CN104962748A - Method for efficiently separating and recycling metallic aluminum from aluminum ash - Google Patents
Method for efficiently separating and recycling metallic aluminum from aluminum ash Download PDFInfo
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- CN104962748A CN104962748A CN201510370094.6A CN201510370094A CN104962748A CN 104962748 A CN104962748 A CN 104962748A CN 201510370094 A CN201510370094 A CN 201510370094A CN 104962748 A CN104962748 A CN 104962748A
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- aluminium
- ash
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a method for efficiently separating and recycling metallic aluminum from aluminum ash. The method comprises the first step of strong acid soaking, the second step of baking, the third step of smashing, the fourth step of separating agent mixing, the fifth step of metallic aluminum precipitation through hot melting and the sixth step of metallic aluminum recycling. According to the method for efficiently separating and recycling the metallic aluminum from the aluminum ash, the technology is simple and convenient and easy to achieve, and due to the fact that acid leaching is conducted to remove impurities and a separating agent of Na3AlF6 is added, the recycling efficiency of the metallic aluminum is effectively improved; meanwhile, the melting temperature is lowered, the energy consumption is reduced, and the economic benefit of an enterprise is effectively improved.
Description
Technical field
The present invention relates to aluminium ash processing recovery technology field, particularly relate to a kind of method that high efficiency separation reclaims metallic aluminium in aluminium ash.
Background technology
Aluminium ash is large, the with serious pollution industrial residue of a kind of output, is also a kind of important secondary resource simultaneously, is mainly derived from the aluminium smelter enterprises such as electrolytic aluminium factory, aluminium section bar plant, cast aluminium alloy factory (comprising secondary aluminum).According to statistics, often produce 1000T aluminium, the aluminium ash of about 25T will be produced.The bulk deposition of aluminium ash, not only causes the waste of resource, also causes the pollution of environment simultaneously, and therefore, the comprehensive utilization strengthening aluminium ash is imperative.The main component of aluminium ash is SiO
2and Al
2o
3, SiO
2content generally at 5 ~ 20%, Al
2o
3content generally 43 ~ 75%, after the recycling of routine, in remaining aluminium scrap ash still containing 10 ~ 15% metallic aluminium, thus there is very high recovery value.China's aluminum current grey process rate of recovery is low, recovery aluminium that can not be higher, and the consumption of energy is large, waste is large, is unfavorable for the economic benefit of raising enterprise and preserves the ecological environment.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of method that high efficiency separation reclaims metallic aluminium in aluminium ash, can solve the problems referred to above that existing aluminium ash recovery and treatment method exists.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of high efficiency separation to reclaim the method for metallic aluminium in aluminium ash, comprise the steps:
(1) strong acid soaks: after being soaked with strong acid by aluminium ash, rinse well, to remove impurity with clear water;
(2) bake and bank up with earth: will to soak and the aluminium ash rinsed well is placed in electrical heater high-temperature bake;
(3) pulverize: the aluminium ash after baking and banking up with earth in step (2) is crushed to below 100 orders;
(4) composite liberation agent: add a certain amount of flux in the aluminium ash after pulverizing in step (3), and be uniformly mixed;
(5) hot melt: the mixture of the aluminium stirred in step (4) ash and flux is placed in rotary kiln, and heating makes metallic aluminium melting separate out;
(6) Footwall drift aluminium: the liquid aluminium of melting is under self gravitation, and flowing is pooled to the bottom of rotary kiln, reclaims and obtains metallic aluminium.
In a preferred embodiment of the present invention, in described step (1), described strong acid is hydrochloric acid; Described soaking conditions is: temperature 60 ~ 70 DEG C, time 3 ~ 4h, concentration of hydrochloric acid 100 ~ 130g/L.
In a preferred embodiment of the present invention, in described step (2), described in the condition of baking and banking up with earth be: temperature 1000 ~ 1100 DEG C, time 1 ~ 2h.
In a preferred embodiment of the present invention, in described step (4), described flux is Na
3alF
6, its add-on is 10% of aluminium ash weight.
In a preferred embodiment of the present invention, in described step (5), described heating and melting temperature is 680 DEG C.
The invention has the beneficial effects as follows: a kind of high efficiency separation of the present invention reclaims the method for metallic aluminium in aluminium ash, and simple process, easily realizes, and it is by acidleach removal of impurities and separating agent Na
3alF
6add, effectively improve the organic efficiency of metallic aluminium, reduce melt temperature simultaneously, saved energy consumption, effectively can improve the economic benefit of enterprise.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The embodiment of the present invention comprises:
Embodiment 1
Present invention is disclosed a kind of method that high efficiency separation reclaims metallic aluminium in aluminium ash, concrete steps are as follows:
Strong acid soaks: reactor aluminium ash being placed in band whipping appts is that the hydrochloric acid of 100g/L soaks 4h while stirring at 70 DEG C by concentration, then filters and by cold water flush to clean, to remove acid soluble impurities;
Bake and bank up with earth: will to soak and the aluminium ash rinsed well is placed in electrical heater, high-temperature bake 2h at 1000 DEG C;
Pulverize: the aluminium ash pulverizer after baking and banking up with earth is crushed to below 100 orders;
Composite liberation agent: add the separating agent Na accounting for aluminium ash weight 10% in the aluminium ash after pulverizing
3alF
6, and be uniformly mixed; Na
3alF
6can adsorb and dissolve Al
2o
3, contribute to reducing melt temperature, promote aluminium melting;
Hot melt: the mixture of the aluminium stirred ash and separating agent is placed in rotary kiln, is heated to 680 DEG C and metallic aluminium melting is separated out;
Footwall drift aluminium: the liquid aluminium of melting is under self gravitation, and flowing is pooled to the bottom of rotary kiln, reclaims and obtains metallic aluminium.
Measure through weighing, the rate of recovery of aluminium is 92%, and the red metal aluminum content of aluminium ash drops to 11% from 45%.
Embodiment 2
Present invention is disclosed a kind of method that high efficiency separation reclaims metallic aluminium in aluminium ash, concrete steps are as follows:
Strong acid soaks: reactor aluminium ash being placed in band whipping appts is that the hydrochloric acid of 130g/L soaks 3h while stirring at 60 DEG C by concentration, then filters and by cold water flush to clean, to remove acid soluble impurities;
Bake and bank up with earth: will to soak and the aluminium ash rinsed well is placed in electrical heater, high-temperature bake 1h at 1100 DEG C;
Pulverize: the aluminium ash pulverizer after baking and banking up with earth is crushed to below 100 orders;
Composite liberation agent: add the flux Na accounting for aluminium ash weight 10% in the aluminium ash after pulverizing
3alF
6, and be uniformly mixed; Na
3alF
6can adsorb and dissolve Al
2o
3, contribute to reducing melt temperature, promote aluminium melting;
Hot melt: the mixture of the aluminium stirred ash and flux is placed in rotary kiln, is heated to 680 DEG C and metallic aluminium melting is separated out;
Footwall drift aluminium: the liquid aluminium of melting is under self gravitation, and flowing is pooled to the bottom of rotary kiln, reclaims and obtains metallic aluminium.
Measure through weighing, the rate of recovery of aluminium is 95%, and the red metal aluminum content of aluminium ash drops to 10% from 45%.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. high efficiency separation reclaims a method for metallic aluminium in aluminium ash, it is characterized in that, comprises the steps:
(1) strong acid soaks: after being soaked with strong acid by aluminium ash, rinse well, to remove impurity with clear water;
(2) bake and bank up with earth: will to soak and the aluminium ash rinsed well is placed in electrical heater high-temperature bake;
(3) pulverize: the aluminium ash after baking and banking up with earth in step (2) is crushed to below 100 orders;
(4) composite liberation agent: add a certain amount of flux in the aluminium ash after pulverizing in step (3), and be uniformly mixed;
(5) hot melt: the mixture of the aluminium stirred in step (4) ash and flux is placed in rotary kiln, and heating makes metallic aluminium melting separate out;
(6) Footwall drift aluminium: the liquid aluminium of melting is under self gravitation, and flowing is pooled to the bottom of rotary kiln, reclaims and obtains metallic aluminium.
2. a kind of high efficiency separation according to claim 1 reclaims the method for metallic aluminium in aluminium ash, and it is characterized in that, in described step (1), described strong acid is hydrochloric acid; Described soaking conditions is: temperature 60 ~ 70 DEG C, time 3 ~ 4h, concentration of hydrochloric acid 100 ~ 130g/L.
3. a kind of high efficiency separation according to claim 1 reclaims the method for metallic aluminium in aluminium ash, it is characterized in that, in described step (2), described in the condition of baking and banking up with earth be: temperature 1000 ~ 1100 DEG C, time 1 ~ 2h.
4. a kind of high efficiency separation according to claim 1 reclaims the method for metallic aluminium in aluminium ash, and it is characterized in that, in described step (4), described flux is Na
3alF
6, its add-on is 10% of aluminium ash weight.
5. a kind of high efficiency separation according to claim 1 reclaims the method for metallic aluminium in aluminium ash, and it is characterized in that, in described step (5), described heating and melting temperature is 680 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370094.6A CN104962748A (en) | 2015-06-30 | 2015-06-30 | Method for efficiently separating and recycling metallic aluminum from aluminum ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370094.6A CN104962748A (en) | 2015-06-30 | 2015-06-30 | Method for efficiently separating and recycling metallic aluminum from aluminum ash |
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|---|---|
| CN104962748A true CN104962748A (en) | 2015-10-07 |
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|---|---|---|---|
| CN201510370094.6A Pending CN104962748A (en) | 2015-06-30 | 2015-06-30 | Method for efficiently separating and recycling metallic aluminum from aluminum ash |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107779605A (en) * | 2017-12-08 | 2018-03-09 | 欧艳 | A kind of method that aluminium is extracted in the ash from aluminium |
| CN110846514A (en) * | 2019-12-06 | 2020-02-28 | 隆达铝业（顺平）有限公司 | High-efficiency recovery method for secondary aluminum |
| CN112961992A (en) * | 2021-02-01 | 2021-06-15 | 云南锴晟特种金属有限公司 | Aluminum ash frying agent and application thereof |
Citations (4)
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|---|---|---|---|---|
| JPS5719343A (en) * | 1980-07-07 | 1982-02-01 | Ryozo Kondo | Wet process separating and purifying method of metallic aluminum and aluminum oxide from aluminum ash |
| CN101823741A (en) * | 2010-02-03 | 2010-09-08 | 中南大学 | Method for continuously producing aluminium electrolysis raw materials high-fluorine alumina, cryolite and sodium silicate with aluminum dust |
| CN102392139A (en) * | 2011-11-23 | 2012-03-28 | 江西万泰铝业有限公司 | Technology for treating cold aluminous ash by utilization of tilting furnace |
| CN103952557A (en) * | 2014-03-20 | 2014-07-30 | 浙江大学 | Method for secondary acid leaching of alumina in coal ash residues |
-
2015
- 2015-06-30 CN CN201510370094.6A patent/CN104962748A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5719343A (en) * | 1980-07-07 | 1982-02-01 | Ryozo Kondo | Wet process separating and purifying method of metallic aluminum and aluminum oxide from aluminum ash |
| CN101823741A (en) * | 2010-02-03 | 2010-09-08 | 中南大学 | Method for continuously producing aluminium electrolysis raw materials high-fluorine alumina, cryolite and sodium silicate with aluminum dust |
| CN102392139A (en) * | 2011-11-23 | 2012-03-28 | 江西万泰铝业有限公司 | Technology for treating cold aluminous ash by utilization of tilting furnace |
| CN103952557A (en) * | 2014-03-20 | 2014-07-30 | 浙江大学 | Method for secondary acid leaching of alumina in coal ash residues |
Non-Patent Citations (3)
| Title |
|---|
| 周扬民: "铝灰的无害化处理及综合利用研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
| 李远兵等: "《铝工业固体废弃物综合利用》", 31 March 2015 * |
| 郑磊: "铝灰高效分离提取及循环利用研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107779605A (en) * | 2017-12-08 | 2018-03-09 | 欧艳 | A kind of method that aluminium is extracted in the ash from aluminium |
| CN110846514A (en) * | 2019-12-06 | 2020-02-28 | 隆达铝业（顺平）有限公司 | High-efficiency recovery method for secondary aluminum |
| CN112961992A (en) * | 2021-02-01 | 2021-06-15 | 云南锴晟特种金属有限公司 | Aluminum ash frying agent and application thereof |
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