CN107915491A - A kind of high strength cement kiln refractory brick and preparation method thereof - Google Patents

A kind of high strength cement kiln refractory brick and preparation method thereof Download PDF

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Publication number
CN107915491A
CN107915491A CN201711253648.XA CN201711253648A CN107915491A CN 107915491 A CN107915491 A CN 107915491A CN 201711253648 A CN201711253648 A CN 201711253648A CN 107915491 A CN107915491 A CN 107915491A
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mixture
preparation
refractory brick
brick
high strength
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CN107915491B (en
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李春生
张强
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Liaoning Zhongmei New Materials Co ltd
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Wuhu Kai Kai Mstar Technology Ltd
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Abstract

The invention discloses a kind of high strength cement kiln refractory brick and preparation method thereof, which includes：11）Magnesium aluminate spinel, boron nitride, perlite, diatomite, iron scale powder, sodium metasilicate, cyclodextrin and water are mixed, are aged so that the first mixture is made；2）Bauxite, mullite, aluminium ore slag, carborundum, aluminium oxide, zircon sand, calcium lignosulfonate, sodium metasilicate, cyclodextrin and water are mixed, are aged so that the second mixture is made；3）Second mixture is suppressed so that brick sandwich layer is made, then top and bottom that the first mixture is compounded in brick sandwich layer are suppressed so that adobe is made respectively；4）The adobe is dried, is fired, is cooled down so that the high strength cement kiln refractory brick is made.The refractory brick has excellent mechanical property.

Description

A kind of high strength cement kiln refractory brick and preparation method thereof
Technical field
The present invention relates to refractory brick, and in particular, to a kind of high strength cement kiln refractory brick and preparation method thereof.
Background technology
Cement rotary kiln experienced very long differentiation and evolution, at present cement industry kiln mainly by kilneye, descended Cross band, clinkering zone, lower intermediate zone and set of safety belts into；Since clinkering zone and the working environment of intermediate zone are more severe, so need Refractory brick is set on clinkering zone and the kiln wall of intermediate zone.Refractory brick in ideal needs to have the characteristics that：1）Excellent Hang kliner coating performance；2）Highly resistance thermal chemical reaction ability；3）Excellent anti-slag ability；4）Excellent mechanical strength；5）Excellent heat Shake stability.But the intensity of existing refractory brick is often difficult to meet the needs of market.
The content of the invention
The object of the present invention is to provide a kind of high strength cement kiln refractory brick and preparation method thereof, which has excellent Different mechanical property, while the preparation method has the advantages that process is simple and raw material is easy to get.
To achieve these goals, the present invention provides a kind of preparation method of high strength cement kiln refractory brick, the system Preparation Method includes：
1）Magnesium aluminate spinel, boron nitride, perlite, diatomite, iron scale powder, sodium metasilicate, cyclodextrin and water are mixed, are aged The first mixture is made；
2）By bauxite, mullite, aluminium ore slag, carborundum, aluminium oxide, zircon sand, calcium lignosulfonate, sodium metasilicate, cyclodextrin Mixed, be aged so that the second mixture is made with water；
3）Second mixture is suppressed so that brick sandwich layer is made, then the first mixture is compounded in the top of brick sandwich layer Suppressed respectively with bottom so that adobe is made；
4）The adobe is dried, is fired, is cooled down so that the high strength cement kiln refractory brick is made；
Wherein, in step 3）In, it is provided with carbon fiber between the brick sandwich layer and the first mixture.
Present invention also offers a kind of high strength cement kiln refractory brick, which passes through upper Preparation method is prepared.
Have in refractory brick made from the combination that above-mentioned technical proposal, the present invention pass through each raw material and each operation Excellent mechanical property, while the preparation method has the advantages that process is simple and raw material is easy to get.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The present invention provides a kind of preparation method of high strength cement kiln refractory brick, which includes：
1）Magnesium aluminate spinel, boron nitride, perlite, diatomite, iron scale powder, sodium metasilicate, cyclodextrin and water are mixed, are aged The first mixture is made；
2）By bauxite, mullite, aluminium ore slag, carborundum, aluminium oxide, zircon sand, calcium lignosulfonate, sodium metasilicate, cyclodextrin Mixed, be aged so that the second mixture is made with water；
3）Second mixture is suppressed so that brick sandwich layer is made, then the first mixture is compounded in the top of brick sandwich layer Suppressed respectively with bottom so that adobe is made；
4）The adobe is dried, is fired, is cooled down so that the high strength cement kiln refractory brick is made；
Wherein, in step 3）In, it is provided with carbon fiber between the brick sandwich layer and the first mixture.
In the step 1 of the present invention）In, the particle diameter of each material can select in wide scope, but in order to enable be made Refractory brick there is more excellent mechanical property, it is preferable that in step 1）In, magnesium aluminate spinel, boron nitride, perlite, diatom The average grain diameter of soil each stands alone as 0.5-2.5mm.
In the step 1 of the present invention）In, the dosage of each material can select in wide scope, but in order to enable be made Refractory brick there is more excellent mechanical property, it is preferable that the magnesium aluminate spinel, boron nitride, perlite, diatomite, iron scale Powder, sodium metasilicate, cyclodextrin, the weight ratio of water are 10：0.8-1.5：3-5：2.5-4：6-9：2-4：3.5-4.5：25-35.
In the step 2 of the present invention）In, the dosage of each material can select in wide scope, but in order to enable be made Refractory brick there is more excellent mechanical property, it is preferable that in step 2）In, bauxite, mullite, aluminium ore slag, carborundum, oxygen The weight ratio for changing aluminium, zircon sand, calcined product, calcium lignosulfonate, sodium metasilicate, cyclodextrin and water is 10：6-9：2-4：1- 1.6：2-2.4：3-4.5：2-4：1-3：3.5-4.5：30-50.
In the step 2 of the present invention）In, the particle diameter of each material can select in wide scope, but in order to enable be made Refractory brick there is more excellent mechanical property, it is preferable that in step 2）In, bauxite, mullite, aluminium ore slag, carborundum, oxygen Change aluminium, the average grain diameter of zircon sand each stands alone as 1.8-3mm.
In the step 1 of the present invention）-2）In, the condition of mixing can select in wide scope, but in order to enable be made Refractory brick there is more excellent mechanical property, it is preferable that in step 2）In, mixing meets the following conditions：Mixing temperature is 30- 40 DEG C, incorporation time 40-60min.
In the step 1 of the present invention）-2）In, the condition of ageing can select in wide scope, but in order to enable be made Refractory brick there is more excellent mechanical property, it is preferable that in step 2）In, ageing meets the following conditions：Aging Temperature is 45- 60 DEG C, digestion time 10-20h.
In the step 3 of the present invention）In, the dosage of each material can select in wide scope, but in order to enable be made Refractory brick there is more excellent mechanical property, it is preferable that the first mixture, the second mixture, the weight ratio 10 of carbon fiber：3- 5：0.6-1.
In the step 3 of the present invention）In, the condition of compacting can select in wide scope, but in order to enable obtained Refractory brick has more excellent mechanical property, it is preferable that in step 3）In, the process of compacting is：First by mixture in 20- 20-30min is suppressed under 25MPa, 40-60min is then suppressed under 40-60MPa, most after suppressing 10- under 10-15MPa 15min。
In the step 3 of the present invention）In, dry condition can select in wide scope, but in order to enable obtained Refractory brick has more excellent mechanical property, it is preferable that in step 4）In, drying meets the following conditions：Drying temperature is 125- 140 DEG C, drying time 30-40h.
In the step 4 of the present invention）In, the condition of firing can select in wide scope, but in order to enable obtained Refractory brick has more excellent mechanical property, it is preferable that in step 4）In, fire and be：First from 15-35 DEG C with 0.5-1 DEG C/min Be warming up to 210-240 DEG C and keep the temperature 1-2h, be then warming up to 1050-1150 DEG C with 2.5-3 DEG C/min and keep the temperature 3-5h, finally with 1-1.5 DEG C/min is warming up to 1760-1780 DEG C and keeps the temperature 1-2h.
In the step 4 of the present invention）In, the mode of cooling can select in wide scope, but in order to enable obtained Refractory brick has more excellent mechanical property, it is preferable that cooling is carried out by the way of natural cooling.
Present invention also offers a kind of high strength cement kiln refractory brick, which passes through upper Preparation method is prepared.
The present invention will be described in detail by way of examples below.
Embodiment 1
1）By magnesium aluminate spinel（Average grain diameter is 1.5mm）, boron nitride（Average grain diameter is 1mm）, perlite（Average grain diameter is 2.1mm）, diatomite（Average grain diameter is 1.5mm）, iron scale powder, sodium metasilicate, cyclodextrin and water is according to 10：1：4：3：7：3：4：28 Weight ratio mixed（Mixing temperature is 35 DEG C, incorporation time 50min）, ageing（Aging Temperature is 48 DEG C, digestion time For 15h）The first mixture is made；
2）By bauxite（Average grain diameter is 2.1mm）, mullite（Average grain diameter is 1.2mm）, aluminium ore slag（Average grain diameter is 1.5mm）, carborundum（Average grain diameter is 2.0mm）, aluminium oxide（Average grain diameter is 1.8mm）, zircon sand（Average grain diameter is 1.7mm）, calcium lignosulfonate, sodium metasilicate, cyclodextrin and water mixed（Mixing temperature is 35 DEG C, and incorporation time is 50min）, ageing Aging Temperature be 55 DEG C, digestion time 15h）The second mixture is made；
3）Second mixture is suppressed so that brick sandwich layer is made, then the first mixture is compounded in the top of brick sandwich layer Suppressed respectively with bottom so that adobe is made；Wherein, in step 3）In, it is provided between the brick sandwich layer and the first mixture Carbon fiber；First mixture, the second mixture, the weight ratio 10 of carbon fiber：4：0.8；Single compacting process be：First by institute State mixture and 25min is suppressed under 22MPa, 50min is then suppressed under 50MPa, most after suppressing 12min under 13MPa.
4）The adobe is dried（Drying temperature is 130 DEG C, drying time 35h）, fire（First from 25 DEG C with 0.8 DEG C/min is warming up to 230 DEG C and keeps the temperature 1.5h, is then warming up to 1080 DEG C with 2.8 DEG C/min and keeps the temperature 4h, finally with 1.3 DEG C/min is warming up to 1760-1780 DEG C and keeps the temperature 1.5h）, natural cooling be made the high strength cement kiln refractory brick A1.
Embodiment 2
1）By magnesium aluminate spinel（Average grain diameter is 0.5m）, boron nitride（Average grain diameter is 0.5mm）, perlite（Average grain diameter is 0.5mm）, diatomite（Average grain diameter is 0.5mm）, iron scale powder, sodium metasilicate, cyclodextrin and water is according to 10：0.8：3：2.5：6：2： 3.5：25 weight ratio is mixed（Mixing temperature is 30 DEG C, incorporation time 40min）, ageing（Aging Temperature is 45 DEG C, old The change time is 10h）The first mixture is made；
2）By bauxite（Average grain diameter is 0.5mm）, mullite（Average grain diameter is 0.5mm）, aluminium ore slag（Average grain diameter is 0.5mm）, carborundum（Average grain diameter is 0.5mm）, aluminium oxide（Average grain diameter is 0.5mm）, zircon sand（Average grain diameter is 0.5mm）, calcium lignosulfonate, sodium metasilicate, cyclodextrin and water mixed（Mixing temperature is 30 DEG C, and incorporation time is 40min）, ageing Aging Temperature be 45 DEG C, digestion time 10h）The second mixture is made；
3）Second mixture is suppressed so that brick sandwich layer is made, then the first mixture is compounded in the top of brick sandwich layer Suppressed respectively with bottom so that adobe is made；Wherein, in step 3）In, it is provided between the brick sandwich layer and the first mixture Carbon fiber；First mixture, the second mixture, the weight ratio 10 of carbon fiber：3：0.6；Single compacting process be：First by institute State mixture and 20min is suppressed under 20MPa, 40min is then suppressed under 40MPa, most after suppressing 10min under 10MPa.
4）The adobe is dried（Drying temperature is 125 DEG C, drying time 30h）, fire（First from 15 DEG C with 0.5 DEG C/min is warming up to 250 DEG C and keeps the temperature 1h, is then warming up to 1050 DEG C with 2.5 DEG C/min and keeps the temperature 3h, finally with 1 DEG C/ Min is warming up to 1760 DEG C and keeps the temperature 1-2h）, natural cooling be made the high strength cement kiln refractory brick A2.
Embodiment 3
1）By magnesium aluminate spinel（Average grain diameter is 2.5mm）, boron nitride（Average grain diameter is 2.5mm）, perlite（Average grain diameter is 2.5mm）, diatomite（Average grain diameter is 2.5mm）, iron scale powder, sodium metasilicate, cyclodextrin and water is according to 10：1.5：5：4：9：4： 4.5：35 weight ratio is mixed（Mixing temperature is 40 DEG C, incorporation time 60min）, ageing（Aging Temperature is 60 DEG C, old The change time is 20h）The first mixture is made；
2）By bauxite（Average grain diameter is 2.5mm）, mullite（Average grain diameter is 2.5mm）, aluminium ore slag（Average grain diameter is 2.5mm）, carborundum（Average grain diameter is 2.5mm）, aluminium oxide（Average grain diameter is 2.5mm）, zircon sand（Average grain diameter is 2.5mm）, calcium lignosulfonate, sodium metasilicate, cyclodextrin and water mixed（Mixing temperature is 40 DEG C, and incorporation time is 60min）, ageing Aging Temperature be 60 DEG C, digestion time 20h）The second mixture is made；
3）Second mixture is suppressed so that brick sandwich layer is made, then the first mixture is compounded in the top of brick sandwich layer Suppressed respectively with bottom so that adobe is made；Wherein, in step 3）In, it is provided between the brick sandwich layer and the first mixture Carbon fiber；First mixture, the second mixture, the weight ratio 10 of carbon fiber：5：1；Single compacting process be：First by described in Mixture suppresses 30min under 25MPa, and 60min is then suppressed under 60MPa, most after suppressing 15min under 15MPa.
4）The adobe is dried（Drying temperature is 140 DEG C, drying time 40h）, fire（First from 35 DEG C with 1 DEG C/min is warming up to 240 DEG C and keeps the temperature 2h, then 1150 DEG C are warming up to 3 DEG C/min and keep the temperature 5h, finally with 1.5 DEG C/min liters Temperature is to 1780 DEG C and keeps the temperature 2h）, natural cooling be made the high strength cement kiln refractory brick A3.
Comparative example 1
Method according to embodiment 1 carries out that refractory brick B1 is made, unlike, step 3）The first mixture is not used.
Comparative example 2
Method according to embodiment 1 carries out that refractory brick B2 is made, unlike, step 3）The second mixture is not used.
Comparative example 3
Method according to embodiment 1 carries out that refractory brick B3 is made, unlike, step 3）Carbon fiber is not used.
Detect example 1
The method recorded according to GB/T3002-2004 detects the flexural strength of above-mentioned refractory brick（First refractory brick is existed before detection 0.5h is handled at 1400 DEG C）, concrete outcome is shown in Table 1.
Table 1
Refractory brick A1 A2 A3 B1 B2 B3
Flexural strength（Mpa） 8.1 8.3 8.2 5.1 6.8 5.3
The preferred embodiment of the present invention described in detail above, still, the tool during present invention is not limited to the embodiments described above Body details, in the range of the technology design of the present invention, can carry out a variety of simple variants, these letters to technical scheme Monotropic type belongs to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should equally be considered as content disclosed in this invention.

Claims (10)

1. a kind of preparation method of high strength cement kiln refractory brick, it is characterised in that the preparation method includes：
1）Magnesium aluminate spinel, boron nitride, perlite, diatomite, iron scale powder, sodium metasilicate, cyclodextrin and water are mixed, are aged The first mixture is made；
2）By bauxite, mullite, aluminium ore slag, carborundum, aluminium oxide, zircon sand, calcium lignosulfonate, sodium metasilicate, cyclodextrin Mixed, be aged so that the second mixture is made with water；
3）Second mixture is suppressed so that brick sandwich layer is made, then the first mixture is compounded in the top of brick sandwich layer Suppressed respectively with bottom so that adobe is made；
4）The adobe is dried, is fired, is cooled down so that the high strength cement kiln refractory brick is made；
Wherein, in step 3）In, it is provided with carbon fiber between the brick sandwich layer and the first mixture.
2. preparation method according to claim 1, wherein, in step 1）In, the magnesium aluminate spinel, boron nitride, pearl Rock, diatomite, iron scale powder, sodium metasilicate, cyclodextrin, the weight ratio of water are 10：0.8-1.5：3-5：2.5-4：6-9：2-4：3.5- 4.5：25-35；
Preferably, the magnesium aluminate spinel, boron nitride, perlite, diatomaceous average grain diameter each stand alone as 0.5-2.5mm.
3. preparation method according to claim 1 or 2, wherein, in step 2）In, the bauxite, mullite, aluminium ore Slag, carborundum, aluminium oxide, zircon sand, calcium lignosulfonate, sodium metasilicate, the weight ratio of cyclodextrin and water are 10：6-9：2-4：1- 1.6：2-2.4：3-4.5：2-4：1-3：3.5-4.5：30-50；
Preferably, the bauxite, mullite, aluminium ore slag, carborundum, aluminium oxide, the average grain diameter of zircon sand are each stood alone as 1.8-3mm。
4. preparation method according to claim 3, wherein, in step 1）-2）In, the mixing is satisfied by the following conditions： Mixing temperature is 30-40 DEG C, incorporation time 40-60min.
5. preparation method according to claim 3, wherein, in step 1）-2）In, the ageing is satisfied by the following conditions： Aging Temperature is 45-60 DEG C, digestion time 10-20h.
6. preparation method according to claim 3, wherein, in step 3）In, first mixture, the second mixture, The weight ratio 10 of carbon fiber：3-5：0.6-1.
7. the preparation method according to any one in claim 1-2,4-6, wherein, in step 3）In, the compacting Process is：The mixture is first suppressed into 20-30min under 20-25MPa, then suppresses 40-60min under 40-60MPa, Most after suppressing 10-15min under 10-15MPa.
8. preparation method according to claim 7, wherein, in step 4）In, the drying meets the following conditions：Dry temperature Spend for 125-140 DEG C, drying time 30-40h.
9. preparation method according to claim 7, wherein, in step 4）In, the firing is：First from 15-35 DEG C with 0.5-1 DEG C/min is warming up to 210-240 DEG C and keeps the temperature 1-2h, is then warming up to 1050-1150 DEG C with 2.5-3 DEG C/min and keeps the temperature 3-5h, is finally warming up to 1760-1780 DEG C with 1-1.5 DEG C/min and keeps the temperature 1-2h；
Preferably, the cooling is carried out by the way of natural cooling.
10. a kind of high strength cement kiln refractory brick, it is characterised in that the high strength cement kiln refractory brick will by right The preparation method in 1-9 described in any one is asked to be prepared.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113248267A (en) * 2021-03-29 2021-08-13 宜兴市海科窑炉工程有限公司 High-strength silicon carbide composite refractory brick for garbage incinerator and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002121065A (en) * 2000-10-10 2002-04-23 Shinagawa Refract Co Ltd Refractory for converter tapping hole
CN1370136A (en) * 1999-06-07 2002-09-18 联合矿物产品公司 Lightweight dry refractory
CN1761635A (en) * 2003-02-07 2006-04-19 联合矿物产品公司 Crack-resistant dry refractory

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1370136A (en) * 1999-06-07 2002-09-18 联合矿物产品公司 Lightweight dry refractory
JP2002121065A (en) * 2000-10-10 2002-04-23 Shinagawa Refract Co Ltd Refractory for converter tapping hole
CN1761635A (en) * 2003-02-07 2006-04-19 联合矿物产品公司 Crack-resistant dry refractory

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113248267A (en) * 2021-03-29 2021-08-13 宜兴市海科窑炉工程有限公司 High-strength silicon carbide composite refractory brick for garbage incinerator and preparation method thereof

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