摘要
京唐公司炼钢系统铁水转炉预脱磷及"全三脱"铁水少渣冶炼工艺不断进行技术优化,脱磷转炉通过优化废钢尺寸、底吹枪数量和排布,半钢脱磷率可达到70%;铁水经过脱磷转炉脱硅、脱磷后,温度和磷质量分数更加稳定,为脱碳转炉少渣冶炼、自动化炼钢终点双命中率的提高提供了先决条件;脱碳转炉通过采用留渣操作、少渣冶炼技术、溅渣护炉技术后,自动化命中率达到90%以上,炉龄达到7 000炉以上;炼钢车间内渣钢、除尘灰、氧化铁皮等含铁物料实现了自循环消耗。采用"全三脱"铁水冶炼工艺,钢种质量进一步提高,超低磷与超低硫钢中(S+P+N)元素质量分数可稳定控制在0.009 5%以下。
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.
出处
《钢铁》
CAS
CSCD
北大核心
2016年第5期28-36,共9页
Iron and Steel
关键词
转炉
预脱磷
少渣冶炼
converter
dephosphorization pretreatment
less-slag steelmaking
