Ultra-pure aluminum purification crystallization method
A technology of crystallization and pure aluminum, applied in the field of purification crystallization of ultra-high-purity aluminum, which can solve the problems of low product purity, low purification efficiency, and easy generation of oxides, so as to achieve a stable liquid level and reduce the generation of oxides , to reduce the effect of exposure
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[0037] Example: Take the purification of 5N aluminum to 5N5 as an example.
[0038] Step 1. Melt a certain amount of 5N aluminum block in the crucible, and keep the temperature at 660-680°C.
[0039] Step 2: Install the purification and crystallization device above the crucible. At this time, the upper swivel body 9 and the lower swivel body 10 are inserted under the liquid aluminum liquid level, and the upper swivel body 9 is located below the liquid aluminum liquid level.
[0040] Step 3: Continuously feed 50-100L / min room temperature air into the crystallization device.
[0041] Step 4. Turn on the rotary motor 3 to continuously rotate the lower swivel 10, control the steering motor 6, so that the upper swivel 9 and the lower swivel 10 rotate in opposite directions, increase the rotational speed to about 80rpm and keep the liquid level from being driven, rotate. During the process, the aluminum liquid with high purity is preferentially solidified due to the cooling effect ...
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