Method for separating iron element impurities from secondary aluminum melt through pulse current
A pulse current and element impurity technology, applied in the field of purification of recycled aluminum melt, can solve the problems of aluminum alloy melt pollution, long time period, complicated operation, etc., and achieve the effect of continuous processing, easy implementation and simple operation
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Embodiment 1
[0024] In this embodiment, pulse current treatment is performed on the Al-2.2% Fe melt in the crucible. Specific steps are as follows:
[0025] Step 1: Put the configured Al-2.2% Fe alloy material into a crucible and heat it in a resistance furnace to 1200°C for 60 minutes. To ensure that the acicular iron-rich phase in the master alloy Al-20%Fe is completely dissolved and the melt is homogenized. The size of the crucible is Φ50mm (inner diameter)×60mm.
[0026] Step 2: Determine the pulse processing parameters. Set the parameter range of the pulse current, and determine the pulse current parameters as frequency 31kHz, voltage 8V, pulse current density 9.8A / cm 2 , The action time is 70min.
[0027] The third step: pulse current treatment. When the Al-2.2% Fe melt is cooled down to 900°C with the furnace, two electrodes are inserted into the melt in parallel, and the pulse current treatment is started. After holding at this temperature for 10 minutes, cut off the heating ...
Embodiment 2
[0032] In this embodiment, pulse current treatment is performed on the Al-2.2% Fe melt in the crucible. Specific steps are as follows:
[0033] Step 1: Put the configured Al-2.2% Fe alloy material into a crucible and heat it in a resistance furnace to 1200°C for 60 minutes. To ensure that the acicular iron-rich phase in the master alloy Al-20%Fe is completely dissolved and the melt is homogenized. The size of the crucible is Φ50mm (inner diameter)×60mm.
[0034] The second step: determine the pulse current processing parameters. Set the parameter range of the pulse current, and determine the pulse current parameters as frequency 10kHz, voltage 12V, pulse current density 24.5A / cm 2 , The action time is 70min.
[0035] The third step: pulse current treatment. When the Al-2.2% Fe melt is cooled down to 900°C with the furnace, two electrodes are inserted into the melt in parallel, and the pulse current treatment is started. After holding at this temperature for 10 minutes, c...
Embodiment 3
[0040] In this embodiment, pulse current treatment is performed on the Al-2.2% Fe melt in the crucible. Specific steps are as follows:
[0041] Step 1: Put the configured Al-2.2% Fe alloy material into a crucible and place it in a resistance furnace to heat to 1200°C and keep it warm for 60min. To ensure that the acicular iron-rich phase in the master alloy Al-20%Fe is completely dissolved and the melt is homogenized. The size of the crucible is Φ70mm (inner diameter)×70mm.
[0042] The second step: determine the pulse current processing parameters. Set the parameter range of the pulse current, and determine the pulse current parameters as frequency 200Hz, voltage 24V, pulse current density 49A / cm 2 , the action time is 10min.
[0043] The third step: pulse current treatment. When the Al-2.2% Fe melt is cooled down to 750°C with the furnace, two electrodes are inserted into the melt in parallel, and the pulse current treatment is started. After holding at this temperatur...
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