Deoxy method: slag deoxidation. Anyang steel powdery deoxidizer deoxidizer, such as toner, silicon carbide or ferrosilicon powder sprinkled on the slag surface, reducing slag (FeO) supply steelmaking deoxidizer, reducing its oxygen content, prompting steel The diffusion of oxygen into the slag steelmaking deoxidizer, so as to achieve the objective of reducing the price of steel oxygen steelmaking deoxidizer content, which is called slag deoxidation deoxy-operation. Oxygen capacity of the elements: sulfur and manganese can reduce the harm. After remaining in the deoxy-manganese steel can be generated with a high melting point of sulfur (1620 ℃) ??plastic inclusions MnS, reduce heat embrittlement tendency of steel to reduce the harmful effects of sulfur. Silicon is the most commonly used deoxy-killed steel elements. Strong deoxidizing element silicon, the silicon content of the molten steel oxygen balance is low.