CN103058685A - Medium-density silicon mullite brick used for rotary kiln and preparation method thereof - Google Patents

Medium-density silicon mullite brick used for rotary kiln and preparation method thereof Download PDF

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Publication number
CN103058685A
CN103058685A CN2013100291248A CN201310029124A CN103058685A CN 103058685 A CN103058685 A CN 103058685A CN 2013100291248 A CN2013100291248 A CN 2013100291248A CN 201310029124 A CN201310029124 A CN 201310029124A CN 103058685 A CN103058685 A CN 103058685A
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parts
mullite brick
rotary kiln
density
siliceous mullite
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CN2013100291248A
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王家邦
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Suzhou Low Carbon Energy Saving Technology Co Ltd
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Suzhou Low Carbon Energy Saving Technology Co Ltd
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Abstract

The invention discloses a medium-density silicon mullite brick used for a rotary kiln and a preparation method thereof. The density of a product is reduced by introducing lightweight aggregate into a silicon mullite brick, and the medium-density silicon mullite brick adopts the following raw materials in parts by weight: 25-30 parts of 3-8mm high-alumina bauxite, 10-20 parts of 0-3mm high-alumina bauxite, 11-15 parts of high-alumina bauxite of not more than 180 meshes, 3-5 parts of 0-1mm silicon carbide, 6-12 parts of silicon carbide of not more than 180 meshes, 4-10 parts of andalusite powder of not more than 180 meshes, 4-6 parts of clay, 10-30 parts of lightweight aggregate and 4-8 parts of additional binding agent. The preparation process comprises the steps of mixing, shaping, drying, firing and the like. Compared with a high-density silicon mullite brick, the medium-density silicon mullite brick prepared by the invention has the advantages of low heat conductivity, light weight and the like; and during the using process, the radiation loss can be reduced, the consumption of energy and equipment power can be reduced, and the effects of improving a working environment, saving energy and reducing emission can be realized.

Description

Density siliceous mullite brick and preparation method thereof during rotary kiln is used
Technical field
The present invention relates to a kind of middle density siliceous mullite brick and preparation method thereof, belong to technical field of refractory materials.
Background technology
Along with the continuous appearance of manufacture of cement new technology, the manufacture of cement main process equipment increases output, improves quality, saves energy and reduce the cost, reduces cost becomes increases benefit in the production management key to the maximization future development.Existing refractory brick and insulating brick are single structure mostly, need during use the brick of various performances is used in conjunction with, if on relatively fixed equipment, such as tunnel furnace, down-draft kiln, are used in conjunction with and can both meet the demands; But on the equipment of some relative movement, such as rotary kiln, be used in conjunction with and just be difficult to meet the demands.Some producers and research unit are studied this and tackle key problems, and have released the composite brick that some heavys and lightweight combine, but because lightweight working lining structural strength is excessively low, and can't satisfy service requirements and do not promote on a large scale, or take the heavy brick as main.Take present existing rotary kiln as example, front transitional zone uses spinel brick, clinkering zone to use magnesia chrome brick, since the thermal conductivity of the magnesia chrome brick that spinel brick and clinkering zone use large (〉=2.7W/mK) so that kiln cylinder body outside wall temperature higher (about about 380 ℃, can reach 420 ℃ during high temperature greatly).The cylinder body outer wall temperature is higher, the kiln cylinder body heat radiation is increased, thereby strengthen heat consumption of clinker, causes that the grog unit cost increases; Very easily make on the other hand the cylindrical shell expanded by heating, cause kiln middle part support roller Wa Wendu to raise, especially using the normal operation to equipment of later stage or summer to bring larger hidden danger.Cylindrical shell is the excessively heat gain damage probability of mechanical means, accelerated barrel distortion, and barrel distortion has accelerated the physical disturbance of liner, consequently falls brick, stop kiln, affects the operation factor of cement rotary kiln.If therefore can use at this position composite brick fire-resistant, heat insulation dual-use function that the barrel temperature at transitional zone position is reduced, reduce heat lost by radiation, and be conducive to maintenance of the equipment, improve operation rate.Although use heavy lightweight stratiform composite brick can obviously reduce heat lost by radiation, but the bonding strength between heavy layer and the light layer and Performance Match are insoluble problems always, the present invention reduces product density by introduce aglite in the high-density siliceous mullite brick, then can avoid this problem to produce, can reach same energy-saving effect simultaneously.
Summary of the invention
The purpose of this invention is to provide density siliceous mullite brick in a kind of rotary kiln usefulness, prepared middle density siliceous mullite brick has the advantages such as the heat conduction number is low, and thermal shock resistance is good, and is lightweight.The invention also discloses the preparation method of density siliceous mullite brick in this rotary kiln usefulness.
The technical solution adopted in the present invention is: density siliceous mullite brick during rotary kiln is used, its component comprises particulate material, powder, wedding agent and aglite.
The density of density siliceous mullite brick was 1.8 ~ 2.3g/cm3 during described rotary kiln was used.
Described aglite is at least a in corundum bollow ball, alumina hollow ball, aluminium titanium hollow ball, Magnalium hollow ball, hollow chrome corundum spheres, Zirconia corundum hollow sphere, corundum-mullite hollow ball, light ceramic, the light-weight mullite aggregate.
The granularity specification of described aglite is at least a among 0 ~ 1mm, 0 ~ 3mm, the 0 ~ 5mm.
Described particulate material includes: the silicon carbide of the alumine of 3 ~ 8mm, the alumine of 0~3mm, 0~1mm.
Described powder includes: be not more than 180 purpose andaluzite powder, clay, be not more than 180 purpose alumines, be not more than 180 purpose silicon carbide.
Described wedding agent is a kind of in industrial lignin sulfonic acid salts solution, methocel solution, the yellow starch gum liquation.
In the feed composition of described middle density siliceous mullite brick, by weight, include: 10 ~ 20 parts of the alumines of 25 ~ 30 parts of the alumines of 3 ~ 8mm, 0~3mm, be not more than 11 ~ 15 parts of 180 purpose alumines, 0~1mm 3 ~ 5 parts in silicon carbide, be not more than 6 ~ 12 parts in 180 purpose silicon carbide, be not more than 180 4 ~ 10 parts in purpose andaluzite powder, 4 ~ 6 parts of clays, 10 ~ 30 parts of aglites, add 4~8 parts of wedding agents.
Rotary kiln of the present invention with in the advantage that has of density siliceous mullite brick be: thermal conductivity is low, thermal shock resistance good, lightweight.The density siliceous mullite brick increased aglite and has reduced product density during rotary kiln of the present invention was used in high-density siliceous mullite brick component commonly used.Simultaneously because the thermal conductivity of aglite is lower, then make this rotary kiln with in the density siliceous mullite brick have lower thermal conductivity.And aglite can with the preferably combination of other components, thereby this rotary kiln with in the thermal shock resistance of density siliceous mullite brick better.After tested, the density of density siliceous mullite brick was that 1.8 ~ 2.3g/cm3,350 ℃ of thermal conductivitys are not more than mean density and the thermal conductivity that 0.7W/m.k all is lower than the high-density siliceous mullite brick during this rotary kiln was used.And this rotary kiln with in the density siliceous mullite brick be not less than 60MPa, can satisfy the needs of actual use.That is: this rotary kiln with in can reduce heat lost by radiation in the use procedure of density siliceous mullite brick, reduce the energy and equipment dynamic consumption, play the effect that improves Working environment and energy-saving and emission-reduction.
The preparation method of density siliceous mullite brick during this rotary kiln is used may further comprise the steps successively:
A, batching: particulate material and aglite and wedding agent are mixed in proportion, add in proportion again powder stirring even;
B, moulding: the equal refining that steps A is formed adds in the mould mechanical pressing;
C, drying and burn till: the base substrate that step B is formed is after 80~150oC oven dry, and loading of kiln forms finished product in 1450 ~ 1550oC insulation, 4~8h.
Among the described step B during mechanical pressing breakage rate of aglite be not more than 15%.。
The method guaranteed preferably this rotary kiln with in the mass parameter of density siliceous mullite brick, and processing parameter, method, equipment all have no special requirements, and is easy to realize.
Embodiment
[0017] the following stated only is preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
In following examples: aglite is at least a in corundum bollow ball, alumina hollow ball, aluminium titanium hollow ball, Magnalium hollow ball, hollow chrome corundum spheres, Zirconia corundum hollow sphere, corundum-mullite hollow ball, light ceramic, the light-weight mullite aggregate.Particulate material includes: the silicon carbide of the alumine of 3 ~ 8mm, the alumine of 0~3mm, 0~1mm.Powder includes: be not more than 180 purpose andaluzite powder, clay, be not more than 180 purpose alumines, be not more than 180 purpose silicon carbide.Wedding agent is a kind of in industrial lignin sulfonic acid salts solution, methocel solution, the yellow starch gum liquation.Make the density of density siliceous mullite brick in this rotary kiln usefulness be by adding aglite and mechanical pressing: 1.8 ~ 2.3g/cm3.
Embodiment 1
The raw material that adopts in the present embodiment and weight part are: 30 parts of 3 ~ 8mm alumines, 10 parts of 0~3mm alumines, be not more than 15 parts of 180 height of eye bauxitic clays, 5 parts in 0~1mm silicon carbide, be not more than 6 parts in 180 order silicon carbide, be not more than 10 parts in 180 order andaluzite powder, 4 parts of clays, 20 parts of 0 ~ 5mm corundum bollow balls add 4 parts of wedding agent industry lignin sulfonic acid salts solutions.The preparation method may further comprise the steps:
A, batching: particulate material and aglite and wedding agent are mixed in proportion, add in proportion again powder stirring even;
B, moulding: the equal refining that steps A is formed adds in the mould, and vibrating forming is base substrate on the vibrations press, and vibrations pressure is 30 tons, and product density is 2.2g/cm3, hollow ball percentage of damage 15%;
C, drying and burn till: the base substrate that step B is formed after the 150oC oven dry, loading of kiln in 1500oC insulation 6h form the finished product rotary kiln with in the density siliceous mullite brick.
The granularity of corundum bollow ball also can be a kind of among 0 ~ 1mm, the 0 ~ 3mm in the present embodiment, or granularity is at least 2 kinds arbitrary combination among 0 ~ 1mm, 0 ~ 3mm, the 0 ~ 5mm.
Embodiment 2
The raw material that adopts in the present embodiment and weight part are: 25 parts of 3 ~ 8mm alumines, 20 parts of 0~3mm alumines, be not more than 11 parts of 180 height of eye bauxitic clays, 3 parts in 0~1mm silicon carbide is not more than 12 parts in 180 order silicon carbide, be not more than 4 parts in 180 order andaluzite powder, 6 parts of clays, 5 parts of 0 ~ 3mm alumina hollow balls, 5 parts of 0 ~ 1mm aluminium titanium hollow balls, 9 parts of 0 ~ 1mm Magnalium hollow balls add 8 parts of wedding agent methocel solutions.The preparation method may further comprise the steps:
A, batching: particulate material and aglite and wedding agent are mixed in proportion, add in proportion again powder stirring even;
B, moulding: the equal refining that steps A is formed adds in the mould, adopts 300 tons of press impact briquettings, and the control stroke keeps product size to fix, and it is 2.2g/cm3 that product reaches density, and the aglite percentage of damage is 12%;
C, drying and burn till: the base substrate that step B is formed after the 80oC oven dry, loading of kiln in 1450oC insulation 8h form the finished product rotary kiln with in the density siliceous mullite brick.
Embodiment 3
The raw material that adopts in the present embodiment and weight part are: 30 parts of 3 ~ 8mm alumines, 20 parts of 0~3mm alumines, be not more than 13 parts of 180 height of eye bauxitic clays, 4 parts in 0~1mm silicon carbide is not more than 10 parts in 180 order silicon carbide, is not more than 8 parts in 180 order andaluzite powder, 5 parts of clays, 5 parts of 0 ~ 3mm hollow chrome corundum spheres, 5 parts of 0 ~ 3mm Zirconia corundum hollow spheres add 5 parts of wedding agent yellow starch gum liquations.
The preparation method may further comprise the steps:
A, batching: particulate material and aglite and wedding agent are mixed in proportion, add in proportion again powder stirring even;
B, moulding: the equal refining that steps A is formed adds in the fixing mould of size, and vibrating forming is base substrate on the vibrations press, and vibrations pressure is 30 tons, and product density is 2.3g/cm3, and the aglite percentage of damage is 8%;
C, drying and burn till: the base substrate that step B is formed after the 150oC oven dry, loading of kiln in 1500oC insulation 4h form the finished product rotary kiln with in the density siliceous mullite brick.
Embodiment 4
The raw material that adopts in the present embodiment and weight part are: 25 parts of 3 ~ 8mm alumines, 20 parts of 0~3mm alumines, be not more than 11 parts of 180 height of eye bauxitic clays, 3 parts in 0~1mm silicon carbide is not more than 12 parts in 180 order silicon carbide, be not more than 10 parts in 180 order andaluzite powder, 6 parts of clays, 5 parts of 0 ~ 5mm corundum-mullite hollow balls, 5 parts of 0 ~ 3mm light ceramics, 3 parts in 0 ~ 1mm light-weight mullite aggregate adds 7 parts of wedding agent methocel solutions.The preparation method may further comprise the steps:
A, batching: particulate material and aglite and wedding agent are mixed in proportion, add in proportion again powder stirring even;
B, moulding: the equal refining that steps A is formed adds in the mould, adopts the moulding of 150 tons of press oil pressure, and the control stroke keeps product size to fix, and product density is 2.0 g/cm3, and the aglite percentage of damage is 11%;
C, drying and burn till: the base substrate that step B is formed after the 80oC oven dry, loading of kiln in 1500oC insulation 8h form the finished product rotary kiln with in the density siliceous mullite brick.
Embodiment 5
The raw material that adopts in the present embodiment and weight part are: 27 parts of 3 ~ 8mm alumines, 15 parts of 0~3mm alumines, be not more than 14 parts of 180 height of eye bauxitic clays, 3 parts in 0~1mm silicon carbide is not more than 8 parts in 180 order silicon carbide, be not more than 6 parts in 180 order andaluzite powder, 4 parts of clays, 5 parts of 0 ~ 5mm corundum-mullite hollow balls, 5 parts of 0 ~ 3mm light ceramics, 20 parts in 0 ~ 1mm light-weight mullite aggregate adds 8 parts of wedding agent methocel solutions.The preparation method may further comprise the steps:
A, batching: particulate material and aglite and wedding agent are mixed in proportion, add in proportion again powder stirring even;
B, moulding: the equal refining that steps A is formed adds in the mould, adopts the moulding of 150 tons of press oil pressure, and the control stroke keeps product size to fix, and product density is 1.8 g/cm3, and the aglite percentage of damage is 6%;
C, drying and burn till: the base substrate that step B is formed after the 110oC oven dry, loading of kiln in 1550oC insulation 4h form the finished product rotary kiln with in the density siliceous mullite brick.
Embodiment 6
Only be with the difference of embodiment 1: corundum bollow ball replaces with aluminium titanium hollow ball.
Embodiment 7
Only be with the difference of embodiment 1: corundum bollow ball replaces with magnesium titanium hollow ball.
Embodiment 8
Only be with the difference of embodiment 1: corundum bollow ball replaces with hollow chrome corundum spheres.
Embodiment 9
Only be with the difference of embodiment 1: corundum bollow ball replaces with Zirconia corundum hollow sphere.
Embodiment 10
Only be with the difference of embodiment 1: corundum bollow ball replaces with the corundum-mullite hollow ball.
Embodiment 11
Only be with the difference of embodiment 1: corundum bollow ball replaces with light ceramic.
Embodiment 12
Only be with the difference of embodiment 1: corundum bollow ball replaces with the light-weight mullite aggregate.
Embodiment 13
Only be with the difference of embodiment 1: corundum bollow ball is with at least two kinds of replacements in corundum bollow ball, alumina hollow ball, aluminium titanium hollow ball, Magnalium hollow ball, hollow chrome corundum spheres, Zirconia corundum hollow sphere, corundum-mullite hollow ball, light ceramic, the light-weight mullite aggregate, and their granularity take among 0 ~ 1mm, 0 ~ 3mm, the 0 ~ 5mm any one or multiple.
Get above embodiment gained finished product and carry out the normal experiment analysis, the parameter comparison of each end properties parameter and high-density siliceous mullite brick sees the following form:
Among the present invention prepared rotary kiln with in the performance comparison table of density siliceous mullite brick and high-density siliceous mullite brick commonly used.
? The high-density siliceous mullite brick Density siliceous mullite brick in this
Volume density (g/cm 3 2.5~2.8 1.8~2.3
Compressive strength (MPa) ≥70 ≥55
350 ℃ of thermal conductivitys (W/m.k) 0.7~1.0 0.5~0.7
1100 ℃ of water-cooleds (inferior) ≥25 ≥30
Maximum operation (service) temperature (℃) 1550 1550
As seen from the above table, the density siliceous mullite brick was for high-density siliceous mullite brick commonly used during the prepared rotary kiln of the present invention was used, have certain advantage at density, 350 ℃ of thermal conductivitys, 1100 ℃ of aspects such as water-cooled number of times of tolerance, reached service requirements in compressive strength and maximum operation (service) temperature.

Claims (10)

1. density siliceous mullite brick during rotary kiln is used, its component comprises particulate material, powder, wedding agent and aglite.
2. density siliceous mullite brick during rotary kiln according to claim 1 is used is characterized in that: the density of density siliceous mullite brick was 1.8 ~ 2.3g/cm during described rotary kiln was used 3
Rotary kiln according to claim 2 with in the density siliceous mullite brick, it is characterized in that: described aglite is at least a in corundum bollow ball, alumina hollow ball, aluminium titanium hollow ball, Magnalium hollow ball, hollow chrome corundum spheres, Zirconia corundum hollow sphere, corundum-mullite hollow ball, light ceramic, the light-weight mullite aggregate.
Rotary kiln according to claim 3 with in the density siliceous mullite brick, it is characterized in that: the granularity specification of described aglite is at least a among 0 ~ 1mm, 0 ~ 3mm, the 0 ~ 5mm.
5. density siliceous mullite brick during rotary kiln according to claim 4 is used, it is characterized in that: described particulate material includes: the silicon carbide of the alumine of 3 ~ 8mm, the alumine of 0~3mm, 0~1mm.
6. density siliceous mullite brick during rotary kiln according to claim 5 is used, it is characterized in that: described powder includes: be not more than 180 purpose andaluzite powder, clay, be not more than 180 purpose alumines, be not more than 180 purpose silicon carbide.
Rotary kiln according to claim 6 with in the density siliceous mullite brick, it is characterized in that: described wedding agent is a kind of in industrial lignin sulfonic acid salts solution, methocel solution, the yellow starch gum liquation.
8. density siliceous mullite brick during rotary kiln according to claim 7 is used, it is characterized in that: in the feed composition of described middle density siliceous mullite brick, by weight, include: 10 ~ 20 parts of the alumines of 25 ~ 30 parts of the alumines of 3 ~ 8mm, 0~3mm, be not more than 11 ~ 15 parts of 180 purpose alumines, 0~1mm 3 ~ 5 parts in silicon carbide, be not more than 6 ~ 12 parts in 180 purpose silicon carbide, be not more than 180 4 ~ 10 parts in purpose andaluzite powder, 4 ~ 6 parts of clays, 10 ~ 30 parts of aglites, add 4~8 parts of wedding agents.
9. the preparation method of each described middle density siliceous mullite brick in 8 according to claim 1 may further comprise the steps successively:
A, batching: particulate material and aglite and wedding agent are mixed in proportion, add in proportion again powder stirring even;
B, moulding: the equal refining that steps A is formed adds in the mould mechanical pressing;
C, drying and burn till: the base substrate that step B is formed is after 80~150oC oven dry, and loading of kiln forms finished product in 1450 ~ 1550oC insulation, 4~8h.
Rotary kiln according to claim 9 with in the preparation method of density siliceous mullite brick, it is characterized in that: among the described step B during mechanical pressing breakage rate of aglite be not more than 15%.
CN2013100291248A 2013-01-25 2013-01-25 Medium-density silicon mullite brick used for rotary kiln and preparation method thereof Pending CN103058685A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234346A (en) * 2013-05-10 2013-08-07 郑州瑞泰耐火科技有限公司 Low-heat-conduction multi-layer mullite brick and preparation method thereof
CN103755363A (en) * 2013-12-27 2014-04-30 郑州汇特耐火材料有限公司 Lightweight siliceous mullite composite brick and preparation method thereof
CN106242598A (en) * 2016-08-05 2016-12-21 重庆钢铁集团矿业有限公司冶金材料厂 Inner liner of rotary kiln brick, liner composite brick and manufacture method thereof
CN107117952A (en) * 2017-06-30 2017-09-01 湖南湘钢瑞泰科技有限公司 A kind of refractory brick and preparation method
CN107698247A (en) * 2017-10-30 2018-02-16 孝义市和中兴矿产有限公司 A kind of ferrosilicon bag half lightweight siliceous mullite brick and preparation method thereof
CN111718188A (en) * 2020-06-28 2020-09-29 江苏君耀耐磨耐火材料有限公司 Aluminum-zirconium brick for transition belt of super-huge rotary cement kiln
CN113716943A (en) * 2021-08-31 2021-11-30 浙江锦诚新材料股份有限公司 Silicon mullite brick for cement rotary kiln and preparation method thereof
CN114085071A (en) * 2021-12-15 2022-02-25 无锡远能耐火材料有限公司 High-chromium corundum refractory brick for high-temperature plasma melting furnace lining and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102788497A (en) * 2012-09-07 2012-11-21 厚波 Special composite firebrick for rotary kiln and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102788497A (en) * 2012-09-07 2012-11-21 厚波 Special composite firebrick for rotary kiln and preparation method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234346A (en) * 2013-05-10 2013-08-07 郑州瑞泰耐火科技有限公司 Low-heat-conduction multi-layer mullite brick and preparation method thereof
CN103755363A (en) * 2013-12-27 2014-04-30 郑州汇特耐火材料有限公司 Lightweight siliceous mullite composite brick and preparation method thereof
CN106242598A (en) * 2016-08-05 2016-12-21 重庆钢铁集团矿业有限公司冶金材料厂 Inner liner of rotary kiln brick, liner composite brick and manufacture method thereof
CN106242598B (en) * 2016-08-05 2019-05-17 重庆钢铁集团矿业有限公司冶金材料厂 Inner liner of rotary kiln brick, liner composite brick and its manufacturing method
CN107117952A (en) * 2017-06-30 2017-09-01 湖南湘钢瑞泰科技有限公司 A kind of refractory brick and preparation method
CN107698247A (en) * 2017-10-30 2018-02-16 孝义市和中兴矿产有限公司 A kind of ferrosilicon bag half lightweight siliceous mullite brick and preparation method thereof
CN111718188A (en) * 2020-06-28 2020-09-29 江苏君耀耐磨耐火材料有限公司 Aluminum-zirconium brick for transition belt of super-huge rotary cement kiln
CN113716943A (en) * 2021-08-31 2021-11-30 浙江锦诚新材料股份有限公司 Silicon mullite brick for cement rotary kiln and preparation method thereof
CN113716943B (en) * 2021-08-31 2022-09-06 浙江锦诚新材料股份有限公司 Silicon mullite brick for cement rotary kiln and preparation method thereof
CN114085071A (en) * 2021-12-15 2022-02-25 无锡远能耐火材料有限公司 High-chromium corundum refractory brick for high-temperature plasma melting furnace lining and preparation method thereof

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Application publication date: 20130424