CN102731118A - Corundum micro-pore heat-insulating and fireproof material and preparation method thereof - Google Patents
Corundum micro-pore heat-insulating and fireproof material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a corundum micro-pore heat-insulating and fireproof material and a preparation method thereof. The contents of raw materials of the corundum micro-pore heat-insulating and fireproof material are as follows: 40-50 wt% of corundum grain, 40-45 wt% of corundum fine powder, 5-10 wt% of active a-aluminum oxide micro-powder and 5-10 wt% r-aluminum oxide micro-powder, an additive, a dispersant account for 0.1-0.5 wt% of the above raw materials, nano aluminum oxide powder accounting for 0.1-1.5 wt% of the above materials and water accounting for 5-10 wt% of the above materials. The preparation method comprises the following steps of: dispersing the nano aluminum oxide powder into the water and dispersing under an ultrasonic vibration condition for 1-5 minutes to prepare a uniform suspension solution; then, gradually dropwise adding the suspension solution into a mixed material, and vibrating and molding; maintaining at a room temperature for 24-48 hours; de-molding and carrying out heat treatment at 1400-1600 DEG C; and keeping the heat for 1-5 hours. The corundum micro-pore heat-insulating and fireproof material and the preparation method thereof have the advantages of simple preparation process and lower energy consumption; a product has the advantages of small average hole diameter, high fireproof degree, great high-temperature resistance, low thermal conductivity and strong anti-corrosion resistance; and the product can be directly applied to a working layer of thermal equipment.
Description
Technical field
The invention belongs to the insulating refractory technical field.Relate in particular to a kind of corundum matter micropore insulating refractory and preparation method thereof.
Background technology
Along with country improves energy-saving and cost-reducing requirement day by day, the development of heat insulating refractory materials has obtained development rapidly.Normally through improving the thermal conductivity that void content reduces material, the void content of material is high more for traditional insulating refractory such as lightweight corundum brick, diatomite brick and lime feldspar light cinder brick etc., and its physical strength descends.In addition, traditional insulating refractory goods that normally formalize need mechanical pressing; Energy consumption is higher, needs manual work to build by laying bricks or stones in use, and labour intensity is big; It can only be used for the not too high and position that directly do not contact with high-temp liquid or other medium of use temperature because its receive easily working medium erosion and infiltration (Xu Pingkun, Dong Yingbang. corundum refractory. Beijing: metallurgical industry press; 1999); Influence its work-ing life, even have influence on the production safety of high temperature kiln or container, thereby limited its use.Therefore; The working lining material of the kiln of hot industries such as ferrous metallurgy or container is main with fine and close mould material still at present; Easy construction when it uses, labour intensity are low, and the hot strength of material is high, and slag corrosion resistance and penetrating power are strong; But fine and close mould material thermal shock resistance is relatively poor, thermal conductivity is higher, and in use the heat loss amount is bigger.
The researchist improves on the basis of dense form mould material; Invented like " a kind of non-cement light alumina magnesia cast material and preparation method thereof " patented technology (CN200710052468.5); It has adopted the ceramic foam particle; Guarantee workability and low temperature intensity through adding silicon powder; Avoided because of with the aluminous cement be wedding agent cause use temperature can not be too high, be prone to produce the unfavorable factor of structure spalling and slag resistance difference, can apply to the position that directly contacts with medium such as slag.Yet ceramic foam particulate void content that it adopts is high, mean pore size still big (< 30 μ m), and energy-conservation need are cost with slag corrosion resistance and the penetrating quality that weakens material.Simultaneously, too much silicon powder can make material at high temperature produce too much liquid phase in the magnalium system, has a strong impact on the use properties under its high temperature, has limited the use temperature of magnalium based material.
At present, China's hot industry normally is employed in the structure design that the working lining periphery adds thermofin with the inner lining material of kiln or container, and working lining is selected fine and close mould material usually for use, and thermofin is then selected insulating refractory for use.This structure design not only makes the liner thickening of kiln or container, thereby has dwindled the volume of kiln or container, and inner lining material is built by laying bricks or stones or when constructing, labour intensity is bigger.Therefore; Preparing structure heat-insulating integrated furnace lining material can effectively overcome the above problems, and like " a kind of corundum structural heat-insulation integrative composite brick and preparation method " (CN101857450A) patented technology, has introduced a kind of heavy supporting layer that comprises compact alumina; And be the light heat insulation layer of aglite with the alumina hollow ball; By the composite brick that two-layer employing vibration pressurization or mechanical pressing are composited, wherein, the length dimension ratio of heavy supporting layer and light heat insulation layer is 1 ~ 5:2 ~ 1.Though the composite brick that makes has higher refractoriness, higher intensity and thermal and insulating performance preferably, this composite brick needs mechanical pressing, and energy consumption is higher; And this composite brick is when building by laying bricks or stones; Hand labor intensity is big, has brickwork joint between each fragment of brick, and the volume stability of furnace lining is relatively poor.
Summary of the invention
The present invention is intended to overcome the prior art defective, and task provides the preparation method of the corundum matter micropore insulating refractory that a kind of manufacture craft is simple, energy consumption is lower.Insulating refractory mean pore size with the preparation of this method is little, refractoriness is high, hot strength is big, thermal conductivity is low, volume stability is good and corrosion resistance is strong, can directly be used for the working lining of Thermal Equipment, and easy construction and labour intensity are low in use.
For accomplishing above-mentioned task; The technical scheme that the present invention adopted is: the raw material and the content thereof of said corundum matter micropore insulating refractory are: the corundum in granules of 40 ~ 50wt%; The corundum fine powder of 40 ~ 45wt%, the active α – alumina powder of 5 ~ 10wt%, 5 ~ 10wt% De ρ – alumina powder; Admixture and content thereof are: the dispersion agent of above-mentioned raw materials 0.1 ~ 0.5wt%, above-mentioned raw materials 0.1 ~ 1.5wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%.
The preparation method of said corundum matter micropore insulating refractory is: prepare burden by the content of raw material and admixture earlier; Again with raw material and dispersant; Process compound; Be dispersed in the water nano alumina powder jointed in addition, under the ultra-sonic oscillation condition, disperseed 1 ~ 5 minute, be mixed with uniform suspension-s; Then suspension-s is dropwise joined in the said compound, stir, vibratory compaction; Maintenance at room temperature 24 ~ 48 hours; The demoulding through 110 ~ 200 ℃ of dryings 10 ~ 24 hours, is heat-treated the idiosome after the demoulding at last under 1400 ~ 1600 ℃ of conditions; Be incubated 1 ~ 5 hour, promptly get corundum matter micropore insulating refractory.
In technique scheme: corundum in granules is a kind of in plate diamond spar particle, white fused alumina particle, the brown corundum in granules; The Al of corundum in granules
2O
3Content is 95 ~ 99wt%, granularity<3mm; Corundum fine powder is one or both in plate diamond spar fine powder, white fused alumina fine powder, the brown corundum fine powder; The Al of corundum fine powder
2O
3Content is 95 ~ 99wt%, and the grain composition ratio of corundum fine powder is: granularity accounts for 40 ~ 50wt% less than the corundum fine powder of 0.045mm, and granularity is that the corundum fine powder of 0.045mm ~ 0.088mm accounts for 50 ~ 60wt%; The Al of active α – alumina powder
2O
3Han Liang>99wt%, granularity is less than 0.009mm; The Al of active ρ-alumina powder
2O
3Han Liang>99wt%, granularity is less than 0.003mm; Dispersion agent is one or both in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and the polyoxyethylene glycol; The Al of nano aluminium oxide
2O
3Content is>99wt%, granularity is less than 100nm.
Because adopt technique scheme, the present invention is incorporated in the corundum pouring material nano alumina powder jointed, preparation technology is simple, energy consumption is lower.It is main raw material that this mould material system is selected corundum for use, does not in use have low melt-phase and produces, and refractoriness is high.Utilize active ρ-alumina powder and water that hydration reaction takes place at normal temperatures, generate bayerite and boehmite colloidal sol, produce early strength, dehydration reaction at high temperature takes place and generates activated alumina in its hydrated product, produces a large amount of micropores simultaneously; On the other hand; The nano alumina powder jointed effect of introducing that can play the refinement pore, and form a large amount of submicron orders and nano level pore, the pore of this scope size can reduce the thermal conductivity of material; Make the thermosteresis in high temperature kiln or the container reduce greatly; Improved anti-erosion and the penetrating power of material to high-temperature liquid state or other medium simultaneously, the generation of micropore can also reduce material thermal stresses at high temperature to a certain extent, improves its thermal shock resistance.In addition, utilize the nano aluminium oxide of introducing to produce pottery and combine with the activated alumina micro mist reaction of activated alumina that reacts generation and adding, the matrix strength of reinforcement mould material, thus guaranteed material use properties at high temperature.
Therefore; Preparation technology of the present invention is simple, energy consumption is lower, and prepared corundum matter micropore insulating refractory has that mean pore size is little, refractoriness is high, hot strength is big, thermal conductivity is low, volume stability is good and advantage such as corrosion resistance is strong, can directly be used for the working lining of Thermal Equipment; Easy construction in use, labour intensity are low; Have heat insulating and fireproof effect, heat insulation effect is better, helps saving energy and reduce the cost.
Embodiment
Below in conjunction with embodiment the present invention being done further description, is not the restriction to its protection domain.
For avoiding repetition, earlier that this embodiment is related raw material and admixture are agreed to be described below, and repeat no more among the embodiment:
The Al of plate diamond spar particle, white fused alumina particle and brown corundum in granules
2O
3Content is 95 ~ 99wt%, granularity<3mm; The Al of plate diamond spar fine powder, white fused alumina fine powder and brown corundum fine powder
2O
3Content is 95 ~ 99wt%, the Al of active α – alumina powder
2O
3Han Liang>99wt%, granularity is less than 0.009mm; The Al of active ρ – alumina powder
2O
3Han Liang>99wt%, granularity is less than 0.003mm; The Al of nano aluminium oxide
2O
3Content is>99wt%, granularity is less than 100nm.
Embodiment 1
A kind of corundum matter micropore insulating refractory and preparation method thereof.The raw material and the content thereof of said corundum matter micropore insulating refractory are: the corundum in granules of 40 ~ 45wt%, the corundum fine powder of 40 ~ 45wt%, the active α – alumina powder of 8 ~ 10wt%, ρ-alumina powder of 7 ~ 10wt%; Admixture and content thereof are: the tripoly phosphate sodium STPP of above-mentioned raw materials 0.1 ~ 0.5wt%, above-mentioned raw materials 0.1 ~ 0.5wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%.
The preparation method of present embodiment is: prepare burden by the content of raw material and admixture earlier; With raw material and dispersant, process compound again, be dispersed in the water nano alumina powder jointed in addition; Under the ultra-sonic oscillation condition, disperseed 1 ~ 5 minute, and be mixed with uniform suspension-s; Then suspension-s is dropwise joined in the said compound, stir, vibratory compaction; Maintenance at room temperature 24 ~ 48 hours; The demoulding through 110 ~ 200 ℃ of dryings 10 ~ 24 hours, is heat-treated the idiosome after the demoulding at last under 1400 ~ 1500 ℃ of conditions; Be incubated 1 ~ 3 hour, promptly get corundum matter micropore insulating refractory.
In the present embodiment: corundum in granules is the plate diamond spar particle; The grain composition ratio of corundum fine powder is: granularity accounts for 45 ~ 50wt% less than the plate diamond spar fine powder of 0.045mm, and granularity is that the plate diamond spar fine powder of 0.045mm ~ 0.088mm accounts for 50 ~ 55wt%.
The corundum matter micropore insulating refractory that present embodiment is prepared, its performance test results shows: void content is 25 ~ 30%; Volume density is 2.85 ~ 2.90g/cm
3Cold crushing strength is 80 ~ 90MPa; Strength at normal temperature is 15 ~ 20MPa; Mean pore size is 500 ~ 900nm; 300 ℃ thermal conductivity is 0.380 ~ 0.385 (W/ (mk)), and 600 ℃ thermal conductivity is 0.575 ~ 0.580 (W/ (mk)), and 1000 ℃ thermal conductivity is 0.725 ~ 0.730 (W/ (mk)).
Embodiment 2
A kind of corundum matter micropore insulating refractory and preparation method thereof.The raw material and the content thereof of said corundum matter micropore insulating refractory are: the corundum in granules of 45 ~ 50wt%, the corundum fine powder of 40 ~ 45wt%, the active α – alumina powder of 5 ~ 8wt%, ρ-alumina powder of 5 ~ 7wt%; Admixture and content thereof are: the Sodium hexametaphosphate 99 of above-mentioned raw materials 0.1 ~ 0.5wt%, above-mentioned raw materials 0.5 ~ 1.0wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%.
The preparation method of present embodiment is: prepare burden by the content of raw material and admixture earlier; With raw material and dispersant, process compound again, be dispersed in the water nano alumina powder jointed in addition; Under the ultra-sonic oscillation condition, disperseed 1 ~ 5 minute, and be mixed with uniform suspension-s; Then suspension-s is dropwise joined in the said compound, stir, vibratory compaction; Maintenance at room temperature 24 ~ 48 hours; The demoulding through 110 ~ 200 ℃ of dryings 10 ~ 24 hours, is heat-treated the idiosome after the demoulding at last under 1500 ~ 1600 ℃ of conditions; Be incubated 3 ~ 5 hours, promptly get corundum matter micropore insulating refractory.
In the present embodiment: corundum in granules is the plate diamond spar particle; The grain composition ratio of corundum fine powder is: granularity accounts for 40 ~ 45wt% less than the brown corundum fine powder of 0.045mm, and granularity is that the brown corundum fine powder of 0.045mm ~ 0.088mm accounts for 55 ~ 60wt%.
The corundum matter micropore insulating refractory that present embodiment is prepared, its performance test results shows: void content is 25 ~ 28%; Volume density is 2.87 ~ 2.90g/cm
3Cold crushing strength is 60 ~ 75MPa; Strength at normal temperature is 20 ~ 25MPa; Mean pore size is 400 ~ 700nm; 300 ℃ thermal conductivity is 0.285 ~ 0.290 (W/ (mk)), and 600 ℃ thermal conductivity is 0.440 ~ 0.445 (W/ (mk)), and 1000 ℃ thermal conductivity is 0.800 ~ 0.805 (W/ (mk)).
Embodiment 3
A kind of corundum matter micropore insulating refractory and preparation method thereof.The raw material and the content thereof of said corundum matter micropore insulating refractory are: the corundum in granules of 40 ~ 45wt%, the corundum fine powder of 40 ~ 45wt%, the active α – alumina powder of 8 ~ 10wt%, ρ-alumina powder of 5 ~ 7wt%; Admixture and content thereof are: the polyoxyethylene glycol of above-mentioned raw materials 0.1 ~ 0.5wt%, above-mentioned raw materials 1.0 ~ 1.5wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%.
The preparation method of present embodiment is: prepare burden by the content of raw material and admixture earlier; With raw material and dispersant, process compound again, be dispersed in the water nano alumina powder jointed in addition; Under the ultra-sonic oscillation condition, disperseed 1 ~ 5 minute, and be mixed with uniform suspension-s; Then suspension-s is dropwise joined in the said compound, stir, vibratory compaction; Maintenance at room temperature 24 ~ 48 hours; The demoulding through 110 ~ 200 ℃ of dryings 10 ~ 24 hours, is heat-treated the idiosome after the demoulding at last under 1400 ~ 1500 ℃ of conditions; Be incubated 3 ~ 5 hours, promptly get corundum matter micropore insulating refractory.
In the present embodiment: corundum in granules is brown corundum in granules; The grain composition ratio of corundum fine powder is: granularity accounts for 45 ~ 50wt% less than the white fused alumina fine powder of 0.045mm, and granularity is that the white fused alumina fine powder of 0.045mm ~ 0.088mm accounts for 50 ~ 55wt%.
The corundum matter micropore insulating refractory that present embodiment is prepared, its performance test results shows: void content is 20 ~ 28%; Volume density is 2.85 ~ 2.90g/cm
3Cold crushing strength is 85 ~ 90MPa; Strength at normal temperature is 20 ~ 25MPa; Mean pore size is 300 ~ 600nm; 300 ℃ thermal conductivity is 0.200 ~ 0.205 (W/ (mk)), and 600 ℃ thermal conductivity is 0.600 ~ 0.605 (W/ (mk)), and 1000 ℃ thermal conductivity is 0.775 ~ 0.780 (W/ (mk)).
Embodiment 4
A kind of corundum matter micropore insulating refractory and preparation method thereof.The raw material and the content thereof of said corundum matter micropore insulating refractory are: the corundum in granules of 40 ~ 45wt%, the corundum fine powder of 40 ~ 45wt%, the active α – alumina powder of 5 ~ 8wt%, ρ-alumina powder of 7 ~ 10wt%; Admixture and content thereof are: the tripoly phosphate sodium STPP of above-mentioned raw materials 0.05 ~ 0.3wt% and the Sodium hexametaphosphate 99 of 0.05 ~ 0.2wt%, above-mentioned raw materials 0.5 ~ 1.0wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%.
The preparation method of present embodiment is with embodiment 1.
In the present embodiment: corundum in granules is brown corundum in granules; The grain composition ratio of corundum fine powder is: granularity accounts for 40 ~ 45wt% less than the plate diamond spar fine powder of 0.045mm, and granularity is that the white fused alumina fine powder of 0.045mm ~ 0.088mm accounts for 55 ~ 60wt%.
The corundum matter micropore insulating refractory that present embodiment is prepared, its performance test results shows: void content is 20 ~ 25%; Volume density is 2.90 ~ 2.95g/cm
3Cold crushing strength is 90 ~ 100MPa; Strength at normal temperature is 25 ~ 30MPa; Mean pore size is 400 ~ 600nm; 300 ℃ thermal conductivity is 0.230 ~ 0.235 (W/ (mk)), and 600 ℃ thermal conductivity is 0.635 ~ 0.640 (W/ (mk)), and 1000 ℃ thermal conductivity is 0.835 ~ 0.840 (W/ (mk)).
Embodiment 5
A kind of corundum matter micropore insulating refractory and preparation method thereof.The raw material and the content thereof of said corundum matter micropore insulating refractory are: the corundum in granules of 45 ~ 50wt%, the corundum fine powder of 40 ~ 45wt%, the active α – alumina powder of 5 ~ 8wt%, ρ-alumina powder of 5 ~ 7wt%; Admixture and content thereof are: the tripoly phosphate sodium STPP of above-mentioned raw materials 0.05 ~ 0.3wt% and the polyoxyethylene glycol of 0.05 ~ 0.2wt%, above-mentioned raw materials 0.1 ~ 0.5wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%.
The preparation method of present embodiment is: prepare burden by the content of raw material and admixture earlier; With raw material and dispersant, process compound again, be dispersed in the water nano alumina powder jointed in addition; Under the ultra-sonic oscillation condition, disperseed 1 ~ 5 minute, and be mixed with uniform suspension-s; Then suspension-s is dropwise joined in the said compound, stir, vibratory compaction; Maintenance at room temperature 24 ~ 48 hours; The demoulding through 110 ~ 200 ℃ of dryings 10 ~ 24 hours, is heat-treated the idiosome after the demoulding at last under 1500 ~ 1600 ℃ of conditions; Be incubated 1 ~ 3 hour, promptly get corundum matter micropore insulating refractory.
In the present embodiment: corundum in granules is the white fused alumina particle; The grain composition ratio of corundum fine powder is: granularity accounts for 45 ~ 50wt% less than the plate diamond spar fine powder of 0.045mm, and granularity is that the brown corundum fine powder of 0.045mm ~ 0.088mm accounts for 50 ~ 55wt%.
The corundum matter micropore insulating refractory that present embodiment is prepared, its performance test results shows: void content is 25 ~ 30%; Volume density is 2.75 ~ 2.80g/cm
3Cold crushing strength is 50 ~ 80MPa; Strength at normal temperature is 12 ~ 20MPa; Mean pore size is 600 ~ 1000nm; 300 ℃ thermal conductivity is 0.625 ~ 0.630 (W/ (mk)), and 600 ℃ thermal conductivity is 0.735 ~ 0.740 (W/ (mk)), and 1000 ℃ thermal conductivity is 1.000 ~ 1.050 (W/ (mk)).
Embodiment 6
A kind of corundum matter micropore insulating refractory and preparation method thereof.The raw material and the content thereof of said corundum matter micropore insulating refractory are: the corundum in granules of 40 ~ 45wt%, the corundum fine powder of 40 ~ 45wt%, the active α – alumina powder of 8 ~ 10wt%, ρ-alumina powder of 7 ~ 10wt%; Admixture and content thereof are: the Sodium hexametaphosphate 99 of above-mentioned raw materials 0.05 ~ 0.3wt% and the polyoxyethylene glycol of 0.05 ~ 0.2wt%, above-mentioned raw materials 1.0 ~ 1.5wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%.
The preparation method of present embodiment is with embodiment 2.
In the present embodiment: corundum in granules is the white fused alumina particle; The grain composition ratio of corundum fine powder is: granularity accounts for 40 ~ 45wt% less than the white fused alumina fine powder of 0.045mm, and granularity is that the brown corundum fine powder of 0.045mm ~ 0.088mm accounts for 55 ~ 60wt%.
The corundum matter micropore insulating refractory that present embodiment is prepared, its performance test results shows: void content is 28 ~ 30%; Volume density is 2.73 ~ 2.82g/cm
3Cold crushing strength is 65 ~ 90MPa; Strength at normal temperature is 15 ~ 25MPa; Mean pore size is 500 ~ 800nm; 300 ℃ thermal conductivity is 0.362 ~ 0.368 (W/ (mk)), and 600 ℃ thermal conductivity is 0.523 ~ 0.545 (W/ (mk)), and 1000 ℃ thermal conductivity is 0.675 ~ 0.690 (W/ (mk)).
This embodiment is incorporated in the corundum pouring material nano alumina powder jointed, and preparation technology is simple, energy consumption is lower.It is main raw material that this mould material system is selected corundum for use, does not in use have low melt-phase and produces, and refractoriness is high.Utilize active ρ-alumina powder and water that hydration reaction takes place at normal temperatures, generate bayerite and boehmite colloidal sol, produce early strength, dehydration reaction at high temperature takes place and generates activated alumina in its hydrated product, produces a large amount of micropores simultaneously; On the other hand; The nano alumina powder jointed effect of introducing that can play the refinement pore, and form a large amount of submicron orders and nano level pore, the pore of this scope size can reduce the thermal conductivity of material; Make the thermosteresis in high temperature kiln or the container reduce greatly; Improved anti-erosion and the penetrating power of material to high-temperature liquid state or other medium simultaneously, the generation of micropore can also reduce material thermal stresses at high temperature to a certain extent, improves its thermal shock resistance.In addition, utilize the nano aluminium oxide of introducing to produce pottery and combine with the activated alumina micro mist reaction of activated alumina that reacts generation and adding, the matrix strength of reinforcement mould material, thus guaranteed material use properties at high temperature.
The corundum matter micropore insulating refractory that this embodiment is prepared, its performance test results shows: void content is 20 ~ 30%; Volume density is 2.73 ~ 2.95g/cm
3Cold crushing strength is 50 ~ 100MPa; Strength at normal temperature is 12 ~ 30MPa; Mean pore size is 300 ~ 1000nm; 300 ℃ thermal conductivity is 0.200 ~ 0.630 (W/ (mk)), and 600 ℃ thermal conductivity is 0.440 ~ 0.740 (W/ (mk)), and 1000 ℃ thermal conductivity is 0.675 ~ 1.050 (W/ (mk)).
Therefore; This embodiment preparation technology is simple, energy consumption is lower, and prepared corundum matter micropore insulating refractory has that mean pore size is little, refractoriness is high, hot strength is big, thermal conductivity is low, volume stability is good and advantage such as corrosion resistance is strong, can directly be used for the working lining of Thermal Equipment; Easy construction in use, labour intensity are low; Have heat insulating and fireproof effect, heat insulation effect is better, helps saving energy and reduce the cost.
Claims (8)
1. the preparation method of a corundum matter micropore insulating refractory; The raw material and the content thereof that it is characterized in that said corundum matter micropore insulating refractory are: the corundum in granules of 40 ~ 50wt%; The corundum fine powder of 40 ~ 45wt%; The active α – alumina powder of 5 ~ 10wt%, ρ-alumina powder of 5 ~ 10wt%; Admixture and content thereof are: the dispersion agent of above-mentioned raw materials 0.1 ~ 0.5wt%, and above-mentioned raw materials 0.1 ~ 1.5wt%'s is nano alumina powder jointed, the water of above-mentioned raw materials 5 ~ 10wt%;
The preparation method of said corundum matter micropore insulating refractory is: prepare burden by the content of raw material and admixture earlier; Again with raw material and dispersant; Process compound; Be dispersed in the water nano alumina powder jointed in addition, under the ultra-sonic oscillation condition, disperseed 1 ~ 5 minute, be mixed with uniform suspension-s; Then suspension-s is dropwise joined in the said compound, stir, vibratory compaction; Maintenance at room temperature 24 ~ 48 hours; The demoulding through 110 ~ 200 ℃ of dryings 10 ~ 24 hours, is heat-treated the idiosome after the demoulding at last under 1400 ~ 1600 ℃ of conditions; Be incubated 1 ~ 5 hour, promptly get corundum matter micropore insulating refractory.
2. the preparation method of corundum matter micropore insulating refractory according to claim 1 is characterized in that said corundum in granules is a kind of in plate diamond spar particle, white fused alumina particle, the brown corundum in granules; The Al of corundum in granules
2O
3Content is 95 ~ 99wt%, granularity<3mm.
3. the preparation method of corundum matter micropore insulating refractory according to claim 1 is characterized in that said corundum fine powder is one or both in plate diamond spar fine powder, white fused alumina fine powder, the brown corundum fine powder; The Al of corundum fine powder
2O
3Content is 95 ~ 99wt%, and the grain composition ratio of corundum fine powder is: granularity accounts for 40 ~ 50wt% less than the corundum fine powder of 0.045mm, and granularity is that the corundum fine powder of 0.045mm ~ 0.088mm accounts for 50 ~ 60wt%.
4. the preparation method of corundum matter micropore insulating refractory according to claim 1 is characterized in that the Al of said active alpha-alumina powder
2O
3Han Liang>99wt%, granularity is less than 0.009mm.
5. the preparation method of corundum matter micropore insulating refractory according to claim 1 is characterized in that the Al of said active ρ-alumina powder
2O
3Han Liang>99wt%, granularity is less than 0.003mm.
6. the preparation method of corundum matter micropore insulating refractory according to claim 1 is characterized in that said dispersion agent is one or both in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and the polyoxyethylene glycol.
7. the preparation method of corundum matter micropore insulating refractory according to claim 1 is characterized in that the Al of said nano aluminium oxide
2O
3Content is>99wt%, granularity is less than 100nm.
8. according to the prepared corundum matter micropore insulating refractory of preparation method of each described corundum matter micropore insulating refractory in the claim 1 ~ 7.
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| CN105399432A (en) * | 2015-11-23 | 2016-03-16 | 宜兴瑞泰耐火材料有限公司 | High-strength, high-purity and low-silicon corundum brick for petrochemical industry, and preparation method for corundum brick |
| CN106588024A (en) * | 2017-01-05 | 2017-04-26 | 北京科技大学 | Preparation method for Al<7>O<3>N<5> combined corundum composite refractory material |
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| CN110054498A (en) * | 2019-02-22 | 2019-07-26 | 辽宁中弘信冶金技术有限公司 | Stove blockwork and preparation method thereof |
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| CN112408947A (en) * | 2020-10-30 | 2021-02-26 | 云南濮耐昆钢高温材料有限公司 | High-temperature-resistant coating for steel ladle and preparation method thereof |
| WO2022144013A1 (en) * | 2020-12-31 | 2022-07-07 | 郑州轻工业大学 | Corundum-based micro-nano-porous heat insulating refractory material and preparation method therefor |
| CN115231908A (en) * | 2022-07-05 | 2022-10-25 | 洛阳欧斯特建材有限公司 | High-purity alumina brick for preparing lithium battery anode material kiln and preparation method thereof |
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| CN111957945B (en) * | 2019-05-20 | 2022-01-14 | 宝山钢铁股份有限公司 | Long nozzle sealing gasket |
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| CN104311086A (en) * | 2014-10-28 | 2015-01-28 | 宁夏天纵泓光余热发电技术有限公司 | Light magnesium slag refractory castable |
| CN105399432A (en) * | 2015-11-23 | 2016-03-16 | 宜兴瑞泰耐火材料有限公司 | High-strength, high-purity and low-silicon corundum brick for petrochemical industry, and preparation method for corundum brick |
| CN106588024A (en) * | 2017-01-05 | 2017-04-26 | 北京科技大学 | Preparation method for Al<7>O<3>N<5> combined corundum composite refractory material |
| CN108285339A (en) * | 2018-02-12 | 2018-07-17 | 郑州市裕丰耐火材料有限公司 | A kind of foam-formed technique of light-weight refractory prefabricated component |
| CN110872192A (en) * | 2018-09-03 | 2020-03-10 | 上海梅山钢铁股份有限公司 | Nanometer coating for permanent layer of torpedo ladle and preparation method thereof |
| CN110054498A (en) * | 2019-02-22 | 2019-07-26 | 辽宁中弘信冶金技术有限公司 | Stove blockwork and preparation method thereof |
| CN110054498B (en) * | 2019-02-22 | 2022-01-28 | 辽宁中弘信冶金技术有限公司 | Prefabricated building block for furnace and kiln and preparation method thereof |
| CN112408947A (en) * | 2020-10-30 | 2021-02-26 | 云南濮耐昆钢高温材料有限公司 | High-temperature-resistant coating for steel ladle and preparation method thereof |
| WO2022144013A1 (en) * | 2020-12-31 | 2022-07-07 | 郑州轻工业大学 | Corundum-based micro-nano-porous heat insulating refractory material and preparation method therefor |
| CN115231908A (en) * | 2022-07-05 | 2022-10-25 | 洛阳欧斯特建材有限公司 | High-purity alumina brick for preparing lithium battery anode material kiln and preparation method thereof |
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