To provide a continuous refining system for high purity aluminum, which can reduce eutectic impurities and peritectic impurities, reduce residual molten metal generating in refining to the utmost, and also enhance the energy efficiency at the time of refining treatment, in a short period of time and with a small facility area.
In the system, one set of a line is composed of series of equipment including aluminum melting furnaces 11, 21 and 31, serially connected several molten metal holding vessels 13, 23 and 33, and rotary cooling bodies 130, 230 and 330, each forming a pair with each of molten metal holding vessels. The system consists of N-th order lines (where, 2≤N) using a plurality of sets of these lines. A high purity aluminum lump attached to the rotary cooling body to be solidified and recovered at the (n-1)-th order line (where, 2≤n≤N) is melted in the following melting furnace of n-th order line, and molten metal is successively discharged through the molten metal holding vessels. The number of the holding vessels and the rotary cooling bodies of the n-th order line is less than the number of those of (n-1)-th order line.
COPYRIGHT: (C)2009,JPO&INPIT
Maeda Masao
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Ken Takada
Yoshihito Shimizu
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