Extracting method and extracting device for high purity aluminum
An extraction method and high-purity technology, which is applied in the production of refined aluminum products with a purity above 3N, can solve the problems of complicated operation process and difficult control of pure aluminum crystallization, and achieve good separation effect, energy saving and convenient operation
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[0045] Example 1
[0046] Put the molten aluminum ingots containing Si, Fe, Cu, Pb, Zn, Ca, Ti, Cd, Ag, In and other elements into a vacuum heater to heat to 690-700°C to obtain molten aluminum, which contains an injection level In the middle of the crystallizer, crystallization occurs at a temperature of 670℃-680℃. After crystallization, pure aluminum settles in the lower part of the primary crystallizer due to its high density. The temperature of the molten aluminum with impurities above the crystallizer is still above the melting point. Above the primary crystallizer, it is sent to the secondary crystallizer to continue crystallization. Similarly, the crystallized pure aluminum settles in the lower part of the secondary crystallizer, and the aluminum liquid containing impurities floats above the secondary crystallizer. Send to the three-stage crystallizer, through the three-stage or four-stage crystallizer, the aluminum liquid containing more impurities is sent to the impurity...
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