CN101280366B - Cold smelt process for secondary aluminium - Google Patents
Cold smelt process for secondary aluminium Download PDFInfo
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- CN101280366B CN101280366B CN2008101068735A CN200810106873A CN101280366B CN 101280366 B CN101280366 B CN 101280366B CN 2008101068735 A CN2008101068735 A CN 2008101068735A CN 200810106873 A CN200810106873 A CN 200810106873A CN 101280366 B CN101280366 B CN 101280366B
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Abstract
The invention relates to a low temperature smelting process for the secondary aluminum, which belongs to the technical field of the molten metal treatment. Secondary aluminum furnace charge is cleaned and forms a molten pool, and the molten liquid temperature is controlled at 630 to 720 DEG C; the well-blended selected crystalline silicon is pressed into the molten pool in a plurality of batches, and the method of manual or mechanical stirring or electromagnetic stirring is adopted to ensure that the crystalline silicon is dissolved into the melt completely; then other various alloying elements are added, and are stirred fully to be dissolved until the components are qualified, and after the components are qualified, the refinement and modification processing is performed, and when the required pouring temperature is achieved, the slag is raked off to be poured into ingots. The adoption of the melting method can realize the dual effects of high yielding rate and energy conservation.
Description
Technical field:
The present invention relates to a kind of aluminium melting method, particularly a kind of cold melt process for secondary aluminium.
Background technology:
As everyone knows, when the melting secondary aluminum, aluminium liquid be can fully be dissolved into, often temperature of aluminum liquid 850 ℃ so that higher temperature risen in order to make the high-meltiing alloy element that adds secondary aluminum.So, alloying element is to have added, but brought two big problems: the one,, high temperature has quickened the oxidization burning loss of aluminium and various alloying elements, strengthened the loss of aluminium and alloying element, increased being mingled with of aluminium liquid, also the oxide film on aluminium liquid surface has lost defencive function under the Yin Gaowen, aluminium liquid is air-breathing serious, causes aluminium liquid metallurgical quality to worsen; The 2nd,, in order to improve temperature of aluminum liquid, energy consumption also certainly will increase considerably, and is that 01802668.0 " aluminium, the salt-free non-oxidizable remelting method of aluminium alloy and aluminium waste " its temperature in the aluminium fusion process will reach 1000 ℃ temperature as the patent No.; Under the condition of high temperature, easily form protective layer on the molten aluminium, and easily produce a large amount of waste residues; Simultaneously,, must strengthen the dynamics of refinement and denaturation again, increase the consumption of refining agent and alterant, prolong the treatment time, further improve the processing cost of energy consumption and aluminium liquid so again for guaranteeing the metallurgical quality of aluminium liquid.
Summary of the invention:
The present invention promptly provides a kind of cold melt process for secondary aluminium, its yield height, and environmental protection and energy saving, energy consumption is low, the aluminium melting method that smelting temperature is low.
The present invention includes the following step:
A, secondary aluminum furnace chargeization are clear, form al molten bath, take off removing dross;
B, control stove inner melt temperature are at 630～720 ℃;
C, the silicon metal for preparing is pressed into the molten bath, and stirs, make silicon metal fully be dissolved into melt;
D, add various required alloying elements again, and abundant stirring and dissolving, qualified until required composition;
Carry out refinement and denaturation after E, composition are qualified and handle, last skimming casting ingot-forming.
The present invention preferably controls stove inner melt temperature at 650～720 ℃.
The present invention adds described silicon metal raw material through the selected removal of impurity and dust, and crystallization control silico briquette degree diameter is at 10～50mm.
Silicon metal divides some batches to be pressed into aluminium liquid molten bath, and adopts the method for artificial or machinery or induction stirring to stir, and makes silicon metal fully be dissolved into melt; Add other required various alloying elements again, and abundant stirring and dissolving, qualified until composition, refinement and denaturation is handled, and reaches the requirement teeming temperature, the skimming casting ingot-forming.
The present invention adopts above-mentioned melting method, in aluminium or secondary aluminum, add the alloying element silicon metal during melting, greatly reduce the smelting temperature of aluminium and secondary aluminum, through studies show that to the various phasors of aluminium alloy, when alloying element and aluminium generation eutectic reaction, can form the lower eutectic of fusing point.Eutectiferously occur making secondary aluminum liquid can under low relatively temperature, keep liquid.As long as in the alloy this element that eutectic reaction can take place is arranged, element silicon for example, and certain solubleness is arranged, secondary aluminum liquid just can keep liquid in lower temperature (more than the eutectic temperature) so, various alloying elements just can dissolve in the aluminium liquid of this lesser temps, enter aluminium liquid.Adopt stirring method, then can accelerate the dissolving of alloying element.Be implemented in secondary aluminum preparation and melting under 630～720 ℃.
Embodiment:
Below in conjunction with embodiment the present invention is elaborated, the English alphabet of the digital front among the embodiment is the cast aluminium trade mark, after now embodiments of the invention being described in.
Embodiment 1
10 tons of ZL102 regeneration aluminium ingots are produced in preparation.
Must add through charge calculation: 4 tons of ZL102 waste castings, 5.28 tons of fine aluminiums, 0.72 ton of silicon metal.With ZL102 waste casting and fine aluminium material, heating is dissolved it, and makes temperature be controlled at 680 ℃ earlier; (selected, the lumpiness diameter is pressed into aluminium liquid by criticizing in three batches 30～50mm) with the silicon metal material; Every batch be pressed into after, adopt induction stirring, make the silicon metal dissolving, after be sure oing to have dissolved, add the 2nd batch of silicon metal.Operation sequence before repeating adds until whole silicon metals, and dissolving fully; After the composition chemical examination is qualified, carries out refinement and denaturation and handle; The check metallurgical quality is qualified through the stokehold, skimming casting ingot-forming (ZL102 regeneration aluminium ingot composition sees Table 1).
The ZL102 regeneration aluminium ingot composition of table 1 preparation
| Element | Si | Fe | Al |
| Content (%) | 11.75 | 0.64 | Surplus |
Embodiment 2
5 tons of preparation ADC12 regeneration aluminium ingots
Through preparing burden: 2.2 tons of ADC12 alloy waste castings, 2.4 tons of fine aluminiums, 0.335 ton of silicon metal, fine copper 65kg; Add waste casting and fine aluminium material earlier, heating makes its fusing, and makes temperature be controlled at 720 ℃; With selected impurity and the dust removed of silicon metal material, the lumpiness diameter is at 30～50mm, divides two batches by batch being pressed into aluminium liquid; Every batch be pressed into after, adopt hand mixing, make the silicon metal dissolving; After be sure oing to have dissolved, add the 2nd batch of silicon metal, operation sequence before repeating adds until whole silicon metals, and dissolving fully; After this, be pressed into the fine copper material, the surface must dewater, purify, and stirs it is fully dissolved; After the composition chemical examination is qualified, carries out refinement and denaturation and handle.The check metallurgical quality is qualified through the stokehold, the skimming casting ingot-forming.
The ADC12 regeneration aluminium ingot composition of preparation sees Table 2
| Element | Si | Cu | Fe | Mn | Mg | Al |
| Content (%) | 11.0 | 2.8 | 1.0 | 0.4 | 0.2 | Surplus |
Embodiment 3
5 tons of ZL102 regeneration aluminium ingots are produced in preparation.
Must add through charge calculation: 2 tons of ZL102 waste castings, 2.6 tons of fine aluminiums, 0.4 ton of silicon metal; With ZL102 waste casting and fine aluminium material, heating is dissolved it, and makes temperature be controlled at 650 ℃ earlier; With silicon metal material decon, the lumpiness diameter is pressed into aluminium liquid by criticizing in four batches at 10～30mm; Every batch be pressed into after, adopt mechanical stirring, make the silicon metal dissolving, after be sure oing to have dissolved, add the 2nd batch of silicon metal; Operation sequence before repeating adds until whole silicon metals, and dissolving fully; After the composition chemical examination is qualified, carries out refinement and denaturation and handle; The check metallurgical quality is qualified through the stokehold, skimming casting ingot-forming (ZL102 regeneration aluminium ingot composition sees Table 3).
The ZL102 regeneration aluminium ingot composition of table 3 preparation
| Element | Si | Fe | Al |
| Content (%) | 11.6 | 0.7 | Surplus |
Claims (4)
1. a cold melt process for secondary aluminium comprises the following steps:
A, secondary aluminum furnace chargeization are clear, form al molten bath, take off removing dross;
B, control stove inner melt temperature are at 630～720 ℃;
C, the silicon metal for preparing is pressed into the molten bath, and stirs, make silicon metal fully be dissolved into melt;
D, add various required alloying elements again, and abundant stirring and dissolving, qualified until composition;
Carry out refinement and denaturation after E, composition are qualified and handle, last skimming casting ingot-forming.
2. according to the described cold melt process for secondary aluminium of claim 1, it is characterized in that controlling melt temperature at 650～720 ℃.
3. according to the described cold melt process for secondary aluminium of claim 1, it is characterized in that adding described silicon metal raw material through the selected removal of impurity and dust, crystallization control silico briquette degree diameter is at 10～50mm.
4. according to claim 1 or 3 described cold melt process for secondary aluminium, it is characterized in that silicon metal divides some batches to be pressed into aluminium liquid molten bath, and adopt the method for artificial or machinery or induction stirring to stir, make silicon metal fully be dissolved into melt; Add other required various alloying elements again, and abundant stirring and dissolving, qualified until composition, refinement and denaturation is handled, and reaches the requirement teeming temperature, the skimming casting ingot-forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101068735A CN101280366B (en) | 2008-05-22 | 2008-05-22 | Cold smelt process for secondary aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101068735A CN101280366B (en) | 2008-05-22 | 2008-05-22 | Cold smelt process for secondary aluminium |
Publications (2)
| Publication Number | Publication Date |
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| CN101280366A CN101280366A (en) | 2008-10-08 |
| CN101280366B true CN101280366B (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101068735A Expired - Fee Related CN101280366B (en) | 2008-05-22 | 2008-05-22 | Cold smelt process for secondary aluminium |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140579B (en) * | 2011-01-27 | 2012-07-04 | 袁晓东 | Low-temperature immersed melting process method for secondary aluminum |
| CN102839288B (en) * | 2012-10-09 | 2014-02-19 | 南通曼特威金属材料有限公司 | Low-temperature rapidly-smelting process for regenerative aluminum alloy |
| CN103042030B (en) * | 2012-12-28 | 2015-03-18 | 云南铝业股份有限公司 | Grain control method for production of ultrawide double-zero aluminum foil blanks by electrolytic aluminum liquid cast-rolling process |
| CN103146924B (en) * | 2013-03-18 | 2014-05-28 | 天津立中合金集团有限公司 | Multi-stage impurity removing and refining method in production process of secondary aluminum |
| CN103205586B (en) * | 2013-05-09 | 2015-08-12 | 云南奥凯科技开发有限责任公司 | A kind of method of aluminium scrap highly efficient regeneration cast aluminium alloy |
| CN103602829A (en) * | 2013-11-13 | 2014-02-26 | 安徽省金盈铝业有限公司 | Energy-saving feasible intermediate-frequency temperature-control regenerated aluminum smelting method |
| CN104004925B (en) * | 2014-06-11 | 2016-01-06 | 李霞 | A kind of rafifinal continuously purification device |
| CN105624481A (en) * | 2016-03-28 | 2016-06-01 | 福建省科源新型材料有限公司 | Aluminium product preparation technology capable of reducing cost and energy consumption |
| CN106756150B (en) * | 2016-12-12 | 2018-03-09 | 云南云铝润鑫铝业有限公司 | The method that electromagnetic agitation melting refining aluminium alloy is closed using furnace for intermediate frequency furnace smelting duplex |
| CN109112310A (en) * | 2018-08-29 | 2019-01-01 | 黄全 | A kind of secondary aluminium alloy method of smelting |
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