（1. School of Metallurgical and Ecological Engineering，University of Science and Technology，Beijing 100083，China 2. Steelmaking Department，Shougang Jingtang United Iron and Steel Co.，Ltd.， Tangshan 063200，Hebei，China）
Abstract：The technology of hot metal dephosphorization pretreatment and less-slag steelmaking process was optimized step by step in Shougang Jingtang. The dephosphorization rate could reach 70% through the optimization of scrap size，bottom tuyer number and arrangement in De-P converter. The steady temperature and P content in semi-steel after the pretreatment in De-P converter can provide a good condition for the less-slag steelmaking and automatic steelmaking to achieve double hit ratios by steelmaking end. By the measurements，such as keeping slag operation，less-slag steelmaking and slag splashing technology，the automatic end-point aim can reach 90% and the lining life was more than 7 000. All the materials containing Fe，such as steel containing slag， precipitator dust，scales and so on，were all recycled in steelmaking plant. Through the dephosphorization pretreatment and less-slag steelmaking process，the quality of steel improved，the total content of S，P，N can reach less than 0.009 5% in ultra-low P and S steel grades.
收稿日期: 2015-10-10
出版日期: 2016-04-26
引用本文:
赵长亮，孙彦辉，袁天祥，闫占辉，罗 磊. 转炉预脱磷与“全三脱”铁水少渣冶炼技术[J]. 钢铁, 2016, 51(5): 28-36.
ZHAO Chang-liang，，SUN Yan-hui，YUAN Tian-xiang，YAN Zhan-hui，LUO Lei. Dephosphorization pretreatment in LD converter and less-slag steelmaking process. Iron and Steel, 2016, 51(5): 28-36.
2016, Vol. 51 
