1. School of mechanical and electrical engineering, Xichang University, Xichang 615000, Sichuan, China; 2. Metallurgical Technology Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China
Abstract：In order to meet the requirements of pre-dephosphorization in the production of ultra-low phosphorus steel, the dephosphorization process of stainless steel hot metal was introduced. The industrial experiment of lime powder spraying+oxygen blowing in 45 t ladle was carried out. The results show that after the expected effect is achieved (w([Si])≤0.1%) in the hot metal desilication period, the average dephosphorization rate can be greater than 88% in the hot metal dephosphorization period. The calculation formulas of dephosphorization rate and phosphorus ratio in desilication period and dephosphorization period were regressed respectively. By adding fluorite, a better dephosphorization effect of hot metal could be obtained. With the increase of hot metal silicon content, hot metal temperature, oxygen consumption per ton of steel, lime consumption and slag basicity, the dephosphorization rate of hot metal increases significantly. The increase of w((TFe)) in slag has no significant effect on the dephosphorization rate of hot metal. It is considered that the current stainless steel hot metal dephosphorization method using lime powder spraying+oxygen blowing smelting is a very effective method for stainless steel hot metal dephosphorization.
赵斌, 吴伟, 吴巍, 张娜, 褚晓锐. 不锈钢喷粉吹氧法铁水脱磷工艺[J]. 中国冶金, 2022, 32(6): 155-162.
ZHAO Bin, WU Wei, WU Wei, ZHANG Na, CHU Xiao-rui. Dephosphorization process of hot metal by powder spraying and oxygen blow for stainless steel production[J]. China Metallurgy, 2022, 32(6): 155-162.
2022, Vol. 32 
