CN102261845A - Heat insulation integral composite brick with corundum-mullite structure and preparation method - Google Patents
Heat insulation integral composite brick with corundum-mullite structure and preparation method Download PDFInfo
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- CN102261845A CN102261845A CN2011101504613A CN201110150461A CN102261845A CN 102261845 A CN102261845 A CN 102261845A CN 2011101504613 A CN2011101504613 A CN 2011101504613A CN 201110150461 A CN201110150461 A CN 201110150461A CN 102261845 A CN102261845 A CN 102261845A
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Abstract
The invention provides a heat insulation integral composite brick with a corundum-mullite structure, and is characterized by comprising a corundum-mullite heavy work layer and a light heat insulation layer made of raw materials, namely light aggregate and powder; the heavy work layer and the light heat insulation layer are compounded to prepare a composite brick; a length size proportion of the heavy work layer to the light heat insulation layer is (1-5):(3-1). The invention further provides a preparation method of heat insulation integral composite brick with a corundum-mullite structure. The brick provided by the invention has good wear resistance, high structural strength and good heat insulation performance.
Description
Technical field
The present invention relates to refractory material, especially a kind of corundum-mullite matter structural heat-insulation integrative composite brick and preparation method's composite brick and preparation method.
Background technology
High temperature resistant heat insulation material is the key component of Thermal Equipment such as various kilns, and high temperature resistant heat insulation material directly contacts flame, requires not only high temperature resistant but also heat-insulating and energy-saving, and is high especially to the performance requirement of material.Exploitation lightweight, high-strength, good thermal shock stability, serviceability temperature high energy satisfy the required material of light structures high temperature kiln, shortcomings such as the thermal capacity that changes conventional high-temperature kiln employing heavy material and exist is big, heating rate is little, energy consumption is big, service life is short, the construction maintenance capacity is big are to build resource-conserving and friendly environment society's service.
Alumina hollow ball is used widely in the heat insulation field of fire resistant heat preserving, and hollow ball has utilized the big characteristics of enclosed cavity thermal resistance, good heat-insulation effect, and the intensity height, high temperature resistant, anti-strip.The lightweight alumina hollow ball product has overcome that the foamed alumina product strength is low, the characteristics of high-temperature creep resistance difference, not only can directly contact flame, can also use as thermal insulation layer, but its refractoriness under load awaits further raising, after particularly furnace life is improved, because the volatilization of the low melting point in flue gas composition enters and long-time creep effect easily causes the furnace lining distortion interior prominent, furnace roof subsides.
Summary of the invention
In order to overcome existing fire-resistant composite brick and preparation method's the deficiency that wearability is relatively poor, structural strength is lower, thermal and insulating performance is relatively poor, the invention provides a kind of wearability is good, structural strength is higher, thermal and insulating performance is good corundum-mullite matter structural heat-insulation integrative composite brick and preparation method.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of corundum-mullite matter structural heat-insulation integrative composite brick, comprise corundum mullite rock heavy working lining, with be the light heat insulation layer of feedstock production with aglite and powder, the compound composite brick of making of heavy working lining and light heat insulation layer, the length dimension ratio of heavy working lining and light heat insulation layer is 1～5: 3～1.
Preferably, the chemical constituent quality percentage composition in the described heavy working lining is as follows: Al wherein
2O
3〉=72%, SiO
2% is 5～28%, other compositions that all the other are introduced for raw material;
Further, the raw material in the described heavy working lining is made up of corundum and mullite.
Further, the aglite that described light heat insulation layer adopted is one or more in alumina hollow ball, magnalium hollow ball, corundum bollow ball, pink fused alumina hollow ball, the fused alumina zirconia hollow ball.
In the described light heat insulation layer, the aglite chemical constituent quality percentage composition of various kinds is as follows: 1) alumina hollow ball, wherein Al
2O
3Greater than 98%; 2) magnalium hollow ball, wherein Al
2O
3Be 0.1～99.9%, MgO is 0.1～99.9%; 3) corundum bollow ball, wherein Al
2O
3Greater than 93%; 4) pink fused alumina hollow ball, wherein Al
2O
3Be 70～99.9%, Cr
2O
3Be 0.1～30%; 5) fused alumina zirconia hollow ball, wherein Al
2O
3Be 90～99.9%, ZrO
2Be 0.1～10%, other compositions that all the other are introduced for raw material.
A kind of preparation method of corundum-mullite matter structural heat-insulation integrative composite brick, described preparation method's step is as follows:
(1) heavy working lining batching:
Chemical constituent quality percentage composition in the described heavy working lining is as follows: Al wherein
2O
3〉=72%, SiO
2% is 5～28%, other compositions that all the other are introduced for raw material.Described batching is selected two or more in silica, mullite, flint clay and the alumine for use, and is standby with adding the bond mixing by proportioning;
(2) light heat insulation layer batching:
The light heat insulation layer characteristic is selected the mixture of one or more aglites in alumina hollow ball, magnalium hollow ball, corundum bollow ball, pink fused alumina hollow ball, the fused alumina zirconia hollow ball for use, by ratio requirement aglite, powder with add the bond mixing;
(3) moulding:
Finish after the batching, with dividing plate the material chamber of mould is divided into two parts, the length dimension ratio of fine and close working lining and light heat insulation layer is 1～5: 3～1, and reinforced back is extracted dividing plate out, adopts vibration pressurization or mechanical pressing;
(4) burn till:
Base substrate taking-up after moulding loading of kiln after 80～150 ℃ of oven dry was burnt till in 1600～1750 ℃ of insulations in 3～8 hours.
Further, in the described step (3), forming process is carried out on vibration press, frictional press or hydraulic press.
In the described step (1), the feed particles grating that the heavy working lining adopts less than 1mm particle 25～35%, is not more than 325 order fine powders 25～35% for being not less than 1mm particle 35～45%, adds bond 3～5%; The time will be not more than 325 powder materials earlier in batching and prepare the back in proportion and mix in ball mill, and mix the back and add the powder that mixes with adding bond at all the other particless of aggregates again, mixing time is 10～30 minutes.
In the described step (2), the aglite particle diameter that described light heat insulation layer adopts is 0.2～5mm, natural bulk density 0.3～1.0g/cm
3, raw material mass mixture ratio is an aglite 55～70% in the light heat insulation layer, is not more than 325 order fine powders 30～45%, add bond 6～10%, when batching earlier aglite in proportion with add bond and mix, add powder then in proportion, mixing time is 10～30 minutes.
The used bond that adds is a kind of in yellow starch gum, phosphoric acid solution, phosphate dihydrogen aluminum solution, aluminium glue, silica gel, spent pulping liquor, the lignosulfonic acid salting liquid.
Technical conceive of the present invention is: for further prolonging furnace service life, for satisfying energy-saving and cost-reducing requirement, utilize research institute's proprietary technology to develop corundum hollow sphere structure heat-insulating integrated composite brick, the compact high-alumina supporting layer is used for load-bearing, improve kiln compactness simultaneously and reduce high-temerature creep, light heat insulation layer is mainly used in heat insulation and improves thermal shock resistance, so that further improve furnace life, reaches energy saving purposes.Notice when building kiln by laying bricks or stones that light layer contact flame does not improve the life-span effect otherwise have.
Beneficial effect of the present invention mainly shows: wearability is good, structural strength is higher, thermal and insulating performance is good.
Description of drawings
Fig. 1 is a corundum mullite rock structural heat-insulation integrative composite brick structure chart.
Among the figure: 1, heavy working lining, 2, light heat insulation layer.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1, a kind of corundum-mullite matter structural heat-insulation integrative composite brick, comprise corundum mullite rock heavy working lining 1, with be the light heat insulation layer 2 of feedstock production with aglite and powder, heavy working lining 1 and the light heat insulation layer 2 compound composite bricks of making, the length dimension ratio of heavy working lining 1 and light heat insulation layer 2 is 1～5: 3～1.
Preferably, the chemical constituent quality percentage composition in the described heavy working lining is as follows: Al wherein
2O
3〉=72%, SiO
2% is 5～28%, other compositions that all the other are introduced for raw material;
Raw material in the described heavy working lining is made up of corundum and mullite.
The aglite that described light heat insulation layer adopted is one or more in alumina hollow ball, magnalium hollow ball, corundum bollow ball, pink fused alumina hollow ball, the fused alumina zirconia hollow ball.
In the described light heat insulation layer, the aglite chemical constituent quality percentage composition of various kinds is as follows: 1) alumina hollow ball, wherein Al
2O
3Greater than 98%; 2) magnalium hollow ball, wherein Al
2O
3Be 0.1～99.9%, MgO is 0.1～99.9%; 3) corundum bollow ball, wherein Al
2O
3Greater than 93%; 4) pink fused alumina hollow ball, wherein Al
2O
3Be 70～99.9%, Cr
2O
3Be 0.1～30%; 5) fused alumina zirconia hollow ball, wherein Al
2O
3Be 90～99.9%, ZrO
2Be 0.1～10%, other compositions that all the other are introduced for raw material.
The used bond that adds is a kind of in yellow starch gum, phosphoric acid solution, phosphate dihydrogen aluminum solution, aluminium glue, silica gel, spent pulping liquor, the lignosulfonic acid salting liquid.
Corundum-mullite matter heavy working lining, high temperature creep-resisting; Light heat insulation layer plays heat-blocking action, and has high-heat resistance shock resistant.
Embodiment 1
Raw material and quality percentage composition thereof that present embodiment heavy working lining is adopted are:
Wherein, the mullite trade mark is SM-72.
By said ratio, the quality percentage composition Al of gained heavy components of working layer
2O
3Be 45%, SiO
2Be 50%, other compositions that all the other are introduced for raw material.
Raw material that light heat insulation layer adopted and quality percentage composition thereof are: alumina hollow ball 35%, is not more than 325 order mullite powder 45%, adds bond silica gel 10%, the quality percentage composition Al of composition in the used alumina hollow ball fused alumina zirconia hollow ball 20%
2O
3Be 99%, the quality percentage composition Al of composition in the fused alumina zirconia hollow ball
2O
3Be 99.9%, ZrO
2Be 0.1%.
Corundum mullite rock structural heat-insulation integrative composite brick manufacture method may further comprise the steps:
(1) batching:
The heavy working lining: earlier particles of aggregates and bond are prepared in proportion and mix in ball mill, adding is not more than 325 purpose powders again, stirs standby after 30 minutes;
The high-strength light thermal insulation layer: the bubble lightweight aggregate is mixed with bond in proportion, adds in proportion then and be not more than 325 purpose powders, stir 30 minutes standby.
(2) moulding: finish after the batching, with dividing plate the material chamber of mould is divided into two parts, the length dimension ratio of heavy working lining and high-strength light thermal insulation layer is 5: 1, and reinforced back is extracted dividing plate out, adopts hydraulic press compression moulding.
(3) burn till: the loading of kiln after 80 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1600 ℃ of insulations in 8 hours.
Raw material and quality percentage composition thereof that present embodiment heavy working lining is adopted are:
Wherein, the mullite trade mark is SM-72.
By said ratio, the quality percentage composition Al of gained heavy components of working layer
2O
3Be 75%, SiO
2Be 20%, other compositions that all the other are introduced for raw material.
Raw material that light heat insulation layer adopted and quality percentage composition thereof are: corundum bollow ball 65%, be not more than 325 height of eye bauxites 35%, add bond phosphate dihydrogen aluminum solution 10%, composition quality percentage composition Al in the used corundum bollow ball
2O
3Be 94%.
Corundum mullite rock structure heat-insulating integrated composite brick manufacture method may further comprise the steps:
(1) batching:
The heavy working lining: earlier particles of aggregates and bond are prepared in proportion and mix in ball mill, adding is not more than 325 purpose powders again, stirs standby after 10～30 minutes;
The high-strength light thermal insulation layer: the bubble lightweight aggregate is mixed with bond in proportion, add in proportion then alumine stir 10～30 minutes standby.
(2) moulding: finish after the batching, with dividing plate the material chamber of mould is divided into two parts, the length dimension ratio of heavy working lining and high-strength light thermal insulation layer is 1: 3, and reinforced back is extracted dividing plate out, adopts the compression moulding of vibration press.
(3) burn till: the loading of kiln after 150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1750 ℃ of insulations in 3 hours.
Embodiment 3:
Raw material and quality percentage composition thereof that present embodiment heavy working lining is adopted are:
Wherein, the mullite trade mark is SM-72.
By said ratio, the quality percentage composition Al of gained heavy components of working layer
2O
3Be 60%, SiO
2Be 35%, other compositions that all the other are introduced for raw material.
Raw material that light heat insulation layer adopted and quality percentage composition thereof are: pink fused alumina hollow ball 70%, be not more than 325 height of eye bauxites 30%, add bond phosphoric acid solution 8%, the composition quality percentage composition Al in the used pink fused alumina hollow ball
2O
3Be 99.9%, Cr
2O
3Be 0.1%.
Corundum mullite rock structural heat-insulation integrative composite brick manufacture method may further comprise the steps:
(1) batching:
The heavy working lining: earlier particles of aggregates and bond are prepared in proportion and mix in ball mill, adding is not more than 325 purpose powders again, stirs standby after 20 minutes;
The high-strength light thermal insulation layer: pink fused alumina bubble lightweight aggregate is mixed with bond in proportion, add in proportion then alumine stir 20 minutes standby.
(2) moulding: finish after the batching, with dividing plate the material chamber of mould is divided into two parts, the length dimension ratio of heavy working lining and high-strength light thermal insulation layer is 5: 2, and reinforced back is extracted dividing plate out, adopts the compression moulding of vibration press.
(3) burn till: the loading of kiln after 110 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1700 ℃ of insulations in 4 hours.
Embodiment 4:
Raw material and quality percentage composition thereof that present embodiment heavy working lining is adopted are:
Wherein, the mullite trade mark is SM-72.
By said ratio, the quality percentage composition Al of gained heavy components of working layer
2O
3Be 65%, SiO
2Be 30%, other compositions that all the other are introduced for raw material.
Raw material that light heat insulation layer adopted and quality percentage composition thereof are: magnalium hollow ball 65%, be not more than 325 height of eye bauxites 35%, add bond lignosulfonic acid salting liquid 6%, composition quality percentage composition Al in the used magnalium hollow ball
2O
3Be 0.1%, MgO is 99.9%.
Corundum mullite rock structural heat-insulation integrative composite brick manufacture method may further comprise the steps:
(1) batching:
The heavy working lining: earlier particles of aggregates and bond are prepared in proportion and mix in ball mill, adding is not more than 325 purpose powders again, stirs standby after 30 minutes;
The high-strength light thermal insulation layer: pink fused alumina bubble lightweight aggregate is mixed with bond in proportion, add in proportion then alumine stir 30 minutes standby.
(2) moulding: finish after the batching, with dividing plate the material chamber of mould is divided into two parts, the length dimension ratio of heavy working lining and high-strength light thermal insulation layer is 5: 1, and reinforced back is extracted dividing plate out, adopts hydraulic press compression moulding.
(3) burn till: the loading of kiln after 80 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1750 ℃ of insulations in 5 hours.
Claims (10)
1. corundum-mullite matter structural heat-insulation integrative composite brick, it is characterized in that: comprise corundum mullite rock heavy working lining, with be the light heat insulation layer of feedstock production with aglite and powder, the compound composite brick of making of heavy working lining and light heat insulation layer, the length dimension ratio of heavy working lining and light heat insulation layer is 1～5: 3～1.
2. corundum-mullite matter structural heat-insulation integrative composite brick according to claim 1 is characterized in that: the chemical constituent quality percentage composition in the described heavy working lining is as follows: Al wherein
2O
3〉=72%, SiO
2% is 5～28%, other compositions that all the other are introduced for raw material.
3. corundum-mullite matter structural heat-insulation integrative composite brick according to claim 1 and 2 is characterized in that: the raw material in the described heavy working lining is made up of corundum and mullite.
4. corundum-mullite matter structural heat-insulation integrative composite brick according to claim 1 and 2 is characterized in that: the aglite that described light heat insulation layer adopted is one or more in alumina hollow ball, magnalium hollow ball, corundum bollow ball, pink fused alumina hollow ball, the fused alumina zirconia hollow ball.
5. corundum-mullite matter structural heat-insulation integrative composite brick according to claim 4 is characterized in that: in the described light heat insulation layer, the aglite chemical constituent quality percentage composition of various kinds is as follows: 1) alumina hollow ball, wherein Al
2O
3Greater than 98%; 2) magnalium hollow ball, wherein Al
2O
3Be 0.1～99.9%, MgO is 0.1～99.9%; 3) corundum bollow ball, wherein Al
2O
3Greater than 93%; 4) pink fused alumina hollow ball, wherein Al
2O
3Be 70～99.9%, Cr
2O
3Be 0.1～30%; 5) fused alumina zirconia hollow ball, wherein Al
2O
3Be 90～99.9%, ZrO
2Be 0.1～10%, other compositions that all the other are introduced for raw material.
6. the preparation method of a corundum-mullite matter structural heat-insulation integrative composite brick as claimed in claim 1, it is characterized in that: described preparation method's step is as follows:
(1) heavy working lining batching:
Chemical constituent quality percentage composition in the described heavy working lining is as follows: Al wherein
2O
3〉=72%, SiO
2% is 5～28%, other compositions that all the other are introduced for raw material.Described batching is selected two or more in silica, mullite, flint clay and the alumine for use, and is standby with adding the bond mixing by proportioning;
(2) light heat insulation layer batching:
The light heat insulation layer characteristic is selected the mixture of one or more aglites in alumina hollow ball, magnalium hollow ball, corundum bollow ball, pink fused alumina hollow ball, the fused alumina zirconia hollow ball for use, by ratio requirement aglite, powder with add the bond mixing;
(3) moulding:
Finish after the batching, with dividing plate the material chamber of mould is divided into two parts, the length dimension ratio of fine and close working lining and light heat insulation layer is 1～5: 3～1, and reinforced back is extracted dividing plate out, adopts vibration pressurization or mechanical pressing;
(4) burn till:
Base substrate taking-up after moulding loading of kiln after 80～150 ℃ of oven dry was burnt till in 1600～1750 ℃ of insulations in 3～8 hours.
7. the preparation method of corundum-mullite matter structural heat-insulation integrative composite brick according to claim 6 is characterized in that: in the described step (3), forming process is carried out on vibration press, frictional press or hydraulic press.
8. according to the preparation method of claim 6 or 7 described corundum-mullite matter structural heat-insulation integrative composite bricks, it is characterized in that: in the described step (1), the feed particles grating that the heavy working lining adopts is for being not less than 1mm particle 35～45%, less than 1mm particle 25～35%, be not more than 325 order fine powders 25～35%, add bond 3～5%; The time will be not more than 325 powder materials earlier in batching and prepare the back in proportion and mix in ball mill, and mix the back and add the powder that mixes with adding bond at all the other particless of aggregates again, mixing time is 10～30 minutes.
9. according to the preparation method of claim 6 or 7 described corundum-mullite matter corundum-mullite matter structural heat-insulation integrative composite bricks, it is characterized in that: in the described step (2), the aglite particle diameter that described light heat insulation layer adopts is 0.2～5mm, natural bulk density 0.3～1.0g/cm
3, raw material mass mixture ratio is an aglite 55～70% in the light heat insulation layer, is not more than 325 order fine powders 30～45%, add bond 6～10%, when batching earlier aglite in proportion with add bond and mix, add powder then in proportion, mixing time is 10～30 minutes.
10. according to the preparation method of claim 6 or 7 described corundum-mullite matter structural heat-insulation integrative composite bricks, it is characterized in that: the used bond that adds is a kind of in yellow starch gum, phosphoric acid solution, phosphate dihydrogen aluminum solution, aluminium glue, silica gel, spent pulping liquor, the lignosulfonic acid salting liquid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101504613A CN102261845A (en) | 2011-06-06 | 2011-06-06 | Heat insulation integral composite brick with corundum-mullite structure and preparation method |
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|---|---|---|---|
| CN2011101504613A CN102261845A (en) | 2011-06-06 | 2011-06-06 | Heat insulation integral composite brick with corundum-mullite structure and preparation method |
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| CN102584306A (en) * | 2012-03-26 | 2012-07-18 | 苏州罗卡节能科技有限公司 | Magnesium three-layer composite brick and preparation method thereof |
| CN103265301A (en) * | 2013-05-29 | 2013-08-28 | 湖南华联特种陶瓷有限公司 | Fire-resistant case for annealing sapphire and production method thereof |
| CN106938923A (en) * | 2017-04-06 | 2017-07-11 | 新密市中建耐火材料厂 | The beautiful wear-resisting composite brick of silicon steel |
| CN112194470A (en) * | 2020-09-14 | 2021-01-08 | 江苏国豪耐火科技有限公司 | Chromium corundum composite brick for rotary kiln of hazardous waste incinerator and preparation method thereof |
| CN112409000A (en) * | 2020-11-24 | 2021-02-26 | 湖南仁海科技材料发展有限公司 | Mullite push plate for ceramic metallization furnace and preparation method thereof |
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Application publication date: 20111130 |