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A method for removing iron from recycled aluminum alloys

A technology for aluminum alloys and aluminum alloy melts, applied in the field of iron removal from secondary aluminum alloys, can solve the problems of high cost, non-continuous treatment, inconvenient operation, etc. The effect of less gas

Active Publication Date: 2016-08-24
顺博铝合金湖北有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, centrifugal separation is inconvenient for large batches of charge, and cannot be processed continuously, and the waste of charge is serious, so it still needs to be greatly improved when used in actual production; the cost of electromagnetic separation is too high, and the combination of gravity sedimentation and flux method can not only effectively remove iron And the operation is simple and feasible, easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] After grinding the refining agent and borax separately, accurately weigh 0.15% of the refining agent and 0.2% of borax, respectively wrap them in aluminum foil and put them in an oven to raise the temperature to 250°C for 2 hours. When the regenerated aluminum alloy is melted and the slag is removed, when the temperature of the molten aluminum is 720°C, use a bell jar to press into the refining agent, keep it warm for 10 minutes, and then remove the slag. The measured temperature of the aluminum liquid is 680°C, press into the borax, hold it for 10 minutes, and then remove the slag. Then keep it warm for 30 minutes until it is air-cooled. The measured iron removal rate was 5.08%.

Embodiment 2

[0016] After grinding the refining agent and borax separately, accurately weigh 0.2% of the refining agent and 0.5% of borax, respectively wrap them in aluminum foil and put them in an oven to raise the temperature to 200°C for 2.5 hours. When the regenerated aluminum alloy is melted and the slag is removed, when the temperature of the molten aluminum is 730°C, use a bell jar to press into the refining agent, keep it warm for 10 minutes, and then remove the slag. The measured temperature of the aluminum liquid is 680°C, press into the borax, hold it for 10 minutes, and then remove the slag. Then keep it warm for 60 minutes and wait for it to cool in the air. The measured iron removal rate was 5.79%.

Embodiment 3

[0018] After grinding the refining agent and borax separately, accurately weigh 0.25% of the refining agent and 0.8% of borax, respectively wrap them in aluminum foil and put them in an oven to raise the temperature to 250°C for 3 hours. When the regenerated aluminum alloy is melted and the slag is removed, when the temperature of the molten aluminum is 740°C, use a bell jar to press into the refining agent, keep it warm for 10 minutes, and then remove the slag. The measured temperature of the aluminum liquid is 680°C, press into the borax, hold it for 10 minutes, and then remove the slag. Then keep it warm for 90 minutes and wait for it to cool in the air. The measured iron removal rate was 4.87%.

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PUM

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Abstract

The invention discloses a method for removing iron in regenerated aluminum alloy. The method comprises the steps of firstly, respectively grinding a refining agent and borax, weighting 0.15-0.25% of refining agent and 0.2-0.8% of borax according to the mass percentage of aluminum alloy to be treated, respectively wrapping refining agent and borax by using aluminum foil paper, placing the wrapped refining agent and borax into a drying oven, heating to 200-250 DEG C, and preserving the heat for 2-3h; slagging off when the aluminum alloy is molten, pressing refining agent by using a bell jar when the temperature of the molten aluminum alloy is up to 720-740 DEG C, and slagging off after preserving the heat for 5-10min; pressing borax when the temperature of the molten aluminum alloy is up to 680-760 DEG C, and slagging off when the reaction is ended; preserving the heat and standing for 30-90min, and air-cooling. The method disclosed by the invention is simple, easy to control, good in chemical stability of a solvent and low in harmful gas content.

Description

technical field [0001] The invention belongs to the technical field of iron removal from secondary aluminum alloys. Background technique [0002] Recycled aluminum has great potential and advantages in saving energy consumption. However, the impurity elements in the alloy will have varying degrees of influence on the properties of the material, among which the effect of iron is the most obvious, and in most cases, the presence of iron has an The properties of aluminum alloys are detrimental. National standards generally limit the Fe content of cast aluminum alloys to less than 0.7 wt%, while the Fe content of high-strength cast aluminum alloys at home and abroad is limited to less than 0.35 wt%. The purification phenomenon of boron on the transition elements in aluminum originates from the research on the influence of the conductivity of industrial pure aluminum. Boron can transform the harmful impurities Ti, Cr, Fe, Zr in pure aluminum from the solid solution state to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C21/00C22B7/00
CPCY02P10/20
Inventor 杨湘杰易光斌郭洪明王言兵龚兆汉丁良生
Owner 顺博铝合金湖北有限公司