CN215249605U - System for recovering cryolite by combined treatment of aluminum electrolysis overhaul residues and aluminum ash - Google Patents
System for recovering cryolite by combined treatment of aluminum electrolysis overhaul residues and aluminum ash Download PDFInfo
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- CN215249605U CN215249605U CN202120627047.6U CN202120627047U CN215249605U CN 215249605 U CN215249605 U CN 215249605U CN 202120627047 U CN202120627047 U CN 202120627047U CN 215249605 U CN215249605 U CN 215249605U
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 145
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 229910001610 cryolite Inorganic materials 0.000 title claims abstract description 70
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 13
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000002893 slag Substances 0.000 claims abstract description 61
- 239000004411 aluminium Substances 0.000 claims abstract description 44
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 43
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000011737 fluorine Substances 0.000 claims abstract description 42
- 239000013049 sediment Substances 0.000 claims abstract description 25
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 22
- 238000007654 immersion Methods 0.000 claims description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 31
- 239000002253 acid Substances 0.000 claims description 24
- 239000003513 alkali Substances 0.000 claims description 22
- 238000000498 ball milling Methods 0.000 claims description 19
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 230000001376 precipitating effect Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002386 leaching Methods 0.000 description 29
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 12
- 238000000926 separation method Methods 0.000 description 11
- 238000002791 soaking Methods 0.000 description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000008439 repair process Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910017083 AlN Inorganic materials 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 2
- 101100002917 Caenorhabditis elegans ash-2 gene Proteins 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 241001536352 Fraxinus americana Species 0.000 description 1
- 241000565357 Fraxinus nigra Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The utility model discloses a system for recovering cryolite by combined treatment of aluminum electrolysis overhaul slag and aluminum ash. The system comprises an overhaul slag treatment module, a cyanogen breaking and fluorine precipitating module, an aluminum ash treatment module and a cryolite synthesis module, wherein the overhaul slag treatment module is connected with the aluminum ash treatment module through the cyanogen breaking and fluorine precipitating module, and the overhaul slag treatment module and the aluminum ash treatment module are both connected with the cryolite synthesis module. The utility model discloses a carry out innocent treatment respectively to overhaul sediment and aluminium ash, retrieve the aluminium in fluorine in the overhaul sediment and the aluminium ash to the synthetic cryolite of production returns the aluminium cell, has both realized the resourceful recovery of harmful waste residue, has reduced electrolytic aluminum's manufacturing cost again.
Description
Technical Field
The utility model relates to an electrolytic aluminum handles technical field useless admittedly, especially relates to a system that aluminium electroloysis overhaul sediment and aluminium ash combined treatment retrieved cryolite.
Background
Along with the improvement of the aluminum yield in China, the external discharge amount of the overhaul slag is increased year by year, and 15-25kg of overhaul slag is discharged per 1 ton of aluminum produced. Overhaul residues are solid hazardous wastes inevitable in the production of aluminum electrolysis, wherein the main toxic substances are soluble fluorides and cyanides, which are extremely harmful to the environment including soil, water and atmosphere.
The treatment of the overhaul slag mainly comprises a fire method and a wet method. The pyrogenic process can realize the removal and recovery of fluoride to a certain extent, but due to the large investment and unstable system operation, further industrial application and development of the pyrogenic process are limited. The wet method is to leach harmful substances such as F and CN in the overhaul residues by a method such as water leaching, alkali leaching or acid leaching and the like, and then to perform step-by-step treatment, but electrolytes such as sodium fluoride and the like in the overhaul residues are not effectively recycled, so that the overhaul residues do not have good economy.
The aluminum ash is scum floating on the aluminum liquid of the electrolytic bath generated in the aluminum electrolysis process. The aluminum ash is mainly divided into primary aluminum ash (white ash) and secondary aluminum ash (black ash). The primary aluminum ash is aluminum slag generated in the process of producing aluminum from original aluminum, and the primary aluminum ash mainly comprises metallic aluminum and aluminum oxide, wherein the content of the metallic aluminum can reach 30-70%. The secondary aluminum ash is the residue of primary aluminum ash or other waste aluminum after extracting metal aluminum by a physical method or a chemical method, has low content of metal aluminum and relatively complex components, and mainly comprises a small amount of aluminum (the content is less than 10 wt%), a salt flux (more than 10%), an oxide and aluminum nitride (the content is 15-30 wt%). The aluminum ash is a good resource, but has not been paid enough attention all the time, pollutes the environment and becomes dangerous waste, and the secondary aluminum ash contains a large amount of aluminum oxide, aluminum nitride and salt and has high utilization value, so that the great significance of finding a good method for comprehensively utilizing the secondary aluminum ash resource is realized.
Chinese patent CN207394865 provides a treatment system for overhaul slag of aluminum electrolysis cell, including pretreatment station, grinding station, cement kiln incineration treatment furnace system and waste gas treatment system, chinese patent CN204866824 provides a recycling harmless treatment system for overhaul slag of aluminum electrolysis cell, including first reaction bin, second reaction bin, third reaction bin, alkali liquor bin, flotation device and solid-liquid separation device, the whole procedure of the above-mentioned system is complicated, the floor area is large, and the traditional technology is used for broken grinding, the overhaul slag of aluminum electrolysis cell is difficult to reach the requirement of further removing fluorine and removing cyanogen particle size or increase the operation time.
At present, overhaul slag and aluminum ash are separately treated to respectively obtain corresponding final products, the process flow of single production is long, and the products are difficult to be exported, so that better economic benefits cannot be obtained. The valuable components in the two are recovered and then are combined to produce a new product, the obtained product is reused in electrolytic aluminum, the resource recovery of harmful waste residues is effectively realized, and the production cost of the electrolytic aluminum is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for aluminium electroloysis overhaul sediment and aluminium ash combined treatment retrieve cryolite. According to the utility model discloses a system for retrieve cryolite through carrying out innocent treatment respectively to overhaul sediment and aluminium ash, retrieves the aluminium in fluorine in the sediment of overhaul and the aluminium ash to produce synthetic cryolite and return the aluminium cell, both realized the resourceful recovery of harmful waste residue, reduced electrolytic aluminum's manufacturing cost again, the utility model discloses a technical scheme as follows:
according to the utility model discloses an aspect provides a system for aluminium electroloysis overhaul sediment and aluminium ash combined treatment retrieve cryolite, the system includes overhaul sediment processing module, broken cyanogen heavy fluorine module, aluminium ash processing module, cryolite synthesis module, overhaul sediment processing module passes through broken cyanogen heavy fluorine module with aluminium ash processing module connects, overhaul sediment processing module with aluminium ash processing module all with the cryolite synthesis module is connected.
Preferably, the overhaul slag treatment module comprises an overhaul slag crushing ball-milling device, an overhaul slag water immersion tank, a first pressure filter, an overhaul slag acid immersion tank, a third pressure filter and an HF absorption device, the overhaul slag crushing ball-milling device is connected with the overhaul slag water immersion tank through a first elevator, a discharge port of the overhaul slag water immersion tank is connected with the first pressure filter, a discharge port of the first pressure filter is connected with the overhaul slag acid immersion tank through a third elevator, a liquid outlet of the first pressure filter is connected with the cyanogen-breaking fluorine-precipitating module, a discharge port of the overhaul slag acid immersion tank is connected with the third pressure filter, a gas outlet of the overhaul slag acid immersion tank is connected with the HF absorption device, and a liquid outlet of the HF absorption device is connected with the cryolite synthesis module.
Preferably, broken cyanogen sinks fluorine module and breaks cyanogen and sinks fluorine pressure filter including broken cyanogen and sink fluorine groove, broken cyanogen sink the feed inlet in fluorine groove with the liquid outlet of first pressure filter is connected, broken cyanogen sink the discharge gate in fluorine groove with broken cyanogen sink the fluorine pressure filter and be connected, broken cyanogen sink the discharge gate of fluorine pressure filter with aluminium ash processing module is connected.
Preferably, the aluminum ash processing module comprises an aluminum ash crushing ball-milling device, an aluminum ash water soaking tank, a second filter press, an aluminum ash alkali soaking tank and a fourth filter press, the aluminum ash crushing ball-milling device is connected with the aluminum ash water soaking tank through a second elevator, a discharge port of the aluminum ash water soaking tank is connected with the second filter press, a discharge port of the second filter press is connected with the aluminum ash alkali soaking tank through the fourth elevator, a liquid inlet of the aluminum ash alkali soaking tank is connected with the cyanogen-breaking fluorine-precipitating module, and a liquid outlet of the aluminum ash alkali soaking tank is connected with the cryolite synthesizing module.
Preferably, the cryolite synthesis module includes cryolite synthesizer, cryolite separator, cryolite conveyer and desiccator, cryolite synthesizer's feed inlet respectively with HF absorbing device and fourth pressure filter are connected, cryolite synthesizer's discharge gate with cryolite separator connects, cryolite separator's discharge gate passes through cryolite conveyer with the desiccator is connected.
The above technical scheme of the utility model, have as follows and show the effect:
(1) the utility model respectively carries out innocent treatment on overhaul residues and aluminum ash, soluble fluorine in the overhaul residues can obtain calcium fluoride products through precipitation, and insoluble fluorine can obtain hydrofluoric acid through an acid leaching process as a raw material for synthesizing cryolite; the harmful substance in the aluminum ash can be used as an aluminum source to synthesize cryolite after being treated by aluminum nitride. The overhaul slag and the aluminum ash are jointly treated, fluorine in the overhaul slag and aluminum in the aluminum ash are respectively recovered to synthesize cryolite, and the cryolite can be returned to the electrolytic cell for utilization, so that the harmless and high-value resource recovery of waste slag is realized, and the production cost of electrolytic aluminum is reduced;
(2) the utility model discloses form strong alkaline solution when overhaul sediment water logging is handled, strong alkaline solution can be used to the alkaline leaching process of aluminium ash processing system, and aluminium composition if aluminium, aluminium oxide and aluminium nitride take place the reaction in the aluminium ash, has also got rid of the main harmful component aluminium nitride in the aluminium ash when retrieving aluminium, the consumption of a large amount of alkali lye when having avoided the independent processing aluminium ash, greatly reduced the treatment cost of aluminium ash, realized the abundant recycle of aluminium composition simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
1-overhaul slag crushing ball-milling device; 2-an aluminum ash crushing and ball-milling device; 31-a first hoist; 32-a second hoist; 33-a third hoist; 34-a fourth hoist; 4-overhaul the dreg dipping tank; 5-acid leaching tank for overhaul residues; 6-aluminum ash water immersion tank; 7-an aluminum ash alkaline leaching tank; 81-a first filter press; 82-a second filter press; 83-a third filter press; 84-a fourth filter press; 85-cyanogen breaking and fluorine precipitating filter press; 9-HF absorber; 10-cryolite synthesis unit; 11-a cyanogen breaking fluorine precipitation tank; 12-a cryolite separation unit; 13-a cryolite conveyor; 14-a dryer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and by referring to preferred embodiments. It should be understood, however, that the numerous specific details set forth in the specification are merely set forth to provide a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As shown in figure 1, according to the utility model discloses a system for aluminium electroloysis overhaul sediment and aluminium ash combined treatment retrieve cryolite, the system is including overhaul sediment processing module, broken cyanogen heavy fluorine module, aluminium ash processing module, cryolite synthesis module, and overhaul sediment processing module is connected with aluminium ash processing module through broken cyanogen heavy fluorine module, and overhaul sediment processing module and aluminium ash processing module all are connected with cryolite synthesis module.
The overhaul slag treatment module comprises an overhaul slag crushing ball-milling device 1, an overhaul slag water immersion tank 4, a first pressure filter 81, an overhaul slag acid immersion tank 5, a third pressure filter 83 and an HF absorption device 9, the overhaul slag crushing ball-milling device 1 is connected with the overhaul slag water immersion tank 4 through a first lifting machine 31, a discharge port of the overhaul slag water immersion tank 4 is connected with the first pressure filter 81, a discharge port of the first pressure filter 81 is connected with the overhaul slag acid immersion tank 5 through a third lifting machine 33, a liquid outlet of the first pressure filter 81 is connected with a cyanogen-breaking fluorine-precipitating module, a discharge port of the overhaul slag acid immersion tank 5 is connected with the third pressure filter 83, a gas outlet of the overhaul slag acid immersion tank 5 is connected with the HF absorption device 9, and a liquid outlet of the HF absorption device 9 is connected with an ice crystal stone synthesis module.
Broken cyanogen sinks fluorine module and includes broken cyanogen and sink fluorine groove 11 and broken cyanogen and sink fluorine pressure filter 85, and the feed inlet that breaks cyanogen and sink fluorine groove 11 is connected with the liquid outlet of first pressure filter 81, and the discharge gate that breaks cyanogen and sink fluorine groove 11 is connected with broken cyanogen and sink fluorine pressure filter 85, and the discharge gate that breaks cyanogen and sink fluorine pressure filter 85 is connected with aluminium ash processing module.
The aluminum ash processing module comprises an aluminum ash crushing ball milling device 2, an aluminum ash water immersion groove 6, a second filter press 82, an aluminum ash alkali immersion groove 7 and a fourth filter press 84, the aluminum ash crushing ball milling device 2 is connected with the aluminum ash water immersion groove 6 through a second hoister 32, a discharge port of the aluminum ash water immersion groove 6 is connected with the second filter press 82, a discharge port of the second filter press 82 is connected with the aluminum ash alkali immersion groove 7 through a fourth hoister 34, a liquid inlet of the aluminum ash alkali immersion groove 7 is connected with a cyanogen-breaking fluorine-precipitating module, and a liquid outlet of the aluminum ash alkali immersion groove 7 is connected with a cryolite synthesis module.
The cryolite synthesis module comprises a cryolite synthesis device 10, a cryolite separation device 12, a cryolite conveyor 13 and a dryer 14, wherein a feed inlet of the cryolite synthesis device 10 is respectively connected with the HF absorption device 9 and the fourth filter press 84, a discharge outlet of the cryolite synthesis device 10 is connected with the cryolite separation device 12, and a discharge outlet of the cryolite separation device 12 is connected with the dryer 14 through the cryolite conveyor 13.
The utility model discloses when using, will overhaul sediment and aluminium ash and carry out broken ball-milling through the broken ball-milling device of overhaul sediment 1 and the broken ball-milling device of aluminium ash 2 respectively, the broken ball-milling device of overhaul sediment 1 carries the material to overhaul 4 water logging processes in sediment water immersion tank through first lifting machine 31, the broken ball-milling device of aluminium ash 2 carries the material to aluminium ash water immersion tank 6 through second lifting machine 32 and carries out the water logging process, after the water logging process, overhaul sediment water immersion tank 4 carries out solid-liquid separation with the thick liquids through the pump to first pressure filter 81 and obtains overhaul sediment water immersion liquid and overhaul sediment water immersion liquid, aluminium ash water immersion tank 6 carries out solid-liquid separation through the pump to second pressure filter 82 and obtains aluminium ash water immersion liquid and aluminium ash water immersion slag. Conveying the overhaul residue water immersion liquid to a cyanogen breaking and fluorine precipitating tank 11 through a pump for cyanogen breaking and fluorine precipitating treatment, conveying a product of the cyanogen breaking and fluorine precipitating tank to a fifth filter press 85 through the pump for solid-liquid separation to obtain a calcium fluoride product and a liquid after cyanogen breaking and fluorine precipitating, and conveying the liquid after cyanogen breaking and fluorine precipitating to an aluminum ash alkali immersion tank 7 through the pump for alkali immersion; the aluminum ash water leaching solution is returned to the aluminum ash water leaching tank 6 for cycle leaching. And conveying the obtained overhaul slag water leaching residue to an overhaul slag acid leaching tank 5 through a third lifting machine 33 for an acid leaching process, conveying the aluminum ash water leaching residue to an aluminum ash alkali leaching tank 7 through a fourth lifting machine 34 for an alkali leaching process, conveying the slurry obtained from the overhaul slag acid leaching tank to a third filter press 83 through a pump to obtain overhaul slag acid leaching liquid and overhaul slag acid leaching residue, and conveying the slurry obtained from the aluminum ash alkali leaching tank to a fourth filter press 84 through a pump to perform solid-liquid separation to obtain aluminum ash alkali leaching liquid and aluminum ash alkali leaching residue. The major repair slag acid leaching residue and the aluminum ash alkaline leaching residue are harmless, the major repair slag acid leaching solution returns to a major repair slag acid leaching tank 5 for cyclic leaching, the aluminum ash alkaline leaching solution is conveyed to a cryolite synthesis device 10 through a pump, HF obtained by the reaction of the major repair slag acid leaching tank 5 is absorbed by an HF absorption device 9 to obtain a hydrofluoric acid solution, the hydrofluoric acid solution is conveyed to the cryolite synthesis device 10 through the pump, and then cryolite synthesis reaction is carried out to obtain cryolite slurry. The cryolite slurry is subjected to solid-liquid separation by a cryolite separation device 12, and is conveyed to a dryer 14 through a cryolite conveyor 13 for drying, so that a cryolite product is obtained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A system for recovering cryolite by combined treatment of aluminum electrolysis overhaul slag and aluminum ash is characterized in that: including overhaul sediment processing module, broken cyanogen heavy fluorine module, aluminium ash processing module, cryolite synthesis module, overhaul sediment processing module passes through broken cyanogen heavy fluorine module with aluminium ash processing module connects, overhaul sediment processing module with aluminium ash processing module all with cryolite synthesis module connects.
2. The system for recovering cryolite by combined treatment of aluminum electrolysis overhaul slag and aluminum ash according to claim 1, wherein: the overhaul slag treatment module comprises an overhaul slag crushing ball-milling device, an overhaul slag water immersion tank, a first pressure filter, an overhaul slag acid immersion tank, a third pressure filter and an HF absorption device, wherein the overhaul slag crushing ball-milling device is connected with the overhaul slag water immersion tank through a first lifting machine, a discharge port of the overhaul slag water immersion tank is connected with the first pressure filter, a discharge port of the first pressure filter is connected with the overhaul slag acid immersion tank through a third lifting machine, a liquid outlet of the first pressure filter is connected with a cyanogen-breaking fluorine-precipitating module, a discharge port of the overhaul slag acid immersion tank is connected with the third pressure filter, a gas outlet of the overhaul slag acid immersion tank is connected with the HF absorption device, and a liquid outlet of the HF absorption device is connected with the cryolite synthesis module.
3. The system for recovering cryolite by combined treatment of aluminum electrolysis overhaul slag and aluminum ash as claimed in claim 2, wherein: broken cyanogen sinks fluorine module and sinks fluorine pressure filter including broken cyanogen and sink fluorine groove and broken cyanogen, broken cyanogen sink the feed inlet in fluorine groove with the liquid outlet of first pressure filter is connected, broken cyanogen sink the discharge gate in fluorine groove with broken cyanogen sinks the fluorine pressure filter to be connected, broken cyanogen sink the discharge gate of fluorine pressure filter with aluminium ash processing module connects.
4. The system for recovering cryolite by combined treatment of aluminum electrolysis overhaul slag and aluminum ash as claimed in claim 3, wherein: the aluminum ash processing module comprises an aluminum ash crushing ball-milling device, an aluminum ash water immersion tank, a second filter press, an aluminum ash alkali immersion tank and a fourth filter press, the aluminum ash crushing ball-milling device is connected with the aluminum ash water immersion tank through a second elevator, a discharge port of the aluminum ash water immersion tank is connected with the second filter press, a discharge port of the second filter press is connected with the aluminum ash alkali immersion tank through the fourth elevator, a liquid inlet of the aluminum ash alkali immersion tank is connected with a cyanogen-breaking fluorine-precipitating module, and a liquid outlet of the aluminum ash alkali immersion tank is connected with a cryolite synthesis module.
5. The system for recovering cryolite by combined treatment of aluminum electrolysis overhaul slag and aluminum ash as claimed in claim 4, wherein: the cryolite synthesis module includes cryolite synthesizer, cryolite separator, cryolite conveyer and desiccator, cryolite synthesizer's feed inlet respectively with HF absorbing device and fourth pressure filter are connected, cryolite synthesizer's discharge gate with cryolite separator connects, cryolite separator's discharge gate passes through the cryolite conveyer with the desiccator is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120627047.6U CN215249605U (en) | 2021-03-26 | 2021-03-26 | System for recovering cryolite by combined treatment of aluminum electrolysis overhaul residues and aluminum ash |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893462A (en) * | 2022-10-31 | 2023-04-04 | 山西翌佳环保科技有限公司 | Method and equipment for recovering electrolytic aluminum waste slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115893462A (en) * | 2022-10-31 | 2023-04-04 | 山西翌佳环保科技有限公司 | Method and equipment for recovering electrolytic aluminum waste slag |
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Address after: 242300 intersection of Dongcheng Avenue and Dongcheng Road, heli Park, Ningguo Economic and Technological Development Zone, Ningguo City, Xuancheng City, Anhui Province Patentee after: Anhui Boshike Environmental Protection Technology Co.,Ltd. Country or region after: China Address before: No. 12, Kexing Road, high tech Zone, Nanning, Guangxi 530000 Patentee before: GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Country or region before: China |
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Effective date of registration: 20240508 Address after: 242300 intersection of Dongcheng Avenue and Dongcheng Road, heli Park, Ningguo Economic and Technological Development Zone, Ningguo City, Xuancheng City, Anhui Province Patentee after: Anhui Boshike Environmental Protection Technology Co.,Ltd. Country or region after: China Patentee after: Guangxi Boshike Environmental Technology Co.,Ltd. Address before: 242300 intersection of Dongcheng Avenue and Dongcheng Road, heli Park, Ningguo Economic and Technological Development Zone, Ningguo City, Xuancheng City, Anhui Province Patentee before: Anhui Boshike Environmental Protection Technology Co.,Ltd. Country or region before: China |