CN102011148B - Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte - Google Patents
Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte Download PDFInfo
- Publication number
- CN102011148B CN102011148B CN2010105692886A CN201010569288A CN102011148B CN 102011148 B CN102011148 B CN 102011148B CN 2010105692886 A CN2010105692886 A CN 2010105692886A CN 201010569288 A CN201010569288 A CN 201010569288A CN 102011148 B CN102011148 B CN 102011148B
- Authority
- CN
- China
- Prior art keywords
- electrolyte
- carbon residue
- breeze
- recovery
- ionogen
- 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.)
- Active
Links
Images
Abstract
The invention discloses a method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte. The method comprises that: the anode carbon residue from an electrolytic cell is directly thrown into a power-saving holding furnace for smelting, and after a carbon material is completely combusted, the electrolyte completely forms an electrolyte melt; flue gas generated in the smelting process is introduced into an electrolysis series flue gas purification system, and fluoride gases are absorbed by alumina and returned to an electrolytic cell; the electrolyte melt directly enters the electrolytic cell for use or is cooled and ground for baking start-up of the electrolytic cell; and continuous feeding and continuous discharging are realized in the whole production process. The invention realizes innocent treatment of the anode carbon residue and comprehensive recycling of the electrolyte, and overcomes the defects that the carbon residue is needed to be crushed, ground and briquetted, various additives are needed to be added and environmentally-friendly treatment cannot be realized and the like in the prior art. The method is simple in technology, high in electrolyte recovery, low in production treatment cost and obvious in environment-friendly effects and economic benefits, and can realize harmlessness of the carbon residue after treatment.
Description
Technical field
The present invention relates to technical field of aluminum electrolysis, the method that specifically harmless treatment of anode breeze and ionogen are recycled in the aluminium electrolysis process.
Background technology
In the aluminium electrolysis process, because of anode carbon block receives electrolytical washing away the slag phenomenon appears falling.Breeze influences the normal operation of electrolysis of aluminum and needs irregularly from electrolyzer, to salvage.Owing to receive electrolytical immersion and infiltration, contain a large amount of ionogen in the breeze, according to the related data introduction, contain sodium 13.81% in the breeze, contain aluminium 8.42%, fluorine-containing 29.61%.Electrolytical content is about 58% in the general breeze.According to 1,600 ten thousand tons of calculating of present national electrolytic aluminum production capacity, will produce about 160,000 tons breeze every year, will lose about 90,000 tons of ionogen, with 4000 yuan of/ton calculating per ton, lose nearly 3.6 hundred million yuan.Therefore breeze is a considerable resource.The present breeze that produced of domestic majority electrolytic aluminium factory, the overwhelming majority's uses that act as a fuel, its contained ionogen also all gets into lime-ash, not only makes the fluorochemical in the breeze that environment is caused very big influence, and the while has also been wasted and has been worth considerable ionogen.The another kind of processing is to abandon as the waste heap, and the poisonous fluoride dissolution in the breeze permeates the ground in water, polluted water, or be meal and spread in the air, environment is polluted equally.If can the breeze comprehensive reutilization be turned waste into wealth, then open up a new approach for the recycling economy development of aluminium technology.
For many years, a lot of units are all at the recoverying and utilizing method of studying the anode breeze.The patent aluminium electrolysis anode breeze that the big equality people of relaxing applies for and the harmless treatment and the comprehensive utilization method (patent No. is 01138204.X, and date of declaration is November 20 calendar year 2001) of waste cathode material.This invention relates to a kind of harmless treatment and comprehensive utilization method to the anode breeze in the electrolysis of aluminum industry; Concrete technical scheme is that the anode breeze is pulverized; Carry out flotation separation behind the abrasive dust; The powdered carbon of gained is used to produce high carbon product as powder, and the gained ionogen returns in the aluminum electrolysis process and uses.But this method ionogen recovery is low, and ionogen purity is low, and foreign matter content is high, and technical process is complicated, and cost is higher, causes secondary pollution easily, so seldom adopt in the industry.
Summary of the invention
The present invention is directed to the deficiency that aluminum current electrolysis industry ionogen recovery technology exists, take into full account industry and go up the feasibility of implementing, a kind of method that realizes that harmless treatment of aluminium electrolysis anode breeze and ionogen reclaim is provided; It is workable; Technology is simple, and the recovery is high, and cost recovery is low.
Solving the technical scheme that technical problem of the present invention adopts is: the anode breeze that produces in the aluminium electrolysis process carries out pyrometallurgical smelting in the economize on electricity holding furnace; Carbonaceous material perfect combustion under 800～1500 ℃ temperature in melting to the breeze, the ionogen in the breeze is completed into the melt ionogen; The flue gas that produces in the fusion process (mainly contains CO, CO
2, fluorochemical etc.) insert the electrolytic system flue gas purification system, absorb the evaporable fluorochemical with aluminum oxide and return electrolyzer and use, the melt ionogen of recovery directly gets into electrolyzer use or cooling after levigate processing is used for the roasting and starting of electrolyzer.Whole process realizes continuous production, i.e. continuously feeding and discharging continuously.
Major technology condition of the present invention is:
(1) major equipment is the economize on electricity holding furnace in the fusion process, and the temperature of reaction in the fusion process is 800-1500 ℃.
(2) the economize on electricity holding furnace has been realized continuous operation, i.e. continuously feeding, discharging continuously.
(3) electrolyte melt and the fluoride gas of reaction generation return electrolytic system again.
(4) breeze can be powdery, bulk, spherical, need not can be added directly in the electric furnace through pulverization process.
The invention has the beneficial effects as follows: the anode breeze directly adds economize on electricity and carries out melting in the holding furnace, and ionogen becomes melt state fully, and has realized the harmless treatment and the electrolytical effective recycling of breeze.This technical process is short, and cost recovery is low, and is workable, and environmental pollution is little, and breeze is realized complete harmless treatment, environmental benefit and remarkable in economical benefits.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1:
Anode breeze 624kg on from aluminium cell, salvaging adds in the economize on electricity holding furnace; Be heated to 800 ℃, make combustiblematerials perfect combustion in the breeze, treat that ionogen in the breeze is completed into melt after; From the economize on electricity holding furnace, emit; And add breeze continuously, and the fluorochemical that discharges in the fusion process inserts the electrolysis flue gas purification system and recycles, and ionogen has obtained innoxious recovery.
Result of implementation: melting is reclaimed and is obtained ionogen 340kg, in the electrolyte ingredient: F:40.9%; Al
2O
3: 28.37%; Na
2O:19.8%; CaO:2.0%, foreign matter content satisfy electrolytical requirement.
Embodiment 2:
Anode breeze 856kg on from aluminium cell, salvaging adds in the economize on electricity holding furnace; Be heated to 1500 ℃, make combustiblematerials perfect combustion in the breeze, treat that ionogen in the breeze is completed into melt after; From the economize on electricity holding furnace, emit; And add breeze continuously, and the fluorochemical that discharges in the fusion process inserts the electrolysis flue gas purification system and recycles, and ionogen has obtained innoxious recovery.
Result of implementation: melting is reclaimed and is obtained ionogen 435kg, in the electrolyte ingredient: F:42.97%; Al
2O
3: 27.37%; Na
2O:20.5%; CaO:2.5%, foreign matter content satisfy electrolytical requirement.
Embodiment 3:
Anode breeze 424kg on from aluminium cell, salvaging adds in the economize on electricity holding furnace; Be heated to 1200 ℃, make combustiblematerials perfect combustion in the breeze, treat that ionogen in the breeze is completed into melt after; From the economize on electricity holding furnace, emit; And add breeze continuously, and the fluorochemical that discharges in the fusion process inserts the electrolysis flue gas purification system and recycles, and ionogen has obtained innoxious recovery.
Result of implementation: melting is reclaimed and is obtained ionogen 219kg, in the electrolyte ingredient: F:40.97%; Al
2O
3: 29.37%; Na
2O:21.5%; CaO:3.5%, foreign matter content satisfy electrolytical requirement.
Claims (1)
1. the method that reclaims of aluminium electrolysis anode breeze harmless treatment and ionogen; It is characterized in that: the anode breeze of pulling out in the electrolyzer directly drops in the economize on electricity holding furnace and carries out melting; Carbonaceous material is through after the perfect combustion, and ionogen is completed into electrolyte melt; The flue gas that produces in the fusion process inserts the electrolytic series flue gas purification system, and fluoride gas returns to electrolyzer after adopting aluminum oxide to absorb, and electrolyte melt directly gets into electrolyzer use or cooling after be used for the roasting and starting of electrolyzer after the levigate processing; Temperature in the fusion process is 1200 or 1500 ℃, material, the discharging continuously of advancing of going forward side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105692886A CN102011148B (en) | 2010-12-02 | 2010-12-02 | Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105692886A CN102011148B (en) | 2010-12-02 | 2010-12-02 | Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102011148A CN102011148A (en) | 2011-04-13 |
| CN102011148B true CN102011148B (en) | 2012-07-04 |
Family
ID=43841471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105692886A Active CN102011148B (en) | 2010-12-02 | 2010-12-02 | Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102011148B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389891A (en) * | 2011-09-30 | 2012-03-28 | 巨锋 | Electrolytic aluminum anode waste separating and recovering method |
| CN102828203B (en) * | 2012-08-21 | 2015-04-01 | 沈阳化工大学 | Method for purifying flue gas in aluminum electrolysis production |
| CN102989744B (en) * | 2012-12-04 | 2017-04-19 | 周俊和 | Method for recycling mixed material dreg of overhauling groove slag of electrolytic cell |
| CN103302079B (en) * | 2013-06-20 | 2015-06-10 | 郑州经纬科技实业有限公司 | Comprehensive treatment and utilization method of aluminum smelting fluorine-carbon hazardous solid wastes |
| CN105463506B (en) * | 2016-01-13 | 2017-07-28 | 重庆大学 | A kind of method for separating and recovering electrolyte and carbon in aluminium electrolyte anodic carbon residue |
| CN106345794A (en) * | 2016-11-03 | 2017-01-25 | 四川长虹电器股份有限公司 | Waste circuit board microwave anaerobic splitting treatment method |
| CN108611663A (en) * | 2018-08-03 | 2018-10-02 | 河南亿安设备科技有限公司 | A kind of electrolyte recovery system and method |
| CN109650343A (en) * | 2018-11-21 | 2019-04-19 | 国家电投集团宁夏能源铝业科技工程有限公司 | A kind of high temperature purification method of fluoride salt in anodic carbon residue |
| CN111850608A (en) * | 2019-04-26 | 2020-10-30 | 沈阳铝镁设计研究院有限公司 | Method for recovering electrolyte by pyrogenic roasting of electrolytic aluminum carbon slag |
| CN110144602A (en) * | 2019-06-04 | 2019-08-20 | 甘肃东兴铝业有限公司 | A kind of carbon slag in Aluminium electrolysis treatment process |
| CN111551027A (en) * | 2020-05-22 | 2020-08-18 | 中铝郑州有色金属研究院有限公司 | Smelting furnace and smelting method for recycling electrolyte from aluminum electrolysis carbon slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160808A (en) * | 1978-05-30 | 1979-07-10 | Andersen John N | Pyrohydrolysis process for spent aluminum reduction cell linings |
| US4355017A (en) * | 1981-05-14 | 1982-10-19 | Martin Marietta Corporation | Aluminum electrolytic cell cathode waste recovery |
| CN1587028A (en) * | 2004-07-22 | 2005-03-02 | 中国铝业股份有限公司 | Process for recovering fluoride salt from aluminium electrolyzing carbon slag |
| CN101063215A (en) * | 2007-05-31 | 2007-10-31 | 中国铝业股份有限公司 | Method for extracting electrolyte in aluminum electrolytic anodic carbon residue |
-
2010
- 2010-12-02 CN CN2010105692886A patent/CN102011148B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160808A (en) * | 1978-05-30 | 1979-07-10 | Andersen John N | Pyrohydrolysis process for spent aluminum reduction cell linings |
| US4355017A (en) * | 1981-05-14 | 1982-10-19 | Martin Marietta Corporation | Aluminum electrolytic cell cathode waste recovery |
| CN1587028A (en) * | 2004-07-22 | 2005-03-02 | 中国铝业股份有限公司 | Process for recovering fluoride salt from aluminium electrolyzing carbon slag |
| CN101063215A (en) * | 2007-05-31 | 2007-10-31 | 中国铝业股份有限公司 | Method for extracting electrolyte in aluminum electrolytic anodic carbon residue |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102011148A (en) | 2011-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102011148B (en) | Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte | |
| Tian et al. | Recycling of spent Lithium-ion Batteries: A comprehensive review for identification of main challenges and future research trends | |
| Zhang et al. | A critical review on secondary lead recycling technology and its prospect | |
| Sun et al. | Spent lead-acid battery recycling in China–A review and sustainable analyses on mass flow of lead | |
| CN106086415B (en) | The complete set of equipments and method of noble metal are refined in a kind of board waste material from circuit | |
| CN106086416B (en) | A kind of technology that wiring board waste disposal utilizes | |
| CN101811695B (en) | Method for recovering graphite from electrolytic aluminum waste cathode carbon block | |
| CN101829670B (en) | Method for recovering carbon from electrolytic aluminum waste cathode carbon block | |
| EP2312686A1 (en) | Method for implementing full cycle regeneration of waste lead acid battery | |
| CN103343363B (en) | The electrolytical production method of a kind of electrolgtic aluminium | |
| CN103555955A (en) | Resource utilization method of aluminum ash | |
| CN110016557B (en) | Method for preparing ferro-silicon-aluminum by smelting aluminum ash serving as raw material in electric arc furnace | |
| CN110144457B (en) | Method for preparing aluminum-silicon-iron alloy by carbon thermal reduction of aluminum ash pretreatment | |
| Zhang | The current status on the recycling of lead-acid batteries in China | |
| CN109913911A (en) | The processing method of alumina-silica solid waste in a kind of aluminum cell waste liner | |
| Zhao et al. | Recycling and utilization of spent potlining by different high temperature treatments | |
| CN108172923B (en) | Treatment system of waste lithium ion battery | |
| CN110129506B (en) | Method for preparing ferro-silicon-aluminum alloy by carbon thermal reduction of waste refractory material pretreatment | |
| CN107623152A (en) | Applying waste lithium ionic electrokinetic cell resource recycle method | |
| CN204074682U (en) | A kind of old circuit board plasma treatment energy effect system | |
| CN110129565B (en) | Method for preparing ferrosilicon alloy by feeding aluminum ash as raw material through hollow electrode | |
| CN112195343A (en) | Lithium battery recycling method and system | |
| CN104087761A (en) | Secondary lead smelting method | |
| CN102989744A (en) | Method for recycling mixed material dreg of overhauling groove slag of electrolytic cell | |
| CN107604383A (en) | A kind of method of electrolyte in smelting process extraction carbon slag |
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 |