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 PDF

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Publication number
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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mullite
silicon carbide
raw material
brick
bonding agent
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徐如林
闫昕
王俊涛
王杰曾
胡建辉
徐琳琳
魏瀚
周严敦
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RUITAI TECHNOLOGY Co Ltd
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RUITAI TECHNOLOGY Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16Shaped 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
    • C04B35/18Shaped 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
    • C04B35/185Mullite 3Al2O3-2SiO2
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3817Carbides
    • C04B2235/3826Silicon carbides
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428Silicon
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    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5427Particle 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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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
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    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
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    • C04B2235/9607Thermal 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

A kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide brick
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.
CN201811617474.5A 2018-12-28 2018-12-28 A kind of transition band of cement kiln and clinkering zone engaging portion mullite corundum silicon carbide brick Pending CN109534833A (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
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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EP1234807B1 (en) * 2001-02-26 2005-12-28 Refratechnik Holding GmbH Refractory body with increased alkali resistance
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
CN104803692A (en) * 2015-04-22 2015-07-29 浙江自立股份有限公司 Corundum-mullite burnt brick applied to gas turbine combustion chamber and preparation method thereof

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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
CN104803692A (en) * 2015-04-22 2015-07-29 浙江自立股份有限公司 Corundum-mullite burnt brick applied to gas turbine combustion chamber and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
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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
CN110452004B (en) * 2019-09-04 2022-03-22 郑州瑞泰耐火科技有限公司 Refractory lining brick for transition zone of rotary cement kiln 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
CN112028643B (en) * 2020-06-24 2022-07-08 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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Application publication date: 20190329