CN110407593A - A kind of low-density alumina-magnesia castable and preparation method thereof - Google Patents
A kind of low-density alumina-magnesia castable and preparation method thereof Download PDFInfo
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- CN110407593A CN110407593A CN201910769681.0A CN201910769681A CN110407593A CN 110407593 A CN110407593 A CN 110407593A CN 201910769681 A CN201910769681 A CN 201910769681A CN 110407593 A CN110407593 A CN 110407593A
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- low
- partial size
- magnesia castable
- density alumina
- water
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
Abstract
The invention discloses a kind of low-density alumina-magnesia castables, using the porous aluminum magnesium alloy particles of 60~85wt% as aggregate, using the niobium phosphate of the corundum fine powder of 10~35wt%, the carbonization aluminium powder of 0.05~0.3wt%, the metal aluminum fiber establishment ball of 1~6wt% and 2~8wt% as substrate material；Additional water-reducing agent and water mix.Using porous aluminum magnesium alloy particles as aggregate, corundum fine powder is matrix, and carbonization aluminium powder is bonding agent, metal aluminum fiber works out ball and niobium phosphate plays reinforced phase and increasing tougheness.The alumina-magnesia castable silicone content of the method for the present invention preparation is zero, the porosity is higher, bulk density is lower, without cement, average pore size is small, has the erosion medium resistances abilities such as better anti-steel slag.
Description
Technical field
The invention belongs to field of material technology, and in particular to a kind of low-density alumina-magnesia castable and preparation method thereof.
Background technique
With economic increasingly developed and social progress, energy-saving and emission-reduction become focus concerned by people.Light thermal-insulation
The development of material is rapidly developed.In terms of lightweight amorphous refractory, vermiculite, perlite, haydite and fiber are had developed
Castable etc., in contrast their thermal conductivity is low, can be used as thermal insulation material use, but its high-temperature behavior is poor, and anti-slag is invaded
Erosion is especially poor to alkaline scouring, cannot be directly used to the media such as industrial furnace working lining etc. and slag under the hot environments such as metallurgy
The position directly contacted.
CN201811068700.9 discloses a kind of ladle heat insulation aluminum-magnesium light castable, by controlling castable major ingredient
The weight percent of each component, formation continuous particulate is tightly packed, realizes the densification of castable, has castable higher
Normal temperature strength, hot elevated temperature strength and lower thermal conductivity, can be suitably used for steel mill's relatively rugged environment.But body is close
Greatly, the problem excessively fine and close, heat insulating ability is inadequate.
CN201010595986.3 discloses a kind of aluminum-magnesium light castable and preparation method thereof, has that silicone content is low, nothing
Cement, the porosity are high, average pore size is small, refractoriness is high, elevated temperature strength is big, thermal conductivity is low, good thermal shock stability and anti-steel slag etc.
The strong feature of erosion medium resistance ability is that the Energy Saving for Industrial Furnace such as pyrometallurgy work lining material, can be direct with the media such as high-temperature steel slag
Long Term Contact.But contain SiO2。
CN200710052468.5 discloses a kind of non-cement light alumina magnesia cast material and preparation method thereof, both can be with
It contacts with magnesia refractories, can directly be contacted with spinel refractory again at high temperature, there is porosity height, average hole
The feature that diameter is small, intensity is high, good thermal shock stability and anti-medium erosiveness are high.But it is bigger containing silicon, density.
Summary of the invention
It is an object of that present invention to provide a kind of lightweight low-density heat insulating refractory material, silicone content is lower, the porosity is higher,
Bulk density is lower, without cement, average pore size is small, has the erosion medium resistances abilities such as better anti-steel slag.
In order to achieve the above objectives, as follows using technical solution:
A kind of low-density alumina-magnesia castable, using the porous aluminum magnesium alloy particles of 60~85wt% as aggregate, with 10~
The corundum fine powder of 35wt%, the carbonization aluminium powder of 0.05~0.3wt%, 1~6wt% metal aluminum fiber establishment ball and 2~8wt%
Niobium phosphate be substrate material；Additional water-reducing agent and water mix.
According to the above scheme, the water-reducing agent is the mixture of sodium tripolyphosphate, calgon and poly carboxylic acid series water reducer；
Additional amount is 1~3wt% of aggregate and substrate material gross mass.
According to the above scheme, the additional amount of the water is 8~20wt% of aggregate and substrate material gross mass.
According to the above scheme, the apparent porosity of the porous aluminum magnesium alloy particles is 30~60%, average pore size < 20 μm,
Grain diameter is 0.1~8mm.Porous aluminum magnesium alloy particles are porous ultralow magnalium magnesium alloy, porous low magnalium magnesium alloy, porous
One of middle magnalium magnesium alloy, porous high magnalium magnesium alloy and porous superelevation magnalium magnesium alloy or more than one.
According to the above scheme, the corundum fine powder or the mixing for plate diamond spar fine powder, white fused alumina fine powder or both；Particle
Gradation: 70~90wt% of corundum fine powder that 150 μm~88 μm of partial size, corundum fine powder 10~30wt% of the partial size less than 88 μm.
According to the above scheme, the carbonization aluminium powder Al4C3Content > 96wt%；Grain composition: the aluminium carbide that 88~7 μm of partial size
5~15wt% of powder, 7~1 μm of partial size of carbonization 30~45wt% of aluminium powder, carbonization aluminium powder 50~60wt% of the partial size less than 1 μm.
According to the above scheme, Al content > 98wt% of metal aluminum fiber establishment ball；Grain composition: 88~32 μ of partial size
The metal aluminum fiber of m works out 10~15wt% of ball, and partial size is 32~4 μm of metal aluminum fiber establishment 25~35wt% of ball, partial size
Metal aluminum fiber establishment ball less than 4 μm is 50~60wt%.
According to the above scheme, purity > 99wt% of the niobium phosphate；Grain composition: 88~9 μm of partial size for 15~
20wt%, 9~3 μm of partial size are 25~30wt%, and partial size is 50~60wt% less than 3 μm.
The preparation method of above-mentioned low-density alumina-magnesia castable, comprising the following steps:
Water-reducing agent and substrate material are premixed, then the substrate material after premix is added in aggregate, then adds water and stirs uniformly, pours
Vibration moulding is infused, green body after molding is 6~36 hours dry under the conditions of 110~150 DEG C.
The present invention has the beneficial effect that referring now to the prior art:
Using porous aluminum magnesium alloy particles as aggregate, corundum fine powder is matrix, and carbonization aluminium powder is bonding agent, metal aluminum fiber volume
Ball and niobium phosphate processed play reinforced phase and increasing tougheness.
The method of the present invention preparation alumina-magnesia castable silicone content be zero, the porosity is higher, bulk density is lower, without cement,
Average pore size is small, has the erosion medium resistances abilities such as better anti-steel slag.
Specific embodiment
Following embodiment further illustrates technical solution of the present invention, but not as limiting the scope of the invention.
Embodiment 1
A kind of low-density alumina-magnesia castable and preparation method thereof.Using the porous aluminum magnesium alloy particles of 65wt% as aggregate, with
The corundum fine powder of 25wt%, the carbonization aluminium powder of 0.05wt%, 5wt% metal aluminum fiber establishment ball and 4.95wt% niobium phosphate
For substrate material；The water-reducing agent and substrate material of the 2.8wt% of the sum of additional aggregate and substrate material premixes, then by the substrate material after premix
It is added in aggregate, then the water of the 10wt% of the sum of additional aggregate and substrate material stirs evenly again, vibration moulding is poured, after molding
Green body dry 12 hours under the conditions of 110 DEG C.
In the present embodiment: porous aluminum magnesium alloy particles are porous ultralow magnalium magnesium alloy；Corundum fine powder is that plate diamond spar is thin
The mixture of powder and white fused alumina fine powder；Water-reducing agent is the mixture of sodium tripolyphosphate, calgon and poly carboxylic acid series water reducer.
Castable performance test results obtained by the present embodiment are shown in Table 1.
Table 1
Embodiment 2
A kind of low-density alumina-magnesia castable and preparation method thereof.Using the porous aluminum magnesium alloy particles of 64.85wt% as aggregate,
The niobium phosphate of ball and 4wt% is worked out with the metal aluminum fiber of the corundum fine powder of 28wt%, the carbonization aluminium powder of 0.15wt%, 3wt%
For substrate material；The water-reducing agent and substrate material of the 2wt% of the sum of additional aggregate and substrate material premixes, then the substrate material after premix is added
Enter in aggregate, then the water of the 13wt% of the sum of additional aggregate and substrate material stirs evenly again, is poured vibration moulding, after molding
Green body is 20 hours dry under the conditions of 130 DEG C.
In the present embodiment: porous aluminum magnesium alloy particles are porous ultralow magnalium magnesium alloy and porous middle magnalium magnesium alloy；Just
Beautiful fine powder is the mixture of plate diamond spar fine powder and white fused alumina fine powder；Water-reducing agent is the mixing of sodium tripolyphosphate and calgon
Object.Castable performance test results obtained by the present embodiment are shown in Table 2.
Table 2
The present invention mainly works out the combination system of ball and niobium phosphate using no silicon without the metal aluminum fiber of cement, with aluminium carbide
Powder is the same, and niobium phosphate and metal aluminum fiber establishment ball can react to form chain or netted conjugate with water at normal temperature, makes to pour
Material feeding has cryogenic property in preferable, enhances high-temperature behavior, while porous aluminum magnesium alloy particles being cooperated to generally form material
Non-densifying more micropore energy-saving Enhanced Configurations.It avoids the use temperature of more silica limitation magnalium based material and makes
At molten steel " oxygenation ", prevents the oversintering of material and densify and reduce applied at elevated temperature performance and energy-saving effect.
Low-density alumina-magnesia castable apparent porosity prepared by the present invention is 30~50%.It is low with silicone content, without cement,
The strong features of erosion medium resistances ability such as refractoriness is high, elevated temperature strength is big, thermal conductivity is low, good thermal shock stability and anti-steel slag, and by
Also it is that optimization porous structure, aperture are small in substrate material, not only makes material thermal conductivity lower, but also utilization can be induced in use
Dominant component forms highdensity calcium hexaluminate on the surface of the material in high-temperature steel slag and tiny spinelle is bis- " protective layer ", has certainly
Repair long-lived functionalization.
Find out that product prepared by the present invention is small, resistance to no silicon, porosity height, average pore size as Tables 1 and 2 as a result,
The strong features of erosion medium resistances ability such as fiery degree is high, elevated temperature strength is big, thermal conductivity is low, good thermal shock stability and anti-steel slag, are high temperature
The Energy Saving for Industrial Furnace such as metallurgy work lining material, can be with the direct Long Term Contact of media such as high-temperature steel slag.
Claims (9)
1. a kind of low-density alumina-magnesia castable, it is characterised in that using the porous aluminum magnesium alloy particles of 60~85wt% as aggregate, with
The corundum fine powder of 10~35wt%, the carbonization aluminium powder of 0.05~0.3wt%, the metal aluminum fiber establishment ball of 1~6wt% and 2~
The niobium phosphate of 8wt% is substrate material；Additional water-reducing agent and water mix.
2. low-density alumina-magnesia castable as described in claim 1, it is characterised in that the water-reducing agent is sodium tripolyphosphate, six inclined phosphorus
The mixture of sour sodium and poly carboxylic acid series water reducer；Additional amount is 1~3wt% of aggregate and substrate material gross mass.
3. low-density alumina-magnesia castable as described in claim 1, it is characterised in that the additional amount of the water is aggregate and substrate material
8~20wt% of gross mass.
4. low-density alumina-magnesia castable as described in claim 1, it is characterised in that the aobvious gas of the porous aluminum magnesium alloy particles
Porosity is 30~60%, average pore size < 20 μm, and grain diameter is 0.1~8mm.
5. low-density alumina-magnesia castable as described in claim 1, it is characterised in that the corundum fine powder or thin for plate diamond spar
The mixing of powder, white fused alumina fine powder or both；Grain composition: 70~90wt% of corundum fine powder that 150 μm~88 μm of partial size, partial size are small
In 88 μm of 10~30wt% of corundum fine powder.
6. low-density alumina-magnesia castable as described in claim 1, it is characterised in that the carbonization aluminium powder Al4C3Content >
96wt%；Grain composition: 88~7 μm of partial size of carbonization 5~15wt% of aluminium powder, 7~1 μm of partial size of carbonization aluminium powder 30~
45wt%, carbonization aluminium powder 50~60wt% of the partial size less than 1 μm.
7. low-density alumina-magnesia castable as described in claim 1, it is characterised in that the Al of the metal aluminum fiber establishment ball contains
Amount > 98wt%；Grain composition: 88~32 μm of partial size of metal aluminum fiber works out 10~15wt% of ball, and partial size is 32~4 μm of gold
Belong to aluminum fiber and work out 25~35wt% of ball, metal aluminum fiber establishment ball of the partial size less than 4 μm is 50~60wt%.
8. low-density alumina-magnesia castable as described in claim 1, it is characterised in that purity > 99wt% of the niobium phosphate；
Grade is matched: 88~9 μm of partial size are 15~20wt%, and 9~3 μm of partial size are 25~30wt%, partial size less than 3 μm for 50~
60wt%.
9. the preparation method of any one of claim 1 to the 8 low-density alumina-magnesia castable, it is characterised in that including following step
It is rapid:
Water-reducing agent and substrate material are premixed, then the substrate material after premix is added in aggregate, is then added water and stirred uniformly, casting vibration
Dynamic molding, green body after molding are 6~36 hours dry under the conditions of 110~150 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115650748A (en) * | 2022-11-21 | 2023-01-31 | 北京联合荣大工程材料股份有限公司 | Fiber-reinforced refractory castable and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010216A (en) * | 2010-12-20 | 2011-04-13 | 武汉科技大学 | Aluminum-magnesium light castable and preparation method thereof |
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- 2019-08-20 CN CN201910769681.0A patent/CN110407593A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010216A (en) * | 2010-12-20 | 2011-04-13 | 武汉科技大学 | Aluminum-magnesium light castable and preparation method thereof |
Non-Patent Citations (2)
| Title |
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| 中国冶金百科全书总编辑委员会《耐火材料》卷编辑部: "《中国冶金百科全书 耐火材料》", 31 October 1997, 冶金工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115650748A (en) * | 2022-11-21 | 2023-01-31 | 北京联合荣大工程材料股份有限公司 | Fiber-reinforced refractory castable and preparation method thereof |
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Application publication date: 20191105 |