CN101712482A - Method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash - Google Patents
Method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash Download PDFInfo
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- CN101712482A CN101712482A CN200910154795A CN200910154795A CN101712482A CN 101712482 A CN101712482 A CN 101712482A CN 200910154795 A CN200910154795 A CN 200910154795A CN 200910154795 A CN200910154795 A CN 200910154795A CN 101712482 A CN101712482 A CN 101712482A
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- aluminum chloride
- ash
- aluminium
- water glass
- crystal aluminum
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Abstract
The invention relates to a method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash. Aiming at the disadvantages that conventional comprehensive aluminum ash utilization has a complex process and high cost and is easy to cause secondary pollution, the invention provides a method for producing the crystallized aluminum chloride and the soluble glass by the waste aluminum ash, which has a simple process, little residue, low cost and little pollution. The method for preparing the crystallized aluminum chloride and the soluble glass by the waste aluminum ash comprises the following steps of: (1) performing magnetic dressing and iron removal processing on the aluminum ash; (2) uniformly mixing the processed aluminum ash and Na2CO3; (3) performing high-temperature solid phase pyrolysis on the uniformly mixed mixture of the aluminum ash and Na2CO3; (4) performing acid pickling reaction on a solid phase pyrolysis product of the mixture of the aluminum ash and Na2CO3; (5) performing solid-liquid separation on an acid pickling product, condensing, crystallizing and drying the separated filtrate to obtain the crystallized aluminum chloride; and (6) uniformly mixing the separated sediment and NaOH to obtain the soluble glass from an alkali-soluble product.
Description
Technical field
The present invention relates to the technical field of the innoxious and resource utilization of refuse, particularly a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass.
Background technology
The aluminium ash is big, the with serious pollution industrial residue of a kind of amount, is mainly derived from links such as aluminium production, consumption, aluminium scrap regeneration.According to statistics, 1 ton of aluminium of every production will produce 25～50 kilograms aluminium ash.In recent years, China's aluminium throughput and output increase considerably, only aluminium in 2005 just reach 7,500,000 tons, like this, will produce 250,000 tons of aluminium slag aluminium ashes every year.Simultaneously, because in the processed and applied link, aluminium per ton will produce 30～40 kg aluminium slag aluminium ashes.Only China will produce 200,000～250,000 tons of aluminium slag aluminium ashes in the consumption link every year.Particularly aluminium scrap regeneration.The rate of recovery that goods also are processed in aluminium scrap regeneration again is generally 75%～85%, and the 1 ton of aluminium scrap of regenerating will produce 150～250 kg aluminium slag aluminium ashes.About 15 years of aluminum products date of retirement, China has entered aluminium scrap high payback period.Document announcement will be by the end of the year 2003, and China's aluminium scrap amount of savings has reached 5,320 ten thousand tons, before 2010, also will put aside about 4,300 ten thousand tons again.If these aluminium scraps are all regenerated, only this item will produce 1,500 ten thousand～2,500 ten thousand tons of aluminium slag aluminium ashes.The bulk deposition of aluminium ash not only causes the waste of resource, also causes the pollution of environment simultaneously, and therefore, it is imperative to the comprehensive utilization of aluminium ash to strengthen.
At present, the comprehensive utilization of aluminium ash mainly shows: with the aluminium ash is aspects such as raw material synthesized polymer aluminum chloride, many kinds of production aluminum oxide, the raw material of producing the highway material, the brown corundum of production.
1, be raw material synthesized polymer aluminum chloride with the aluminium ash
Flocculant of polymeric aluminium chloride also exists Al except that monomer that has aluminium and dimer
13(molecular formula AlO
4Al
12(OH)
24(H
2O)
12 7+) and the higher polymeric species of aluminium, be that a class is novel, the fine inorganic polymer flocculant.With the aluminium ash is that the production technique of feedstock production polymerize aluminum chloride has acid-soluble one-step, alkali solution technique and neutralisation.Wherein the product polymerize aluminum chloride content of alkali solution technique and neutralisation preparation is all lower, is difficult to apply, and the product polymerize aluminum chloride content of acid-soluble one-step preparation is high slightly, but the polymerization degree of this method sintetics is generally below 40%, and SiO
2Reach the Al that is wrapped up by glass microballon
2O
3, Fe
2O
3Be not used effectively Deng owing to be insoluble in acid, the solubility rate of aluminium ash is very low, the discarded further contaminate environment of a large amount of residues.
2, be the multiple aluminum oxide of raw material production with the aluminium ash
Aluminum oxide is divided into two big classes: a class is the metallurgical aluminum oxide as Aluminum Electrolysis Production, accounts for the great majority of aluminum oxide output; Another kind of is non-metallurgical aluminum oxide, comprises non-aluminium hydroxide used in metallurgy and aluminum oxide; With aluminium ash preparation aluminum oxide two kinds of approach are arranged generally: a kind of is to produce sodium aluminate solution earlier, gets aluminium hydroxide again and produces aluminum oxide through calcining; Another kind is that the aluminium ash is produced aluminum chloride earlier and added basifier then and get the preparation of aluminium hydroxide aluminum oxide.Because SiO
2Reach the Al that is wrapped up by glass microballon
2O
3, Fe
2O
3Be not used effectively Deng being insoluble in acid, the solubility rate of aluminium ash is very low, makes to utilize that aluminium ash preparation aluminum oxide exists that energy consumption is big, complicated operating process, be difficult to shortcoming such as realization.
3, be the material that the raw material production highway pavement is laid with the aluminium ash
The aluminium ash is mixed with ground silica, at 1350 ℃ of sintering, promptly make the material of road surface pavement, its hardness is 1.5 times of prevailing roadway material, anti-slide performance is 1.2 times of prevailing roadway material, but China discards utilizing approach and utilizing technology also very backward of aluminium ash at present, is that the raw material production road surfacing material also fails extensively to promote with the aluminium ash.
4, be raw material production palm fibre corundum with the aluminium ash
Corundum is the manufactured abrasive of industrial widespread use, is mainly used in mfg. moulding die and refractory materials.Utilize pretreated aluminium ash to be raw material, with hard coal make reductive agent, iron filings are produced brown corundum as precipitation agent, the products obtained therefrom index reaches secondary product index (88% aluminum oxide).The deficiency of this method is: pretreatment technology has not only increased production cost, and causes environmental pollution, and simultaneously, the required raw material aluminium ash of this technology is through extracting the aluminium ash of aluminium chlorohydroxide, does not have a ubiquity.
In sum, though the higher (Al of aluminium content of aluminium ash
2O
3: 43-75%), but because part aluminium is wrapped up by glass microballon, and part aluminium and silicon is present in the aluminium ash with the crystalline form, and this resource utilization that has just limited the aluminium ash is utilized again, thereby not only causes the waste of resource, the while is also caused the pollution of environment.
Summary of the invention
The objective of the invention is higher at existing complex process in the comprehensive utilization of existing aluminium ash, cost, easily cause the weak point of secondary pollution, providing that a kind of technology is simple, level of residue is few, cost is low, polluting few is the method for raw material production crystal aluminum chloride and water glass with the aluminium ash.
The technical solution adopted in the present invention is finished in the following way: a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass, and concrete steps are as follows:
(1) the aluminium ash is carried out pre-treatment;
(2) with pretreated aluminium ash and Na
2CO
3Mix;
(3) with the aluminium ash and the Na that mix
2CO
3Mixture by the high temperature solid-state thermolysis;
(4) to aluminium ash and Na
2CO
3The solid phase thermal decomposition product of mixture carries out acid-leaching reaction;
(5) the acidleach product is carried out solid-liquid separation, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH mixing after will separating makes water glass with the molten product of alkali.
In the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, it is to carry out the iron removal by magnetic separation pre-treatment that the aluminium ash is carried out pre-treatment.
In the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, Na
2CO
3Mix by mass ratio 1: 1.2～1.8 with pretreated aluminium ash.
In the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, with aluminium ash and the Na that mixes
2CO
3Mixture at 850 ℃～1000 ℃ following roast 1～2h, the main chemical compositions of aluminium scrap ash is Al
2O
3(Wt%=58～75%) and SiO
2(Wt%=15～25%) and Na
2CO
3Reaction generates nepheline, excessive Al
2O
3Continue and Na
2CO
3Reaction generates NaAlO
2(s).
In the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, with the product of roasting nepheline with in reactor, carry out acid-leaching reaction with the HCl of massfraction 3%～12%, 85 ℃～95 ℃ of its acidleach temperature, extraction time 2～4h, the aluminium in the aluminium ash leaches with the form of aluminum chloride.
In the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, the acidleach product is carried out solid-liquid separation, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying.
In the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, with the throw out after separating and NaOH 1: 0.6～1.3 mixings of pressing mass ratio, at 85～95 ℃ of following heated and stirred 0.5～1.5h, then the molten product of alkali is carried out solid-liquid separation through filter, filtrate makes water glass through evaporation concentration.
In above-mentioned steps (3), (4), (6), its reaction principle is as follows:
Solid phase thermolysis: 3Al
2O
32SiO
2(c)+Na
2CO
3(s)=2NaAlSiO
4(c)+2Al
2O
3(s)+CO
2(gas) ↑
Al
2O
3(excessive glass)+Na
2CO
3(s)=2NaAlO
2(s)+CO
2(gas) ↑
Acid-leaching reaction: NaAlSiO
4+ 4H
+=Al
3++ Na
++ H
2O+H
2SiO
3↓
NaAlO
2+4H
+＝Al
3++Na
++2H
2O
H
2SiO
3＝(1-n)H
2O+SiO
2.nH
2O
The molten reaction of alkali: SiO
2.nH
2O+2NaOH=Na
2SiO
3+ (n+1) H
2O
The present invention compares with existing aluminium ash method of comprehensive utilization, has following characteristics:
1, the present invention not only makes the Al that exists with crystalline form in the aluminium ash by solid phase thermolysis and acid-leaching reaction
2O
3With the maximized stripping of the aluminium that is wrapped up by glass microballon, and aluminium silicon is effectively separated, thereby prepare crystal aluminum chloride and water glass respectively.Overcome because of problems such as the low wasting of resources that causes of aluminium ash solubility rate, environmental pollutions.
2, the present invention can obtain more purified aluminium ash by the aluminium ash being carried out the iron removal by magnetic separation pre-treatment, thus the consumption of hydrochloric acid when reducing acid-leaching reaction, and can obtain the not aluminum chloride seminal fluid of ferrous contaminants.
3, among the present invention with Na
2CO
3With pretreated aluminium ash 1: 1.2～1.8 mixings of pressing mass ratio, can prevent excessive yellow soda ash and nepheline (NaAlSiO
4) react the alkaline nepheline of generation, influence the solubility rate of aluminium ash, can reduce the starting temperature (consumption of yellow soda ash is many more, and the starting temperature of reaction is low more) of reaction again, save cost.
4, the HCl of product of roasting and massfraction 3%～12% carries out acid-leaching reaction among the present invention in reactor, can obtain maximum sour molten rate, can avoid along with Cl in the solution again
-Increase, make the part A l in the solution
3+With Cl
-Form electronegative complex ion [AlCl
6 ] 3-Thereby, by the SiO of positively charged
2Colloidal polyurea particle avales, and causes the leaching amount of aluminium to descend.
5, the present invention is that feedstock production goes out crystal aluminum chloride and water glass with the aluminium scrap ash, has realized changing waste into resources.
6, technical process of the present invention simple, understand that be easy to realize, and discarded aluminium ash is after this art breading, the residual residue rate has reduced the environmental pollution that discarded aluminium ash is caused less than 10%.
In sum, the present invention has realized changing waste into resources, has effectively removed the environmental pollution that the aluminium ash is caused, and has advantages such as technology is simple, with low cost simultaneously, demonstrate fully the recycling economy feature of practicality, the feature of environmental protection and economy, have application value.
Embodiment
Contrast accompanying drawing below, the invention will be further described by embodiment.
Embodiment 1:
A kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass, its preparation process is:
(1) the aluminium ash is carried out the iron removal by magnetic separation pre-treatment;
(2) with Na
2CO
3Press 1: 1.2 mixing of mass ratio with pretreated aluminium ash;
(3) mixture is placed retort furnace with mixture, at 850 ℃ of following roast 2h;
(4) HCl with product of roasting nepheline and massfraction 3% carries out acid-leaching reaction in reactor, 85 ℃ of its acidleach temperature, and extraction time 4h, the aluminium in the aluminium ash leaches with the form of aluminum chloride;
(5) the acidleach product is carried out solid-liquid separation, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH after will separating presses 1: 0.6 mixing of mass ratio, at 85 ℃ of following heated and stirred 1.5h, then the molten product of alkali carried out solid-liquid separation through filter, and filtrate makes water glass through evaporation concentration.
Throw out oven dry with alkali after molten, weigh that to calculate the residual residue rate be 9.2%.
Embodiment 2:
A kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass.Its preparation process is:
(1) the aluminium ash is carried out the iron removal by magnetic separation pre-treatment;
(2) with Na
2CO
3Press 1: 1.4 mixing of mass ratio with pretreated aluminium ash;
(3) mixture is placed retort furnace with mixture, at 900 ℃ of following roast 1.5h;
(4) HCl with product of roasting nepheline and massfraction 6% carries out acid-leaching reaction in reactor, 90 ℃ of its acidleach temperature, and extraction time 3h, the aluminium in the aluminium ash leaches with the form of aluminum chloride;
(5) the acidleach product is carried out solid-liquid separation through filter, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH after will separating presses 1: 0.8 mixing of mass ratio, at 90 ℃ of following heated and stirred 1h, then the molten product of alkali carried out solid-liquid separation through filter, and filtrate makes water glass through evaporation concentration.
Throw out oven dry with alkali after molten, weigh that to calculate the residual residue rate be 8.9%.
Embodiment 3:
A kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass.Its preparation process is:
(1) the aluminium ash is carried out the iron removal by magnetic separation pre-treatment;
(2) with Na
2CO
3Press 1: 1.5 mixing of mass ratio with pretreated aluminium ash;
(3) mixture is placed retort furnace with mixture, at 930 ℃ of following roast 1.5h;
(4) HCl with product of roasting nepheline and massfraction 7% carries out acid-leaching reaction in reactor, 95 ℃ of its acidleach temperature, and extraction time 4h, the aluminium in the aluminium ash leaches with the form of aluminum chloride;
(5) the acidleach product is carried out solid-liquid separation through filter, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH after will separating presses 1: 1 mixing of mass ratio, at 95 ℃ of following heated and stirred 1.5h, then the molten product of alkali carried out solid-liquid separation through filter, and filtrate makes water glass through evaporation concentration.
Throw out oven dry with alkali after molten, weigh that to calculate the residual residue rate be 6.5%.
Embodiment 4:
A kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass.Its preparation process is:
(1) the aluminium ash is carried out the iron removal by magnetic separation pre-treatment;
(2) with Na
2CO
3Press 1: 1.7 mixing of mass ratio with pretreated aluminium ash;
(3) mixture is placed retort furnace with mixture, at 950 ℃ of following roast 1h;
(4) HCl with product of roasting nepheline and massfraction 12% carries out acid-leaching reaction in reactor, 85 ℃ of its acidleach temperature, and extraction time 4h, the aluminium in the aluminium ash leaches with the form of aluminum chloride;
(5) the acidleach product is carried out solid-liquid separation through filter, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH after will separating presses 1: 1.3 mixing of mass ratio, at 90 ℃ of following heated and stirred 0.5h, then the molten product of alkali carried out solid-liquid separation through filter, and filtrate makes water glass through evaporation concentration.
Throw out oven dry with alkali after molten, weigh that to calculate the residual residue rate be 4.2%.
Embodiment 5:
A kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass.Its preparation process is:
(1) the aluminium ash is carried out the iron removal by magnetic separation pre-treatment;
(2) with Na
2CO
3Press 1: 1.8 mixing of mass ratio with pretreated aluminium ash;
(3) mixture is placed retort furnace with mixture, at 980 ℃ of following roast 2h;
(4) HCl with product of roasting nepheline and massfraction 8% carries out acid-leaching reaction in reactor, 90 ℃ of its acidleach temperature, and extraction time 3.5h, the aluminium in the aluminium ash leaches with the form of aluminum chloride;
(5) the acidleach product is carried out solid-liquid separation through filter, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH after will separating presses 1: 0.68 mixing of mass ratio, at 95 ℃ of following heated and stirred 0.5h, then the molten product of alkali carried out solid-liquid separation through filter, and filtrate makes water glass through evaporation concentration.
Throw out oven dry with alkali after molten, weigh that to calculate the residual residue rate be 8.8%.
Embodiment 6:
A kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass.Its preparation process is:
(1) the aluminium ash is carried out the iron removal by magnetic separation pre-treatment;
(2) with Na
2CO
3Press 1: 1.6 mixing of mass ratio with pretreated aluminium ash;
(3) mixture is placed retort furnace with mixture, at 1000 ℃ of following roast 1h;
(4) HCl with product of roasting nepheline and massfraction 9% carries out acid-leaching reaction in reactor, 95 ℃ of its acidleach temperature, and extraction time 2.5h, the aluminium in the aluminium ash leaches with the form of aluminum chloride;
(5) the acidleach product is carried out solid-liquid separation through filter, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH after will separating presses 1: 0.95 mixing of mass ratio, at 85 ℃ of following heated and stirred 1h, then the molten product of alkali carried out solid-liquid separation through filter, and filtrate makes water glass through evaporation concentration.
Throw out oven dry with alkali after molten, weigh that to calculate the residual residue rate be 6.0%.
Claims (8)
1. one kind is utilized the grey method for preparing crystal aluminum chloride and water glass of aluminium scrap, it is characterized in that: utilize the step of aluminium scrap ash preparation crystal aluminum chloride and water glass method as follows:
(1) the aluminium ash is carried out pre-treatment;
(2) with pretreated aluminium ash and Na
2CO
3Mix;
(3) with the aluminium ash and the Na that mix
2CO
3Mixture by the high temperature solid-state thermolysis;
(4) to aluminium ash and Na
2CO
3The solid phase thermal decomposition product of mixture carries out acid-leaching reaction;
(5) the acidleach product is carried out solid-liquid separation, the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying;
(6) throw out and the NaOH mixing after will separating makes water glass with the molten product of alkali.
2. a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass according to claim 1, it is characterized in that: in the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, it is to carry out the iron removal by magnetic separation pre-treatment that the aluminium ash is carried out pre-treatment.
3. a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass according to claim 1 and 2 is characterized in that: in the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, and Na
2CO
3Mix by mass ratio 1: 1.2～1.8 with pretreated aluminium ash.
4. a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass according to claim 1 and 2 is characterized in that: in the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, with aluminium ash and the Na that mixes
2CO
3Mixture at 850 ℃～1000 ℃ following roast 1～2h, reaction generates nepheline.
5. a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass according to claim 1 and 2, it is characterized in that: in the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, with the product of roasting nepheline with in reactor, carry out acid-leaching reaction with the HCl of massfraction 3%～12%, 85 ℃～95 ℃ of its acidleach temperature, extraction time 2～4h.
6. a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass according to claim 1 and 2, it is characterized in that: in the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, the acidleach product is carried out solid-liquid separation, concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying.
7. a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass according to claim 1 and 2, it is characterized in that: in the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, with the throw out after separating and NaOH 1: 0.6～1.3 mixings of pressing mass ratio, at 85～95 ℃ of following heated and stirred 0.5～1.5h, then the molten product of alkali is carried out solid-liquid separation through filter, filtrate makes water glass through evaporation concentration.
8. a kind of method of utilizing the aluminium scrap ash to prepare crystal aluminum chloride and water glass according to claim 3 is characterized in that: in the step of utilizing aluminium scrap ash preparation crystal aluminum chloride and water glass method, with aluminium ash and the Na that mixes
2CO
3Mixture at 850 ℃～1000 ℃ following roast 1～2h, reaction generates nepheline; With the product of roasting nepheline with in reactor, carry out acid-leaching reaction, 85 ℃～95 ℃ of its acidleach temperature, extraction time 2～4h with the HCl of massfraction 3%～12%; The acidleach product is carried out solid-liquid separation, and the concentrating filter liquor crystallization after the separation makes crystal aluminum chloride after the drying; With the throw out after separating and NaOH 1: 0.6～1.3 mixings of pressing mass ratio, at 85～95 ℃ of following heated and stirred 0.5～1.5h, then the molten product of alkali to be passed through filter and carry out solid-liquid separation, filtrate makes water glass through evaporation concentration.
Priority Applications (1)
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|---|---|---|---|
| CN200910154795A CN101712482A (en) | 2009-12-07 | 2009-12-07 | Method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910154795A CN101712482A (en) | 2009-12-07 | 2009-12-07 | Method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash |
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| Publication Number | Publication Date |
|---|---|
| CN101712482A true CN101712482A (en) | 2010-05-26 |
Family
ID=42416551
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|---|---|---|---|
| CN200910154795A Pending CN101712482A (en) | 2009-12-07 | 2009-12-07 | Method for preparing crystallized aluminum chloride and soluble glass by waste aluminum ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701242A (en) * | 2012-05-16 | 2012-10-03 | 清华大学 | Process method for producing high-purity aluminum oxide and silicate by using pulverized fuel ash |
| CN105152197A (en) * | 2015-09-08 | 2015-12-16 | 海南宜净环保有限公司 | Preparation method for poly aluminium chloride |
| CN107758682A (en) * | 2017-09-05 | 2018-03-06 | 山东鲁北企业集团总公司 | The disposable method for utilizing aluminum oxide in aluminium ash |
| CN108239704A (en) * | 2018-01-23 | 2018-07-03 | 环境保护部华南环境科学研究所 | A kind of method of Quadratic aluminum dust recycling production aluminium oxide |
| CN113716591A (en) * | 2021-08-30 | 2021-11-30 | 河南同本科技有限公司 | Aluminum ash recycling method |
| CN116462215A (en) * | 2023-04-04 | 2023-07-21 | 华南理工大学 | Recycling treatment method of secondary aluminum ash |
-
2009
- 2009-12-07 CN CN200910154795A patent/CN101712482A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701242A (en) * | 2012-05-16 | 2012-10-03 | 清华大学 | Process method for producing high-purity aluminum oxide and silicate by using pulverized fuel ash |
| CN105152197A (en) * | 2015-09-08 | 2015-12-16 | 海南宜净环保有限公司 | Preparation method for poly aluminium chloride |
| CN107758682A (en) * | 2017-09-05 | 2018-03-06 | 山东鲁北企业集团总公司 | The disposable method for utilizing aluminum oxide in aluminium ash |
| CN108239704A (en) * | 2018-01-23 | 2018-07-03 | 环境保护部华南环境科学研究所 | A kind of method of Quadratic aluminum dust recycling production aluminium oxide |
| CN113716591A (en) * | 2021-08-30 | 2021-11-30 | 河南同本科技有限公司 | Aluminum ash recycling method |
| CN116462215A (en) * | 2023-04-04 | 2023-07-21 | 华南理工大学 | Recycling treatment method of secondary aluminum ash |
| CN116462215B (en) * | 2023-04-04 | 2024-04-12 | 华南理工大学 | Recycling treatment method of secondary aluminum ash |
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