CN103058694A - High-purity corundum-spinel composite material and preparation method thereof - Google Patents
High-purity corundum-spinel composite material and preparation method thereof Download PDFInfo
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- CN103058694A CN103058694A CN2013100402999A CN201310040299A CN103058694A CN 103058694 A CN103058694 A CN 103058694A CN 2013100402999 A CN2013100402999 A CN 2013100402999A CN 201310040299 A CN201310040299 A CN 201310040299A CN 103058694 A CN103058694 A CN 103058694A
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Abstract
The invention relates to a high-purity corundum-spinel composite material and a preparation method thereof. The scheme is as follows: the preparation method comprises the following steps: uniformly stirring 50-60 wt% of tabular corundum granule, 18-30 wt% of tabular corundum fine powder, 8-15 wt% of electrofused magnesia alumina spinel and 6-12 wt% of magnesium aluminum sol, casting to form, curing for 20-30 hours, demolding, and naturally standing for 20-30 hours; and keeping the temperature of 110-300 DEG C for 12-24 hours, and keeping the temperature of 900-1400 DEG C for 6-18 hours to obtain the high-purity corundum-spinel composite material, wherein the mol ratio of magnesium to aluminum in the magnesium aluminum sol is 1:(0.5-2.0), the granularity of the tabular corundum granule is 11-0.2mm, and the granularity of the tabular corundum fine powder is 1-200 mu m. The high-purity corundum-spinel composite material provided by the invention has the advantages of low impurity content, high melting point, high volume density, high high-temperature strength, high thermal shock stability, high scouring resistance and high slag penetration resistance, and is applicable to liners of superhigh-temperature industrial kilns and vessels.
Description
Technical field
The invention belongs to technical field of refractory materials, relate in particular to a kind of high-purity corundum-spinel composite material and preparation method thereof.
Background technology
The characteristics such as the corundum-spinel matrix material has that good thermal shock stability, fusing point are high, slag corrosion resistance and penetrating power are strong, thereby have a wide range of applications at metallurgy industry.But this matrix material still exists some shortcomings in preparation, matrix material mixes forming by cast usually take corundum (comprising white fused alumina or plate diamond spar or sub-white corundum or brown corundum), electric smelting or sintering magnesium-aluminium spinel, aluminous cement, ultrafine silica powder etc. as main raw material.Because the hybrid mode of material is mechanically mixing in the preparation process, various raw materials in compound, be difficult to distribute all with, thereby cause traditional corundum-spinel matrix material the unsettled phenomenon of quality in use to occur.Simultaneously, tradition corundum-spinel matrix material has used aluminous cement to be wedding agent (CaO of introducing is regarded as flux), and be aided with the flowability of ultrafine silica powder when improving the material construction, cause the lowest total of the melting point of matrix material that therefore obvious reduction (MgO-Al is arranged
2O
3-SiO
2Eutectoid point is about 1400 ℃ in the system), the maximum operation (service) temperature of matrix material is lower than 1700 ℃, has affected refractory materials military service performance at high temperature, so that the excellent properties of the mineral such as corundum, spinel fails to be fully utilized.
Summary of the invention
The present invention is intended to overcome the prior art defective, high-purity corundum-spinel composite material that purpose provides that a kind of foreign matter content is low, fusing point is high, volume density is large, hot strength is high, good thermal shock stability, slag corrosion resistance and anti-slag penetrating power are strong and preparation method thereof, this matrix material is applicable to the liner of ultrahigh-temperature Industrial Stoves and container.
For achieving the above object, the technical solution adopted in the present invention is: first the plate diamond spar particle of 50 ~ 60wt%, the plate diamond spar fine powder of 18 ~ 30wt%, the electric melting magnesium aluminum spinel of 8 ~ 15wt%, the magnalium colloidal sol of 6 ~ 12wt% are stirred, casting, maintenance 20 ~ 30 hours, the demoulding was placed 20 ~ 30 hours more naturally; Then under 110 ℃ ~ 300 ℃ conditions, be incubated 12 ~ 24 hours, under 900 ℃ ~ 1400 ℃ conditions, be incubated 6 ~ 18 hours at last, make high-purity corundum-spinel composite material.
Magnesium in the described magnalium colloidal sol and the mol ratio of aluminium are 1 ﹕ (0.5 ~ 2.0).
Al in the described plate diamond spar
2O
3Content 〉=98wt%, the particle diameter of plate diamond spar particle are 11 ~ 0.2mm, and the particle diameter of plate diamond spar fine powder is 1 ~ 200 μ m.
In the described electric melting magnesium aluminum spinel: Al
2O
3Content 〉=65wt%, MgO content 〉=20wt%; Electric melting magnesium aluminum spinel is one or both in electric melting magnesium aluminum spinel particle and the electric melting magnesium aluminum spinel fine powder, and the particle diameter of electric melting magnesium aluminum spinel particle is 1 ~ 0.2mm, and the particle diameter of electric melting magnesium aluminum spinel fine powder is 1 ~ 200 μ m.
Because adopt technique scheme, the present invention is wrapped in the raw mineral materials surface with magnalium colloidal sol in mixing process, magnalium colloidal sol follow-up burn till with use procedure in change magnesium-aluminium spinel into so that spinel is evenly distributed in the matrix of materials; Because spinel generates the volume effect of bringing, improved the volume density of material, thereby further improved the anti-slag penetration performance of material simultaneously; Moreover because there are many micropores on the plate diamond spar surface, colloidal sol is conducive to generate the magnesium-aluminium spinel network in matrix after infiltrating the space, has improved normal temperature and the hot strength of matrix material; The in addition gelation of colloidal sol in heat-processed can make material internal form fine network channel in order to discharging the inner gas that produces, and in the warm of phase Decrepitation Phenomena occurs before use thereby avoided this matrix material.
Therefore, the present invention prepared high-purity corundum-the spinel composite material foreign matter content is low, fusing point is high, volume density is large, hot strength is high, good thermal shock stability, slag corrosion resistance and anti-slag penetrating power are strong, be used for the liner of ultrahigh-temperature Industrial Stoves and ultrahigh-temperature container.
Embodiment
The present invention will be further described below in conjunction with embodiment, is not the restriction to its protection domain.
For avoiding repetition, the existing technical parameter unification that this embodiment is related is described below, and repeats no more among the embodiment:
Al in the plate diamond spar
2O
3Content 〉=98wt%, the particle diameter of plate diamond spar particle are 11 ~ 0.2mm, and the particle diameter of plate diamond spar fine powder is 1 ~ 200 μ m;
In the electric melting magnesium aluminum spinel: Al
2O
3Content 〉=65wt%, MgO content 〉=20wt%; The particle diameter of electric melting magnesium aluminum spinel particle is 1 ~ 0.2mm, and the particle diameter of electric melting magnesium aluminum spinel fine powder is 1 ~ 200 μ m.
Embodiment 1
A kind of high-purity corundum-spinel composite material and preparation method thereof.First the magnalium colloidal sol with the electric melting magnesium aluminum spinel fine powder of the plate diamond spar fine powder of the plate diamond spar particle of 55 ~ 60wt%, 18 ~ 20wt%, 11 ~ 15wt%, 9 ~ 12wt% stir, casting, maintenance 20 ~ 30 hours, the demoulding was placed 20 ~ 30 hours more naturally; Then under 110 ℃ ~ 150 ℃ conditions, be incubated 12 ~ 18 hours, under 900 ℃ ~ 1100 ℃ conditions, be incubated 9 ~ 12 hours at last, make high-purity corundum-spinel composite material.
Magnesium in the described magnalium colloidal sol of the present embodiment and the mol ratio of aluminium are 1 ﹕ (0.5 ~ 1.0).
Embodiment 2
A kind of high-purity corundum-spinel composite material and preparation method thereof.First the magnalium colloidal sol with the electric melting magnesium aluminum spinel particle of the electric melting magnesium aluminum spinel fine powder of the plate diamond spar fine powder of the plate diamond spar particle of 55 ~ 60wt%, 18 ~ 20wt%, 7 ~ 10wt%, 1 ~ 5wt%, 9 ~ 12wt% stir, casting, maintenance 20 ~ 30 hours, the demoulding was placed 20 ~ 30 hours more naturally; Then under 150 ℃ ~ 220 ℃ conditions, be incubated 18 ~ 20 hours, under 1100 ℃ ~ 1200 ℃ conditions, be incubated 8 ~ 10 hours at last, make high-purity corundum-spinel composite material.
Magnesium in the described magnalium colloidal sol of the present embodiment and the mol ratio of aluminium are 1 ﹕ (1.0 ~ 1.5).
Embodiment 3
A kind of high-purity corundum-spinel composite material and preparation method thereof.First the magnalium colloidal sol with the electric melting magnesium aluminum spinel particle of the plate diamond spar fine powder of the plate diamond spar particle of 52 ~ 55wt%, 28 ~ 30wt%, 8 ~ 11wt%, 6 ~ 9wt% stir, casting, maintenance 20 ~ 30 hours, the demoulding was placed 20 ~ 30 hours more naturally; Then under 220 ℃ ~ 300 ℃ conditions, be incubated 20 ~ 24 hours, under 1200 ℃ ~ 1400 ℃ conditions, be incubated 6 ~ 8 hours at last, make high-purity corundum-spinel composite material.
Magnesium in the described magnalium colloidal sol of the present embodiment and the mol ratio of aluminium are 1 ﹕ (1.5 ~ 2.0).
Embodiment 4
A kind of high-purity corundum-spinel composite material and preparation method thereof.First the plate diamond spar particle of 50 ~ 60wt%, the plate diamond spar fine powder of 18 ~ 30wt%, the electric melting magnesium aluminum spinel fine powder of 8 ~ 15wt%, the magnalium colloidal sol of 6 ~ 12wt% are stirred, casting, maintenance 20 ~ 30 hours, the demoulding was placed 20 ~ 30 hours more naturally; Then under 110 ℃ ~ 300 ℃ conditions, be incubated 20 ~ 24 hours, under 1200 ℃ ~ 1400 ℃ conditions, be incubated 10 ~ 12 hours at last, make high-purity corundum-spinel composite material
Magnesium in the described magnalium colloidal sol of the present embodiment and the mol ratio of aluminium are 1 ﹕ (0.5 ~ 1.0).
Embodiment 5
A kind of high-purity corundum-spinel composite material and preparation method thereof.First the plate diamond spar particle of 50 ~ 60wt%, the plate diamond spar fine powder of 18 ~ 30wt%, the electric melting magnesium aluminum spinel particle of 8 ~ 15wt%, the magnalium colloidal sol of 6 ~ 12wt% are stirred, casting, maintenance 20 ~ 30 hours, the demoulding was placed 20 ~ 30 hours more naturally; Then under 110 ℃ ~ 300 ℃ conditions, be incubated 20 ~ 24 hours, under 1200 ℃ ~ 1400 ℃ conditions, be incubated 10 ~ 12 hours at last, make high-purity corundum-spinel composite material.
Magnesium in the described magnalium colloidal sol of the present embodiment and the mol ratio of aluminium are 1 ﹕ (1.5 ~ 2.0).
This embodiment is wrapped in the raw mineral materials surface with magnalium colloidal sol in mixing process, magnalium colloidal sol follow-up burn till with use procedure in change magnesium-aluminium spinel into so that spinel is evenly distributed in the matrix of materials; Because spinel generates the volume effect of bringing, improved the volume density of material, thereby further improved the anti-slag penetration performance of material simultaneously; Moreover because there are many micropores on the plate diamond spar surface, colloidal sol is conducive to generate the magnesium-aluminium spinel network in matrix after infiltrating the space, has improved normal temperature and the hot strength of matrix material; The in addition gelation of colloidal sol in heat-processed can make material internal form fine network channel in order to discharging the inner gas that produces, and in the warm of phase Decrepitation Phenomena occurs before use thereby avoided this matrix material.
Therefore, this embodiment prepared high-purity corundum-the spinel composite material foreign matter content is low, fusing point is high, volume density is large, hot strength is high, good thermal shock stability, slag corrosion resistance and anti-slag penetrating power are strong, be used for the liner of ultrahigh-temperature Industrial Stoves and ultrahigh-temperature container.
Claims (5)
1. the preparation method of a high-purity corundum-spinel composite material, it is characterized in that: first the plate diamond spar particle of 50 ~ 60wt%, the plate diamond spar fine powder of 18 ~ 30wt%, the electric melting magnesium aluminum spinel of 8 ~ 15wt%, the magnalium colloidal sol of 6 ~ 12wt% are stirred, casting, maintenance 20 ~ 30 hours, the demoulding was placed 20 ~ 30 hours more naturally; Then under 110 ℃ ~ 300 ℃ conditions, be incubated 12 ~ 24 hours, under 900 ℃ ~ 1400 ℃ conditions, be incubated 6 ~ 18 hours at last, make high-purity corundum-spinel composite material.
2. the preparation method of described high-purity corundum-spinel composite material according to claim 1 is characterized in that magnesium in the described magnalium colloidal sol and the mol ratio of aluminium are 1 ﹕ (0.5 ~ 2.0).
3. the preparation method of described high-purity corundum-spinel composite material according to claim 1 is characterized in that the Al in the described plate diamond spar
2O
3Content 〉=98wt%, the particle diameter of plate diamond spar particle are 11 ~ 0.2mm, and the particle diameter of plate diamond spar fine powder is 1 ~ 200 μ m.
4. the preparation method of described high-purity corundum-spinel composite material according to claim 1 is characterized in that in the described electric melting magnesium aluminum spinel: Al
2O
3Content 〉=65wt%, MgO content 〉=20wt%; Electric melting magnesium aluminum spinel is one or both in electric melting magnesium aluminum spinel particle and the electric melting magnesium aluminum spinel fine powder, and the particle diameter of electric melting magnesium aluminum spinel particle is 1 ~ 0.2mm, and the particle diameter of electric melting magnesium aluminum spinel fine powder is 1 ~ 200 μ m.
5. the prepared corundum-spinel matrix material of preparation method of each described high-purity corundum-spinel composite material according to claim 1 ~ 4.
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Cited By (5)
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| CN104478449A (en) * | 2014-12-03 | 2015-04-01 | 武汉钢铁(集团)公司 | Machined carbon-free corundum spinel brick for ladles and preparation method thereof |
| CN105272198A (en) * | 2015-10-10 | 2016-01-27 | 中国科学院合肥物质科学研究院 | High-temperature anti-corrosion coating material, and usage method and application thereof |
| CN105461291A (en) * | 2015-11-25 | 2016-04-06 | 中钢集团洛阳耐火材料研究院有限公司 | Sample bearing plate and pressing rod for refractory material high-temperature bending-resistant tester and for applying load |
| CN107140951A (en) * | 2017-07-11 | 2017-09-08 | 辽宁中镁高温材料有限公司 | A kind of whisker composite high-performance magnesia brick and its manufacture method |
| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478449A (en) * | 2014-12-03 | 2015-04-01 | 武汉钢铁(集团)公司 | Machined carbon-free corundum spinel brick for ladles and preparation method thereof |
| CN105272198A (en) * | 2015-10-10 | 2016-01-27 | 中国科学院合肥物质科学研究院 | High-temperature anti-corrosion coating material, and usage method and application thereof |
| CN105272198B (en) * | 2015-10-10 | 2018-07-10 | 中国科学院合肥物质科学研究院 | A kind of high-temperature corrosion-resistant coating material and its application method and application |
| CN105461291A (en) * | 2015-11-25 | 2016-04-06 | 中钢集团洛阳耐火材料研究院有限公司 | Sample bearing plate and pressing rod for refractory material high-temperature bending-resistant tester and for applying load |
| CN107140951A (en) * | 2017-07-11 | 2017-09-08 | 辽宁中镁高温材料有限公司 | A kind of whisker composite high-performance magnesia brick and its manufacture method |
| CN107140951B (en) * | 2017-07-11 | 2020-05-12 | 辽宁中镁高温材料有限公司 | Whisker composite high-performance magnesia brick and manufacturing method thereof |
| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN113943167B (en) * | 2021-12-02 | 2022-12-27 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
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Application publication date: 20130424 |