The process and test situation of dealuminization with oxygen bottom blowing are introduced. With this method, the Al content can be reduced from 2%to 0. 5%, the eeonomical benefits are very well.

• 介绍了炉外加合成渣底吹氧对75%25硅铁降铝的工艺方法及其试验情况，该法可将75%25硅铁的铝含量由2%25左右降至0．5%25以下，具有较好的经济效益。