【作者】 王杨； 王峰； 杨树峰； 李京社；

【Author】 WANG Yang;WANG Feng;YANG Shu-feng;LI Jing-she;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing;Hesteel Group Tangsteel Company;

【机构】 北京科技大学冶金与生态工程学院钢铁冶金系； 河北钢铁集团唐钢公司；

【摘要】 双渣法炼钢工艺能够实现低磷钢、超低磷钢的冶炼,同时还可以减少炼钢用石灰、白云石消耗量以及炼钢渣量。本文通过对唐钢公司150t转炉进行双渣炼钢工业试验,分析了双渣工艺对转炉冶炼脱磷率以及物料消耗的影响。结果表明:双渣炼钢工艺能够充分利用转炉冶炼前期温度低这一有利于脱磷反应的热力学条件实现快速高效脱磷。在脱磷阶段应当选用低碱度渣系(R在1.5~2.0),当炉渣碱度为1.7时,脱磷率达到最大值71%。采用双渣冶炼工艺后终点P含量由平均为0.018%降低至平均为0.011%,脱磷效率提高6%以上。基于高效脱磷,渣铁快速分离及倒渣等关键因素,在生产同等低[P]钢种的条件下,采用双渣冶炼工艺生产效率是提高的。因倒渣增加的时间与单渣法后吹脱[P]造成的冶炼周期增加相近,而钢铁料消耗和渣料消耗均明显降低。更多还原

【Abstract】 The double slag converter steelmaking process can smelt low-and ultra-low-phosphorus steel and reduce lime and dolomite consumption and the amount of final slag simultaneously.Industrial steelmaking tests on a 150-metric ton converter at the Tangsteel Company were carried out to study this principle and its effect on the dephosphorization ratio and material consumption.The results showed that low-temperature stage could be used with a reduced amount of slag in the double slag steelmaking process to achieve rapid and efficient dephosphorization.A smelting process that uses double slag production requires a low-basicity slag(~1.5-2.0) in the dephosphorization stage.The dephosphorization ratio reached a maximum of 71%when the slag basicity was 1.7.The end-point phosphorus content after the smelting process(which produces less slag) was reduced from an average of 0.018%to an average of 0.011%and the dephosphorization efficiency increased by more than 6%.Based on key factors such as an efficient dephosphorization and a rapid iron-slag separation,the production efficiency was improved and the smelting cycle increased by only four minutes over the conventional process.更多还原