CN107010969A - A kind of preparation method of high-alumina brick - Google Patents
A kind of preparation method of high-alumina brick Download PDFInfo
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- CN107010969A CN107010969A CN201710265098.7A CN201710265098A CN107010969A CN 107010969 A CN107010969 A CN 107010969A CN 201710265098 A CN201710265098 A CN 201710265098A CN 107010969 A CN107010969 A CN 107010969A
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
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- 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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Abstract
The invention discloses a kind of preparation method of high-alumina brick, belong to technical field of fire-resistant material preparation.The present invention is first by kaolinite, the ores such as boehmite, which are crushed, must mix ultra-fine ores powder, homogenized after ultra-fine ores powder and water mixing will be mixed again, and suspension is made, suspension is added in absolute ethyl alcohol, epoxychloropropane and lauryl amine are sequentially added after mixing, filtered after hybrid reaction, collect filter residue and dry to obtain dried object, again by biotite, silica etc. obtains additive package after pulverizing and sieving, and and dried object, engineering dregs etc., which are mixed and added into mould, is pressed into adobe, finally by adobe steam press maintenance and dry, high temperature sintering, high-alumina brick is can obtain through cooling, high-alumina brick produced by the present invention has higher intensity, more stable volume, brick body apparent porosity is low simultaneously, effectively increase high-alumina brick compactness, improve high-alumina brick anti-strip and erosion-resisting characteristics, so as to extend high-alumina brick service life.
Description
Technical field
The invention discloses a kind of preparation method of high-alumina brick, belong to technical field of fire-resistant material preparation.
Background technology
Refractory material refers to that refractoriness is not less than 1500 DEG C of inorganic non-metallic material, as high temperature kiln and elevated temperature vessel
Etc. the component material in the structure and high temperature service of Thermal Equipment.Refractory material is the basic material serviced for high-temperature technology,
The departments such as main application and steel industry, non-ferrous metal industry, building material industry, petrochemistry industry, mechanical industry.
High-alumina brick is one of fireclay insulating refractory more satisfactory at present, is one kind of aluminum-carbon refractory material, with resistance to
Compressive Strength height, low thermal conductivity factor, good heat insulating, lower-price characteristic, have been widely used in ceramic roller kiln, roller-way
Kiln, shuttle kiln, wall kiln, are also used for various heating furnaces, coking furnace and other Thermal Equipments, the heat treatment liner material of steel industry
Material etc..
At present, high-quality bauxite clinker is used for aggregate mostly, using phosphoric acid or phosphate as bonding agent, be re-introduced into microdilatancy former
Material, such as：Quartz, alabaster, kyanite, sillimanite, andalusite etc., after high-pressure molding, then carry out at less than 1000 DEG C hot place
Reason, so that high-alumina brick is made.However, high-alumina brick anti-strip and erosion-resisting characteristics prepared by existing method is not enough, while existing height
The aluminium brick porosity is big, and wearability is undesirable, causes its service life shorter.Therefore, a kind of performance is sought comprehensive, compact structure
High-alumina brick turns into urgent problem to be solved in the industry.
The content of the invention
Present invention mainly solves technical problem：It is not enough for existing high-alumina brick anti-strip and erosion-resisting characteristics, simultaneously
The former high-alumina brick of existing high-alumina brick in use, because volume stability is poor, brick shrinks big, thus causes molten steel to corrode expansion,
There is provided a kind of preparation method of high-alumina brick for the problem of service life is shorter.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）In mass ratio 1:1:2:2, kaolinite, boehmite, mullite and alumine are weighed respectively, sequentially add pulverizer
It is middle to crush, mixed ore powder is obtained after crushing, mixed ore powder crushing in airslide disintegrating mill is added into, sieving must mix super
Fine ore powder, in mass ratio 1:6 will add in refiner after mixing ultra-fine ores powder and water mixing, obtain suspended after homogenate
Liquid；
（2）In mass ratio 1:Suspension is mixed to obtain mixed liquor by 3 with absolute ethyl alcohol, and epoxychloropropane is sequentially added into mixed liquor
And lauryl amine, continue to filter after 3~4h of stirring reaction, collect filter residue and be put into baking oven and dry, obtain dried object；
（3）Count by weight, 20~40 parts of biotite, 25~30 parts of silica, 10~15 parts of chrysotiles and 15 are weighed respectively
~25 parts of aramid fibers, are added in pulverizer and crush, and additive package is obtained after sieving；
（4）Count by weight, 90~100 parts of dried objects, 6~10 parts of additive packages, 5~10 parts of engineering slags are chosen respectively
Soil, 3~5 parts of diatomite, 1~3 part of neopelex and 6~10 parts of water, are added in mixer, 1~2h of stirring mixing
Mixed material is obtained afterwards, then mixed material is added in mould, it is compressing using brick machine, adobe is obtained after compacting；
（5）Adobe after shaping is placed in still kettle, room temperature is down to after steam press maintenance, the adobe after maintenance is taken out and is put into baking oven
Middle drying, then room temperature is naturally cooled to after dried adobe is put into tunnel kiln sintering, sintering, you can obtain high-alumina brick.
Step（1）Described in mixing ultra-fine ores powder mesh number be 2800~2900 mesh.
Step（1）Described in refiner rotating speed be 8000~10000r/min, Homogenization time be 10~15min.
Step（2）Described in epoxychloropropane quality be mixed liquor quality 6~9%, lauryl amine quality be mixed liquor quality
3~5%.
Step（4）Described in brick machine pressure be 40~60MPa, the press time be 30~60s.
Step（5）Described in still kettle temperature be 250~300 DEG C, pressure be 0.5~0.7MPa, during steam press maintenance
Between be 6~8h.
Step（5）Described in sintering temperature be 1450~1500 DEG C, sintering time be 4~5h.
The beneficial effects of the invention are as follows：
（1）The present invention, which first crushes the ores such as kaolinite, boehmite, mullite, must mix ultra-fine ores powder, then mixing is super
Suspension is made in homogenized after fine ore powder and water mixing, as raw material after the mixing of the invention by the use of ores such as kaolinites,
There is the effect cooperateed with well between raw material,, can after volume contraction occurs for adobe in the high temperature sintering of high-alumina brick is prepared
To utilize alumine and kaolinic micro-expansibility, the Volume Changes of high-alumina brick are offset so that the high alumina brick body finally given
Product is stable；
（2）The present invention prepares suspension and added in absolute ethyl alcohol, and epoxychloropropane and lauryl amine are sequentially added after mixing, is stirred
Mix and filtered after mixing, collect filter residue and dry dried object, the present invention is in absolute ethyl alcohol using epoxychloropropane and lauryl amine
Reacted under the regulation of solvent, cationic surfactant is generated between the ultra-fine ores particle of suspension, can be to ore
Grain surface is modified, and strengthens the absorption property of particle surface, so that the adhesion between improving ore particles, obtains volume stability
High-alumina brick；
（3）The present invention obtains additive package after biotite, silica etc. pulverize and sieve, by additive package and dried object, silicon
The material mixings such as diatomaceous earth, after mixing add mould in be pressed into adobe, finally by adobe steam press maintenance and dry, high temperature sintering,
High-alumina brick is can obtain through cooling, the present invention adds additive package in high-alumina brick, can improve the corrosion resistance of high-alumina brick
Can, the materials such as diatomite are added, can be reacted between high-alumina brick feed particles, so that the adhesion strength of adobe matrix increases
Greatly, corrosion resistance strengthens；
（4）High-alumina brick produced by the present invention has good thermal shock resistance energy, erosion-resisting characteristics, effectively increases high-alumina brick
High temperature resistant physical property, while improving the formability of high-alumina brick, reduces the apparent porosity of brick body, brick laying structure is more caused
It is close, effectively extend the service life of high-alumina brick.
Embodiment
In mass ratio 1:1:2:2, kaolinite, boehmite, mullite and alumine are weighed respectively, sequentially add pulverizer
It is middle to crush, 50~60 mesh sieves are crossed after crushing and obtain mixed ore powder, then add to enter in airslide disintegrating mill by mixed ore powder
Row is crushed, and 2800~2900 mesh sieves are crossed after crushing, ultra-fine ores powder, in mass ratio 1 must be mixed:6 will mix ultra-fine ores powder
Added after the mixing of last and water in refiner, be homogenized with 8000~10000r/min rotating speeds after 10~15min and obtain suspension, then by matter
Amount compares 1:3 mix suspension with absolute ethyl alcohol, and 10~15min of stirring mixing obtains mixed liquor, is sequentially added into mixed liquor mixed
The epoxychloropropane of liquid quality 6~9% and the lauryl amine of mixed liquor quality 3~5% are closed, filter residue is filtered to obtain after continuing 3~4h of stirring reaction,
And filter residue is put into baking oven, 6~8h is dried at a temperature of 100~120 DEG C, dried object is obtained, counts by weight, weigh respectively
20~40 parts of biotite, 25~30 parts of silica, 10~15 parts of chrysotiles and 15~25 parts of aramid fibers, add powder in pulverizer
200~220 mesh sieves are crossed after broken and obtain additive package, then are counted by weight, take respectively 90~100 parts of dried objects, 6~10 parts mix
Additive, 5~10 parts of engineering dregs, 3~5 parts of diatomite, 1~3 part of neopelex and 6~10 parts of water are closed, are used
Mixer, with 600~800r/min rotating speeds stirring 1~2h of mixing, obtains and is added after mixed material in mould, using brick machine 40
30~60s shapings are suppressed under~60MPa pressure, adobe is obtained after compacting, then the adobe after shaping is placed in still kettle, are controlled
Still kettle temperature is 250~300 DEG C, and pressure is 0.5~0.7MPa, and room temperature is down to after 6~8h of steam press maintenance, is taken out after maintenance
Adobe is put into baking oven, and 6~10h is dried at a temperature of 150~200 DEG C, dried adobe is put into tunnel cave, 1450
Room temperature is naturally cooled to after sintering 4~5h, sintering at a temperature of~1500 DEG C, you can obtain high-alumina brick.
Example 1
In mass ratio 1:1:2:2, kaolinite, boehmite, mullite and alumine are weighed respectively, sequentially add powder in pulverizer
It is broken, 50~60 mesh sieves are crossed after crushing and obtain mixed ore powder, then mixed ore powder is added in airslide disintegrating mill and carries out powder
It is broken, 2800~2900 mesh sieves are crossed after crushing, ultra-fine ores powder, in mass ratio 1 must be mixed:6 will mixing ultra-fine ores powder and
Added after water mixing in refiner, be homogenized with 8000~10000r/min rotating speeds after 10~15min and obtain suspension, then in mass ratio
1:3 mix suspension with absolute ethyl alcohol, and 10~15min of stirring mixing obtains mixed liquor, and mixed liquor is sequentially added into mixed liquor
The epoxychloropropane of quality 6~9% and the lauryl amine of mixed liquor quality 3~5%, continue to filter to obtain filter residue after 3~4h of stirring reaction, and will
Filter residue is put into baking oven, and 6~8h is dried at a temperature of 100~120 DEG C, dried object is obtained, counts by weight, weigh 20 respectively~
40 parts of biotite, 25~30 parts of silica, 10~15 parts of chrysotiles and 15~25 parts of aramid fibers, are added after being crushed in pulverizer
Cross 200~220 mesh sieves and obtain additive package, then count by weight, take 90~100 parts of dried objects, 6~10 parts of mixing to add respectively
Plus agent, 5~10 parts of engineering dregs, 3~5 parts of diatomite, 1~3 part of neopelex and 6~10 parts of water, use stirring
Machine, with 600~800r/min rotating speeds stirring 1~2h of mixing, obtains and is added after mixed material in mould, using brick machine 40~
30~60s shapings are suppressed under 60MPa pressure, adobe is obtained after compacting, then the adobe after shaping is placed in still kettle, control is steamed
It is 250~300 DEG C to press kettle temperature degree, and pressure is to be down to room temperature after 0.5~0.7MPa, 6~8h of steam press maintenance, takes out the brick after maintenance
Base is put into baking oven, and 6~10h is dried at a temperature of 150~200 DEG C, dried adobe is put into tunnel cave, 1450~
Room temperature is naturally cooled to after sintering 4~5h, sintering at a temperature of 1500 DEG C, you can obtain high-alumina brick.
After testing, high-alumina brick bulk density produced by the present invention is 2.95g/cm3, apparent porosity is 10%, brick body heat conduction system
Number is 0.22W/（m·K）, with preferable erosion-resisting characteristics and energy-saving heat preserving effect, while high-alumina brick intensity of the present invention is higher,
Wherein brick body cold crushing strength reach 110MPa, strength at normal temperature reach 25MPa, 0.2MPa refractorinesss under load up to 1750 DEG C,
And high-alumina brick of the present invention is wear-resisting, antistrip performance preferably, effectively extend high-alumina brick service life, service life and traditional high alumina
Brick is compared and extended 6 months.
Example 2
In mass ratio 1:1:2:2, kaolinite, boehmite, mullite and alumine are weighed respectively, sequentially add powder in pulverizer
It is broken, 50~60 mesh sieves are crossed after crushing and obtain mixed ore powder, then mixed ore powder is added in airslide disintegrating mill and carries out powder
It is broken, 2800~2900 mesh sieves are crossed after crushing, ultra-fine ores powder, in mass ratio 1 must be mixed:6 will mixing ultra-fine ores powder and
Added after water mixing in refiner, be homogenized with 8000~10000r/min rotating speeds after 10~15min and obtain suspension, then in mass ratio
1:3 mix suspension with absolute ethyl alcohol, and 10~15min of stirring mixing obtains mixed liquor, and mixed liquor is sequentially added into mixed liquor
The epoxychloropropane of quality 6~9% and the lauryl amine of mixed liquor quality 3~5%, continue to filter to obtain filter residue after 3~4h of stirring reaction, and will
Filter residue is put into baking oven, and 6~8h is dried at a temperature of 100~120 DEG C, dried object is obtained, counts by weight, weigh 20 respectively~
40 parts of biotite, 25~30 parts of silica, 10~15 parts of chrysotiles and 15~25 parts of aramid fibers, are added after being crushed in pulverizer
Cross 200~220 mesh sieves and obtain additive package, then count by weight, take 90~100 parts of dried objects, 6~10 parts of mixing to add respectively
Plus agent, 5~10 parts of engineering dregs, 3~5 parts of diatomite, 1~3 part of neopelex and 6~10 parts of water, use stirring
Machine, with 600~800r/min rotating speeds stirring 1~2h of mixing, obtains and is added after mixed material in mould, using brick machine 40~
30~60s shapings are suppressed under 60MPa pressure, adobe is obtained after compacting, then the adobe after shaping is placed in still kettle, control is steamed
It is 250~300 DEG C to press kettle temperature degree, and pressure is to be down to room temperature after 0.5~0.7MPa, 6~8h of steam press maintenance, takes out the brick after maintenance
Base is put into baking oven, and 6~10h is dried at a temperature of 150~200 DEG C, dried adobe is put into tunnel cave, 1450~
Room temperature is naturally cooled to after sintering 4~5h, sintering at a temperature of 1500 DEG C, you can obtain high-alumina brick.
After testing, high-alumina brick bulk density produced by the present invention is 3.15g/cm3, apparent porosity is 12%, brick body heat conduction system
Number is 0.25W/（m·K）, with preferable erosion-resisting characteristics and energy-saving heat preserving effect, while high-alumina brick intensity of the present invention is higher,
Wherein brick body cold crushing strength reach 120MPa, strength at normal temperature reach 32MPa, 0.2MPa refractorinesss under load up to 1800 DEG C,
And high-alumina brick of the present invention is wear-resisting, antistrip performance preferably, effectively extend high-alumina brick usage cycles, service life and traditional high alumina
Brick is compared and extended 7 months.
Example 3
In mass ratio 1:1:2:2, kaolinite, boehmite, mullite and alumine are weighed respectively, sequentially add powder in pulverizer
It is broken, 50~60 mesh sieves are crossed after crushing and obtain mixed ore powder, then mixed ore powder is added in airslide disintegrating mill and carries out powder
It is broken, 2800~2900 mesh sieves are crossed after crushing, ultra-fine ores powder, in mass ratio 1 must be mixed:6 will mixing ultra-fine ores powder and
Added after water mixing in refiner, be homogenized with 8000~10000r/min rotating speeds after 10~15min and obtain suspension, then in mass ratio
1:3 mix suspension with absolute ethyl alcohol, and 10~15min of stirring mixing obtains mixed liquor, and mixed liquor is sequentially added into mixed liquor
The epoxychloropropane of quality 6~9% and the lauryl amine of mixed liquor quality 3~5%, continue to filter to obtain filter residue after 3~4h of stirring reaction, and will
Filter residue is put into baking oven, and 6~8h is dried at a temperature of 100~120 DEG C, dried object is obtained, counts by weight, weigh 20 respectively~
40 parts of biotite, 25~30 parts of silica, 10~15 parts of chrysotiles and 15~25 parts of aramid fibers, are added after being crushed in pulverizer
Cross 200~220 mesh sieves and obtain additive package, then count by weight, take 90~100 parts of dried objects, 6~10 parts of mixing to add respectively
Plus agent, 5~10 parts of engineering dregs, 3~5 parts of diatomite, 1~3 part of neopelex and 6~10 parts of water, use stirring
Machine, with 600~800r/min rotating speeds stirring 1~2h of mixing, obtains and is added after mixed material in mould, using brick machine 40~
30~60s shapings are suppressed under 60MPa pressure, adobe is obtained after compacting, then the adobe after shaping is placed in still kettle, control is steamed
It is 250~300 DEG C to press kettle temperature degree, and pressure is to be down to room temperature after 0.5~0.7MPa, 6~8h of steam press maintenance, takes out the brick after maintenance
Base is put into baking oven, and 6~10h is dried at a temperature of 150~200 DEG C, dried adobe is put into tunnel cave, 1450~
Room temperature is naturally cooled to after sintering 4~5h, sintering at a temperature of 1500 DEG C, you can obtain high-alumina brick.
After testing, high-alumina brick bulk density produced by the present invention is 3.35g/cm3, apparent porosity is 13%, brick body heat conduction system
Number is 0.28W/（m·K）, with preferable erosion-resisting characteristics and energy-saving heat preserving effect, while high-alumina brick intensity of the present invention is higher,
Wherein brick body cold crushing strength reach 130MPa, strength at normal temperature reach 40MPa, 0.2MPa refractorinesss under load up to 1850 DEG C,
And high-alumina brick of the present invention is wear-resisting, antistrip performance preferably, effectively extend high-alumina brick service life, service life and traditional high alumina
Brick is compared and extended 8 months.
Claims (7)
1. a kind of preparation method of high-alumina brick, it is characterised in that specifically preparation process is：
（1）In mass ratio 1:1:2:2, kaolinite, boehmite, mullite and alumine are weighed respectively, sequentially add pulverizer
It is middle to crush, mixed ore powder is obtained after crushing, mixed ore powder crushing in airslide disintegrating mill is added into, sieving must mix super
Fine ore powder, in mass ratio 1:6 will add in refiner after mixing ultra-fine ores powder and water mixing, obtain suspended after homogenate
Liquid；
（2）In mass ratio 1:Suspension is mixed to obtain mixed liquor by 3 with absolute ethyl alcohol, and epoxychloropropane is sequentially added into mixed liquor
And lauryl amine, continue to filter after 3~4h of stirring reaction, collect filter residue and be put into baking oven and dry, obtain dried object；
（3）Count by weight, 20~40 parts of biotite, 25~30 parts of silica, 10~15 parts of chrysotiles and 15 are weighed respectively
~25 parts of aramid fibers, are added in pulverizer and crush, and additive package is obtained after sieving；
（4）Count by weight, 90~100 parts of dried objects, 6~10 parts of additive packages, 5~10 parts of engineering slags are chosen respectively
Soil, 3~5 parts of diatomite, 1~3 part of neopelex and 6~10 parts of water, are added in mixer, 1~2h of stirring mixing
Mixed material is obtained afterwards, then mixed material is added in mould, it is compressing using brick machine, adobe is obtained after compacting；
（5）Adobe after shaping is placed in still kettle, room temperature is down to after steam press maintenance, the adobe after maintenance is taken out and is put into baking oven
Middle drying, then room temperature is naturally cooled to after dried adobe is put into tunnel kiln sintering, sintering, you can obtain high-alumina brick.
2. a kind of preparation method of high-alumina brick according to claim 1, it is characterised in that：Step（1）Described in mixing
The mesh number of ultra-fine ores powder is 2800~2900 mesh.
3. a kind of preparation method of high-alumina brick according to claim 1, it is characterised in that：Step（1）Described in homogenate
The rotating speed of machine is 8000~10000r/min, and Homogenization time is 10~15min.
4. a kind of preparation method of high-alumina brick according to claim 1, it is characterised in that：Step（2）Described in epoxy
Chloropropane quality is mixed liquor quality 6~9%, and lauryl amine quality is mixed liquor quality 3~5%.
5. a kind of preparation method of high-alumina brick according to claim 1, it is characterised in that：Step（4）Described in pressure brick
The pressure of machine is 40~60MPa, and the press time is 30~60s.
6. a kind of preparation method of high-alumina brick according to claim 1, it is characterised in that：Step（5）Described in steam pressure
The temperature of kettle is 250~300 DEG C, and pressure is 0.5~0.7MPa, and the steam press maintenance time is 6~8h.
7. a kind of preparation method of high-alumina brick according to claim 1, it is characterised in that：Step（5）Described in sintering
Temperature is 1450~1500 DEG C, and sintering time is 4~5h.
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Cited By (3)
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| CN111099905A (en) * | 2020-01-06 | 2020-05-05 | 东台市宏大耐热材料有限公司 | High-aluminum refractory brick and preparation method thereof |
| CN112194471A (en) * | 2020-10-23 | 2021-01-08 | 中钢洛耐科技股份有限公司 | Ultralow-porosity high-alumina brick and preparation process thereof |
| CN114773040A (en) * | 2022-03-17 | 2022-07-22 | 唐山鑫亚耐火材料有限公司 | Sliding plate brick and production method thereof |
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| CN111099905B (en) * | 2020-01-06 | 2021-11-23 | 东台市宏大耐热材料有限公司 | High-aluminum refractory brick and preparation method thereof |
| CN112194471A (en) * | 2020-10-23 | 2021-01-08 | 中钢洛耐科技股份有限公司 | Ultralow-porosity high-alumina brick and preparation process thereof |
| CN114773040A (en) * | 2022-03-17 | 2022-07-22 | 唐山鑫亚耐火材料有限公司 | Sliding plate brick and production method thereof |
| CN114773040B (en) * | 2022-03-17 | 2023-01-13 | 唐山鑫亚耐火材料有限公司 | Sliding plate brick and production method thereof |
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