise one or more of Guangxi white mud, lignin, mullite, fused quartz stone, alumina micro powder and zirconia micro powder;
the raw material of the auxiliary agent particles also comprises titanium carbide;
the particle size of the cerium oxide micro powder is 10um-1000nm;
the particle size of the bauxite clinker particles is 2-4mm; the particle size of the auxiliary agent particles is 100nm-1000nm;
the carborundum powder passes through a 200-mesh sieve, and the electrofused white corundum powder passes through a 325-mesh sieve;
the grain diameter of the silicon dioxide superfine powder is less than or equal to 0.3um; the particle size of the zirconia micro powder is 50-100um;
the modified refractory brick with high thermal shock resistance is prepared by the following steps:
(1) Uniformly mixing raw materials of the auxiliary agent particles, and sintering at 1200-1700 ℃ in an oxygen-rich environment by taking air as a combustion-supporting medium to obtain a primary sintered product;
(2) Crushing and sieving the primary sintered product to obtain auxiliary agent particles;
(3) Mixing and grinding the liquid binder, the auxiliary agent particles, the bauxite clinker particles, the silicon carbide powder, the fused white corundum powder, the superfine silicon dioxide powder and the superfine zirconia powder for molding;
(4) And (3) drying the formed green body at 50-150 ℃, putting into a kiln, firing at 1500 ℃ for 20-24h, and cooling along with the kiln to obtain the modified high thermal shock stability refractory brick.
The invention firstly sinters the auxiliary agent containing rare earth element oxide cerium oxide or rare earth element oxide mixed material for one time, and the sintering aid or additive which can be added during the first sintering is as follows: white clay, suzhou clay and other soft clay, or mullite-aluminum bi-lightweight and fused quartz; crushing to obtain a granular material, adding the granular material into a solid raw material of the refractory brick, and performing secondary sintering on the solid raw material again, wherein the secondary sintering is favorable for improving the porosity and the spalling times; and the rare earth element oxide is sintered for two times before and after the sintering, so that the thermal conductivity is favorably improved. According to the invention, different rare earth element oxides are mixed and added into the auxiliary raw materials, so that different rare earth element oxides can be combined, the comprehensive performance of the refractory material on heat conduction and compression resistance can be improved, and cracks generated in the using process of the refractory brick can be reduced.
Example 2: a modified refractory brick with high thermal shock stability comprises a liquid binder and a solid mixture, wherein the solid mixture comprises bauxite clinker particles, silicon carbide powder, electric white corundum powder, silica ultrafine powder, zirconia micropowder and auxiliary agent particles obtained by primary sintering and crushing; the raw materials of the auxiliary agent particles comprise cerium oxide micro powder or rare earth element oxide mixed materials;
the rare earth element oxide mixed material comprises cerium oxide and cerium oxide with the weight ratio of 3:2-2:1;
according to parts by weight, the solid raw materials comprise 35 parts of bauxite clinker, 10 parts of silicon carbide powder, 5 parts of fused white corundum, 3 parts of silicon dioxide superfine powder, 5 parts of zirconia micropowder and 15 parts of auxiliary agent particles; the raw materials of the auxiliary agent particles comprise 5 parts of cerium oxide micro powder;
the raw materials of the auxiliary agent particles also comprise one or more of Guangxi white mud, lignin, mullite, fused quartz stone, alumina micro powder and zirconia micro powder;
the raw material of the auxiliary agent particles also comprises titanium carbide;
the particle size of the cerium oxide micro powder is 10um;
the particle size of the bauxite clinker particles is 2mm; the particle size of the auxiliary agent particles is 100nm;
the silicon carbide powder is sieved by a 200-mesh sieve, and the electric melting white corundum powder is sieved by a 325-mesh sieve;
the particle size of the silicon dioxide superfine powder is 0.1um; the particle size of the zirconia micro powder is 50um;
the modified refractory brick with high thermal shock resistance is prepared by the following steps:
(1) Uniformly mixing raw materials of the auxiliary agent particles, and sintering at 1200-1700 ℃ in an oxygen-rich environment by taking air as a combustion-supporting medium to obtain a primary sintered product;
(2) Crushing and sieving the primary sintered product to obtain auxiliary agent particles;
(3) Mixing and grinding a liquid binder, auxiliary agent particles, bauxite clinker particles, silicon carbide powder, fused white corundum powder, silica ultrafine powder and zirconia ultrafine powder for molding;
(4) And (3) drying the formed green body at 50-150 ℃, putting into a kiln, firing at 1500 ℃ for 20-24h, and cooling along with the kiln to obtain the modified high thermal shock stability refractory brick.
Example 3: a modified refractory brick with high thermal shock stability comprises a liquid binder and a solid mixture, wherein the solid mixture comprises bauxite clinker particles, silicon carbide powder, fused white corundum powder, superfine silica powder, superfine zirconia powder and auxiliary agent particles obtained by primary sintering and crushing; the raw materials of the auxiliary agent particles comprise cerium oxide micro powder or rare earth element oxide mixed materials;
the rare earth element oxide mixed material comprises cerium oxide and cerium oxide with the weight ratio of 3:2;
the solid raw materials comprise 55 parts of bauxite clinker, 20 parts of silicon carbide powder, 15 parts of electric smelting white corundum, 5 parts of silicon dioxide superfine powder, 10 parts of zirconia micropowder and 25 parts of auxiliary agent particles in parts by weight; the raw materials of the auxiliary agent particles comprise 10 parts of rare earth element oxide mixed materials;
the raw materials of the auxiliary agent particles also comprise one or more of Guangxi white mud, lignin, mullite, fused quartz stone, alumina micro powder and zirconia micro powder;
the raw material of the auxiliary agent particles also comprises titanium carbide;
the particle size of the cerium oxide micro powder is 1000nm;
the particle size of the bauxite clinker particles is 4mm; the particle size of the auxiliary agent particles is 1000nm;
the silicon carbide powder is sieved by a 200-mesh sieve, and the electric melting white corundum powder is sieved by a 325-mesh sieve;
the particle size of the silicon dioxide superfine powder is 0.3um; the grain size of the zirconia micro powder is 100um;
the modified refractory brick with high thermal shock resistance is prepared by the following steps:
(1) Uniformly mixing raw materials of the auxiliary agent particles, and sintering at 1200-1700 ℃ in an oxygen-rich environment by taking air as a combustion-supporting medium to obtain a primary sintered product;
(2) Crushing and sieving the primary sintered product to obtain auxiliary agent particles;
(3) Mixing and grinding a liquid binder, auxiliary agent particles, bauxite clinker particles, silicon carbide powder, fused white corundum powder, silica ultrafine powder and zirconia ultrafine powder for molding;
(4) And (3) drying the formed green body at 120 ℃, putting the green body into a kiln, firing the green body at 1500 ℃ for 20-24h, and cooling the green body along with the kiln to obtain the modified high thermal shock stability refractory brick.
Example 4: a modified refractory brick with high thermal shock stability comprises a liquid binder and a solid mixture, wherein the solid mixture comprises bauxite clinker particles, silicon carbide powder, fused white corundum powder, superfine silica powder, superfine zirconia powder and auxiliary agent particles obtained by primary sintering and crushing; the raw materials of the auxiliary agent particles comprise cerium oxide micro powder or rare earth element oxide mixed materials;
the rare earth element oxide mixed material comprises cerium oxide and cerium oxide with the weight ratio of 2:1;
according to parts by weight, the solid raw materials comprise 40 parts of bauxite clinker, 18 parts of silicon carbide powder, 15 parts of fused white corundum, 4 parts of silica ultrafine powder, 6 parts of zirconia micropowder and 20 parts of auxiliary agent particles; the raw materials of the auxiliary agent particles comprise 7 parts of rare earth element oxide mixed materials;
the raw materials of the auxiliary agent particles also comprise one or more of Guangxi white mud, lignin, mullite, fused quartz stone, alumina micro powder and zirconia micro powder;
the raw material of the auxiliary agent particles also comprises titanium carbide;
the particle size of the cerium oxide micro powder is 500nm;
the particle size of the bauxite clinker particles is 4mm; the particle size of the auxiliary agent particles is 600nm;
the silicon carbide powder is sieved by a 200-mesh sieve, and the electric melting white corundum powder is sieved by a 325-mesh sieve;
the particle size of the silicon dioxide superfine powder is 0.3um; the particle size of the zirconia micro powder is 65um;
the modified refractory brick with high thermal shock resistance is prepared by the following steps:
(1) Uniformly mixing raw materials of the auxiliary agent particles, and sintering at 1200-1700 ℃ in an oxygen-enriched environment by taking air as a combustion-supporting medium to obtain a primary sintered product;
(2) Crushing and sieving the primary sintered product to obtain auxiliary agent particles;
(3) Mixing and grinding the liquid binder, the auxiliary agent particles, the bauxite clinker particles, the silicon carbide powder, the fused white corundum powder, the superfine silicon dioxide powder and the superfine zirconia powder for molding;
(4) And (3) drying the formed green body at 120 ℃, putting the green body into a kiln, firing the green body at 1500 ℃ for 20-24h, and cooling the green body along with the kiln to obtain the modified high thermal shock stability refractory brick.
Example 5: the same preparation method as that of example 4 was used to prepare a refractory high-alumina brick, except that the raw material of the auxiliary agent particles included only 7 parts by weight of cerium oxide fine powder. A large amount of once-sintered particles containing substances such as cerium oxide and the like are uniformly distributed in the product, a firm thermal stress resistant structure is formed, the cerium oxide has the characteristics of high temperature stability and good toughness, and the diffusion of cracks in the brick is reduced, so that the aims of improving the product toughness and improving the thermal shock stability are fulfilled.
Example 6: the same preparation method as that of example 4 is adopted to prepare the refractory high-alumina brick, and the difference is only that the raw materials of the auxiliary agent particles further comprise 5-10 parts of cerium oxide micro powder and 1-20 parts of mullite according to parts by weight. Cerium oxide micropowder is added into the auxiliary agent particles, and a uniform solid solution phase is formed together under the action of mullite. This oxide fine powder can prevent the penetration of the melt into the refractory by covering the surface of the refractory particles. The solid solution of such a composite oxide is very stable, thereby maintaining a strong bond and not causing a reduction in mechanical strength.
Example 7: the same preparation method as that of example 5 is adopted to prepare the refractory high-alumina brick, and the difference is only that the raw materials of the auxiliary agent particles comprise 5 to 10 parts of cerium oxide micro powder, 0.1 to 10 parts of lignin, 0.1 to 0.2 part of fused quartz stone and 1 to 20 parts of mullite according to the parts by weight; on the basis of example 6, the auxiliary agent particles can only further comprise lignin and fused quartz stone, wherein the lignin is beneficial to improving the toughness, and the fused quartz stone further forms a uniform and stable solid solution.
Example 8: the same preparation method as that of example 5 is adopted to prepare the refractory high-alumina brick, except that the raw materials of the auxiliary agent particles comprise 5-10 parts by weight of cerium oxide micro powder, 2-5 parts by weight of aluminum oxide micro powder and 10-20 parts by weight of zirconium oxide micro powder. The zirconia and alumina micropowder can also cover the surface of the refractory particles and prevent the penetration of the melt into the refractory to form a very stable solid solution, thereby maintaining a strong bond and not causing a reduction in mechanical strength.
Example 9: a refractory high alumina brick was produced in the same manner as in example 5, except that the raw material for the adjuvant particles included 1-2 parts by weight of titanium carbide. Titanium carbide is used as an additive, and the rigidity and the strength of the refractory brick can be improved under the condition that the titanium carbide exists in a small amount.
Example 10: the performance test of the refractory brick is carried out by adopting different auxiliary agent particle raw material proportions.
Experimental group 1: the refractory brick prepared by the preparation method of example 5 was used.
Experimental group 2: the refractory brick prepared by the preparation method of example 6 was used.
Experimental group 3: the refractory brick prepared by the preparation method of example 7 was used.
Experimental group 4: the refractory brick prepared by the preparation method of example 8 was used.
Experimental group 5: the refractory brick prepared by the preparation method of example 9 was used.
Blank group: the refractory high-alumina brick produced in the same manner as in example 5 was obtained, except that the auxiliary particles were not added.
Control group: the refractory high alumina brick prepared in the same manner as in example 5 is different only in that the additive particles are directly mixed and crushed and then added to the solid mixture without primary sintering.
The performance of the refractory bricks obtained from the experimental groups 1-4, the control group and the blank group are shown in Table 1 below.
TABLE 1 results of performance tests on refractory bricks from experimental groups 1-4, control group and blank group
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.
Claims (7)
1. A modified refractory brick with high thermal shock stability is prepared from a liquid binder and a solid mixture, wherein the refractory brick is prepared by sintering a green body formed by the raw material in a kiln; the method is characterized in that: the solid mixture comprises bauxite clinker particles, silicon carbide powder, electric melting white corundum powder, silicon dioxide superfine powder, zirconia superfine powder and auxiliary agent particles obtained by primary sintering and crushing; the raw materials of the auxiliary agent particles comprise one or more of cerium oxide micro powder, guangxi white mud, lignin, mullite, fused quartz stone, alumina micro powder and zirconia micro powder; according to parts by weight, the solid raw materials comprise 35-55 parts of bauxite clinker, 10-20 parts of silicon carbide powder, 5-15 parts of fused white corundum, 3-5 parts of silica ultrafine powder, 5-10 parts of zirconia micropowder and 15-25 parts of auxiliary agent particles; the raw materials of the auxiliary agent particles comprise 5-10 parts of cerium oxide micro powder, 0.1-10 parts of lignin, 0.1-0.2 part of fused quartz stone and 1-20 parts of mullite; the auxiliary agent particles are obtained by uniformly mixing auxiliary agent particle raw materials, taking air as a combustion-supporting medium, and sintering at 1200-1700 ℃ in an oxygen-rich environment.
2. The modified refractory brick of claim 1, wherein: the raw material of the auxiliary agent particles also comprises titanium carbide.
3. The modified refractory brick of claim 1, wherein: the particle size of the cerium oxide micro powder is 10um-1000nm.
4. The modified refractory brick of claim 1, wherein: the particle size of the bauxite clinker particles is 2-4mm; the particle size of the auxiliary agent particles is 100-1000nm.
5. The modified refractory brick of claim 1, wherein: the silicon carbide powder is sieved by a 200-mesh sieve, and the electric melting white corundum powder is sieved by a 325-mesh sieve.
6. The modified refractory brick of claim 1, wherein: the grain diameter of the silicon dioxide superfine powder is less than or equal to 0.3um; the particle size of the zirconia micro powder is 50-100um.
7. The modified refractory brick of claim 1, prepared by the steps of:
(1) Uniformly mixing raw materials of the auxiliary agent particles, and sintering at 1200-1700 ℃ in an oxygen-rich environment by taking air as a combustion-supporting medium to obtain a primary sintered product;
(2) Crushing and sieving the primary sintered product to obtain auxiliary agent particles;
(3) Mixing and grinding the liquid binder, the auxiliary agent particles, the bauxite clinker particles, the silicon carbide powder, the fused white corundum powder, the superfine silicon dioxide powder and the superfine zirconia powder for molding;
(4) And (3) drying the formed green body at 50-150 ℃, putting into a kiln, firing at 1500 ℃ for 10-15h, and cooling along with the kiln to obtain the modified high thermal shock stability refractory brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996762.1A CN113480296B (en) | 2021-08-27 | 2021-08-27 | Modified refractory brick with high thermal shock stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996762.1A CN113480296B (en) | 2021-08-27 | 2021-08-27 | Modified refractory brick with high thermal shock stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113480296A CN113480296A (en) | 2021-10-08 |
| CN113480296B true CN113480296B (en) | 2023-03-03 |
Family
ID=77947148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110996762.1A Active CN113480296B (en) | 2021-08-27 | 2021-08-27 | Modified refractory brick with high thermal shock stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113480296B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06100359A (en) * | 1992-09-18 | 1994-04-12 | Toto Ltd | Production of ceramic sintering auxiliary and production of mullite ceramic using the same |
| CN102584288A (en) * | 2012-02-03 | 2012-07-18 | 郑州中本窑炉材料有限公司 | Silica corundum brick |
| WO2013030301A1 (en) * | 2011-09-02 | 2013-03-07 | Calderys France | Castable refractory composition |
| CN103755361A (en) * | 2013-12-20 | 2014-04-30 | 中钢集团洛阳耐火材料研究院有限公司 | Aluminum-chromium-silicon fireproof material |
| CN105236945A (en) * | 2015-10-19 | 2016-01-13 | 安徽宁火新材料有限公司 | High strength thermal shock resistance push plate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938922B (en) * | 2017-04-06 | 2020-07-24 | 郑州中建耐火材料有限公司 | Silicon corundum abrasive brick |
-
2021
- 2021-08-27 CN CN202110996762.1A patent/CN113480296B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06100359A (en) * | 1992-09-18 | 1994-04-12 | Toto Ltd | Production of ceramic sintering auxiliary and production of mullite ceramic using the same |
| WO2013030301A1 (en) * | 2011-09-02 | 2013-03-07 | Calderys France | Castable refractory composition |
| CN103930385A (en) * | 2011-09-02 | 2014-07-16 | 凯得力法国公司 | Castable refractory composition |
| CN102584288A (en) * | 2012-02-03 | 2012-07-18 | 郑州中本窑炉材料有限公司 | Silica corundum brick |
| CN103755361A (en) * | 2013-12-20 | 2014-04-30 | 中钢集团洛阳耐火材料研究院有限公司 | Aluminum-chromium-silicon fireproof material |
| CN105236945A (en) * | 2015-10-19 | 2016-01-13 | 安徽宁火新材料有限公司 | High strength thermal shock resistance push plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113480296A (en) | 2021-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109320219B (en) | High-performance aluminum-chromium refractory material and manufacturing method and application thereof | |
| CN108367993B (en) | Sintered refractory zircon composite material, method for the production thereof and use thereof | |
| CN100337987C (en) | Mullite silicon carbide refractory material for production of dry coke and its production | |
| CN103204692B (en) | Novel lightweight mullite brick and fabrication method thereof | |
| CN106145976B (en) | Andalusite-mullite-silicon carbide brick for cement kiln and preparation method thereof | |
| US4125407A (en) | Refractories which have dense-structure as well as spalling resistance and method for fabricating same | |
| CN109020520B (en) | Ceramic roller rod with thermal shock resistance and high-temperature creep resistance and preparation method thereof | |
| CN101891486A (en) | High thermal conductivity Sialon-SiC complex phase ceramic fireproof material for dry coke quenching furnace and production method thereof | |
| Pivinsky et al. | Cement-Free Refractory Concretes. Part 2. High-Alumina and Corundum Ceramic Concretes1 | |
| CN104844233A (en) | Special fire-proof material for combustion furnace and preparation method thereof | |
| CN107935575A (en) | High-purity low creep electric cast mullite brick and preparation method thereof | |
| CN110683851A (en) | Environment-friendly acid furnace lining dry type vibration material | |
| CN111704474A (en) | Mullite refractory castable for ultrahigh-temperature smelting | |
| CN110894162A (en) | Ultrahigh-temperature high-strength ceramic roller and preparation method thereof | |
| CN107935608A (en) | The method that zircon brick is prepared using compact zircon aggregate | |
| CN114671677B (en) | Energy-saving high-hardness ceramic tile and production process thereof | |
| CN111548171B (en) | Silica refractory mortar with excellent high-temperature performance | |
| CN113480296B (en) | Modified refractory brick with high thermal shock stability | |
| CN108285350B (en) | Ternary composite silicon carbide refractory material and preparation method thereof | |
| CN113526946B (en) | High-toughness modified silicon corundum brick | |
| CN106830690A (en) | Silicon nitride/the aluminium nitride of a kind of self-reinforcing toughness reinforcing/lanthanum barium Aluminous Silicate Glass-Ceramics trielement composite material and preparation method thereof | |
| CN114262231B (en) | Lining refractory material for lime kiln and preparation method thereof | |
| CN112279657B (en) | Lightweight bauxite-based refractory brick and preparation method thereof | |
| CN112028645A (en) | High-performance sialon corundum composite silicon carbide castable and preparation method thereof | |
| CN104671803B (en) | A kind of metal high-chrome brick and its preparation method |
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 |