Blown in a vacuum carbon deoxidation process 100 ~ 200 L / min of argon stirring supply iron silica fume, to produce CO bubble created conditions fume buy iron, vacuum up to 0.5 torr vacuum is released, you can reach the steel free oxygen content of 100 × 10-6 or less. First furnace of steel without iron alloy and pre Deoxidizer silica fume, melt free oxygen at about 500 × 10-6, a large bag at temperatures above 1580 ℃ directly into the vacuum position, according to the carbon content of the liquid steel by carbon to 0.13% and then subjected to vacuum carbon deoxidation for about 8 min, a vacuum of 0.5 Torr vacuum is released, sampling winched to LF refining, according to different kinds of steel directly into the corresponding amount of manganese alloys, step after step with normal furnace operations. Diffusion deoxidation: powdery deoxidizer added to the slag, slag by reducing the oxygen potential metastatic spread of oxygen in molten steel to the slag, 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; less steel inclusions harmful residues, high cleanliness molten steel; disadvantages: slow deoxidation, longer, consume more oxygen absorber. Buy fume, Hua Tuo metallurgy (certified), iron silica fume by Anyang Hua Tuo metallurgical limited liability company. Anyang Hua Tuo metallurgical limited liability company (www.htyjnc.com) is Anyang, ferroalloy and products leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hua Tuo metallurgical leadership in the staff warmly welcome all inquiries negotiations to create Hua Tuo metallurgy better future.