CN101619396A - Method for directly using aluminum and aluminum alloy ash for electrolytic production and recycling - Google Patents
Method for directly using aluminum and aluminum alloy ash for electrolytic production and recycling Download PDFInfo
- Publication number
- CN101619396A CN101619396A CN200910017817A CN200910017817A CN101619396A CN 101619396 A CN101619396 A CN 101619396A CN 200910017817 A CN200910017817 A CN 200910017817A CN 200910017817 A CN200910017817 A CN 200910017817A CN 101619396 A CN101619396 A CN 101619396A
- Authority
- CN
- China
- Prior art keywords
- aluminium
- ash
- aluminum
- electrolyzer
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The invention relates to aluminum and aluminum alloy ash directly using for an electrolytic production recycling method, comprising the following steps: 1) when the aluminum alloy is melted and matched, adding 0.1-0.2%, based on the total weight of the aluminum alloy, of slagging agent by a nitrogen producing machine when the aluminium alloy is heated to 760-780 DEG C; 2) and standing the aluminum alloy for 10-15 minutes at retained temperature after adding the slagging agent, and then carrying out slag removal; 3) transporting the removed aluminum ash into a residue field and cooling the removed aluminum ash naturally; 4) collecting the aluminum ash when the temperature is reduced to normal temperature; 5) transporting the aluminum ash collected in step 4 to an electrolytic plant, adding the aluminum ash into an electrolytic bath; and 6) transporting the aluminum generated in the electrolytic bath into a smelting furnace to carry out aluminum alloy melting and matching, then continually recycling the aluminum ash generated by the melted and matched aluminum alloy. The invention has simple and convenient process flow, and doses not affect the melting and matching process in later stage; not only saves the cost, but also prevents pollution, really realizes economic recycling, and has significant economic benefits.
Description
Technical field
The present invention relates to the recycle method of a kind of aluminium and aluminium alloy aluminium ash, especially a kind of aluminium and aluminum alloy ash are directly used in the method that electrolytic production recycling is utilized.
Background technology
The main component of aluminium and aluminium alloy aluminium ash (hereinafter to be referred as the aluminium ash) is the halogenide of metals such as the oxide compound of metallic aluminium, aluminum oxide and iron, silicon, magnesium and potassium, sodium, calcium, magnesium, and wherein metallic aluminium and aluminum oxide account for the overwhelming majority.At present, the treatment process of conventional cast aluminium ash is to adopt cauldron to fry the method recovery aluminium wherein of ash, can produce a large amount of flue dust in the whole stir-fry ash process.This method can only reclaim the aluminium in the aluminium ash, for the also higher aluminum oxide of content, adopts methods such as flushing, filtration to reclaim the back and sells.The entire treatment process is more serious to the damage ratio of environment.
If general aluminium ash adopts electrolytic method to reclaim, must pass through advanced processing (during processing also can environment cause sizable pollution), otherwise can have a negative impact electrolysis production, have a strong impact on the carrying out of electrolysis production.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of the need that the aluminium ash is handled, both saved the expense of processing, avoid the pollution of environment again, aluminium that technical process is easy and aluminum alloy ash are directly used in the method that electrolytic production recycling is utilized.
For achieving the above object, the present invention adopts following technical proposals:
A kind of aluminium and aluminum alloy ash are directly used in the method that electrolytic production recycling is utilized, and may further comprise the steps:
1), molten when joining aluminium alloy, when the aluminium alloy temperature rises to 760～780 ℃, add slag former according to molten 0.1～0.2% usefulness Nitrogen plant of joining the aluminium alloy gross weight;
2), add slag former after, insulation was left standstill 10～15 minutes, skimmed then;
3), with step 2) the aluminium ash that claws is transported to the slag field and lowers the temperature naturally;
When 4), aluminium ash temperature is reduced to normal temperature it is collected;
5), the aluminium ash that step 4) is collected is transported to potroom, add 5kg according to every electrolyzer at every turn, the method that added once every 45 minutes joins the aluminium ash in the electrolyzer, and stir, quicken the fusion electrolysis of aluminium ash in electrolyzer, every electrolyzer add-on every day is controlled at 150kg～200kg;
6), electrolyzer output aluminium be transported to smelting furnace carry out that alloy is molten joins, fusion alloying produces the aluminium ash and proceeds cycling and reutilization.
Slag former in the described step 1) comprises the composition of following weight part: MgF
212～15 parts, 25～30 parts of NaF, Na
3AlF
618～22 parts, Na
2CO
315～20 parts, Na
2SiF
612～15 parts, NaAlF
412～15 parts.
Add aluminium ash amount every day according to every electrolyzer in the described step 5) cell technologies is adjusted accordingly,,,, make interior NaF of electrolyzer and AlF to reduce electrolytical molecular ratio so need to add more aluminum fluoride because it is more to contain sodium salt (NaF) in this aluminium ash
3Molecular ratio remain on 2.3～2.5; Also contain more aluminum oxide in this aluminium ash,, reduce the input amount of aluminum oxide, thereby prevent to form the material balance of bearth precipitation or crust destruction electrolyzer so should prolong reinforced 2～3 seconds at interval; Also contain more metallic aluminium in this aluminium ash simultaneously, so the aluminum yield of every day increasing 50～100kg, to stablize the heat balance of electrolyzer.
The present invention is by above-mentioned slag-cleaning agent in the melting refining process of aluminium and aluminium alloy, and the aluminium ash that is produced need directly not return electrolyzer through processing and carry out the electrolysis cycle utilization.Adopt this slag-cleaning agent not only to guarantee the scarfing cinder effect, and wherein have the element kind of disadvantageous effect and content all very low electrolysis production.Do not need the aluminium ash is handled before aluminium ash through using this slag-cleaning agent to produce is adding electrolyzer, both saved the expense of handling, avoided the pollution of environment again; This aluminium ash is carried out electrolysis not only all reclaimed metallic aluminium in the aluminium ash, and reclaimed the aluminum oxide in the aluminium ash, and also can not produce big influence the steady trouble-free operation of electrolysis production.The aluminium that last electrolysis produces can carry out the molten of alloy joins, and its content of elements is all in controlled range.
Following physical-chemical reaction takes place in the principal element composition in the aluminium ash in electrolyzer:
(1) Al
2O
3: participate in the total reaction of electrolysis of aluminum, i.e. Al
2O
3Electrolysis generates Al, and carbon anode participates in electrochemical reaction and generates CO simultaneously
2Net reaction is:
2Al
2O
3+3C＝＝4Al+3CO
2
(2)Na、F、Al：
In order to improve electrolytical physicochemical property, at the molten salt system Na of electrolysis of aluminum
3AlF
6-Al
2O
3Add AlF in the system
3, become Na
3AlF
6-AlF
3-Al
2O
3Ternary system.Above-mentioned three kinds of elements join among the system, and are identical with the element ion that has had in the molten salt system, can not influence the chemical ingredients of normal electrochemical reaction process and change primary aluminum as impurity element.
(3)Mg、Si：
Though these two kinds of elements are not the intrinsic elements in the electrolyzer, in follow-up alloy production process, need to add.And can not produce harmful effect to electrolytic process therefore be not deleterious impurity element, and its content all in controlled range, has certain content can not have a negative impact for follow-up alloy production in the primary aluminum.
The difference that main component aluminum oxide in the aluminium ash and primary aluminum are produced the desired raw material metallurgical-grade aluminum oxide is that crystallization crystal formation, granularity, the geometrical shape of aluminum oxide is different, causes its solubility property difference in sodium aluminum fluoride.In order to guarantee the fully dissolving in ionogen of aluminium ash, preventing to add excessive meeting exerts an influence to the electrolyzer ordinary production, the aluminium ash that described slag-cleaning agent is produced adds on a small quantity from the aluminium flowing-out mouth gradation of electrolyzer, and agitation as appropriate, quickens its dissolving and reaction in electrolyzer.
This procedure is for after adopting described slag-cleaning agent and producing slag, adds from aluminium flowing-out mouth before delivering to electrolyzer then.In order to guarantee the fully fusion in ionogen of aluminium ash, adopt the interval certain hour in electrolyzer, to add a certain amount of aluminium ash, and carry out the method for agitation as appropriate, quicken its fusion electrolysis in electrolyzer.In order in the electrolytic aluminum ash, to guarantee steadily carrying out smoothly of normal electrolysis production, the electrolysis process technical qualification are carried out suitable adjustment according to practical situation.Because it is more to contain sodium salt in this aluminium ash, so need to add more aluminum fluoride, to reduce electrolytical molecular ratio, it is sticking too high with temperature not cause ionogen to be crossed; Also contain more aluminum oxide in this aluminium ash,, reduce the input amount of aluminum oxide, prevent to form bearth precipitation or crust, destroy the material balance of electrolyzer so answer proper extension at interval reinforced; Also contain more metallic aluminium in this aluminium ash simultaneously, so the aluminum yield of every day strengthens suitably, to stablize the heat balance of electrolyzer; Guarantee that the stable of electrolysis production carries out smoothly.
The aluminium of this method institute output is because the adding of aluminium ash contains many trace elements, but in follow-up alloy production process, need to add, and can not produce harmful effect to electrolytic process therefore be not deleterious impurity element, has certain content can not have a negative impact for follow-up alloy production in the primary aluminum.Can carry out the molten of casting alloy and join, its content of elements is all in controlled range.The present invention not only technical process is easy, does not influence the molten process of joining of later stage simultaneously; Both saved cost, prevented pollution again, really realized recycling economy, the economic benefit highly significant.
Embodiment
The present invention is further described below in conjunction with embodiment.
A kind of aluminium and aluminum alloy ash are directly used in the method that electrolytic production recycling is utilized, and may further comprise the steps:
1), molten when joining aluminium alloy, when the aluminium alloy temperature rises to 760～780 ℃, add slag former according to molten 0.1～0.2% usefulness Nitrogen plant of joining the aluminium alloy gross weight;
2), add slag former after, insulation was left standstill 10～15 minutes, skimmed then;
3), with step 2) the aluminium ash that claws is transported to the slag field and lowers the temperature naturally;
When 4), aluminium ash temperature is reduced to normal temperature it is collected;
5), the aluminium ash that step 4) is collected is transported to potroom, add 5kg according to every electrolyzer at every turn, the method that added once every 45 minutes joins the aluminium ash in the electrolyzer, and stir, quicken the fusion electrolysis of aluminium ash in electrolyzer, every electrolyzer add-on every day is controlled at 150kg～200kg;
6), electrolyzer output aluminium be transported to smelting furnace carry out that alloy is molten joins, fusion alloying produces the aluminium ash and proceeds cycling and reutilization.
Slag former in the described step 1) comprises the composition of following weight part: MgF
212～15 parts, 25～30 parts of NaF, Na
3AlF
618～22 parts, Na
2CO
315～20 parts, Na
2SiF
612～15 parts, NaAlF
412～15 parts.
Add aluminium ash amount every day according to every electrolyzer in the described step 5) cell technologies is adjusted accordingly,,,, make interior NaF of electrolyzer and AlF to reduce electrolytical molecular ratio so need to add more aluminum fluoride because it is more to contain sodium salt (NaF) in this aluminium ash
3Molecular ratio remain on 2.3～2.5; Also contain more aluminum oxide in this aluminium ash,, reduce the input amount of aluminum oxide, thereby prevent to form the material balance of bearth precipitation or crust destruction electrolyzer so should prolong reinforced 2～3 seconds at interval; Also contain more metallic aluminium in this aluminium ash simultaneously, so the aluminum yield of every day increasing 50～100kg, to stablize the heat balance of electrolyzer.
Claims (3)
1. aluminium and aluminum alloy ash are directly used in the method that electrolytic production recycling is utilized, and it is characterized in that, may further comprise the steps:
1), molten when joining aluminium alloy, when the aluminium alloy temperature rises to 760～780 ℃, add slag former according to molten 0.1～0.2% usefulness Nitrogen plant of joining the aluminium alloy gross weight;
2), add slag former after, insulation was left standstill 10～15 minutes, skimmed then;
3), with step 2) the aluminium ash that claws is transported to the slag field and lowers the temperature naturally;
When 4), aluminium ash temperature is reduced to normal temperature it is collected;
5), the aluminium ash that step 4) is collected is transported to potroom, add 5kg according to every electrolyzer at every turn, the method that added once every 45 minutes joins the aluminium ash in the electrolyzer, and stir, quicken the fusion electrolysis of aluminium ash in electrolyzer, every electrolyzer add-on every day is controlled at 150kg～200kg;
6), electrolyzer output aluminium be transported to smelting furnace carry out that alloy is molten joins, fusion alloying produces the aluminium ash and proceeds cycling and reutilization.
2. aluminium according to claim 1 and aluminum alloy ash are directly used in the method that electrolytic production recycling is utilized, and it is characterized in that: the slag former in the described step 1) comprises the composition of following weight part: MgF
212～15 parts, 25～30 parts of NaF, Na
3AlF
618～22 parts, Na
2CO
315～20 parts, Na
2SiF
612～15 parts, NaAlF
412～15 parts.
3. aluminium according to claim 1 and aluminum alloy ash are directly used in the method that electrolytic production recycling is utilized, it is characterized in that: add aluminium ash amount every day according to every electrolyzer in the described step 5) cell technologies is adjusted accordingly, because it is more to contain sodium salt in this aluminium ash, so need to add more aluminum fluoride, to reduce electrolytical molecular ratio, make NaF and AlF in the electrolyzer
3Molecular ratio remain on 2.3～2.5; Also contain more aluminum oxide in this aluminium ash,, reduce the input amount of aluminum oxide, thereby prevent to form the material balance of bearth precipitation or crust destruction electrolyzer so should prolong reinforced 2～3 seconds at interval; Also contain more metallic aluminium in this aluminium ash simultaneously, so the aluminum yield of every day increasing 50～100kg, to stablize the heat balance of electrolyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100178179A CN101619396B (en) | 2009-08-10 | 2009-08-10 | Method for directly using aluminum and aluminum alloy ash for electrolytic production and recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100178179A CN101619396B (en) | 2009-08-10 | 2009-08-10 | Method for directly using aluminum and aluminum alloy ash for electrolytic production and recycling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101619396A true CN101619396A (en) | 2010-01-06 |
| CN101619396B CN101619396B (en) | 2011-07-20 |
Family
ID=41512808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100178179A Expired - Fee Related CN101619396B (en) | 2009-08-10 | 2009-08-10 | Method for directly using aluminum and aluminum alloy ash for electrolytic production and recycling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101619396B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012159590A1 (en) * | 2012-05-23 | 2012-11-29 | 深圳市新星轻合金材料股份有限公司 | Electrolyte supplement system in aluminum electrolytic process and manufacturing method therefor |
| CN103160693A (en) * | 2013-03-12 | 2013-06-19 | 焦作万方铝业股份有限公司 | Method for aluminum ash treatment and recycling use |
| CN108728658A (en) * | 2018-06-13 | 2018-11-02 | 广州市盘古机器人科技有限公司 | Hot aluminium harrows slag technology processing system |
| CN110257642A (en) * | 2019-07-01 | 2019-09-20 | 北京科技大学 | A kind of resource utilization method of secondary aluminium alloy ash |
-
2009
- 2009-08-10 CN CN2009100178179A patent/CN101619396B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012159590A1 (en) * | 2012-05-23 | 2012-11-29 | 深圳市新星轻合金材料股份有限公司 | Electrolyte supplement system in aluminum electrolytic process and manufacturing method therefor |
| GB2502392A (en) * | 2012-05-23 | 2013-11-27 | Shenzhen Sunxing Light Alloys Materials Co Ltd | Electrolyte supplement system in aluminium electrolytic process and manufacturing method therefor |
| GB2502392B (en) * | 2012-05-23 | 2017-11-15 | Shenzhen Sunxing Light Alloys Mat Co Ltd | Method for preparing an electrolyte supplement system in aluminium electrolysis |
| CN103160693A (en) * | 2013-03-12 | 2013-06-19 | 焦作万方铝业股份有限公司 | Method for aluminum ash treatment and recycling use |
| CN108728658A (en) * | 2018-06-13 | 2018-11-02 | 广州市盘古机器人科技有限公司 | Hot aluminium harrows slag technology processing system |
| CN110257642A (en) * | 2019-07-01 | 2019-09-20 | 北京科技大学 | A kind of resource utilization method of secondary aluminium alloy ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101619396B (en) | 2011-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103146924B (en) | Multi-stage impurity removing and refining method in production process of secondary aluminum | |
| CN102933494B (en) | Utilize the method for cascade process purifying silicon | |
| CN111333092B (en) | Method for defluorination and cryolite preparation by secondary aluminum ash acid method | |
| CN110423884B (en) | Method for recovering lead from lead plaster of waste lead-acid storage battery | |
| CN102851519A (en) | Novel aluminum refining agent, and preparation method thereof | |
| CN101619396B (en) | Method for directly using aluminum and aluminum alloy ash for electrolytic production and recycling | |
| CN110016557A (en) | The method for producing ferro-silicon-aluminium as raw material electric arc furnace smelting using aluminium ash | |
| CN105695744A (en) | Full-path full-valence separation method for multifarious metal | |
| CN101092668A (en) | Method for producing zinc alloy from zinc dross | |
| CN109055765A (en) | A method of recycling refined bismuth from precious metals containing lead | |
| CN104498726B (en) | A kind of slagging agent with aluminum ash as raw material and preparation method thereof | |
| CN103981369B (en) | Comprehensive recovery process for multiple metals in arsenic-containing soot | |
| CN102021350B (en) | Aluminum de-cinder flux as well as preparation method and application thereof | |
| JP4470689B2 (en) | Indium recovery method using tin smelting | |
| CN110117718A (en) | The method for producing ferro-silicon-aluminium as raw material electric arc furnace smelting using waste refractory materials | |
| CN109371248B (en) | Method for reducing lead content in waste brass | |
| CN110004300B (en) | Method for preparing ferrosilicon alloy by using aluminum ash as raw material through plasma jet feeding | |
| CN113860362B (en) | Electrochemical preparation vanadium removal reagent and titanium tetrachloride vanadium removal method thereof | |
| CN104388686A (en) | Treatment method of soot of copper smelting furnace | |
| CN102515214A (en) | Method for reducing magnesium oxide impurity in solid magnesium chloride | |
| CN107779605A (en) | A kind of method that aluminium is extracted in the ash from aluminium | |
| CN100485064C (en) | Composite heat generating agent in use for producing ferrotitanium | |
| CN110684901B (en) | Method for reducing iron content in waste brass | |
| CN103436919B (en) | A kind of preliminary cleaning method before high-temperature electrolysis aluminium liquid founding and product | |
| CN110029227A (en) | The method for producing ferro-silicon-aluminium as raw material plasma jet feeding using waste refractory materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20140810 |
|
| EXPY | Termination of patent right or utility model |