Diffusion deoxidation: powdery deoxidizer added to the slag, slag by reducing the oxygen potential metastatic spread of oxygen in molten steel to the slag, Hebei efficient oxygen scavenger, thereby reducing the oxygen content of the molten steel in a deoxy method. Advantages: deoxygenation reaction is carried out in the slag, the slag present in the product; the steel is less harmful residual inclusions, efficient deoxidizer, high cleanliness molten steel; disadvantages: slow deoxidation, longer, Shandong efficient deoxidizer deoxidizer consume more. Increased steel - slag interface, accelerated physical and chemical reactions; agitation bath, uniform composition and temperature; conducive to the discharge of floating inclusions and gases; exotherm; conducive to the formation of slag; outbreak of oxygen The reaction can cause splash;