Discussion and Practice on Oxygen Lance Height in 120 t Converter 在线阅读 下载PDF
Author of the article:CUI Xiaomei;WEI Dongqing
Author's Workplace：Anhui Vocational College of Metallurgical Science and Technology,Maanshan 243000,China;Feima Zhike Technology Co.,Ltd.,Maanshan 243000,China
Key Words：oxygen lance height slag accident composition temperature
Abstract：The influence of silicon and carbon content,and molten iron temperature on oxygen lance height of 120 t convert was studied by theoretic analysis and industrial test.The results show that the primary silicon content in molten iron is the most important factor affecting oxygen lance height.In general,the higher the original silicon content,the higher the oxygen lance height from the level of liquid iron bath.The carbon content and temperature of liquid iron also have effect on oxygen lance height.The oxygen lance height for high-carbon molten iron is about 100 mm higher than that for low-carbon molten iron.If temperature is low in the early stage and silicon is low,the oxygen lance height should be lowered to 1600 mm before 4 min,otherwise the excessive FeO in slag will lead to spillage accident in the furnace within 5 min.
