CN212901541U - Aluminum electrolysis carbon slag heat treatment system - Google Patents
Aluminum electrolysis carbon slag heat treatment system Download PDFInfo
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- CN212901541U CN212901541U CN202021592438.0U CN202021592438U CN212901541U CN 212901541 U CN212901541 U CN 212901541U CN 202021592438 U CN202021592438 U CN 202021592438U CN 212901541 U CN212901541 U CN 212901541U
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 156
- 239000002893 slag Substances 0.000 title claims abstract description 119
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 82
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000010438 heat treatment Methods 0.000 title claims abstract description 63
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 57
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 44
- 239000001301 oxygen Substances 0.000 claims abstract description 44
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000004411 aluminium Substances 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000003792 electrolyte Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 66
- 239000002245 particle Substances 0.000 claims description 53
- 229910052742 iron Inorganic materials 0.000 claims description 33
- 239000000428 dust Substances 0.000 claims description 20
- 239000013049 sediment Substances 0.000 claims description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 8
- 239000000779 smoke Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 150000001398 aluminium Chemical class 0.000 abstract description 2
- 238000010336 energy treatment Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000011244 liquid electrolyte Substances 0.000 description 10
- 239000002994 raw material Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Electrolytic Production Of Metals (AREA)
Abstract
The utility model provides an aluminium electroloysis carbon slag heat treatment system, including carbon slag supply unit, oxygen boosting heat treatment furnace and cooling magazine, the oxygen boosting heat treatment furnace including be used for in the oxygen boosting environment heating aluminium electroloysis carbon slag granule after the deironing rotary furnace, be located the charge door of rotary furnace left end, install in the combustor of rotary furnace right-hand member, set up in the discharge gate of rotary furnace left end or right-hand member, wherein, the discharge gate of carbon slag supply unit with the charge door intercommunication for to the oxygen boosting heat treatment furnace provides aluminium electroloysis carbon slag granule after the deironing, the granularity of this aluminium electroloysis carbon slag granule after the deironing is less than or equal to 150 mm; and the cooling material box is communicated with the discharge hole and is used for collecting the liquid aluminum electrolyte discharged from the rotary furnace. The aluminum electrolysis carbon slag heat treatment system has the characteristics of low energy consumption and treatment cost, small tail gas pollution, high production efficiency and the like, and is beneficial to industrial large-scale application.
Description
Technical Field
The utility model belongs to aluminium electroloysis solid useless resourceful treatment field, concretely relates to aluminium electroloysis carbon residue heat treatment system.
Background
Carbon slag is produced during the electrolysis of aluminum and is mainly produced in several forms: oxidation of the anode and shedding of carbon particles on the anode surface into the electrolyte to form carbon residue; aluminum in the electrolyte converts anode gas CO2And CO is reduced into C, and fine free carbon residue is formed in the electrolyte solution; carbon residue is formed by carbon block stripping caused by stripping of cathode carbon lining and sodium infiltration into cathode carbon block. The main harm is that a large amount of electric energy is wasted, air pollution is caused, and in order to reduce the harm, carbon slag in the electrolytic cell must be fished out in time in production. According to statistics, 15-20 kg of carbon slag is generated every ton of aluminum is produced, the domestic aluminum electrolysis yield in 2019 is 3500 ten thousand tons, the carbon slag amount is 52.5-70 ten thousand tons, the carbon slag belongs to dangerous waste and is forbidden to be stacked, and meanwhile, the carbon slag contains a large amount of electrolyte and solid carbon, so that the carbon slag is extremely necessary for harmless treatment and resource utilization.
At present, the carbon slag recycling treatment technology is mainly divided into a flotation method and a heat treatment method. The method for separating the carbon powder from the electrolyte powder by using the flotation agent is not complete in separation, and the purity of the carbon powder and the purity of the electrolyte are not high, so that the carbon powder and the electrolyte cannot be directly returned to an electrolytic cell for use.
The carbon slag heat treatment method is mainly used for treating carbon slag particles at high temperature. For example, chinese patent application CN107604383A discloses a method for extracting electrolyte from carbon slag by a smelting method, which comprises the following steps: heating the carbon slag in a smelting furnace to 1250-; wherein, in the smelting process, carbon is subjected to a combustion reaction, wherein 20-30% of the carbon is burnt; in addition, the smoke components generated in the smelting process comprise CO and CO2、H2O, NO, etc. Therefore, the existing carbon slag heat treatment technology has the defects of high energy consumption, high treatment cost, large tail gas pollution, low production efficiency and the like, and is not applied in large scale.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a heat treatment system for carbon slag in aluminum electrolysis to solve the above problems.
Therefore, the utility model provides a technical scheme: an aluminum electrolysis carbon slag heat treatment system comprises a carbon slag supply unit, an oxygen-enriched heat treatment furnace and a cooling material box, wherein the oxygen-enriched heat treatment furnace comprises a rotary furnace for heating aluminum electrolysis carbon slag particles subjected to iron removal in an oxygen-enriched environment, a feed inlet positioned at the left end of the rotary furnace, a burner arranged at the right end of the rotary furnace and a discharge outlet arranged at the left end or the right end of the rotary furnace, the discharge outlet of the carbon slag supply unit is communicated with the feed inlet and is used for providing the aluminum electrolysis carbon slag particles subjected to iron removal for the oxygen-enriched heat treatment furnace, and the particle size of the aluminum electrolysis carbon slag particles subjected to iron removal is smaller than or equal to 150 mm; and the cooling material box is communicated with the discharge hole and is used for collecting the liquid aluminum electrolyte discharged from the rotary furnace.
Wherein when the oxygen-enriched heat treatment furnace is in a working state, the oxygen content in the rotary furnace is maintained at 2-20% (volume fraction). The rotary furnace can be a horizontal rotary furnace, a flame melting furnace, an inclined rotary furnace and the like.
Based on the above, the combustor is a rotary flame type oxygen-enriched combustor.
Based on the above, the carbon slag supply unit comprises a belt conveyor, an iron remover, a carbon slag particle bin and a feeder, wherein the left end of the belt conveyor is provided with aluminum electrolysis carbon slag particles, and the particle size of the aluminum electrolysis carbon slag particles is less than or equal to 150 mm; the iron remover is arranged in the middle of the belt conveyor and is configured to remove iron elements in the aluminum electrolysis carbon slag particles to obtain the aluminum electrolysis carbon slag particles after iron removal; the right end of the belt conveyor is communicated with a feed inlet of the carbon slag particle bin; the discharge hole of the carbon slag particle bin is communicated with the feed inlet of the feeder; the discharge port of the feeder is communicated with the feed port. Preferably, the iron remover is a permanent magnet iron remover, and the feeder is a vibrating feeder.
Based on above-mentioned aluminium electroloysis carbon sediment heat treatment system, carbon sediment feed unit still includes to be configured into the belt feeder supplies with the carbon sediment breaker of aluminium electroloysis carbon sediment granule, the discharge gate of carbon sediment breaker with the left end of belt feeder intercommunication.
Based on above-mentioned aluminium electroloysis carbon sediment heat treatment system, further include a gas collecting channel, this gas collecting channel is installed batcher top and charge door top are used for collecting the deironing carbon sediment dust that produces when the batcher supplies to the charge door and the flue gas of oxygen boosting heat treatment furnace during operation release.
Based on the above, the outlet of the first gas-collecting hood is communicated with an electrolytic bath flue gas purification system through a pipeline.
Based on above-mentioned aluminium electroloysis carbon sediment heat treatment system, further include a second gas collecting channel and a dust remover, the second gas collecting channel is installed above the breaker, the export of second gas collecting channel passes through the pipeline with the import of dust remover communicates.
Based on the above, the cooling material box is placed on a ferry vehicle.
Therefore, compared with the prior art, the utility model provides an above-mentioned aluminium electroloysis carbon slag heat treatment system passes through carbon slag supply unit does the oxygen boosting heat treatment furnace provides the aluminium electroloysis carbon slag granule after the deironing of granularity less than or equal to 150 mm, and this aluminium electroloysis carbon slag granule after deironing gets into the charge door of oxygen boosting heat treatment furnace from the discharge gate of carbon slag supply unit, gets into in the rotary furnace through this charge door, and during the combustor during operation, the aluminium electroloysis carbon slag in the rotary furnace is in the oxygen boosting atmosphere, and the solid-state carbon in the carbon slag fully reacts, and complete combustion basically avoids or reduces the production of harmful gas CO to reduce environmental pollution; solid carbon impurities in the liquid electrolyte prepared by treating the aluminum electrolyte carbon slag particles subjected to iron removal in the oxygen-enriched heat treatment furnace are not more than 0.06 percent, and can be directly recycled; meanwhile, the solid carbon releases a large amount of heat in the combustion process, so that the energy consumption of carbon slag heat treatment is reduced, and the cost is reduced.
In addition, the feed inlet, the discharge outlet and the opening for installing the burner in the oxygen-enriched heat treatment furnace are three independent openings, so that the feeding and discharging operations are simplified, and the liquid electrolyte is convenient to discharge; meanwhile, the operation of removing the burner and adjusting the inclination angle of the burner and the like is not needed during feeding and discharging, the operation flow is simple, and the improvement of the production efficiency is facilitated.
Therefore, the utility model provides an aluminium electroloysis carbon sediment heat treatment system can reduce energy consumption and treatment cost, and tail gas pollution is little, characteristics such as production efficiency height are favorable to the industrial scale to be used.
Furthermore, the burner in the heat treatment furnace in the aluminum electrolysis carbon slag heat treatment system provided by the utility model is a rotary flame type oxygen-enriched burner, the flame is in a divergent state in the furnace, fully contacts with the carbon slag, has high thermal efficiency, and is in an oxygen-enriched atmosphere in the furnace, and the combustion and oxidation of solid carbon are good; meanwhile, the redundant oxygen can quickly and fully oxidize the carbon in the carbon slag to release heat, thereby reducing the energy consumption.
Furthermore, in the aluminum electrolysis carbon slag heat treatment system provided by the utility model, the first gas collecting hood is arranged above the feeder and above the feed inlet and is communicated with the electrolytic cell flue gas purification system through a pipeline, so that the waste gas generated by the aluminum electrolysis carbon slag heat treatment system is directly discharged to the electrolytic cell flue gas purification system and is discharged into the atmosphere after purification, and the equipment investment is low; the second gas-collecting hood is arranged above the crusher and connected with the dust remover through a pipeline, so that the pollution of dust materials to the environment is effectively reduced or avoided; therefore, the utility model provides an aluminium electroloysis carbon sediment heat treatment system does not have waste water, waste gas and arranges outward in whole use, and the environmental protection is pollution-free.
Further, in the aluminum electrolysis carbon slag heat treatment system provided by the utility model, the liquid electrolyte is discharged to the cooling material box and is transferred to a stock ground through the ferry vehicle to be cooled and stacked or directly returned to the electrolytic cell without cooling for use.
Drawings
Fig. 1 is a schematic structural diagram of an aluminum electrolysis carbon slag heat treatment system provided by the present invention, wherein an arrow in the diagram indicates a movement direction of a material.
In the figure, 1-a carbon slag crusher, 2-a permanent magnet iron remover, 3-a belt conveyor, 4-a carbon slag particle bin, 5-a vibrating feeder, 6-a rotary furnace, 7-a feeding port, 8-a rotary flame type oxygen-enriched burner, 9-a first gas collecting hood, 10-a second gas collecting hood, 11-a bag-type dust remover, 12-a discharging port, 13-a cooling material box, 14-a ferry vehicle and 15-an electrolytic tank flue gas purification system.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Referring to fig. 1, the utility model provides an aluminium electroloysis carbon sediment heat treatment system, including carbon sediment supply unit, oxygen boosting heat treatment furnace and cooling magazine 13, the discharge gate of carbon sediment supply unit with the charge door 7 intercommunication of oxygen boosting heat treatment furnace, the discharge gate 12 of oxygen boosting heat treatment furnace with cooling magazine 13 intercommunication.
Specifically, the carbon slag supply unit is mainly configured to supply the iron-removed aluminum electrolysis carbon slag particles to the oxygen-enriched heat treatment furnace, and the particle size of the iron-removed aluminum electrolysis carbon slag particles is less than or equal to 150 mm. The carbon residue supply unit comprises a carbon residue crusher 1, a permanent magnet iron remover 2, a belt conveyor 3, a carbon residue particle bin 4 and a vibrating feeder 5, a discharge port of the carbon residue crusher 1 is communicated with the left end of the belt conveyor 3, the permanent magnet iron remover 2 is installed in the middle of the belt conveyor 3, a right end of the belt conveyor 3 is communicated with a feed port of the carbon residue particle bin 4, a discharge port of the carbon residue particle bin 4 is communicated with a feed port of the vibrating feeder 5, and a discharge port of the feeder 5 is communicated with a feed port 7.
In this embodiment, carbon slag breaker 1, permanent magnetism de-ironing separator 2, carbon slag granule feed bin 4 and vibrating feeder 5 arrange from a left side to the right side in proper order, just the both ends of belt feeder 3 respectively with carbon slag breaker 1 with carbon slag granule feed bin 4 intercommunication. The right end of the belt conveyor 3 is positioned above the inlet of the vibrating feeder 5. The permanent magnet iron remover 2 is hung in the middle of the belt conveyor through a support rod (not shown) fixed on the belt conveyor 3. Carbon sediment granule feed bin 4 includes tube-shape feed bin and hopper-shaped feed bin down, the feed inlet of carbon sediment granule feed bin 4 set up in go up the top of tube-shape feed bin, the discharge gate of carbon sediment granule feed bin 4 set up in the bottom of hopper-shaped feed bin down. The feed inlet of carbon sediment granule feed bin 4 is located the below of belt feeder 3 right-hand member, conveniently will aluminium electroloysis carbon sediment granule after the deironing on the belt feeder 3 is poured into in the carbon sediment granule feed bin 4. The vibrating feeder 5 is arranged below the discharge port of the carbon slag particle bin 4, the left end of the vibrating feeder 5 is positioned below the discharge port of the carbon slag particle bin 4, and the right end of the vibrating feeder is positioned above the feed inlet 7 of the oxygen-enriched heat treatment furnace.
Therefore, in the using process of the carbon slag supply unit, firstly, aluminum electrolysis carbon slag raw materials are put into the carbon slag crusher 1, aluminum electrolysis carbon slag raw material particles with the particle size of less than or equal to 150 mm are formed through crushing treatment, and are discharged to the left end of the belt conveyor 3 through the discharge hole of the carbon slag crusher 1, the belt conveyor 3 moves to convey the aluminum electrolysis carbon slag raw material particles at the left end to the lower part of the permanent magnet iron remover 2, the permanent magnet iron remover 2 carries out iron removal treatment on the aluminum electrolysis carbon slag raw material particles to remove iron elements in the aluminum electrolysis carbon slag particles to obtain iron electrolysis carbon slag particles, the belt conveyor 3 continues to move to convey the iron electrolysis carbon slag particles formed on the belt conveyor to the right end and pour the iron electrolysis carbon slag particles into the feed hole of the carbon slag particle bin 4, and the aluminum electrolysis carbon slag particles after iron removal can be temporarily stored in the carbon slag particle bin 4, or pouring the aluminum electrolysis carbon slag particles into the vibrating feeder 5 through a discharge hole of the aluminum electrolysis carbon slag particle remover, and pouring the aluminum electrolysis carbon slag particles subjected to iron removal into the feeding hole 7 through the vibration transmission of the vibrating feeder 5.
The oxygen-enriched heat treatment furnace comprises a rotary furnace 6, a feeding port 7 positioned at the left end of the rotary furnace 6, a rotary flame type oxygen-enriched burner 8 arranged at the right end of the rotary furnace 6 and a discharge port 12 arranged at the left end of the rotary furnace 6. Wherein the rotary furnace 6 is used for heating the aluminum electrolysis carbon slag particles subjected to iron removal in an oxygen-rich environment, and the oxygen content in the rotary furnace 6 is maintained at 2-20% (volume fraction) during operation. The rotary furnace 6 may be a horizontal rotary furnace, a flame melting furnace, a tilting rotary furnace, or the like. In this embodiment, the rotary kiln 6 is a horizontal rotary kiln. The feed inlet 7 and the rotary flame type oxygen-enriched burner 8 are both independently arranged with the rotary furnace 6, the feed inlet 7 is connected with the rotary furnace 6 through a pipeline, and the rotary flame type oxygen-enriched burner 8 is inserted and installed at the opening at the right end of the rotary furnace 6, so that when the rotary furnace 6 is in a working state, the oxygen content in the furnace is maintained at 2-20% (volume fraction).
When the discharge port 12 is rotated to the bottom by the rotary furnace 6, the cooling material box 13 is positioned at the lower left of the discharge port 12, so that the liquid aluminum electrolyte discharged from the rotary furnace 6 can be conveniently collected. The cooling material box 13 is arranged on a ferry vehicle 14, so that the liquid aluminum electrolyte in the cooling material box 13 is convenient to transport. When liquid electrolyte is needed in an aluminum electrolysis working site, the liquid electrolyte is ferred to a sky parking space through the ferry vehicle 14, and the liquid aluminum electrolyte in the cooling material box 13 is quickly returned to the electrolytic cell for use through the overhead traveling crane, so that the energy consumption of aluminum electrolysis is reduced, the electrolyte is reused, and the production cost is greatly reduced. When the liquid electrolyte is not needed in the aluminum electrolysis working site, the liquid electrolyte in the cooling material box 13 is transferred to a stock ground for cooling and stacking through the ferry vehicle 14.
Therefore, when the oxygen-enriched heat treatment furnace is in a working state, the aluminum electrolysis carbon slag particles after iron removal enter the rotary furnace 6 through the feeding port 7, the rotary furnace 6 rotates at a speed of 0.5-5 r/min, after the rotary flame type oxygen-enriched burner 8 is ignited, flame is in a divergent state in the furnace, the temperature of the rotary furnace 6 is raised to 1000-1400 ℃, heat preservation is started, meanwhile, the oxygen content in the rotary furnace 6 is maintained at 2-20% (volume fraction), solid carbon in the aluminum electrolysis carbon slag particles after iron removal is completely separated from liquid electrolyte, the solid carbon is basically and quickly burnt out, a small amount of scum is on the surface of the liquid electrolyte, solid carbon impurities in the liquid electrolyte obtained after scum removal are not more than 0.06%, and the solid carbon impurities can be directly recovered to an electrolytic cell for use; and the solid carbon is fully oxidized and combusted in the oxygen-enriched environment in the rotary furnace 6, so that the generation of harmful gas CO is avoided or reduced, heat is released, and the energy consumption is reduced.
Further, the aluminum electrolysis carbon slag heat treatment system provided by the embodiment further comprises a first gas collecting hood 9 and an electrolytic bath flue gas purification system 15, wherein the first gas collecting hood 9 is installed above the vibrating feeder 5 and above the feeding port 9 and is used for collecting iron-removed carbon slag dust generated when the vibrating feeder 5 feeds materials into the feeding port 9 and flue gas released when the oxygen-enriched heat treatment furnace works. The electrolytic cell flue gas purification system 15 is connected with the outlet of the first gas-collecting hood 9 through a pipeline.
Further, the aluminum electrolysis carbon slag heat treatment system provided by the embodiment further comprises a second gas collecting hood 10 and a bag-type dust collector 11 connected with the second gas collecting hood 10. The second gas collecting hood 10 is installed above the carbon residue crusher 1, an outlet of the second gas collecting hood 10 is communicated with an inlet of the bag-type dust collector 11 through a pipeline, and the bag-type dust collector 11 further comprises an air outlet communicated with surrounding air and a discharge hole located at the bottom end. The second gas collecting hood 10 is mainly used for collecting carbon slag raw material dust generated by pouring aluminum electrolysis carbon slag raw material into the carbon slag crusher 1 and working of the carbon slag crusher 1, the carbon slag raw material dust is conveyed into the bag-type dust remover 11 through a pipeline, the carbon slag raw material dust is deposited in the bag-type dust remover 11 to form carbon slag raw material powder and waste gas, and the carbon slag raw material powder is discharged from a discharge port of the bag-type dust remover 11 and then returns to the left end of the belt conveyor 3 for recycling; the exhaust gas is discharged to the air from the air outlet of the bag-type dust collector 11.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (8)
1. An aluminium electroloysis carbon sediment heat treatment system which characterized in that: the device comprises a carbon slag supply unit, an oxygen-enriched heat treatment furnace and a cooling material box, wherein the oxygen-enriched heat treatment furnace comprises a rotary furnace for heating aluminum electrolysis carbon slag particles subjected to iron removal in an oxygen-enriched environment, a feed inlet positioned at the left end of the rotary furnace, a burner arranged at the right end of the rotary furnace and a discharge outlet arranged at the left end or the right end of the rotary furnace, the discharge outlet of the carbon slag supply unit is communicated with the feed inlet and is used for providing the aluminum electrolysis carbon slag particles subjected to iron removal for the oxygen-enriched heat treatment furnace, and the particle size of the aluminum electrolysis carbon slag particles subjected to iron removal is less than or equal to 150 mm; and the cooling material box is communicated with the discharge hole and is used for collecting the liquid aluminum electrolyte discharged from the rotary furnace.
2. The aluminum electrolysis carbon slag heat treatment system according to claim 1, wherein: the combustor is a rotary flame type oxygen-enriched combustor.
3. The aluminum electrolysis carbon slag heat treatment system according to claim 1 or 2, wherein: the carbon slag supply unit comprises a belt conveyor, an iron remover, a carbon slag particle bin and a feeder, wherein the left end of the belt conveyor is provided with aluminum electrolysis carbon slag particles, and the granularity of the aluminum electrolysis carbon slag particles is less than or equal to 150 mm; the iron remover is arranged in the middle of the belt conveyor and is configured to remove iron elements in the aluminum electrolysis carbon slag particles to obtain the aluminum electrolysis carbon slag particles after iron removal; the right end of the belt conveyor is communicated with a feed inlet of the carbon slag particle bin; the discharge hole of the carbon slag particle bin is communicated with the feed inlet of the feeder; the discharge port of the feeder is communicated with the feed port.
4. The aluminum electrolysis carbon slag heat treatment system according to claim 3, wherein: the carbon slag supply unit further comprises a carbon slag crusher configured to supply the belt conveyor with the aluminum electrolysis carbon slag particles, and a discharge port of the carbon slag crusher is communicated with the left end of the belt conveyor.
5. The aluminum electrolysis carbon slag heat treatment system according to claim 4, wherein: the first gas collecting hood is arranged above the feeding machine and above the feeding port and used for collecting iron-carbon-residue-removing dust generated when the feeding machine feeds materials to the feeding port and smoke released when the oxygen-enriched heat treatment furnace works.
6. The aluminum electrolysis carbon slag heat treatment system according to claim 5, wherein: the outlet of the first gas-collecting hood is communicated with an electrolytic bath flue gas purification system through a pipeline.
7. The aluminum electrolysis carbon slag heat treatment system according to claim 5, wherein: the crusher further comprises a second gas collecting hood and a dust remover, wherein the second gas collecting hood is arranged above the crusher, and an outlet of the second gas collecting hood is communicated with an inlet of the dust remover through a pipeline.
8. The aluminum electrolysis carbon slag heat treatment system according to claim 7, wherein: the cooling material box is placed on a ferry vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021592438.0U CN212901541U (en) | 2020-08-04 | 2020-08-04 | Aluminum electrolysis carbon slag heat treatment system |
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| CN202021592438.0U CN212901541U (en) | 2020-08-04 | 2020-08-04 | Aluminum electrolysis carbon slag heat treatment system |
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| CN212901541U true CN212901541U (en) | 2021-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232031A (en) * | 2021-12-29 | 2022-03-25 | 云南云铝海鑫铝业有限公司 | Method for extracting electrolyte by rapidly combusting and decarbonizing carbon slag waste |
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2020
- 2020-08-04 CN CN202021592438.0U patent/CN212901541U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232031A (en) * | 2021-12-29 | 2022-03-25 | 云南云铝海鑫铝业有限公司 | Method for extracting electrolyte by rapidly combusting and decarbonizing carbon slag waste |
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