CN107628614B - A kind of calcining method of disposal of electrolytic aluminium waste cathode - Google Patents
A kind of calcining method of disposal of electrolytic aluminium waste cathode Download PDFInfo
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- CN107628614B CN107628614B CN201610565814.9A CN201610565814A CN107628614B CN 107628614 B CN107628614 B CN 107628614B CN 201610565814 A CN201610565814 A CN 201610565814A CN 107628614 B CN107628614 B CN 107628614B
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Abstract
The present invention provides a kind of calcining methods of disposal of electrolytic aluminium waste cathode, belong to field for the treatment of of solid waste, comprising: control the temperature for calcining the flue gas I that electrolytic aluminium waste cathode generates after 1200-1700 DEG C, flue gas I is mixed with ambient atmos and the temperature of flue gas is down to 800 DEG C or less, obtain flue gas II, wherein the velocity ratio of flue gas I and ambient atmos is 1:2-10, and the volume ratio of flue gas I and ambient atmos is 1:3-15.Carbon in useless cathode can be effectively separated by calcining electrolytic aluminium waste cathode with fluoride, oxide and cyanide, this method is advantageously implemented the cooling of flue gas, further cooperation selection by winnowing classification processing, be conducive to the recycling of fluoride, oxide, and then realize the harmlessness disposing and resource utilization of electrolytic aluminium waste cathode.
Description
Technical field
The present invention relates to field for the treatment of of solid waste, in particular to a kind of calcining disposition side of electrolytic aluminium waste cathode
Method.
Background technique
Electrolytic aluminium cathode with calcined anthracite, metallurgical coke, graphite etc. for aggregate, with coal tar pitch etc. be adhesive kneading after make
At, it is mainly used for making the block class of aluminium cell carbon lining or paste class carbon product.In aluminium electrolysis process, occur on cathode
Key reaction be to be fused to ice crystal (Na2AIFeNa2AIF6) in AI3+It is reduced into liquid metal aluminium, converges product in carbonaceous slot bottom
The conductive cathode of surface, molten aluminum and carbonaceous slot bottom collectively as electrolytic cell.Due to there is various fluorides, miscellaneous in electrolyte melt
The effects of corroding and washing away, occurs for matter, the fused salt cathode blocks that generation is electrolysed under the action of electric field and long term high temperature, in addition
The effect of thermal stress makes cathode material deform, swells, is broken, and then damaged cathode is useless cathode.
Electrolytic aluminium waste cathode is containing 20-40% or so fluoride, the hazardous waste of micro cyanide, due to its fluorination
Object and cyanide are easy hydrolysis, therefore such as without effectively disposing, encounter drench with rain, water logging be easy to cause serious environmental pollution.
China's electrolytic aluminium yield in 2014 has reached more than 2,200 ten thousand tons, and world's electrolytic aluminium yield has reached more than 5,000 ten thousand tons.With electrolysis
The increase of aluminium yield, the useless cathode that electrolytic aluminium generates increasingly increase.Currently, China's aluminum electrolysis industry has had more than 400 ten thousand tons
Accumulation stockpiling, and with annual 200000 tons or so of amount sustainable growth.Due to lacking advanced electrolytic aluminium waste yin both at home and abroad at present
Pole harmlessness disposing and recycling reutilization technology, the burial processing method that aluminium electrolysis enterprise generallys use not only cause environment
Very big pollution also creates the significant wastage of resource.
China or even the interior disposition electrolytic aluminium waste cathode of world wide mainly use wet process and combustion method, landfill method and build at present
Warehouse stockpiling, the toner value that wherein wet process obtains is not high, and combustion method cannot effectively recycle fluoride therein.Therefore it mainly adopts
With high-cost landfill method, but since most of enterprise cannot carry out innoxious landfill according to the disposal options of hazardous waste,
The mode cost that library is stored up of opening a position is again high.Therefore the problem of environmental pollution of electrolytic aluminium waste cathode is never effectively solved
Certainly.
Summary of the invention
The purpose of the present invention is to provide a kind of calcining method of disposal of electrolytic aluminium waste cathode, this method provides a kind of new
The mode to flue gas cool-down, and be conducive to the particulate separations such as the dust in flue gas.In this way, it realizes in useless cathode
Carbon and fluoride, oxide and cyanide efficiently separate, and by mixing the flue gas I generated to calcining with ambient atmos
Temperature control is carried out, selection by winnowing classification processing is further cooperated, is conducive to recycle fluoride, oxide, and then realize electrolytic aluminium waste
The harmlessness disposing and resource utilization of cathode.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of calcining method of disposal of electrolytic aluminium waste cathode comprising: the flue gas I of electrolytic aluminium waste cathode generation will be calcined
Temperature controls after 1200-1700 DEG C, and flue gas I is mixed with ambient atmos and the temperature of flue gas I is down to 800 DEG C hereinafter, obtaining
To flue gas II, wherein the velocity ratio of flue gas I and ambient atmos is 1:2-10, and the volume ratio of flue gas I and ambient atmos is 1:3-
15。
The method of disposition electrolytic aluminium waste cathode relatively good at present is mainly the method that water mist processing is carried out after calcining, the method
It is that electrolytic aluminium waste cathode is calcined using superhigh temperature furnace, makes fluoride, cyanide and oxide volatilization therein, calcine the cigarette of generation
Gas is discharged after being handled by the way of water mist absorption.Although this method can obtain the carbon of higher degree, using
When the mode that water mist absorbs handles flue gas, fluoride, the oxide etc. in flue gas cannot be efficiently separated, no
Conducive to the resource utilization of electrolytic aluminium waste cathode.
Compared with prior art, the invention has the benefit that
(1) temperature is after 1200-1700 DEG C of flue gas I is mixed with ambient atmos, since the temperature of ambient atmos is much smaller than
The temperature of flue gas I quickly mix with ambient atmos, and the temperature decrease of flue gas I is to 800 DEG C hereinafter, flue gas after being quenched
In fluoride form solid powdery since temperature moment reduces, i.e. the fluoride containing solid-state powdery in flue gas II, then
Flue gas II is gradually separated using the means that selection by winnowing is classified, fluoride and oxide can have effectively been recycled, be conducive to
Realize the harmlessness disposing and resource utilization of electrolytic aluminium waste cathode.
(2) when controlling the temperature of flue gas I, flue gas I is mixed with ambient atmos, flue gas I and ambient atmos when mixing
Velocity ratio is 1:2-10, and flue gas I and the volume ratio of ambient atmos are 1:3-15, controls the two parameters and enables to flue gas I
Temperature in a very short period of time by 1200-1700 DEG C be reduced to 800 DEG C hereinafter, the rapid drawdown of I temperature of flue gas is conducive to make flue gas
Fluoride in I is in instantaneous solidification at powder.
(3) this method can be realized efficiently separating for carbon in useless cathode and fluoride, oxide and cyanide, into
One step cooperates selection by winnowing classification processing, is conducive to recycle fluoride, oxide, and then realize the harmlessness disposing of electrolytic aluminium waste cathode
And resource utilization.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is the flow diagram of the calcining method of disposal of electrolytic aluminium waste cathode in the embodiment of the present invention.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
Present embodiment provides a kind of calcining method of disposal of electrolytic aluminium waste cathode comprising: by calcining electrolytic aluminium waste yin
The temperature for the flue gas I that pole generates controls after 1200-1700 DEG C, flue gas I is mixed with ambient atmos and by the temperature of flue gas I
800 DEG C are down to hereinafter, obtaining flue gas II, wherein the velocity ratio of flue gas I and ambient atmos is 1:2-10, flue gas I and ambient atmos
Volume ratio be 1:3-15.
In preferred embodiments of the present invention, the condition for calcining electrolytic aluminium waste cathode is by granular electrolytic aluminium waste cathode
Carbon block is in calcining 30-90min at 2200-3000 DEG C；Preferably by granular electrolytic aluminium waste cathode carbon block in 2500-
50-70min is calcined at 2700 DEG C；Granular electrolytic aluminium waste cathode carbon block is most preferably calcined into 60min at 2600 DEG C.
The temperature of calcining is 2200-3000 DEG C, is conducive to make fluoride in electrolytic aluminium waste cathode carbon block and cyanide as complete as possible
Evaporate, to obtain the carbon of high-purity.It is calcined 30-90min hours at 2200-3000 DEG C, height can be obtained
The carbon of purity, and economic cost can be controlled the cost performance highest of this scheme in lower range.
In preferred embodiments of the present invention, the partial size of above-mentioned granular electrolytic aluminium waste cathode carbon block is 1-100mm；
Preferably 40-60mm；Most preferably 50mm.The good permeability of the electrolytic aluminium waste cathode carbon block of this partial size is conducive to calcining and produces
Raw flue gas I is quickly flowed out from fire door.
This method volatilizes fluoride, oxide, decomposition cyaniding therein in electrolytic aluminium waste cathode using calcination method
Object, and the amount of the burned volatilization of carbon material under conditions of basic vacuum in useless cathode is less than 3%, to realize the cathode that gives up
In carbon and fluoride, oxide and cyanide efficiently separate, and be graphitized carbon further, improve carbon materials
Fixation carbon content, carbon after processing can be used as prebaked anode and cathode materials, carburant, graphite is broken and lithium battery is negative
Pole material etc..
Usual electrolytic aluminium waste cathode carbon block is calcined in calcining furnace, and electrolytic aluminium waste cathode carbon block is in 2200-
Can scatter and disappear a part of heat when the flue gas that generates comes out from fire door after calcining at 3000 DEG C, and temperature is possible to can be lower than 1200
℃.When detecting the temperature of flue gas I lower than 1200 DEG C, the modes such as electric heating or gas heating can be used flue gas I
It is warming up in the range of 1200-1700 DEG C, is conducive to further isolate and purify flue gas I.
Temperature is after 1200-1700 DEG C of flue gas I is mixed with ambient atmos, since the temperature of ambient atmos is much smaller than cigarette
The temperature of gas I quickly mix with ambient atmos, and the temperature decrease of flue gas I is to 800 DEG C hereinafter, in flue gas after being quenched
Fluoride form solid powdery since temperature moment reduces, i.e. the fluoride containing solid-state powdery in flue gas II, then adopt
Flue gas II is gradually separated with the means that selection by winnowing is classified, fluoride and oxide can have effectively been recycled, be conducive to reality
The harmlessness disposing and resource utilization of electrolytic aluminium waste cathode are showed.
Herein, it should be noted that ambient atmos in this application refer to that temperature is lower than 40 DEG C of gas, can be often
Wet body is also possible to gas after cooling.The ambient atmos can be air, N2、CO2One of or multiple combinations, this
In invention preferred embodiment, which is outside air, that is, constitutes the gas of earth ambient atmosphere.Select air to cigarette
Gas I is cooled down, at low cost, Yi Shixian.
When controlling the temperature of flue gas I, flue gas I is mixed with ambient atmos, the flow velocity of flue gas I and ambient atmos when mixing
Than for 1:2-10, preferably 1:4-8, most preferably 1:5, the volume ratio of flue gas I and ambient atmos is 1:3-15, preferably
For 1:7-11, most preferably 1:9.Controlling the two parameters enables to the temperature of flue gas I in a very short period of time by 1200-
1700 DEG C are reduced to 800 DEG C hereinafter, realize the rapid drawdown of I temperature of flue gas, be conducive to make fluoride in flue gas I instantaneous solidification at
Powder.
The temperature for the flue gas I that calcining is generated is controlled at 1200-1700 DEG C, and preferably 1400-1600 DEG C, most preferably
1500℃.1200-1700 DEG C at a temperature of, fluoride be in gaseous state, if temperature be lower than 1200 DEG C, fluoride can be in semi liquid state
And heavy forge is come, and isolating and purifying for fluoride is unfavorable for.Such as by taking NaF as an example, the fusing point of NaF is 993 DEG C, and boiling point is 1695
DEG C, after temperature is higher than 1695 DEG C, NaF is that gaseous state is blended in flue gas I；When the temperature decrease of flue gas I is to 800 DEG C or less,
The NaF of gaseous state shape will instantaneous coagulation at solid powder, be conducive to subsequent selection by winnowing grading purification.
Further, after obtaining flue gas II, flue gas II is isolated and purified by the way of selection by winnowing classification, and obtains
Flue gas VI is then carried out qualified discharge by the flue gas VI after gathering dust.During from flue gas II to flue gas VI, cigarette in continuous separation
Fluoride, oxide in gas II carry out qualified discharge after being preferably minimized the pollutant load in flue gas VI.
In preferred embodiments of the present invention, the mode of selection by winnowing classification is sedimentation, cyclonic separation method and bag-ty pe dust collection
In any one or more combination.By using the method for these types of dedusting, can effectively in flue gas II fluoride and
Oxide is isolated and purified, and obtains clean air.
Further, the mode of selection by winnowing classification is preferably that flue gas II obtains flue gas III, flue gas after first using sedimentation dedusting
III again using flue gas IV is obtained after the dedusting of cyclonic separation method, subsequent flue gas IV is dusted using bag-ty pe dust collection, obtains flue gas
Ⅵ。
By the way of the classification of this selection by winnowing, be conducive to purify all kinds of fluorides and oxide in flue gas II.Specifically,
When temperature is when 800 DEG C of flue gases below pass through settling bin, the fluoride deposition of solid powder is in settling bin.Due to difference
The fusing point of fluoride is different, for example the fusing point of NaF is 993 DEG C, and the fusing point of CaF is 1402 DEG C, and the two is changed into solid-state by gaseous state
The speed and deposition velocity of powder are different, and the method settled after this control temperature is conducive to different fluorides
It isolates and purifies out.
Due to using sedimentation completely not isolate fluoride, the oxide etc. in flue gas II merely, this
In scheme, continues to be dusted flue gas III using cyclonic separation method, obtain flue gas IV.Cyclonic separation method is below for 50 μm
The dust removing effects of Atmospheric particulates are bad, and dust collection rate reaches 50% or more.Therefore, then using bag-ty pe dust collection to flue gas IV carry out
Dedusting, dust collection rate reach 99%, obtain the high flue gas VI of cleannes.During being dusted using these types of mode,
The higher fluoride of purity has been obtained, the harmlessness disposing and resource utilization of electrolytic aluminium waste cathode have been advantageously implemented.
In preferred embodiments of the present invention, flue gas IV using bag-ty pe dust collection before being dusted, first by flue gas IV
Temperature is down to 100-150 DEG C, is conducive to select the higher bag filter of sexual valence.
In preferred embodiments of the present invention, flue gas VI carries out qualified discharge after passing through flue gas Water curtain filter.Using flue gas
After Water curtain filter processing, more clean air is obtained, the harmlessness disposing of electrolytic aluminium waste cathode has been advantageously implemented.
It is first that flue gas IV is cold by table before being dusted using bag-ty pe dust collection in preferred embodiments of the present invention
Device cools down.The temperature of flue gas IV quickly can be down to 100-150 DEG C by surface air cooler good cooling results.
This method can be realized efficiently separating for carbon in useless cathode and fluoride, oxide and cyanide.By
The processes such as two-stage temperature control and selection by winnowing, obtained content of fluoride are greater than 90%, and yield is about 32%, can be applied to aluminium electricity
Xie Zhong.The cathode carbon materials of high temperature furnace are drawn off after supercooling, carbon content is fixed and reaches >=97%, can be used as prebake sun
Pole and cathode materials, carburant, graphite is broken and lithium cell cathode material etc..It can be seen that this electrolytic aluminium provided in the present invention
The calcining method of disposal of useless cathode, the harmlessness disposing and recycling for realizing electrolytic aluminium waste cathode recycle.
Embodiment 1
The present embodiment provides a kind of calcining methods of disposal of electrolytic aluminium waste cathode comprising:
The granular electrolytic aluminium waste cathode carbon block of 1-20mm is calcined into 90min at 2200 DEG C, volatilizes fluorination therein
Object, oxide etc., cyanide resolves into nitrogen oxides and hydrocarbon.Flue gas mainly uses selection by winnowing point after two-stage temperature control
Various substances in the mode separating flue of grade, calcined graphitized charcoal element go out calcining furnace through supercooling heel row.
The temperature for calcining the flue gas I that electrolytic aluminium waste cathode generates is controlled after 1200 DEG C, flue gas I is mixed with outside air
Merge and the temperature of flue gas I is down to 800 DEG C hereinafter, obtaining flue gas II, wherein the velocity ratio of flue gas I and outside air is 1:2, cigarette
The volume ratio of gas I and outside air is 1:3.
Temperature obtains flue gas III after 800 DEG C of flue gases II below first use sedimentation dedusting, and flue gas III uses whirlwind again
Flue gas IV is obtained after partition method dedusting, the dust collection rate of cyclonic separation method reaches 50% or more.Then, first the temperature of flue gas IV is dropped
It is dusted to 100-150 DEG C, then by flue gas IV using bag-ty pe dust collection, obtains flue gas VI, the dust collection rate of bag-ty pe dust collection arrives
Up to 99%.After flue gas VI after multistage is gathered dust further passes through flue gas Water curtain filter, after so that flue gas VI is reached discharge standard
It is discharged.
Embodiment 2
It is almost the same with embodiment 1 the present embodiment provides a kind of calcining method of disposal of electrolytic aluminium waste cathode, difference
Be in:
The granular electrolytic aluminium waste cathode carbon block of 20-40mm is calcined into 70min at 2500 DEG C.Then, calcining is electrolysed
The give up temperature of flue gas I that cathode generates of aluminium controls after 1400 DEG C, flue gas I is mixed with outside air and by the temperature of flue gas I
800 DEG C are down to hereinafter, obtaining flue gas II, wherein the velocity ratio of flue gas I and outside air is 1:4, the body of flue gas I and outside air
Product is than being 1:7.
Embodiment 3
It is almost the same with embodiment 1 the present embodiment provides a kind of calcining method of disposal of electrolytic aluminium waste cathode, difference
Be in:
The granular electrolytic aluminium waste cathode carbon block of 40-60mm is calcined into 60min at 2600 DEG C.Then, calcining is electrolysed
The give up temperature of flue gas I that cathode generates of aluminium controls after 1500 DEG C, flue gas I is mixed with outside air and by the temperature of flue gas I
800 DEG C are down to hereinafter, obtaining flue gas II, wherein the velocity ratio of flue gas I and outside air is 1:5, the body of flue gas I and outside air
Product is than being 1:9.
Embodiment 4
It is almost the same with embodiment 1 the present embodiment provides a kind of calcining method of disposal of electrolytic aluminium waste cathode, difference
Be in:
The granular electrolytic aluminium waste cathode carbon block of 60-80mm is calcined into 50min at 2700 DEG C.Then, calcining is electrolysed
The give up temperature of flue gas I that cathode generates of aluminium controls after 1600 DEG C, flue gas I is mixed with outside air and by the temperature of flue gas I
800 DEG C are down to hereinafter, obtaining flue gas II, wherein the velocity ratio of flue gas I and outside air is 1:8, the body of flue gas I and outside air
Product is than being 1:11.
Embodiment 5
It is almost the same with embodiment 1 the present embodiment provides a kind of calcining method of disposal of electrolytic aluminium waste cathode, difference
Be in:
The granular electrolytic aluminium waste cathode carbon block of 80-100mm is calcined into 30min at 3000 DEG C, then, by calcining electricity
It solves the give up temperature of flue gas I that cathode generates of aluminium to control after 1700 DEG C, flue gas I be mixed with outside air and by the temperature of flue gas I
Degree is down to 800 DEG C hereinafter, obtaining flue gas II, and wherein the velocity ratio of flue gas I and outside air is 1:10, flue gas I and outside air
Volume ratio be 1:15.
Comparative example 1
Using method disclosed in patent of invention CN105642649A, the electrolytic aluminium waste cathode carbon block of phase homogenous quantities is carried out high
Temperature disposition.
The content of resulting fluoride after handling in comparative example 1-5 and comparative example 1, yield and carbon contain
Amount, yield, the results are shown in Table 1:
The result of 1. different disposal method of table compares
As shown in Figure 1, compared to comparative example 1, providing method carries out calcining disposition to electrolytic aluminium waste cathode through the invention
Afterwards, the content (92-95%) of obtained fluoride and yield (32-34%) are above (respectively 90% He of comparative example 1
30%) content of the content (97-98%) of fixed carbon also above fixed carbon in carbon in comparative example 1, while in acquired carbon
(95%).
Thus illustrate, using the calcining method of disposal of electrolytic aluminium waste cathode provided by the invention, and in the prior art to cigarette
The method that gas takes water mist to handle is different, and the present invention passes through further in such a way that ambient atmos cool down to flue gas
Selection by winnowing classification, processing can either be dusted to flue gas and reaches discharge standard, and can recycle to obtain the carbon of high-purity
Element and fluoride, and yield is high, realizes the harmlessness disposing and resource utilization of electrolytic aluminium waste cathode.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from of the invention
Many other change and modification can be made in the case where spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (10)
1. a kind of calcining method of disposal of electrolytic aluminium waste cathode, characterized in that it comprises: generate calcining electrolytic aluminium waste cathode
The temperature of flue gas I control after 1200-1700 DEG C, the flue gas I is mixed with ambient atmos and by the temperature of the flue gas I
Degree is down to 800 DEG C hereinafter, obtain flue gas II, wherein the velocity ratio of the flue gas I and the ambient atmos is 1:2-10, it is described
The volume ratio of flue gas I and the ambient atmos is 1:3-15.
2. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 1, which is characterized in that calcine the electrolytic aluminium
The condition of useless cathode is by granular electrolytic aluminium waste cathode carbon block in calcining 30-90min at 2200-3000 DEG C.
3. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 2, which is characterized in that the granular electricity
The partial size for solving aluminium waste cathode carbon block is 1-100mm.
4. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 2, which is characterized in that the ambient atmos are
Outside air.
5. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 1, which is characterized in that obtaining the flue gas
After II, the flue gas II is isolated and purified by the way of selection by winnowing classification, and the flue gas VI after being gathered dust, then by institute
It states flue gas VI and carries out qualified discharge.
6. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 5, which is characterized in that the selection by winnowing classification
Mode is combination any one or more in sedimentation, cyclonic separation method and bag-ty pe dust collection.
7. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 6, which is characterized in that the flue gas II is first adopted
With flue gas III is obtained after sedimentation dedusting, the flue gas III obtains flue gas IV after using the dedusting of cyclonic separation method again, then described
Flue gas IV is dusted using bag-ty pe dust collection, obtains the flue gas VI.
8. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 7, which is characterized in that the flue gas IV is being adopted
Before being dusted with the bag-ty pe dust collection, the temperature of the flue gas IV is first down to 100-150 DEG C.
9. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 5, which is characterized in that the flue gas VI passes through
Qualified discharge is carried out after flue gas Water curtain filter.
10. the calcining method of disposal of electrolytic aluminium waste cathode according to claim 7, which is characterized in that using the cloth
Before bag process of cleaning is dusted, first the flue gas IV is cooled down by surface air cooler.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112938A (en) * | 2015-08-14 | 2015-12-02 | 昆明理工大学 | Method for volatilizing and removing fluoride from aluminum electrolytic cell waste carbon material |
| CN105642649A (en) * | 2015-12-30 | 2016-06-08 | 北京矿冶研究总院 | High-temperature treatment method for waste cathode of electrolytic aluminum |
| CN106269787A (en) * | 2016-08-05 | 2017-01-04 | 北京矿冶研究总院 | High-temperature continuous treatment method for disposing electrolytic aluminum waste cathode |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112938A (en) * | 2015-08-14 | 2015-12-02 | 昆明理工大学 | Method for volatilizing and removing fluoride from aluminum electrolytic cell waste carbon material |
| CN105642649A (en) * | 2015-12-30 | 2016-06-08 | 北京矿冶研究总院 | High-temperature treatment method for waste cathode of electrolytic aluminum |
| CN106269787A (en) * | 2016-08-05 | 2017-01-04 | 北京矿冶研究总院 | High-temperature continuous treatment method for disposing electrolytic aluminum waste cathode |
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