CN106495714A - A kind of cellular titanium calcium aluminate hollow ball and preparation method thereof - Google Patents
A kind of cellular titanium calcium aluminate hollow ball and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of cellular titanium calcium aluminate hollow ball and preparation method thereof.Its technical scheme is：Press ilmenite: rutile: the mass ratio of magnetic iron ore is 100: (3 ~ 13): (5 ~ 15), ilmenite, rutile and magnetic iron ore are mixed, again mixed mixed powder is added in electromagnetic induction furnace, 1300 ~ 1400 DEG C are warming up to, is incubated；Then mixed powder is pressed: the mass ratio of aluminium powder is 100: (25 ~ 30), aluminium powder is added in electromagnetic induction furnace, be warming up to 1550 ~ 1600 DEG C, be incubated；Mixed powder is finally pressed: the mass ratio of limestone powder body is 100: (8 ~ 10), limestone powder body is added in electromagnetic induction furnace, be warming up to 1950 ~ 2000 DEG C, be incubated；Slag is separated from slag-drip opening, with the compressed air spraying slag of 0.4 ~ 0.8MPa, is cooled down, is obtained final product cellular titanium calcium aluminate hollow ball.Present invention process is simple, low production cost and balling ratio are high；Prepared cellular titanium calcium aluminate hollow ball bulk density is little, thermal conductivity is low and cold conditions compressive resistance is big.
Description
Technical field
The invention belongs to titanium calcium aluminate hollow ball technical field.Specifically related to a kind of cellular titanium calcium aluminate hollow ball and its
Preparation method.
Background technology
Hollow ball refractory material is the excellent fireclay insulating refractory of a class, can be used to produce hollow ball refractory product or direct
High temperature kiln is used for bulk material, its outward appearance is spherical in shape（Or elliposoidal）, inner hollow is held one's breath hole, thus hollow ball fire proofed wood
The heat conductivity of material is less.
At present, the preparation method of hollow ball refractory material mainly includes foaming, template and electric smelting blowing process.
Hollow ball refractory material is prepared using foaming, such as a kind of " preparation side of light aluminum oxide hollow ball insulating product
Method "（201410434384.8）Patented technology, mainly by get angry effect of the foaming agent in liquid medium, through slurry curing,
Stand aftershaping.The stability of hollow ball refractory material, foaming agent selection and bubble is prepared to material property shadow using foaming
Ring significantly, and foaming prepare hollow ball refractory material technical process complex.
Hollow ball refractory material is prepared using template, such as " a kind of ball non-sticky to aluminum alumina hollow ball and preparation method thereof "
（201210007134.7）Patented technology, size mainly according to template, characteristic carry out " cladding "（Granulation process）, then pass through
The techniques such as surface modification, heat treatment prepare hollow ball refractory material.Hollow ball refractory material is prepared using template, to template
Select requirement higher, and hollow ball inside pore shape is single（It is not suitable for preparing cellular hollow ball refractory material）.
Hollow ball refractory material is prepared using electric smelting blowing process, such as " a kind of preparation method of high-strength alumina hollow ball "
（201010120320.2）Patented technology, the technology are that high-temperature fusant is blowed in the presence of high pressure draught droplet,
In the cooling procedure of whereabouts, droplet surface is cooled and solidified rapidly, and drop internal is still in molten condition, further cooling procedure
In, inner melt solidification produces larger volume contraction, forms hollow ball.The contraction produced in process of setting is bigger, formation
Spherical shell is thinner.Characteristic due to variety classes melt（Surface tension, viscosity such as melt）Significant difference, and then affect hollow ball
The intensity and thermal conductivity of refractory material.
Content of the invention
It is contemplated that overcoming prior art defect, it is therefore an objective to provide a kind of process is simple, low production cost and balling ratio
The preparation method of high cellular titanium calcium aluminate hollow ball.Volume with the cellular titanium calcium aluminate hollow ball prepared by the method
Density is little, thermal conductivity is low and cold conditions compressive resistance is big.
For achieving the above object, the technical solution used in the present invention is：Press ilmenite: rutile: the mass ratio of magnetic iron ore
For 100: (3 ~ 13): (5 ~ 15), ilmenite, rutile and magnetic iron ore are added in blender, is mixed 0.3 ~ 0.5 hour, is obtained
Mixed powder.The mixed powder is added in electromagnetic induction furnace, with the ramp of 8 ~ 10 DEG C/min to 1300 ~ 1400 DEG C,
Insulation 5 ~ 10 minutes.The mixed powder is pressed again: the mass ratio of aluminium powder is 100: (25 ~ 30), aluminum is added in electromagnetic induction furnace
Powder, with the ramp of 5 ~ 8 DEG C/min to 1550 ~ 1600 DEG C, is incubated 5 ~ 10 minutes.Then the mixed powder: limestone is pressed
The mass ratio of powder body is 100: (8 ~ 10), limestone powder body is added in electromagnetic induction furnace, with the ramp of 3 ~ 5 DEG C/min extremely
1950 ~ 2000 DEG C, it is incubated 5 ~ 10 minutes；The slag in electromagnetic induction furnace is separated from slag-drip opening, finally using 0.4 ~ 0.8MPa's
Compressed air spraying slag, cooling, obtains final product cellular titanium calcium aluminate hollow ball.
The main chemical compositions of the ilmenite are：TiO2Content >=55wt%, Fe2O3Content >=30wt%；The grain of ilmenite
Degree≤0.2mm.
The TiO of the rutile2Content >=95wt%；Granularity≤the 0.2mm of rutile.
The main chemical compositions of the magnetic iron ore are：Fe2O3Content >=70wt%, SiO2Content≤5wt%, content of MgO≤
5wt%, CaO content≤5wt%, MnO2Content≤8wt%；Granularity≤the 0.2mm of magnetic iron ore.
Al content >=the 97wt% of the aluminium powder；Granularity≤30 μm of aluminium powder.
The CaCO of the limestone powder body3Content >=95wt%；Granularity≤the 0.5mm of limestone powder body.
Due to adopting above-mentioned technical proposal, the present invention to have the positive effect that compared with prior art：
（1）To smelt the slag produced by ferro-titanium, directly injection is obtained cellular titanium calcium aluminate hollow ball, technique to the present invention
Process is simple, greatly reduces preparation cost；
（2）The present invention is sufficiently stirred for slag by the magnetic effect of metal bath, is improved the uniformity of slag component, is entered
And increase balling ratio and the cold conditions compressive resistance of cellular titanium calcium aluminate hollow ball；" injection-oxidation reaction " shape is utilized simultaneously
Into hole of holding one's breath, the bulk density and thermal conductivity of cellular titanium calcium aluminate hollow ball is reduced.
Cellular titanium calcium aluminate hollow ball prepared by the present invention is after testing：Balling ratio is 99.2 ~ 99.7%, bulk density
For 0.6 ~ 1.1g/cm3, heat conductivity is 0.40 ~ 0.65W m-1·K-1, cold conditions compressive resistance is 7.5 ~ 8.0MPa.
Therefore, process is simple of the invention, low production cost and balling ratio are high；Prepared cellular titanium calcium aluminate is hollow
The characteristics of ball has little bulk density, low thermal conductivity and big cold conditions compressive resistance.
Specific embodiment
With reference to specific embodiment, the invention will be further described, not the restriction to its protection domain.
For avoiding repeating, first will be as follows for the material Unify legislation involved by this specific embodiment, in specific embodiment not
Repeat again：
The main chemical compositions of the ilmenite are：TiO2Content >=55wt%, Fe2O3Content >=30wt%；The granularity of ilmenite≤
0.2mm.
The TiO of the rutile2Content >=95wt%；Granularity≤the 0.2mm of rutile.
The main chemical compositions of the magnetic iron ore are：Fe2O3Content >=70wt%, SiO2Content≤5wt%, content of MgO≤
5wt%, CaO content≤5wt%, MnO2Content≤8wt%；Granularity≤the 0.2mm of magnetic iron ore.
Al content >=the 97wt% of the aluminium powder；Granularity≤30 μm of aluminium powder.
The CaCO of the limestone powder body3Content >=95wt%；Granularity≤the 0.5mm of limestone powder body.
Embodiment 1
A kind of cellular titanium calcium aluminate hollow ball and preparation method thereof.Its preparation method is：Press ilmenite: rutile: magnetic iron ore
Mass ratio be 100: (3 ~ 7): (5 ~ 9), ilmenite, rutile and magnetic iron ore are added in blender, mixing is 0.3 ~ 0.5 little
When, obtain mixed powder.By the mixed powder add electromagnetic induction furnace in, with the ramp of 8 ~ 10 DEG C/min to 1300 ~
1400 DEG C, it is incubated 5 ~ 10 minutes.The mixed powder is pressed again: the mass ratio of aluminium powder is 100: (25 ~ 27), in electromagnetic induction furnace
Aluminium powder is added, with the ramp of 5 ~ 8 DEG C/min to 1550 ~ 1600 DEG C, 5 ~ 10 minutes is incubated.Then by the mixed powder:
The mass ratio of limestone powder body is 100: (8 ~ 9), limestone powder body is added in electromagnetic induction furnace, with the speed of 3 ~ 5 DEG C/min
1950 ~ 2000 DEG C are warming up to, 5 ~ 10 minutes are incubated；The slag in electromagnetic induction furnace is separated from slag-drip opening, finally using 0.4 ~
The compressed air spraying slag of 0.7MPa, cooling, obtains final product cellular titanium calcium aluminate hollow ball.
Cellular titanium calcium aluminate hollow ball manufactured in the present embodiment is after testing：Balling ratio is 99.2 ~ 99.4%, bulk density
For 0.6 ~ 0.8g/cm3, heat conductivity is 0.40 ~ 0.50W m-1·K-1, cold conditions compressive resistance is 7.5 ~ 7.7MPa.
Embodiment 2
A kind of cellular titanium calcium aluminate hollow ball and preparation method thereof.Its preparation method is：Press ilmenite: rutile: magnetic iron ore
Mass ratio be 100: (5 ~ 9): (7 ~ 11), ilmenite, rutile and magnetic iron ore are added in blender, mixing is 0.3 ~ 0.5 little
When, obtain mixed powder.By the mixed powder add electromagnetic induction furnace in, with the ramp of 8 ~ 10 DEG C/min to 1300 ~
1400 DEG C, it is incubated 5 ~ 10 minutes.The mixed powder is pressed again: the mass ratio of aluminium powder is 100: (26 ~ 28), in electromagnetic induction furnace
Aluminium powder is added, with the ramp of 5 ~ 8 DEG C/min to 1550 ~ 1600 DEG C, 5 ~ 10 minutes is incubated.Then by the mixed powder:
The mass ratio of limestone powder body is 100: (8 ~ 9), limestone powder body is added in electromagnetic induction furnace, with the speed of 3 ~ 5 DEG C/min
1950 ~ 2000 DEG C are warming up to, 5 ~ 10 minutes are incubated；The slag in electromagnetic induction furnace is separated from slag-drip opening, finally using 0.4 ~
The compressed air spraying slag of 0.7MPa, cooling, obtains final product cellular titanium calcium aluminate hollow ball.
Cellular titanium calcium aluminate hollow ball manufactured in the present embodiment is after testing：Balling ratio is 99.3 ~ 99.5%, bulk density
For 0.7 ~ 0.9g/cm3, heat conductivity is 0.45 ~ 0.55W m-1·K-1, cold conditions compressive resistance is 7.6 ~ 7.8MPa.
Embodiment 3
A kind of cellular titanium calcium aluminate hollow ball and preparation method thereof.Its preparation method is：Press ilmenite: rutile: magnetic iron ore
Mass ratio be 100: (7 ~ 11): (9 ~ 13), ilmenite, rutile and magnetic iron ore are added in blender, mixing is 0.3 ~ 0.5 little
When, obtain mixed powder.By the mixed powder add electromagnetic induction furnace in, with the ramp of 8 ~ 10 DEG C/min to 1300 ~
1400 DEG C, it is incubated 5 ~ 10 minutes.The mixed powder is pressed again: the mass ratio of aluminium powder is 100: (27 ~ 29), in electromagnetic induction furnace
Aluminium powder is added, with the ramp of 5 ~ 8 DEG C/min to 1550 ~ 1600 DEG C, 5 ~ 10 minutes is incubated.Then by the mixed powder:
The mass ratio of limestone powder body is 100: (9 ~ 10), limestone powder body is added in electromagnetic induction furnace, with the speed of 3 ~ 5 DEG C/min
1950 ~ 2000 DEG C are warming up to, 5 ~ 10 minutes are incubated；The slag in electromagnetic induction furnace is separated from slag-drip opening, finally using 0.5 ~
The compressed air spraying slag of 0.8MPa, cooling, obtains final product cellular titanium calcium aluminate hollow ball.
Cellular titanium calcium aluminate hollow ball manufactured in the present embodiment is after testing：Balling ratio is 99.4 ~ 99.6%, bulk density
For 0.8 ~ 1.0g/cm3, heat conductivity is 0.50 ~ 0.60W m-1·K-1, cold conditions compressive resistance is 7.7 ~ 7.9MPa.
Embodiment 4
A kind of cellular titanium calcium aluminate hollow ball and preparation method thereof.Its preparation method is：Press ilmenite: rutile: magnetic iron ore
Mass ratio be 100: (9 ~ 13): (11 ~ 15), by ilmenite, rutile and magnetic iron ore add blender in, mixing 0.3 ~ 0.5
Hour, obtain mixed powder.The mixed powder is added in electromagnetic induction furnace, with the ramp of 8 ~ 10 DEG C/min to 1300
~ 1400 DEG C, it is incubated 5 ~ 10 minutes.The mixed powder is pressed again: the mass ratio of aluminium powder is 100: (28 ~ 30), to electromagnetic induction furnace
Middle addition aluminium powder, with the ramp of 5 ~ 8 DEG C/min to 1550 ~ 1600 DEG C, is incubated 5 ~ 10 minutes.Then the mixed powder is pressed
: the mass ratio of limestone powder body is 100: (9 ~ 10), limestone powder body is added in electromagnetic induction furnace, with the speed of 3 ~ 5 DEG C/min
Rate is warming up to 1950 ~ 2000 DEG C, is incubated 5 ~ 10 minutes；The slag in electromagnetic induction furnace is separated from slag-drip opening, finally using 0.5 ~
The compressed air spraying slag of 0.8MPa, cooling, obtains final product cellular titanium calcium aluminate hollow ball.
Cellular titanium calcium aluminate hollow ball manufactured in the present embodiment is after testing：Balling ratio is 99.5 ~ 99.7%, bulk density
For 0.9 ~ 1.1g/cm3, heat conductivity is 0.55 ~ 0.65W m-1·K-1, cold conditions compressive resistance is 7.8 ~ 8.0MPa.
This specific embodiment is had the positive effect that compared with prior art：
（1）Directly the prepared cellular titanium calcium aluminate of injection is hollow to smelt the slag produced by ferro-titanium for this specific embodiment
Ball, technical process are simple, greatly reduce preparation cost；
（2）This specific embodiment is sufficiently stirred for slag by the magnetic effect of metal bath, improves slag component
Uniformity, and then increase balling ratio and the cold conditions compressive resistance of cellular titanium calcium aluminate hollow ball；" injection-oxygen is utilized simultaneously
Change reaction " hole of holding one's breath is formed, reduce the bulk density and thermal conductivity of cellular titanium calcium aluminate hollow ball.
Cellular titanium calcium aluminate hollow ball prepared by this specific embodiment is after testing：Balling ratio is 99.2 ~ 99.7%,
Bulk density is 0.6 ~ 1.1g/cm3, heat conductivity is 0.40 ~ 0.65W m-1·K-1, cold conditions compressive resistance is 7.5 ~ 8.0MPa.
Therefore, the process is simple of this specific embodiment, low production cost and balling ratio are high；Prepared cellular titanium aluminum
The characteristics of sour calcium hollow ball has little bulk density, low thermal conductivity and big cold conditions compressive resistance.
Claims (7)
1. a kind of preparation method of cellular titanium calcium aluminate hollow ball, it is characterised in that the preparation method is comprised the concrete steps that：
Press ilmenite: rutile: the mass ratio of magnetic iron ore is 100: (3 ~ 13): (5 ~ 15), by ilmenite, rutile and magnetic iron ore
Add in blender, mix 0.3 ~ 0.5 hour, obtain mixed powder；The mixed powder is added in electromagnetic induction furnace, with 8 ~
The ramp of 10 DEG C/min is incubated 5 ~ 10 minutes to 1300 ~ 1400 DEG C；Again by the mixed powder: the mass ratio of aluminium powder is
100: (25 ~ 30), in electromagnetic induction furnace add aluminium powder, with the ramp of 5 ~ 8 DEG C/min to 1550 ~ 1600 DEG C, insulation 5 ~
10 minutes；Then the mixed powder is pressed: the mass ratio of limestone powder body is 100: (8 ~ 10), stone is added in electromagnetic induction furnace
Lime stone powder body, with the ramp of 3 ~ 5 DEG C/min to 1950 ~ 2000 DEG C, is incubated 5 ~ 10 minutes；Electromagnetic induction is separated from slag-drip opening
Slag in stove, finally using the compressed air spraying slag of 0.4 ~ 0.8MPa, cooling obtains final product cellular titanium calcium aluminate hollow
Ball.
2. the preparation method of cellular titanium calcium aluminate hollow ball according to claim 1, it is characterised in that the ilmenite
Main chemical compositions be：TiO2Content >=55wt%, Fe2O3Content >=30wt%；Granularity≤the 0.2mm of ilmenite.
3. the preparation method of cellular titanium calcium aluminate hollow ball according to claim 1, it is characterised in that the rutile
TiO2Content >=95wt%；Granularity≤the 0.2mm of rutile.
4. the preparation method of cellular titanium calcium aluminate hollow ball according to claim 1, it is characterised in that the magnetic iron ore
Main chemical compositions be：Fe2O3Content >=70wt%, SiO2Content≤5wt%, content of MgO≤5wt%, CaO content≤5wt%,
MnO2Content≤8wt%；Granularity≤the 0.2mm of magnetic iron ore.
5. the preparation method of cellular titanium calcium aluminate hollow ball according to claim 1, it is characterised in that the aluminium powder
Al content >=97wt%；Granularity≤30 μm of aluminium powder.
6. the preparation method of cellular titanium calcium aluminate hollow ball according to claim 1, it is characterised in that the limestone
The CaCO of powder body3Content >=95wt%；Granularity≤the 0.5mm of limestone powder body.
7. a kind of cellular titanium calcium aluminate hollow ball, it is characterised in that the cellular titanium calcium aluminate hollow ball is will according to right
Ask the cellular titanium calcium aluminate prepared by the preparation method of cellular titanium calcium aluminate hollow ball any one of 1 ~ 6 hollow
Ball.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904982A (en) * | 2017-03-24 | 2017-06-30 | 武汉科技大学 | High alumina insulating refractory raw material with ferrotianium slag as major ingredient and preparation method thereof |
| CN111925222A (en) * | 2020-08-05 | 2020-11-13 | 辽宁科技大学 | Method for preparing refractory ball for hot blast furnace by using aluminum titanium slag |
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| CN111925222A (en) * | 2020-08-05 | 2020-11-13 | 辽宁科技大学 | Method for preparing refractory ball for hot blast furnace by using aluminum titanium slag |
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| CN106495714B (en) | 2019-04-26 |
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Application publication date: 20170315 Assignee: Wuhan Chuanfu metal materials Co., Ltd Assignor: WUHAN University OF SCIENCE AND TECHNOLOGY Contract record no.: X2020420000002 Denomination of invention: A honeycomb calcium titanate hollow sphere and its preparation method Granted publication date: 20190426 License type: Common License Record date: 20201021 |
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