a water-cooled oxygen lance is lowered to within about a meter of the molten iron and high purity oxygen is blown on to the iron. The oxidation process begins. This oxidation produces heat, so no outside heat is needed.

• 水冷氧枪放下到距铁水约1米左右处，把高纯度氧气吹向铁水表面，氧化过程开始。这种氧化要产生热，因此不需要外来热源。