CN106747301A - A kind of method that smelting aluminum ash prepares Brown Alundum - Google Patents
A kind of method that smelting aluminum ash prepares Brown Alundum Download PDFInfo
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- CN106747301A CN106747301A CN201611069609.XA CN201611069609A CN106747301A CN 106747301 A CN106747301 A CN 106747301A CN 201611069609 A CN201611069609 A CN 201611069609A CN 106747301 A CN106747301 A CN 106747301A
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Abstract
A kind of method that smelting aluminum ash prepares Brown Alundum, acidification and basification are carried out successively to aluminium ash first, the aluminium ash that then separation of solid and liquid is obtained is dried dehydration and high-temperature calcination successively, it is sintered after mixing with iron filings, coke after its cooling, so as to obtain Brown Alundum product, during the melting, aluminium ash, iron filings and coke after calcining compare 100 according to weight:3‑4:Then 8 13 ratio mixing, the 3h of melting 2 under 2,300 2700 DEG C of high temperature cools down broken classification and Brown Alundum product is obtained.The present invention realizes harmless treatment and the recycling of aluminium ash, solves the problems, such as the alumine resource exhaustion for Brown Alundum raw materials for production, reduces the production cost of Brown Alundum.
Description
Technical field
Field is utilized the present invention relates to solid waste resource recovery in metallurgical industry, specifically a kind of smelting aluminum ash
The method for preparing Brown Alundum.
Background technology
Brown Alundum is with bauxite, coke（Anthracite）It is primary raw material, is formed through pyrolytic semlting in electric arc furnaces brown
Color Alundum, is also called diamond dust.Mainly contain 95.0%~97.0% Al2O3, remaining is a small amount of Fe2O3、SiO2、TiO2
Deng.Brown Alundum has purity high, advantages of good crystallization, and mobility is strong, and linear expansion coefficient is low, and corrosion resistant feature, application field is very wide
It is general.The exhaustion of primary raw material high-grade bauxite resource is produced with Brown Alundum, the bauxite for producing Brown Alundum is sampled and got over
Come lower, it has also become the main factor of restriction Brown Alundum industry development, so finding the replacement of production Brown Alundum bauxite
Resource turns into the key issue that scientific research personnel is badly in need of solving.
Aluminium ash is the slag of generation in the production processes such as electrolytic aluminium, metal aluminum alloy casting, metal alum recovery.Mainly contain
Al2O3、SiO2、CaO、Fe2O3, MgO and simple substance Al and some nitride and chloride.The aluminium ash up to 112 of China's production every year
Ten thousand~1,800,000 t.Aluminium ash is as a kind of renewable resource mainly for the production of aluminum sulfate, Brown Alundum, synthesized polymer aluminium chloride, conjunction
Into aluminium oxide used in printing ink and as technical fields such as Load materials.For at present with disclosed Patents, aluminium is such as utilized
The method of ash production Brown Alundum（200610148219.1）, production Brown Alundum with aluminium ash handling process
（201310205937.8）, it is a kind of for corundum production aluminium ash treatment system（201510123613.9）, use aluminium ash low temperature
The method for smelting production Brown Alundum（201310205936.3）Deng Patents.Be primarily present complex process, energy consumption it is high,
Product physical and chemical index is unqualified, secondary pollution problems.Therefore a kind of process is simple is developed, energy consumption is low, non-secondary pollution aluminium
Grey resource reutilization technology treatment technology, while solving the problems, such as that aluminium ash deposits the environmental pollution and land seizure that cause,
Brown Alundum production alumine shortage of resources is solved the problems, such as again, with economic benefit and social benefit very high.
The content of the invention
For the complex process that solves to exist during existing utilization aluminium ash production Brown Alundum, high energy consumption, product physical and chemical index do not conform to
Lattice, secondary pollution problems, the invention provides a kind of method that smelting aluminum ash prepares Brown Alundum, the method has technique letter
Singly, process control condition is gentle, production efficiency of equipment is high, equipment investment is small, realizes consecutive production, realizes the nothing of aluminium ash
Evilization treatment and recycling, solve the problems, such as the alumine resource exhaustion for Brown Alundum raw materials for production, reduce
The production cost of Brown Alundum.
The present invention for the technical scheme that is used of solution above-mentioned technical problem for：A kind of smelting aluminum ash prepares the side of Brown Alundum
Method, carries out acidification and basification successively to aluminium ash first, and the aluminium ash that then separation of solid and liquid is obtained is dried de- successively
Water and high-temperature calcination, melting is carried out after mixing with iron filings, coke after its cooling, so as to obtain Brown Alundum product, during the melting,
Aluminium ash, iron filings and coke after calcining compare 100 according to weight:3-4:The ratio mixing of 8-13, melts under the conditions of 2300-2700 DEG C
Refining refining 2-3h, then cooling, broken, classification is obtained Brown Alundum product.
During the basification, the auxiliary agent of aluminium ash gross weight 0.02-0.05%, the auxiliary agent is added to include in aluminium mortar
EDTA, dodecane alkyl polyglucosides, dodecyl dihydroxy ethyl glycine betaine, neopelex, diisopropyl sodium naphthalene sulfonate,
At least one of polyacrylamide and N- lauroyl glutamate dibutylamides material.
The auxiliary agent is EDTA, dodecane alkyl polyglucosides, neopelex, diisopropyl sodium naphthalene sulfonate, poly- third
At least one of acrylamide, N- lauroyl glutamate dibutylamides are with dodecyl dihydroxy ethyl glycine betaine by weight
500-850:1 ratio is mixed to get.
Also contain the Reactive alumina and Reactive alumina weight 100- that particle diameter is 3-20nm in the auxiliary agent
500% propionic aldehyde, and the amount of Reactive alumina is the 0.01-0.05% of aluminium ash gross weight.
Aluminium ash and water are first 0.5-2 according to weight ratio before carrying out acidification by the aluminium ash:1 ratio is well mixed
It is made aluminium mortar.
The acidification is that acid is added in aluminium mortar, is 3.5-5 with the pH value for controlling aluminium mortar, and be in temperature
0.5-2.5h is reacted under 45-90 DEG C of stirring condition.
Described acid is technical-grade hydrochloric acid, nitric acid, one or more composition of sulfuric acid.
The basification is to add alkali in slurry after acidified treatment, is 6.5-8 to control its pH value, and in temperature
Spend under the stirring condition for 25-40 DEG C and react 2-4h.
The alkali is one or more the composition in technical grade ammoniacal liquor, NaOH and potassium hydroxide.
The filtrate obtained after the separation of solid and liquid is used to prepare aluminium mortar；The aluminium ash that separation of solid and liquid is obtained is successively in 120-
Dehydration at a temperature of 300 DEG C, 0.5-2.0h is calcined under conditions of 1150-1300 DEG C, then with the cooling speed of 300-400 DEG C/min
Rate rapidly cooling treatment, mixes with iron filings, coke high melt 2-3 hours under the conditions of carrying out 2300-2700 DEG C, through cold again afterwards
But, crush, classification can be prepared by Brown Alundum product.
In the present invention, the reactor that acidification and basification are selected is universal slot type and tank reactor, calcining
Aluminium ash afterwards is carried out with iron filings, coke mixed smelting in three-phawse arc furnace.Separation of solid and liquid after the treatment of aluminium mortar sets
Standby is single-stage or multi-stage motor centrifugal separator, bag type vacuum filter, disk vacuum filter.Drying and dehydrating device is single-stage
Or multistage cylinder drying machine, mechanical agitation type drying machine, rotary shelf drier, pneumatic convey drier, vibrating drier with
And microwave dryer.High-temperature calcination equipment is gas suspending calcining furnace.
Beneficial effect：The present invention compared with prior art, with advantages below：
1）The present invention realizes harmless treatment and the recycling of aluminium ash, solves the high alumina for Brown Alundum raw materials for production
The problem of alumina resource exhaustion, reduces the production cost of Brown Alundum；
2）The present invention, using the technological means of the addition auxiliary agent in alkalinization, improves and improves Al when aluminium ash is pre-processed
(OH)3The active constituent content and strainability of crystal；The addition auxiliary agent such as EDTA make it with reactant system in Fe3+、Mg2+、Ca2 +There is complex reaction formation water soluble complex Deng impurity, reduce Al (OH)3The content of foreign metal ion in crystal；Addition table
Face activating agent, adjustment Al (OH)3The surface tension of solid-liquid interface between crystal and the aqueous solution, control Al (OH)3The growth of crystal
Speed, improves and improves the size distribution and granule-morphology of material；
3）The present invention is using EDTA, dodecane alkyl polyglucosides, neopelex, diisopropyl sodium naphthalene sulfonate, polypropylene
At least one of acid amides, N- lauroyl glutamate dibutylamides are with dodecyl dihydroxy ethyl glycine betaine by weight 500-
850:1 ratio is mixed to get auxiliary agent, and the sulfobetaines contained in auxiliary agent can make in the sour environment for adding the system initial stage
EDTA and polyacrylamide are preferably dispersed in reaction system, so as to the complexing for contributing to metal ion is removed；In reactant
Be the later stage alkaline environment in, sulfobetaines can and other surfaces activating agent preferably adjust Al (OH)3Crystal and the aqueous solution
Between solid-liquid interface surface tension, so as to control Al (OH)3The growth rate of crystal, improves and improves Al (OH)3Crystal
Granularity and granule-morphology, so as to improve Al (OH)3The strainability of crystal, reduces its moisture content and energy consumption for drying；
4）The present invention adds propionic aldehyde and Reactive alumina by extra in auxiliary agent, can further improve Al2O3Knot
Brilliant environment, increases substantially Al2O3The granularity and product strainability of crystal；
5）The present invention control acidifying and basification reaction temperature and pH value, from efficient drying and roasting apparatus, carry
The production capacity of production efficiency and FU dischargeable capacity high, reduces equipment investment and production cost；
6）Process is simple, process control condition are gentle, production efficiency of equipment is high, equipment investment to aluminium grey anticipating for the present invention
It is small, realize Al in the aluminium ash after consecutive production, and treatment2O3Content is high, and processing cost is low, is realized in processing procedure
Recycling for filtrate, does not cause secondary pollution.
Brief description of the drawings
Fig. 1 is the result of contrast test in the specific embodiment of the invention.
Specific embodiment
With reference to specific embodiment, the present invention is further elaborated.
Embodiment 1
A kind of method that smelting aluminum ash prepares Brown Alundum, is 0.5 according to weight ratio first by aluminium ash and water:1 ratio mixing is equal
It is even to be made aluminium mortar, acidification and basification are then carried out successively to aluminium mortar, then carry out separation of solid and liquid, separation of solid and liquid
The filtrate for obtaining afterwards is used to prepare aluminium mortar, aluminium that separation of solid and liquid is obtained ash successively at a temperature of 300 DEG C dehydration, 1150 DEG C
Under the conditions of high-temperature calcination 2.0h, then rapidly cooled down with the rate of temperature fall of 300 DEG C/min, with iron filings, Jiao after it is cooled down completely
Charcoal mixing carries out melting, and so as to obtain Brown Alundum product, during melting, the aluminium ash, iron filings and coke after calcining are according to weight ratio
100:3:8 ratio mixing, in 2300 DEG C of high melt 2h, then cooling is obtained Brown Alundum product；
The acidification is that acid is added in aluminium mortar, is 5 with the pH value for controlling aluminium mortar, and in the stirring that temperature is 90 DEG C
Under the conditions of react 0.5h, the basification is to add alkali in aluminium mortar, is 8 with the pH value for controlling aluminium mortar, and in temperature
To react 2h under 40 DEG C of stirring conditions, in basification, to the auxiliary agent that aluminium ash gross weight 0.02% is added in aluminium mortar, should
Auxiliary agent is EDTA and dodecyl dihydroxy ethyl glycine betaine mass ratio is 500:1 mixed aid.
During acid used is technical grade sulfuric acid, and acidification in the present embodiment, the material volume of holding is accounted in treatment vessel
The 0.6 of dischargeable capacity；
Alkali used is NaOH, and NaOH is added in form of an aqueous solutions when adding, and the concentration of sodium hydroxide solution is
40%。
Al in the present embodiment gained Brown Alundum product2O3Content is 94.16%, and product recovery rate is 92.41%.
Embodiment 2
A kind of method that smelting aluminum ash prepares Brown Alundum, is 2 according to weight ratio first by aluminium ash and water:1 ratio is well mixed
Aluminium mortar is made, acidification and basification are then carried out successively to aluminium mortar, separation of solid and liquid is then carried out, after separation of solid and liquid
The filtrate for obtaining is used to prepare aluminium mortar, and the aluminium ash that separation of solid and liquid is obtained is dehydrated at a temperature of 120 DEG C successively, 1300 DEG C of bar
High-temperature calcination 0.5h under part, is then rapidly cooled down with the rate of temperature fall of 400 DEG C/min, with iron filings, coke after it is cooled down completely
Mixing carries out melting, and so as to obtain Brown Alundum product, during melting, aluminium ash, iron filings and coke after calcining compare 100 according to weight:
4:13 ratio mixing, in 2700 DEG C of high melt 3h, then cooling is obtained Brown Alundum product；
The acidification is that acid is added in aluminium mortar, is 3.5 with the pH value for controlling aluminium mortar, and is 45 DEG C in temperature and stirs
2.5h is reacted under the conditions of mixing, the basification is to add alkali in aluminium mortar, is 6.5 with the pH value for controlling aluminium mortar, and
Temperature is to react 4h under 25 DEG C of stirring condition, in basification, to adding helping for aluminium ash gross weight 0.05% in aluminium mortar
Agent, the auxiliary agent is that polyacrylamide, neopelex and dodecyl dihydroxy ethyl glycine betaine mass ratio are 400:
300:1 mixed aid.
Acid used is technical-grade hydrochloric acid in the present embodiment；
Alkali used is potassium hydroxide, and potassium hydroxide is added in form of an aqueous solutions when adding, and the concentration of potassium hydroxide solution is
20%。
Al in the present embodiment gained Brown Alundum product2O3Content is 95.21%, and product recovery rate is 85.9%.
Embodiment 3
A kind of method that smelting aluminum ash prepares Brown Alundum, is 1 according to weight ratio first by aluminium ash and water:1 ratio is well mixed
Aluminium mortar is made, acidification and basification are then carried out successively to aluminium mortar, separation of solid and liquid is then carried out, after separation of solid and liquid
The filtrate for obtaining is used to prepare aluminium mortar, and the aluminium ash that separation of solid and liquid is obtained is dehydrated at a temperature of 210 DEG C successively, 1220 DEG C of bar
High-temperature calcination 1.5h under part, is then rapidly cooled down with the rate of temperature fall of 350 DEG C/min, with iron filings, coke after it is cooled down completely
Mixing carries out melting, and so as to obtain Brown Alundum product, during melting, aluminium ash, iron filings and coke after calcining compare 100 according to weight:
3.5:10.5 ratio mixing, in 2500 DEG C of high melt 2.5h, then cooling is obtained Brown Alundum product；
The acidification is that acid is added in aluminium mortar, is 4.2 with the pH value for controlling aluminium mortar, and is 70 DEG C in temperature and stirs
1.2h is reacted under the conditions of mixing, the basification is to add alkali in aluminium mortar, is 7.3 with the pH value for controlling aluminium mortar, and
Temperature is to react 3h under 32 DEG C of stirring condition, in basification, to adding helping for aluminium ash gross weight 0.035% in aluminium mortar
Agent, the auxiliary agent is dodecane alkyl polyglucosides, diisopropyl sodium naphthalene sulfonate, N- lauroyl glutamates dibutylamide and dodecane
Base dihydroxy ethyl glycine betaine mass ratio is 400:200:200:1 mixed aid.
Acid used is technical grade nitric acid in the present embodiment；
Alkali used is technical grade ammoniacal liquor.
Al in the present embodiment gained Brown Alundum product2O3Content is 97.47%, and product recovery rate is 90.8%.
Embodiment 4
The embodiment is identical with the technique of embodiment 1, but is also containing particle diameter in the auxiliary agent added in basification
The Reactive alumina of 3-20nm and the propionic aldehyde of Reactive alumina weight 100%, and the amount of Reactive alumina is aluminium
The 0.01% of grey gross weight.
Al in the present embodiment gained Brown Alundum product2O3Content is 94.64%, and product recovery rate is 92.82%.
Embodiment 5
The embodiment is identical with the technique of embodiment 2, but is also containing particle diameter in the auxiliary agent added in basification
The Reactive alumina of 3-20nm and the propionic aldehyde of Reactive alumina weight 500%, and the amount of Reactive alumina is aluminium
The 0.05% of grey gross weight.
Al in the present embodiment gained Brown Alundum product2O3Content is 95.24%, and product recovery rate is 86.2%.
Embodiment 6
The embodiment is identical with the technique of embodiment 3, but is also containing particle diameter in the auxiliary agent added in basification
The Reactive alumina of 3-20nm and the propionic aldehyde of Reactive alumina weight 300%, and the amount of Reactive alumina is aluminium
The 0.03% of grey gross weight.
Al in the present embodiment gained Brown Alundum product2O3Content is 97.48%, and product recovery rate is 91.3%.
Contrast test
In order to verify raising of the method for the present invention to quality after aluminium ash treatment, spy carries out following contrast test, and to treatment after
The content of each composition is measured in aluminium ash；
Choosing three groups of aluminium ashes carries out contrast test, one of which is acidified in strict accordance with the process conditions of embodiment 3 to aluminium ash,
Alkalization, dehydration and high-temperature calcination and melting treatment, obtain Brown Alundum product I after cooling, another group still with the technique of embodiment 3
Condition is acidified to aluminium ash, is alkalized, being dehydrated and high-temperature calcination and melting treatment, but is not added in basification and helped
Agent, finally cooling obtains Brown Alundum product II, last group is acidified in strict accordance with the process conditions of embodiment 6 to aluminium ash,
Alkalization, dehydration and high-temperature calcination and melting treatment, obtain Brown Alundum product III after cooling, product I, product II and product III are entered
Row constituent analysis, its result is as shown in Figure 1.
From the analysis result of accompanying drawing 1, auxiliary agent is added in basification, aluminum oxide in product can be effectively improved
Content and the rate of recovery, and it is extra in auxiliary agent add Reactive alumina and propionic aldehyde, in can further improving product
The content and the rate of recovery of aluminum oxide.
Claims (10)
1. a kind of method that smelting aluminum ash prepares Brown Alundum, carries out acidification and basification, then successively to aluminium ash first
The aluminium ash that separation of solid and liquid is obtained is dried dehydration and high-temperature calcination successively, is melted after mixing with iron filings, coke after its cooling
Refining, so as to obtain Brown Alundum product, it is characterised in that：During the melting, the aluminium ash, iron filings and coke after calcining are according to weight ratio
100:3-4:Then the ratio mixing of 8-13, the high melt 2-3h under the conditions of 2300-2700 DEG C cools down, crushes, being classified and make
Obtain Brown Alundum product.
2. the method that a kind of smelting aluminum ash according to claim 1 prepares Brown Alundum, it is characterised in that：The basification
When, add the auxiliary agent of aluminium ash gross weight 0.02-0.05%, the auxiliary agent to include EDTA, dodecane alkyl polyglucosides, ten in aluminium mortar
Dialkyl group dihydroxy ethyl glycine betaine, neopelex, diisopropyl sodium naphthalene sulfonate, polyacrylamide and N- lauroyls
At least one of glutamic acid dibutyl amide material.
3. the method that a kind of smelting aluminum ash according to claim 2 prepares Brown Alundum, it is characterised in that：The auxiliary agent is
EDTA, dodecane alkyl polyglucosides, neopelex, diisopropyl sodium naphthalene sulfonate, polyacrylamide, N- lauroyl paddy
At least one of propylhomoserin dibutylamide is with dodecyl dihydroxy ethyl glycine betaine by weight 500-850:1 ratio mixes
Arrive.
4. the method that a kind of smelting aluminum ash according to claim 3 prepares Brown Alundum, it is characterised in that：In the auxiliary agent also
Contain Reactive alumina and the propionic aldehyde of Reactive alumina weight 100-500% that particle diameter is 3-20nm, and active oxidation
The amount of aluminium micro mist is the 0.01-0.05% of aluminium ash gross weight.
5. the method that a kind of smelting aluminum ash according to claim 1 prepares Brown Alundum, it is characterised in that：The aluminium ash is carried out
Before acidification first by aluminium ash with water according to weight ratio be 0.5-2:1 ratio is well mixed to be made aluminium mortar.
6. the method that a kind of smelting aluminum ash according to claim 5 prepares Brown Alundum, it is characterised in that：The acidification
It is that acid is added in aluminium mortar, is 3.5-5 with the pH value for controlling aluminium mortar, and it is anti-in the case where temperature is for 45-90 DEG C of stirring condition
Answer 0.5-2.5h.
7. the method that a kind of smelting aluminum ash according to claim 6 prepares Brown Alundum, it is characterised in that：Described acid is work
Industry grade hydrochloric acid, nitric acid, one or more composition of sulfuric acid.
8. the method that a kind of smelting aluminum ash according to claim 1 prepares Brown Alundum, it is characterised in that：The basification
It is to add alkali in the slurry after acidified treatment, is 6.5-8 to control its pH value, and is 25-40 DEG C of stirring bar in temperature
2-4h is reacted under part.
9. the method that a kind of smelting aluminum ash according to claim 8 prepares Brown Alundum, it is characterised in that：The alkali is industry
One or more composition in level ammoniacal liquor, NaOH and potassium hydroxide.
10. the method that a kind of smelting aluminum ash according to claim 1 prepares Brown Alundum, it is characterised in that：The solid-liquid point
The filtrate obtained after is used to prepare aluminium mortar；Aluminium that separation of solid and liquid is obtained ash successively at a temperature of 120-300 DEG C dehydration,
0.5-2.0h is calcined under conditions of 1150-1300 DEG C, then with the rate of temperature fall of 300-400 DEG C/min rapidly cooling treatment, it
Mix with iron filings, coke again afterwards high melt 2-3 hours under the conditions of carrying out 2300-2700 DEG C, through cooling, broken, classification
Brown Alundum product is obtained.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110372338A (en) * | 2019-08-30 | 2019-10-25 | 贵州大学 | A method of Brown Alundum is prepared using Powder bauxite and lime-ash |
Citations (3)
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