CN211169878U - Equipment for regenerating aluminum fluoride - Google Patents
Equipment for regenerating aluminum fluoride Download PDFInfo
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- CN211169878U CN211169878U CN201922010622.3U CN201922010622U CN211169878U CN 211169878 U CN211169878 U CN 211169878U CN 201922010622 U CN201922010622 U CN 201922010622U CN 211169878 U CN211169878 U CN 211169878U
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Abstract
The utility model provides a regenerated aluminum fluoride equipment, which solves the problem of low utilization efficiency of electrolytic aluminum solid waste. The utility model comprises a negative pressure bin for transferring electrolytic aluminum carbon slag, a belt conveyor matched with the negative pressure bin is arranged at the rear part of the negative pressure bin, a ball mill matched with the belt conveyor is arranged at the rear end of the belt conveyor, a discharge port of the ball mill is connected with a feed port of a fluorine leaching reaction tank, a discharge port of the fluorine leaching reaction tank is connected with a feed port of a first flotation machine, a lower tailing outlet at the bottom of the first flotation machine is connected with a feed port of a magnetic separator, and a discharge port of the magnetic separator is connected with a first dewatering machine through a pipeline; the discharge port of the first dehydrator is connected with the feed inlet of the first reaction tank for primary sodium removal, the discharge port of the first reaction tank is connected with the feed inlet of the second dehydrator, the discharge port of the second dehydrator is connected with the feed inlet of the water washing tank, the discharge port of the water washing tank is connected with the feed inlet of the third dehydrator, and the discharge port of the third dehydrator is connected with the feed inlet of the dryer.
Description
Technical Field
The utility model relates to the technical field of solid waste recycling of electrolytic aluminum, in particular to a regenerated aluminum fluoride device.
Background
At present, the electrolytic aluminum industry in China can generate a large amount of waste anode slag every year, the statistics is incomplete, 25 ten thousand tons of solid waste can be generated every year, and about 200 ten thousand tons of solid waste can be stockpiled in the past years. Most of the solid wastes are waste anode slag, and the anode slag is generated in the process of aluminum electrolysis, so that the aluminum liquid and anode carbon are reacted and peeled off, and the anode slag falls into the electrolyte and is mixed with a large amount of electrolyte. The components of the electrolyte mainly comprise carbon powder and electrolyte. Because the waste water cannot be separated and recovered effectively, the waste water can only be accumulated or buried in soil in a large amount. The electrolyte contains fluorine-containing compounds such as sodium fluoride, magnesium fluoride and cryolite. At present, the main recycling means of solid waste is used for recycling cryolite, but the demand of cryolite in electrolytic aluminum production is relatively low, so that a large part of solid waste cannot be completely recycled, the unused solid waste is blown by wind, exposed to the sun and rain for a long time, and the fluorides are dissolved in water and immersed in soil to pollute the environment, thereby bringing great troubles to the production and the life of people.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of lower utilization efficiency of the solid waste of the electrolytic aluminum in the background art, the utility model provides a regenerated aluminum fluoride device.
The technical scheme of the utility model is that: the regenerated aluminum fluoride equipment comprises a negative pressure bin for transferring electrolytic aluminum carbon slag, wherein a matched belt conveyor is arranged at the rear part of the negative pressure bin, a matched ball mill is arranged at the rear end of the belt conveyor, a discharge port of the ball mill is connected with a feed port of a fluorine leaching reaction tank, a discharge port of the fluorine leaching reaction tank is connected with a feed port of a first flotation machine, a fluorine precipitation agent and a flotation agent are added into the first flotation machine, a lower tailing outlet at the bottom of the first flotation machine is connected with a feed port of a magnetic separator, and a discharge port of the magnetic separator is connected with a first dewatering machine through a pipeline; the discharge port of the first dehydrator is connected with the feed inlet of the first reaction tank for primary sodium removal, the discharge port of the first reaction tank is connected with the feed inlet of the second dehydrator, the discharge port of the second dehydrator is connected with the feed inlet of the water washing tank, the discharge port of the water washing tank is connected with the feed inlet of the third dehydrator, and the discharge port of the third dehydrator is connected with the feed inlet of the dryer.
The upper concentrate outlet of the first flotation machine is connected with the feed inlet of a second reaction tank for removing fluorine ions in carbon powder, the discharge outlet of the second reaction tank is connected with the feed inlet of a second flotation machine, and the discharge outlet of the second flotation machine is connected with the feed inlet of a fourth dewatering machine.
And the water outlets of the first dehydrator and the fourth dehydrator are connected with the first circulating water tank.
And the water outlets of the second dehydrator and the third dehydrator are connected with a feed inlet of the sodium removing equipment, and the water outlet of the sodium removing equipment is connected with the second circulating water tank.
A first buffer tank is arranged between the magnetic separator and the first dehydrator.
And a second buffer tank is arranged between the second flotation machine and the fourth dehydrator.
The utility model has the advantages that: the utility model discloses a to what produced solid useless (electrolytic aluminum carbon residue) of electrolytic aluminum through, fluorine leach, sink fluorine, washing, take off sodium etc. can be with the comparatively thorough separation from the carbon residue powder of fluorine, obtain the higher aluminium fluoride of value, can also obtain the higher sodium salt of purity, carbon dust simultaneously, realize the biggest recycle of electrolytic aluminum carbon residue. Because the solid waste is adopted to produce the aluminum fluoride, the cost of the aluminum fluoride is greatly reduced compared with the production of the aluminum fluoride on the market, the method has extremely high economic value and economic benefit, and the problems of storage of the solid waste and environmental pollution are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of the flow of the present invention.
The figure shows that 1, a negative pressure bin, 2, a magnetic belt conveyor, 3, a ball mill, 4, a fluorine leaching reaction tank, 5, a first flotation machine, 6, a magnetic separator, 7, a first buffer tank, 8, a first dehydrator, 9, a first reaction tank, 10, a second dehydrator, 11, a water washing tank, 12, a third dehydrator, 13, a dryer, 14, finished aluminum fluoride, 15, a first circulating water tank, 16, a second circulating water tank, 17, sodium removal equipment, 18, pure sodium salt, 19, a second reaction tank, 20, a second flotation machine, 21, a second buffer tank, 22, a fourth dehydrator, 23 and finished carbon powder.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
Example 1: the equipment for regenerating aluminum fluoride is shown in figure 1 and comprises a negative pressure bin 1 for transferring electrolytic aluminum carbon slag, wherein a matched belt conveyor is arranged at the rear part of the negative pressure bin 1, and the belt conveyor in the embodiment adopts a magnetic belt conveyor 2 for preliminarily removing iron-containing impurities in the electrolytic aluminum carbon slag. The ball mill 3 is arranged at the rear end of the magnetic belt conveyor 2 and matched with the magnetic belt conveyor, the discharge port of the ball mill 3 is connected with the feed port of the fluorine leaching reaction tank 4, the discharge port of the fluorine leaching reaction tank 4 is connected with the feed port of the first flotation machine 5, and the first flotation machine 5 is added with a fluorine precipitation agent (the fluorine precipitation agent is Al (OH))3) The lower tailing outlet at the bottom of the first flotation machine 5 is connected with the feed inlet of the magnetic separator 6, the discharge outlet of the magnetic separator 6 is connected with the feed inlet of the first cache tank 7 through a pipeline, and the discharge outlet of the first cache tank 7 is connected with the first dehydrator 8; the discharge hole of the first dehydrator 8 and the feed inlet of the first reaction tank 9 for primary sodium removalThe discharge port of the first reaction tank 9 is connected with the feed port of the second dehydrator 10, the discharge port of the second dehydrator 10 is connected with the feed port of the washing tank 11, the discharge port of the washing tank 11 is connected with the feed port of the third dehydrator 12, and the discharge port of the third dehydrator 12 is connected with the feed port of the dryer 13. The upper concentrate outlet of the first flotation machine 5 is connected with the feed inlet of a second reaction tank 19 for removing fluorine ions in carbon powder, the discharge outlet of the second reaction tank 19 is connected with the feed inlet of a second flotation machine 20, the discharge outlet of the second flotation machine 20 is connected with the feed inlet of a second buffer tank 21, and the discharge outlet of the second buffer tank 21 is connected with the feed inlet of a fourth dewatering machine 22. The first buffer tank 7 and the second buffer tank 21 are chemical anti-corrosion buffer tanks made of polyethylene.
The water outlets of the first dehydrator 8 and the fourth dehydrator 22 are connected to the first circulating water tank 15. The water outlets of the second dehydrator 10 and the third dehydrator 12 are both connected with the feed inlet of a sodium removing device 17, and the water outlet of the sodium removing device 17 is connected with a second circulating water tank 16.
The working principle is as follows: the electrolytic aluminum carbon slag (the electrolytic aluminum carbon slag contains fluorine-containing compound components such as sodium fluoride, magnesium fluoride and cryolite) is transported to the tail end by the magnetic belt conveyor 2 and then falls into the feed inlet of the ball mill 3, and the ball mill 3 grinds the electrolytic aluminum carbon slag into powdery electrolytic aluminum carbon powder. After entering the fluorine leaching reaction tank 4, the electrolytic aluminum carbon powder reacts with a fluorine leaching agent (HNO is selected as the fluorine leaching agent) in the fluorine leaching reaction tank 43、H2SO4One or more of acid hydrogen solutions), the temperature of fluorine leaching is 40-80 ℃, the time of fluorine leaching is 3-8 h, fluorine leaching slurry is obtained, and the fluorine leaching slurry enters a first flotation machine 5 and then passes through a fluorine precipitation agent (Al (OH)3) And then the aluminum fluoride and sodium salt sedimentation slurry at the lower layer and the carbon powder and volatile component floating slurry at the upper layer are obtained by separation after the action of the flotation agent.
The aluminum fluoride and sodium salt sedimentation slurry on the lower layer enters a magnetic separator 6 to further remove iron powder impurities, is temporarily stored in a first buffer tank 7, enters a first dehydrator 8 to be dehydrated, and the obtained aluminum fluoride and sodium salt sedimentation mixture enters a first reaction tank 9 and is reacted with acidic hydrogen in the first reaction tank 9Solution (HNO)3Or H2SO4Etc.) reaction, and waiting until the mixture of the sodium salt solution and the aluminum fluoride enters a second dehydrator 10 for dehydration, and separating to obtain (1) aluminum fluoride and a part of undissolved sodium salt crystal mixture and (2) sodium salt solution.
(1) And (3) the mixture of the aluminum fluoride and part of undissolved sodium salt crystals enters a washing tank 11 for washing, the sodium salt crystals are dissolved in water, the mixture after washing is sent to a third dehydrator 12 for dehydration treatment to obtain two components of separated aluminum fluoride and sodium salt solution, and the separated aluminum fluoride is sent to a dryer 13 for drying to obtain a powdery finished product aluminum fluoride 14.
(2) Sodium salt discharged from the water outlets of the second dehydrator 10 and the third dehydrator 12 enters a sodium salt-water separation device 17 (adopting a heating, distilling and separating means) to perform sodium salt-water separation treatment, so that pure sodium salt 18 and clear water are obtained, and the clear water enters a second circulating water tank 16 for recycling.
The upper layer of the floating slurry of the carbon powder and the volatile component enters a second reaction tank 19, the second reaction tank 19 is defluorinated and then enters a second flotation machine 20, the carbon powder slurry is refined in the second flotation machine 20, and the carbon powder slurry enters a fourth dehydrator 22 for dehydration to obtain a relatively dry finished product carbon powder 23 with high purity.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The equipment for regenerating aluminum fluoride is characterized in that: the device comprises a negative pressure bin for transferring electrolytic aluminum carbon slag, wherein a matched belt conveyor is arranged at the rear part of the negative pressure bin, a matched ball mill is arranged at the rear end of the discharging of the belt conveyor, a discharging port of the ball mill is connected with a feeding port of a fluorine leaching reaction tank, a discharging port of the fluorine leaching reaction tank is connected with a feeding port of a first flotation machine, a fluorine precipitating agent and a flotation agent are added into the first flotation machine, a lower tailing outlet at the bottom of the first flotation machine is connected with a feeding port of a magnetic separator, and a discharging port of the magnetic separator is connected with a first dewatering machine through a pipeline; the discharge port of the first dehydrator is connected with the feed inlet of the first reaction tank for primary sodium removal, the discharge port of the first reaction tank is connected with the feed inlet of the second dehydrator, the discharge port of the second dehydrator is connected with the feed inlet of the water washing tank, the discharge port of the water washing tank is connected with the feed inlet of the third dehydrator, and the discharge port of the third dehydrator is connected with the feed inlet of the dryer.
2. The apparatus for regenerating aluminum fluoride as claimed in claim 1, wherein: the upper concentrate outlet of the first flotation machine is connected with the feed inlet of a second reaction tank for removing fluorine ions in carbon powder, the discharge outlet of the second reaction tank is connected with the feed inlet of a second flotation machine, and the discharge outlet of the second flotation machine is connected with the feed inlet of a fourth dewatering machine.
3. The apparatus for regenerating aluminum fluoride as claimed in claim 2, wherein: the water outlets of the first dehydrator and the fourth dehydrator are connected with the first circulating water tank.
4. The apparatus for regenerating aluminum fluoride as claimed in claim 3, wherein: the water outlets of the second dehydrator and the third dehydrator are connected with the feed inlet of the sodium removing device, and the water outlet of the sodium removing device is connected with the second circulating water tank.
5. The apparatus for regenerating aluminum fluoride as claimed in claim 4, wherein: a first buffer tank is arranged between the magnetic separator and the first dehydrator.
6. The apparatus for regenerating aluminum fluoride as claimed in claim 5, wherein: and a second buffer tank is arranged between the second flotation machine and the fourth dehydrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922010622.3U CN211169878U (en) | 2019-11-20 | 2019-11-20 | Equipment for regenerating aluminum fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922010622.3U CN211169878U (en) | 2019-11-20 | 2019-11-20 | Equipment for regenerating aluminum fluoride |
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| CN211169878U true CN211169878U (en) | 2020-08-04 |
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| CN201922010622.3U Active CN211169878U (en) | 2019-11-20 | 2019-11-20 | Equipment for regenerating aluminum fluoride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110668483A (en) * | 2019-11-21 | 2020-01-10 | 刘向前 | Method for preparing aluminum fluoride by electrolyzing aluminum carbon slag |
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2019
- 2019-11-20 CN CN201922010622.3U patent/CN211169878U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110668483A (en) * | 2019-11-21 | 2020-01-10 | 刘向前 | Method for preparing aluminum fluoride by electrolyzing aluminum carbon slag |
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