CN109534833A - A kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide brick - Google Patents
A kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide brick Download PDFInfo
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- CN109534833A CN109534833A CN201811617474.5A CN201811617474A CN109534833A CN 109534833 A CN109534833 A CN 109534833A CN 201811617474 A CN201811617474 A CN 201811617474A CN 109534833 A CN109534833 A CN 109534833A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- 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
- C04B35/16—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 silicates other than clay
- C04B35/18—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 silicates other than clay rich in aluminium oxide
- C04B35/185—Mullite 3Al2O3-2SiO2
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—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
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- 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
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- 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
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
A kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide, raw material components weight ratio are as follows: 5-2mm fused mullite 20-0%, 2-1mm fused mullite 30-10%, 1-0.088mm fused mullite 20-10%, < 0.088mm silicon carbide 15-10%, < 0.088mm plate diamond spar 20-10%, 20-15 μm of silicon powder 5-0%, mix the bonding agent of above-mentioned all total mass of raw material 3.5-1.5% outside.Bonding agent is any one of lignosulfonic acid magnesium, magnesium chloride solution or two kinds;The specific gravity of the bonding agent is 1.05~1.25.The high temperature resistance and resistance to chemical attack of invention product are excellent, are suitable for using in transition band of cement kiln and clinkering zone engaging portion.Compared to siliceous mullite brick 6 months or so service life of common intermediate zone, the service life of product of the present invention was at 12 months or more.
Description
Technical field
A kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide brick, are main with fused mullite
Aggregate improves the wear-resisting property of product.The higher sintering plate corundum fine powder of reactivity and silicon powder are added in matrix, it is in situ
Generate rich aluminum-containing mullite phase.Compared to traditional siliceous mullite brick, the erosion performance of resistance to clinker is more excellent under the high temperature conditions for this product
More.The intermediate zone being mainly used in inside new type nonaqueous cement rotary kiln and clinkering zone engaging portion solve the region refractory material
Serious problem is damaged in use process.
Background technique
Mullite is Al2O3-SiO2Compound uniquely stable in binary system, fusing point (1890 ± 90) DEG C, and have
The advantages that good thermal shock, high-temerature creep amount is small, and linear expansion coefficient is small, and resistance to chemical attack is strong is refractories industry ideal
Raw material.
Silicon carbide is also good raw material for refractory, and hardness is high, with the increase of volume in oxidation process.In high alumina
Silicon carbide is added in fire resistant materials, the wear-resisting property performance of fire resistive material product can be promoted;And the body in its oxidation process
The reheating that product expansion helps compensate for refractory material is shunk, and refractoriness under load and creep-resistant property are improved.
1000-1300 DEG C of temperature of charge of cement intermediate zone, 1600 DEG C of gas temperature.Currently, new dry cement production line returns
Rotary kiln intermediate zone master siliceous mullite brick to be used, this refractory product is mainly using alumine, silicon carbide as primary raw material, sintering
The refractory product of preparation.It is excellent in the using effect of transition band of cement kiln, and service life can achieve 12 months or more.
The temperature of charge of cement clinkering zone is at 1300-1450 DEG C, and highest flame temperature is up to 1700 DEG C, and cement kiln is burnt at present
Basic refractory is mainly used at band.Because firing has the presence of kliner coating, the hot-face temperature of basic brick is greatly reduced, fire resisting
Material corrosion is slowed down, and the service life can reach using target.
However, the basic brick that whether clinkering zone generallys use is either in transition band of cement kiln and clinkering zone engaging portion
Common siliceous mullite brick, the service life of the two are all difficult to reach expected, and often only 6 months or so.Because close to clinkering zone, herein
Refractory material is higher than the refractory material at other positions of intermediate zone using temperature;Simultaneously as the not protective effect of kliner coating, high
Temperature material is also stronger to the chemical erosion of refractory material and physical abrasion effect.
The intensity of basic brick is generally below siliceous mullite brick, in the not protective effect of kliner coating again of this position use of time, high temperature
Material directly contact basic brick surface, cause basic brick by high temperature wear service life reduction.Meanwhile the thermal coefficient of basic brick is wanted
Higher than siliceous mullite brick, this position, which lacks kliner coating protection, causes basic brick hot-face temperature higher, and cement kiln is eventually made hot spot shape occur
Condition, i.e. cylinder of rotary kiln surface temperature is excessively high, influences cement production enterprise and normally produces.
Siliceous mullite brick is at this position in use, since environment temperature is compared with intermediate zone height, and by the work of high temperature chamotte chemical erosion
With strong, service life is also difficult to reach requirement.
As unique stable compound in aluminium silicon systems binary system, the theoretical group of mullite becomes Al2O371.8%,
SiO228.2%.Common siliceous mullite brick often uses alumina as base starting material, SiO2It is higher.Thus Oxidation of SiC and by
In the case that siliceous component corrodes in clinker, higher SiO in matrix2Content be unfavorable for and the high-temperature behavior of product.Compared with
High SiO2It is difficult to and Al2O3It sufficiently combines and forms mullite, and exist in a free form.The aluminium silicon binary system of high silicon exists
High-temperature behavior higher aluminum system is poor, when being used for intermediate zone and junction belt, is easy by high temperature erosion.These free SiO simultaneously2
Expansile kaliophilite (K is formed by the erosion of the alkali compounds penetrated into brick from kiln material in Local enrichment2O·
Al2O3·2SiO2) and leucite (K2O·Al2O3·4SiO2), brick " alkali cracking " is damaged, service life is influenced.
Summary of the invention
It is an object of the present invention to study a kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide
Brick, performance can satisfy the requirement of cement kiln clinkering zone and clinkering zone engaging portion.
The alumine that product of the present invention is generallyd use using fused mullite rather than siliceous mullite brick is reinforced as particles of aggregates
The wear-resisting property and high temperature, erosion resistant performance of product;It is added to plate diamond spar fine powder and silicon powder simultaneously in matrix simultaneously, with
Achieve the purpose that in-situ preparation mullite strengthens matrix in sintering process.Higher Al especially in matrix2O3Content and lower
SiO2Content can guarantee the SiO formed after Oxidation of SiC2Mullite can be formed rather than low melting point phase.Pass through the above skill
Art means adapt to the requirement of particular surroundings so that the wearability of product, corrosion resistance are better than common siliceous mullite brick.
] according to analysis, propose a kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide brick, it is special
Sign is, the raw material components weight ratio of the mullite corundum silicon carbide brick are as follows:
5-2mm fused mullite 25-15%
2-1mm fused mullite 30-20%
1-0.088mm fused mullite 20-10%
< 0.088mm silicon carbide 15-10%
< 0.088mm plate diamond spar 20-10%
20-15 μm of silicon powder 5-0%
The bonding agent of above-mentioned all total mass of raw material 3.5-1.5% is mixed outside.
The fused mullite is Al2O3Content is more than or equal to 70% refractory raw material of the same name.
The plate diamond spar is Al2O3Content is more than or equal to 99% refractory raw material of the same name.
The silicon carbide is the refractory raw material of the same name that SiC content is more than or equal to 98%.
The silicon powder is SiO2Content is more than or equal to 95% refractory raw material of the same name.
The bonding agent is any one of lignosulfonic acid magnesium, magnesium chloride solution or two kinds;The specific gravity of the bonding agent is
1.05~1.25.
The corundum carborundum brick, it is characterised in that: according to above-mentioned formula through weighing, mixing, molding, drying,
1450-1550 DEG C was made through firing in 5-8 hours.
This product uses fused mullite aggregate, and compared to the alumina aggregate of common siliceous mullite brick, wear-resisting property is more preferable.Again
Because it has generated stable mullite phase, the SiO in component2Do not exist with free state, in the high temperature environment, anti-clinker
Middle SiO2, the aggressivity of alkaline matter is stronger.Matrix mixes plate diamond spar fine powder, and higher aluminium content ensure that it can be with carbon
Siliceous component in SiClx oxidation and clinker forms mullite, and is not likely to produce Silicon-rich system under alkaline material erosion
In the kaliophilite and leucite that are easy to appear, reduce alkali cracking effect.The addition of a small amount of high activity silicon powder can be in sintering process
In with plate diamond spar matrix form mullite, play the role of strengthening matrix and acceleration of sintering.Make product by the above means
It is able to satisfy requirement, the resistance to chemical attack and wearability of product improve a lot, and are more suitable for cement kiln clinkering zone
The special duty requirements with intermediate zone engaging portion.Service life at this position can achieve 12 months, and using effect is better than general
Logical siliceous mullite brick and basic brick, meet cement industry demand.
Specific implementation
Embodiment 1
Mullite corundum silicon carbide brick: 5-2mm fused mullite 20% is prepared using following quality proportionings, 2-1mm sintering does not come
Stone 25%, 1-0.088mm fused mullite 20%, < 0.088mm silicon carbide 15%, < 0.088mm plate diamond spar 17%, 20-15 μ
M silicon powder 3%.Additional 2% bonding agent (specific gravity 1.05).Load weighted material and bonding agent are poured into mold and are pressed after being kneaded
Type is made, 1500 DEG C × 6h is burnt into after drying.Performance by implementing brick above is refractoriness under load T0.6>=1700 DEG C, heat
1100 DEG C of water coolings 14 times, compressive resistance 115.64MPa are shaken, apparent porosity 16.6%.
Embodiment 2
Mullite corundum silicon carbide brick: 5-2mm fused mullite 17% is prepared using following quality proportionings, 2-1mm sintering does not come
Stone 30%, 1-0.088mm fused mullite 17%, < 0.088mm silicon carbide 14%, < 0.088mm plate diamond spar 20%, 20-15 μ
M silicon powder 2%.Additional 1.8% bonding agent (specific gravity 1.21).Load weighted material and bonding agent pour into mold after being kneaded
Compression moulding, 1450 DEG C × 8h is burnt into after drying.Performance by implementing brick above is refractoriness under load T0.6>=1680 DEG C,
1100 DEG C of thermal shock water cooling 12 times, compressive resistance 114.75MPa, apparent porosity 16.2%.
Embodiment 3
Mullite corundum silicon carbide brick: 5-2mm fused mullite 22% is prepared using following quality proportionings, 2-1mm sintering does not come
Stone 26%, 1-0.088mm fused mullite 19%, < 0.088mm silicon carbide 10%, < 0.088mm plate diamond spar 22%, 20-15 μ
M silicon powder 1%.Additional 3% bonding agent (specific gravity 1.18).Load weighted material and bonding agent are poured into mold and are pressed after being kneaded
Type is made, 1450 DEG C × 8h is burnt into after drying.Performance by implementing brick above is refractoriness under load T0.6>=1700 DEG C, heat
1100 DEG C of water coolings 16 times, compressive resistance 111.79MPa are shaken, apparent porosity 17.0%.
Embodiment 4
Mullite corundum silicon carbide brick: 5-2mm fused mullite 25% is prepared using following quality proportionings, 2-1mm sintering does not come
Stone 20%, 1-0.088mm fused mullite 15%, < 0.088mm silicon carbide 15%, < 0.088mm plate diamond spar 24%, 20-15 μ
M silicon powder 1%.Additional 3.5% bonding agent (specific gravity 1.25).Load weighted material and bonding agent pour into mold after being kneaded
Compression moulding, 1450 DEG C × 5h is burnt into after drying.Performance by implementing brick above is refractoriness under load T0.6>=1680 DEG C,
1100 DEG C of thermal shock water cooling 14 times, compressive resistance 105.11MPa, apparent porosity 17.9%.
Embodiment 5
Mullite corundum silicon carbide brick: 5-2mm fused mullite 15% is prepared using following quality proportionings, 2-1mm sintering does not come
Stone 29%, 1-0.088mm fused mullite 25%, < 0.088mm silicon carbide 14%, < 0.088mm plate diamond spar 15%, 20-15 μ
M silicon powder 2%.Additional 1.5% bonding agent (specific gravity 1.05).Load weighted material and bonding agent pour into mold after being kneaded
Compression moulding, 1550 DEG C × 8h is burnt into after drying.Performance by implementing brick above is refractoriness under load T0.6>=1650 DEG C,
1100 DEG C of thermal shock water cooling 15 times, compressive resistance 102.43MPa, apparent porosity 18.0%.
Claims (7)
1. a kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide brick, which is characterized in that described not come
The raw material components weight ratio of stone silicon carbide brick are as follows:
5-2mm fused mullite 20-0%
2-1mm fused mullite 30-10%
1-0.088mm plate diamond spar 20-10%
< 0.088mm silicon carbide 15-10%
< 0.088mm plate diamond spar 20-10%
20-15 μm of silicon powder 5-0%
The bonding agent of above-mentioned all total mass of raw material 3.5-1.5% is mixed outside.
2. fused mullite according to claim 1 is Al2O3Content is more than or equal to 70% refractory raw material of the same name.
3. plate diamond spar according to claim 1 is Al2O3Content is more than or equal to 99% refractory raw material of the same name.
4. silicon carbide according to claim 1 is the refractory raw material of the same name that SiC content is more than or equal to 98%.
5. silicon powder according to claim 1 is SiO2Content is more than or equal to 95% refractory raw material of the same name.
6. bonding agent is any one of lignosulfonic acid magnesium, magnesium chloride solution or two kinds according to claim 1;The combination
The specific gravity of agent is 1.05~1.25.
7. according to corundum carborundum brick described in claim 1, it is characterised in that: according to above-mentioned formula through weighing, mixing, molding,
It is dry, obtained through firing in 5-8 hours at 1450-1550 DEG C.
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Cited By (5)
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CN110452004A (en) * | 2019-09-04 | 2019-11-15 | 郑州瑞泰耐火科技有限公司 | A kind of cement rotary kiln transition belt novel fire-resistant lining brick and preparation method thereof |
CN110937907A (en) * | 2019-11-28 | 2020-03-31 | 浙江锦诚新材料股份有限公司 | Energy-saving mullite-corundum-silicon carbide refractory brick for cement kiln transition zone and preparation method thereof |
CN110963807A (en) * | 2019-11-28 | 2020-04-07 | 浙江锦诚新材料股份有限公司 | Energy-saving mullite refractory brick for cement kiln transition zone and preparation method thereof |
CN112028643A (en) * | 2020-06-24 | 2020-12-04 | 北京金隅通达耐火技术有限公司 | Single-crystal-phase mullite brick for cement kiln and preparation method thereof |
CN117069504A (en) * | 2023-08-21 | 2023-11-17 | 郑州利孚新材料有限公司 | Titanium-aluminum-based ceramic composite material |
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CN102329141A (en) * | 2011-07-22 | 2012-01-25 | 郑州京华耐火材料实业有限公司 | Silicon-carbide composite corundum mullite brick |
CN103130516A (en) * | 2011-12-02 | 2013-06-05 | 河南省新密市青屏耐火材料有限责任公司 | Mullite carborundum brick used for dry quenching stove |
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EP1234807B1 (en) * | 2001-02-26 | 2005-12-28 | Refratechnik Holding GmbH | Refractory body with increased alkali resistance |
CN1458123A (en) * | 2003-05-21 | 2003-11-26 | 宜兴新威利成耐火材料有限公司 | Refractory material for circular fluidized bed boiler |
CN102329141A (en) * | 2011-07-22 | 2012-01-25 | 郑州京华耐火材料实业有限公司 | Silicon-carbide composite corundum mullite brick |
CN103130516A (en) * | 2011-12-02 | 2013-06-05 | 河南省新密市青屏耐火材料有限责任公司 | Mullite carborundum brick used for dry quenching stove |
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