CN113200742A - Heat-insulating composite wear-resistant brick - Google Patents
Heat-insulating composite wear-resistant brick Download PDFInfo
- Publication number
- CN113200742A CN113200742A CN202110496108.4A CN202110496108A CN113200742A CN 113200742 A CN113200742 A CN 113200742A CN 202110496108 A CN202110496108 A CN 202110496108A CN 113200742 A CN113200742 A CN 113200742A
- Authority
- CN
- China
- Prior art keywords
- heat
- resistant
- brick
- wear
- composite wear
- 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.)
- Pending
Links
- 239000011449 brick Substances 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 20
- 239000011029 spinel Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000011777 magnesium Substances 0.000 claims abstract description 14
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 14
- -1 magnesium aluminate Chemical class 0.000 claims abstract description 14
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000007767 bonding agent Substances 0.000 claims abstract description 10
- 239000011325 microbead Substances 0.000 claims abstract description 5
- 239000002671 adjuvant Substances 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 11
- 239000011805 ball Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 239000010451 perlite Substances 0.000 claims description 5
- 235000019362 perlite Nutrition 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000013081 microcrystal Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 239000011806 microball Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 22
- 239000000126 substance Substances 0.000 abstract description 13
- 239000004568 cement Substances 0.000 abstract description 8
- 239000012774 insulation material Substances 0.000 abstract description 6
- 238000010304 firing Methods 0.000 abstract description 3
- 239000008187 granular material Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 229910052573 porcelain Inorganic materials 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 229910001570 bauxite Inorganic materials 0.000 description 5
- 239000000378 calcium silicate Substances 0.000 description 5
- 229910052918 calcium silicate Inorganic materials 0.000 description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009970 fire resistant effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound 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 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
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
- C04B35/44—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 aluminates
- C04B35/443—Magnesium aluminate spinel
-
- 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
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
- C04B35/62675—Thermal treatment of powders or mixtures thereof other than sintering characterised by the treatment temperature
-
- 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
- C04B2235/3418—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
- C04B2235/34—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
- C04B2235/36—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
- C04B2235/02—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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to the technical field of refractory brick production, and discloses a heat-insulating composite wear-resistant brick, which comprises the following components: main raw materials (in weight): 70-75% of magnesium aluminate spinel, 20-25% of alumina hollow sphere and 5-10% of silicon carbide; adjuvants (in weight): 10-15% of ceramsite and 7-8% of expanded and vitrified micro-beads. The heat-insulating composite wear-resistant brick provided by the invention has the advantages that the wear-resistant layer is prepared from spinel and alumina hollow spheres and is matched with a chemical bonding agent; the heat insulation layer adopts porcelain granules and vitrified micro bubbles which are matched with a chemical bonding agent; the heat insulation and refractory material is prepared by adopting a separate stirring and mixing process and organically combining heat insulation performance and refractory performance through molding and high-temperature firing; the wear-resistant, high-temperature-resistant and heat-insulating integrated machine has the advantages that the machine integrates wear resistance, high temperature resistance and heat insulation, can greatly improve the running time of equipment, saves energy, keeps warm, resists high temperature, is used for a long time, saves energy and reduces consumption; can meet the requirements of tertiary air pipe and inner wall of preheater cylinder for heat insulation and fire resistance in cement production process.
Description
Technical Field
The invention relates to the technical field of refractory brick production, in particular to a heat-insulating composite wear-resistant brick.
Background
Along with the national requirements on resource protection and efficient utilization of resources, the nation develops a series of energy-saving and environment-friendly laws and regulations; the cement industry is a high energy consumption industry, so that the out-dated production process is eliminated, and the pressure is higher; the development direction of cement industry is large-scale, automatic, intelligent, energy-saving and environment-friendly. If the capacity below 2500 tons of clinker per day is eliminated, the capacity above 5000 tons of clinker per day is popularized. Along with the increase of the productivity, the diameters of the tertiary air pipe and the preheater are increased; in the traditional heat insulation and fire-resistant heat preservation process of the tertiary air pipe and the preheater cylinder, the abrasion resistance of refractory bricks is low; the easy pulverization and low high-temperature strength of the calcium silicate board can not meet the production requirement.
The wear-resistant layer of the heat-insulating composite wear-resistant brick is prepared by mixing spinel and alumina hollow spheres and adding a chemical bonding agent; the heat insulation layer adopts porcelain granules and vitrified micro bubbles which are matched with a chemical bonding agent; the heat-insulating and fire-resisting material is made up by adopting separate stirring and mixing-grinding process, forming and high-temp. firing. The cement mortar has excellent physical and chemical properties of low heat conductivity coefficient, high mechanical strength, good wear resistance and strong erosion resistance, and can well meet the requirements of tertiary air pipes and inner walls of preheater cylinders on heat insulation and fire resistance in the cement production process.
The inner wall of the tertiary air duct of the cement kiln generally adopts a two-layer masonry mode of an inner layer refractory brick and an outer layer calcium silicate board to carry out barrel protection; by adopting the design structure, after the silicon-calcium plate is used for a period of time, the silicon-calcium plate is easy to pulverize and fall off, so that the phenomena of swabbing and collapse of the refractory bricks at the top of the tertiary air duct are caused. After the calcium silicate board is pulverized and detached, the heat insulation layer disappears, the temperature of the outer surface of the cylinder body is increased, the heat dissipation of the outer surface of the cylinder body is intensified, and the tertiary wind heat loss is increased.
Disclosure of Invention
Technical problem to be solved
The wear-resistant layer of the heat-insulating composite wear-resistant brick provided by the invention is prepared from spinel and alumina hollow spheres and a chemical bonding agent; the heat insulation layer adopts porcelain granules and vitrified micro bubbles which are matched with a chemical bonding agent; the heat-insulating and fire-resisting material is made up by adopting separate stirring and mixing-grinding process, forming and high-temp. firing. The heat insulation performance and the fire resistance performance are organically combined; the wear-resistant heat-insulating heat-preserving brick integrates wear resistance, high temperature resistance and heat insulation, can greatly improve the running time of equipment, saves energy, preserves heat, resists high temperature, is used for a long time, saves energy and reduces consumption.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that: the heat-insulating composite wear-resistant brick comprises the following components:
main raw materials (in weight): 70-75% of magnesium aluminate spinel, 20-25% of alumina hollow sphere and 5-10% of silicon carbide;
adjuvants (in weight): 10-15% of ceramsite and 7-8% of expanded and vitrified micro-beads;
reagents (in volume): 3-5mol/L of binding agent and 8-10mol/L of water reducing agent.
Preferably, the magnesium aluminate spinel comprises the following components (by weight): greater than or equal to 76 percent of high-quality alumina Al203 and greater than or equal to 95 percent of light-burned magnesium powder MgO.
Preferably, the sintering method of the magnesium aluminate spinel comprises the following steps:
1) putting high-quality alumina and light-burned magnesium powder into a ball mill according to a proportion and grinding into fine powder of 180 meshes;
2) and (3) feeding the raw materials in the step (1) into a high-temperature kiln, sintering at a high temperature of not less than 1800 ℃ and calcining for 48 hours.
Preferably, the alumina hollow spheres are formed by melting and blowing industrial alumina in an electric furnace, and the crystal form is a-Al2O3 microcrystal.
Preferably, the expanded and vitrified small balls are made of perlite particles by a multistage silicon carbide electric heating tube type production process.
A preparation method of a heat-insulating composite wear-resistant brick comprises the following specific steps:
1) putting the dried ceramsite and the expanded and vitrified micro balls into a ball mill according to a proportion, grinding into 180-mesh fine powder, and putting into a warehouse for storage;
2) putting the prepared magnesium aluminate spinel, the prepared alumina hollow spheres, the silicon carbide and the materials prepared in the step 1 into a stirrer in proportion, and stirring for 10-15 min;
3) sequentially adding the admixture, the bonding agent and the water reducing agent in the stirring process in the step 2, and continuously stirring for 30min to prepare a material;
4) molding the material obtained in the step 3 through a mold, and then putting the molded material into a drying kiln for drying for 24-72 hours;
5) and (3) placing the model manufactured in the step (4) into a high-temperature kiln, sintering at the high temperature of not less than 1500 ℃, calcining for 72 hours, cooling after 72 hours, and cooling and taking out the finished product.
(III) advantageous effects
Compared with the prior art, the wear-resistant part of the heat-insulating composite wear-resistant brick provided by the embodiment of the invention fully utilizes the performances of corrosion resistance, stripping resistance, slag resistance, good thermal shock stability, high temperature resistance and the like of spinel; the low heat conductivity coefficient, high fire resistance and high strength of the alumina hollow sphere are utilized; the high wear resistance and high fire resistance of the silicon carbide are utilized. The silica is oxidized at high temperature to form nascent state silica, which reacts with alumina to form mullite with stable high temperature volume on one hand, and forms glazed vitreous body on the surface of the refractory brick to form closed pores, thereby effectively preventing the refractory brick from being oxidized at high temperature.
The heat insulation part of the heat insulation composite wear-resistant brick fully utilizes the spherical appearance of the refractory ceramsite, has smooth and hard surface and honeycomb-shaped interior, and has the characteristics of low density, low heat conductivity and high strength; the expanded and vitrified micro bubbles are used for sealing micropores, the internal porous cavity structure is adopted, the surface is vitrified and sealed, the gloss is smooth, the physical and chemical properties are stable, and the advantages of light weight, heat insulation, fire resistance, high temperature resistance, aging resistance and low water absorption rate are achieved; the heat-insulating and fire-resistant composite material with low heat conduction, high wear resistance and high strength is prepared through reasonable gradation.
Production of the heat-insulating composite wear-resistant brick: the silica-alumina sol is used as a bonding agent, the wear-resistant part and the heat-insulating part are separately prepared, a corrugated partition plate is adopted in a forming grinding tool, and the two parts are separately fed and formed at high pressure. And an intermediate layer with firm bonding is formed at the fireproof and heat insulation part.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.
Drawings
FIG. 1 is a structural diagram of a raw refractory brick provided by the present invention;
FIG. 2 is a schematic structural view of the heat-insulating composite wear-resistant brick provided by the invention;
fig. 3 is a schematic view of a processing flow structure of the heat-insulating composite wear-resistant brick provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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 creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the present invention provides an insulating composite wear-resistant brick, which comprises the following components:
main raw materials (in weight): 70-75% of magnesium aluminate spinel, 20-25% of alumina hollow sphere and 5-10% of silicon carbide;
adjuvants (in weight): 10-15% of ceramsite and 7-8% of expanded and vitrified micro-beads;
reagents (in volume): 3-5mol/L of binding agent and 8-10mol/L of water reducing agent.
Further, the magnesium aluminate spinel in the embodiment comprises the following components (by weight): greater than or equal to 76 percent of high-quality alumina Al203 and greater than or equal to 95 percent of light-burned magnesium powder MgO.
The specific sintering method comprises the following steps:
1) putting high-quality alumina and light-burned magnesium powder into a ball mill according to a proportion and grinding into fine powder of 180 meshes;
2) and (3) feeding the raw materials in the step (1) into a high-temperature kiln, sintering at a high temperature of not less than 1800 ℃ and calcining for 48 hours.
The alumina hollow spheres in the embodiment are prepared by melting and blowing industrial alumina in an electric furnace, and the crystal form is a-Al2O3 microcrystal.
The expanded and vitrified micro bubbles in the embodiment are prepared by perlite particles through a multistage silicon carbide electric heating tube type production process.
Further, as a further technical solution provided by the present invention: the material has the following characteristics, so that the heat-insulating composite wear-resistant brick prepared by the invention has the characteristics of smooth and hard surface, honeycomb-shaped interior, small density, low heat conductivity and high strength; the expanded and vitrified micro bubbles are used for sealing micropores, the internal porous cavity structure is adopted, the surface is vitrified and sealed, the gloss is smooth, the physical and chemical properties are stable, and the advantages of light weight, heat insulation, fire resistance, high temperature resistance, aging resistance and low water absorption rate are achieved; the heat-insulating and fire-resistant composite material with low heat conduction, high wear resistance and high strength is prepared through reasonable gradation. The method comprises the following specific steps:
alumino-alumina based sintered magnesium aluminate spinel: the high-quality alumina with Al203 being equal to or larger than 76 percent and the high-quality light-burned magnesium powder with MgO being equal to or larger than 95 percent are subjected to multistage homogenization and are sintered at the high temperature being equal to or larger than 1800 ℃ in an ultrahigh aluminum magnesium spinel tunnel kiln. The material has the advantages of large volume density, high mineral phase content, good crystal grain development, uniform structure and stable quality. The magnesium aluminate spinel has the advantages of good erosion resistance, corrosion resistance, stripping resistance, abrasion resistance, good thermal shock stability, high temperature resistance and the like. Is an ideal raw material for producing refractory materials.
The magnesia-alumina spinel brick made of magnesia-chrome sand is used for a cement rotary kiln, thereby not only avoiding chrome pollution, but also having good spalling resistance.
Alumina hollow spheres: the crystal form of the alpha-Al 2O3 microcrystal is formed by melting and blowing industrial alumina in an electric furnace. The alumina hollow ball is used as main body, can be made into various products, the maximum service temperature is 1800 ℃, the mechanical strength of the product is high, the product is several times of that of a common light product, the volume density is only one half of that of a corundum product, and the product is a novel high-temperature heat-insulating material.
Silicon carbide: the refractory temperature is 2700 ℃, the chemical property is stable, the heat conductivity coefficient is high, the thermal expansion coefficient is small, and the wear resistance is good; the mohs hardness is grade 9.5, second only to the hardest diamond in the world (grade 10). Silicon carbide is readily oxidized at high temperatures to form silicon dioxide.
Ceramsite: is a lightweight aggregate produced by foaming in a rotary kiln. It has the advantages of spherical shape, smooth and hard surface, honeycomb shape inside, low density, low heat conductivity, high strength, etc. In the production industry of refractory materials, ceramsite is mainly used as aggregate of heat insulation materials.
Expanding and vitrifying the micro-beads: is inorganic vitreous mineral material. The perlite particles are prepared by a multistage silicon carbide electric heating tube type production process and are irregular spheroid particles; the interior of the glass tube is of a porous cavity structure, the surface of the glass tube is vitrified and sealed, the gloss is smooth, and the physical and chemical properties are stable; the light-weight, heat-insulating, fireproof, high-temperature-resistant, anti-aging and low-water-absorption-rate lightweight aggregate has the excellent characteristics of light weight, heat insulation, fire resistance, high temperature resistance, aging resistance, low water absorption and the like, and can replace a plurality of traditional lightweight aggregates such as fly ash floating beads, expanded perlite, polyphenyl particles and the like to be applied to different products. Is an environment-friendly high-performance novel inorganic heat-insulating material.
Example 1
The invention provides a preparation method of a heat-insulating composite wear-resistant brick, which comprises the following steps:
1) putting the dried ceramsite and the expanded and vitrified micro balls into a ball mill according to a proportion, grinding into 180-mesh fine powder, and putting into a warehouse for storage;
2) putting the prepared magnesium aluminate spinel, the prepared alumina hollow spheres, the silicon carbide and the materials prepared in the step 1 into a stirrer in proportion, and stirring for 10-15 min;
3) sequentially adding the admixture, the bonding agent and the water reducing agent in the stirring process in the step 2, and continuously stirring for 30min to prepare a material;
4) molding the material obtained in the step 3 through a mold, and then putting the molded material into a drying kiln for drying for 24-72 hours;
5) and (3) placing the model manufactured in the step (4) into a high-temperature kiln, sintering at the high temperature of not less than 1500 ℃, calcining for 72 hours, cooling after 72 hours, and cooling and taking out the finished product.
Example 2
The production method of the traditional high-aluminum refractory brick comprises the following steps:
1. firstly, raw high-alumina bauxite is put into a high-temperature kiln to be calcined for 48 hours, the temperature is controlled to be 1500 ℃ to 1600 ℃, and the calcined raw high-alumina bauxite is cooled and crushed for standby application.
2. Crushing and crushing the calcined bauxite, and screening to obtain 5-3, 3-1, 1-0-level aggregate. And grinding the oversize material into 180-mesh fine powder in a ball mill, and putting the fine powder into a storage bin for later use. The clay raw material is dried and then ground into 180-mesh fine powder for later use in a ball mill.
3. Weighing 70-80% of bauxite chamotte and 20-30% of bauxite raw material fine powder according to the weight percentage, putting into a stirrer, uniformly stirring, then performing compression molding by using a special mold, putting into a drying kiln, drying for 24-72 hours, finally calcining for 72 hours in a high-temperature kiln, controlling the highest temperature at 1500 ℃, and cooling and discharging from the kiln to obtain the common high-alumina refractory brick.
As the cement kiln production line in China before 2010 mainly adopts 2500 tons of clinker/day novel dry kiln, the diameter size of the tertiary air pipe is 2300, and the heat-preservation fireproof original design of the inner wall of the tertiary air pipe is as follows: the composite masonry was made with 114 mm thick refractory bricks and 114 mm calcium silicate board. The existing cement production line mainly adopts a novel dry kiln with clinker of more than 5000 tons per day, the diameter size of a tertiary air pipe cylinder of the novel dry kiln with the clinker of 5000 tons per day is 3200 at present, and the refractory bricks with the original thickness of 114 mm and calcium silicate boards with the original thickness of 114 mm can not meet the installation requirement of the existing large-diameter equipment cylinder, so that the refractory bricks are easy to stick out or collapse, and the production cycle of the kiln is influenced. The conventional high-aluminum refractory brick has the following disadvantages: small brick size, high heat conductivity, low mechanical strength, high porosity, high water absorption and no wear resistance. When the heat insulation material is used on a tertiary air pipe, the surface temperature of the cylinder body is high and the energy consumption is increased due to the fact that the heat insulation material does not have heat insulation performance; and the brick type structure does not resist extreme cold and extreme heat, and the refractory brick is easy to stick out or collapse when the working condition temperature fluctuates greatly. Is only suitable for the original production technical requirements, but can not meet the requirements of the prior production technology.
For further discussion of the modified characteristics of the heat-insulating composite wear-resistant brick provided by the invention and the traditional high-alumina refractory brick, the following parameters are strictly detected and analyzed by performing experiments on the heat-insulating composite wear-resistant brick:
(1) chemical components of raw materials, granularity composition, water and additives.
(2) Detailed formula record and process parameter record.
(3) Mixing and grinding time, pug moisture, pressing times and the like.
(4) Recording the size, weight and appearance condition of the semi-finished product.
(5) And recording the temperature and humidity of the drying kiln.
(6) And recording the size, the body density and the residual moisture of the dried green bricks.
(7) And recording the height and the density of the kiln.
The technical indexes of the traditional product are as follows:
the technical indexes of the product are as follows:
| item | Index (I) |
| Apparent porosity (%) | ≥30 |
| Bulk Density (g/cm3) | 2.5/0.6 |
| Normal temperature compressive strength (Mpa) | 45/10 |
| Coefficient of thermal conductivity (W/M. K) | 0.35 (thermal insulation end) |
Compared with the traditional high-alumina refractory brick, the heat-insulating composite wear-resistant brick provided by the invention has the advantages of high wear resistance, alkali corrosion resistance and low heat conduction according to the data comparison, and can save energy by more than 30% compared with the traditional product. The surface is smooth and hard, the interior is honeycomb-shaped, and the material has the characteristics of small density, low heat conductivity and high strength; the expanded and vitrified micro bubbles are used for sealing micropores, the internal porous cavity structure is adopted, the surface is vitrified and sealed, the gloss is smooth, the physical and chemical properties are stable, and the advantages of light weight, heat insulation, fire resistance, high temperature resistance, aging resistance and low water absorption rate are achieved; the heat-insulating and fire-resistant composite material with low heat conduction, high wear resistance and high strength is prepared through reasonable gradation. The traditional high-aluminum refractory brick has the advantages of small brick size, large heat conductivity coefficient, low mechanical strength, high porosity, large water absorption and no wear resistance. When the heat insulation material is used on a tertiary air pipe, the surface temperature of the cylinder body is high and the energy consumption is increased due to the fact that the heat insulation material does not have heat insulation performance; and the brick type structure does not resist extreme cold and extreme heat, and the refractory brick is easy to stick out or collapse when the working condition temperature fluctuates greatly. Is only suitable for the original production technical requirements, but can not meet the requirements of the prior production technology.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The heat-insulating composite wear-resistant brick is characterized by comprising the following components:
main raw materials (in weight): 70-75% of magnesium aluminate spinel, 20-25% of alumina hollow sphere and 5-10% of silicon carbide;
adjuvants (in weight): 10-15% of ceramsite and 7-8% of expanded and vitrified micro-beads;
reagents (in volume): 3-5mol/L of binding agent and 8-10mol/L of water reducing agent.
2. The insulated composite wear brick of claim 2, wherein the magnesium aluminate spinel comprises the following composition (by weight): greater than or equal to 76 percent of high-quality alumina Al203 and greater than or equal to 95 percent of light-burned magnesium powder MgO.
3. The insulated composite wear brick according to claim 2, wherein the magnesium aluminate spinel is sintered by the following steps:
1) putting high-quality alumina and light-burned magnesium powder into a ball mill according to a proportion and grinding into fine powder of 180 meshes;
2) and (3) feeding the raw materials in the step (1) into a high-temperature kiln, sintering at a high temperature of not less than 1800 ℃ and calcining for 48 hours.
4. The heat-insulating composite wear-resistant brick as claimed in claim 1, wherein the alumina hollow spheres are formed by melting and blowing industrial alumina in an electric furnace, and the crystal form is a-Al2O3 microcrystal.
5. The heat-insulating composite wear-resistant brick as claimed in claim 1, wherein the expanded and vitrified beads are made of perlite particles by a multistage silicon carbide electric heating tube type production process.
6. The preparation method of the heat-insulating composite wear-resistant brick is characterized by comprising the following steps of:
1) putting the dried ceramsite and the expanded and vitrified micro balls into a ball mill according to a proportion, grinding into 180-mesh fine powder, and putting into a warehouse for storage;
2) putting the prepared magnesium aluminate spinel, the prepared alumina hollow spheres, the silicon carbide and the materials prepared in the step 1 into a stirrer in proportion, and stirring for 10-15 min;
3) sequentially adding the admixture, the bonding agent and the water reducing agent in the stirring process in the step 2, and continuously stirring for 30min to prepare a material;
4) molding the material obtained in the step 3 through a mold, and then putting the molded material into a drying kiln for drying for 24-72 hours;
5) and (3) placing the model manufactured in the step (4) into a high-temperature kiln, sintering at the high temperature of not less than 1500 ℃, calcining for 72 hours, cooling after 72 hours, and cooling and taking out the finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496108.4A CN113200742A (en) | 2021-05-07 | 2021-05-07 | Heat-insulating composite wear-resistant brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496108.4A CN113200742A (en) | 2021-05-07 | 2021-05-07 | Heat-insulating composite wear-resistant brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113200742A true CN113200742A (en) | 2021-08-03 |
Family
ID=77029120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110496108.4A Pending CN113200742A (en) | 2021-05-07 | 2021-05-07 | Heat-insulating composite wear-resistant brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113200742A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117658604A (en) * | 2024-01-31 | 2024-03-08 | 江苏恒耐炉料集团有限公司 | Wear-resistant silicon mullite brick and manufacturing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1478904A (en) * | 1973-08-02 | 1977-07-06 | Otavi Minen Und Eisenbahn Ges | Ceramic insulating bricks |
| CN101857449A (en) * | 2010-06-07 | 2010-10-13 | 长兴盛旺锅炉耐火保温防腐工程有限公司 | Siliceous mullite structure-insulating integrated composite brick and preparation method thereof |
| CN105084915A (en) * | 2015-07-09 | 2015-11-25 | 长兴泓矿炉料有限公司 | Compound refractory material and preparation method thereof |
| CN105237018A (en) * | 2015-11-19 | 2016-01-13 | 长兴兴鹰新型耐火建材有限公司 | Abrasion-resistant anti-erosion pouring material for cement kiln tertiary air duct |
| CN105669221A (en) * | 2016-01-08 | 2016-06-15 | 浙江长兴久鑫耐火材料有限公司 | Composite refractory brick containing expanded and vitrified beads |
| CN109485439A (en) * | 2018-12-20 | 2019-03-19 | 无锡远能耐火材料有限公司 | The preparation method of low thermally conductive high abrasion silicon not compound heat-insulation brick |
-
2021
- 2021-05-07 CN CN202110496108.4A patent/CN113200742A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1478904A (en) * | 1973-08-02 | 1977-07-06 | Otavi Minen Und Eisenbahn Ges | Ceramic insulating bricks |
| CN101857449A (en) * | 2010-06-07 | 2010-10-13 | 长兴盛旺锅炉耐火保温防腐工程有限公司 | Siliceous mullite structure-insulating integrated composite brick and preparation method thereof |
| CN105084915A (en) * | 2015-07-09 | 2015-11-25 | 长兴泓矿炉料有限公司 | Compound refractory material and preparation method thereof |
| CN105237018A (en) * | 2015-11-19 | 2016-01-13 | 长兴兴鹰新型耐火建材有限公司 | Abrasion-resistant anti-erosion pouring material for cement kiln tertiary air duct |
| CN105669221A (en) * | 2016-01-08 | 2016-06-15 | 浙江长兴久鑫耐火材料有限公司 | Composite refractory brick containing expanded and vitrified beads |
| CN109485439A (en) * | 2018-12-20 | 2019-03-19 | 无锡远能耐火材料有限公司 | The preparation method of low thermally conductive high abrasion silicon not compound heat-insulation brick |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117658604A (en) * | 2024-01-31 | 2024-03-08 | 江苏恒耐炉料集团有限公司 | Wear-resistant silicon mullite brick and manufacturing method thereof |
| CN117658604B (en) * | 2024-01-31 | 2024-06-04 | 江苏恒耐炉料集团有限公司 | Wear-resistant silicon mullite brick and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101863675B (en) | High-alumina structure heat-insulation integrated composite brick and preparation method | |
| CN101857449B (en) | Siliceous mullite structure-insulating integrated composite brick and preparation method thereof | |
| WO2018006835A1 (en) | High temperature-resistant light-weight thermal-insulating material having duel porous structure and preparation method therefor | |
| CN101638324B (en) | Light porous heat-insulating refractory material and preparation method and applications thereof | |
| CN103332958B (en) | Foamed ceramic with gradient pore structure and preparation method thereof | |
| CN101768006B (en) | Lightweight refractory for glass smelting kiln | |
| CN101863673A (en) | Magnesia-alumina spinel structure heat insulation integral composite brick and preparation method thereof | |
| CN112374873B (en) | Composite chromium corundum brick and preparation process thereof | |
| CN108840710A (en) | Utilize the method for lithium tailing and steel slag tailing production foamed ceramic building thermal insulation material | |
| CN103130524A (en) | Energy-saving light cordierite-mullite kiln furnace material, kiln furnace and preparation method of material | |
| CN105198481A (en) | Method for utilizing Yellow River silt and red mud for preparing foaming ceramic heat insulating and preserving plate | |
| CN111099901A (en) | Mullite refractory brick with high thermal shock resistance and production method thereof | |
| CN101172832A (en) | Light high-strength unburned brick | |
| CN110105044B (en) | Light high-strength nano-scale microporous thermal insulation material | |
| CN113200742A (en) | Heat-insulating composite wear-resistant brick | |
| CN106631120A (en) | Straw-fiber and shale sintered microporous material and preparation method thereof | |
| CN104003680B (en) | Self-heat conserving masonry is built by laying bricks or stones and is used heat insulating mortar powder | |
| CN108017397A (en) | Refractory brick containing quartz sand and preparation method thereof | |
| CN113185311A (en) | Aluminum-silicon castable with aggregate proportion adjusted and preparation method thereof | |
| CN115073203B (en) | Foam ceramic wall material with good hanging function and preparation method thereof | |
| CN110937906A (en) | Safe and energy-saving smelting furnace body and smelting device adopting same | |
| CN106396637B (en) | Preparation method of light low-expansion porcelain building ceramic tile and product prepared by preparation method | |
| CN109369203A (en) | Density mullite brick and preparation method thereof in high intensity | |
| CN115435597A (en) | Preparation method of low-heat-conductivity multilayer composite magnesium aluminate spinel brick for rotary kiln | |
| CN112250467A (en) | Sepiolite aerated concrete block and preparation process thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210803 |
|
| RJ01 | Rejection of invention patent application after publication |