CN107935007A - The method that after baking prepares alumina with high temperature and low sodium - Google Patents
The method that after baking prepares alumina with high temperature and low sodium Download PDFInfo
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- CN107935007A CN107935007A CN201711203952.3A CN201711203952A CN107935007A CN 107935007 A CN107935007 A CN 107935007A CN 201711203952 A CN201711203952 A CN 201711203952A CN 107935007 A CN107935007 A CN 107935007A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/46—Purification of aluminium oxide, aluminium hydroxide or aluminates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
- C01F7/023—Grinding, deagglomeration or disintegration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
- C01F7/442—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination in presence of a calcination additive
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention discloses the method that after baking prepares alumina with high temperature and low sodium, comprise the following steps that：First, industrial aluminium hydroxide is subjected to preroast；Secondly, the raw material after preroast is ground under conditions of de-sodium agent is added, washed afterwards for several times, drying；Then, after baking is carried out under conditions of inhibitor is added to the raw material after above-mentioned drying；Finally, the raw material after after baking is subjected to fine grinding under conditions of grinding aid is added, you can low sodium, fine grain, the alumina product of high dispersive is made.The method has the advantages that flow is short, energy consumption is low, easily operated, it is easy to accomplish industrialized production, a new process route is provided to prepare high-purity ultra-fine alumina.
Description
Technical field
The present invention relates to the production technology of high temperature ultra-fine alumina, more particularly to a kind of after baking prepares the low sodium oxygen of high temperature
Change the method for aluminium.
Background technology
High temperature ultra-fine alumina belongs to special-alumina series, for the thermostabilization phase formed after aqueous alumina high-temperature roasting
α-Al2O3, have whiteness height, fine size, particle diameter distribution is uniform, crystalline form is perfect, high rigidity, high intensity, corrosion-resistant, high temperature resistant etc.
A series of excellent specific properties, are one of new materials of world today's fast development, can be used to prepare refractory material, automobile spark plug,
The products such as electronic substrates, grinding, wear-resisting engineering machinery part, high alumina ceramic.Statistics shows that the market of high temperature ultra-fine alumina holds
Amount accounts for 25% or so of special-alumina total amount, has broad application prospects.
At present, the development potentiality of China's high temperature ultra-fine alumina is huge, but also there are larger gap compared with external, mainly
The market demand cannot be met by showing the purity, granularity, dispersiveness of home products.The currently research to high temperature ultra-fine alumina and
Not enough, many products are also in laboratory development phase, it is impossible to are produced in batches for exploitation dynamics.Therefore, in China's high temperature
The preparation of ultra-fine alumina also has very big development space.The method for preparing high temperature ultra-fine alumina at present mainly has：Aluminium carbonate
Ammonium, organo-aluminium pyrolysismethod etc., these methods there are complex process, production cost is higher the problems such as.Also expert proposes new
High temperature ultra-fine alumina preparation method, such as patent of invention in Publication No. CN102070168A《Utilize CO 2 reduction oxygen
Change the method for sodium oxide molybdena in aluminium》In, by aluminium hydroxide preroast, product of roasting is configured to aqueous solution afterwards, and it is water-soluble to this
Lead to CO in liquid2Gas is sufficiently stirred, while adds a small amount of de-sodium agent, then separation of solid and liquid and is dried, after high-temperature calcination it is low
Sodium alumina product.This method passes through the CO that has more than needed2The mother liquor alkali and lattice alkali in aluminium oxide are reacted away, reduces containing for sodium oxide molybdena
Amount, it is but higher to the granularity requirements of raw material, it is desirable to particle diameter≤50 μm of aluminium hydroxide, and the temperature of high-temperature calcination for 1100~
1450 DEG C, energy consumption is higher.In addition, in the patent of invention of Publication No. CN104860342A《It is prepared by a kind of high-purity ultra-fine alumina
Method and products thereof》In, industrial aluminium hydroxide is first roasted and obtains primary γ-Al afterwards2O3, then clean, filter, dry, roast
Intermediate γ-Al2O3, then clean to obtain alumina solution again, finally alumina solution is filtered, is dried, is roasted, after ball milling it is high
Pure ultra-fine alumina product, alumina powder pattern made from this method are spherical, and dispersiveness is higher, and granularity is smaller, and purity
Up to 99.95%, but technological process is complicated, and cost is higher.
To meet the market demand growing to the ultra-fine low sodium alumina of high temperature, set forth herein one kind production is low
Na2O, fine size and the alumina preparation method being evenly distributed, this method flow is simple, advantage of lower cost, is easy to implement work
Industry metaplasia is produced.
The content of the invention
The purpose of the present invention is to propose to a kind of method that after baking prepares alumina with high temperature and low sodium.First, by industrial hydrogen
Aluminium oxide carries out preroast；Secondly, the raw material after preroast is ground on the basis of de-sodium agent is added, washs number afterwards
It is secondary, drying；Then, after baking is carried out under conditions of inhibitor is added to the raw material after above-mentioned drying；Finally, by secondary roasting
Raw material after burning carries out fine grinding under conditions of grinding aid is added, you can low sodium, fine grain, the alumina product of high dispersive is made.
The present invention concrete technical scheme be：The method that after baking prepares alumina with high temperature and low sodium, comprises the following steps：
(1) industrial aluminium hydroxide is put into porcelain crucible, 1~3h of preroast at being 400~600 DEG C in temperature, after cooling
Obtain gama-alumina；
(2) de-sodium agent for accounting for gama-alumina mass percent 0.3~3% is added into gama-alumina, is ground, washes
Wash, filter, dry, obtain granularity D50In 10~30 μm of low sodium gama-alumina；
(3) inhibitor is added into low sodium gama-alumina, 2~3h of after baking is carried out at 900~1100 DEG C, is obtained
Alpha-alumina；
(4) grinding aid is added into Alpha-alumina and carries out fine grinding, the low sodium ultra-fine alumina of high temperature is made；
The low sodium ultra-fine alumina of the high temperature is α-Al2O3>95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D501~3
μm the low sodium ultra-fine alumina of high temperature.
Further, wet lapping after lapping mode is dry grinding, wet grinding or first does in above-mentioned steps (2).
Further, during above-mentioned dry grinding, the de-sodium agent of addition is oxalic acid, citric acid, one kind in glycine or several
Kind；During above-mentioned wet grinding, the de-sodium agent of addition is acetic acid, hydrogen peroxide, sulfurous acid, carbonic acid, hydrochloric acid, one kind in sulfuric acid or
It is several.
Further, in above-mentioned steps (3), the inhibitor is magnesium carbonate and α-Al2O3Crystal seed；Wherein, magnesium carbonate adds
The mass percent that amount accounts for total material is 0.5~2.5%, α-Al2O3Seed charge account for the mass percent of total material for 1~
10%.
Further, in above-mentioned steps (4), the grinding aid for aluminium chloride, organosilicon, lanolin, oleic acid, aphthenic acids,
One or more in enuatrol, dodecyl amine oxide, aliphatic acid, sodium metasilicate, calgon.
Further, in above-mentioned steps (4), the grinding aid addition account for total quality of material percentage for 0.03~
0.3%.
The beneficial effects of the present invention are：
1. the method that the after baking of the present invention prepares alumina with high temperature and low sodium realizes and prepares low sodium, fine grain, high dispersive
Alumina product.
2. the method that the after baking of the present invention prepares alumina with high temperature and low sodium adds acid de-sodium agent in process of lapping,
Aluminium oxide mother liquor alkali can not only be neutralized, moreover it is possible to reacted with the aluminium oxide lattice alkali being exposed in process of lapping, reduce oxidation
The content of sodium oxide molybdena in aluminium, avoids grinding the pickling process after crushing in traditional handicraft, therefore reduces being produced into for aluminium oxide
This, simplifies technological process, and easy to operate, is easy to implement industrialized production, improves economic benefit.
3. the method that the after baking of the present invention prepares alumina with high temperature and low sodium adds inhibitor during after baking
Magnesium carbonate (MgCO3), it can effectively suppress growing up for alumina grain, so as to have the function that crystal grain thinning.
4. the present invention after baking prepare alumina with high temperature and low sodium method with the addition of during after baking α-
Al2O3Crystal seed, can effectively reduce after baking temperature, significantly reduce energy consumption and cost.
Brief description of the drawings
Fig. 1 is published《Utilize the method for CO 2 reduction sodium oxide in aluminum oxide》Process flow chart.
Fig. 2 is the process flow chart that the after baking of the present invention prepares the method for alumina with high temperature and low sodium.
Embodiment
It is published with Fig. 1《Utilize the method for CO 2 reduction sodium oxide in aluminum oxide》Technological process compare, this
Invention removing sodium in grinding process, not only reduces sodium oxide content in product, and obtains the thinner aluminium oxide of granularity, and
The calcining heat that inhibitor reduce further is added in second of roasting process, reduces production cost and energy consumption.Specifically
Step contrast is as shown in table 1.
1 this patent process route of table is compared with the prior art
With it is published《A kind of high-purity ultra-fine alumina preparation method and products thereof》Technological process compare, work of the present invention
Skill flow is simple, and raw material granularity is not required, reduces production cost.
Technology contents below by embodiment continuing on the present invention.
Embodiment 1
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 3h at being 400 DEG C in temperature, after cooling
To granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3It is ground, lapping mode uses dry grinding, in the analysis of addition 0.3%
Pure oxalic acid (H2C2O4) be de-sodium agent on the basis of, grind 2.5h after, with the ultrasonic cleaning that frequency is 25kHz, power is 150W
Stood after device stirring 1h, washed for several times with water decantation, 2h is dried under the conditions of 100 DEG C, obtain granularity D50At 10~30 μm
Low sodium γ-Al2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 0.5%3Afterwards, secondary roasting is carried out at 900 DEG C
3h is burnt, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3Fine grinding is carried out after the grinding aid aluminium chloride of addition 0.03%, α-Al are made2O3
>95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50In the low sodium ultra-fine alumina of 1~3 μm of high temperature.
Embodiment 2
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 1h at being 600 DEG C in temperature, after cooling
To granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3Be ground, lapping mode uses wet grinding, add 0.4% analysis it is pure
Acetic acid (CH3COOH) it is to grind after 0.5h with the ultrasonic cleaning that frequency is 130kHz, power is 150W on the basis of de-sodium agent
Stood after device stirring 1.5h, washed for several times with water decantation, 1.5h is dried under the conditions of 150 DEG C, obtain granularity D50In 10~30 μ
The low sodium γ-Al of m2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 2.5%3With 5% α-Al2O3After crystal seed, in
After baking 2h is carried out at 1000 DEG C, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3In the grinding aid aluminium chloride and 0.01% grinding aid aliphatic acid of addition 0.02%
After carry out fine grinding, α-Al are made2O3>95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50It is ultra-fine in the low sodium of 1~3 μm of high temperature
Aluminium oxide.
Embodiment 3
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 2h at being 500 DEG C in temperature, after cooling
To granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3It is ground, lapping mode is using wet grinding after first dry grinding, dry method
During grinding, in the pure oxalic acid (H of analysis of addition 1.5%2C2O4) it is on the basis of de-sodium agent, grinding 1h, carries out wet method and grinds afterwards
Mill, in the pure acetic acid (CH of analysis of addition 0.1%3COOH it is) on the basis of de-sodium agent, with frequency is 60kHz after grinding 2h, work(
The ultrasonic cleaner that rate is 150W is stood after stirring 0.5h, is washed for several times with water decantation, is dried under the conditions of 125 DEG C
1.5h, obtains granularity D50In 10~30 μm of low sodium γ-Al2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 1.5%3With 2% α-Al2O3After crystal seed, in
After baking 2h is carried out at 1100 DEG C, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3After the grinding aid aliphatic acid and 0.1% grinding aid sodium metasilicate of addition 0.3%
Fine grinding is carried out, α-Al are made2O3>95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50In the ultra-fine oxygen of the low sodium of 1~3 μm of high temperature
Change aluminium.
Embodiment 4
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 2.5h at being 450 DEG C in temperature, after cooling
Obtain granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3It is ground, lapping mode uses dry grinding, pure in the analysis of addition 2%
Citric acid (H3C6H5O7) be de-sodium agent on the basis of, grind 4h after, with the ultrasonic cleaning that frequency is 80kHz, power is 150W
Stood after device stirring 1h, washed for several times with water decantation, 2h is dried under the conditions of 100 DEG C, obtain granularity D50At 10~30 μm
Low sodium γ-Al2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 1.2%3With 5% α-Al2O3After crystal seed, in
After baking 3h is carried out at 1050 DEG C, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3Fine grinding is carried out after the grinding aid aluminium chloride of addition 0.05%, α-Al are made2O3
>95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50In the low sodium ultra-fine alumina of 1~3 μm of high temperature.
Embodiment 5
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 1.5h at being 550 DEG C in temperature, after cooling
Obtain granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3It is ground, lapping mode uses wet grinding, in the analysis of addition 0.5%
Pure hydrogen peroxide (H2O2) and 0.2% the pure sulfurous acid (H of analysis2SO3) be de-sodium agent on the basis of, grind 2h after, be with frequency
120kHz, the ultrasonic cleaner that power is 150W are stood after stirring 0.5h, are washed for several times with water decantation, in 110 DEG C of conditions
Lower drying 2h, obtains granularity D50In 10~30 μm of low sodium γ-Al2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 1.4%3With 8% α-Al2O3After crystal seed, in
After baking 2h is carried out at 950 DEG C, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3Fine grinding is carried out after the grinding aid organosilicon of addition 0.6%, α-Al are made2O3>
95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50In the low sodium ultra-fine alumina of 1~3 μm of high temperature.
Embodiment 6
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 3h at being 450 DEG C in temperature, after cooling
To granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3It is ground, lapping mode uses dry grinding, in the analysis of addition 1.5%
Pure oxalic acid (H2C2O4) and 0.1% the pure glycine (C of analysis2H5O2N) be de-sodium agent on the basis of, grind 2h after, be with frequency
120kHz, the ultrasonic cleaner that power is 150W are stood after stirring 0.5h, are washed for several times with water decantation, in 110 DEG C of conditions
Lower drying 2h, obtains granularity D50In 10~30 μm of low sodium γ-Al2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 1.4%3With 8% α-Al2O3After crystal seed, in
After baking 2h is carried out at 950 DEG C, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3Fine grinding is carried out after the grinding aid organosilicon of addition 0.2%, α-Al are made2O3>
95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50In the low sodium ultra-fine alumina of 1~3 μm of high temperature.
Embodiment 7
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 1h at being 550 DEG C in temperature, after cooling
To granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3It is ground, lapping mode is using wet grinding after first dry grinding, dry method
During grinding, in the pure oxalic acid (H of analysis of addition 0.8%2C2O4) and 0.5% the pure citric acid (H of analysis3C6H5O7) it is de-sodium agent
On the basis of, 2.5h is ground, carries out wet grinding afterwards, on the basis that the analysis pure hydrochloric acid (HCl) of addition 0.1% is de-sodium agent
On, after grinding 0.5h, with being stood after the ultrasonic cleaner stirring 1h that frequency is 80kHz, power is 150W, washed with water decantation
Wash for several times, 1.5h is dried under the conditions of 110 DEG C, obtain granularity D50In 10~30 μm of low sodium γ-Al2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 2.3%3With 6% α-Al2O3After crystal seed, in
After baking 3h is carried out at 950 DEG C, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3In the grinding aid aliphatic acid and 0.2% grinding aid sodium metasilicate of addition 0.15%
After carry out fine grinding, α-Al are made2O3>95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50It is ultra-fine in the low sodium of 1~3 μm of high temperature
Aluminium oxide.
Embodiment 8
The method that after baking prepares alumina with high temperature and low sodium, carries out according to the following steps：
(1) industrial aluminium hydroxide is put into clean porcelain crucible, preroast 2.5h at being 600 DEG C in temperature, after cooling
Obtain granularity D50In 70~90 μm of γ-Al2O3；
(2) by the γ-Al of above-mentioned acquisition2O3It is ground, lapping mode is using wet grinding after first dry grinding, dry method
During grinding, in the pure glycine (C of analysis of addition 1%2H5O2N) and 0.8% the pure citric acid (H of analysis3C6H5O7) it is de-sodium agent
On the basis of, 0.5h is ground, carries out wet grinding afterwards, in the pure hydrogen peroxide (H of analysis of addition 0.5%2O2) and 0.2%
Analytical pure sulfuric acid (H2SO4) be de-sodium agent on the basis of, grind 1h after, it is clear with the ultrasonic wave that frequency is 50kHz, power is 150W
Stood after washing device stirring 1.5h, washed for several times with water decantation, 1.5h is dried under the conditions of 140 DEG C, obtain granularity D5010~
30 μm of low sodium γ-Al2O3；
(3) by the γ-Al of above-mentioned acquisition2O3In the inhibitor MgCO of addition 1.8%3With 3% α-Al2O3After crystal seed, in
After baking 2h is carried out at 1000 DEG C, obtains granularity D50In 10~30 μm of α-Al2O3；
(4) by the α-Al of above-mentioned acquisition2O3After the grinding aid aphthenic acids and 0.1% grinding aid oleic acid of addition 0.05%
Fine grinding is carried out, α-Al are made2O3>95%th, sodium oxide molybdena (Na2O)<0.15%th, granularity D50In the ultra-fine oxygen of the low sodium of 1~3 μm of high temperature
Change aluminium.
Claims (9)
1. the method that after baking prepares alumina with high temperature and low sodium, it is characterised in that comprise the following steps：
(1) industrial aluminium hydroxide is put into porcelain crucible, 1~3h of preroast at being 400~600 DEG C in temperature, obtains after cooling
Gama-alumina；
(2) de-sodium agent for accounting for gama-alumina mass percent 0.3~3% is added into gama-alumina, be ground, wash,
Filtering, drying, obtain granularity D50In 10~30 μm of low sodium gama-alumina；
(3) inhibitor is added into low sodium gama-alumina, 2~3h of after baking is carried out at 900~1100 DEG C, obtains α-oxygen
Change aluminium；
(4) grinding aid is added into Alpha-alumina and carries out fine grinding, the low sodium ultra-fine alumina of high temperature is made.
2. the method that after baking according to claim 1 prepares alumina with high temperature and low sodium, it is characterised in that step (2)
In, wet lapping after the lapping mode is dry grinding, wet grinding or first does.
3. the method that after baking according to claim 2 prepares alumina with high temperature and low sodium, it is characterised in that dry grinding
When, the de-sodium agent of addition is the one or more in oxalic acid, citric acid, glycine；During wet grinding, the de-sodium agent of addition is vinegar
One or more in acid, hydrogen peroxide, sulfurous acid, carbonic acid, hydrochloric acid, sulfuric acid.
4. the method that the after baking according to claim 1 or 2 or 3 prepares alumina with high temperature and low sodium, it is characterised in that step
Suddenly in (3), the inhibitor is magnesium carbonate and α-Al2O3Crystal seed；Wherein, magnesium carbonate addition accounts for the mass percent of total material
For 0.5~2.5%, α-Al2O3The mass percent that Seed charge accounts for total material is 1~10%.
5. the method that the after baking according to claim 1 or 2 or 3 prepares alumina with high temperature and low sodium, it is characterised in that step
Suddenly in (4), the grinding aid is aluminium chloride, organosilicon, lanolin, oleic acid, aphthenic acids, enuatrol, dodecyl amine oxide, fat
One or more in fat acid, sodium metasilicate, calgon.
6. the method that after baking according to claim 4 prepares alumina with high temperature and low sodium, it is characterised in that step (4)
In, the grinding aid for aluminium chloride, organosilicon, lanolin, oleic acid, aphthenic acids, enuatrol, dodecyl amine oxide, aliphatic acid,
One or more in sodium metasilicate, calgon.
7. the method that the after baking according to claim 1 or 2 or 3 or 6 prepares alumina with high temperature and low sodium, its feature exist
In in step (4), the mass percent that the grinding aid addition accounts for total material is 0.03~0.3%.
8. the method that after baking according to claim 4 prepares alumina with high temperature and low sodium, it is characterised in that step (4)
In, the mass percent that the grinding aid addition accounts for total material is 0.03~0.3%.
9. the method that after baking according to claim 5 prepares alumina with high temperature and low sodium, it is characterised in that step (4)
In, the fine grinding is 0.03~0.3% with the mass percent that grinding aid addition accounts for total material.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947500A (en) * | 2018-08-16 | 2018-12-07 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of low sodium abrasion-resistant corundum product and preparation method |
| CN109368674A (en) * | 2018-12-26 | 2019-02-22 | 贵州博汇联润铝业有限公司 | A kind of high temperature resistant low-sodium aluminum hydroxide micro mist preparation method |
| CN109607584A (en) * | 2019-01-31 | 2019-04-12 | 东北大学 | A kind of preparation method of the ultralow sodium alumina powder material of high temperature |
| CN110040754A (en) * | 2019-04-30 | 2019-07-23 | 湖南工业大学 | A kind of method of the weak hydrogen removing sodium potassium of alumina powder vacuum |
| CN110625109A (en) * | 2019-09-30 | 2019-12-31 | 中南大学 | Preparation method of submicron aluminum-based alloy powder |
| CN110642281A (en) * | 2019-09-23 | 2020-01-03 | 中国铝业股份有限公司 | Preparation method of alpha-phase superfine low-sodium alumina powder |
| CN114988886A (en) * | 2022-06-01 | 2022-09-02 | 洛阳中超新材料股份有限公司 | Preparation method of high-purity alpha-alumina powder capable of being sintered at low temperature |
| CN115340114A (en) * | 2022-09-13 | 2022-11-15 | 三门峡义翔铝业有限公司 | Production device and production process of ultralow-sodium aluminide |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947500A (en) * | 2018-08-16 | 2018-12-07 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of low sodium abrasion-resistant corundum product and preparation method |
| CN109368674A (en) * | 2018-12-26 | 2019-02-22 | 贵州博汇联润铝业有限公司 | A kind of high temperature resistant low-sodium aluminum hydroxide micro mist preparation method |
| CN109607584A (en) * | 2019-01-31 | 2019-04-12 | 东北大学 | A kind of preparation method of the ultralow sodium alumina powder material of high temperature |
| CN110040754A (en) * | 2019-04-30 | 2019-07-23 | 湖南工业大学 | A kind of method of the weak hydrogen removing sodium potassium of alumina powder vacuum |
| CN110040754B (en) * | 2019-04-30 | 2022-01-21 | 湖南工业大学 | Method for removing sodium and potassium from alumina powder through weak hydrogen in vacuum |
| CN110642281A (en) * | 2019-09-23 | 2020-01-03 | 中国铝业股份有限公司 | Preparation method of alpha-phase superfine low-sodium alumina powder |
| CN110625109A (en) * | 2019-09-30 | 2019-12-31 | 中南大学 | Preparation method of submicron aluminum-based alloy powder |
| CN114988886A (en) * | 2022-06-01 | 2022-09-02 | 洛阳中超新材料股份有限公司 | Preparation method of high-purity alpha-alumina powder capable of being sintered at low temperature |
| CN114988886B (en) * | 2022-06-01 | 2023-05-12 | 洛阳中超新材料股份有限公司 | Preparation method of high-purity alpha-alumina powder capable of being sintered at low temperature |
| CN115340114A (en) * | 2022-09-13 | 2022-11-15 | 三门峡义翔铝业有限公司 | Production device and production process of ultralow-sodium aluminide |
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