| 摘要 |
PURPOSE:To rapidly refine an alloy to high purity in a high yield by holding the alloy at the solidus line temp. to the liquidus line temp., adding a refining agent to the alloy while agitating the alloy, and vigorously agitating the alloy to efficiently remove impurities from the alloy. CONSTITUTION:An alloy to be refined is held at the solidus line temp. to the liquidus line temp., and while the alloy is agitated, a refining agent such as Ca-CaF2 is added. The alloy is vigorously agitated by applying high or low frequency power or electromagnetic force or blowing gas, and slag is removed so that impurities do not return from the slag to the alloy. The above-mentioned refining may be repeatedly carried out. Impurity elements such as P, S and As in the alloy are efficiently removed and a high purity alloy is obtd. in a high yield. |
