CN117363909B - Method for preparing aluminum alloy by recycling aluminum from aluminum ash - Google Patents
Method for preparing aluminum alloy by recycling aluminum from aluminum ash Download PDFInfo
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- CN117363909B CN117363909B CN202311322802.XA CN202311322802A CN117363909B CN 117363909 B CN117363909 B CN 117363909B CN 202311322802 A CN202311322802 A CN 202311322802A CN 117363909 B CN117363909 B CN 117363909B
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 248
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 248
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 75
- 238000003723 Smelting Methods 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 99
- 229910052742 iron Inorganic materials 0.000 abstract description 52
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 7
- 239000011572 manganese Substances 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0084—Obtaining aluminium melting and handling molten aluminium
- C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
- C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for preparing aluminum alloy by recycling aluminum from aluminum ash, which belongs to the technical field of aluminum ash treatment and comprises the following steps: 1) Smelting the regenerated aluminum to obtain regenerated aluminum liquid, standing and settling the regenerated aluminum liquid, and separating to obtain upper-layer aluminum liquid and lower-layer aluminum liquid; 2) And (3) mixing and smelting the lower aluminum liquid and primary aluminum ash, separating the aluminum ash to obtain mixed aluminum liquid, and secondarily smelting the mixed aluminum liquid and the upper aluminum liquid together. The invention utilizes the aluminum ash to recycle the aluminum and the reclaimed aluminum to produce the aluminum alloy, can realize the reasonable utilization of the aluminum ash to recycle the aluminum, solves the technical problem of high iron content in the reclaimed aluminum, and improves the utilization rate of the reclaimed aluminum.
Description
Technical Field
The invention belongs to the technical field of aluminum ash recovery, and particularly relates to a method for preparing aluminum alloy by recovering aluminum from aluminum ash.
Background
The production raw materials of the aluminum alloy comprise electrolytic aluminum and secondary aluminum, wherein the electrolytic aluminum is primary aluminum, the purity is high, the iron content is low, and the quality of the aluminum alloy produced by taking the primary aluminum as the raw material is good. The regenerated aluminum obtained by recycling the waste aluminum products has more impurities, particularly high iron content, and the produced aluminum alloy has poor quality. In the prior art, the iron content of the regenerated aluminum is generally diluted by blending with the original aluminum, so that the iron content of the aluminum alloy is met. The method has the advantages of high use proportion of raw aluminum and higher cost.
In the disclosed technology, the iron phase naturally settles under the action of gravity by controlling lower heat preservation temperature and utilizing the characteristic that the density of the iron-rich compound phase is higher than that of the aluminum melt. But the iron-rich phase still exists in the lower aluminum melt, iron impurities cannot be removed in a precipitation form, and the lower aluminum melt with high iron content has low utilization value.
In the process of aluminum ash recycling, the total amount of metal aluminum extracted as a byproduct is less, and the aluminum alloy product cannot be produced in a large scale, and the aluminum ash recycled aluminum oxide is more in inclusion and mixed with the raw aluminum, so that the quality of the raw aluminum is reduced, and the problem of reasonable utilization exists.
Disclosure of Invention
The invention provides a method for preparing aluminum alloy by recycling aluminum from aluminum ash, which has the basic technical idea that the aluminum ash is utilized to recycle aluminum and recycled aluminum to mix and produce aluminum alloy so as to meet the iron content requirement of the aluminum alloy, and the concrete scheme is as follows:
a method for preparing aluminum alloy by recycling aluminum ash from aluminum comprises the following steps:
1) Smelting the regenerated aluminum to obtain regenerated aluminum liquid, standing and settling the regenerated aluminum liquid, and separating to obtain upper-layer aluminum liquid and lower-layer aluminum liquid;
2) And (3) mixing and smelting the lower aluminum liquid and primary aluminum ash, separating the aluminum ash to obtain mixed aluminum liquid, smelting the mixed aluminum liquid and the upper aluminum liquid together for the second time, refining and purifying, and casting to obtain the aluminum alloy. And adding ingredients according to the component requirements of aluminum alloy production during secondary smelting. The refining and purifying can be sequentially carried out by adopting conventional nitrogen rotary blowing refining and ceramic filter plate filtering.
The aluminum ash recovered aluminum has the characteristic of low iron content, and can dilute the iron content of the regenerated aluminum by mixing with the regenerated aluminum for smelting, so that the technical problem that the iron content exceeds the standard when the regenerated aluminum is used for producing aluminum alloy is solved, and the reasonable utilization of the aluminum ash recovered aluminum is realized.
In the application, instead of directly extracting aluminum from aluminum ash and then mixing and smelting the aluminum ash with the reclaimed aluminum, the reclaimed aluminum is firstly smelted, the lower-layer high-iron aluminum liquid and the upper-layer low-iron aluminum liquid are separated through sedimentation and standing, and then the lower-layer high-iron aluminum liquid and the primary aluminum ash are mixed and smelted to separate mixed aluminum liquid.
After the primary aluminum ash is used for extracting aluminum, about 10% of metal aluminum still remains, and the metal aluminum cannot be extracted from the secondary aluminum ash. By adopting the method, the high-iron aluminum liquid and the primary aluminum ash are mixed and smelted, although the metal aluminum in the aluminum ash can not be completely recovered, the iron content of the whole system tends to be consistent during the mixed smelting, so that the primary aluminum ash can be fully utilized to dilute the iron content of the high-iron aluminum liquid, after the mixed smelting, a part of iron elements enter the secondary aluminum ash along with the residual aluminum to be separated, and the secondary aluminum ash is used for preparing the water purifying agent calcium aluminate powder, so that the quality of the calcium aluminate powder is not influenced.
According to the method provided by the invention, the use proportion of the secondary aluminum can be improved when the requirement of the aluminum alloy for producing the iron content is met.
In the step 2), the aluminum ash after mixed smelting is subjected to ball milling and screening to extract aluminum, and the extracted aluminum is smelted together with the mixed aluminum liquid and the upper aluminum liquid for the second time. The recovery rate of metal aluminum in primary aluminum ash can be improved by further ball milling and screening aluminum extraction.
Further, the mass ratio of the upper layer aluminum liquid to the lower layer aluminum liquid after standing, settling and separating of the reclaimed aluminum is 2:1; the mass ratio of the lower aluminum liquid to the primary aluminum ash is 1:2. The iron content of the recycled aluminum is generally about 1.0-2.0%, the iron content of the aluminum ash recovered aluminum is generally below 0.05%, and the iron content of the aluminum alloy can be controlled below 0.5% by implementing the ratio.
In the step 1), the mass ratio of ferromanganese is adjusted to 1.2:1 during smelting of the secondary aluminum. According to the prior art, the sedimentation efficiency of the iron-rich phase can be improved by adding the manganese agent to adjust the ferromanganese ratio to 1.2, but the manganese content in the aluminum liquid can be increased by adding the manganese agent, and the manganese agent is not suitable for being added when the product has the requirement on the manganese content.
Further, in the step 1), smelting of the regenerated aluminum is carried out in a rotary furnace, and standing and settling of the regenerated aluminum liquid are carried out in a heat preservation furnace; in the step 2), the mixed smelting of the lower aluminum liquid and the primary aluminum ash is carried out in a rotary furnace.
Further, a circle of masonry is arranged at the lower part of the furnace chamber of the heat preservation furnace, the height of the masonry is 3/4 of the height of the furnace chamber, and the inner diameter of the masonry is 1/2 of the inner diameter of the furnace chamber.
As the key means of the invention is sedimentation layering of the regenerated aluminum liquid, when the height of the holding furnace is large, the iron-rich phase in the aluminum liquid is beneficial to forming the concentration gradient of iron content along the height direction after sedimentation. When the heat preservation furnace is designed, the volume of the furnace chamber cannot be greatly adjusted, and when the height is increased, the inner diameter of the furnace chamber needs to be reduced. The invention considers that the vacuum ladle is adopted to directly extract the lower layer aluminum liquid in the heat preservation furnace, and the aluminum extraction operation is not facilitated after the inner diameter of the furnace chamber is reduced. Through setting up the brickwork, form big-end-up's furnace chamber shape, both be favorable to the iron-rich phase subsidence layering, also be favorable to realizing the extraction of lower floor's aluminium liquid.
Further, the top of the masonry is a conical surface. The conical surface is favorable for the iron-rich phase to settle to the lower part of the masonry.
Further, the masonry is provided with a launder penetrating through the top and the inner hole wall, and the lower end of the launder is close to the bottom of the furnace chamber; the launders are a plurality of, along the equidistant distribution of brickwork circumference. The launder can be used as an aluminum pumping channel of the vacuum ladle, and the diameter of the launder is larger than the pipe diameter of the aluminum suction pipe of the vacuum ladle.
Further, the top of the furnace chamber is provided with a positioning groove along the circumferential direction corresponding to the launder. Through setting up the constant head tank, be favorable to the suction aluminum pipe of ladle to accurately stretch into in the chute.
Further, in the step 1), after the regenerated aluminum liquid is settled in a heat preservation furnace, extracting lower-layer aluminum liquid from the heat preservation furnace by a vacuum ladle, and transferring the lower-layer aluminum liquid into a rotary furnace for mixed smelting by the vacuum ladle; when the vacuum ladle is used for extracting lower-layer aluminum liquid, the aluminum suction pipe extends into the launder and then vacuum aluminum extraction is carried out.
The invention has the advantages that the aluminum ash is utilized to recycle aluminum and the regenerated aluminum to produce aluminum alloy, so that the reasonable utilization of the aluminum ash to recycle aluminum can be realized, the technical problem of high iron content in the regenerated aluminum is solved, and the utilization rate of the regenerated aluminum is improved.
Drawings
FIG. 1 is a schematic view of a holding furnace in example 3.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. All other embodiments, modifications, equivalents, improvements, etc., which are apparent to those skilled in the art without the benefit of this disclosure, are intended to be included within the scope of this invention.
Examples
Example 1
1. Weighing 10kg of crushed regenerated waste aluminum material, adding 4% solvent, heating to 720 ℃ in a graphite crucible for melting, removing ash slag, and sampling aluminum liquid to detect that the iron content is 1.51%;
2. cooling the aluminum liquid to 585 ℃, keeping the temperature and standing for 4 hours, completely cooling and solidifying, dividing the solidified aluminum block into an upper aluminum block and a lower aluminum block along the height direction, weighing the upper aluminum block by about 6.4kg, and sampling and detecting that the iron content is 0.75%; weighing about 3.1kg of lower aluminum block, and sampling to detect the iron content to be 2.30%;
3. 40kg of primary smelting aluminum ash containing 60% of elemental aluminum is weighed, melted together with the lower layer aluminum block in a graphite crucible, fully stirred in the melting process, separated out aluminum liquid, weighed about 22.5kg, detected that the iron content is 0.40%, and mixed and smelted with the upper layer aluminum block separated in the step 2, and detected that the iron content is 0.45%.
Example 2
1. 10kg of the same regenerated aluminum scrap as in example 1 was weighed, 4% solvent was added, the mixture was melted in a graphite crucible at a temperature of 720 ℃, ash was removed, and the aluminum liquid was sampled and examined for iron content of 1.43% and manganese content of 0.51%; 160g of Mn75 manganese agent was added and stirred.
2. Cooling the aluminum liquid to 600 ℃, preserving heat, standing for 4 hours, completely cooling and solidifying, dividing the solidified aluminum block into an upper aluminum block and a lower aluminum block along the height direction, weighing the upper aluminum block by about 6.2kg, and sampling and detecting that the iron content is 0.52%; weighing about 3.1kg of lower aluminum block, and sampling to detect the iron content to be 3.34%;
3. 40kg of primary smelting aluminum ash as in example 1 is weighed, melted together with the lower aluminum block in a graphite crucible, fully stirred in the melting process, separated out of aluminum liquid, weighed about 23.2kg, detected that the iron content is 0.35%, and mixed and melted with the upper aluminum block separated in step 2, and detected that the iron content is 0.40%.
Comparative example 1
1. 10kg of regenerated waste aluminum material which is the same as that in the example 1 is weighed, 4% solvent is added, the temperature is raised to 700 ℃ in a graphite crucible for melting, ash slag is removed, and the aluminum liquid is sampled and detected to have iron content of 1.48%;
2. 40kg of primary smelting aluminum ash which is the same as that in the example 1 is weighed, molten in a graphite crucible, separated into aluminum liquid, and the iron content is detected to be 0.08%;
3. the aluminum solutions of steps 1 and 2 were mixed, and after cooling, 28.2kg was weighed, and the iron content was measured to be 0.62%.
Comparative example 2
1. 25kg of primary smelted aluminum ash as in example 1 was weighed, melted in a graphite crucible, separated into an aluminum liquid, and mixed with the aluminum block containing 0.62% of iron obtained in step 3 of comparative example 1 for smelting, and the iron content was detected to be 0.44%.
In examples 1 and 2, the use ratio of the secondary aluminum to the primary aluminum ash is 1:4, so that the iron content of the aluminum liquid after mixed smelting can be reduced to below 0.5%. In comparative example 1, the iron content was higher than 0.5% when the ratio of the secondary aluminum to the primary aluminum ash was 1:4. Comparative example 2 finally reduces the iron content of the aluminum liquid to below 0.5%, but the use ratio of the secondary aluminum to the primary aluminum ash is 1:6.5, and the utilization rate of the secondary aluminum is low.
Example 3
The embodiment is to realize the method of the invention, and discloses a heat preservation furnace for standing, settling and separating regenerated aluminum, as shown in figure 1, the structure of the heat preservation furnace comprises an outer stainless steel shell, a furnace chamber 1 internally built by an inner lining, a light heat preservation layer arranged between the inner lining and the stainless steel shell, and a furnace top arranged above the furnace chamber; the lower part of the furnace chamber is provided with a circle of masonry 2 which is built by high-alumina refractory materials. The height of the masonry is 3/4 of the height of the furnace chamber, and the inner diameter of the masonry is 1/2 of the inner diameter of the furnace chamber, so that a cavity with a large upper part and a small lower part is formed. The top of the masonry is a conical surface. The conical surface is favorable for the iron-rich phase to settle to the lower part of the masonry.
The masonry is provided with an inclined launder 3 penetrating through the top and the inner hole wall, and the lower end of the launder is close to the bottom of the furnace chamber; the launders are a plurality of, along the equidistant distribution of brickwork circumference. The launder near the furnace door can be used as an aluminum pumping channel of the vacuum ladle, and the diameter of the launder is larger than the pipe diameter of the aluminum suction pipe of the vacuum ladle. The rest of the launder can be used as a circulation channel of the aluminum melt, the flow channel of the aluminum melt is divided into a plurality of channels in the cross section of the furnace chamber, and when the bottom aluminum liquid is extracted, turbulent flow can be prevented from being formed, so that the iron-rich phase deposited at the bottom can enter the upper aluminum liquid again.
And the top of the furnace chamber is provided with a positioning groove 4 along the circumferential direction corresponding to the launder. The positioning groove is arranged at the position close to the furnace door, the positioning groove is obliquely arranged, the inclination angle is consistent with the angle of the launder close to the furnace door, and the aluminum suction pipe can be guided. Through setting up the constant head tank, be favorable to the suction aluminum pipe of ladle to accurately stretch into in the chute.
In addition, when the aluminum suction pipe stretches into the launder to suck aluminum, the launder is used as an aluminum suction channel, so that aluminum liquid can be easily extracted from the bottom. In order to facilitate the aluminum suction pipe to extend into the launder, and the rest of the launder also serves as a flow channel during the sedimentation of the aluminum liquid, the launder diameter should be significantly larger than the aluminum suction pipe diameter. The annular plug can be arranged at the corresponding position of the outer wall of the upper part of the aluminum suction pipe, and can plug the gap between the aluminum suction pipe and the launder after the aluminum suction pipe stretches into the launder, so that the upper layer aluminum liquid is prevented from being pumped away along the gap during aluminum pumping.
Pouring the regenerated aluminum into a rotary furnace after smelting the regenerated aluminum in the rotary furnace, transferring the regenerated aluminum liquid into a heat preservation furnace for standing and settling, extracting lower-layer aluminum liquid from the heat preservation furnace by a vacuum ladle, transferring the lower-layer aluminum liquid into the rotary furnace for mixed smelting by the vacuum ladle, pouring the rotary furnace after smelting to pour out mixed aluminum liquid, separating aluminum ash precipitated at the bottom of the rotary furnace, and carrying out further ball milling and screening to extract aluminum.
Claims (6)
1. The method for preparing the aluminum alloy by recycling aluminum from the aluminum ash is characterized by comprising the following steps of:
1) Smelting the regenerated aluminum to obtain regenerated aluminum liquid, standing and settling the regenerated aluminum liquid, and separating to obtain upper-layer aluminum liquid and lower-layer aluminum liquid;
2) Mixing and smelting lower-layer aluminum liquid and primary aluminum ash, separating the aluminum ash to obtain mixed aluminum liquid, and smelting the mixed aluminum liquid and the upper-layer aluminum liquid together for the second time;
in the step 1), smelting the regenerated aluminum in a rotary furnace, and standing and settling the regenerated aluminum liquid in a heat preservation furnace; in the step 2), the lower layer molten aluminum and primary aluminum ash are mixed and smelted in a rotary furnace;
a circle of masonry is arranged at the lower part of the furnace chamber of the heat preservation furnace, the height of the masonry is 3/4 of the height of the furnace chamber, and the inner diameter of the masonry is 1/2 of the inner diameter of the furnace chamber;
the top of the masonry is a conical surface;
the masonry is provided with a launder penetrating through the top and the inner hole wall, and the lower end of the launder is close to the bottom of the furnace chamber; the launders are a plurality of, along the equidistant distribution of brickwork circumference.
2. The method for preparing aluminum alloy by recycling aluminum ash according to claim 1, wherein: in the step 2), the aluminum ash after mixed smelting is subjected to ball milling and screening to extract aluminum, and the extracted aluminum, the mixed aluminum liquid and the upper aluminum liquid are smelted together for the second time.
3. The method for preparing aluminum alloy by recycling aluminum ash according to claim 1, wherein: standing, settling and separating the regenerated aluminum, wherein the mass ratio of the upper layer aluminum liquid to the lower layer aluminum liquid is 2:1; the mass ratio of the lower aluminum liquid to the primary aluminum ash is 1:2.
4. The method for preparing aluminum alloy by recycling aluminum ash according to claim 1, wherein: in the step 1), the mass ratio of ferromanganese is adjusted to 1.2:1 during smelting of the reclaimed aluminum.
5. The method for preparing aluminum alloy by recycling aluminum ash according to claim 1, wherein: and the top of the furnace chamber is provided with a positioning groove along the circumferential direction corresponding to the launder.
6. The method for preparing aluminum alloy by recycling aluminum ash according to claim 5, wherein: in the step 1), after standing and settling in a heat preservation furnace, extracting lower-layer aluminum liquid from the heat preservation furnace by a vacuum ladle, and transferring the lower-layer aluminum liquid into a rotary furnace for mixed smelting by the vacuum ladle; when the vacuum ladle is used for extracting lower-layer aluminum liquid, the aluminum suction pipe extends into the launder and then vacuum aluminum extraction is carried out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311322802.XA CN117363909B (en) | 2023-10-12 | 2023-10-12 | Method for preparing aluminum alloy by recycling aluminum from aluminum ash |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311322802.XA CN117363909B (en) | 2023-10-12 | 2023-10-12 | Method for preparing aluminum alloy by recycling aluminum from aluminum ash |
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| CN103160693A (en) * | 2013-03-12 | 2013-06-19 | 焦作万方铝业股份有限公司 | Method for aluminum ash treatment and recycling use |
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| WO2021218273A1 (en) * | 2020-04-30 | 2021-11-04 | 华劲新材料研究院(广州)有限公司 | Highly thermally conductive die-casting aluminum alloy material made of recycled aluminum, and preparation method therefor |
| CN114317965A (en) * | 2022-01-05 | 2022-04-12 | 重庆赛迪热工环保工程技术有限公司 | Process and device for smelting and reducing zinc-containing material by thermite method |
| CN116287821A (en) * | 2023-04-14 | 2023-06-23 | 天津圣金特汽车配件有限公司 | Regeneration preparation method of aluminum alloy for automobile parts |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20090046868A (en) * | 2006-08-01 | 2009-05-11 | 쇼와 덴코 가부시키가이샤 | Process for production of aluminum alloy formings, aluminum alloy formings and production system |
| JP6864704B2 (en) * | 2019-01-16 | 2021-04-28 | 株式会社豊田中央研究所 | How to regenerate Al alloy |
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