CN108751239A - Cell grinds levigation method crystal seed and prepares ultrawhite ultrafine aluminium hydroxide method - Google Patents
Cell grinds levigation method crystal seed and prepares ultrawhite ultrafine aluminium hydroxide method Download PDFInfo
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- CN108751239A CN108751239A CN201810668827.8A CN201810668827A CN108751239A CN 108751239 A CN108751239 A CN 108751239A CN 201810668827 A CN201810668827 A CN 201810668827A CN 108751239 A CN108751239 A CN 108751239A
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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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
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Abstract
The invention discloses cell mill levigation method crystal seeds to prepare ultrawhite ultrafine aluminium hydroxide method, this method is to grind crystal seed prepared by levigation method by the way that cell is added into the micro-nano ultrawhite ultrafine aluminium hydroxide raw material sodium aluminate solution of aluminium system, realizes the preparation of micro-nano ultrawhite ultrafine aluminium hydroxide.The principle of the invention is scientific and reasonable, can meet the micro-nano ultrawhite ultrafine aluminium hydroxide production of aluminium system, and production efficiency is high, energy consumption is low, production process is environmentally friendly, comprehensive utilization of resources effect is good, reduces production cost；The obtained micro-nano ultrawhite ultrafine aluminium hydroxide product dispersion degree of aluminium system is higher simultaneously, and crystal structure is preferable, and the quality and granularity of product are higher.
Description
Technical field
The present invention relates to fine chemistry industry field of new materials, especially cell mill levigation method crystal seeds to prepare the ultra-fine hydroxide of ultrawhite
Aluminium method.
Background technology
Aluminium hydroxide basic nature matter：Aluminium hydroxide（Aluminium hydroxide）, chemical formula Al (OH)3, it is aluminium
Hydroxide；Aluminium hydroxide, which can react to generate salt and water but also react with highly basic with acid, generates salt and water, therefore is also one kind
Amphoteric hydroxide；Due to showing certain acidity again, so aluminic acid can be referred to as again（H3AlO3）.But reality is given birth to when being reacted with alkali
At be tetrahydroxy close aluminate（[Al(OH)4]-）.Therefore it is usually being regarded as a hydration meta-aluminic acid（HAlO2•H2O）.
No. CAS：21645-51-2；Molecular formula：Al(OH)3；Aluminium hydroxide molecular weight：78.00360 accurate masses：
77.98980；PSA：60.69000；
Physico-chemical property：Appearance and character：The powder of white amorphous；Density：2.40；Fusing point：300℃；Water-soluble：It is hard to tolerate.
Feature：Ultrawhite ultrafine aluminium hydroxide appearance is white powder, is soluble in highly basic strong acid solution, and 200 DEG C or less steady
It is fixed, start to discharge moisture content more than 200 DEG C；It has fire-retardant, smoke elimination, filling three zones, the non-secondary pollution in burning, pyrolysis
When do not generate toxic and mordant gas and absorb heat and release water vapour, have fire-retardant self-extinguishment, aluminium hydroxide is mesh
One of maximum inorganic combustion inhibitor of dosage on former world, its not only good dispersion in polyolefin, and be easy to and other additives
Matter generates flame retardant synergistic effect, additionally, due to the presence of the crystallization water, so that polymer product is assigned anti-static function, make simultaneously
The properties such as the intensity and toughness of high molecular polymer are improved, and as general flame retardant grade filler, have at low cost, property
Can be high the advantages that.
It produces the crystal seed needed for the micro-nano ultrawhite ultrafine aluminium hydroxide product of aluminium system and generally uses dry method seed, obtained production
Often there is thread bulk in product, and dispersion degree is relatively low, and crystal structure is poor, cause the quality of product and granularity relatively low, and production difficulty is larger,
And crystal seed is caused to waste, production cost is higher；And routinely the micro-nano ultrawhite ultrafine aluminium hydroxide product of production aluminium system is made
Seed size is usually at 3.5 μm or more, and there is also that there are dispersion degrees is relatively low, crystal structure is poor, cause product granularity compared with
It is low, the higher problem of production cost.
Therefore, it is badly in need of a kind of low cost, high yield quality in the micro-nano ultrawhite ultrafine aluminium hydroxide product of aluminium system at present
The micro-nano aluminium hydroxide of aluminium system production Technology.
Invention content
The object of the present invention is to provide cell mill levigation method crystal seeds to prepare ultrawhite ultrafine aluminium hydroxide method.The present invention
Scientific in principle is reasonable, can meet the micro-nano ultrawhite ultrafine aluminium hydroxide production of aluminium system, and production efficiency is high, production energy
It consumes that low, production process is environmentally friendly, comprehensive utilization of resources effect is good, reduces production cost；Obtained aluminium system is micro-nano super simultaneously
White superfine aluminum hydroxide product dispersion degree is higher, and crystal structure is preferable, and the quality and granularity of product are higher.
Technical scheme of the present invention：Cell grinds levigation method crystal seed and prepares ultrawhite ultrafine aluminium hydroxide method, by aluminium system
Crystal seed prepared by cell mill levigation method is added in micro-nano ultrawhite ultrafine aluminium hydroxide raw material sodium aluminate solution, realizes micro-nano super
The preparation of white superfine aluminium hydroxide.
Cell mill levigation method crystal seed above-mentioned is prepared in ultrawhite ultrafine aluminium hydroxide method, and the raw material sodium aluminate solution is
By the way that raw aluminum hydroxide and the molten rear filtering of sodium hydroxide solution weight are refining to obtain.
Cell above-mentioned mill levigation method crystal seed is prepared in ultrawhite ultrafine aluminium hydroxide method, the cell mill levigation method be by
Aluminium hydroxide is with water according to 1：The slurry of 1 ratio mixing is operated by cell mill operating instruction, by the grinding of 3-4h, system
It is standby to obtain the aluminium hydroxide crystal seed slurries that grain size is 1.3-1.5 μm of a concentration of 400-450g/l.
Cell above-mentioned mill levigation method crystal seed is prepared in ultrawhite ultrafine aluminium hydroxide method, and the method is by by raw material
Aluminium hydroxide presses 1-2 with sodium hydroxide solution:10 ratio is added reaction system and heats 100-130 DEG C, filtering after pressurization weight is molten
It is refined, then the aluminium hydroxide crystal seed that grain size prepared by cell mill levigation method is 1.3-1.5 μm of a concentration of 400-450g/l is starched
Liquid addition refine sodium aluminate solution in, decomposing system is added after mixing, by forced circulation mixer be uniformly mixed, into point
Solution slot carries out decomposition of crystal seed and obtains ultrawhite ultrafine aluminium hydroxide, and slurries are washed after crystallizing, after press filtration, filtering solid-liquor separation,
Isolated seed precipitation solution enters evaporator and is evaporated concentration, and dispensing circular regeneration produces the evaporation mother liquor of output again, production
Excess of export white superfine aluminium hydroxide enters flash evaporation drying tower drying, realizes the preparation of micro-nano ultrawhite ultrafine aluminium hydroxide.
Cell mill levigation method crystal seed above-mentioned is prepared in ultrawhite ultrafine aluminium hydroxide method, and the washing is by first separation
The solid of machine separation pours product sink with hot water, reaches the index needed for production by washing, washing lotion recycles；It is described
The solid of solid-liquor separation separation enters in dryer mixing drum, and high-speed rotating centrifugal energy nozzle is pumped into through screw rod, is separated into thin
Small droplet is dried after carrying out heat exchange with hot wind in drying tower.
Cell above-mentioned mill levigation method crystal seed is prepared in ultrawhite ultrafine aluminium hydroxide method, evaporation mother liquor dispensing again
It is addition technical grade aluminium hydroxide and supplement sodium hydroxide into evaporation mother liquor, circulating mother liquor is prepared by heating, then by hydrogen
Aluminium oxide and circulating mother liquor mixing, mixed slurry are pumped into reaction system and heat 100-130 DEG C, and pressurization prepares sodium aluminate solution,
Filtering is refined；After refined, refined liquid discharging is detached, and slag is refined after separation and retains to recycle as next one crystal seed makes
With it is to be crystallized that refined liquid is pumped into crystallizer etc. after heat-exchangers of the plate type carries out heat exchange with water.
Cell mill levigation method crystal seed above-mentioned is prepared in ultrawhite ultrafine aluminium hydroxide method, and the specific steps of the method are such as
Under：
（a）：Raw aluminum hydroxide presses 1-2:After 10 ratio and sodium hydroxide lye dispensing, into reaction kettle；
（b）：Reaction kettle heating carries out reacting dissolution with sodium hydroxide lye；Aluminium hydroxide alkaline hydrolysiss, in alkali sodium hydroxide solution
In thick aluminium hydroxide be added at a temperature of 50~80 DEG C be warming up to 100-130 DEG C, sodium aluminate solution is made in heat preservation；
（c）：For sodium aluminate solution after filter press is refined, refined sodium aluminate solution enters plate heat exchanger cooling after weight is molten；
（d）The separation filter residue of filter press drains into the recycling of slag muck field；
（e）Crystal seeds are prepared using cell mill levigation method mill.
（f）：Sodium aluminate solution after refined is added crystal seed prepared by cell mill levigation method mill, makes crystal seed and sodium aluminate solution
Liquid crystallization, agglomeration, crystal are grown up, crystal is qualitative, complete ultrawhite ultrafine aluminium hydroxide new material product after 8 hours, are stopped point
Solution；
（g）：It decomposes slurry and enters iron remover except iron, circular vibrating screen carry out the big particle of screening filtering, decompose slurry and be sent into filter press
Solid-liquor separation, washing are carried out, product washing is washed for dispensing.
（h）：Aluminium hydroxide after solid-liquor separation, washing, is dried into drying tower, the aluminum hydroxide product after drying
It is packed into vacuum packing machine, send warehouse for finished product；
（i）：The seed precipitation solution part of low concentration send evaporization process to concentrate after separation, and the circulating mother liquor prepared enters subsequent cycle
Continue to dissolve out raw aluminum hydroxide, prepares sodium aluminate solution, refining filtering, board-like cooling, decomposition of crystal seed output wet hydrogen aluminium oxide,
The ultrawhite ultrafine aluminium hydroxide dried and prepared.
It is as follows that cell grinds operating instruction：1, buffer barrel discharge valve is opened；2 pay attention to checking whether pipeline valve blocks, and protect
Demonstrate,prove unimpeded, opening membrane pump feeding valve, discharge valve；3, Vibration on Start-up is sieved；4, start host wind turbine；5, diaphragm pump is being determined
Import and export it is unimpeded in the case of, start diaphragm pump；（Normal production 4.5HZ---5HZ）Start host, is accelerated, in diaphragm pump
It is normal to produce frequency 35HZ---40HZ, solid content 50%, normal current 35A---42A in the case of normal charging 2 minutes.）
Compared with prior art, the present invention by raw aluminum hydroxide and sodium hydroxide solution by pressing 1-2:10 ratio is added anti-
100-130 DEG C of system warm-up is answered, filtering is refined after pressurization weight is molten, and the grain size for then preparing cell mill levigation method is 1.3-1.5 μ
The aluminium hydroxide crystal seed slurries addition of a concentration of 400-450g/l of m refines in sodium aluminate solution, and decomposing system is added after mixing,
It is uniformly mixed by forced circulation mixer, carrying out decomposition of crystal seed into decomposer obtains ultrawhite ultrafine aluminium hydroxide, slurries crystallization
After it is washed, after press filtration, filtering solid-liquor separation, seed precipitation solution enters evaporator and is evaporated concentration, the evaporation mother of output
Again dispensing circular regeneration produces liquid, after output ultrawhite ultrafine aluminium hydroxide enters flash evaporation drying tower drying, you can output high quality
Standard, crystalline structure be reasonable, even-grained ultrawhite ultrafine aluminium hydroxide.
Aluminic acid solution is mainly by NaAl (OH)4, NaOH and Na2CO3Etc. compounds composition, wherein also containing SiO2、Na2SO4、
Na2Impurity existing for the compounds state such as S organic matters and iron content, gallium, vanadium, fluorine, aluminic acid solution physicochemical property and synthesis feature：
Sodium aluminate solution many places are in saturation or hypersaturated state, and in theory, oversaturated solution is unstable, degree of super saturation
Bigger, the stability of solution is also lower, but also there is complicated relationships with many factors for the stability of sodium aluminate solution, often
So that oversaturated sodium aluminate solution is kept opposite stability, i.e., spontaneous solution or decomposition rate does not occur within a certain period of time
It is very small, in the steady state that is situated between；Aluminic acid solution physicochemical property and synthesis feature have to be determined with stability inferior：（1）The causticity of solution
Ratio improves caustic sodium concentration under certain temperature and alumina concentration（Improve ak values）, make the aluminic acid in unsaturation service area
The ingredient of sodium solution increases with isothermal distance, and the unsaturated degree of ie in solution increases, thus the stability of solution improves, institute
To improve sodium aluminate solution caustic ratio at any temperature, the stability of solution can be made to improve, it is demonstrated experimentally that Crater corrosion
Value is decomposed for 1.0 sodium aluminate solution wink；The solution of ak=1.4 ~ 1.8 quite stable under production conditions：Ak=3 or more it is molten
Liquid by will not all decompose for a long time；（2）The temperature of solution, when the caustic ratio and concentration of sodium aluminate solution are all identical
When, the stability of solution declines with the reduction of temperature, molten when temperature is less than 30 DEG C until temperature is reduced to 30 DEG C
Liquid becomes more stable again；（3）The alumina concentration of solution, there is a kind of spies between the alumina concentration and stability of solution
Different relationship, at a certain temperature, the solution under certain caustic ratio, alumina concentration are less than the weak solution or height of 25 grams per liters
All there is very high stability in the concentrated solution of 250 grams per liters, the stability of solution close to weak solution concentration is smaller, and medium dense
The stability smaller of solution is spent,（4）Impurity in solution, the organic matter in solution is acted on caustic soda, generally with sodium salt state
It exists in solution, such as soil acid sodium, sodium humate, sodium oxalate etc..Their presence makes solution viscosity increase, and stability increases
Greatly, and easily it is adsorbed by nucleus, keeps nucleus ineffective, can made being decomposed into for solution impossible when serious, be present in solution
In sodium carbonate, sodium sulphate and vulcanized sodium etc. also increases all to a certain extent the stability of solution, sodium carbonates' presence
The stability of solution is set to improve, the solubility that this can increase aluminium oxide in sodium aluminate solution with sodium carbonate is related；（5）The nuclei of crystallization
The heart adds the Al of particulate into sodium aluminate solution（OH）3 are used as crystallization nuclei, and stability of solution can be made to reduce and decompose and Al is precipitated
（OH）3, red mud particle in solution also plays crystallization nuclei under certain condition and stability of solution is made to reduce；（6）Machinery stirs
It mixes, mechanical agitation energy promotes the diffusion in solution, is conducive to the generation of crystal seed and growing up for crystal, when existing kind in solution
In the presence of son, stirring can also make seed keep suspended state and preferably be contacted with supersaturated solution holding, promote to decompose.
The effect of product prepared by the artificial verification present invention of application, the product prepared to the present invention are detected, as a result
It is as follows：
Detection one：Physico-chemical tests；
Detection method：GB-T6610-2003；
Key instrument equipment：Electronic balance, spectrophotometer, flame photometer, laser particle analyzer；
Testing result；As shown in Figure 2；
Conclusion：The above physics, chemical index comply fully with the product index quality requirement of ultrawhite ultrafine aluminium hydroxide.
Detection two：Grain size analysis
Detection method：GB-T6610-2003；
Key instrument equipment：BT-9300ST type laser fineness gages
Testing result：As shown in Figure 3：
Conclusion：The above particle size data complies fully with the product index quality requirement of ultrawhite ultrafine aluminium hydroxide.
In conclusion the principle of the invention is scientific and reasonable, the micro-nano ultrawhite ultrafine aluminium hydroxide product life of aluminium system can be met
Production, and production efficiency is high, energy consumption is low, production process is environmentally friendly, comprehensive utilization of resources effect is good, reduces production cost；
The obtained micro-nano ultrawhite ultrafine aluminium hydroxide product dispersion degree of aluminium system is higher simultaneously, and crystal structure is preferable, the quality of product
It is higher with granularity.
Description of the drawings
Fig. 1 is the process flow chart of the present invention；
Fig. 2 is product physics and chemistry analytical quality index prepared by the present invention；
Fig. 3 is Granularity Distribution figure prepared by the present invention.
Specific implementation mode
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment.Cell grinds levigation method crystal seed and prepares ultrawhite ultrafine aluminium hydroxide method, as shown in Figure 1, by aluminium system
Crystal seed prepared by cell mill levigation method is added in micro-nano ultrawhite ultrafine aluminium hydroxide raw material sodium aluminate solution, realizes micro-nano super
The preparation of white superfine aluminium hydroxide.
The raw material sodium aluminate solution is by the way that raw aluminum hydroxide and the molten rear filtering of sodium hydroxide solution weight to be refining to obtain
It arrives；The cell mill levigation method is by aluminium hydroxide and water according to 1：The slurry of 1 ratio mixing is carried out by cell mill operating instruction
The aluminium hydroxide crystal seed slurry that grain size is 1.3-1.5 μm of a concentration of 400-450g/l is prepared by the grinding of 3-4h in operation
Liquid.
The method be by by raw aluminum hydroxide and sodium hydroxide solution by 1-2:Reaction system is added in 10 ratio
100-130 DEG C of heating, filtering is refined after pressurization weight is molten, and the grain size for then preparing cell mill levigation method is 1.3-1.5 μm of concentration
It is refined in sodium aluminate solution for the aluminium hydroxide crystal seed slurries addition of 400-450g/l, decomposing system is added after mixing, is passing through
Forced circulation mixer is uniformly mixed, and carrying out decomposition of crystal seed into decomposer obtains ultrawhite ultrafine aluminium hydroxide, and slurries terminate
By washing, after press filtration, filtering solid-liquor separation, isolated seed precipitation solution enters evaporator and is evaporated concentration, output
Evaporating mother liquor, dispensing circular regeneration produces again, and output ultrawhite ultrafine aluminium hydroxide enters flash evaporation drying tower drying, realizes micro-nano
The preparation of ultrawhite ultrafine aluminium hydroxide；The washing is that the solid that first separation machine detaches is poured product sink with hot water,
Reach the index needed for production by washing, washing lotion recycles；The solid of the solid-liquor separation separation enters dryer stirring
In cylinder, it is pumped into high-speed rotating centrifugal energy nozzle through screw rod, is separated into fine mist, heat exchange is carried out with hot wind in drying tower
It is dried afterwards；Again dispensing is addition technical grade aluminium hydroxide and supplement sodium hydroxide into evaporation mother liquor to the evaporation mother liquor,
It is prepared into circulating mother liquor by heating, then aluminium hydroxide and circulating mother liquor are mixed, mixed slurry is pumped into reaction system heating
100-130 DEG C, pressurization prepares sodium aluminate solution, and filtering is refined；After refined, refined liquid discharging is detached, smart after separation
Slag processed is retained as next one crystal seed and is recycled, and refined liquid is pumped into crystallization after heat-exchangers of the plate type and water carry out heat exchange
Device etc. is to be crystallized.
The above method is as follows：
（a）：Raw aluminum hydroxide presses 1.5:After 10 ratio and sodium hydroxide lye dispensing, into reaction kettle；
（b）：Reaction kettle heating carries out reacting dissolution with sodium hydroxide lye；Aluminium hydroxide alkaline hydrolysiss, in alkali sodium hydroxide solution
In thick aluminium hydroxide be added at a temperature of 70 DEG C be warming up to 115 DEG C, sodium aluminate solution is made in heat preservation；
（c）：For sodium aluminate solution after filter press is refined, refined sodium aluminate solution enters plate heat exchanger cooling after weight is molten；
（d）The separation filter residue of filter press drains into the recycling of slag muck field；
（e）Crystal seeds are prepared using cell mill levigation method mill.
（f）：Sodium aluminate solution after refined is added crystal seed prepared by cell mill levigation method mill, makes crystal seed and sodium aluminate solution
Liquid crystallization, agglomeration, crystal are grown up, crystal is qualitative, complete ultrawhite ultrafine aluminium hydroxide new material product after 8 hours, are stopped point
Solution；
（g）：It decomposes slurry and enters iron remover except iron, circular vibrating screen carry out the big particle of screening filtering, decompose slurry and be sent into filter press
Solid-liquor separation, washing are carried out, product washing is washed for dispensing.
（h）：Aluminium hydroxide after solid-liquor separation, washing, is dried into drying tower, the aluminum hydroxide product after drying
It is packed into vacuum packing machine, send warehouse for finished product；
（i）：The seed precipitation solution part of low concentration send evaporization process to concentrate after separation, and the circulating mother liquor prepared enters subsequent cycle
Continue to dissolve out raw aluminum hydroxide, prepares sodium aluminate solution, refining filtering, board-like cooling, decomposition of crystal seed output wet hydrogen aluminium oxide,
The ultrawhite ultrafine aluminium hydroxide dried and prepared.
The cell mill levigation method operating instruction is as follows：1, buffer barrel discharge valve is opened；2 pay attention to checking that pipeline valve is
No blocking ensures unimpeded）Open membrane pump feeding valve, discharge valve；3, Vibration on Start-up is sieved；4, start host wind turbine；5, exist
In the case of determining that diaphragm pump inlet and outlet are unimpeded, start diaphragm pump；（Normal production 5HZ）Start host, is accelerated, in diaphragm
It is normal to produce frequency 340HZ, solid content 50%, normal current 40A in the case of the normal charging of pump 2 minutes.）
Claims (7)
1. cell grinds levigation method crystal seed and prepares ultrawhite ultrafine aluminium hydroxide method, it is characterised in that：By micro-nano super to aluminium system
Crystal seed prepared by cell mill levigation method is added in white superfine aluminium hydroxide raw material sodium aluminate solution, realizes the ultra-fine hydrogen of micro-nano ultrawhite
The preparation of aluminium oxide.
2. cell mill levigation method crystal seed according to claim 1 prepares ultrawhite ultrafine aluminium hydroxide method, it is characterised in that：
The raw material sodium aluminate solution is by the way that raw aluminum hydroxide and the molten rear filtering of sodium hydroxide solution weight to be refining to obtain.
3. cell mill levigation method crystal seed according to claim 1 prepares ultrawhite ultrafine aluminium hydroxide method, it is characterised in that：
The cell mill levigation method is by aluminium hydroxide and water according to 1：The slurry of 1 ratio mixing is grasped by cell mill operating instruction
Make, by the grinding of 3-4h, the aluminium hydroxide crystal seed slurries that grain size is 1.3-1.5 μm of a concentration of 400-450g/l are prepared.
4. cell mill levigation method crystal seed according to claim 1 prepares ultrawhite ultrafine aluminium hydroxide method, it is characterised in that：
The method be by by raw aluminum hydroxide and sodium hydroxide solution by 1-2:10 ratio is added reaction system and heats 100-
130 DEG C, filtering is refined after pressurization weight is molten, and the grain size for then preparing cell mill levigation method is 1.3-1.5 μm of a concentration of 400-
The aluminium hydroxide crystal seed slurries addition of 450g/l refines in sodium aluminate solution, and decomposing system is added after mixing, is followed by pressure
Ring mixer is uniformly mixed, and carrying out decomposition of crystal seed into decomposer obtains ultrawhite ultrafine aluminium hydroxide, slurries terminate after through washing
It washs, after press filtration, filtering solid-liquor separation, isolated seed precipitation solution enters evaporator and is evaporated concentration, and the evaporation of output is female
Again dispensing circular regeneration produces liquid, and output ultrawhite ultrafine aluminium hydroxide enters flash evaporation drying tower drying, realizes that micro-nano ultrawhite is super
The preparation of thin aluminium hydroxide.
5. cell mill levigation method crystal seed according to claim 4 prepares ultrawhite ultrafine aluminium hydroxide method, it is characterised in that：
The washing is that the solid that first separation machine detaches is poured product sink with hot water, reaches the finger needed for production by washing
Mark, washing lotion recycle；The solid of the solid-liquor separation separation enters in dryer mixing drum, and high speed rotation is pumped into through screw rod
Centrifugal energy nozzle, be separated into fine mist, in drying tower with hot wind carry out heat exchange after dried.
6. cell mill levigation method crystal seed according to claim 4 prepares ultrawhite ultrafine aluminium hydroxide method, it is characterised in that：
Again dispensing is addition technical grade aluminium hydroxide and supplement sodium hydroxide into evaporation mother liquor to the evaporation mother liquor, is made by heating
Standby to be mixed at circulating mother liquor, then by aluminium hydroxide and circulating mother liquor, mixed slurry is pumped into reaction system and heats 100-130 DEG C,
Pressurization prepares sodium aluminate solution, and filtering is refined；After refined, refined liquid discharging is detached, and is refined after separation under slag conduct
One round crystal seed, which is retained, to be recycled, and refined liquid is pumped into crystallizer waiting after heat-exchangers of the plate type and water carry out heat exchange and ties
It is brilliant.
7. cell mill levigation method crystal seed according to claim 1 prepares ultrawhite ultrafine aluminium hydroxide method, it is characterised in that：
The method is as follows：
（a）：Raw aluminum hydroxide presses 1-2:After 10 ratio and sodium hydroxide lye dispensing, into reaction kettle；
（b）：Reaction kettle heating carries out reacting dissolution with sodium hydroxide lye；Aluminium hydroxide alkaline hydrolysiss, in alkali sodium hydroxide solution
In thick aluminium hydroxide be added at a temperature of 50~80 DEG C be warming up to 100-130 DEG C, sodium aluminate solution is made in heat preservation；
（c）：For sodium aluminate solution after filter press is refined, refined sodium aluminate solution enters plate heat exchanger cooling after weight is molten；
（d）The separation filter residue of filter press drains into the recycling of slag muck field；
（e）Crystal seeds are prepared using cell mill levigation method mill.
（f）：Sodium aluminate solution after refined is added crystal seed prepared by cell mill levigation method mill, makes crystal seed and sodium aluminate solution knot
Crystalline substance, agglomeration, crystal are grown up, crystal is qualitative, complete ultrawhite ultrafine aluminium hydroxide new material product after 8 hours, stop decomposing；
（g）：It decomposes slurry and enters iron remover except iron, circular vibrating screen carry out the big particle of screening filtering, decompose slurry and be sent into filter press
Solid-liquor separation, washing are carried out, product washing is washed for dispensing.
（h）：Aluminium hydroxide after solid-liquor separation, washing, is dried into drying tower, and the aluminum hydroxide product after drying enters
Vacuum packing machine is packed, and warehouse for finished product is sent；
（i）：The seed precipitation solution part of low concentration send evaporization process to concentrate after separation, and the circulating mother liquor prepared enters subsequent cycle
Continue to dissolve out raw aluminum hydroxide, prepares sodium aluminate solution, refining filtering, board-like cooling, decomposition of crystal seed output wet hydrogen aluminium oxide,
The ultrawhite ultrafine aluminium hydroxide dried and prepared.
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| CN109437269A (en) * | 2018-12-10 | 2019-03-08 | 贵州博汇联润铝业有限公司 | It is a kind of to improve ultra-fine ultrawhite aluminum hydroxide micro mist comprehensive performance method |
| CN109437267A (en) * | 2018-12-03 | 2019-03-08 | 广西华银铝业有限公司 | A kind of decomposition method of Bayer process sodium aluminate solution |
| CN109437268A (en) * | 2018-12-10 | 2019-03-08 | 贵州博汇联润铝业有限公司 | A kind of ultra-fine ultrawhite aluminum hydroxide micro mist activity ameliorative way |
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| CN109626406A (en) * | 2018-12-10 | 2019-04-16 | 贵州博汇联润铝业有限公司 | A kind of ultra-fine ultrawhite aluminum hydroxide micro mist preparation method |
| CN109809453A (en) * | 2019-03-07 | 2019-05-28 | 洛阳中超新材料股份有限公司 | Ultrafine aluminium hydroxide and its preparation method and application |
| CN110357134A (en) * | 2019-08-16 | 2019-10-22 | 山东省化工研究院 | A kind of aluminium hydroxide synthesis process size controlling method |
| CN112225237A (en) * | 2020-10-26 | 2021-01-15 | 洛阳莱茵希德特种材料有限公司 | Preparation method of superfine aluminum hydroxide |
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| CN109437269B (en) * | 2018-12-10 | 2021-02-19 | 贵州博汇联润铝业有限公司 | Method for improving comprehensive performance of superfine ultra-white aluminum hydroxide micro powder |
| CN109399677B (en) * | 2018-12-10 | 2021-04-13 | 贵州博汇联润铝业有限公司 | Method for preparing aluminum hydroxide by using aluminum rock as raw material cell grinding and water milling seed crystal |
| CN109437268A (en) * | 2018-12-10 | 2019-03-08 | 贵州博汇联润铝业有限公司 | A kind of ultra-fine ultrawhite aluminum hydroxide micro mist activity ameliorative way |
| CN109502615A (en) * | 2018-12-10 | 2019-03-22 | 贵州博汇联润铝业有限公司 | A kind of ultra-fine heat-resisting method of ultrawhite aluminum hydroxide micro mist of enhancing |
| CN109626406A (en) * | 2018-12-10 | 2019-04-16 | 贵州博汇联润铝业有限公司 | A kind of ultra-fine ultrawhite aluminum hydroxide micro mist preparation method |
| CN109437269A (en) * | 2018-12-10 | 2019-03-08 | 贵州博汇联润铝业有限公司 | It is a kind of to improve ultra-fine ultrawhite aluminum hydroxide micro mist comprehensive performance method |
| CN109399677A (en) * | 2018-12-10 | 2019-03-01 | 贵州博汇联润铝业有限公司 | One kind grinding water mill crystal seed as raw cell using pelite and prepares aluminium hydroxide method |
| CN109626406B (en) * | 2018-12-10 | 2021-03-16 | 贵州博汇联润铝业有限公司 | Preparation method of superfine ultra-white aluminum hydroxide micro powder |
| CN109809453A (en) * | 2019-03-07 | 2019-05-28 | 洛阳中超新材料股份有限公司 | Ultrafine aluminium hydroxide and its preparation method and application |
| CN110357134A (en) * | 2019-08-16 | 2019-10-22 | 山东省化工研究院 | A kind of aluminium hydroxide synthesis process size controlling method |
| CN110357134B (en) * | 2019-08-16 | 2021-08-06 | 山东省化工研究院 | Particle size control method in aluminum hydroxide synthesis process |
| CN112225237A (en) * | 2020-10-26 | 2021-01-15 | 洛阳莱茵希德特种材料有限公司 | Preparation method of superfine aluminum hydroxide |
| CN112499654A (en) * | 2020-12-03 | 2021-03-16 | 山东林嘉新材料科技有限公司 | Processing technology of aluminum hydroxide |
| CN116143152A (en) * | 2022-12-23 | 2023-05-23 | 清远市普塞呋磷化学有限公司 | Superfine aluminum hydroxide and preparation method and application thereof |
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