CN101857451A - Heat-insulating integrated composite brick with alkaline structure and preparation method thereof - Google Patents
Heat-insulating integrated composite brick with alkaline structure and preparation method thereof Download PDFInfo
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- CN101857451A CN101857451A CN 201010192192 CN201010192192A CN101857451A CN 101857451 A CN101857451 A CN 101857451A CN 201010192192 CN201010192192 CN 201010192192 CN 201010192192 A CN201010192192 A CN 201010192192A CN 101857451 A CN101857451 A CN 101857451A
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- 239000011449 brick Substances 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 39
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 31
- 239000010431 corundum Substances 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011777 magnesium Substances 0.000 claims abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 54
- 238000009413 insulation Methods 0.000 claims description 40
- 239000003795 chemical substances by application Substances 0.000 claims description 38
- 239000003595 mist Substances 0.000 claims description 36
- 229910001051 Magnalium Inorganic materials 0.000 claims description 34
- 239000000395 magnesium oxide Substances 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 12
- QRNPTSGPQSOPQK-UHFFFAOYSA-N magnesium zirconium Chemical compound [Mg].[Zr] QRNPTSGPQSOPQK-UHFFFAOYSA-N 0.000 claims description 10
- 238000011068 loading method Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- NACUKFIFISCLOQ-UHFFFAOYSA-N [Mg].[Cr] Chemical compound [Mg].[Cr] NACUKFIFISCLOQ-UHFFFAOYSA-N 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 229940037003 alum Drugs 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 10
- 230000003245 working effect Effects 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 239000001095 magnesium carbonate Substances 0.000 description 6
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 6
- 235000014380 magnesium carbonate Nutrition 0.000 description 6
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- DJOYTAUERRJRAT-UHFFFAOYSA-N 2-(n-methyl-4-nitroanilino)acetonitrile Chemical compound N#CCN(C)C1=CC=C([N+]([O-])=O)C=C1 DJOYTAUERRJRAT-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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Abstract
The invention discloses a heat-insulating integrated composite brick with an alkaline structure and a preparation method thereof, comprising a heavy-weight work layer and a light-weight heat-insulating layer, wherein the heavy-weight work layer takes compacted magnesium and compacted alkaline materials as the raw materials; the light-weight heat-insulating layer takes an alumina hollow ball or an aluminum-magnesium hollow ball or a corundum hollow ball or the mixture of the three balls as the light-weight aggregate; the composite brick is composited by the heavy-weight work layer and the light-weight heat-insulating layer by vibration and pressurizing or mechanical-pressing moulding; and the proportion of the length dimension of the heavy-weight work layer and the light-weight heat-insulating layer is 1-5:2-1. The heat-insulating integrated composite brick overcomes the defect of big heat conductivity of the alkaline brick for a rotary kiln. The invention provides the heat-insulating integrated composite brick with good wear resistance, high refractoriness, good structural strength and good heat-preserving and heat-insulating performance.
Description
Technical field
The present invention relates to fire-resistant composite brick and preparation method, relate in particular to a kind of heat-insulating integrated composite brick with alkaline structure and preparation method.
Background technology
Along with the continuous appearance of manufacture of cement new technology, the manufacture of cement main process equipment develops to the maximization direction, increases output, improves the quality, saves energy and reduce the cost, reducing cost becomes the key that increases benefit in the production management.Existing refractory brick and insulating brick are single structure mostly, need during use the brick of various performances is used, if on the motionless equipment of relative fixed, as tunnel furnace, the kiln of falling the Yan, be used and can both meet the demands; But on the equipment of some relative movement,, be used and just be difficult to meet the demands as rotary kiln.Some producers and research unit study this and tackle key problems, and released the composite brick that some heavy material and light material combine, but because lightweight part-structure intensity is low excessively, can't satisfy service requirements and not popularization on a large scale, still based on the heavy brick.Rotary kiln with the 10000t/d of conch group is an example, preceding transitional zone uses spinel brick, clinkering zone to use magnesia chrome brick, since the thermal conductivity of preceding transitional zone spinel brick and clinkering zone magnesia chrome brick big (〉=2.7W/mK), make 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 the cylindrical shell expanded by heating on the other hand, cause kiln middle part support roller Wa Wendu to raise, especially using the normal operation of later stage or summer to bring big hidden danger to equipment.Trunk the is heat gain excessively damage probability of mechanical means, quickened barrel distortion, and barrel distortion has quickened the physical disturbance of liner, consequently falls brick, stop kiln, influences the operation factor of cement rotary kiln.Therefore if can use composite brick fire-resistant, heat insulation dual-use function that the barrel temperature at transitional zone and clinkering zone position is reduced, reduce heat lost by radiation, and help maintenance of the equipment, improve operation rate at this position.Composite brick as if all use compound different sites constructional feature at all high temperature positions has then solved the problem of present existence well.
For satisfying energy-saving and cost-reducing requirement, Zhejiang University's material is the advantage of ceramic institute in conjunction with this place cement and high temperature power-saving technology aspect, utilize institute's proprietary technology to carry out serial rotary kiln and develop with structure/heat-insulating integrated composite brick, heat-insulating integrated composite brick with alkaline structure is exactly one of them.
Summary of the invention
Big in order to overcome existing revolution kiln alkaline brick thermal conductivity, the object of the present invention is to provide to have that wear resistance is good, refractoriness is high, structural strength reaches the good structural heat-insulation integrative composite brick of thermal and insulating performance well.
The technical solution adopted for the present invention to solve the technical problems is:
One, a kind of heat-insulating integrated composite brick with alkaline structure:
Comprise that the compact alkaline material is the heavy working lining of raw material, and the light heat insulation layer that is mixed into aglite with alumina hollow ball or magnalium hollow ball or corundum bollow ball or three, be composited by both, the length dimension ratio of heavy working lining and light heat insulation layer is 1～5: 2～1.
Two, a kind of preparation method of heat-insulating integrated composite brick with alkaline structure:
The proportioning raw materials of A, heavy working lining and light heat insulation layer is as follows:
One, compact alkaline heavy operational layer material is magnesia or magnesium chromium matter or rhombspar matter or magnesium is calcareous or the magnesium zirconium is calcareous or magnesium zirconium matter, and its technical requirement is as follows:
(1) MgO% 〉=80% in the magnesia heavy working lining, all the other introduce impurity for raw material;
(2) MgO% is 55～80% in the magnesium chromium matter heavy working lining, Cr
2O
3% is 8～20%, and all the other introduce impurity for raw material;
(3) MgO% is 30～42% in the rhombspar matter heavy working lining, and CaO% is 40～60%, and all the other introduce impurity for raw material;
(4) MgO% is 80～87% in the calcareous heavy working lining of magnesium, and CaO% is 6～20%, and all the other introduce impurity for raw material;
(5) MgO% is 35～80% in the calcareous heavy working lining of magnesium zirconium, and CaO% is 5～60%, ZrO
2% is 1.5～15%, and all the other introduce impurity for raw material;
(6) magnesium zirconium matter heavy working lining MgO% 〉=90%, ZrO
2/ % is 1.4～5%, and all the other introduce impurity for raw material;
Two, light heat insulation layer is for being mixed into the light heat insulation layer of aglite with alumina hollow ball or magnalium hollow ball or corundum bollow ball or three, and its technical indicator and content ratio are as follows:
(1) in the alumina hollow ball high-strength light thermofin, Al
2O
3Quality percentage composition＞98.5%, particle diameter is 0.2～5mm, natural tap density 0.6～0.9g/cm
3The quality percentage composition of each component is: alumina hollow ball 35～65%; α-Al
2O
3Micro mist 35～65%; Adding wedding agent is α-Al
2O
330～35% of micro mist quality percentage composition; Corresponding density is 1.3～2.0g/cm
3
(2) in the magnalium hollow ball high-strength light thermofin, its technical indicator and content ratio are as follows:
Al
2O
3The quality percentage composition be 60～80%, the quality percentage composition 20～40% of MgO, particle diameter are 0.2～5mm, natural tap density 0.8～1.0g/cm
3The quality percentage composition of each component is in the magnalium bubble lightweight insulating layer: magnalium hollow ball 38～65%.α-Al
2O
3It is α-Al that micro mist 35～62% adds wedding agent
2O
331～33% of micro mist quality percentage composition; Corresponding density is 1.3～2.0g/cm
3
(3) in the corundum bollow ball high-strength light thermofin, its technical indicator and content ratio are as follows:
Al
2O
3Quality percentage composition＞92%, particle diameter is 0.2～5mm, natural tap density 0.6～0.9g/cm
3The quality percentage composition of each component is in the corundum bollow ball light heat insulation layer: corundum bollow ball 34～60%, α-Al
2O
3Micro mist 40～66%, to add wedding agent be α-Al
2O
330～35% of micro mist quality percentage composition; Corresponding density is 1.2～1.7g/cm
3
(4) in alumina hollow ball, magnalium hollow ball, the corundum bollow ball three composite high-strength light heat insulation layer, the quality percentage composition of each component is: alumina hollow ball 0～65%; Magnalium hollow ball 0～65%; Corundum bollow ball 0～65; α-Al
2O
3Micro mist 35～62%; Adding wedding agent is α-Al
2O
331～33% of micro mist.
The preparation method of B, heat-insulating integrated composite brick with alkaline structure:
(1) heavy working lining preparation: will be not more than 325 powder materials earlier and prepare the back in proportion and in ball mill, mix, and mix the powder that the back adding mixes at all the other particless of aggregates and wedding agent again, and stir standby after 10～30 minutes;
(2) light heat insulation layer preparation: alumina hollow ball or magnalium hollow ball or corundum bollow ball or three are mixed as being aglite, aglite is mixed with wedding agent in proportion, it is standby to add powder stirring 10～30 minutes then in proportion;
(3) moulding: finish after the batching, with dividing plate the material chamber of forming mould is divided into two portions, the length dimension ratio of fine and close working lining and high-strength light thermofin is 1～5: 2～1, and reinforced back is extracted dividing plate out, adopts vibrations pressurization or mechanical pressing;
(4) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1650～1800 ℃ of insulations in 3～8 hours.
In the described light heat insulation layer, wedding agent is an organic bond, or phosphoric acid solution or phosphate dihydrogen aluminum solution or aluminium glue or alum liquor.
In the described heavy working lining, wedding agent is an organic bond.
It is working lining that the present invention adopts the compact alkaline refractory materials, alumina hollow ball or magnalium hollow ball or corundum bollow ball or three's mixture are as the thermofin aggregate, introduce the space and improve heat-proof quality and also guarantee lightweight position intensity and refractoriness, and realize synchronously sintering together.The composite structure brick separates with dividing plate earlier when moulding is reinforced, adds heavy material and light material respectively, and reinforced back is extracted dividing plate out, adopts vibrations pressurization or mechanical pressing, and base substrate loading of kiln after 80～150 ℃ of oven dry was burnt till in 1650～1800 ℃ of insulations in 3～8 hours.
The beneficial effect that the present invention has is:
The present invention is not for to reduce under the material situation in work-ing life, and product has energy efficient, reduces the effect of materials consumption and minimizing rotary kiln refractory materials consumption, can effectively prolong service life of equipment.
Description of drawings
Accompanying drawing is the structure iron of heat-insulating integrated composite brick with alkaline structure.
Among the figure: 1, heavy working lining, 2, light heat insulation layer.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in drawings, comprise that the compact alkaline material is the heavy working lining of raw material, and the light heat insulation layer that is mixed into aglite with alumina hollow ball or magnalium hollow ball or corundum bollow ball or three, be composited by both, the length dimension ratio of heavy working lining and light heat insulation layer is 1～5: 2～1.The compact alkaline refractory masses bears high temperature, various physics and chemical action directly as heavy working lining 1; Alumina hollow ball or magnalium hollow ball or corundum bollow ball or three's mixture play the strength support effect as the aggregate of light heat insulation layer 2, and can effectively reduce the transmission of heat to drum surface, reduce the drum surface temperature, prolong equipment life.
Embodiment 1:
Present embodiment adopts fine and close magnesia heavy working lining and alumina bubble lightweight insulating layer to be composited, and the heavy working lining is a raw material with electrosmelted magnesite clinker or magnesite clinker, and lignosulfite is a wedding agent, requires MgO% 〉=80%.Raw material and quality percentage composition thereof that the lightweight working lining is adopted are: alumina hollow ball 65%, α-Al
2O
3Micro mist 35%, to add the phosphoric acid wedding agent be α-Al
2O
335% of micro mist quality percentage composition.
Preparation technology may further comprise the steps:
(1) batching: the proportioning process of heavy working lining mixes in ball mill after 325 powder materials prepare in proportion for being not more than earlier, mixes the powder that the back adding mixes at all the other particless of aggregates and wedding agent then, stirs standby after 10～30 minutes; The proportioning process of light heat insulation layer adds α-Al then in proportion for alumina hollow ball is mixed with the phosphoric acid wedding agent in proportion
2O
3Stir 10～30 minutes standby.
(2) moulding: finish after the batching, according to the use location and the wear rate of material and determine the heavy working lining work-ing life and the lightweight working lining between dimension scale, with dividing plate the material chamber of forming mould is divided into two portions according to ratio, reinforced back is extracted dividing plate out, adopts the vibrations extrusion forming.
(3) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1800 ℃ of insulations in 3 hours.
Embodiment 2:
Present embodiment adopts fine and close magnesium chromium matter heavy working lining and magnalium bubble lightweight insulating layer to be composited, and the raw material that the heavy working lining is adopted is magnesite clinker or electrosmelted magnesite clinker and fire-resistant level chrome ore, and wedding agent is an Adlerika, and requiring MgO% is 55～80%, Cr
2O
3% is 8～20%.Raw material that light heat insulation layer adopted and quality percentage composition thereof are: magnalium hollow ball 38%, α-Al
2O
3Micro mist 62%, to add the biphosphate Al binding agent be α-Al
2O
331% of micro mist quality percentage composition.
Preparation technology may further comprise the steps:
(1) batching: the proportioning process of heavy working lining mixes in ball mill after 325 powder materials prepare in proportion for being not more than earlier, mixes the powder that the back adding mixes at all the other particless of aggregates and wedding agent then, stirs standby after 10～30 minutes; The proportioning process of high-strength light thermofin adds α-Al then in proportion for the magnalium hollow ball is mixed with the biphosphate Al binding agent in proportion
2O
3Stir 10～30 minutes standby.
(2) moulding: finish after the batching, according to the use location and the wear rate of material and determine the heavy working lining work-ing life and the lightweight working lining between dimension scale, with dividing plate the material chamber of forming mould is divided into two portions according to ratio, reinforced back is extracted dividing plate out, adopts mechanical pressing.
(3) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1650 ℃ of insulations in 3～8 hours.
Embodiment 3:
Present embodiment adopts fine and close rhombspar matter heavy working lining and corundum bollow ball light heat insulation layer to be composited, the raw material konite sand that the heavy working lining is adopted, and whiteruss is a wedding agent, and requiring MgO% is 30～42%, and CaO% is 40～60%.Raw material and quality percentage composition thereof that the lightweight working lining is adopted are: corundum bollow ball 60%, α-Al
2O
3Micro mist 40%, additional sulfuric acid Al binding agent are α-Al
2O
335% of micro mist quality percentage composition.
Preparation technology may further comprise the steps:
(1) batching: the proportioning process of heavy working lining mixes in ball mill after 325 powder materials prepare in proportion for being not more than earlier, mixes the powder that the back adding mixes at all the other particless of aggregates and wedding agent then, stirs standby after 10～30 minutes; The proportioning process of high-strength light thermofin adds α-Al then in proportion for corundum bollow ball is mixed with the Tai-Ace S 150 wedding agent in proportion
2O
3Stir 10～30 minutes standby.
(2) moulding: finish after the batching, according to the use location and the wear rate of material and determine the heavy working lining work-ing life and the lightweight working lining between dimension scale, with dividing plate the material chamber of forming mould is divided into two portions according to ratio, reinforced back is extracted dividing plate out, adopts vibrations pressurization or mechanical pressing.
(3) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1650 ℃ of insulations in 3～8 hours.
Embodiment 4:
Present embodiment adopts the calcareous heavy working lining of fine and close magnesium, lightweight working lining aggregate is mixed by alumina hollow ball, magnalium hollow ball and corundum bollow ball, the raw material that the heavy working lining is adopted is a Mg-Ca synthesized sand, whiteruss is a wedding agent, requiring MgO% is 80～87%, and CaO% is 6～20%; Raw material and quality percentage composition thereof that the lightweight working lining is adopted are: alumina hollow ball 15%, magnalium hollow ball 25%, corundum bollow ball 20%, α-Al
2O
3Micro mist 40%, additional sulfuric acid Al binding agent are α-Al
2O
333% of micro mist quality percentage composition.
Preparation technology may further comprise the steps:
(1) batching: the proportioning process of heavy working lining mixes in ball mill after 325 powder materials prepare in proportion for being not more than earlier, mixes the powder that the back adding mixes at all the other particless of aggregates and wedding agent then, stirs standby after 10～30 minutes; The proportioning process of high-strength light thermofin adds α-Al then in proportion for alumina hollow ball corundum bollow ball, magnalium hollow ball are mixed with the Tai-Ace S 150 wedding agent in proportion
2O
3Stir 10～30 minutes standby.
(2) moulding: finish after the batching, according to the use location and the wear rate of material and determine the heavy working lining work-ing life and the lightweight working lining between dimension scale, with dividing plate the material chamber of forming mould is divided into two portions according to ratio, reinforced back is extracted dividing plate out, adopts vibrations pressurization or mechanical pressing.
(3) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1650 ℃ of insulations in 3～8 hours.
Embodiment 5:
Present embodiment adopts calcareous heavy working lining of fine and close magnesium zirconium and alumina bubble lightweight insulating layer to be composited, the raw material that the heavy working lining is adopted is that konite sand, zirconium white or calcium zirconate are raw material, and wedding agent is a whiteruss, and requiring MgO% is 35～80%, CaO% is 5～60%, ZrO
2% is 1.5～15%; Raw material and quality percentage composition thereof that the lightweight working lining is adopted are: alumina hollow ball 65%, α-Al
2O
3Micro mist 35%, to add the phosphoric acid wedding agent be α-Al
2O
335% of micro mist quality percentage composition.
Preparation technology may further comprise the steps:
(1) batching: the proportioning process of heavy working lining mixes in ball mill after 325 powder materials prepare in proportion for being not more than earlier, mixes the powder that the back adding mixes at all the other particless of aggregates and wedding agent then, stirs standby after 10～30 minutes; The proportioning process of light heat insulation layer adds α-Al then in proportion for alumina hollow ball is mixed with the phosphoric acid wedding agent in proportion
2O
3Stir 10～30 minutes standby.
(2) moulding: finish after the batching, according to the use location and the wear rate of material and determine the heavy working lining work-ing life and the lightweight working lining between dimension scale, with dividing plate the material chamber of forming mould is divided into two portions according to ratio, reinforced back is extracted dividing plate out, adopts the vibrations extrusion forming.
(3) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1800 ℃ of insulations in 3 hours.
Embodiment 6:
Present embodiment adopts fine and close magnesium zirconium matter heavy working lining and magnalium bubble lightweight insulating layer to be composited, and the raw material that the heavy working lining is adopted is electrosmelted magnesite clinker or magnesite clinker and zirconium white, and lignosulfite is a wedding agent, requires MgO% 〉=90%, ZrO
2/ % is 1.4～5%; Raw material that light heat insulation layer adopted and quality percentage composition thereof are: magnalium hollow ball 38%, α-Al
2O
3Micro mist 62%, to add the biphosphate Al binding agent be α-Al
2O
331% of micro mist quality percentage composition.
Preparation technology may further comprise the steps:
(1) batching: the proportioning process of heavy working lining mixes in ball mill after 325 powder materials prepare in proportion for being not more than earlier, mixes the powder that the back adding mixes at all the other particless of aggregates and wedding agent then, stirs standby after 10～30 minutes; The proportioning process of high-strength light thermofin adds α-Al then in proportion for the magnalium hollow ball is mixed with the biphosphate Al binding agent in proportion
2O
3Stir 10～30 minutes standby.
(2) moulding: finish after the batching, according to the use location and the wear rate of material and determine the heavy working lining work-ing life and the lightweight working lining between dimension scale, with dividing plate the material chamber of forming mould is divided into two portions according to ratio, reinforced back is extracted dividing plate out, adopts mechanical pressing.
(3) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1650 ℃ of insulations in 3～8 hours.
The heat-insulating integrated composite brick with alkaline structure heavy working lining that above example is prepared and technical indicator, proportioning and the performance index of lightweight working lining are as shown in Table 1 and Table 2.
Table 1 heat-insulating integrated composite brick with alkaline structure heavy layer material physical and chemical index
Table 2 magnalium structure/heat-insulating integrated composite brick light heat insulation layer proportioning and performance index
| Material | Density, g/cm 3 | The quality proportioning is formed | Thermal conductivity, W/m.K | Use temperature, ℃ |
| The alumina bubble lightweight layer | 1.3～2.0 | Alumina hollow ball 35～65%, α-Al 2O 3Micro mist 35～65%, to add wedding agent be α-Al 2O 330～35% of micro mist quality percentage composition | 0.6～1.3 | ≤ 1800 |
| Magnalium bubble lightweight layer | 1.4～1.8 | Magnalium hollow ball 38～65%.α-Al 2O 3Micro mist 35～62%, adding wedding agent is α-Al 2O 331～33% of micro mist | 0.8～1.2 | 1650～1800 |
| The corundum bollow ball light layer | 1.2～1.7 | Corundum bollow ball 34～60%, α-Al 2O 3Micro mist 40～66%, to add wedding agent be α-Al 2O 330～35% of micro mist quality percentage composition; | 0.6～1.0 | ≤ 1650 |
| Alumina hollow ball/magnalium hollow ball/corundum bollow ball mixolimnion | 1.4～1.8 | Alumina hollow ball 0～65%, magnalium hollow ball 0～65%, corundum bollow ball 0～65%, α-Al 2O 3Micro mist 35～62%, adding wedding agent is α-Al 2O 331～33% of micro mist | 0.8～1.2 | 1650～1800 |
The present invention carries out the composite brick design according to tonnage and the use location of rotary kiln, carrying out material component according to the production capacity of kiln temperature and rotary kiln selects, the compact alkaline working lining can directly contact material and flame, alumina hollow ball or magnalium hollow ball or corundum bollow ball or three mix as the thermal insulation layer aggregate, heat-proof quality be can improve and lightweight position intensity and refractoriness guaranteed, the heat-insulating integrated composite brick with alkaline structure of the present invention's preparation, resistance to wear, antistrip performance is good, thermal conductivity factor is low and structural strength is high, the building construction that is directly used in rotary kiln is convenient, reduce radiation loss, the decrease energy consumes.
Claims (4)
1. heat-insulating integrated composite brick with alkaline structure, it is characterized in that: comprise that the compact alkaline material is the heavy working lining of raw material, and the light heat insulation layer that is mixed into aglite with alumina hollow ball or magnalium hollow ball or corundum bollow ball or three, be composited by both, the length dimension ratio of heavy working lining and light heat insulation layer is 1～5: 2～1.
2. the preparation method of a kind of heat-insulating integrated composite brick with alkaline structure according to claim 1 is characterized in that:
The proportioning raw materials of A, heavy working lining and light heat insulation layer is as follows:
One, compact alkaline heavy operational layer material is magnesia or magnesium chromium matter or rhombspar matter or magnesium is calcareous or the magnesium zirconium is calcareous or magnesium zirconium matter, and its technical requirement is as follows:
(1) MgO% 〉=80% in the magnesia heavy working lining, all the other introduce impurity for raw material;
(2) MgO% is 55～80% in the magnesium chromium matter heavy working lining, Cr
2O
3% is 8～20%, and all the other introduce impurity for raw material;
(3) MgO% is 30～42% in the rhombspar matter heavy working lining, and CaO% is 40～60%, and all the other introduce impurity for raw material;
(4) MgO% is 80～87% in the calcareous heavy working lining of magnesium, and CaO% is 6～20%, and all the other introduce impurity for raw material;
(5) MgO% is 35～80% in the calcareous heavy working lining of magnesium zirconium, and CaO% is 5～60%, ZrO
2% is 1.5～15%, and all the other introduce impurity for raw material;
(6) magnesium zirconium matter heavy working lining MgO% 〉=90%, ZrO
2/ % is 1.4～5%, and all the other introduce impurity for raw material;
Two, light heat insulation layer is for being mixed into the light heat insulation layer of aglite with alumina hollow ball or magnalium hollow ball or corundum bollow ball or three, and its technical indicator and content ratio are as follows:
(1) in the alumina hollow ball high-strength light thermofin, Al
2O
3Quality percentage composition＞98.5%, particle diameter is 0.2～5mm, natural tap density 0.6～0.9g/cm
3The quality percentage composition of each component is: alumina hollow ball 35～65%; α-Al
2O
3Micro mist 35～65%; Adding wedding agent is α-Al
2O
330～35% of micro mist quality percentage composition; Corresponding density is 1.3～2.0g/cm
3
(2) in the magnalium hollow ball high-strength light thermofin, its technical indicator and content ratio are as follows:
Al
2O
3The quality percentage composition be 60～80%, the quality percentage composition 20～40% of MgO, particle diameter are 0.2～5mm, natural tap density 0.8～1.0g/cm
3The quality percentage composition of each component is in the magnalium bubble lightweight insulating layer: magnalium hollow ball 38～65%.α-Al
2O
3It is α-Al that micro mist 35～62% adds wedding agent
2O
331～33% of micro mist quality percentage composition; Corresponding density is 1.3～2.0g/cm
3
(3) in the corundum bollow ball high-strength light thermofin, its technical indicator and content ratio are as follows:
Al
2O
3Quality percentage composition＞92%, particle diameter is 0.2～5mm, natural tap density 0.6～0.9g/cm
3The quality percentage composition of each component is in the corundum bollow ball light heat insulation layer: corundum bollow ball 34～60%, α-Al
2O
3Micro mist 40～66%, to add wedding agent be α-Al
2O
330～35% of micro mist quality percentage composition; Corresponding density is 1.2～1.7g/cm
3
(4) in alumina hollow ball, magnalium hollow ball, the corundum bollow ball three composite high-strength light heat insulation layer, the quality percentage composition of each component is: alumina hollow ball 0～65%; Magnalium hollow ball 0～65%; Corundum bollow ball 0～65; α-Al
2O
3Micro mist 35～62%; Adding wedding agent is α-Al
2O
331～33% of micro mist.
The preparation method of B, heat-insulating integrated composite brick with alkaline structure:
(1) heavy working lining preparation: will be not more than 325 powder materials earlier and prepare the back in proportion and in ball mill, mix, and mix the powder that the back adding mixes at all the other particless of aggregates and wedding agent again, and stir standby after 10～30 minutes;
(2) light heat insulation layer preparation: alumina hollow ball or magnalium hollow ball or corundum bollow ball or three are mixed as being aglite, aglite is mixed with wedding agent in proportion, it is standby to add powder stirring 10～30 minutes then in proportion;
(3) moulding: finish after the batching, with dividing plate the material chamber of forming mould is divided into two portions, the length dimension ratio of fine and close working lining and high-strength light thermofin is 1～5: 2～1, and reinforced back is extracted dividing plate out, adopts vibrations pressurization or mechanical pressing;
(4) burn till: the loading of kiln after 80～150 ℃ of oven dry of the base substrate taking-up after the moulding was burnt till in 1650～1800 ℃ of insulations in 3～8 hours.
3. the preparation method of a kind of heat-insulating integrated composite brick with alkaline structure according to claim 1, it is characterized in that: in the described light heat insulation layer, wedding agent is an organic bond, or phosphoric acid solution or phosphate dihydrogen aluminum solution or aluminium glue or alum liquor.
4. the preparation method of a kind of heat-insulating integrated composite brick with alkaline structure according to claim 1, it is characterized in that: in the described heavy working lining, wedding agent is an organic bond.
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| CN 201010192192 CN101857451B (en) | 2010-06-07 | 2010-06-07 | Heat-insulating integrated composite brick with alkaline structure and preparation method thereof |
| PCT/CN2011/075386 WO2011153932A1 (en) | 2010-06-07 | 2011-06-07 | Structure and heat insulation integrated composite brick |
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|---|---|---|---|
| CN 201010192192 CN101857451B (en) | 2010-06-07 | 2010-06-07 | Heat-insulating integrated composite brick with alkaline structure and preparation method thereof |
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| CN101857451A true CN101857451A (en) | 2010-10-13 |
| CN101857451B CN101857451B (en) | 2013-04-03 |
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