CN110304906A - A kind of preparation method of alumina ceramic grinding ball - Google Patents
A kind of preparation method of alumina ceramic grinding ball Download PDFInfo
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- CN110304906A CN110304906A CN201910496472.3A CN201910496472A CN110304906A CN 110304906 A CN110304906 A CN 110304906A CN 201910496472 A CN201910496472 A CN 201910496472A CN 110304906 A CN110304906 A CN 110304906A
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Abstract
The invention discloses a kind of preparation methods of alumina ceramic grinding ball, the preparation method includes the following steps: 1) to make alumina balls seed: the alumina powder that purity 99.99%-99.995%, granularity D50 are 0.8-1.0 μm, screening, group's ball, sol solution is added during group's ball, control moisture is sieved when to appear spherical in 15-30%, control obtains alumina balls seed having a size of 0.25-0.35mm；2) make green-ball: alumina balls seed that step 1) obtains rolls into a ball ball long ball, continues to sieve alumina powder being added and spraying sol solution, and control moisture is 18-30%, sieve be compacted obtain density reach 1.35-1.45g/ml ball it is stand-by as finished product green-ball；3) it calcines: by finished product green-ball by selecting, carrying out 1620 DEG C of -1650 DEG C of calcinings, obtaining real density is 3.8-4.0g/cm3, purity is>99.99%, and abrasion<5g/kg is as alumina ceramic grinding ball finished product.The present invention can reduce the cost of production high-purity alumina powder nanosizing；The loss of alumina balls is lower in use process, stable product quality.
Description
Technical field
The invention belongs to alumina powder preparation technical fields, in particular it relates to a kind of high-purity, high grinding effect
The preparation method of rate, low-loss alumina ceramic grinding ball.
Background technique
Currently, the usage amount of high purity aluminium oxide at home and abroad rises increasingly, and domestic middle and high end alumina industry market
Substantially it is monopolized by external import aluminium oxide, low-end market has the offer of most domestic product substantially.From the point of view of existing market situation,
Domestic high purity aluminium oxide high-end market development stability and vigorous, market is huge.External product quality height, better performances, but price
The huge bonus of valuableness, high-end market is exclusively enjoyed by overseas enterprise.Currently, high purity alumina powder is being prepared applied to special field
Demand be gradually increased, high requirement is proposed for abrasive media, the price of high purity aluminium oxide mill ball of Japan exists at present
It 2000 yuan/kg or more, since the high purity aluminium oxide mill ball abrasion of current domestic production are high, intensity is low, is used in sand mill
There are problems that broken ball, and use cost is too big, so, the grinding mill that the country uses, which is situated between, is essentially zirconia ball, and because oxygen
Change zirconium ball hardness and be lower than alumina powder, causes the decline of high purity aluminium oxide powder purity serious.So producing a kind of high performance
High purity aluminium oxide mill ball, providing a kind of available high-performance high purity aluminium oxide mill ball for high purity aluminium oxide powder industry is exactly
The task of top priority.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of alumina ceramic grinding ball, can reduce production high purity aluminium oxide
The cost of powder nanosizing；The loss of alumina balls is lower in use process, stable product quality.
In order to achieve the above objectives, present invention employs the following technical solutions:
A kind of preparation method of alumina ceramic grinding ball, the preparation method include the following steps:
1) alumina balls seed is made:
Ball is rolled into a ball in the alumina powder that purity is 99.99%-99.995%, granularity D50 is 0.8-1.0 μm, screening, rolls into a ball ball mistake
Sol solution is added in journey, control moisture is sieved when to appear spherical in 15-30%, is controlled having a size of 0.25-0.35mm,
Obtain alumina balls seed；
2) green-ball is made:
The alumina balls seed that step 1) obtains rolls into a ball ball long ball, continues sieve alumina powder and is added and sprays sol solution, controls
Moisture is 18-30%, screening compacting obtain density reach 1.35-1.45g/ml ball it is stand-by as finished product green-ball；
3) it calcines:
By finished product green-ball by selecting, 1620 DEG C of -1650 DEG C of calcinings are carried out, obtaining real density is 3.8-4.0g/cm3,
Purity is>99.99%, and abrasion<5g/kg is as alumina ceramic grinding ball finished product.
Preferably, the sol solution is acrylate sol solution.
Preferably, the alumina powder that purity 99.99%-99.995%, granularity D50 are 0.8-1.0 μm is used with lower section
Method preparation:
Using purity >=99.995% high purity aluminium oxide as raw material, uses high purity water to be equipped with 20%-60% as solvent and consolidate
Containing slurry, in obtaining through wet grinding, drying and air-flow crushing, purity is 99.99%-99.995%, granularity D50 is 0.8-1.0 μ
The alumina powder of m.
Preferably, the wet grinding specifically:
Wet grinding is carried out using sand mill, cooperation 0.8-1.0mm alumina ceramic grinding ball carries out grinding slurry to 0.5-1.0
μm, grinding revolving speed is 800-900r/h.
Preferably, the crushing pressure of the air-flow crushing is 5-8Mpa, and crushing frequency is 58-65Hz.
Preferred embodiment in accordance with the present invention, a kind of preparation method of alumina ceramic grinding ball, the preparation method include such as
Lower step:
The preparation of alumina ceramic grinding ball formula powder: with high purity aluminium oxide (4N5) for raw material, high purity water is used to match as solvent
Standby 20%-60% contains slurry admittedly and carries out wet grinding in sand mill, and cooperation 0.8-1.0mm alumina ceramic grinding ball carries out grinding slurry
To 0.5-1.0 μm, grinding revolving speed is 800-900r/h, and slurry is dried, due to occurring agglomeration in the drying process,
By air-flow crushing, crushing pressure is 5-8Mpa, and crushing frequency is 58-65Hz, it is ensured that process product are without agglomeration, aluminium oxide after crushing
(purity 99.99%-99.995%, D50:0.8-1.0 μm) is spare as group's ball raw material.
The preparation of alumina balls:
Green-ball is manufactured:
Alumina balls seed is made, alumina ceramic grinding ball formula powder will be prepared first sieves with 100 mesh sieve net and sieve, and add
Enter into ball machine, in the state that ball machine rolls, the acrylate sol solution for being dissolved in water is added while rolling, plays
It is adhered effect, control moisture is sieved when to appear spherical, controlled having a size of 0.25- between 15-30% in manufacturing process
0.35mm, it is mellow and full to obtain surface, glossy, the seed of no special-shaped ball.
The seed prepared using early period starts long ball in ball machine, continues sieve powder during long ball and is added to rolling
Group's ball machine in, sprinkling is dissolved in the sol solution of water, controls moisture for 18-30% between, prepares qualified size by sieving
Green-ball.
The green-ball for carrying out qualified size will be screened out to be compacted in ball machine, screen out surface it is glossy, without elliptical shape ball,
The ball that no three corner-kick, density reach 1.35-1.45g/ml is stand-by as finished product green-ball.
It is selected with the green-ball being compacted by frame of choosing shuttles, selects the more spare calcining of rounding alumina balls.
Calcining: the green-ball selected is encased in high-temperature ceramic copple 1620 DEG C -1650 DEG C of the progress in high temperature furnace and is forged
3.5-6h is burnt, obtaining real density is 3.8-4.0g/cm3, purity is>99.99%, and abrasion<5g/kg is as alumina ceramic grinding ball
Finished product.
The high purity water (High purity water) that the present invention uses controls, one according to the control standard in industry
As when referring to 25 DEG C conductivity less than 0.1 μ s/cm and residual salt content be less than 0.3mg/L, and eliminate the micro of non-dielectric
The water of the impurity such as bacterium, microorganism, particle.Preparation method has distillation, UF membrane, ion exchange and sterilizing.
Compared with the prior art, the advantages of the present invention are as follows:
1, alumina ceramic grinding ball itself purity is higher, does not have purity pollution to grinding material, reduces to the high pure oxygen of grinding
Change the pollution of aluminium material；
2, intensity is high, grinding abrasion are lower；Grinding efficiency is high；Performance is stablized, and is lost in process of lapping lower；
3, low grinding abrasion, do not occur broken ball situation and are not easy to plug milling apparatus in use.
Detailed description of the invention
Fig. 1 is high purity aluminium oxide mill ball preparation technology flow chart.
Specific embodiment
Any feature is disclosed to obtain in this specification, it unless specifically stated, can be equivalent or with similar purpose by other
Alternative features are replaced.Unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.It is described to understand the present invention just for the sake of help, it should not be considered as to concrete restriction of the invention.
With the drawings and specific embodiments, the present invention is described in further detail below.
Embodiment one:
As shown in Figure 1, a kind of preparation method of alumina ceramic grinding ball, the preparation method include the following steps:
The preparation of alumina ceramic grinding ball formula powder: it with high purity aluminium oxide (4N5) for raw material, is equipped with by solvent of high purity water
35% carries out wet grinding in sand mill containing slurry admittedly, and cooperation 0.8-1.0mm alumina ceramic grinding ball carries out grinding slurry to 0.8 μ
M, grinding revolving speed are 900r/h, and slurry is dried, due to occurring agglomeration in the drying process, by air-flow crushing,
Crushing pressure is 6Mpa, and crushing frequency is 60Hz, it is ensured that for process product without agglomeration, it is 99.995%, granularity that purity is obtained after crushing
D50 is that 0.892 μm of aluminium oxide is spare as group's ball raw material.
The preparation of alumina balls:
Green-ball is manufactured:
Alumina balls seed is made, alumina ceramic grinding ball formula powder will be prepared first sieves with 100 mesh sieve net and sieve, and add
Enter into ball machine, in the state that ball machine rolls, the acrylate sol solution for being dissolved in water is added while rolling, plays
It is adhered effect, measuring moisture is 18.27%, is sieved when to appear spherical, controls size in 0.27-0.30mm, obtains table
Face is mellow and full, glossy, the seed of no special-shaped ball.
The seed prepared using early period starts long ball in ball machine, continues sieve powder during long ball and is added to rolling
Group's ball machine in, sprinkling is dissolved in the acrylate sol solution of water, and control moisture is 24.04%, prepares size by screening and exists
Green-ball between 0.85-1.05mm.
The green-ball for carrying out qualified size will be screened out to be compacted in ball machine, screen out surface it is glossy, without elliptical shape ball,
The ball that no three corner-kick, density reach 1.3988g/ml is stand-by as finished product green-ball.
It is selected with the green-ball being compacted by frame of choosing shuttles, selects the spare calcining of the preferable alumina balls of sphericity.
Calcining: the green-ball selected being encased in high-temperature ceramic copple and is calcined in high temperature furnace, calcination temperature are as follows:
1645 DEG C, 3.5h is kept the temperature, obtaining real density is 3.8945g/cm3, purity 99.992%, abrasion 3.7g/kg is as oxidation
Aluminium mill ball finished product.
Embodiment two:
As shown in Figure 1, a kind of preparation method of alumina ceramic grinding ball, the preparation method include the following steps:
The preparation of alumina ceramic grinding ball formula powder: being solvent 20% using high purity water with high purity aluminium oxide (4N5) for raw material
Admittedly carrying out wet grinding in sand mill containing slurry, cooperation 0.8-1.0mm alumina ceramic grinding ball carries out grinding slurry to 0.65 μm, grinds
Mill revolving speed is 850r/h, and slurry is dried, and due to occurring agglomeration in the drying process, by air-flow crushing, is crushed
Pressure is 6.5Mpa, and crushing frequency is 65Hz, it is ensured that process product are without agglomeration, and aluminum oxide grain size is 0.901 μm of spare work after crushing
For a ball raw material.
The preparation of alumina balls:
Green-ball is manufactured:
Alumina balls seed is made, alumina ceramic grinding ball formula powder will be prepared first sieves with 100 mesh sieve net and sieve, and add
Enter into ball machine, in the state that ball machine rolls, the acrylate sol solution for being dissolved in water is added while rolling, plays
It is adhered effect, measuring moisture is 30%, is sieved when to appear spherical, and control size obtains surface circle in 0.30-0.33mm
Profit, glossy, the seed of no special-shaped ball.
The seed prepared using early period starts long ball in ball machine, continues sieve powder during long ball and is added to rolling
Group's ball machine in, sprinkling is dissolved in the acrylate sol solution of water, and control moisture is 19.62%, by screening prepare having a size of
Green-ball between 0.80-0.98mm.
The green-ball for carrying out qualified size will be screened out to be compacted in ball machine, screen out surface it is glossy, without special-shaped ball,
The ball that density reaches 1.3994g/ml is stand-by as finished product green-ball.
It is selected with the green-ball being compacted by frame of choosing shuttles, selects the spare calcining of the preferable alumina balls of sphericity.
Calcining: the green-ball selected being encased in high-temperature ceramic copple and is calcined in high temperature furnace, calcination temperature are as follows:
1620 DEG C, 6h is kept the temperature, obtaining real density is 3.9012g/cm3, purity 99.992%, 4.21g/kg is as aluminium oxide for abrasion
Mill ball finished product.
Embodiment three:
As shown in Figure 1, a kind of preparation method of alumina ceramic grinding ball, the preparation method include the following steps:
The preparation of alumina ceramic grinding ball formula powder: being solvent 60% using high purity water with high purity aluminium oxide (4N5) for raw material
Admittedly carrying out wet grinding in sand mill containing slurry, cooperation 0.8-1.0mm alumina ceramic grinding ball carries out grinding slurry to 0.5 μm, grinds
Mill revolving speed is 800r/h, and slurry is dried, and due to occurring agglomeration in the drying process, by air-flow crushing, is crushed
Pressure is 5Mpa, and crushing frequency is 65Hz, it is ensured that process product are without agglomeration, and aluminum oxide grain size is 0.901 μm of spare conduct after crushing
Group's ball raw material.
The preparation of alumina balls:
Green-ball is manufactured:
Alumina balls seed is made, alumina ceramic grinding ball formula powder will be prepared first sieves with 100 mesh sieve net and sieve, and add
Enter into ball machine, in the state that ball machine rolls, the acrylate sol solution for being dissolved in water is added while rolling, plays
It is adhered effect, measuring moisture is 15%, is sieved when to appear spherical, and control size obtains surface circle in 0.25-0.33mm
Profit, glossy, the seed of no special-shaped ball.
The seed prepared using early period starts long ball in ball machine, continues sieve powder during long ball and is added to rolling
Group's ball machine in, sprinkling is dissolved in the acrylate sol solution of water, and control moisture is 30%, by screening prepare having a size of
Green-ball between 0.80-0.99mm.
The green-ball for carrying out qualified size will be screened out to be compacted in ball machine, screen out surface it is glossy, without special-shaped ball,
The ball that density reaches 1.448g/ml is stand-by as finished product green-ball.
It is selected with the green-ball being compacted by frame of choosing shuttles, selects the spare calcining of the preferable alumina balls of sphericity.
Calcining: the green-ball selected being encased in high-temperature ceramic copple and is calcined in high temperature furnace, calcination temperature are as follows:
1650 DEG C, 5h is kept the temperature, obtaining real density is 3.9875g/cm3, purity 99.992%, 4.21g/kg is as aluminium oxide for abrasion
Mill ball finished product.
Technological parameter (such as temperature, time) section bound value of the invention and interval value can realize this law,
Embodiment numerous to list herein.
Ordinary skill in the art knowledge can be used in the unspecified content of the present invention.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be apparent to an ordinarily skilled person in the art that technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (5)
1. a kind of preparation method of alumina ceramic grinding ball, the preparation method include the following steps:
1) alumina balls seed is made:
The alumina powder that purity is 99.99%-99.995%, granularity D50 is 0.8-1.0 μm sieves, group's ball, during group's ball
Sol solution is added, control moisture is sieved when to appear spherical in 15-30%, controls having a size of 0.25-0.35mm, obtain
Alumina balls seed；
2) green-ball is made:
The alumina balls seed that step 1) obtains rolls into a ball ball long ball, continues sieve alumina powder and is added and sprays sol solution, controls moisture
For 18-30%, screening compacting obtain density reach 1.35-1.45g/ml ball it is stand-by as finished product green-ball；
3) it calcines:
By finished product green-ball by selecting, 1620 DEG C of -1650 DEG C of calcinings are carried out, obtaining real density is 3.8-4.0g/cm3, purity is
>99.99%, abrasion<5g/kg are as alumina ceramic grinding ball finished product.
2. preparation method according to claim 1, which is characterized in that the sol solution is acrylate sol solution.
3. preparation method according to claim 1, which is characterized in that purity 99.99%-99.995%, granularity D50 are
0.8-1.0 μm of alumina powder is prepared using following methods:
Using purity >=99.995% high purity aluminium oxide as raw material, uses high purity water to be equipped with 20%-60% as solvent and contain slurry admittedly
Expect that purity is 99.99%-99.995%, granularity D50 is 0.8-1.0 μm in obtaining through wet grinding, drying and air-flow crushing
Alumina powder.
4. preparation method according to claim 3, which is characterized in that the wet grinding specifically:
Wet grinding is carried out using sand mill, cooperates 0.8-1.0mm alumina ceramic grinding ball progress grinding slurry to 0.5-1.0 μm,
Grinding revolving speed is 800-900r/h.
5. preparation method according to claim 3, which is characterized in that the crushing pressure of the air-flow crushing is 5-8Mpa,
Crushing frequency is 58-65Hz.
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Cited By (7)
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| CN110590340A (en) * | 2019-10-29 | 2019-12-20 | 洛阳市科创绿色建材研究院 | Preparation method of andalusite-containing high-wear-resistance alumina grinding body |
| CN111072375A (en) * | 2019-12-31 | 2020-04-28 | 青海圣诺光电科技有限公司 | Preparation method of aluminum oxide grinding balls |
| CN111116183A (en) * | 2019-12-31 | 2020-05-08 | 青海圣诺光电科技有限公司 | Preparation method of alumina ceramic grinding ball |
| CN111116179A (en) * | 2019-12-31 | 2020-05-08 | 青海圣诺光电科技有限公司 | Calcination method of alumina grinding balls |
| EP3882226A1 (en) * | 2020-03-19 | 2021-09-22 | Sigmund Lindner GmbH | Spherical aluminium oxide bodies |
| CN117735961A (en) * | 2023-12-21 | 2024-03-22 | 任红波 | Method for preparing alumina grinding medium by titration method |
| CN117735962A (en) * | 2023-12-21 | 2024-03-22 | 宁波国锋新材料科技有限公司 | Alumina grinding medium and preparation method thereof |
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| CN111072375A (en) * | 2019-12-31 | 2020-04-28 | 青海圣诺光电科技有限公司 | Preparation method of aluminum oxide grinding balls |
| CN111116183A (en) * | 2019-12-31 | 2020-05-08 | 青海圣诺光电科技有限公司 | Preparation method of alumina ceramic grinding ball |
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| CN117735961A (en) * | 2023-12-21 | 2024-03-22 | 任红波 | Method for preparing alumina grinding medium by titration method |
| CN117735962A (en) * | 2023-12-21 | 2024-03-22 | 宁波国锋新材料科技有限公司 | Alumina grinding medium and preparation method thereof |
| CN117735961B (en) * | 2023-12-21 | 2024-05-31 | 任红波 | Method for preparing alumina grinding medium by titration method |
| CN117735962B (en) * | 2023-12-21 | 2024-06-11 | 宁波国锋新材料科技有限公司 | Alumina grinding medium and preparation method thereof |
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