| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a refining method of aluminum in which high yield of a product is obtained and a quantity of eutectic impurity, such as Si, Fe, etc., is sufficiently reduced, and to provide the use of refined Al obtained with this method. SOLUTION: In the refining method of aluminum, (N+1) pieces of holding vessels (N is the integer of >=2) and N pieces of cooling bodies are prepared and the number is attached to each vessel and cooling body. Firstly, after holding Al as the raw material for refining in (N+1) piece of holding vessels in a molten state, one series of processes [high purity Al is crystallized (1), the vessel and the cooling body are relatively shifted (2), the refined A1 is melted (3), the vessel and the cooling body are relatively shifted to recover the refined molten A1 (4)] is repeatedly performed in >=2 time. Thereafter, molten Al in the 1st holding vessel is discharged, the molten Al in the (n+1)-th holding vessel (n is the integer from 1 to N) is translated into the n-th holding vessel to perform the refining of Al as one cycle till supplying a part of the refined Al recovered with the process (4) into (N+1)-th vessel in the molten state.</p> |
