CN109437149A - A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block - Google Patents
A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block Download PDFInfo
- Publication number
- CN109437149A CN109437149A CN201811450255.2A CN201811450255A CN109437149A CN 109437149 A CN109437149 A CN 109437149A CN 201811450255 A CN201811450255 A CN 201811450255A CN 109437149 A CN109437149 A CN 109437149A
- Authority
- CN
- China
- Prior art keywords
- carbon block
- dissolution
- electrolytic cell
- purification
- waste cathode
- 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
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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/18—Electrolytes
Abstract
A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block of the invention, concrete operations are to be evaporated in vacuo after being crushed waste cathode carbon block, are dissolved out using aluminium chloride and hydrochloric acid mixed solution, it is filtered after dissolution, high purity carbon material is obtained after residue washing, dissolution fluid is precipitated through crystallisation by cooling and filters, and obtains solution after crystallized product and filtering, it mutually should be used as product treatment, or dissolution process is returned, dissolution fluid can also be subjected to neutralization reaction, later, filter residue calcining, filtrate return to dissolution process after adjusting concentration.The method of purification forms the principle of compound using the porosity and aluminium chloride and calcirm-fluoride of cathode carbon pieces after vacuum distillation, it is dissolved in the calcirm-fluoride in cathode carbon pieces in dissolution fluid, to be separated with carbon, the metal oxide dissolved in carbon block simultaneously further purifies carbon, and after processing, carbon purity can achieve 97% or more, method is easy to operate, it is at low cost, secondary pollution will not be generated, remarkable benefit is obtained.
Description
Technical field:
The invention belongs to metallurgy and field of environmental technology, and in particular to a kind of purification side of waste cathode of aluminum electrolytic cell carbon block
Method.
Background technique:
Aluminium is the second largest metal material for being only second to steel, currently, the annual output of world's metallic aluminium is about at 60,000,000 tons, I
State's aluminium yield accounts for about the 40% of world aluminum yield.Metallic aluminium is entirely what the method for using molten-salt electrolysis produced, production aluminium
Electrolytic cell is built by carbonaceous material (also referred to as cathode carbon pieces) and non-carbonaceous material (also referred to as refractory material), electricity
Solution slot generally use after 5-6 will breakage overhaul, during overhaul, the carbonaceous material and non-carbonaceous material in former electrolytic cell are equal
As waste material (referred to as aluminium cell waste liner), and since it contains a large amount of water-soluble fluorides and a small amount of cyaniding
Object is set to danger wastes by country.One ton of metallic aluminium of every production about generates the waste cathode carbon block and 5-10kg of 5-10kg
Waste refractory materials.Currently, waste cathode carbon block and waste refractory materials that aluminium electrolytic industry generates be not yet received it is effective using and
Processing is generally to be handled by the way of stockpiling, but have in these waste materials containing many electrolyte fluorides, cyanide etc.
Evil soluble substance, long-term stack can generate adverse effect to underground water and ambient enviroment.Therefore the place of aluminium cell waste liner
Reason has become one of the main problem for restricting the development of China's aluminum i ndustry.
Currently, countries in the world have carried out a large amount of research to the processing of aluminium cell waste liner, especially for useless yin
Pole carbon block develops many technologies.These technologies mainly have strong acid leaching, highly basic leaching, floatation, flotation and soda acid to leach
Combination method, pyrohydrolytic method etc., but either which kind of method is there is at high cost, and there are secondary pollutions etc. to ask for treatment process
Topic, it is difficult to fundamentally solve the recycling and utilization of aluminium electrolytic carbon lining.
Summary of the invention:
The purpose of the present invention is overcoming above-mentioned the shortcomings of the prior art, for the useless yin of vacuum distillation process aluminum electrolytic slot
The lower problem of the carbon purity that pole carbon block obtains, proposes a kind of method of purification of waste cathode of aluminum electrolytic cell carbon block, this method
Basic principle is to utilize the porosity of cathode carbon pieces after vacuum distillation and aluminium chloride and calcirm-fluoride (other fluorides can also with) shape
At the principle of compound, it is dissolved in the calcirm-fluoride in cathode carbon pieces in liquor alumini chloridi to separate with carbon, in dissolution calcirm-fluoride
While, certain density hydrochloric acid is added in liquor alumini chloridi, guarantees that aluminium chloride does not hydrolyze while dissolving the metal in carbon block
Oxide further purifies carbon, and carbon purity can achieve 97% or more after liquor alumini chloridi is handled.
A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block, comprising the following steps:
Step 1, it distills:
(1) by waste cathode of aluminum electrolytic cell carbon block smashing to granularity≤4cm；
(2) waste cathode carbon block is evaporated in vacuo after will be broken, and vapo(u)rizing temperature is 1100-1300 DEG C, distillation time 2-
10h, vacuum pressure 0-10Pa；
Step 2, it dissolves out:
Cathode carbon pieces after distillation are put into aluminium chloride and hydrochloric acid mixed solution, are dissolved out, are obtained by filtration after dissolution
Dissolution fluid and excessively filter residue obtain carbonaceous material after the filter residue excessively is washed, in which:
The leaching temperature is 20-150 DEG C, dissolution time 1-10h；
Liquid-solid ratio (cathode carbon pieces quality and the chlorination of cathode carbon pieces and aluminium chloride and hydrochloric acid mixed solution after the distillation
The ratio of aluminum solutions volume, unit g/ml) be 1:(1-10).
Step 3, dissolution fluid is handled:
Dissolution fluid is handled, specifically using one of following two mode:
(1) calcirm-fluoride and aluminum chloride crystals is obtained by filtration after calcirm-fluoride and aluminium chloride is precipitated in crystallisation by cooling in dissolution fluid
Solution after product and filtering, in which:
Solution returns to dissolution process after aluminium chloride is added after filtering；
Calcirm-fluoride obtains solid phase and the lower liquor alumini chloridi of concentration, the solid phase through washing with aluminum chloride crystals product
Main component is CaF2, the liquor alumini chloridi, which returns, dissolves out process, and calcirm-fluoride crystallization is sold or returned as product and is electrolysed
Slot；
(2) calcium hydroxide or sodium hydroxide are added into dissolution fluid, neutralization reaction to solution ph is greater than 10, filters to obtain filter
Slag and filtrate, in which:
The filter residue is calcined, and Al is obtained2O3And CaF2, return in electrolytic cell and used as raw material, wherein is described
Calcination temperature be 1000-1200 DEG C, calcination time 1-5h；
The filtrate returns to dissolution process after aluminium chloride and hydrochloric acid adjusting concentration is added, in which:
When filtrate is by dissolution fluid and calcium hydroxide with obtaining, and the calcium chloride concentration in filtrate reaches 35% or more
When, filtrate is evaporated crystallization, is precipitated calcium chloride crystals (containing the impurity such as a small amount of sodium chloride, iron chloride, magnesium chloride), simultaneously
Distillate and remaining after crystallization solution are obtained, distillate and remaining after crystallization solution return after aluminium chloride and hydrochloric acid adjusting concentration is added
Back dissolving goes out process, completion processing；
When filtrate is by dissolution fluid and sodium hydroxide with obtaining, and the sodium chloride concentration in filtrate reaches 40% or more
When, filtrate is evaporated crystallization, precipitated sodium chloride crystal (contains the impurity such as a small amount of calcium chloride, iron chloride, magnesium chloride), simultaneously
Distillate and remaining after crystallization solution are obtained, distillate and remaining after crystallization solution return after aluminium chloride and hydrochloric acid adjusting concentration is added
Back dissolving goes out process, completion processing.
In the step 1 (2), vacuum distillation carries out in vacuum distillation furnace.
In the step 1 (2), in vacuum distillation process, 98% or more sodium fluoride (NaF), ice in waste cathode carbon block
Spar (Na3AlF6) and metallic sodium be evaporated in vacuo out, and crystallized on the crystallizer of vacuum distillation furnace.
In the step 1 (2), the ingredient and mass percentage that waste cathode carbon block includes after distillation are charcoal 90-94%,
CaF23-6%, aluminium 0-2%, other metal oxide impurities 1-3%, oxide impurity mainly have SiO2, Fe2O3, Al2O3,
NaAl11O22Deng.
In the step 1 (2), the porosity of the cathode carbon pieces after distillation reaches 20% or more.
In the step 2, in aluminium chloride and hydrochloric acid mixed solution: concentration of aluminum chloride 5-25%, concentration of hydrochloric acid≤
15%.
In the step 2, carbonaceous material purity is greater than 97%, the main component and mass percentage of carbonaceous material
Are as follows: C > 97%, CaF2< 1%, other oxide impurity content < 2%.
In the step 2, main component is aluminium chloride, the complex compound of aluminium chloride and calcirm-fluoride and metal chlorine in dissolution fluid
Compound, the metal chloride are decomposed by hydrochloric acid by metal oxides other in waste cathode carbon block and are generated.
In the step 2, in process in leaching, Al3+With F-Stable complex ion [AlF can be formed6]3-, it is present in acid
In property solution, AlCl3With stronger complexing power, AlCl3CaF can be effectively facilitated2Dissolution, dissolution reaction are as follows:
3CaF2+AlCl3=3Ca2++[AlF6]3-+3Cl-
In addition to this, hydrochloric acid reacts as follows with what metallic aluminium in waste cathode carbon block and other metal oxides occurred:
2Al+6HCl=2AlCl3+3H2↑
Na2O+2HCl=2NaCl+H2O
CaO+2HCl=CaCl2+H2O
MgO+2HCl=MgCl2+H2O
Fe2O3+ 6HCl=2FeCl3+3H2O
Al2O3+ 6HCl=2AlCl3+3H2O
In the step 3 (2), calcium hydroxide is dissolved in water by limestone calcination and produces.
In the step 3 (2), when using in calcium hydroxide and when, the filter residue main component be aluminium hydroxide and
Calcirm-fluoride, when using in sodium hydroxide and when, the filter residue main component is aluminium hydroxide and sodium fluoride.
Beneficial effects of the present invention:
(1) method of purification of waste cathode of aluminum electrolytic cell carbon block of the invention waste cathode carbon block process after purification vacuum distillation
In, while dissolving out calcirm-fluoride, metal oxide and metallic aluminium in waste cathode carbon block is made to be reacted into solution.Through aluminium chloride
With the main component for the carbonaceous material for filtering acquisition after the mixed solution dissolution of hydrochloric acid are as follows: C > 97%, CaF2< 1%, other oxidations
Object impurity content < 2%.
(2) point of calcirm-fluoride and carbon block is not only realized in the purification process of waste cathode of aluminum electrolytic cell carbon block of the invention
From, while separating for the aluminium in carbon block and part of the metal oxide and carbon block is realized, the carbonaceous material after making vacuum distillation is pure
Degree is greatly improved, and carbonaceous material purity reaches as high as 98% or more.
(3) carbonaceous material after purifying can be used as the new aluminum electrolyzing cell used carbon block of production or as other electrode material.
(4) after Methods For Purification of the invention vacuum distillation during waste cathode carbon block, except a small amount of calcium chloride of generation or chlorine
Change other than sodium, does not generate secondary pollution, at low cost, remarkable benefit.
Detailed description of the invention:
Fig. 1 is the process flow chart of the method for purification of the waste cathode of aluminum electrolytic cell carbon block of embodiment 1；
Fig. 2 is the process flow chart of the method for purification of the waste cathode of aluminum electrolytic cell carbon block of embodiment 2；
Fig. 3 is the process flow chart of the method for purification of the waste cathode of aluminum electrolytic cell carbon block of embodiment 3；
Fig. 4 is the X-ray diffraction material phase analysis figure that embodiment 1 and embodiment 3 obtain mixture precipitation.
Specific embodiment:
Below with reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block, flow chart are as shown in Figure 1, comprising the following steps:
200 grams of waste cathode of aluminum electrolytic cell carbon blocks from Mr. Yu's electrolytic aluminium factory are taken, carbon content is 70% in carbon block, by the charcoal
It is 2-4cm that block, which is crushed to granularity, is evaporated in vacuo, and vapo(u)rizing temperature is 1150 DEG C, distillation time 2h, alembic residual compression
For 10Pa, after vacuum distillation, 12g metallic sodium and 25 grams of electrolyte components, the carbon block residue matter after distillation are obtained on crystallizer
Amount is 160g, and main component is C 92.20%, F 2.36%, Ca 2.27%, Al 1.86%, other oxides 1.31%；It will
The carbon block is put into aluminium chloride and hydrochloric acid mixed solution and is dissolved out, and solution chlorination aluminum concentration is 20%, and concentration of hydrochloric acid 10% is molten
Liquid product is 1L, and dissolution time 2h, leaching temperature is 95 DEG C.Filtering obtains carbon block and dissolution fluid after dissolution, and dissolution fluid is cooling
To room temperature, precipitating 5g is precipitated, X-ray diffraction material phase analysis figure is as shown in figure 4, the precipitating returns to electrolysis after 1100 DEG C of calcinings
Slot；After filtering, carbon block will be obtained and dried at 100 DEG C, 153 grams of purification carbonaceous materials are obtained, wherein carbon purity is that 97.05%, F contains
Measure 0.32%, Ca 0.20%, Al 0.71%.
Embodiment 2
A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block, flow chart are as shown in Figure 2, comprising the following steps:
200 grams of waste cathode of aluminum electrolytic cell carbon blocks from Mr. Yu's electrolytic aluminium factory are taken, carbon content is 68.54% in carbon block, will
The carbon block smashing to granularity is 2-4cm, is evaporated in vacuo, and vapo(u)rizing temperature is 1200 DEG C, distillation time 5h, and alembic is remaining
Pressure is 5Pa, obtains 17g metallic sodium and 35 grams of electrolyte components after vacuum distillation on crystallizer, and the carbon block after distillation is remaining
Quality is 152g, and main component is C 93.10%, F 2.06%, Ca 1.87%, Al 1.56%, other oxides 1.41%.
The carbon block is put into liquor alumini chloridi and is dissolved out, solution chlorination aluminum concentration is 25%, concentration of hydrochloric acid 10%, and liquor capacity is
800ml, dissolution time 3h, leaching temperature are 95 DEG C.Filtering obtains carbon block and dissolution fluid after dissolution, and carbon block will be obtained after filtering
It is dried at 100 DEG C, obtains 145 grams of purification carbon blocks, wherein carbon purity is 98.15%, F content 0.12%, Ca 0.30%, Al
0.68%, other impurity 0.85%.Dissolution fluid be added sodium hydroxide filtering obtain aluminium hydroxide and calcium fluoride mixture precipitating and
Filtrate, the mixture precipitation X-ray diffraction material phase analysis figure return to electrolytic cell after 1100 DEG C of calcinings as shown in figure 4, precipitating, and filter
Solid aluminum chloride is added in liquid and concentrated hydrochloric acid adjusts Chlorine in Solution aluminum concentration 25%, concentration of hydrochloric acid 10%.The solution is recycled
After three times, the sodium chloride concentration in solution has reached 40%, and the filtered fluid obtained at this time is in 100 DEG C of heating evaporation moisture, crystallization
Sodium chloride crystal, moisture are returned for configuring liquor alumini chloridi.
Embodiment 3
A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block, flow chart are as shown in Figure 3, comprising the following steps:
200 grams of waste cathode of aluminum electrolytic cell carbon blocks from Mr. Yu's electrolytic aluminium factory are taken, carbon content is 73.80% in carbon block, will
The carbon block smashing to granularity is 2-4cm, is evaporated in vacuo, and vapo(u)rizing temperature is 1300 DEG C, distillation time 5h, and alembic is remaining
Pressure is 5Pa, obtains 9.50g metallic sodium and 40 grams of electrolyte components after vacuum distillation on crystallizer, and the carbon block after distillation is surplus
Remaining quality is 148g, and main component is C 93.80%, F 1.86%, Ca 1.57%, Al 1.36%, other oxides
1.41%.The carbon block is put into aluminium chloride and hydrochloric acid mixed solution and is dissolved out, solution chlorination aluminum concentration is 25%, concentration of hydrochloric acid
It is 10%, liquor capacity 750ml, dissolution time 3h, leaching temperature are 120 DEG C.Filtering obtains carbon block and dissolution after dissolution
Liquid will obtain carbon block and dry at 100 DEG C, and obtain 143 grams of purification carbonaceous materials after filtering, wherein carbon purity is that 98.25%, F contains
Measure 0.22%, Ca 0.38%, Al 0.38%, other impurity 0.80%；Dissolution fluid is added calcium hydroxide filtering and obtains hydroxide
Aluminium and calcium fluoride mixture precipitating and filtrate, precipitating X-ray diffraction material phase analysis figure is as shown in figure 4, the mixture precipitation passes through
Electrolytic cell is returned to after 1100 DEG C of calcinings, solid aluminum chloride is added in filtrate and concentrated hydrochloric acid adjusts Chlorine in Solution aluminum concentration 25%, salt
Acid concentration 10%.After the solution is recycled twice, the calcium chloride concentration in solution has reached 37%, the filtered fluid obtained at this time
In 100 DEG C of heating evaporation moisture, calcium chloride crystals are crystallized, moisture is returned for configuring liquor alumini chloridi.
Claims (6)
1. a kind of method of purification of waste cathode of aluminum electrolytic cell carbon block, which comprises the following steps:
Step 1, it distills:
(1) by waste cathode of aluminum electrolytic cell carbon block smashing to granularity≤4cm；
(2) waste cathode carbon block is evaporated in vacuo after will be broken, and vapo(u)rizing temperature is 1100-1250 DEG C, distillation time 2-10h,
Vacuum pressure is 0-10Pa；
Step 2, it dissolves out:
Cathode carbon pieces after distillation are put into aluminium chloride and hydrochloric acid mixed solution, are dissolved out, dissolution is obtained by filtration after dissolution
Liquid and excessively filter residue obtain carbonaceous material after the filter residue excessively is washed, in which:
The leaching temperature is 20-150 DEG C, dissolution time 1-10h；
The liquid-solid ratio of cathode carbon pieces and aluminium chloride and hydrochloric acid mixed solution is 1:(1-10 after the distillation), unit g/ml；
Step 3, dissolution fluid is handled:
Dissolution fluid is handled, specifically using one of following two mode:
(1) calcirm-fluoride and aluminum chloride crystals product is obtained by filtration after calcirm-fluoride and aluminium chloride is precipitated in crystallisation by cooling in dissolution fluid
With solution after filtering, in which:
Solution returns to dissolution process after aluminium chloride is added after filtering；
Calcirm-fluoride obtains solid phase and liquor alumini chloridi through washing with aluminum chloride crystals product, and the solid phase main component is CaF2,
The liquor alumini chloridi returns to dissolution process, and electrolytic cell is sold or returned in calcirm-fluoride crystallization as product；
(2) calcium hydroxide or sodium hydroxide are added into dissolution fluid, neutralization reaction to solution ph is greater than 10, filter filter residue with
Filtrate, in which:
The filter residue is calcined, and Al is obtained2O3And CaF2；
The filtrate returns to dissolution process after aluminium chloride and hydrochloric acid adjusting concentration is added, in which:
It, will when filtrate is by dissolution fluid and calcium hydroxide and when obtaining, and when the calcium chloride concentration in filtrate reaches 35% or more
Filtrate is evaporated crystallization, calcium chloride crystals is precipitated, while obtaining distillate and remaining after crystallization solution, after distillate and crystallization
Aluminium chloride is added in surplus solution and hydrochloric acid adjusts return dissolution process after concentration, completion processing；
It, will when filtrate is by dissolution fluid and sodium hydroxide and when obtaining, and when the sodium chloride concentration in filtrate reaches 40% or more
Filtrate is evaporated crystallization, precipitated sodium chloride crystal, while obtaining distillate and remaining after crystallization solution, after distillate and crystallization
Aluminium chloride is added in surplus solution and hydrochloric acid adjusts return dissolution process after concentration, completion processing.
2. a kind of method of purification of waste cathode of aluminum electrolytic cell carbon block according to claim 1, which is characterized in that the step
In rapid 1 (2), the ingredient and mass percentage that waste cathode carbon block includes after distillation are charcoal 90-94%, CaF23-6%, aluminium 0-
2%, other metal oxide impurities 1-3%.
3. a kind of method of purification of waste cathode of aluminum electrolytic cell carbon block according to claim 1, which is characterized in that the step
In rapid 1 (2), the porosity of the cathode carbon pieces after distillation reaches 20% or more.
4. a kind of method of purification of waste cathode of aluminum electrolytic cell carbon block according to claim 1, which is characterized in that the step
In rapid 2, in aluminium chloride and hydrochloric acid mixed solution: concentration of aluminum chloride 5-25%, concentration of hydrochloric acid≤15%.
5. a kind of method of purification of waste cathode of aluminum electrolytic cell carbon block according to claim 1, which is characterized in that the step
In rapid 2, carbonaceous material purity is greater than 97%, the ingredient and mass percentage of carbonaceous material are as follows: C > 97%, CaF2< 1%,
Its oxide impurity content < 2%.
6. a kind of method of purification of waste cathode of aluminum electrolytic cell carbon block according to claim 1, which is characterized in that the step
In rapid 3 method (2), filter residue calcination temperature is 1000-1200 DEG C, calcination time 1-5h, the Al calcined2O3And CaF2It returns
It returns in electrolytic cell and is used as raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811450255.2A CN109437149A (en) | 2018-11-30 | 2018-11-30 | A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811450255.2A CN109437149A (en) | 2018-11-30 | 2018-11-30 | A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109437149A true CN109437149A (en) | 2019-03-08 |
Family
ID=65555094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811450255.2A Pending CN109437149A (en) | 2018-11-30 | 2018-11-30 | A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109437149A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865736A (en) * | 2019-03-22 | 2019-06-11 | 中南大学 | A kind of method that aluminum cell waste cathode leached mud prepares adsorbent material |
| CN110775955A (en) * | 2019-11-06 | 2020-02-11 | 东北大学 | Method for treating anode carbon slag of aluminum electrolysis cell by using NaOH molten salt method |
| CN110938838A (en) * | 2019-11-06 | 2020-03-31 | 东北大学 | Method for treating anode carbon slag of aluminum electrolysis cell by using NaCl molten salt extraction method |
| CN111217356A (en) * | 2020-03-02 | 2020-06-02 | 中南大学 | Method for recovering porous carbon from aluminum electrolysis anode carbon slag |
| CN113942994A (en) * | 2021-10-26 | 2022-01-18 | 阿坝铝厂 | Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2186433A (en) * | 1936-11-17 | 1940-01-09 | Firm Rutgerswerke Ag | Process for the recovery of aluminum and fluorine compounds from the worn-out linings of the electric furnaces employed for the production of aluminum |
| CN1895803A (en) * | 2006-06-22 | 2007-01-17 | 中国铝业股份有限公司 | Treatment of aluminum electrolytic-cell waste lining |
| CN101480658A (en) * | 2008-12-26 | 2009-07-15 | 东北大学 | Method for electrolyzing waste and old cathode carbon block by comprehensive utilization of aluminum |
| CN101829670A (en) * | 2010-04-02 | 2010-09-15 | 北京矿冶研究总院 | Method for recovering carbon from electrolytic aluminum waste cathode carbon block |
| 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 |
-
2018
- 2018-11-30 CN CN201811450255.2A patent/CN109437149A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2186433A (en) * | 1936-11-17 | 1940-01-09 | Firm Rutgerswerke Ag | Process for the recovery of aluminum and fluorine compounds from the worn-out linings of the electric furnaces employed for the production of aluminum |
| CN1895803A (en) * | 2006-06-22 | 2007-01-17 | 中国铝业股份有限公司 | Treatment of aluminum electrolytic-cell waste lining |
| CN101480658A (en) * | 2008-12-26 | 2009-07-15 | 东北大学 | Method for electrolyzing waste and old cathode carbon block by comprehensive utilization of aluminum |
| CN101829670A (en) * | 2010-04-02 | 2010-09-15 | 北京矿冶研究总院 | Method for recovering carbon from electrolytic aluminum waste cathode carbon block |
| 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 |
Non-Patent Citations (3)
| Title |
|---|
| WANG YAOWU等: "Separation and Recycling of Spent Carbon Cathode Blocks in the Aluminum Industry by the Vacuum Distillation Process", 《JOM》 * |
| 刘德信: "《实用化学品合成手册》", 31 August 1986, 山东大学出版社 * |
| 姚广春: "《电热法制取铝硅合金》", 30 April 1998 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865736A (en) * | 2019-03-22 | 2019-06-11 | 中南大学 | A kind of method that aluminum cell waste cathode leached mud prepares adsorbent material |
| CN110775955A (en) * | 2019-11-06 | 2020-02-11 | 东北大学 | Method for treating anode carbon slag of aluminum electrolysis cell by using NaOH molten salt method |
| CN110938838A (en) * | 2019-11-06 | 2020-03-31 | 东北大学 | Method for treating anode carbon slag of aluminum electrolysis cell by using NaCl molten salt extraction method |
| CN110938838B (en) * | 2019-11-06 | 2021-12-31 | 东北大学 | Method for treating anode carbon slag of aluminum electrolysis cell by using NaCl molten salt extraction method |
| CN110775955B (en) * | 2019-11-06 | 2023-04-07 | 东北大学 | Method for treating anode carbon slag of aluminum electrolysis cell by using NaOH molten salt method |
| CN111217356A (en) * | 2020-03-02 | 2020-06-02 | 中南大学 | Method for recovering porous carbon from aluminum electrolysis anode carbon slag |
| CN113942994A (en) * | 2021-10-26 | 2022-01-18 | 阿坝铝厂 | Method for separating electrolyte from waste cathode carbon block of electrolytic aluminum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109437149A (en) | A kind of method of purification of waste cathode of aluminum electrolytic cell carbon block | |
| CN100455512C (en) | Method for preparing battery-stage monohydrate lithium hydroxide | |
| US4889695A (en) | Reclaiming spent potlining | |
| CA3054748C (en) | Method for producing lithium hydroxide from lithium-containing ore | |
| CN114438329B (en) | Comprehensive recovery method of waste lithium-containing aluminum electrolyte | |
| CN107055575B (en) | A kind of production technology of LITHIUM BATTERY lithium hydroxide | |
| CN113249578B (en) | Recycling treatment method of fluorine-containing waste generated by aluminum electrolysis and aluminum fluoride product | |
| CN102560148A (en) | Method for smelting lithium by vacuum aluminothermic reduction | |
| CN115198111B (en) | Lithium extraction method of lithium-containing waste aluminum electrolyte | |
| CN114457237B (en) | Method for recovering lithium from acidic leaching solution of aluminum electrolyte | |
| CN111321302A (en) | Method for recovering lithium and potassium from high lithium potassium anode carbon residue or high lithium potassium electrolyte | |
| CN104340994B (en) | A kind of method of CFBB total utilization of PCA | |
| CN113816399A (en) | Method for recycling NaCl and recycling Fe, Mn and Mg resources in titanium slag | |
| CN109133028A (en) | A method of electrolytic cell waste cathode carbon block recycling is disposed with alkaline process | |
| CN116814957A (en) | Method for synchronously decyanating overhaul slag and extracting lithium | |
| CN114804171A (en) | Method for preparing aluminum fluoride and lithium carbonate by lithium-containing aluminum electrolyte | |
| CN108100995A (en) | The synthetical recovery processing method of liquid after a kind of aluminium displacement sponge indium containing indium | |
| CN113683113A (en) | Process for purifying calcium fluoride from fluorite ore subjected to flotation | |
| CN112645363A (en) | Method for preparing battery-grade lithium carbonate by taking lepidolite as raw material | |
| CN110723743A (en) | Method for extracting lithium resource from salt lake brine through electric flocculation | |
| CN113249582B (en) | Treatment method of aluminum metallurgy solid waste | |
| CN114684835B (en) | Method for preparing aluminum fluoride product by combined treatment of aluminum industry solid waste | |
| CN115448345B (en) | Method for harmless production of cryolite from overhaul slag | |
| CN1050056A (en) | The production method of sodium hydroxide lye | |
| WO2022237490A1 (en) | Method for producing metal aluminum and polysilicon by using high silicon aluminum-containing resource |
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: 20190308 |
|
| RJ01 | Rejection of invention patent application after publication |