CN112961992A - Aluminum ash frying agent and application thereof - Google Patents
Aluminum ash frying agent and application thereof Download PDFInfo
- Publication number
- CN112961992A CN112961992A CN202110135644.1A CN202110135644A CN112961992A CN 112961992 A CN112961992 A CN 112961992A CN 202110135644 A CN202110135644 A CN 202110135644A CN 112961992 A CN112961992 A CN 112961992A
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- CN
- China
- Prior art keywords
- aluminum
- ash
- aluminum ash
- frying
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- C22B21/0038—Obtaining aluminium by other processes
- C22B21/0069—Obtaining aluminium by other processes from scrap, skimmings or any secondary source aluminium, e.g. recovery of alloy constituents
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- 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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to an aluminum ash stir-frying agent and application thereof, belonging to the technical field of metal recovery. The aluminum ash stir-frying agent comprises, by mass, 5-15% of charcoal powder, 1-6% of sulfur, 3-10% of iron-aluminum powder, 20-35% of sodium nitrate, 8-20% of sodium fluosilicate and 15-35% of sodium sulfate. In the application of recovering aluminum in the aluminum ash, the addition amount of the aluminum ash frying agent is 0.1-2% of the mass of the aluminum ash, and the temperature of the aluminum ash is not higher than 600 ℃. The aluminum ash stir-frying agent is economical and practical, good in reaction effect and simple to use.
Description
Technical Field
The invention relates to an aluminum ash stir-frying agent and application thereof, belonging to the technical field of metal recovery.
Background
The aluminum ash is scum, has an important effect on the stir-frying process, mainly adsorbs impurities such as aluminum oxide, fluoride salt and the like from the electrolytic aluminum liquid, and simultaneously has the functions of protecting the aluminum melt, preventing aluminum from being oxidized and the like. Therefore, the aluminum ash is periodically removed from the furnace during stir-frying, and becomes industrial waste. Aluminum ash (secondary aluminum ash) is also generated in the smelting process of utilizing aluminum-containing aluminum ash, ladle cleaning materials of an aluminum water tank, aluminum scraps produced in the aluminum processing industry, recycled waste aluminum-containing materials for aluminum smelting and recycled metal aluminum. However, the comprehensive resource utilization rate of the aluminum ash is still at a low level, and a large amount of aluminum ash is directly buried or accumulated near a production plant area, so that a series of environmental problems such as soil, air and the like are caused, and great pressure is formed on the environment.
The aluminum ash is a renewable resource, contains aluminum and a plurality of valuable elements, and mainly consists of a mixture of a metal aluminum simple substance, an oxide and a salt solvent. Wherein, the metal aluminum exists under the cladding of aluminum oxide and aluminum nitride, in particular containing aluminum, aluminum oxide, iron-silicon-magnesium oxide, potassium-sodium-calcium-magnesium chloride and trace fluoride.
The ash frying method is a process formed by utilizing the principle that aluminum in aluminum ash is oxidized and released heat in air, aluminum particles are poor in wettability with the aluminum ash, and a contact angle is high. The method is simple to operate, the labor cost is mainly input, the equipment cost is extremely low, however, the existing ash frying method cannot rapidly raise the aluminum ash to the separation temperature, and the separation of aluminum and ash cannot be realized.
Disclosure of Invention
The invention provides an aluminum ash stir-frying agent and application thereof, aiming at solving the problem that the reaction temperature is difficult to quickly increase and the separation of aluminum and ash cannot be realized in the existing thermal separation aluminum ash technology.
An aluminum ash frying agent: the material comprises, by mass, 5-15% of charcoal powder, 1-6% of sulfur, 3-10% of iron-aluminum powder, 20-35% of sodium nitrate, 8-20% of sodium fluosilicate and 15-35% of sodium sulfate;
the charcoal powder, the iron-aluminum powder, the sodium nitrate, the sodium fluosilicate and the sodium sulfate are all dried at the temperature of 150 ℃ and 180 ℃;
the application of the aluminum ash stir-frying agent in recovering aluminum in aluminum ash is as follows: the addition amount of the aluminum ash frying agent is 0.1-2% of the mass of the aluminum ash; the temperature of the aluminum ash is not higher than 600 ℃.
The specific method comprises the following steps: adding hot aluminum ash into the ash frying kettle, fully heating the ash frying kettle by utilizing the waste heat of the hot aluminum ash, adding cold ash, adding aluminum ash to fry an ash agent, uniformly mixing, heating, stir-frying to obtain liquid aluminum and ash, recovering the liquid aluminum, and realizing the separation of the aluminum and the ash.
The invention has the beneficial effects that:
(1) in the prior art, the aluminum ash cannot be quickly raised to the separation temperature, so that the aluminum and the ash cannot be separated;
(2) the aluminum ash frying agent is a graded heating process, sulfur is heated and spontaneously combusted to release heat when the temperature is 250 ℃ and the temperature is raised to about 380 ℃, sodium nitrate is decomposed to release heat and the temperature is continuously raised to 450 ℃, charcoal powder is combusted to continuously release heat and raise the temperature under the action of the temperature and the decomposition products of the sodium nitrate, a large amount of heat is released when the temperature reaches the aluminothermic reaction temperature, the temperature of the whole environment is raised, stable components are adopted, the temperature raising process is easy to control, and the reaction process is safe and reliable;
(3) the aluminum ash frying agent has low cost and high working efficiency, is suitable for small-scale batch processing of aluminum ash, and has high economic benefit and environmental benefit.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.
Example 1: the aluminum ash stir-frying agent of the embodiment: the material comprises 8% of charcoal powder, 5% of sulfur, 6% of iron-aluminum powder, 35% of sodium nitrate, 13% of sodium fluosilicate and 33% of sodium sulfate by mass percent; drying charcoal powder, aluminum-iron powder, sodium nitrate, sodium fluosilicate and sodium sulfate at 150 ℃;
the application of the aluminum ash frying agent in recovering aluminum in the aluminum ash: placing 400kg of hot aluminum ash which is just taken off into an ash frying kettle, adding 400kg of hot aluminum ash after the ash frying kettle is fully heated by the residual temperature of the hot aluminum ash, uniformly mixing, measuring the temperature of the aluminum ash to be 300 ℃, and adding an aluminum ash frying agent, wherein the adding amount of the aluminum ash frying agent is 0.2 percent of the mass of the aluminum ash; heating and stir-frying to obtain liquid aluminum and ash, and recovering the liquid aluminum to realize the separation of the aluminum and the ash.
Example 2: the aluminum ash stir-frying agent of the embodiment: the material comprises 12 percent of charcoal powder, 3 percent of sulfur, 5 percent of aluminum-iron powder, 25 percent of sodium nitrate, 20 percent of sodium fluosilicate and 35 percent of sodium sulfate by mass percent; drying charcoal powder, iron-aluminum powder, sodium nitrate, sodium fluosilicate and sodium sulfate at 160 ℃;
the application of the aluminum ash frying agent in recovering aluminum in the aluminum ash: placing 800kg of cold aluminum ash into an ash frying kettle, and adding an aluminum ash frying agent, wherein the addition amount of the aluminum ash frying agent is 2.0 percent of the mass of the aluminum ash; heating and stir-frying to obtain liquid aluminum and ash, and recovering the liquid aluminum to realize the separation of the aluminum and the ash.
Example 3: the aluminum ash stir-frying agent of the embodiment: the material comprises 15 percent of charcoal powder, 4 percent of sulfur, 10 percent of aluminum-iron powder, 30 percent of sodium nitrate, 16 percent of sodium fluosilicate and 25 percent of sodium sulfate by mass percent; drying charcoal powder, aluminum-iron powder, sodium nitrate, sodium fluosilicate and sodium sulfate at 180 ℃;
the application of the aluminum ash frying agent in recovering aluminum in the aluminum ash: placing 400kg of hot aluminum ash which is just taken off into an ash frying kettle, adding 400kg of cold aluminum ash after the ash frying kettle is fully heated by the residual temperature of the hot aluminum ash, uniformly mixing, measuring the temperature of the aluminum ash to be 290 ℃, and adding an aluminum ash frying agent, wherein the adding amount of the aluminum ash frying agent is 1.0 percent of the mass of the aluminum ash; heating and stir-frying to obtain liquid aluminum and ash, and recovering the liquid aluminum to realize the separation of the aluminum and the ash.
While the present invention has been described in detail with reference to the specific embodiments thereof, the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (4)
1. An aluminum ash frying agent is characterized in that: the material comprises, by mass, 5-15% of charcoal powder, 1-6% of sulfur, 3-10% of iron-aluminum powder, 20-35% of sodium nitrate, 8-20% of sodium fluosilicate and 15-35% of sodium sulfate.
2. The aluminum ash frying agent as set forth in claim 1, wherein: charcoal powder, iron-aluminum powder, sodium nitrate, sodium fluosilicate and sodium sulfate are all dried at the temperature of 150 ℃ and 180 ℃.
3. The use of the aluminum ash roasting agent of claim 1 for recovering aluminum from aluminum ash, wherein the aluminum ash roasting agent comprises: the addition amount of the aluminum ash frying agent is 0.1-2% of the mass of the aluminum ash.
4. The use of the aluminum ash frying agent according to claim 3 for recovering aluminum from aluminum ash, wherein: the temperature of the aluminum ash is not higher than 600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110135644.1A CN112961992B (en) | 2021-02-01 | 2021-02-01 | Aluminum ash frying agent and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110135644.1A CN112961992B (en) | 2021-02-01 | 2021-02-01 | Aluminum ash frying agent and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112961992A true CN112961992A (en) | 2021-06-15 |
| CN112961992B CN112961992B (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202110135644.1A Active CN112961992B (en) | 2021-02-01 | 2021-02-01 | Aluminum ash frying agent and application thereof |
Country Status (1)
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| CN (1) | CN112961992B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057611A (en) * | 1975-12-24 | 1977-11-08 | Southwire Company | Process for recovering aluminum from alunite |
| JPH0693348A (en) * | 1992-09-16 | 1994-04-05 | Yoshiro Yamauchi | Pretreatment of aluminum residual ash |
| JPH09143586A (en) * | 1995-11-28 | 1997-06-03 | Ryokichi Shinpo | Method for removing copper in molten iron |
| JPH09296230A (en) * | 1996-05-01 | 1997-11-18 | Almetax Kk | Treatment of aluminum remaining ash |
| WO2009013177A1 (en) * | 2007-07-20 | 2009-01-29 | Solvay Fluor Gmbh | Process for the recovery of aluminium from aluminium dross |
| CN104962748A (en) * | 2015-06-30 | 2015-10-07 | 苏州卡迪亚铝业有限公司 | Method for efficiently separating and recycling metallic aluminum from aluminum ash |
| CN105002365A (en) * | 2015-07-01 | 2015-10-28 | 苏州卡迪亚铝业有限公司 | Efficient aluminum ash separating agent |
| CN107245549A (en) * | 2017-06-15 | 2017-10-13 | 王强 | A kind of the efficient of electrolytic aluminium factory aluminium ash utilizes technique |
| JP2019099843A (en) * | 2017-11-29 | 2019-06-24 | 東洋電化工業株式会社 | Flux for ash drawing |
| CN110548753A (en) * | 2019-09-30 | 2019-12-10 | 河南远润循环发展科技有限公司 | Efficient and clean secondary aluminum ash harmless treatment method |
| CN111041229A (en) * | 2019-12-20 | 2020-04-21 | 四川居里高科技有限责任公司 | Self-heating slag frying agent and preparation method thereof |
-
2021
- 2021-02-01 CN CN202110135644.1A patent/CN112961992B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057611A (en) * | 1975-12-24 | 1977-11-08 | Southwire Company | Process for recovering aluminum from alunite |
| JPH0693348A (en) * | 1992-09-16 | 1994-04-05 | Yoshiro Yamauchi | Pretreatment of aluminum residual ash |
| JPH09143586A (en) * | 1995-11-28 | 1997-06-03 | Ryokichi Shinpo | Method for removing copper in molten iron |
| JPH09296230A (en) * | 1996-05-01 | 1997-11-18 | Almetax Kk | Treatment of aluminum remaining ash |
| WO2009013177A1 (en) * | 2007-07-20 | 2009-01-29 | Solvay Fluor Gmbh | Process for the recovery of aluminium from aluminium dross |
| CN104962748A (en) * | 2015-06-30 | 2015-10-07 | 苏州卡迪亚铝业有限公司 | Method for efficiently separating and recycling metallic aluminum from aluminum ash |
| CN105002365A (en) * | 2015-07-01 | 2015-10-28 | 苏州卡迪亚铝业有限公司 | Efficient aluminum ash separating agent |
| CN107245549A (en) * | 2017-06-15 | 2017-10-13 | 王强 | A kind of the efficient of electrolytic aluminium factory aluminium ash utilizes technique |
| JP2019099843A (en) * | 2017-11-29 | 2019-06-24 | 東洋電化工業株式会社 | Flux for ash drawing |
| CN110548753A (en) * | 2019-09-30 | 2019-12-10 | 河南远润循环发展科技有限公司 | Efficient and clean secondary aluminum ash harmless treatment method |
| CN111041229A (en) * | 2019-12-20 | 2020-04-21 | 四川居里高科技有限责任公司 | Self-heating slag frying agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 谭广志: "铝灰中铝回收工艺研究", 《河南科技》 * |
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| Publication number | Publication date |
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| CN112961992B (en) | 2023-03-24 |
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