CN1785537A - Treatment method of aluminium electrolytic bath waste cathode carbon blook innocuousnes - Google Patents
Treatment method of aluminium electrolytic bath waste cathode carbon blook innocuousnes Download PDFInfo
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- CN1785537A CN1785537A CN 200510124019 CN200510124019A CN1785537A CN 1785537 A CN1785537 A CN 1785537A CN 200510124019 CN200510124019 CN 200510124019 CN 200510124019 A CN200510124019 A CN 200510124019A CN 1785537 A CN1785537 A CN 1785537A
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- cathode carbon
- waste cathode
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- aluminum electrolytic
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 46
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000002699 waste material Substances 0.000 title claims description 67
- 239000004411 aluminium Substances 0.000 title abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 24
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 12
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 10
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 10
- 239000004571 lime Substances 0.000 claims abstract description 10
- 239000010883 coal ash Substances 0.000 claims abstract description 7
- 239000000706 filtrate Substances 0.000 claims description 28
- 239000007790 solid phase Substances 0.000 claims description 25
- 238000000354 decomposition reaction Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 13
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 239000000047 product Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 5
- 239000002440 industrial waste Substances 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000010884 boiler slag Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 11
- 229910052681 coesite Inorganic materials 0.000 abstract description 10
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 10
- 239000000377 silicon dioxide Substances 0.000 abstract description 10
- 229910052682 stishovite Inorganic materials 0.000 abstract description 10
- 229910052905 tridymite Inorganic materials 0.000 abstract description 10
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract description 9
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 abstract description 4
- 238000001354 calcination Methods 0.000 abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 15
- 150000004673 fluoride salts Chemical class 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910052925 anhydrite Inorganic materials 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 5
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000003818 cinder Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000007809 chemical reaction catalyst Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 239000012628 flowing agent Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Processing Of Solid Wastes (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
A process for treating the used cathode carbon block of aluminium electrolyzer without environmental pollution includes such steps as calcining it in conjunction with the powdered coal ash rich in SiO2 and Al2O3, and ordinary-temp decomposing by sulfuric acid and lime to obtain AlF3, the material containing CaF2, SiO2 and Al2O3, and NaOH solution.
Description
Technical Field
A harmless treatment method for waste cathode carbon blocks of an aluminum electrolytic cell relates to a harmless treatment process for carbon cathode parts of waste lining materials in the process of producing metal aluminum by electrolysis, in particular to all carbon cathode materials (excluding refractory materials) including waste bottom carbon blocks, waste side carbon blocks and waste cathode paste.
Background
The waste tank lining produced in the electrolytic aluminum production process contains a large amount of soluble fluoride and cyanide, is directly stacked in the open air to pollute the atmosphere, is mixed into rivers along with rainwater to pollute surface water sources, permeates underground to pollute underground water, is buried for treatment to pollute soil, and seriously harms human health and animal and plant growth. The problem of contamination of scrap box liners has become one of the major issues affecting the overall harmonious sustainable development of the aluminum industry.
At present, the reported treatment methods of the waste cathode carbon block include a flotation method and a sulfuric acid decomposition method, the technical essence is a wet process, partial fluoride salt and carbon powder can be recovered duringthe treatment, and the technical problems are as follows: (1) the cyanide could not be removed; (2) cyanide and partial fluoride are transferred into the solution to cause secondary pollution, and waste liquid cannot reach the standard and is discharged. Therefore, the flotation method and the sulfuric acid decomposition method cannot really make the waste cathode carbon block completely harmless. The invention relates to a harmless treatment method of an aluminum electrolysis cell waste cell lining, which is an invention patent with the application number of 200410042564.8, namely the harmless treatment method of the aluminum electrolysis cell waste cell lining, has good harmless effect on the waste cell lining, can effectively treat the waste cell lining, and obtains benign solid slag.
Because the waste cathode carbon block has the characteristic of being composed of C and fluoride salt, the prior art does not effectively recycle the fluoride salt with high added value in the waste cathode carbon block or can not effectively make the waste cathode carbon block harmless when the waste cathode carbon block is completely harmless, thereby influencing the comprehensive effect of harmless treatment of the waste cathode carbon block.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a harmless treatment method of waste cathode carbon blocks, which can completely make the waste cathode carbon blocks harmless, can effectively recover fluoride salt with high added value in the waste cathode carbon blocks and is easy to industrially implement, aiming at the characteristic that the waste cathode carbon blocks mainly consist of C and fluoride salt.
The purpose of the invention is realized by the following technical scheme.
A method for harmlessly treatingwaste cathode carbon blocks of an aluminum electrolytic cell is characterized in that the treatment process comprises the steps of roasting the waste cathode carbon blocks of the aluminum electrolytic cell and then carrying out wet decomposition treatment.
A harmless treatment method for waste cathode carbon blocks of an aluminum electrolytic cell is characterized in that the roasting treatment process isCrushing waste cathode carbon blocks including waste bottom blocks, waste side blocks and waste cathode paste into particles with the particle size of less than 2 mm; then adding SiO-rich carbon powder which accounts for 1-50% of the weight of the waste cathode carbon block2And Al2O3The industrial waste is roasted for 50 to 150 minutes at the temperature of 600 to 800 ℃.
A method for harmlessly treating waste cathode carbon blocks of an aluminum electrolytic cell is characterized in that in the wet decomposition process, roasted products are ground to a particle size of less than 0.074 mm; adding the mixture into a sulfuric acid reaction tank with the concentration of 5-50%, reacting for 10-60 minutes, adsorbing HF gas generated by the reaction by using aluminum hydroxide, and filtering to obtain primary filtrate and a primary solid phase; adding lime with the weight ratio of 1-20% into the primary filtrate, reacting for 10-60 minutes, and filtering to obtain secondary filtrate and a secondary solid phase.
A harmless treatment method for waste cathode carbon blocks of aluminum electrolytic cells is characterized in that SiO-rich carbon blocks which are added in a roasting reaction2And Al2O3The industrial waste is fly ash.
A process for treating the waste cathode carbon blocks of aluminium electrolyzer without pollution features that the powdered coal ash used in calcining reaction may be one or the mixture of boiler cinder, power plant coal ash and gas generator cinder, and its granularity is less than 2 mm. It is generally required to formulate SiO in the composition of the material2Content (wt.)＞30％，Al2O3The content is more than 10 percent.
The invention relates to a harmless treatment method of waste cathode carbon blocks of an aluminum electrolytic cell, which mainly comprises the following reaction in the sulfuric acid decomposition process: . The primary solid phase comprises CaF as main component2、SiO2And Al2O3It can be used as raw material or reaction catalyst for producing cement and refractory material. The primary filtrate mainly contains NaF and Na2SO4And Al2(SO4)3. The generated HF finally generates AlF which is a high value-added product3About 150 kg of AlF can be obtained by treating 1 ton of waste cathode carbon block3(the specific amount is determined by the fluoride salt content in the waste cathode carbon block), and can be sold as a commodity.
The invention relates to a harmless treatment method of waste cathode carbon blocks of an aluminum electrolytic cell, which mainly comprises the following reaction steps in the process of adding lime to carry out alkali decomposition: . The secondary solid phase comprises CaF as main component2And a small amount of CaSO4It can be used as raw material of cement and refractory material or reaction catalyst. The secondary filtrate is NaOH solution with higher concentration, and can be used as raw materials for producing soda ash and aluminum hydroxide.
A process for treating the waste cathode carbon blocks of aluminium electrolyzer without pollution features that the calcining process is performed in a counter-current rotary equipment or a suspension calcining furnace, and the heat value of carbon material is used to remove the damage of cyanide.
The method takes the waste cathode carbon block as the raw material and takes the carbon block rich in SiO2And Al2O3The material is a reaction dispersant, the roasting treatment is carried out after the uniform mixing, the roasted material is ground, the sulfuric acid and the lime are added for the normal temperature decomposition treatment, and the final product is AlF3NaOH solution and CaF-containing solution2、SiO2And Al2O3And (3) feeding. The pollution of waste cathode carbon blocks is eliminated after treatment, and aluminum fluoride, NaOH solution and CaF-containing solution2、SiO2And Al2O3The material can be sold as a commodity.
The method for harmlessly treating the waste cathode carbon block of the aluminum electrolytic cell fully utilizes the heat value of the carbon material during roasting, and acid and alkali decomposition during wet decomposition is carried out at normal temperature. Low energy consumption and easy operation.
The harmless treatment method of the waste cathode carbon block has the advantages of advanced process, reliable technology, low treatment cost and easy industrialization. The treated waste cathode carbon blocks can be completely harmless, fluoride salt contained in the waste cathode carbon blocks can be effectively recovered, and the economic benefit and the environmental benefit are obvious.
Detailed Description
A method for harmlessly treating the waste cathode carbon blocks of an aluminum electrolytic cell comprises the steps of roasting the waste cathode carbon blocks of the aluminum electrolytic cell, and then carrying out wet decomposition treatment. The roasting treatment process is that the waste cathode carbon blocks including the waste bottom blocks, the waste side blocks and the waste cathode paste are crushed into particles with the diameter less than 2 mm; then adding SiO-rich carbon powder which accounts for 1-50% of the weight of the waste cathode carbon block2And Al2O3The materials are evenly mixed and then are roasted for 50 to 150 minutes in a counter-current rotating device or a suspension roasting furnace at the temperature of 600 to 800 ℃. The wet decomposition process is that the roasted product is ground to the granularity of less than 0.074mm, added into a sulfuric acid reaction tank with the volume concentration of 5-50 percent, and reacted for 10-60 minutes by absorbing HF gas generated by reaction with aluminum hydroxide, and then filtered to obtain primary filtrate and primary solid phase; adding lime with the weight ratio of 1-20% into the primary filtrate, reacting for 10-60 minutes, and filtering to obtain secondary filtrate and a secondary solid phase; the obtained primary solid phase and secondary solid phase are dried and sold, and the secondary filtrate can be directly sold.
The process of the present invention is further illustrated below with reference to examples.
Example 1
1000 g of waste cathode carbon blocks are added into the raw materials for roasting treatment in a particle form smaller than 2 mm; 100 g of boiler coal slag is added and added in a particle form of less than 2 mm; the two materials are mixed evenly and added into a rotary kiln, and the roasting temperature is 600 ℃ and the time is 150 minutes. After roastingThe material is decomposed by sulfuric acid with the volume concentration of 50 percent, and the obtained HF gas is absorbed and converted into AlF product with high added value by aluminum hydroxide3Filtering the obtained solution to obtain primary filtrate and a primary solid phase, adding 5% lime into the primary filtrate to perform decomposition reaction for 50 minutes to obtain secondary filtrate and a secondary solid phase, and sending the secondary filtrate to the aluminum hydroxide production flow. Analyzed, the primary solid phase contains CaF226.3％、SiO265.1 percent of the total weight of the cement can be directly used as a raw material for cement production; secondary solid phase containing CaF290.3％、CaSO46.5 percent, can be directly used as a catalyst for cement sintering.
Example 2
1000 g of waste cathode carbon blocks are added into the raw materials for roasting treatment in a particle form smaller than 2 mm; adding 500 g of power plant coal ash, and adding the power plant coal ash in a particle form of less than 2 mm; the two materials are mixed evenly and added into a rotary kiln, and the roasting temperature is 700 ℃ and the roasting time is 120 minutes. Decomposing the roasted material with 35% sulfuric acid, and converting the obtained HF gas into AlF product with high added value through aluminum hydroxide adsorption3Filtering the obtained solution to obtain a primary filtrate and a primary solid phase, adding 1% lime into the primary filtrate for decomposition reaction for 60 minutes to obtain a secondary filtrate and a secondary solid phaseAnd sending the secondary filtrate to the production flow of the sodium carbonate. Analyzed, the primary solid phase contains CaF215.6％、SiO270.3 percent of the total weight of the raw materials can be directly used as raw materials for producing refractory materials; secondary solid phase containing CaF288.1％、CaSO49.5 percent, can be directly used as a catalyst for sintering refractory materials.
Example 3
1000 g of waste cathode carbon blocks are added into the roasting treatment raw materials, 150 g of the mixture of coal slag of the gas producer and coal slag of the boiler is added in the form of particles smaller than 2mm, and the mixture is added in the form of particles smaller than 2 mm; the two materials are mixed evenly and added into a suspension roasting furnace, and the roasting temperature is 750 ℃. Decomposing the roasted material with 5% sulfuric acid, and converting the obtained HF gas into AlF product with high added value through aluminum hydroxide adsorption3Filtering the obtained solution to obtain a primary filtrate and a primary solid phase, adding 20% lime into the primary filtrate for decomposition reaction for 10 minutes to obtain a secondary filtrate and a secondary solid phase, and sending the secondary filtrate to aluminum hydroxide productionAnd (5) carrying out the process. Analyzed, the primary solid phase contains CaF210.4％、SiO270.1 percent of the total weight of the raw materials can be used as raw materials in the brick making industry; secondary solid phase containing CaF289.9％、CaSO48.5 percent of the total weight of the slag-forming agent can be used as a flowing agent and a slag-forming agent for steel production.
Example 4
1000 g of waste cathode carbon blocks are added into the roasting treatment raw materials, 250 g of the mixture of coal gas producer cinder and power plant coal ash is added in a particle form of less than 2mm, and the mixture is added in a particle form of less than 2 mm; the two materials are mixed evenly and added into a suspension roasting furnace, and the roasting temperature is 800 ℃. Decomposing the roasted material with 5% sulfuric acid, and convertingthe obtained HF gas into AlF product with high added value through aluminum hydroxide adsorption3Filtering the obtained solution to obtain a primary filtrate and a primary solid phase, adding lime with the weight ratio of 10% into the primary filtrate for decomposition reaction for 20 minutes to obtain a secondary filtrate and a secondary solid phase, and sending the secondary filtrate to the production flow of the aluminum hydroxide. Analyzed, the primary solid phase contains CaF211.5％、SiO270.1 percent of the total weight of the raw materials can be used as raw materials in the brick making industry; secondary solid phase containing CaF289.6％、CaSO48.7 percent of the total weight of the slag-forming agent can be used as a flowing agent and a slag-forming agent for steel production.
Claims (5)
1. A method for harmlessly treating waste cathode carbon blocks of an aluminum electrolytic cell is characterized in that the treatment process comprises the steps of roasting the waste cathode carbon blocks of the aluminum electrolytic cell and then carrying out wet decomposition treatment.
2. The method for harmlessly treating the waste cathode carbon blocks of the aluminum electrolytic cell according to claim 1, wherein the roasting treatment process comprises the steps of crushing the waste cathode carbon blocks including the waste bottom blocks, the waste side blocks and the waste cathode paste into particles with the diameter of less than 2 mm; then adding SiO-rich carbon powder which accounts for 1-50% of the weight of the waste cathode carbon block2And Al2O3The industrial waste is roasted for 50 to 150 minutes at the temperature of 600 to 800 ℃.
3. The method for harmlessly treating the waste cathode carbon block of the aluminum electrolytic cell according to claim 1, wherein the wet decomposition process comprises grinding the roasted product to a particle size of less than 0.074 mm; adding the mixture into a sulfuric acid reaction tank with the concentration of 5-50%, reacting for 10-60 minutes, adsorbing HF gas generated by the reaction by using aluminum hydroxide, and filtering to obtain primary filtrate and a primary solid phase; adding lime with the weight ratio of 1-20% into the primary filtrate, reacting for 10-60 minutes, and filtering to obtain secondary filtrate and a secondary solid phase.
4. The method for the harmless treatment of the waste cathode carbon block of the aluminum electrolytic cell according to claim 1, wherein the SiO-rich carbon block added in the roasting reaction2And Al2O3The industrial waste is fly ash.
5. The method for harmlessly treating the waste cathode carbon block of the aluminum electrolytic cell according to claim 1, wherein the fly ash blended in the roasting reaction is one or a mixture of boiler slag, power plant coal ash or coal gas producer slag, and the particle size is less than 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101240198A CN100542702C (en) | 2005-11-28 | 2005-11-28 | The innoxious processing method of a kind of waste cathode of aluminum electrolytic cell charcoal piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101240198A CN100542702C (en) | 2005-11-28 | 2005-11-28 | The innoxious processing method of a kind of waste cathode of aluminum electrolytic cell charcoal piece |
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| Publication Number | Publication Date |
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| CN1785537A true CN1785537A (en) | 2006-06-14 |
| CN100542702C CN100542702C (en) | 2009-09-23 |
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| CNB2005101240198A Active CN100542702C (en) | 2005-11-28 | 2005-11-28 | The innoxious processing method of a kind of waste cathode of aluminum electrolytic cell charcoal piece |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100522398C (en) * | 2006-06-22 | 2009-08-05 | 中国铝业股份有限公司 | Treatment of aluminum electrolytic cell waste refractory materials |
| CN100577885C (en) * | 2007-12-17 | 2010-01-06 | 中国铝业股份有限公司 | Method for reclaiming electrolyte in carbon dross of aluminium electrolysis |
| CN101054693B (en) * | 2007-05-31 | 2010-05-26 | 中国铝业股份有限公司 | Method of extracting electrolyte from waste cathode carbon block of aluminum electrolysis bath |
| CN101147913B (en) * | 2007-07-27 | 2010-08-04 | 中国铝业股份有限公司 | Method for processing aluminium electrolytic tank with magnesium reduction slag as additive |
| CN101798691A (en) * | 2010-04-28 | 2010-08-11 | 四川启明星铝业有限责任公司 | Method for recovering waste cathode of aluminum electrolytic cell |
| CN101811695A (en) * | 2010-04-02 | 2010-08-25 | 北京矿冶研究总院 | Method for recovering graphite from electrolytic aluminum waste cathode carbon block |
| CN103088365A (en) * | 2013-02-01 | 2013-05-08 | 贵阳冶金机电工艺有限公司 | Clean production process of electrolytic aluminum |
| CN103537365A (en) * | 2013-10-16 | 2014-01-29 | 山东信发华信铝业有限公司 | Aluminum reduction cell cathode bottom block harmless treatment system and process |
| CN104438280A (en) * | 2014-10-21 | 2015-03-25 | 北京森泉伟业科技有限公司 | Method for sorting waste aluminum electrolytic cathodes |
| CN105401169A (en) * | 2015-11-04 | 2016-03-16 | 新疆生产建设兵团农八师天山铝业有限公司 | Environment-friendly recycling method for abandoned cathode carbon blocks of aluminum electrolysis cell |
| CN105499251A (en) * | 2015-12-11 | 2016-04-20 | 北京京碧蓝环保科技有限公司 | Glass solidification stabilization method for treating aluminum electrolysis waste slot lining based on F-Si chemical bond |
| CN105908217A (en) * | 2016-06-24 | 2016-08-31 | 登封电厂集团铝合金有限公司 | Method for using waste cathode carbon block of aluminum cell for manufacturing side carbon block |
| CN106077036A (en) * | 2016-06-30 | 2016-11-09 | 中南大学 | A kind of method of ultrasonic assistant acidleach process aluminum electrolytic waste and old cathode carbon block |
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| CN109127647A (en) * | 2018-07-17 | 2019-01-04 | 郑州经纬科技实业有限公司 | Cyanogen/fluoride method for innocent treatment in aluminium electrolytic tank |
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| CN111575430A (en) * | 2020-05-19 | 2020-08-25 | 西安热工研究院有限公司 | Method for treating waste cathode carbon block waste of electrolytic aluminum by using steelmaking converter |
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Effective date of registration: 20180529 Address after: 450041 No. 82, Jiyuan Road, Zhengzhou District, Henan Co-patentee after: Aluminum Corporation of China Limited Patentee after: Henan Hua Hui Nonferrous Engineering Design Co., Ltd. Address before: 100814 Beijing Haidian District Fuxing Road 12, China Aluminum Limited by Share Ltd Patentee before: Aluminum Corporation of China Limited |