CN104045101A - Drying and smashing method of aluminum hydroxide - Google Patents
Drying and smashing method of aluminum hydroxide Download PDFInfo
- Publication number
- CN104045101A CN104045101A CN201410293673.0A CN201410293673A CN104045101A CN 104045101 A CN104045101 A CN 104045101A CN 201410293673 A CN201410293673 A CN 201410293673A CN 104045101 A CN104045101 A CN 104045101A
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- China
- Prior art keywords
- aluminum hydroxide
- aluminium hydroxide
- drying
- fine white
- oven dry
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Abstract
The invention discloses a drying and smashing method of aluminum hydroxide and relates to a drying and smashing method in preparation of fine white aluminum hydroxide with a low oil factor. The method is characterized by comprising the following steps: in the drying process of aluminum hydroxide, drying at 60-90 DEG C by adopting a paddle drier; and dispersing the small agglomerated blocks generated in the drying process of aluminum hydroxide and soft agglomerates among particles in a smasher under the effect of a rotary blade of which the rotating speed is 2500-3500r/min. By adopting the paddle drier to dry fine white aluminum hydroxide filter cakes, the method disclosed by the invention avoids the influence of the drying process on surface characteristics of the fine white aluminum hydroxide. By adopting the high-speed smasher to smash fine white aluminum hydroxide at a high speed, soft agglomerates among aluminum hydroxide particles and the small agglomerated blocks generated in the drying process are thoroughly dispersed, so that the product dispersibility is improved and the oil factor is reduced. The oil factor of fine white aluminum hydroxide can be reduced to 28-32ml/100g.
Description
Technical field
An oven dry breaking method for aluminium hydroxide, relates to a kind of oven dry breaking method of preparing the tenderly white aluminium hydroxide process of low oil-absorption(number).
Background technology
At present, the oven dry of tenderly white aluminium hydroxide adopts atomization circulation stoving process conventionally, and the heat source of this stoving process is the hot blast of 300 DEG C, fully contacts with the aluminium hydroxide droplet under atomizing spray, and moment completes the oven dry of tenderly white aluminium hydroxide.The heat source temperature of this stoving process is high, and thermal source directly contacts with heated medium, affects the surface property of tenderly white aluminum hydroxide particles, causes product oil-absorption(number) high, and pine fills, refitting density is low.Current tenderly white aluminium hydroxide product oil-absorption(number) reaches 44ml/100g, loose density 0.22g/cm
3, refitting density 0.38 g/cm
3.
Summary of the invention
Object of the present invention is exactly the deficiency existing for above-mentioned prior art, and a kind of surface property that can effectively improve tenderly white aluminum hydroxide particles is provided, and reduces product oil-absorption(number) high, the oven dry breaking method of the aluminium hydroxide that pine fills, refitting density is high.
The object of the invention is to be achieved through the following technical solutions.
A kind of oven dry breaking method of aluminium hydroxide, it is characterized in that the drying course of aluminium hydroxide is at 60 DEG C of-90 DEG C of temperature, adopt paddle formula dryer to dry, aluminium hydroxide after oven dry is in pulverizer, be under the rotating blade effect of turn/min of 2500-3500 at rotating speed, soft-agglomerated the scattering between brief summary scar piece and the particle that makes to produce in drying course.
The oven dry breaking method of a kind of aluminium hydroxide of the present invention, is characterized in that aluminium hydroxide is in pulverizer, by the soft-agglomerated loose density 0.35-0.45 g/cm that is dispersed between the brief summary scar piece producing in drying course and particle
3, refitting density 0.6-0.7g/cm
3.
The oven dry breaking method of a kind of aluminium hydroxide of the present invention, adopt oar blade type dryer to dry tenderly white aluminium hydroxide, the drying course of tenderly white aluminium hydroxide carries out at low temperatures, can not impact the surface property of tenderly white aluminium hydroxide, avoid high-temperature hot-air in atomization circulation drying course to contact with the direct of tenderly white aluminium hydroxide.The present invention is applied to pulverizer in the production technique of tenderly white aluminium hydroxide, solve the tenderly white aluminum hydroxide scab piece forming during oar blade type is dried, also solved the agglomeration traits between tenderly white aluminum hydroxide particles, the dispersing property of tenderly white aluminium hydroxide is significantly improved.
Compared with original atomization circulation stoving process, tenderly white aluminium hydroxide oil-absorption(number) prepared by the present invention is reduced to 28-32ml/100g by original 44ml/100g, and loose density is by 0.22 original g/cm
3be increased to 0.35-0.45 g/cm
3, refitting density by 0.38 g/cm
3be increased to 0.6-0.7g/cm
3.
Embodiment
A kind of oven dry breaking method of aluminium hydroxide, the drying course of its aluminium hydroxide is at 60 DEG C of-90 DEG C of temperature, adopt paddle formula dryer to dry, aluminium hydroxide after oven dry is in pulverizer, be under the rotating blade effect of turn/min of 2500-3500 at rotating speed, soft-agglomerated the scattering between brief summary scar piece and the particle that makes to produce in drying course.
The step of specific operation process comprises:
(1) the tenderly white aluminium hydroxide of water content 30%-50% is delivered to oar blade type dryer feed opening place through rotary conveyor, then by star-like feeder discharging to dryer.The paddle of tenderly white aluminium hydroxide is dried thermal source and is adopted high pressure steam, is distributed in the chuck of spiral promotion hot box and dryer both sides.
(2) groomed oar rachis exists
transmission systemdrive lower slowly rotation, drive tenderly white aluminum hydroxide filter cake slowly to move forward, be subject to hollow blade and chuck heating simultaneously and make filtration cakes torrefaction at course of conveying.
(3) the tenderly white aluminium hydroxide moisture content 0%-3% of oar after dry enters high speed disintegrator under airflow function, relies on remaining temperature to complete the thorough oven dry of tenderly white aluminium hydroxide, and moisture content is lower than 0.5%.In crushiing chamber, due to the high speed rotating of airflow function and Disintegrating knife, the piece that scabs in tenderly white aluminium hydroxide is pulverized, and the dispersing property between aluminum hydroxide particles is improved.
(4) the tenderly white aluminium hydroxide after oven dry is packed.
Embodiment 1
Tenderly white aluminium hydroxide test filter cake moisture content 45%, moisture 1% after paddle formula drying machine drying, after turn/min of pulverizer 3500 pulverizes, granularity 1.444 μ m, oil-absorption(number) 28ml/100g.
Embodiment 2
Tenderly white aluminium hydroxide test filter cake moisture content 35%, moisture 1% after oar blade type is dried, after turn/min of pulverizer 2500 pulverizes, granularity d(5,0) 1.522 μ m, oil-absorption(number) 30ml/100g.
Embodiment 3
Tenderly white aluminium hydroxide test filter cake moisture content 50%, moisture 2% after paddle formula is dried, after turn/min of pulverizer 3500 pulverizes, granularity d(5,0) 1.421 μ m, oil-absorption(number) 29ml/100g.
Claims (2)
1. the oven dry breaking method of an aluminium hydroxide, it is characterized in that the drying course of aluminium hydroxide is at 60 DEG C of-90 DEG C of temperature, adopt paddle formula dryer to dry, aluminium hydroxide after oven dry is in pulverizer, be under the rotating blade effect of turn/min of 2500-3500 at rotating speed, soft-agglomerated the scattering between brief summary scar piece and the particle that makes to produce in drying course.
2. the oven dry breaking method of a kind of aluminium hydroxide according to claim 1, is characterized in that aluminium hydroxide is in pulverizer, by the soft-agglomerated loose density 0.35-0.45 g/cm that is dispersed between the brief summary scar piece producing in drying course and particle
3, refitting density 0.6-0.7g/cm
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293673.0A CN104045101A (en) | 2014-06-27 | 2014-06-27 | Drying and smashing method of aluminum hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293673.0A CN104045101A (en) | 2014-06-27 | 2014-06-27 | Drying and smashing method of aluminum hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104045101A true CN104045101A (en) | 2014-09-17 |
Family
ID=51498558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410293673.0A Pending CN104045101A (en) | 2014-06-27 | 2014-06-27 | Drying and smashing method of aluminum hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104045101A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106082294A (en) * | 2016-08-01 | 2016-11-09 | 刘冠华 | Aluminium hydroxide is dried conveyer device and the method for conveying aluminium hydroxide |
| CN107400259A (en) * | 2017-06-08 | 2017-11-28 | 靖江市晨阳化工有限公司 | A kind of method that Physical prepares low-smoke halogen-free polyolefin fire retardant aluminium hydroxide |
| CN113264544A (en) * | 2021-04-26 | 2021-08-17 | 杭州智华杰科技有限公司 | Method for reducing oil absorption value and viscosity of aluminum oxide |
-
2014
- 2014-06-27 CN CN201410293673.0A patent/CN104045101A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 厉衡隆等: "《铝冶炼生产技术手册》", 31 July 2011, article "《铝冶炼生产技术手册》", pages: 852 - 25.2.3.2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106082294A (en) * | 2016-08-01 | 2016-11-09 | 刘冠华 | Aluminium hydroxide is dried conveyer device and the method for conveying aluminium hydroxide |
| CN107400259A (en) * | 2017-06-08 | 2017-11-28 | 靖江市晨阳化工有限公司 | A kind of method that Physical prepares low-smoke halogen-free polyolefin fire retardant aluminium hydroxide |
| CN113264544A (en) * | 2021-04-26 | 2021-08-17 | 杭州智华杰科技有限公司 | Method for reducing oil absorption value and viscosity of aluminum oxide |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |