CN1673399A - Process for waste aluminium alloy smelting purification regenerative utilization - Google Patents
Process for waste aluminium alloy smelting purification regenerative utilization Download PDFInfo
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- CN1673399A CN1673399A CN 200510033380 CN200510033380A CN1673399A CN 1673399 A CN1673399 A CN 1673399A CN 200510033380 CN200510033380 CN 200510033380 CN 200510033380 A CN200510033380 A CN 200510033380A CN 1673399 A CN1673399 A CN 1673399A
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Abstract
The present invention relates to casting technology, and is waste aluminum alloy smelting and regenerating process in a pot furnace with stirrer, extruder and heat insulating cover. The waste aluminum alloy smelting and regenerating process includes adding filtering carrier layer of density higher than that of aluminum melt and with flux layer covering the surface in the bottom of the pot, adding material layer, adding the covering layer of density lower than that of aluminum melt, heating to temperature lower than the aluminum alloy softening temperature to led out volatile from the inside the pot through the pipe in the cover for igniting, extruding at the aluminum alloy softening temperature to form molten aluminum alloy layer and covering layer, stirring, filtering the molten aluminum alloy via the flux film and leading out the aluminum alloy via the bottom of the pot.
Description
Technical field: what the present invention relates to is the method that a kind of purifying aluminium alloy melt is handled, and belongs to casting field.
Background technology: the purpose of waste aluminium alloy smelting purification is the recovery of aluminium alloy resource and regeneration.Can be divided into direct heating and indirect heating dual mode by type of heating, direet-heating type is owing to the scaling loss of aluminium alloy and purify and take away the serious waste that aluminum metal partly causes the aluminium alloy resource in the slagging process, scaling loss is the immediate cause that non-metallic inclusion produces, and also is the immediate cause that source of pollution aluminium slag produces.Scaling loss is mass consumption aluminum metal resource not only, and brings very big difficulty to aluminium melt purifying, causes waste aluminium alloy reconstituted product debase, does not reach the purpose of regeneration.Traditional indirect heating mode, scaling loss reduces relatively, but the problems referred to above still exist, and because of its limitation can not get the development, at present domestic and international waste aluminium alloy regenerated melting method, use history decades till today, burning problems aluminium base and alloying element restricts the development of regeneration Aluminum all the time in the raw material.
Summary of the invention and embodiment: the present invention is directed to the deficiencies in the prior art and defective, the method for a kind of indirect heating mode melting and purifying worn-out aluminium alloy regeneration is provided.Evaporation of metals exists in fusion process all the time, and aluminium is again a kind of very active metal, and in fusion process, aluminium alloy contact with steam, air at fusion or semi-melting state and causes molten aluminium a large amount of air-breathing and oxidations to generate hydrogen and oxidation easily to mix and press from both sides (AL
2O
3), therefore, evaporation of metal and oxidation are the basic reasons that causes scaling loss in the aluminium alloy smelting process, reducing evaporation of metal to greatest extent and avoiding oxygenizement is the unique channel that scaling loss takes place in the control aluminium alloy smelting purification process.Concrete grammar of the present invention is as follows: design the crucible furnace that agitator, raw material squeezer, insulation cover (conduit is arranged in the middle of the lid) are housed above, the lifting of above-mentioned three kinds of device adjustment heights, can comprehensively move, as required, the wheel flow operation, the aluminum alloy melt after the purification is drawn outside the stove through crucible bottom conduit.Flux by carrier granule and raw material in order layering add melting crucible, evenly cover one deck flux layer in carrier particle surface, the carrier granule material must have high melt point and sufficient intensity, does not melt in melting and purifying aluminium alloy process, and is not cracked.The carrier granule that density＞molten aluminium has been covered flux layer is placed on the crucible bottom surface and makes filtering layer, the filtration aspect is higher than earthenware aluminium bottom conduit and inserts mouth, the carrier granule size is greater than conduit and inserts a mouthful bore, put into the carrier granule of putting density＜molten aluminium behind the raw material into and make tectum on filtering layer, carrier granule size consumption is selected according to actual needs.The control furnace temperature, when furnace temperature was lower than the aluminium alloy stock softening temperature, volatile matter was drawn through the insulation cover intermediate pipe and is lighted in the crucible.When the raw material softening temperature, extruding tectum and raw material layer, form aluminium alloy liquid layer and tectum together, reach all fused temperature of flux and raw material, carrier particle surface covers one deck flux film, form filtering layer, begin to stir (making agitator paddle be in the aluminium alloy liquid layer all the time), make the temperature uniformity, quicken fusing, the oxide film of waste aluminium alloy original surface is broken to be entered in the aluminum alloy melt, stop to stir leave standstill after, after aluminum alloy melt purifies through filtering layer, draw outside the stove by crucible bottom conduit.
By being covered with flux layer, the carrier granule of density＜molten aluminium is formed, the tectum that in the process of waste aluminium alloy raw material softening temperature extruding tectum and raw material layer, forms with the aluminium alloy liquid layer, can control the scaling loss of the waste aluminium alloy aluminium base and alloying element in the melting and purifying process that meets alloy composition standard effectively, except that alloying element magnesium (Mg), the Chemical Composition of all the other alloying elements remains unchanged substantially in the former waste aluminium alloy, all reach alloy composition standard, and can control the scaling loss amount of the aluminium alloy of alloying element (Mg) different content effectively at melting and purifying process interalloy element magnesium (Mg), scaling loss amount according to alloying element magnesium (Mg), under the condition of not adding primary aluminium (fine aluminium), add alloying element magnesium (Mg), recover the Chemical Composition of former each alloying element of aluminium alloy.
The refining plant of the filtration, purification molten aluminium of being made up of the carrier granule of covering flux film belongs to stove external purifying device, is introduced into the furnace purge system, has improved the degree of purification of aluminium alloy melt nonmetal inclusion.
The present invention has aluminium alloy rate of recovery height, and the evident characteristic that can produce the fine aluminum alloy also has less investment, and treatment capacity is big, and reproduction speed is fast, and is easy to operate, and free of contamination characteristics have huge social benefit and economic benefit.
Provide following three embodiment in conjunction with content of the present invention:
Embodiment one. the waste and old aluminum easy open can lid material of melting and purifying regeneration (trade mark 5182)
The waste and old aluminum easy open can lid of table 1.100% material
| Chemical Composition (wt%) | Mg | Si | Fe | Cu | Zn | Mn | Cr | Ti |
| 3.9 | 0.10 | 0.20 | 0.04 | 0.01 | 0.36 | 0.02 | 0.01 | |
| The Chemical Composition standard | 4.0～5.0 | ≤0.20 | ≤0.35 | ≤0.15 | ≤0.25 | 0.20～0.50 | ≤0.10 | ≤0.10 |
| Contrast | Defective | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
The waste and old aluminum easy open can lid of table 2.100% material+1% alloying element magnesium (Mg)
| Chemical Composition (wt%) | Mg | Si | Fe | Cu | Zn | Mn | Cr | Ti |
| 4.9 | 0.11 | 0.23 | 0.05 | 0.01 | 0.36 | 0.02 | 0.01 | |
| The Chemical Composition standard | 4.0～5.0 | 0.20 | 0.35 | ≤0.15 | ≤0.25 | 0.20～0.50 | ≤0.10 | ≤0.10 |
| Contrast | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Embodiment two. the melting and purifying worn-out aluminum easy open can body material (trade mark: 3004)
| Chemical Composition wt%) | Mg | Si | Fe | Cu | Zn | Mn | Cr | Ti |
| 0.9 | 0.28 | 0.41 | 0.19 | 0.03 | 1.0 | 0.02 | 0.02 | |
| The Chemical Composition standard | 0.8～1.3 | 0.30 | ≤0.7 | ≤0.25 | ≤0.25 | 1.0～1.5 | 0.05 | ≤0.05 |
| Contrast | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Embodiment three. waste and old 6063 material of melting and purifying regeneration
Waste and old 6063 material of table 1.100%
| Chemical Composition wt%) | Mg | Si | Fe | Cu | Zn | Mn | Cr | Ti |
| 0.37 | 0.45 | 0.26 | 0.06 | 0.09 | 0.04 | 0.01 | 0.01 | |
| The Chemical Composition standard | 0.45～0.9 | 0.20～0.6 | ≥0.35 | ≥0.1 | ≥0.10 | ≥0.10 | ≥0.10 | ≥0.10 |
| Contrast | Defective | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Waste and old 6063 material of table 2.100%+0.4% alloying element magnesium (Mg)
| Chemical Composition wt%) | Mg | Si | Fe | Cu | Zn | Mn | Cr | Ti |
| 0.7 | 0.45 | 0.26 | 0.06 | 0.09 | 0.04 | 0.01 | 0.01 | |
| The Chemical Composition standard | 0.45～0.9 | 0.20～0.6 | ≥0.35 | ≥0.10 | ≥0.10 | ≥0.10 | ≥0.10 | ≥0.10 |
| Contrast | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Claims (3)
1. the method for a waste aluminium alloy smelting purification regeneration, it is characterized in that concrete grammar is as follows: design the crucible furnace that agitator, raw material squeezer, insulation cover (conduit is arranged in the middle of the lid) are housed above, the lifting of above-mentioned three kinds of device adjustment heights, can comprehensively move, as required, the wheel flow operation, the aluminum alloy melt after the purification is drawn outside the stove through crucible bottom conduit.Flux by carrier granule and raw material in order layering add melting crucible.Evenly cover one deck flux layer in carrier particle surface, the carrier granule material must have high melt point and sufficient intensity, does not melt in melting and purifying aluminium alloy process, not cracked.The carrier granule that density＞molten aluminium has been covered flux layer is placed on the crucible bottom surface and makes filtering layer, the filtration aspect is higher than crucible bottom conduit and inserts mouth, the carrier granule size is greater than inserts a mouthful bore, put into the carrier granule of putting density＜molten aluminium behind the raw material into and make tectum on filtering layer, carrier granule size consumption is selected according to actual needs.The control furnace temperature, when furnace temperature was lower than the aluminium alloy stock softening temperature, volatile matter was drawn by the insulation cover intermediate pipe and is lighted in the crucible.When the raw material softening temperature, extruding tectum and raw material layer, form aluminium alloy liquid layer and tectum together, reach all fused temperature of flux and raw material, carrier particle surface covers one deck flux film, form filtering layer, begin to stir (making agitator paddle be in the aluminium alloy liquid layer all the time), make the temperature uniformity, quicken fusing, the oxide film of waste aluminium alloy original surface is broken to be entered in the aluminum alloy melt, stop to stir leave standstill after, after aluminum alloy melt purifies through filtering layer, draw outside the stove by crucible bottom conduit.
2. the method for this waste aluminium alloy smelting purification regeneration according to claim 1, it is characterized in that by being covered with flux layer, the carrier granule of density＜molten aluminium is formed, the tectum that in the process of waste aluminium alloy raw material softening temperature extruding tectum and raw material layer, forms with the aluminium alloy liquid layer, the scaling loss of the waste aluminium alloy that can control meets the alloy composition aluminium base and alloying element in the melting and purifying process limitedly, except that alloying element magnesium (Mg), the Chemical Composition of all the other alloying elements remains unchanged substantially in the former waste aluminium alloy, all reach alloy composition standard, and can control the scaling loss amount of the aluminium alloy of alloying element magnesium (Mg) different content effectively at melting and purifying process interalloy element magnesium (Mg), scaling loss amount according to alloying element magnesium (Mg), under the condition of not adding primary aluminium (fine aluminium), add alloying element magnesium (Mg), recover the Chemical Composition of former each alloying element of aluminium alloy.
3. the method for this waste and old aluminium melting and purifying according to claim 1 regeneration, the refining plant that it is characterized in that the filtration, purification aluminium alloy melt be made up of the carrier granule of covering flux film belongs to stove external purifying device, be introduced into the furnace purge system, improved the degree of purification of aluminium alloy melt nonmetal inclusion.
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| CN 200510033380 CN1673399A (en) | 2005-03-07 | 2005-03-07 | Process for waste aluminium alloy smelting purification regenerative utilization |
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| CN 200510033380 CN1673399A (en) | 2005-03-07 | 2005-03-07 | Process for waste aluminium alloy smelting purification regenerative utilization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218869A (en) * | 2011-09-16 | 2019-09-10 | 鲍尔公司 | Impact extruded container is manufactured with recycling aluminium scrap |
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2005
- 2005-03-07 CN CN 200510033380 patent/CN1673399A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218869A (en) * | 2011-09-16 | 2019-09-10 | 鲍尔公司 | Impact extruded container is manufactured with recycling aluminium scrap |
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