| 摘要 |
Aluminium is alloyed by adding alloying ingredients to the molten metal in an intermediate treatment vessel or ladle rather than as at present in a casting furnace. If several ladles are used to supply the casting furnace, the alloying ingredients may be added to some but not all of them. A preferred order of addition of alloying ingredients is: i) AlF3 to reduce unwanted Na, Ca and Li; ii) one or more of Mn, Fe, Cr, Ni, Cu, Zn and Si in powder form; iii) one or more of Zn, Cu and Si in massive form; iv) Mg. A ladle/impeller design is described. |
