CN113942994A - Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum - Google Patents
Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum Download PDFInfo
- Publication number
- CN113942994A CN113942994A CN202111245163.2A CN202111245163A CN113942994A CN 113942994 A CN113942994 A CN 113942994A CN 202111245163 A CN202111245163 A CN 202111245163A CN 113942994 A CN113942994 A CN 113942994A
- Authority
- CN
- China
- Prior art keywords
- distillation
- electrolyte
- waste cathode
- separating
- electrolytic aluminum
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 40
- 239000002699 waste material Substances 0.000 title claims abstract description 27
- 239000003792 electrolyte Substances 0.000 title claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000004821 distillation Methods 0.000 claims abstract description 44
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 15
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 14
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 14
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 14
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 4
- 238000000498 ball milling Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 4
- 239000011734 sodium Substances 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 17
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- BXILREUWHCQFES-UHFFFAOYSA-K aluminum;trichloride;hydrochloride Chemical compound [Al+3].Cl.[Cl-].[Cl-].[Cl-] BXILREUWHCQFES-UHFFFAOYSA-K 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000005903 acid hydrolysis reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- -1 fluoride ions Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- IOXPXHVBWFDRGS-UHFFFAOYSA-N hept-6-enal Chemical compound C=CCCCCC=O IOXPXHVBWFDRGS-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/05—Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/22—Preparation in the form of granules, pieces, or other shaped products
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for separating electrolyte from waste cathode carbon blocks of electrolytic aluminum, and relates to the technical field of electrolytic aluminum. The invention comprises the following steps: a. crushing the waste cathode by a crusher, and ball-milling the crushed carbon blocks; b. putting the ball-milled carbon blocks into powder mixing equipment, and adding ammonium bicarbonate to uniformly mix the carbon blocks and the powder; c. mixing ammonium bicarbonate and carbon block, pressing into blocks, and vacuum distilling in a vacuum distillation apparatus; d. after the vacuum distillation equipment finishes distillation, taking out the distillation residue and adding a mixed solution of hydrochloric acid and aluminum chloride; e. mixing the distillation residues with the solution for a certain time, filtering the distillation residues, and washing and drying the distillation residues to obtain a carbonaceous material; and c, controlling the content of ammonium bicarbonate in the step b to be 5%, recovering hydrogen generated in the step d, and recovering the metal sodium and the electrolyte separated after vacuum distillation.
Description
Technical Field
The invention relates to the technical field of electrolytic aluminum, in particular to a method for separating electrolyte from waste cathode carbon blocks of electrolytic aluminum.
Background
As the worldwide aluminum production capacity increases, the amount of waste associated with this industry is also increasing. The treatment of waste cathodes generated during the production of electrolytic aluminum is a serious environmental problem faced by the primary aluminum industry. In the production process of electrolytic aluminum, the carbon cathode is eroded by fluoride ions, sodium ions and the like to be scrapped, so that a large amount of waste cathodes are generated every year. The waste cathode is a dangerous solid waste containing various components, and serious environmental problems are caused when the waste cathode is not properly treated.
At present, the method for treating the waste cathode carbon blocks mainly comprises a beneficiation method and a metallurgical method, wherein the beneficiation method mainly adopts a flotation method, the method adopts various reagents with high price and can generate a large amount of wastewater, the metallurgical method is divided into a wet method and a fire method, the wet method comprises a chemical leaching method, a sulfuric acid hydrolysis method, a lime water soaking method and the like, the fire method mainly comprises a rotary kiln roasting method, a high-temperature hydrolysis method, a bauxite sintering method and the like, the chemical leaching method has long treatment time and complicated leachate treatment, the sulfuric acid hydrolysis method needs to consume a large amount of acid, a large amount of wastewater is generated at the same time, the treatment cost is high, the lime water soaking method has low speed, the reaction is not thorough, the carbonaceous materials are not utilized, and the resource waste is caused.
Disclosure of Invention
The invention aims to develop a method for separating electrolyte from waste cathode carbon blocks of electrolytic aluminum, which can recycle carbonaceous materials.
The invention is realized by the following technical scheme:
a method for separating electrolyte from waste cathode carbon blocks of electrolytic aluminum comprises the following steps:
a. crushing the waste cathode by a crusher, and ball-milling the crushed carbon blocks;
b. putting the ball-milled carbon blocks into powder mixing equipment, and adding ammonium bicarbonate to uniformly mix the carbon blocks and the powder;
c. mixing ammonium bicarbonate and carbon block, pressing into blocks, and vacuum distilling in a vacuum distillation apparatus;
d. after the vacuum distillation equipment finishes distillation, taking out the distillation residue and adding a mixed solution of hydrochloric acid and aluminum chloride;
e. mixing the distillation residues with the solution for a certain time, filtering the distillation residues, and washing and drying the distillation residues to obtain a carbonaceous material;
and c, controlling the content of ammonium bicarbonate in the step b to be 5%, recovering hydrogen generated in the step d, and recovering the metal sodium and the electrolyte separated after vacuum distillation.
Optionally, the distillation temperature of the vacuum distillation equipment in the step c is 1100-1500 ℃.
Optionally, the distillation pressure in the step c is 10-50 Pa.
Optionally, the distillation time in the step c is 2-6 h.
Optionally, after the distillation residue taken out in the step d is cooled, a powder depolymerization beater is used for beating up the distillation residue.
Optionally, in the step d, the distillation residues and the aluminum chloride hydrochloride mixed solution are stirred and mixed by a stirrer, and the two are mixed for 12 hours.
Optionally, sodium hydroxide is added into the solution reacted with the distillation residues in the step e, and the generated precipitate is filtered.
Optionally, the solution is crystallized after filtering and precipitating, and the crystallized sodium chloride is recovered.
The invention has the beneficial effects that:
the ammonium bicarbonate is added as the pore-forming agent, so that the electrolyte can be more fully volatilized, compared with a beneficiation method and a metallurgical method, a large amount of waste water is not generated, the use of the agent is less, the treatment cost is reduced, and the carbon material after being washed and dried can be recycled.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments may be modified in various different ways, without departing from the spirit or scope of the invention.
The invention discloses a method for separating electrolyte from waste cathode carbon blocks of electrolytic aluminum, which comprises the steps of crushing the waste cathode carbon blocks by a crusher, ball-milling the crushed carbon blocks, feeding the ball-milled carbon blocks into powder mixing equipment, adding ammonium bicarbonate to uniformly mix the carbon blocks and the crushed carbon blocks, controlling the content of the ammonium bicarbonate to be 5%, pressing the carbon blocks mixed with the ammonium bicarbonate into blocks, and putting the blocks into vacuum distillation equipment.
The distillation temperature in the vacuum distillation equipment is 1100-1500 ℃, the distillation pressure is 10-50 Pa, and the distillation time is 2-6 h.
When the distillation temperature is low, the saturated vapor pressure of the electrolyte is relatively low, the volatilization rate is relatively slow, the saturated vapor pressure of the electrolyte is increased along with the increase of the distillation temperature, the volatilization rate is increased, and the removal rates of the three elements of sodium, fluorine and aluminum are increased along with the increase of the distillation temperature. The boiling point of carbon is extremely high, carbon is mainly remained in the distillation residues in the vacuum distillation process, the carbon content in the distillation residues is increased along with the rise of the distillation temperature, the weight loss rate reflects the volatilization amount of the electrolyte to a certain extent, and the weight loss rate is gradually increased along with the rise of the temperature, so that the distillation temperature is optimally 1500 ℃.
The waste cathode carbon block mainly comprises carbon with the content of 30-70%, and other components mainly comprise electrolytes such as fluoride and cyanide, wherein the fluoride comprises sodium hexafluoroaluminate, alumina, sodium fluoride, calcium fluoride and the like. The saturated vapor pressure of the fluoride is increased along with the rise of the temperature, the higher the temperature is, the more beneficial the volatilization of the fluoride is, the temperature is within 1300K-1700K, and the saturated vapor pressure of most of the fluoride is more than 100 Pa.
And after vacuum distillation, recovering the separated sodium metal and electrolyte, returning the electrolyte to an electrolytic tank for use, taking out the distillation residues in the vacuum distillation equipment, cooling, scattering the distillation residues by using a powder depolymerization scattering machine, putting the distillation residues into a closed container, adding a mixed solution of hydrochloric acid and aluminum chloride, stirring by using a stirrer, mixing the two solutions for 12 hours, filtering to obtain the distillation residues, and washing and drying the distillation residues to obtain the carbonaceous material. The method comprises the following steps of recovering hydrogen generated in the mixing process of distillation residues and an aluminum chloride hydrochloride mixed solution, reacting hydrochloric acid with aluminum and other metal oxides in the distillation residues to generate water and chloride, effectively promoting calcium fluoride to be dissolved by aluminum chloride, adding sodium hydroxide into the solution after the reaction to neutralize, reacting the sodium hydroxide with the chloride in the solution to generate sodium chloride and hydroxide precipitate, reacting the aluminum chloride with the sodium hydroxide to generate aluminum hydroxide precipitate and sodium chloride, precipitating the calcium fluoride in the solution, precipitating and filtering the solution, and crystallizing and recovering the sodium chloride solution.
Ammonium bicarbonate is added as a pore-forming agent, so that the electrolyte can be more fully volatilized, compared with a beneficiation method and a metallurgical method, a large amount of waste water is not generated, the use of the agent is less, the treatment cost is reduced, and the carbon material after being washed and dried can be recycled.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.
Claims (8)
1. A method for separating electrolyte from waste cathode carbon blocks in electrolytic aluminum is characterized by comprising the following steps:
a. crushing the waste cathode by a crusher, and ball-milling the crushed carbon blocks;
b. putting the ball-milled carbon blocks into powder mixing equipment, and adding ammonium bicarbonate to uniformly mix the carbon blocks and the powder;
c. mixing ammonium bicarbonate and carbon block, pressing into blocks, and vacuum distilling in a vacuum distillation apparatus;
d. after the vacuum distillation equipment finishes distillation, taking out the distillation residue and adding a mixed solution of hydrochloric acid and aluminum chloride;
e. mixing the distillation residues with the solution for a certain time, filtering the distillation residues, and washing and drying the distillation residues to obtain a carbonaceous material;
and c, controlling the content of ammonium bicarbonate in the step b to be 5%, recovering hydrogen generated in the step d, and recovering the metal sodium and the electrolyte separated after vacuum distillation.
2. The method for separating the electrolyte from the waste cathode carbon block of electrolytic aluminum according to claim 1, wherein the distillation temperature of the vacuum distillation equipment in the step c is 1100-1500 ℃.
3. The method for separating the electrolyte from the waste cathode carbon blocks in the electrolytic aluminum production according to claim 1, wherein the distillation pressure of the vacuum distillation equipment in the step c is 10-50 Pa.
4. The method for separating the electrolyte from the waste cathode carbon blocks in the electrolytic aluminum production according to claim 1, wherein the distillation time of the vacuum distillation equipment in the step c is 2-6 h.
5. The method for separating the electrolyte from the waste cathode carbon blocks of the electrolytic aluminum according to claim 1, wherein the distilled residues taken out in the step d are cooled and then broken up by a powder deagglomeration breaker.
6. The method for separating the electrolyte from the waste cathode carbon block of electrolytic aluminum according to claim 1, wherein the distillation residue and the mixed solution of aluminum chloride hydrochloride are stirred and mixed by a stirrer in the step d, and the two are mixed for 12 hours.
7. The method for separating the electrolyte from the waste cathode carbon block of electrolytic aluminum according to claim 1, wherein sodium hydroxide is added into the solution after the reaction with the distillation residues in the step e, and the generated precipitate is filtered.
8. The method for separating the electrolyte from the waste cathode carbon block of the electrolytic aluminum according to claim 7, wherein the solution is crystallized after filtering and precipitating, and the crystallized sodium chloride is recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245163.2A CN113942994A (en) | 2021-10-26 | 2021-10-26 | Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111245163.2A CN113942994A (en) | 2021-10-26 | 2021-10-26 | Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113942994A true CN113942994A (en) | 2022-01-18 |
Family
ID=79332618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111245163.2A Pending CN113942994A (en) | 2021-10-26 | 2021-10-26 | Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113942994A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115318396A (en) * | 2022-07-20 | 2022-11-11 | 阿坝铝厂 | Waste cathode carbon block crushing equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894600A (en) * | 2015-05-25 | 2015-09-09 | 东北大学 | Method for separating and recovering carbon and electrolytic constituents from aluminum molten salt electrolysis carbon-containing solid wastes |
| CN109437149A (en) * | 2018-11-30 | 2019-03-08 | 东北大学 | A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block |
| CN110129506A (en) * | 2019-05-15 | 2019-08-16 | 东北大学 | The method that AL-Si-Fe alloy is produced in waste refractory materials pretreatment carbon thermal reduction |
| CN110240162A (en) * | 2019-08-05 | 2019-09-17 | 绿业中试低碳科技（镇江）有限公司 | The preparation method of aluminium electroloysis waste carbon-based porous charcoal |
-
2021
- 2021-10-26 CN CN202111245163.2A patent/CN113942994A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104894600A (en) * | 2015-05-25 | 2015-09-09 | 东北大学 | Method for separating and recovering carbon and electrolytic constituents from aluminum molten salt electrolysis carbon-containing solid wastes |
| CN109437149A (en) * | 2018-11-30 | 2019-03-08 | 东北大学 | A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block |
| CN110129506A (en) * | 2019-05-15 | 2019-08-16 | 东北大学 | The method that AL-Si-Fe alloy is produced in waste refractory materials pretreatment carbon thermal reduction |
| CN110240162A (en) * | 2019-08-05 | 2019-09-17 | 绿业中试低碳科技（镇江）有限公司 | The preparation method of aluminium electroloysis waste carbon-based porous charcoal |
Non-Patent Citations (2)
| Title |
|---|
| WANG YAOWU 等: "Separation and Recycling of Spent Carbon Cathode Blocks in the Aluminum Industry by the Vacuum Distillation Process", 《JOM》 * |
| 罗铭洋等: "真空蒸馏电解铝废旧阴极炭块分离碳和电解质", 《有色金属工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115318396A (en) * | 2022-07-20 | 2022-11-11 | 阿坝铝厂 | Waste cathode carbon block crushing equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU667606B2 (en) | Recycling of spent pot linings | |
| CN106077040B (en) | A kind of method of ultrasonic wave auxiliary alkali leaching process aluminum electrolytic waste and old cathode carbon block | |
| CN107282598A (en) | A kind of aluminium cell discards the recoverying and utilizing method of cathode carbon pieces | |
| HU231461B1 (en) | Method for recycling iron and aluminium in nickel-cobalt-manganese solution | |
| CN114875250B (en) | Method for purifying lithium from lithium-containing clay | |
| CA2644092A1 (en) | Extraction of lithium from lithium bearing minerals by caustic leaching | |
| CN111485252B (en) | Dry method for treating fluorine-containing material for recycling | |
| CN107739840A (en) | A kind of method of efficient-decomposition recovering rare earth electrolysis fused salt waste residue middle rare earth | |
| CN111940460A (en) | Aluminum ash final ash low-temperature catalytic denitrification method | |
| CN109911909B (en) | Recovery processing method of waste sagger in preparation process of lithium cobaltate positive electrode material | |
| CN113501536A (en) | Method for preparing aluminum fluoride product by multi-waste combined treatment and aluminum fluoride product | |
| CN113072089B (en) | Method for recovering cryolite by combined treatment of aluminum electrolysis overhaul slag and aluminum ash | |
| CN113942994A (en) | Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum | |
| CN116814957A (en) | Method for synchronously decyanating overhaul slag and extracting lithium | |
| CN110453098A (en) | Rare Earth Electrolysis fused salt waste residue synthetical recovery rare-earth process | |
| CN109133028A (en) | A method of electrolytic cell waste cathode carbon block recycling is disposed with alkaline process | |
| CN211284484U (en) | Comprehensive treatment device for recovering fluorine in fluorine-containing waste material | |
| AU2023222920A1 (en) | Method for removing halide from waelz oxide | |
| CN115028151B (en) | Comprehensive utilization method of secondary aluminum ash | |
| CN115572083A (en) | Aluminum ash resource utilization process and cement clinker | |
| CN115369416A (en) | Method for separating and recovering tellurium and copper from copper telluride slag | |
| CN114888036A (en) | Method for cooperative recycling of aluminum electrolysis overhaul slag and mining and metallurgy waste slag | |
| CN110938838B (en) | Method for treating anode carbon slag of aluminum electrolysis cell by using NaCl molten salt extraction method | |
| KR102319523B1 (en) | Separation and recovery of valuable metals from desulfurized waste catalyst | |
| CN110775955B (en) | Method for treating anode carbon slag of aluminum electrolysis cell by using NaOH molten salt method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220118 |
|
| RJ01 | Rejection of invention patent application after publication |