Oxygen is based on the laws of diffusion-deoxy-established experimental silicon powder, commonly used for the reduction of the external electric or liquid steel refining. With liquid steel oxygen diffusion into the slag, slag (FeO) gradually increased, in order to make (FeO) is maintained at a low level, to be added in the slag deoxidizer to restore slag (FeO), which can guarantee the liquid steel The oxygen continued to spread to the slag. Product diffusion deoxygenated present in the slag, which will help to improve the purity of the liquid steel a fume, but slow diffusion deoxidation, long time, may be stirred by argon or mixed with salt and other slag deoxidation process accelerated manner. Before the addition of nanometer silica fume, diffusion deoxidation operation, it needs a new press, to prevent the return of phosphorus. Blown 100 ~ 200 L / min in a vacuum carbon deoxidation process argon stirring, to produce CO gas bubbles to create the conditions, the degree of vacuum of 0.5 torr vacuum is released, it can reach the free oxygen content in steel 100 × 10-6 the following. First furnace of steel without alloy and pre deoxidizer, melt free oxygen at about 500 × 10-6, a large bag at temperatures above 1580 ℃ directly into the vacuum position, increased to 0.13% carbon, silica fume activity based on the carbon content of the liquid steel 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. Ultrafine silica fume, silica fume, Hua Tuo Hua Tuo metallurgy by Anyang metallurgical limited liability company. Anyang Hua Tuo metallurgical limited liability company (www.htyjnc.com) strong, credible, in Anyang of ferroalloy products and other industries and has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hua Tuo metallurgy and you hand into the brilliant, for a better future!